CN212207571U - PCBA program burning and impedance testing device - Google Patents

Abstract

The utility model provides a simple structure, function complete, with low costs and PCBA procedure burning record and impedance test's that operating efficiency is high device. The device comprises an Industrial Personal Computer (IPC) for detecting and controlling the program burning process of the PCBA and the testing process of the 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 (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; the signal switching module (16) is used for leading out a detection result signal of a selected detection point on the PCBA; and a switching power supply module (17) for providing a direct current power supply for the entire apparatus. The utility model is used for PCBA test field.

Description

PCBA program burning and impedance testing device

Technical Field

The utility model relates to a PCBA test field especially relates to a PCBA program burns record and impedance test's device.

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.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that overcome prior art not enough, provide a simple structure, function complete, with low costs and the high device of PCBA program burning record and impedance test of operating efficiency.

The technical scheme adopted by the utility model is as follows: the utility model comprises an industrial personal computer, which is used for detecting and controlling the program burning process of the PCBA and the testing process of the 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; furthermore, the device of the utility model is simple in structure, realized PCBA's FCT and ICT combination of testing simultaneously, promoted efficiency of software testing greatly, integrated FCT and ICT test and other test function on a device, and through the cooperation of industrial computer and measurement control module, guaranteed going on smoothly of testing process, this cost is reduced relatively.

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.

The scheme shows that the measurement control module is composed of a digital I/O device, a first electric control board, a second electric control board and a pneumatic module, wherein the digital I/O device is responsible for providing and configuring an I/O port, the first electric control board is used for being connected with the pneumatic module, other action components and signal acquisition components arranged in the device and controlling the actions of the components to upload corresponding information to the second electric control board, the second electric control board is responsible for processing the information acquired by the first electric control board and providing power supply control, the selection and measurement of an open-short circuit detection point of the PCBA are carried out, impedance calculation is carried out, the PCBA is communicated with an industrial personal computer and a peripheral upper computer, and power is provided for the signal switching module, so that the first electric control board and the second electric control board respectively carry out different operations, and the work division control mode ensures the smoothness and the control precision of the system, and a modular design is formed, an efficient solution is provided for subsequent maintenance, and the maintenance efficiency is greatly improved.

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. It is thus clear that, through the cooperation setting of each module, can realize opening the short circuit to PCBA and detect, realized again to PCBA's burning record and the self-checking after the burning record, realize combining PCBA's FCT and ICT test as an organic whole, reduced the cost of whole device relatively, also promoted PCBA's test speed the utility model discloses can one step realize multi-functional test and burn record operation on the device.

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.

Drawings

FIG. 1 is a block diagram of the principle structure 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 of the utility model comprises an industrial personal computer IPC, which is used for detecting and controlling the program burning process of the PCBA and the testing process of impedance, 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; the signal switching module 16 is used for leading out a detection result signal of a selected detection point on the PCBA; and a switching power supply module 17 for supplying a direct current power supply to the entire apparatus.

The measurement control module comprises a digital I/O device NI6501, a first electric control board 1, a second electric control board 2 and a pneumatic module 3, the digital I/O device NI6501 uploads collected information to the first electric control board 1, the first electric control board 1 is in electric signal connection with the second electric control board 2, the pneumatic module 3, the burning module and the signal switching module respectively, and the second electric control board 2 is in communication connection with the pneumatic module 3, the industrial personal computer IPC and the signal switching module respectively. The first electronic control board 1 comprises an I/O control module 4 and an I/O power supply module 5, and the digital I/O device NI6501 controls and selects an I/O port of the I/O control module 4, and supplies power to the selected I/O port through the I/O power supply module 5. The second electric control board 2 comprises a second MCU, a second power supply module 6, an I/O read-write module 7, a constant current module 8, a relay module 9, an ADC module 10 and a UART communication module 11, the second power supply module 6 controls power supply of the second electric control board 2, the I/O read-write module 7 is in communication connection with the I/O control module 4, the constant current module 8 provides a constant current source and a constant voltage source for the second electric control board 2, the relay module 9 selects detection points of PCBA open short circuit, the ADC module 10 amplifies detection results of the detection points of PCBA open short circuit, and the UART communication module 11 is communicated with the IPC and a peripheral upper computer. The pneumatic module 3 comprises a pneumatic substrate, an electromagnetic valve 12, a sensor 13, a counter and an emergency switch, wherein the electromagnetic valve 12, the sensor 13, the counter and the emergency switch are all in electric signal connection with the pneumatic substrate. The burning module comprises a burner 14 and a HUB 15. The signal switching module is a dual-channel module, and is connected with the PCBA to be tested through the probe. The switching power supply module provides two 12VDC-36A-432W direct current power supplies.

