CN110988654A

Movatterモバイル変換

Info

Publication number: CN110988654A
Application number: CN201911260188.2A
Authority: CN
Inventors: 蔡振; 党代表
Original assignee: Suzhou Yuntaili Automation Equipment Co ltd
Current assignee: Suzhou Yuntaili Automation Equipment Co ltd
Priority date: 2019-12-10
Filing date: 2019-12-10
Publication date: 2020-04-10

Abstract

The invention provides a PCBA program burning and impedance testing device and method with simple structure, complete functions, low cost and high operation efficiency. The device comprises an Industrial Personal Computer (IPC), a measurement control module, a burning module, a signal switching module (16) and a switch power supply module (17); the method comprises the following steps: and placing the PCBA to be tested into the test carrier, detecting that the PCBA to be tested is placed in place, performing open-short circuit test, controlling the second power supply module to supply power to the signal switching module when all detection points are open circuits meeting conditions, performing burning operation through the burning module, performing burning result test through the second MCU after normal burning is completed, and finally finishing the test. The invention is used in the field of PCBA test.

Description

Device and method for PCBA program burning and impedance testing

Technical Field

The invention relates to the field of PCBA (printed circuit board assembly) testing, in particular to a PCBA program burning and impedance testing device and method.

Background

With the increasing update of technology, the integration level of electronic products is higher and higher, and the functions are more and more powerful, and almost most products have microprocessors, and the microprocessors complete the established functions through the design, update and burning of programs. At the moment, the PCBA intelligent test terminal needs to be optimized and integrated so as to meet new test requirements. Wherein, whether the open-short circuit test and the program burning of the ICT (on-line electrical performance test) are successful is a priority test item, so that the designed PCBA can be quickly detected and verified in time for specific functions. Therefore, it is desirable to design a device that combines these two functions to reduce cost, improve efficiency and reliability.

In the existing intelligent test device for the PCBA in the market, an ICT test and an FCT test (electronic circuit functionality test) are basically separated into two independent test devices. The ICT test is mainly used for detecting the open and short circuit of the PCBA and the welding condition of all components. The open-short circuit detection is particularly important, and is related to whether the PCBA can be normally powered on. The measurement of open and short circuit is mainly determined by measuring the resistance value of the corresponding test point. The FCT test mainly detects whether the function of the PCBA is normal or not, and measures and obtains functional parameters of each component by supplying power to the PCBA, wherein the program burning of the microprocessor is the most basic detection flow.

Currently, the ICT test and the FCT test for the PCBA mainly have the following disadvantages:

1. the FCT and ICT tests are relatively independent, and a test device integrating two functions is lacked;

2. the test time of each independent function test is long, and the requirement of rapid timely verification test on partial functions cannot be met;

3. the operators need to be trained complexly before going on duty, and the requirements on the operators are high, so that the operators are difficult to realize quick skilled operation and expand the production scale quickly;

4. the method has the advantages that a certain test standard does not exist, the technical proficiency of operators is completely relied on, the operation results of different operators are greatly different, and the test reliability is not high;

5. the test efficiency is low, and the consumption cost is high.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a device and a method for PCBA program burning and impedance testing, which have the advantages of simple structure, complete functions, low cost and high operation efficiency.

The technical scheme adopted by the PCBA program burning and impedance testing device is as follows: the invention comprises an industrial personal computer, a control computer and a control module, wherein the industrial personal computer is used for detecting and controlling a program burning process of the PCBA and a test process of impedance;

the measurement control module is used for providing power supply control, selecting and measuring an open/short circuit detection point of the PCBA, carrying out impedance calculation, communicating with an industrial personal computer and a peripheral upper computer, and providing power for the signal switching module;

the burning module is used for burning programs on the PCBA;

the signal switching module is used for leading out a detection result signal of the selected detection point on the PCBA;

and the switching power supply module is used for providing a direct current power supply for the whole device.

