Summary of the invention
In view of this; the present invention is intended to the detector proposing the leakage of a kind of Real-Time Monitoring plunger pump packing; can the leakage of Real-Time Monitoring plunger pump; and provide warning in real time; simultaneously can according to need of production termination of pumping interlock protection; and there is ABAP Adapter lightning protection function, allow many groups equipment to be worked by bus mode simultaneously and data communication interference can not be produced.
For achieving the above object, technological scheme of the present invention is achieved in that
The detector that a kind of Real-Time Monitoring plunger pump packing leaks, comprise System Control Center unit, external power supply protection circuit unit, step-down chip unit, hardware watchdog circuit unit, sensor power control circuit unit, water leakage monitoring sensor unit, RS485 communication unit and alarm unit, external power supply accesses the input end of described external power supply protection circuit unit, the output terminal of described external power supply protection circuit unit is respectively for the described step-down chip unit of electrical connection and described sensor power control circuit unit, described step-down chip unit is powered respectively and is outputted to described hardware watchdog circuit unit, described System Control Center unit and described RS485 communication unit, the output terminal of described hardware watchdog circuit unit accesses described System Control Center unit, described RS485 communication unit and described alarm unit are connected with the conducting of described System Control Center unit two-way signaling respectively, the control signal of described System Control Center unit exports and connects described sensor power control circuit unit, described sensor power control circuit unit connects described water leakage monitoring sensor unit, the signal of described water leakage monitoring sensor unit exports and connects described System Control Center unit.
Further, described System Control Center unit is STM32F103VCT6 single-chip microcomputer and peripheral circuit.
Further, described external power supply protection circuit unit comprises common mode inductance L5, high-voltage capacitance C3, 3rd piezoresistance R3, first piezoresistance R1 and the 12 piezoresistance R12, first anti-thunder tube, second anti-thunder tube, 3rd anti-thunder tube, first self-recoverage insurance F1, π shape diode protection array and the tenth electric capacity C10, the input end of described external power supply accesses described common mode inductance L5, between the output terminal of described common mode inductance L5 successively and be connected to described high-voltage capacitance C3, the described first piezoresistance R1 of described 3rd piezoresistance R3 and serial connection and described 12 piezoresistance R12, described first anti-thunder tube is connected to the upper end of described first piezoresistance R1, described second anti-thunder tube is connected between described first piezoresistance R1 and described 12 piezoresistance R12, described 3rd anti-thunder tube is connected to the lower end of described 12 piezoresistance R12, described first piezoresistance R1 exports and connects described first self-recoverage insurance F1, described first self-recoverage insurance F1 exports and is connected to described π shape diode protection array.
Further, described π shape diode protection array comprises a π shape diode D1, the 4th π shape diode D4 and the 14 π shape diode D14, described 4th π shape diode D4 and described 14 π shape diode D14 in the same way and connect, a described π shape diode D1 is serially connected between described 4th π shape diode D4 and described 14 π shape diode D14, and the positive pole of a described π shape diode D1 connects the output terminal of described first self-recoverage insurance F1.
Further, described step-down chip unit is TPS5430 switching type power supply chip and peripheral circuit.
Further, described hardware watchdog circuit unit is SP706 WatchDog Timer and peripheral circuit.
Further, described sensor power control circuit unit comprises RC eliminator, voltage follower, first triode Q1, 3rd self-recoverage insurance F3, 18 transfer resistance R18, 21 transfer resistance R21 and signal detector, the control signal of described System Control Center unit exports described RC eliminator to, described voltage follower is accessed after the filtering of described RC eliminator, the collector electrode of the described first triode Q1 of output terminal access of described voltage follower, the base stage of described first triode Q1 is connected one end of described water leakage monitoring sensor unit with emitter circuit, the described 3rd self-recoverage insurance F3 of described water leakage monitoring sensor unit the other end access, the output terminal of described 3rd self-recoverage insurance F3 is serially connected with described 18 transfer resistance R18 and described 21 transfer resistance R21, the input end of described signal detector is connected between described 18 transfer resistance R18 and described 21 transfer resistance R21, the output terminal of described signal detector is connected to described System Control Center unit.
Further, described voltage follower comprises LM358 amplifier, and described signal detector comprises LM321D amplifier.