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 first electric 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;

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.

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 utility model discloses with ICT's partial function and FCT's combination, can accomplish the quick automatic test to specific function or special needs. This ensures that the product under test is not burned out when it is subjected to the FCT test directly.

The utility model discloses an automatic test technique is got rid of most human factors outside, and the data that obtain are comparatively accurate to can fix a position the short circuit between which points fast according to the detection point position. 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 utility model has the advantages as follows:

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 (8)

1. A PCBA program burning and impedance testing device is characterized in that: the device comprises

The Industrial Personal Computer (IPC) is used for detecting and controlling the program burning process of the PCBA and the testing process of the 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 (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;

the signal switching module (16) is used for leading out a detection result signal of a selected detection point on the PCBA;

and a switching power supply module (17) for providing a direct current power supply for the entire apparatus.

2. The apparatus of claim 1, wherein the PCBA programming and impedance testing apparatus comprises: the measurement control module comprises a digital I/O device (NI6501), a first electric control board (1), a second electric control board (2) and a pneumatic module (3), the digital I/O device (NI6501) uploads collected information to the first electric control board (1), the first electric control board (1) is respectively connected with the second electric control board (2), the pneumatic module (3), the burning module and the signal transfer module through electric signals, and the second electric control board (2) is respectively connected with the pneumatic module (3), the Industrial Personal Computer (IPC) and the signal transfer module through communication.

3. The apparatus of claim 2, wherein the PCBA programming and impedance testing apparatus comprises: the first electric control board (1) comprises an I/O control module (4) and an I/O power supply module (5), the digital I/O device (NI6501) controls and selects an I/O port of the I/O control module (4), and the selected I/O port is powered through the I/O power supply module (5).

4. The apparatus of claim 3, wherein the PCBA programming and impedance testing apparatus comprises: the second electric control board (2) comprises a second MCU, a second power supply module (6), an I/O read-write module (7), a constant current module (8), a relay module (9), an ADC module (10) and a UART communication module (11), the second power supply module (6) controls the power supply of the second electric control board (2), the I/O read-write module (7) is in communication connection with the I/O control module (4), the constant current module (8) provides a constant current source and a constant voltage source for the second electric control board (2), the relay module (9) selects detection points of the PCBA open short circuit, the ADC module (10) amplifies the detection result of the UART of the PCBA open short circuit, and the PCBA communication module (11) communicates with the Industrial Personal Computer (IPC) and a peripheral upper computer.

5. The apparatus of claim 2 or 3, wherein the PCBA program burning and impedance testing apparatus comprises: the pneumatic module (3) comprises a pneumatic substrate, an electromagnetic valve (12), a sensor (13), a counter and an emergency switch, wherein the electromagnetic valve (12), the sensor (13), the counter and the emergency switch are all in electric signal connection with the pneumatic substrate.

6. The apparatus of claim 1, wherein the PCBA programming and impedance testing apparatus comprises: the burning module comprises a burner (14) and a HUB (15).

7. The apparatus of claim 1, wherein the PCBA programming and impedance testing apparatus comprises: the signal switching module is a dual-channel module, and is connected with the PCBA to be tested through the probe.

8. The apparatus of claim 1, wherein the PCBA programming and impedance testing apparatus comprises: the switching power supply module provides two 12VDC-36A-432W direct current power supplies.

Images