According to the scheme, the impedance of each set detection point of the PCBA can be detected through the measurement control module, the open short circuit test result is judged, and the short circuit between the point positions can be quickly positioned according to the detection point positions, so that the most direct guidance is provided for subsequent overhaul and maintenance, the timeliness is greatly improved, and the operation difficulty is reduced; the program burning of the PCBA is realized through the burning module, burning self-checking is carried out through the measurement control module after burning is finished, normal execution of burning is guaranteed through detection of burning results of the burned PCBA, when the self-checking fails, testing can be stopped timely, the results can be uploaded to an industrial personal computer, and then the results are transmitted to a peripheral upper computer, so that a basis is provided for quick fault finding; the signal switching module can realize the quick connection between the device and the PCBA to be tested, and the safety and the reliability of the connection are ensured; in addition, the device has a simple structure, realizes the combination of the FCT and ICT tests of the PCBA, greatly improves the test efficiency, integrates the FCT and ICT tests and other test functions on one device, ensures the smooth operation of the test process through the cooperation of the industrial personal computer and the test control module, and relatively reduces the cost.

Further, the measurement control module comprises a digital I/O device, a first electric control board, a second electric control board and a pneumatic module, the digital I/O device uploads collected information to the first electric control board, the first electric control board is respectively connected with the second electric control board, the pneumatic module, the burning module and the signal transfer module through electric signals, and the second electric control board is respectively connected with the pneumatic module, the industrial personal computer and the signal transfer module through communication.

Still further, the first electronic control board comprises an I/O control module and an I/O power supply module, and the digital I/O device controls and selects an I/O port of the I/O control module, and supplies power to the selected I/O port through the I/O power supply module. Therefore, the I/O control module is connected with the digital I/O device, receives an I/O configuration signal from the digital I/O device, supplies power to the configured I/O port through the I/O power supply module, and realizes the definition of the I/O port and the connection communication with the PCBA.

Still further, the second electric control board comprises a second MCU, a second power supply module, an I/O read-write module, a constant current module, a relay module, an ADC module and a UART communication module, the second power supply module controls power supply of the second electric control board, the I/O read-write module is in communication connection with the I/O control module, the constant current module provides a constant current source and a constant voltage source for the second electric control board, the relay module selects detection points of PCBA open short circuit, the ADC module amplifies detection results of the detection points of PCBA open short circuit, and the UART communication module is in communication with the industrial personal computer and a peripheral upper computer. Therefore, through the matched arrangement of the modules, the detection of the open circuit and the short circuit of the PCBA can be realized, the burning and the self-checking after burning of the PCBA are realized, the FCT and the ICT of the PCBA are combined into a whole, the cost of the whole device is relatively reduced, the testing speed of the PCBA is also improved, and the multifunctional testing and burning operation can be realized on the device in one step.

Still further, the pneumatic module comprises a pneumatic substrate, an electromagnetic valve, a sensor, a counter and an emergency switch, and the electromagnetic valve, the sensor, the counter and the emergency switch are all in electric signal connection with the pneumatic substrate. Therefore, through the matching among all parts of the pneumatic module, the functions of open-short circuit testing, program burning and the like of the whole device are ensured to be automated, the influence of human factors is greatly reduced, the testing quality is ensured, and the testing efficiency and the automation degree are improved.

In addition, the burning module comprises a burner and a HUB. Therefore, through the cooperation of the burner and the HUB, the burner burns the PCBA, and the HUB is a burner concentrator and provides data transmission and resource integration for burning.

The signal switching module is a dual-channel module, and is connected with the PCBA to be tested through the probe. Therefore, the probe is used as a connecting medium of the signal transfer module and the PCBA to be tested, convenience and reliability of operation are achieved, and the position of the set detection point at any position can be tested through the probe.

The switching power supply module provides two 12VDC-36A-432W direct current power supplies. Therefore, the power supply capacity of the device is guaranteed through the arrangement of the two direct current power supplies, and the problem of testing caused by insufficient electric energy is avoided.

