CN113706740A - Automobile data recorder with control circuit - Google Patents

Abstract

A vehicle event data recorder with a control circuit comprises an MIC module, a 3G module power supply loop, a display screen module, a liquid crystal screen decoding module, a main power supply 5V power supply circuit, an ACC power-on detection circuit, a main chip circuit, a power amplifier control loop, an audio control module, an RS232 transceiver module, a USB 2.0 shunt module and an SD card power supply control circuit, wherein video data collected by a camera is transmitted to the main chip through the RS232 transceiver module, the main chip transmits the data to the display screen module through the liquid crystal screen decoding module, real-time video is displayed on the display screen, meanwhile, the main chip stores the video data in the SD card for storing user vehicle event data, the 3G module is used for remotely checking the video data of the vehicle event data recorder through APP, the user is greatly facilitated to check the vehicle event data of the user, and the power amplifier control loop is used for playing the sound of a command sent by the main chip, the audio control module is used for adjusting the volume and the sound channel to be suitable for the user to listen; has good practicability and wide application value.

Description

Automobile data recorder with control circuit

Technical Field

The invention belongs to the field of automobile data recorder control, and particularly relates to an automobile data recorder of a control circuit.

Background

With the development of science and technology and the diversification of requirements, the automobile data recorder is an instrument for recording related information such as images and sounds during the running process of a vehicle, after the automobile data recorder is installed, video images and sounds in the whole running process of the vehicle can be recorded, evidence can be provided for traffic accidents, a memory card of the automobile data recorder is an important evidence carrier, voltage fluctuation and static electricity in the vehicle can often interfere with data storage in the running process of the automobile data recorder, in addition, the common automobile data recorder does not have a remote data uploading function and a user checking function, and in vehicles with higher safety levels, the recording, storage and real-time checking functions of the data cannot be performed.

Disclosure of Invention

A vehicle event data recorder with a control circuit comprises an MIC module, a 3G module power supply loop, a display screen module, a liquid crystal screen decoding module, amain power supply 5V power supply circuit, an ACC power-on monitoring circuit, a main chip circuit, a power amplifier control loop, an audio control module, an RS232 transceiver module, a USB 2.0 shunt module and an SD card power supply control circuit, wherein video data collected by a camera is transmitted to the main chip through the RS232 transceiver module, the main chip transmits the data to the display screen module through the liquid crystal screen decoding module, real-time video is displayed on the display screen, meanwhile, the main chip stores the video data in the SD card for storing user vehicle event data, the 3G module is used for remotely checking the video data of the vehicle event data recorder through APP, the user is greatly facilitated to check the vehicle event data of the user, and the power amplifier control loop is used for playing the sound of a command sent by the main chip, the audio control module is used for adjusting the volume and the sound channel to be suitable for a user to listen.

The power supply circuit is introduced with 12V voltage by an original vehicle power supply system, and then is reduced to 5V through a chip U1, 8 pins of the chip U1 are connected with 12V voltage, indirect resistors R3 of 3 and 6 pins, and 7 pins are connected with 35 pins of a main chip through a resistor R6; the MCU power supply circuit is composed of a power supply chip U3 and a diode D8, the model of the power supply chip U3 is NCV8664, apin 1 of the power supply chip U3 is connected with 12V voltage, apin 2 is grounded, apin 3 outputs MCU _ VCC voltage, and a pin is provided with a decoupling capacitor C35 and acapacitor EC 3; MCU pull-up power supply circuit comprises triode Q2 and MOS pipe Q1, triode Q2's 1 pin meets the 23 pins of main chip, 2 pin ground connections, 3 pins meet MOS pipe Q1's 1 pin, MOS pipe Q1's 3 pins connect IO _ VCC, 2 pins connect MCU _ VCC.

