Test system for realizing ICT and FCT

Abstract

The utility model relates to a test system for realizing ICT and FCT, the test system is built based on an operating platform, the test system comprises a probe clamp, a functional circuit module, an ICT test circuit module and an FCT test circuit module, a tested controller product is arranged in the probe clamp, a board card power supply and a plurality of probe contacts are arranged in the probe clamp, and the probe contacts are connected with the functional circuit module and the ICT test circuit module. The test system establishes information communication connection with the tested controller product through the probe contact, and the board card power supply provides output power and is connected with the tested controller product through the probe contact; the ICT test circuit module comprises a signal detection circuit, a tool control panel, a display screen and a voltage detector; the FCT test circuit module comprises a BLDC motor and a DC power supply. The test system for realizing the ICT and the FCT is used for small-batch tests, and has the advantages of simple structure, low cost, short manufacturing period, reliability in use and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to electronic circuit test technical field especially is a kind of test system for realizing ICT and FCT. BACKGROUND

[0002] FCT test and ICT test belong to two test methods in PCBA function test, and have irreplaceable effect for the quality control of mass-produced PCBA, although both can test the problems in PCBA function, but its test principle and test project are different.

[0003] ICT test is mainly used to test whether the circuit function of electronic component on PCBA board exists abnormal condition, such as open circuit, short circuit, etc., and test point needs to be arranged on component in advance for ICT test, and the probe of tester must be accurately aligned with component test point during testing, ICT test is mainly static test, that is, test is carried out under no power-on condition, can quickly detect the reason of component circuit abnormality caused by such as poor welding or component misinstallation, and can give test abnormal result, to facilitate subsequent maintenance work;

[0004] FCT test is mainly used to test the functional aspects such as electronic and electrical functions of PCBA board, FCT test is dynamic test, that is, test is carried out under power-on condition, and its test principle is to simulate the real running state of PCBA board, input signal or power supply is input to test unit to test whether the data parameter of PCBA test unit is normal during operation, and test mainly includes voltage, current, power and other functional items;

[0005] And currently, ICT and FCT test are special independent test systems, some products exist trial production or small batch production in the early stage of development, and cost control is more sensitive, special ICT and FCT test system is made, and there is high cost and low use efficiency.If product needs to be reformed during trial production, it may affect the use of ICT or FCT, so as to cause the waste of test system and increase production cycle.

[0006] Therefore, a test system needs to be designed for small-batch trial-produced PCBA board and BLDC controller, which can also adapt to the change of flexibility requirement. CONTENT OF UTILITY MODEL

[0007] To solve the above technical problems, the utility model discloses a kind of test system of ICT and FCT, the test system is based on operating platform and is built, including probe fixture, functional circuit module, ICT test circuit module, FCT test circuit module, the probe fixture is equipped with the controller product to be measured, and probe fixture is equipped with board card power supply and several probe contacts, and test system is established information communication connection between probe contact and the controller product to be measured, wherein board card power supply provides output power and is connected with the controller product to be measured by probe contact;

[0008] The ICT test circuit module includes signal detection circuit, tool control panel, display screen, voltage detection, wherein signal detection circuit obtains several information of the controller product to be measured through probe contact, and the controller product to be measured, sends ICT detection information to tool control panel by UART communication, then test result is output and displayed on screen;

[0009] The FCT test circuit module includes BLDC motor, DC power supply, wherein the motor switch of BLDC motor is associated with control module in functional circuit module, when test 2 button set on operating platform is pressed, motor rotates normally, fan light is lit, speed is adjustable, and accurate, it is explained that FCT test passes through;Test 2 button is pressed again, and FCT test is finished.

[0010] In an embodiment of the utility model, the functional circuit module includes burning module, parameter setting module, control module, wherein burning module includes burning circuit, burner I, burner II, one end of the burning circuit is led out from one side of probe fixture, and the other end is connected with burner I and burner II respectively through the burning switch, wherein burner I is used for burning ICT test program writing, and burner II is used for mass production program writing;Parameter setting module includes parameter setting line, and the parameter setting line is arranged between probe fixture and upper computer, and is used for communication transmission between upper and probe fixture;Its control module includes potentiometer, starting switch, adapter, the potentiometer, starting switch and input end of adapter are connected, and the adapter is connected with measured controller through probe fixture.