The method for carrying out PCBA program burning and impedance testing by using the device comprises the following steps:

a. the first electric control board provides corresponding power supply and control signals for the device, places the PCBA to be tested into the test carrier and detects that the PCBA to be tested is placed in place;

b. starting a test, wherein the second MCU drives the test carrier to test through the pneumatic module;

c. after the test carrier starts to test, firstly, performing open-short circuit test, when all the detection points are open circuits meeting the conditions, controlling a second power supply module to supply power to the signal switching module by a second MCU, continuing the test and turning to the step e, otherwise, turning to the step d;

d. the open short circuit test fails, the failure result is uploaded to a peripheral upper computer and displayed, the second MCU controls the second power supply module to not supply power to the signal switching module and detects the impedance of the detection point which fails in the test, the impedance value is measured, then the test is quitted, the test carrier recovers the initial test state, and the PCBA to be tested returns to the maintenance;

e. after the open short circuit test is normally finished, the second MCU controls the second power supply module to power on the signal transfer module for subsequent tests;

f. the burning operation is carried out through the burning module, after the normal burning is finished, the second MCU carries out burning result testing, when the burning result is detected to be correct, the burning result is uploaded to a peripheral upper computer and displayed, finally the testing is quitted, the test is returned to the initial state of the testing, and if not, the step g is carried out;

g. when the burning error is detected, the burning failure is judged, the result is uploaded to a peripheral upper computer, the test is quitted, the test initial state is returned, and finally the PCBA with the burning failure is returned to be maintained.

Above-mentioned scheme is visible, through the cooperation of second automatically controlled board and first automatically controlled board, set up the check point that utilizes the probe to realize detecting on PCBA, can realize opening the short circuit detection to PCBA fast, burn the operation through burning record module and then can accomplish the operation of burning record to PCBA, and burn the self-checking, guarantee to burn the quality, and upload the result to outlying host computer, it has fused ICT and FCT two most important parts, and provide accurate reliable intelligent test, in order to reach the purpose of intelligent quick test, satisfy the increasingly high requirement of electronic product integration intellectuality, the development of circuit board testing industry has been complied with, the manpower has also been saved, financial resources, cost such as time, and the efficiency of software testing and test convenience have been improved greatly.

Further, in step f, the process of the second MCU performing the burning result test is as follows: the peripheral upper computer controls the digital I/O equipment to carry out starting operation on the PCBA, a volume increasing and decreasing instruction is sent out after the PCBA is started, then the level change of the corresponding input port of the digital I/O equipment is detected, and when the level change is consistent with the volume increasing and decreasing instruction, the burning is indicated to be finished; otherwise, indicating that the burning fails.

The scheme can be seen that the burning result is tested, the burning quality is guaranteed, the result is simple and convenient to detect and convenient to operate, a better detection effect is achieved, and the quality of a burning product is further guaranteed.

Drawings

FIG. 1 is a block diagram of the principle architecture of the present invention;

FIG. 2 is a circuit schematic of the second MCU;

FIG. 3 is a circuit schematic of a first portion of the I/O control module;

FIG. 4 is a circuit schematic of a second portion of the I/O control module;

FIG. 5 is a circuit schematic of a third portion of the I/O control module;

FIG. 6 is a functional block diagram of the I/O power supply module;

FIG. 7 is a circuit schematic of the second power supply module;

FIG. 8 is a circuit schematic of the I/O read/write module;

fig. 9 is a functional block diagram of the constant current module;

FIG. 10 is a circuit schematic of the ADC module;

FIG. 11 is a circuit schematic of the relay module;

fig. 12 is a circuit schematic of the switching power supply module;

FIG. 13 is a circuit schematic of a first portion of the signal transfer module;

FIG. 14 is a circuit schematic of a second portion of the signal transfer module;

FIG. 15 is a circuit schematic of a third portion of the signal transfer module;

FIG. 16 is a schematic circuit diagram of the switching of the burst signals of the burner.

Detailed Description

As shown in figure 1, the device comprises an industrial personal computer IPC for detecting and controlling a program burning process and an impedance testing process of the PCBA, wherein the model of the industrial personal computer IPC is IPC-610 MB-L; the measurement control module is used for providing power supply control, selecting and measuring an open-short circuit detection point of the PCBA, carrying out impedance calculation, communicating with an Industrial Personal Computer (IPC) and a peripheral upper computer and providing power for the signal switching module; the burning module is used for burning programs on the PCBA; thesignal switching module 16 is used for leading out a detection result signal of a selected detection point on the PCBA; and a switchingpower supply module 17 for supplying a direct current power supply to the entire apparatus.