The main chip circuit is composed of a main chip and a peripheral circuit, the model of the main chip is STM32F103RCT6,pins 5 and 6 of the main chip are connected with a crystal oscillator circuit of 8MHz, the ACC power-on detection circuit comprises a triode Q3, a first lead of a 3 pin of the triode Q3 is connected with MCU _ VCC voltage, a second lead is connected with a 2 pin of the main chip, the 2 pin is grounded, the 1 pin is connected with an ACC node through a diode D4, the main chip filter circuit is composed of capacitors C16, C17, C18, C19, C20, C21 and C22, and a clean power supply is provided for the main chip; the main chip reset circuit is composed of a diode D5, a resistor R26, a diode D6 and a capacitor C29, the cathode of the diode D6 is connected with a key reset circuit, the main chip reset circuit is connected with the 7 pins of the main chip, the key reset circuit is composed of a restorer with the model number of IT-1210B, and the key reset circuit also resets the level signal of the power amplifier control circuit; the main chip debugging and burning chip circuit comprises a burning chip with the model number of SIP4P _1M27, wherein a 1 pin of the burning chip is connected with MCU _ VCC voltage through an inductor FB1, a 2 pin of a first lead is connected with the MCU _ VCC voltage through a resistor R31, a second lead is connected with a 46 pin of the main chip, a 3 pin of the first lead is connected with the MCU _ VCC voltage through a resistor R30, a second lead is connected with a 49 pin of the main chip, a 4 pin is grounded, a capacitor C27 is a filter capacitor at a power supply, a precise resistor R41 and a R45 of an AD sampling detection circuit form a voltage division network, the AD sampling detection circuit is connected with 12V voltage, and the AD sampling detection circuit is connected with an 11 pin of the main chip; the 16 pins of the main chip are connected with IO _ VCC voltage through resistors R47 and R27, the 17 pins are connected with IO _ VCC voltage through resistors R48 and R10, the 43 pins are connected with IO _ VCC voltage through resistors R34 and R32, the 42 pins are connected with IO _ VCC voltage through resistors R36 and R33, the 25 pins are connected with IO _ VCC voltage through resistors R49 and R35, and the capacitor C33 is a filter capacitor.

The 3G module comprises a chip CON2 and an external circuit, the model of the chip CON2 is U7500, the 1 pin of the chip CON2 is connected with an MIC key chip circuit through a 3G MIC chip circuit, the 3 pin is connected with the MIC key chip circuit through the 3G MIC chip circuit, the 5 pin is connected with the 8 pin of the chip U5 through a resistor R62, the 7 pin is connected with the 8 pin of the chip U5 through a resistor R64, thepins 33 and 22 are commonly connected with the 55 pin, 39 and 41 of the main chip, thepin 39 and 41 are connected with 3.4V voltage, a filter circuit is arranged at the voltage, thepin 2 is connected with 3.4V voltage, thepin 10 is connected with the 5 pin of the chip CON7 through a resistor R56, thepin 12 is connected with the 7 pin of the chip CON7, thepin 14 pin is connected with thepin 9 pin of the chip CON7, thepin 20 pin is connected with the 54 pin, thepin 22 pin is connected with the 33 pin of the chip CON2, thepin 24 is connected with 3.4V voltage, thepin 36 is connected with the chip U10, thepin 38 is connected with thechip 10 pin of the chip U2, the pin 52 is connected with 3.4V voltage, the 3G module power supply loop is composed of a chip U4, thepin 1 of the chip U4 is connected with thepin 37 of the main chip, thepin 2 is introduced with 5V voltage through an inductor FB3, thepins 4 and 5 output 3.4V voltage, the model of the chip U4 is MIC29302WU, and the model of the chip U5 is M62429P.

The power amplifier control circuit comprises a chip U7 and an external circuit, wherein the model of the chip U7 is LM4871LD, 2 and 3 pins of the chip U7 are grounded through a capacitor C68, a first lead of the 1 pin is connected with 5V voltage through a resistor R72 and an inductor FB11, a second lead is connected with a 38 pin of a main chip, a third lead is connected with a 4 pin of the restorer through a diode D10, a 6 pin is connected with 5V voltage through an inductor FB11, 7 and 9 pins are grounded, the 4 pin is sequentially connected with a 2 pin of the chip U5 through a resistor R70, a capacitor C69 and a capacitor C25, the 5 pin is connected with the 1 pin of the chip CON3 through an inductor FB12, and 8 pin is connected with a 2 pin of the chip CON3 through aninductor FB 13; the RS232 transceiver module comprises chip U6 and external circuit, the model of chip U6 is SP3232, connect electric capacity C63 between 1 and 2 pins of chip U6, connect electric capacity C65 between 4 and 5 pins, 2 pins are through electric capacity C64 ground connection, 6 pins are through electric capacity C66 ground connection, 15 pins ground connection, 16 pins connect IO _ VCC voltage through inductance FB10, 11 pins connect the 42 pins of main chip, 12 pins connect the 43 pins of main chip, 10 pins connect the 16 pins of main chip, 9 pins connect the 17 pins of main chip, RS232 transceiver module is used for connecting with RS232 serial port camera, be used for digital camera digital signal to send to main chip through 232 mode.