[0011] In an embodiment of the utility model, the probe fixture is assembled and connected between board card fixing table and board card power supply, and probe contact is divided into power supply probe, phase line probe, voltage probe and signal probe according to function;

[0012] The power supply probe and the phase line probe are respectively used for connecting the power supply of the measured controller product and the motor phase line of the BLDC motor.

[0013] In one embodiment of the utility model, the burning circuit is contacted to the burning test point of the measured controller product through the burning probe in the probe clamp, and then the burning switch is connected to the burner I and the burner II.

[0014] In one embodiment of the utility model, one end of the parameter setting line is contacted to the parameter setting test point of the measured controller product through the parameter setting probe in the probe clamp, and then the route switch on the parameter setting line is connected to the USB to TTL serial port tool, and then the computer in the upper position is communicated, and the mass production parameter setting of the controller is realized through the computer.

[0015] In one embodiment of the utility model, the signal probe contacts the ctrl, digital and triger test points of the measured controller product, and the starting line is connected to the adapter board, the adapter board is connected to the control module, and the starting switch and the potentiometer are provided, and the starting switch or the potentiometer can be selected to start the controller work for different measured controller product parameters.

[0016] In one embodiment of the utility model, after the signal detection circuit is connected to the probe clamp, the fan probe, the digital probe, the LCD screen probe and the HALL probe collect the signals in the measured controller product, and the signal detection circuit is connected to the negative pole of the fan through the relay of the tool control board.

[0017] In one embodiment of the utility model, the voltage detection is collected through the voltage probe, and the 15V and 3.3V power supply outputs of the measured controller product are displayed on the display screen.

[0018] In one embodiment of the utility model, the input end of the BLDC motor and the direct current power supply in the FCT test circuit is connected to the probe clamp through the phase line probe and the power supply probe.

[0019] The above technical scheme of the utility model has the following advantages compared with prior art: the utility model discloses the test system for realizing ICT and FCT, is used for small batch testing, and has the advantages of simple structure, low cost, short manufacturing cycle, reliable use etc. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to make the content of the utility model more easily be clearly understood, the utility model is further detailed below according to the specific embodiment of the utility model and combining with the drawings.

[0021] Figure 1 It is the principle block diagram of the test system for realizing ICT and FCT of the utility model;

[0022] Figure 2 It is the test point schematic diagram of the controller product of the utility model;

[0023] Figure 3 It is the ICT test principle schematic block diagram in the utility model. DETAILED DESCRIPTION

[0024] The controller product of small batch production can be burned test program on a test equipment system, and the on-off detection of ICT is carried out to controller interface circuit and MOS tube, and the on-off of corresponding circuit or MOS tube can be displayed on the tool display screen.

[0025] As shown in Figure 1 The utility model discloses a kind of test systems for realizing ICT and FCT, and the test system is based on operation platform and is built, including probe fixture, functional circuit module, ICT test circuit module, FCT test circuit module, the probe fixture, controller is installed on fixture, fixture probe will be pressed tightly on the test point of controller PCBA board, so that the line to be measured of controller is connected with test system.

[0026] Functional circuit module includes 2 burners and burns test program and production program respectively, test program is used for ICT test, production program is used for FCT test;

[0027] Parameter line is connected with computer, and different product parameter setting can be carried out;

[0028] Control module provides two kinds of starting mode, i.e. starting switch starting and potentiometer starting.

[0029] The ICT test circuit is used to perform ICT circuit testing on the controller; the FCT test circuit is used to perform functional testing on the controller.

[0030] like Figure 2 The test points of the controller product under test are shown, and the names of each test point on the PCB board are labeled. The probes of the probe fixture will connect to the power supply, motor phase lines, 15V voltage, and all signal test points according to the test point distribution. The signal test points include trigger, UART communication, programming, fan, Ctrl, digital, LCD screen, HALL, and parameter setting, totaling 9 types.