Further, described RS485 communication unit is MAX3485 chip and peripheral protective circuit.
Relative to prior art, the detector that Real-Time Monitoring plunger pump packing of the present invention leaks has following advantage:
System Control Center unit of the present invention is made up of STM32F103VCT6 single-chip microcomputer and peripheral circuit, control signal can be exported to sensor power control circuit unit, and the live signal that leaks that water leakage monitoring sensor unit monitors can be received, System Control Center unit can be analyzed the live signal that leaks and whether exceed setting threshold value, once find to exceed threshold value, can with RS485 communication unit communication, the instruction of stop plunger pump is sent by RS485 communication unit, send warning actuating signal to alarm unit simultaneously, realize the leakage of Real-Time Monitoring plunger pump, and provide warning in real time, simultaneously can according to the function of need of production termination of pumping interlock protection, allow many groups equipment to be worked by bus mode simultaneously and data communication interference can not be produced, and external power supply protection circuit unit can anti-lightning strike surge, there is ABAP Adapter lightning protection function.
Embodiment
It should be noted that, when not conflicting, the embodiment in the present invention and the feature in embodiment can combine mutually.
In describing the invention, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end ", " interior ", orientation or the position relationship of the instruction such as " outward " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore limitation of the present invention can not be interpreted as.In addition, term " first ", " second " etc. only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristics.Thus, one or more these features can be expressed or impliedly be comprised to the feature being limited with " first ", " second " etc.In describing the invention, except as otherwise noted, the implication of " multiple " is two or more.
In describing the invention, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, above-mentioned term concrete meaning in the present invention can be understood by concrete condition.
Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.
As shown in Figure 1, the invention provides the detector that a kind of Real-Time Monitoring plunger pump packing leaks, comprise System Control Center unit 1, external power supply protection circuit unit 2, step-down chip unit 3, hardware watchdog circuit unit 4, sensor power control circuit unit 5, water leakage monitoring sensor unit 6, RS485 communication unit 7 and alarm unit 8, external power supply accesses the input end of described external power supply protection circuit unit 2, the output terminal of described external power supply protection circuit unit 2 is respectively for the described step-down chip unit 3 of electrical connection and described sensor power control circuit unit 5, described step-down chip unit 3 is powered respectively and is outputted to described hardware watchdog circuit unit 4, described System Control Center unit 1 and described RS485 communication unit 7, the output terminal of described hardware watchdog circuit unit 4 accesses described System Control Center unit 1, described RS485 communication unit 7 and described alarm unit 8 are connected with the conducting of described System Control Center unit 1 two-way signaling respectively, the control signal of described System Control Center unit 1 exports and connects described sensor power control circuit unit 5, described sensor power control circuit unit 5 connects described water leakage monitoring sensor unit 6, the signal of described water leakage monitoring sensor unit 6 exports and connects described System Control Center unit 1.
Described System Control Center unit 1 is STM32F103VCT6 single-chip microcomputer and peripheral circuit, 32 ARM microcontroller that STM32F1 series belongs to, its kernel is Cortex-M3, the highest 72MHz frequency of okperation, integrated chip timer, has RTC, CAN, ADC, DAC, SPI, I2C, USB and UART multiple interfaces function.The RS485 communication unit 7 of the present embodiment is connected with the UART interface of STM32F103VCT6 single-chip microcomputer, for communication function; The RTC interface of STM32F103VCT6 single-chip microcomputer is real-time clock, for recording warning time of origin; DAC interface is used for providing adjustable voltage for sensor power control circuit unit 5; ADC interface is for detecting the output signal of water leakage monitoring sensor unit 6; I/O interface is used for the digit chip signal transacting of control relay, LED, hardware watchdog circuit unit 4.