The display screen module comprises a screen display 3.3V control circuit, a screen display backlight control circuit and a screen display circuit, wherein a chip U8 of the screen display 3.3V control circuit introduces 5V voltage and outputs 3.3V voltage through a 5 pin; the screen display backlight control circuit comprises a chip U9 and an external circuit, wherein the model of the chip U9 is MP1488, a 6 pin of the chip U9 is connected with 5V voltage, a 1 pin is connected with a 2 pin of the chip CON4 through a diode D11, a 3 pin is connected with a 1 pin of the chip CON4 through a resistor R77, a 4 pin is connected with a 90 pin of the chip M2, the screen display circuit comprises the chip CON4 and the external circuit, the 4 pin of the chip CON4 is connected with 3.3V voltage, a 30 pin is connected with a 78 pin of the chip M2, a 31 pin is connected with 3.3V voltage through a resistor R75, a 37 pin is connected with a 27 pin of the chip M2, a 38 pin is connected with a 31 pin of the chip M2, a 39 pin is connected with a 26 pin of the chip M2, and a 40 pin is connected with a 30 pin of the chip M2.

The liquid crystal screen decoding module is composed of a chip M2 and an ARM debugging and burning chip, wherein the model of the chip M2 is MST701-LF, a 1 pin of the chip M2 is connected with a 15 pin of the chip U10, a 6 pin is connected with a 16 pin of the chip U10, a 14 pin is connected with a 3 pin of the chip CON6, a 16 pin is connected with a 9 pin of the chip CON6, a 17 pin is connected with a 3 pin of the chip U11, an 18 pin is connected with a 56 pin of a main chip, a 26 pin is connected with a 3 pin of the chip CON8, a 27 pin is connected with a 37 pin of the chip CON4, a 41 pin is connected with a 1 pin of thechip 8, a 42 pin is connected with a 2 pin of the chip CON8, a 45 pin is connected with a 40 pin of the main chip, a 46 pin is connected with a 36 pin of the main chip, 47 and 48 pins are grounded, and 49 and 50 pins are involved in 5V voltage; the ARM debugging and burning chip is composed of a chip CON5, IO _ VCC voltage is introduced into a 1 pin of the chip CON5 through an inductor FB15, an IO _ VCC voltage is connected to a first lead of a 2 pin through a resistor R98, an IO _ VCC voltage is connected to a second lead of the chip M2, an IO _ VCC voltage is connected to a first lead of a 3 pin through a resistor R97, a 92 pin of the chip M2 is connected to the second lead, and a 4 pin is grounded.

The USB 2.0 shunt module comprises a chip U10 and a peripheral circuit, wherein the model of the chip U10 is FE1_1s _ B _ SSOP28, 1 pin of the chip U10 is grounded, 2 and 3 pins are connected with a 12MHs crystal oscillator Y2, a 6 pin is connected with a 36 pin of the chip CON2, a 7 pin is connected with a 38 pin of the chip CON2, a 10 pin is connected with a 12 pin of the chip CON7, an 11 pin is connected with an 11 pin of the chip CON7, a 14 pin is grounded through a precision resistor R108, a 15 pin is connected with a 5 pin of the chip M2, a 16 pin is connected with a 6 pin of the chip M2, data information of the USB 2.0 shunt module is shared, video signal data of the chip M2 is shunted into two paths through a USB, one path is uploaded through a 3G module, and the other path passes through an external USB interface.

The USB power supply circuit introduces 5V voltage, the voltage is stabilized by a voltage stabilizing diode D14 and an inductor FB19, the USB _5V voltage is output, the SD card power supply control circuit comprises a chip U11 and peripheral circuits, 5V voltage is introduced into a 1 pin of the chip U11, voltage is input into a 4 pin of the chip CON6 through a 3 pin, the chip CON8 is a capacitive screen interface, the chip CON8 is FPC6P _0M5, and the chip CON9 is an MIC key interface.

Compared with the prior art, the technical scheme of the invention has the following beneficial technical effects: 1. the storage card is provided with the anti-static structure, so that the influence of static electricity in the vehicle on the storage effect can be effectively avoided; 2. the storage of the driving information is divided into SD card storage and information communication, and a user can check the driving information in real time.

Drawings

FIG. 1 shows a power supply circuit, an MCU power supply circuit, and an MCU pull-up power supply circuit;

FIG. 2 shows a main chip circuit, an ACC power-on detection circuit, a main chip filter circuit, a main chip reset circuit, a key reset circuit, a main chip debugging and burning chip circuit, and an AD sampling detection circuit;

FIG. 3 is a 3G module;

FIG. 4 shows a power amplifier control circuit and an RS232 transceiver module;

FIG. 5 is a display screen module;

FIG. 6 is a decoding module of a liquid crystal display;

FIG. 7 is a USB 2.0 splitter module;

FIG. 8 shows a USB power supply circuit and an SD card power supply control circuit.