[0031] The controller's digital, LCD screen, hall, and fan circuits can be tested using ICT (In-Circuit Test) to check the voltage changes at their test points, thus confirming the functionality of the corresponding circuits. The principle is as follows: Figure 3 The diagram shows the schematic of the ICT testing principle. The controller's digital, LCD screen, and HALL test points are accessed by probes into the testing system. After the controller is programmed with the test program, the test will be conducted in two steps:

[0032] The first step involves pressing the ICT test button, which powers on the controller. The relays in the test system then connect the circuits at these test points to the negative terminal FS-1 test point of the controller fan. In ICT test mode, the digital, LCD screen, and HALL circuits are pulled up by default, and the microcontroller detects these circuits. A high-level circuit detection indicates that the circuit from the microcontroller to the test point is normal; otherwise, the corresponding circuit is faulty.

[0033] The second step involves the microcontroller controlling FS-1 to conduct to GND 3 seconds after power-on. If the microcontroller detects a low level for the digital, LCD screen, and HALL circuits, it indicates that the corresponding circuits at the test points are normal. If some test points are high, it indicates that the corresponding circuits are abnormal. If all test points are high, it indicates that the circuit corresponding to FS-1 is abnormal.

[0034] All test results are detected by the controller MCU and sent to the test system via UART. The test system then displays the corresponding results on the console screen.

[0035] Specifically, the control panel includes seven buttons and a display screen. The seven buttons are: Backup (currently unused), Programming 1, Test 1, Programming 2, Parameter Setting, Test 2, and Discharge. All testing functions can be performed using these buttons. Except for the Discharge button, all buttons are self-locking and illuminated; pressing them closes the button and the indicator light illuminates to indicate that the device is in operation. Pressing them again turns off the light and unlocks the button.

[0036] Burn 1 is executed as controller burn ICT test program, test 1 is executed ICT test. Burn 2 is executed as controller burn production program, set parameter is executed production parameter setting, test 2 is executed FCT test, discharge key is pressed to discharge the controller which completes test 2 step, clear the controller charge, ensure safety.

[0037] The working principle of the test system for implementing ICT and FCT is as follows:

[0038] The complete test operation is divided into 5 steps, ICT program burn, ICT test, production program burn, production parameter setting, FCT test;

[0039] First, the measured controller product is installed on the probe fixture, the probe in the fixture will press the test points of the controller PCBA board, so that the measured circuit of the measured controller product is connected to the test system.

[0040] First step, ICT program burn. Burn probe contacts controller burn test point, from burn circuit through switch can connect burner I and burner II. Burner I can burn ICT test program, burner II can burn production program. Press burn 1 on the operation table, ICT test program is burned into the controller, after burn is completed, there will be a prompt sound. Press burn 1 again, burn is over;

[0041] Second step, ICT test. The digital, LCD screen, HALL test points of the controller are connected to the test system through the probe.

[0042] After pressing the test 1 button on the operation table, the controller is powered on, and the relays of the test system connect the lines of these test points with the negative FS-1 test point of the controller fan. In ICT test mode, the digital, LCD screen, HALL circuit is pulled up by default, and the single-chip microcomputer detects the digital, LCD screen, HALL circuit. If the circuit detection is high level, it means that the single-chip microcomputer to test point line is normal, otherwise the corresponding circuit is abnormal.

[0043] After the single-chip microcomputer of the controller is powered on for 3s, it controls FS-1 to be conductive with GND. If the single-chip microcomputer detects that the digital, LCD screen, HALL circuit is low level, it means that the line corresponding to the test point is normal. If some test points are high level, it means that the corresponding line is abnormal. If all test points are high level, it means that the FS-1 corresponding line is abnormal.

[0044] All test results are detected by the controller MCU, and the test results are sent to the test system through UART, and the corresponding results are displayed on the operation table display screen. After test is completed, press test 1 button, test is over;

[0045] Third, the mass production program is burned. Press the operation station to burn 2, the mass production program is burned into the controller, and after the burning is completed, a prompt sound will be heard.

[0046] Press the burning 2 again, and the burning is completed.

[0047] Fourth, the mass production parameter is set. Press the operation station to set the parameter, and the computer upper machine is used to set the mass production parameter of the controller. Press the parameter setting key again, and the parameter setting is completed.

[0048] Fifth, FCT test. Press the operation station test 2, and the controller is connected with the power supply and the motor. There are start switches and potentiometers on the board, which correspond to two starting modes respectively.