The method for carrying out the PCBA program burning and the impedance test by utilizing the PCBA program burning and impedance test device comprises the following steps:

a. the firstelectric control board 1 provides corresponding power supply and control signals for the device, places the PCBA to be tested into the test carrier and detects that the PCBA to be tested is placed in place;

In the step f, the process of the second MCU for testing the burning result is as follows: the peripheral upper computer controls the digital I/O equipment NI6501 to start the PCBA, sends out a volume increase and decrease instruction after the PCBA is started, then detects the level change of the corresponding input port of the digital I/O equipment NI6501, and when the level change is consistent with the volume increase and decrease instruction, the burning is finished; otherwise, indicating that the burning fails.

Compared with the prior art, the method combines partial functions of the ICT with the FCT, and can finish rapid automatic test on specific functions or special needs. This ensures that the product under test is not burned out when it is subjected to the FCT test directly.

The invention adopts an automatic testing technology, excludes most human factors, obtains more accurate data, and can quickly position which point positions are short-circuited according to the detection point positions. In the whole testing process, the PCBA to be tested is only required to be placed at the corresponding position on the testing carrier, the start key is pressed, the testing carrier carries out open-short circuit testing/burning completion self-checking according to a set testing flow, if short circuit is detected during the period, the upper computer feeds back which point positions are in error and the measured impedance value, and the follow-up testing is stopped after the open-short circuit testing is completed. And if the whole test is normal, finally feeding back a test result. In addition, the test device can be designed to test two PCBA products at the same time so as to achieve the purpose of rapidly detecting the set function.

The invention has the following advantages:

1. the open-short circuit test and the burning can be simultaneously carried out;

2. the method can meet the requirement of quickly detecting the specific functions of the designed product;

3. the automatic test greatly reduces the dependence on manpower;

4. the reliability of the test is high;

5. the detection point position of the short circuit of the product can be quickly positioned, the problem searching time is reduced, and the efficiency is improved;

6. high timeliness and simple operation.

Claims

Translated fromChinese

1.一种PCBA程序烧录与阻抗测试的装置，其特征在于：该装置包括1. a device of PCBA program burning and impedance test, is characterized in that: this device comprises

工控机(IPC)，用于对PCBA的程序烧录过程和阻抗的测试过程进行检测和控制；Industrial Personal Computer (IPC), used to detect and control the programming process of PCBA and the testing process of impedance;

测量控制模块，用于提供电源供应控制，对PCBA开短路检测点的选择和测量，进行阻抗计算，与工控机(IPC)及外围的上位机通信，并为信号转接模块提供电源；The measurement control module is used to provide power supply control, select and measure the open and short circuit detection points of the PCBA, perform impedance calculation, communicate with the industrial computer (IPC) and the peripheral host computer, and provide power for the signal transfer module;

烧录模块，用于对PCBA进行程序烧录；The burning module is used to program the PCBA;

信号转接模块(16)，用于将PCBA上选定的检测点的检测结果信号引出；a signal transfer module (16), used to lead out the detection result signal of the selected detection point on the PCBA;

以及开关电源模块(17)，用于为整个装置提供直流电源。and a switching power supply module (17) for providing DC power for the entire device.

2.根据权利要求1所述的一种PCBA程序烧录与阻抗测试的装置，其特征在于：所述测量控制模块包括数字I/O设备(NI6501)、第一电控板(1)、第二电控板(2)和气动模块(3)，所述数字I/O设备(NI6501)将采集的信息上传给所述第一电控板(1)，所述第一电控板(1)分别与所述第二电控板(2)、所述气动模块(3)、所述烧录模块及所述信号转接模块电信号连接，所述第二电控板(2)分别与所述气动模块(3)、所述工控机(IPC)及所述信号转接模块通信连接。2. The device of a kind of PCBA program burning and impedance testing according to claim 1, it is characterized in that: described measurement control module comprises digital I/O equipment (NI6501), the first electric control board (1), the first Two electronic control boards (2) and a pneumatic module (3), the digital I/O device (NI6501) uploads the collected information to the first electronic control board (1), and the first electronic control board (1) ) are respectively connected with the electrical signal of the second electric control board (2), the pneumatic module (3), the programming module and the signal transfer module, and the second electric control board (2) is respectively connected with The pneumatic module (3), the industrial computer (IPC) and the signal transfer module are connected in communication.