The specific implementation mode is as follows:

to facilitate an understanding of the inventive circuit, the inventive circuit is described in more detail below with reference to the figures and the specific embodiments. Preferred embodiments of the present circuit are shown in the drawings, but the present invention may be embodied in many different forms and is not limited to the embodiments described in the specification. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for descriptive purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

The implementation mode is as follows:

as shown in fig. 1 to 8, a driving recorder with a control circuit comprises an MIC module, a 3G module power supply circuit, a display screen module, a liquid crystal screen decoding module, amain power supply 5V circuit, an ACC power-on monitoring circuit, a main chip circuit, a power amplifier control circuit, an audio control module, an RS232 transceiver module, a USB 2.0 splitter module, and an SD card power supply control circuit, wherein video data collected by a camera is transmitted to the main chip through the RS232 transceiver module, the main chip transmits the data to the display screen module through the liquid crystal screen decoding module, real-time video is displayed on the display screen, the main chip stores the video data in the SD card for storing driving data of a user, the driving recorder video data is remotely checked through an APP through the 3G module, so that the user can greatly check his driving record, the power amplifier control circuit is used for playing a sound of a command sent by the main chip, the audio control module is used for adjusting the volume and the sound channel to be suitable for a user to listen.

As shown in fig. 1, the power circuit is powered by 12V from the original vehicle power system, and then is powered down to 5V through a chip U1, 8 pins of the chip U1 are connected to 12V, and 3 and 6 pins of an indirect resistor R3 and 7 pins of the indirect resistor are connected to 35 pins of a main chip through a resistor R6; the MCU power supply circuit is composed of a power supply chip U3 and a diode D8, the model of the power supply chip U3 is NCV8664, apin 1 of the power supply chip U3 is connected with 12V voltage, apin 2 is grounded, apin 3 outputs MCU _ VCC voltage, and a pin is provided with a decoupling capacitor C35 and acapacitor EC 3; MCU pull-up power supply circuit comprises triode Q2 and MOS pipe Q1,triode Q2's 1 pin meets the 23 pins of main chip, 2 pin ground connections, 3 pins meet MOS pipe Q1's 1 pin, MOS pipe Q1's 3 pins connect IO _ VCC, 2 pins connect MCU _ VCC.

The main chip circuit is composed of a main chip and a peripheral circuit, the model of the main chip is STM32F103RCT6,pins 5 and 6 of the main chip are connected with a crystal oscillator circuit of 8MHz, the ACC power-on detection circuit comprises a triode Q3, a first lead of a 3 pin of the triode Q3 is connected with MCU _ VCC voltage, a second lead is connected with a 2 pin of the main chip, the 2 pin is grounded, the 1 pin is connected with an ACC node through a diode D4, the main chip filter circuit is composed of capacitors C16, C17, C18, C19, C20, C21 and C22, and a clean power supply is provided for the main chip; the main chip reset circuit is composed of a diode D5, a resistor R26, a diode D6 and a capacitor C29, the cathode of the diode D6 is connected with a key reset circuit, the main chip reset circuit is connected with the 7 pins of the main chip, the key reset circuit is composed of a restorer with the model number of IT-1210B, and the key reset circuit also resets the level signal of the power amplifier control circuit; the main chip debugging and burning chip circuit comprises a burning chip with the model number of SIP4P _1M27, wherein a 1 pin of the burning chip is connected with MCU _ VCC voltage through an inductor FB1, a 2 pin of a first lead is connected with the MCU _ VCC voltage through a resistor R31, a second lead is connected with a 46 pin of the main chip, a 3 pin of the first lead is connected with the MCU _ VCC voltage through a resistor R30, a second lead is connected with a 49 pin of the main chip, a 4 pin is grounded, a capacitor C27 is a filter capacitor at a power supply, a precise resistor R41 and a R45 of an AD sampling detection circuit form a voltage division network, the AD sampling detection circuit is connected with 12V voltage, and the AD sampling detection circuit is connected with an 11 pin of the main chip; the 16 pins of the main chip are connected with IO _ VCC voltage through resistors R47 and R27, the 17 pins are connected with IO _ VCC voltage through resistors R48 and R10, the 43 pins are connected with IO _ VCC voltage through resistors R34 and R32, the 42 pins are connected with IO _ VCC voltage through resistors R36 and R33, the 25 pins are connected with IO _ VCC voltage through resistors R49 and R35, and the capacitor C33 is a filter capacitor.