As shown in Figure 2, described external power supply protection circuit unit 2 comprises common mode inductance L5, high-voltage capacitance C3, 3rd piezoresistance R3, first piezoresistance R1 and the 12 piezoresistance R12, first anti-thunder tube 21, second anti-thunder tube 22, 3rd anti-thunder tube 23, first self-recoverage insurance F1, π shape diode protection array 24 and the tenth electric capacity C10, the input end of described external power supply accesses described common mode inductance L5, between the output terminal of described common mode inductance L5 successively and be connected to described high-voltage capacitance C3, the described first piezoresistance R1 of described 3rd piezoresistance R3 and serial connection and described 12 piezoresistance R12, described first anti-thunder tube 21 is connected to the upper end of described first piezoresistance R1, described second anti-thunder tube 22 is connected between described first piezoresistance R1 and described 12 piezoresistance R12, described 3rd anti-thunder tube 23 is connected to the lower end of described 12 piezoresistance R12, described first piezoresistance R1 exports and connects described first self-recoverage insurance F1, described first self-recoverage insurance F1 exports and is connected to described π shape diode protection array 24.The external power supply of the present embodiment is 24V, through common mode inductance L5 filtering part common mode interference signal, high-voltage capacitance C3 filters strong voltage waves AC, first anti-thunder tube 21, second anti-thunder tube 22 and the 3rd anti-thunder tube 23 can bear differential mode and the common mode disturbances of big current, 3rd piezoresistance R3, first piezoresistance R1 and the 12 piezoresistance R12 is just being responsible for filtering, DM EMI signal on negative power line, π shape diode protection array 24 is sent into via the first self-recoverage insurance F1, π shape diode protection array 24 plays anti-reverse power connection, supply voltage is too high, remove the function of DM EMI, it is the last guarantee of whole plate power supply.
Described π shape diode protection array 24 comprises a π shape diode D1, the 4th π shape diode D4 and the 14 π shape diode D14, described 4th π shape diode D4 and described 14 π shape diode D14 in the same way and connect, a described π shape diode D1 is serially connected between described 4th π shape diode D4 and described 14 π shape diode D14, and the positive pole of a described π shape diode D1 connects the output terminal of described first self-recoverage insurance F1.
As shown in Figure 3, described step-down chip unit 3 is TPS5430 switching type power supply chip 31 and peripheral circuit, TPS5430 switching type power supply chip 31 exports 3V voltage, and output voltage is described hardware watchdog circuit unit 4, described System Control Center unit 1 and described RS485 communication unit 7 are powered.
As shown in Figure 4, described hardware watchdog circuit unit 4 is SP706 WatchDog Timer 41 and peripheral circuit, SP706 WatchDog Timer 41 comprises a WatchDog Timer, a uP reseting module, a failed comparator of power supply, and a hand reset load module, it is independently WatchDog Timer, spilling cycle 1.6s, built-in Vcc disturbs suppress current, is applicable to 3.3V environment.
As shown in Figure 5, described sensor power control circuit unit 5 comprises RC eliminator 51, voltage follower 52, first triode Q1, 3rd self-recoverage insurance F3, 18 transfer resistance R18, 21 transfer resistance R21 and signal detector 53, the control signal of described System Control Center unit 1 exports described RC eliminator 51 to, described voltage follower 52 is accessed after the filtering of described RC eliminator 51, the collector electrode of the described first triode Q1 of output terminal access of described voltage follower 52, the base stage of described first triode Q1 is connected one end of described water leakage monitoring sensor unit 6 with emitter circuit, the described 3rd self-recoverage insurance F3 of described water leakage monitoring sensor unit 6 the other end access, the output terminal of described 3rd self-recoverage insurance F3 is serially connected with described 18 transfer resistance R18 and described 21 transfer resistance R21, the input end of described signal detector 53 is connected between described 18 transfer resistance R18 and described 21 transfer resistance R21, the output terminal of described signal detector 53 is connected to described System Control Center unit 1.By the DAC interface output voltage of STM32F103VCT6 single-chip microcomputer, LM358 amplifier 521 makees voltage follower 52, play the effect increasing driving current, first triode Q1 plays on-off action, for water leakage monitoring sensor unit 6 power supply control, 3rd self-recoverage insurance F3 is that 30mA can recover self-protective, protection water leakage monitoring sensor unit 6, 18 transfer resistance R18 and the 21 transfer resistance R21 can convert the current signal of water leakage monitoring sensor unit 6 to voltage signal, LM321D amplifier 531 makees signal detector 53, for detecting the signal that water leakage monitoring sensor unit 6 exports, and pass to the ADC interface of STM32F103VCT6 single-chip microcomputer.
As shown in Figure 6, described RS485 communication unit 7 is MAX3485 chip 71 and peripheral protective circuit.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.