3.根据权利要求2所述的一种PCBA程序烧录与阻抗测试的装置，其特征在于：所述第一电控板(1)包括I/O控制模块(4)和I/O供电模块(5)，所述数字I/O设备(NI6501)控制选择所述I/O控制模块(4)的I/O端口，通过I/O供电模块(5)对选定的I/O端口进行供电。3. the device of a kind of PCBA program burning and impedance test according to claim 2, is characterized in that: described first electric control board (1) comprises I/O control module (4) and I/O power supply module (5), the digital I/O device (NI6501) controls and selects the I/O port of the I/O control module (4), and performs the operation on the selected I/O port through the I/O power supply module (5). powered by.

4.根据权利要求3所述的一种PCBA程序烧录与阻抗测试的装置，其特征在于：所述第二电控板(2)包括第二MCU、第二供电模块(6)、I/O读写模块(7)、恒流模块(8)、继电器模块(9)、ADC模块(10)和UART通信模块(11)，所述第二供电模块(6)对所述第二电控板(2)的供电进行控制，所述I/O读写模块(7)与所述I/O控制模块(4)通信连接，所述恒流模块(8)为所述第二电控板(2)提供恒流源和恒压源，所述继电器模块(9)对PCBA开短路的检测点进行选择，所述ADC模块(10)对PCBA开短路的检测点的检测结果进行放大，所述UART通信模块(11)与所述工控机(IPC)及外围的上位机进行通信。4. the device of a kind of PCBA program burning and impedance testing according to claim 3, is characterized in that: described second electric control board (2) comprises second MCU, second power supply module (6), I/ O read-write module (7), constant current module (8), relay module (9), ADC module (10) and UART communication module (11), the second power supply module (6) controls the second electrical control The power supply of the board (2) is controlled, the I/O read-write module (7) is connected in communication with the I/O control module (4), and the constant current module (8) is the second electronic control board (2) a constant current source and a constant voltage source are provided, the relay module (9) selects the detection point of the open and short circuit of the PCBA, and the ADC module (10) amplifies the detection result of the detection point of the open and short circuit of the PCBA, so The UART communication module (11) communicates with the industrial personal computer (IPC) and a peripheral host computer.

5.根据权利要求2或3所述的一种PCBA程序烧录与阻抗测试的装置，其特征在于：所述气动模块(3)包括气动基板、电磁阀(12)、传感器(13)、计数器和紧急开关，所述电磁阀(12)、所述传感器(13)、所述计数器和所述紧急开关均与所述气动基板电信号连接。5. The device of a kind of PCBA program programming and impedance testing according to claim 2 or 3, characterized in that: the pneumatic module (3) comprises a pneumatic substrate, a solenoid valve (12), a sensor (13), a counter and an emergency switch, wherein the solenoid valve (12), the sensor (13), the counter and the emergency switch are all connected with the pneumatic substrate for electrical signals.

6.根据权利要求1所述的一种PCBA程序烧录与阻抗测试的装置，其特征在于：所述烧录模块包括烧录器(14)和HUB(15)。6. The device for programming a PCBA program and impedance testing according to claim 1, wherein the programming module comprises a programming device (14) and a HUB (15).

7.根据权利要求1所述的一种PCBA程序烧录与阻抗测试的装置，其特征在于：所述信号转接模块为双通道模块，所述信号转接模块通过探针与待测PCBA连接。7. the device of a kind of PCBA program burning and impedance test according to claim 1, is characterized in that: described signal transfer module is a dual-channel module, and described signal transfer module is connected with PCBA to be tested by probe .