The 3G module comprises a chip CON2 and an external circuit, the model of the chip CON2 is U7500, the 1 pin of the chip CON2 is connected with an MIC key chip circuit through a 3G MIC chip circuit, the 3 pin is connected with the MIC key chip circuit through the 3G MIC chip circuit, the 5 pin is connected with the 8 pin of the chip U5 through a resistor R62, the 7 pin is connected with the 8 pin of the chip U5 through a resistor R64, thepins 33 and 22 are commonly connected with the 55 pin, 39 and 41 of the main chip, thepin 39 and 41 are connected with 3.4V voltage, a filter circuit is arranged at the voltage, thepin 2 is connected with 3.4V voltage, thepin 10 is connected with the 5 pin of the chip CON7 through a resistor R56, thepin 12 is connected with the 7 pin of the chip CON7, thepin 14 pin is connected with thepin 9 pin of the chip CON7, thepin 20 pin is connected with the 54 pin, thepin 22 pin is connected with the 33 pin of the chip CON2, thepin 24 is connected with 3.4V voltage, thepin 36 is connected with the chip U10, thepin 38 is connected with thechip 10 pin of the chip U2, the pin 52 is connected with 3.4V voltage, the 3G module power supply loop is composed of a chip U4, thepin 1 of the chip U4 is connected with thepin 37 of the main chip, thepin 2 is introduced with 5V voltage through an inductor FB3, thepins 4 and 5 output 3.4V voltage, the model of the chip U4 is MIC29302WU, and the model of the chip U5 is M62429P.

The power amplifier control circuit comprises a chip U7 and an external circuit, wherein the model of the chip U7 is LM4871LD, 2 and 3 pins of the chip U7 are grounded through a capacitor C68, a first lead of the 1 pin is connected with 5V voltage through a resistor R72 and an inductor FB11, a second lead is connected with a 38 pin of a main chip, a third lead is connected with a 4 pin of the restorer through a diode D10, a 6 pin is connected with 5V voltage through an inductor FB11, 7 and 9 pins are grounded, the 4 pin is sequentially connected with a 2 pin of the chip U5 through a resistor R70, a capacitor C69 and a capacitor C25, the 5 pin is connected with the 1 pin of the chip CON3 through an inductor FB12, and 8 pin is connected with a 2 pin of the chip CON3 through aninductor FB 13; the RS232 transceiver module comprises chip U6 and external circuit, the model of chip U6 is SP3232, connect electric capacity C63 between 1 and 2 pins of chip U6, connect electric capacity C65 between 4 and 5 pins, 2 pins are through electric capacity C64 ground connection, 6 pins are through electric capacity C66 ground connection, 15 pins ground connection, 16 pins connect IO _ VCC voltage through inductance FB10, 11 pins connect the 42 pins of main chip, 12 pins connect the 43 pins of main chip, 10 pins connect the 16 pins of main chip, 9 pins connect the 17 pins of main chip, RS232 transceiver module is used for connecting with RS232 serial port camera, be used for digital camera digital signal to send to main chip through 232 mode.

The display screen module comprises a screen display 3.3V control circuit, a screen display backlight control circuit and a screen display circuit, wherein a chip U8 of the screen display 3.3V control circuit introduces 5V voltage and outputs 3.3V voltage through a 5 pin; the screen display backlight control circuit comprises a chip U9 and an external circuit, wherein the model of the chip U9 is MP1488, a 6 pin of the chip U9 is connected with 5V voltage, a 1 pin is connected with a 2 pin of the chip CON4 through a diode D11, a 3 pin is connected with a 1 pin of the chip CON4 through a resistor R77, a 4 pin is connected with a 90 pin of the chip M2, the screen display circuit comprises the chip CON4 and the external circuit, the 4 pin of the chip CON4 is connected with 3.3V voltage, a 30 pin is connected with a 78 pin of the chip M2, a 31 pin is connected with 3.3V voltage through a resistor R75, a 37 pin is connected with a 27 pin of the chip M2, a 38 pin is connected with a 31 pin of the chip M2, a 39 pin is connected with a 26 pin of the chip M2, and a 40 pin is connected with a 30 pin of the chip M2.

The liquid crystal screen decoding module is composed of a chip M2 and an ARM debugging and burning chip, wherein the model of the chip M2 is MST701-LF, a 1 pin of the chip M2 is connected with a 15 pin of the chip U10, a 6 pin is connected with a 16 pin of the chip U10, a 14 pin is connected with a 3 pin of the chip CON6, a 16 pin is connected with a 9 pin of the chip CON6, a 17 pin is connected with a 3 pin of the chip U11, an 18 pin is connected with a 56 pin of a main chip, a 26 pin is connected with a 3 pin of the chip CON8, a 27 pin is connected with a 37 pin of the chip CON4, a 41 pin is connected with a 1 pin of thechip 8, a 42 pin is connected with a 2 pin of the chip CON8, a 45 pin is connected with a 40 pin of the main chip, a 46 pin is connected with a 36 pin of the main chip, 47 and 48 pins are grounded, and 49 and 50 pins are involved in 5V voltage; the ARM debugging and burning chip is composed of a chip CON5, IO _ VCC voltage is introduced into a 1 pin of the chip CON5 through an inductor FB15, an IO _ VCC voltage is connected to a first lead of a 2 pin through a resistor R98, an IO _ VCC voltage is connected to a second lead of the chip M2, an IO _ VCC voltage is connected to a first lead of a 3 pin through a resistor R97, a 92 pin of the chip M2 is connected to the second lead, and a 4 pin is grounded.

The USB 2.0 shunt module comprises a chip U10 and a peripheral circuit, wherein the model of the chip U10 is FE1_1s _ B _ SSOP28, 1 pin of the chip U10 is grounded, 2 and 3 pins are connected with a 12MHs crystal oscillator Y2, a 6 pin is connected with a 36 pin of the chip CON2, a 7 pin is connected with a 38 pin of the chip CON2, a 10 pin is connected with a 12 pin of the chip CON7, an 11 pin is connected with an 11 pin of the chip CON7, a 14 pin is grounded through a precision resistor R108, a 15 pin is connected with a 5 pin of the chip M2, a 16 pin is connected with a 6 pin of the chip M2, data information of the USB 2.0 shunt module is shared, video signal data of the chip M2 is shunted into two paths through a USB, one path is uploaded through a 3G module, and the other path passes through an external USB interface.

The USB power supply circuit introduces 5V voltage, the voltage is stabilized by a voltage stabilizing diode D14 and an inductor FB19, the USB _5V voltage is output, the SD card power supply control circuit comprises a chip U11 and peripheral circuits, 5V voltage is introduced into a 1 pin of the chip U11, voltage is input into a 4 pin of the chip CON6 through a 3 pin, the chip CON8 is a capacitive screen interface, the chip CON8 is FPC6P _0M5, and the chip CON9 is an MIC key interface.

Claims (9)

1. A vehicle event data recorder with a control circuit is characterized by comprising an MIC module, a 3G module power supply circuit, a display screen module, a liquid crystal screen decoding module, a main power supply 5V circuit, an ACC power-on detection circuit, a main chip circuit, a power amplifier control circuit, an audio control module, an RS232 transceiver module, a USB 2.0 current divider module and an SD card power supply control circuit, wherein video data collected by a camera is transmitted to the main chip through the RS232 transceiver module, the main chip transmits the data to the display screen module through the liquid crystal screen decoding module, real-time video is displayed on the display screen, meanwhile, the main chip stores the video data in the SD card for storing vehicle event data of a user, the 3G module is used for remotely checking the video data of the vehicle event data recorder through an APP, the user is greatly facilitated to check the vehicle event data of the user, the power amplifier control circuit is used for playing the sound sent by the main chip, the audio control module is used for adjusting the volume and the sound channel to be suitable for a user to listen.

2. The automobile data recorder with the control circuit as claimed in claim 1, wherein the power circuit is powered by an original vehicle power system to 12V, and then is powered down to 5V through a chip U1, 8 pins of the chip U1 are connected to 12V, and 3 and 6 pins of an indirect resistor R3,7 pins of the indirect resistor R6 are connected to 35 pins of a main chip; the MCU power supply circuit is composed of a power supply chip U3 and a diode D8, the model of the power supply chip U3 is NCV8664, a pin 1 of the power supply chip U3 is connected with 12V voltage, a pin 2 is grounded, a pin 3 outputs MCU _ VCC voltage, and a pin is provided with a decoupling capacitor C35 and a capacitor EC 3; MCU pull-up power supply circuit comprises triode Q2 and MOS pipe Q1, triode Q2's 1 pin meets the 23 pins of main chip, 2 pin ground connections, 3 pins meet MOS pipe Q1's 1 pin, MOS pipe Q1's 3 pins connect IO _ VCC, 2 pins connect MCU _ VCC.