8.根据权利要求1所述的一种PCBA程序烧录与阻抗测试的装置，其特征在于：所述开关电源模块提供两台12VDC-36A-432W的直流电源。8 . The device for programming a PCBA program and impedance testing according to claim 1 , wherein the switching power supply module provides two DC power supplies of 12VDC-36A-432W. 9 .

9.一种利用如权利要求4所述的PCBA程序烧录与阻抗测试的装置进行PCBA程序烧录和阻抗测试的方法，其特征在于，该方法包括以下步骤：9. a method utilizing the device of PCBA program burning and impedance testing as claimed in claim 4 to carry out PCBA program burning and impedance testing, is characterized in that, this method comprises the following steps:

a.所述第一电控板(1)为装置提供相应的电源和控制信号，将待测PCBA置入测试载具中并检测待测PCBA置入到位；a. The first electronic control board (1) provides corresponding power supply and control signal for the device, places the PCBA to be tested into the test carrier and detects that the PCBA to be tested is placed in place;

b.启动测试，所述第二MCU通过所述气动模块驱动测试载具进行测试；b. Start the test, the second MCU drives the test vehicle through the pneumatic module to test;

c.测试载具开始测试后，先进行开短路测试，当所有检测点都是满足条件的开路，则第二MCU控制第二供电模块为所述信号转接模块供电，测试继续进行并转入步骤e，否则，转入步骤d；c. After the test vehicle starts the test, the open and short circuit test is performed first. When all the detection points are open circuits that meet the conditions, the second MCU controls the second power supply module to supply power to the signal transfer module, and the test continues and transfers to Step e, otherwise, go to step d;

d.开短路测试失败，将失败结果上传到外围的上位机上并显示，第二MCU控制第二供电模块不给信号转接模块供电并对测试失败的检测点的阻抗进行检测，测出阻抗值，然后退出测试，测试载具恢复初始测试状态，待测PCBA退回检修；d. If the open-short circuit test fails, upload the failure result to the peripheral host computer and display it, the second MCU controls the second power supply module not to supply power to the signal transfer module, and detects the impedance of the detection point that fails the test, and measures the impedance value , and then exit the test, the test vehicle returns to the initial test state, and the PCBA to be tested is returned for maintenance;

e.开短路测试正常结束后，所述第二MCU控制第二供电模块为信号转接模块上电以供后续测试；e. After the open and short test is normally completed, the second MCU controls the second power supply module to power on the signal transfer module for subsequent testing;

f.通过烧录模块进行烧录操作，在正常烧录完成后，第二MCU进行烧录结果测试，当检测到烧录无误后，将烧录结果上传外围的上位机并显示，最后退出测试，回到测试初始状态，否则进行步骤g；f. Carry out the programming operation through the programming module. After the normal programming is completed, the second MCU will test the programming results. When it is detected that the programming is correct, upload the programming results to the peripheral host computer and display them, and finally exit the test. , return to the initial state of the test, otherwise go to step g;

g.当检测到烧录出错，判断为烧录失败，并将结果上传给外围的上位机，退出测试，回到测试初始状态，最后将烧录失败的PCBA返回检修。g. When a programming error is detected, it is judged that the programming has failed, and the results are uploaded to the peripheral host computer, exit the test, return to the initial state of the test, and finally return the failed PCBA for maintenance.

10.根据权利要求9所述的方法，其特征在于，所述步骤f中，第二MCU进行烧录结果测试的过程如下：外围的上位机控制所述数字I/O设备(NI6501)对PCBA进行开机操作，开机后发出音量增减指令，然后检测所述数字I/O设备(NI6501)的相应输入端口电平的变化，当电平变化与音量增减指令一致时，表示烧录完成；否则，表示烧录失败。10. method according to claim 9, is characterized in that, in described step f, the process that second MCU carries out burning result test is as follows: peripheral host computer controls described digital I/O equipment (NI6501) to PCBA Carry out the power-on operation, issue a volume increase or decrease command after booting, and then detect the change of the corresponding input port level of the digital I/O device (NI6501), when the level change is consistent with the volume increase or decrease command, it means that the programming is completed; Otherwise, it means that the programming failed.