3. The automobile data recorder with the control circuit is characterized in that the main chip circuit is composed of a main chip and peripheral circuits, the model of the main chip is STM32F103RCT6, 5 and 6 pins of the main chip are connected with an 8MHz crystal oscillator circuit, the ACC power-on detection circuit comprises a triode Q3, a first lead of a 3 pin of the triode Q3 is connected with MCU _ VCC voltage, a second lead of the triode Q3 is connected with a 2 pin of the main chip, the 2 pin is grounded, the 1 pin is connected with an ACC node through a diode D4, and the main chip filter circuit is composed of capacitors C16, C17, C18, C19, C20, C21 and C22 and provides a clean power supply for the main chip; the main chip reset circuit is composed of a diode D5, a resistor R26, a diode D6 and a capacitor C29, the cathode of the diode D6 is connected with a key reset circuit, the main chip reset circuit is connected with the 7 pins of the main chip, the key reset circuit is composed of a restorer with the model number of IT-1210B, and the key reset circuit also resets the level signal of the power amplifier control circuit; the main chip debugging and burning chip circuit comprises a burning chip with the model number of SIP4P _1M27, wherein a 1 pin of the burning chip is connected with MCU _ VCC voltage through an inductor FB1, a 2 pin of a first lead is connected with the MCU _ VCC voltage through a resistor R31, a second lead is connected with a 46 pin of the main chip, a 3 pin of the first lead is connected with the MCU _ VCC voltage through a resistor R30, a second lead is connected with a 49 pin of the main chip, a 4 pin is grounded, a capacitor C27 is a filter capacitor at a power supply, a precise resistor R41 and a R45 of an AD sampling detection circuit form a voltage division network, the AD sampling detection circuit is connected with 12V voltage, and the AD sampling detection circuit is connected with an 11 pin of the main chip; the 16 pins of the main chip are connected with IO _ VCC voltage through resistors R47 and R27, the 17 pins are connected with IO _ VCC voltage through resistors R48 and R10, the 43 pins are connected with IO _ VCC voltage through resistors R34 and R32, the 42 pins are connected with IO _ VCC voltage through resistors R36 and R33, the 25 pins are connected with IO _ VCC voltage through resistors R49 and R35, and the capacitor C33 is a filter capacitor.

4. The driving recorder with control circuit as claimed in claim 3, wherein the 3G module comprises a chip CON2 and an external circuit, the chip CON2 is U7500, the 1 pin of the chip CON2 is connected to MIC button chip circuit through 3G MIC chip circuit, the 3 pin is connected to MIC button chip circuit through 3G MIC chip circuit, the 5 pin is connected to the 8 pin of the chip U5 through a resistor R62, the 7 pin is connected to the 8 pin of the chip U5 through a resistor R64, the pins 33 and 22 are connected to the 55 pin, 39 and 41 pin of the main chip together and are connected to 3.4V voltage and a filter circuit is set at the voltage, the 2 pin is connected to 3.4V voltage, the 10 pin is connected to the 5 pin of the chip CON7 through a resistor R56, the 12 pin is connected to the 7 pin of the chip CON7, the 14 pin is connected to the 9 pin of the chip CON7, the 20 pin is connected to the 54 pin, the 22 pin is connected to the 33 pin of the main chip 2, the 24 pin is connected with 3.4V voltage, the 36 pin is connected with the 6 pin of a chip U10, the 38 pin is connected with the 7 pin of a chip U10, the 52 pin is connected with 3.4V voltage, the 3G module power supply loop is composed of a chip U4, the 1 pin of the chip U4 is connected with the 37 pin of a main chip, the 2 pin is introduced with 5V voltage through an inductor FB3, the 4 and 5 pins output 3.4V voltage, the type of the chip U4 is MIC29302WU, and the type of the chip U5 is M62429P.

5. The automobile data recorder with the control circuit as claimed in claim 4, wherein the power amplifier control circuit is composed of a chip U7 and an external circuit, the model of the chip U7 is LM4871LD, pins 2 and 3 of the chip U7 are grounded through a capacitor C68, a first lead of pin 1 is connected with 5V voltage through a resistor R72 and an inductor FB11, a second lead is connected with a pin 38 of a main chip, a third lead is connected with a pin 4 of the restorer through a diode D10, a pin 6 is connected with 5V voltage through an inductor FB11, pins 7 and 9 are grounded, a pin 4 is sequentially connected with a pin 2 of the chip U5 through a resistor R70, a capacitor C69 and a capacitor C25, a pin 5 is connected with a pin 1 of a chip CON3 through an inductor FB12, and a pin 8 is connected with a pin 2 of a chip CON3 through an inductor FB 13; the RS232 transceiver module comprises chip U6 and external circuit, the model of chip U6 is SP3232, connect electric capacity C63 between 1 and 2 pins of chip U6, connect electric capacity C65 between 4 and 5 pins, 2 pins are through electric capacity C64 ground connection, 6 pins are through electric capacity C66 ground connection, 15 pins ground connection, 16 pins connect IO _ VCC voltage through inductance FB10, 11 pins connect the 42 pins of main chip, 12 pins connect the 43 pins of main chip, 10 pins connect the 16 pins of main chip, 9 pins connect the 17 pins of main chip, RS232 transceiver module is used for connecting with RS232 serial port camera, be used for digital camera digital signal to send to main chip through 232 mode.

6. The automobile data recorder with the control circuit according to claim 4, wherein the display screen module comprises a screen display 3.3V control circuit, a screen display backlight control circuit and a screen display circuit, and a chip U8 of the screen display 3.3V control circuit outputs 3.3V voltage through a 5 pin after 5V voltage is introduced; the screen display backlight control circuit comprises a chip U9 and an external circuit, wherein the model of the chip U9 is MP1488, a 6 pin of the chip U9 is connected with 5V voltage, a 1 pin is connected with a 2 pin of the chip CON4 through a diode D11, a 3 pin is connected with a 1 pin of the chip CON4 through a resistor R77, a 4 pin is connected with a 90 pin of the chip M2, the screen display circuit comprises the chip CON4 and the external circuit, the 4 pin of the chip CON4 is connected with 3.3V voltage, a 30 pin is connected with a 78 pin of the chip M2, a 31 pin is connected with 3.3V voltage through a resistor R75, a 37 pin is connected with a 27 pin of the chip M2, a 38 pin is connected with a 31 pin of the chip M2, a 39 pin is connected with a 26 pin of the chip M2, and a 40 pin is connected with a 30 pin of the chip M2.

7. The automobile data recorder with the control circuit as claimed in claim 6, wherein the lcd decoding module is composed of a M2 chip and an ARM debug burn chip, the M2 chip is MST701-LF, 1 pin of the M2 chip is connected to 15 pins of the U10 chip, 6 pins are connected to 16 pins of the U10 chip, 14 pins are connected to 3 pins of the CON6 chip, 16 pins are connected to 9 pins of the CON6 chip, 17 pins are connected to 3 pins of the U11 chip, 18 pins are connected to 56 pins of the main chip, 26 pins are connected to 3 pins of the CON8 chip, 27 pins are connected to 37 pins and 41 pins of the CON4 chip 8 chip, 42 pins are connected to 2 pins of the CON8 chip, 45 pins are connected to 40 pins of the main chip, 46 pins are connected to 36 pins, 47 pins and 48 pins of the main chip, and 49 and 50 pins are connected to 5V voltage; the ARM debugging and burning chip is composed of a chip CON5, IO _ VCC voltage is introduced into a 1 pin of the chip CON5 through an inductor FB15, an IO _ VCC voltage is connected to a first lead of a 2 pin through a resistor R98, an IO _ VCC voltage is connected to a second lead of the chip M2, an IO _ VCC voltage is connected to a first lead of a 3 pin through a resistor R97, a 92 pin of the chip M2 is connected to the second lead, and a 4 pin is grounded.

8. The tachograph of claim 7, wherein the USB 2.0 shunt module comprises a chip U10 and peripheral circuits, the model of the chip U10 is FE1_1s _ B _ SSOP28, the 1 pin of the chip U10 is connected to ground, the 2 and 3 pins are connected to Y2 of a 12MHs crystal oscillator, the 6 pin is connected to 36 pin of the chip CON2, the 7 pin is connected to 38 pin of the chip CON2, the 10 pin is connected to 12 pin of the chip CON7, the 11 pin is connected to 11 pin of the chip CON7, the 14 pin is connected to ground through a precision resistor R108, the 15 pin is connected to 5 pin of the chip M2, the 16 pin is connected to 6 pin of the chip M2, the data information of the USB 2.0 shunt module is shared, the video signal data of the chip M2 is shunted into two paths through USB, one path is uploaded through a 3G module, and the other path is connected to an external USB interface.

9. The automobile data recorder with the control circuit as claimed in claim 8, wherein the USB power supply circuit introduces 5V voltage, and outputs USB _5V voltage after voltage stabilization by the zener diode D14 and the inductor FB19, the SD card power supply control circuit includes a chip U11 and peripheral circuits, the chip U11 introduces 5V voltage at pin 1, the chip CON8 is a capacitive screen interface, the chip CON8 is FPC6P _0M5, and the chip CON9 is a MIC key interface, and the chip CON6 inputs voltage at pin 4.

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