[0049] The first one is the switch starting mode. First, press the power-on button, the controller is powered on, and the power supply indicator light and the three gear indicator light are lit. Then press the start button, the motor rotates, press the gear button, the gear indicator light switches between 1, 2 and 3 gears in turn, and the rotating speed changes accordingly. The rotating speed is the slowest at 1 gear and the fastest at 3 gear. If there is no action for more than 1 minute, the power will be automatically turned off. The time can be configured by parameter setting.

[0050] The second one is the potentiometer starting mode. First, press the potentiometer, and the motor can rotate. The depth of pressing the potentiometer is proportional to the rotating speed of the motor.

[0051] According to the selection of the mass production product, the corresponding starting mode is selected, the motor rotates normally, the fan light is lit, the rotating speed is adjustable, the shutdown is accurate, and the FCT test is passed. Press the test 2 key again, and the FCT test is completed.

[0052] Press the discharge button to discharge the capacitor of the controller, and then take down the controller.

[0053] The utility model discloses a test system of ICT and FCT, which is used for small batch testing and has the advantages of simple structure, low cost, short manufacturing period, reliable use and the like. The main interface circuit, MOS tube and power supply of the controller can be short-circuited and checked. The FCT test can detect the functions of driving the motor, different switch modes, gear switching and rotating speed change of the controller.

[0054] Meanwhile, the test system has the advantages of simple structure, easy operation, low manufacturing cost, stable and reliable test, flexible adjustment and wide application in controller trial production or small batch production scenes.

[0055] Obviously, the above embodiments are only examples for clearly illustrating, and are not limited to the embodiments. Other different forms of changes or variations can be made by those skilled in the art on the basis of the above description. It is not necessary or impossible to enumerate all the embodiments. The obvious changes or variations derived therefrom are still within the protection scope of the utility model.

Claims

1. A test system implementing ICT and FCT, the test system being built based on an operation platform, characterized in that, The probe clamp, the function circuit module, the ICT test circuit module and the FCT test circuit module are provided with the measured controller product, and the probe clamp is provided with the board power supply and a plurality of probe contacts, and the test system is connected with the measured controller product through the probe contacts to establish information communication connection, wherein the board power supply provides output power connected with the measured controller product through the probe contacts; The ICT test circuit module comprises a signal detection circuit, a tool control panel, a display screen and a voltage detection circuit, wherein the signal detection circuit obtains a plurality of information of the measured controller product through the probe contacts, and the measured controller product sends the ICT detection information to the tool control panel through UART communication, and then the test result is output and displayed on the screen. The FCT test circuit module comprises a BLDC motor and a direct current power supply, wherein the motor switch of the BLDC motor is associated with the control module of the function circuit module.

2. The test system for implementing ICT and FCT of claim 1, wherein: The function circuit module comprises a burning module, a parameter setting module and a control module, wherein the burning module comprises a burning circuit, a burner I and a burner II, one end of the burning circuit is led out from one side of the probe clamp, and the other end is connected with the burner I and the burner II through the burning switch, wherein the burner I is used for burning the ICT test program, and the burner II is used for writing the mass production program; the parameter setting module comprises a parameter setting line, and the parameter setting line is arranged between the probe clamp and the upper computer and is used for communication transmission between the upper computer and the probe clamp; The control module comprises a potentiometer, a starting switch and an adapter, the potentiometer and the starting switch are connected with the input end of the adapter, and the adapter is connected with the measured controller through the probe clamp.

3. The test system for implementing ICT and FCT of claim 1, wherein: The probe clamp is assembled and connected between the board fixing table and the board power supply through the board fixing table, and the probe contacts are divided into power supply probes, phase line probes, voltage probes and signal probes according to functions. The power supply probes and the phase line probes are respectively used for connecting the board power supply and the motor phase line of the BLDC motor of the measured controller product, and the signal probes comprise a triger trigger probe, a UART communication probe, a burning probe, a fan probe, a ctrl probe, a digital probe, an LCD screen probe, a HALL probe and a parameter setting probe, and there are 9 kinds of probes.

4. The test system for implementing ICT and FCT of claim 2, wherein: The burning circuit contacts the burning test point of the measured controller product through the burning probe in the probe clamp, and then connects the burner I and the burner II through the burning switch.

5. The test system for implementing ICT and FCT of claim 2, wherein: One end of the parameter setting line contacts the parameter setting test point of the measured controller product through the parameter setting probe in the probe clamp, and then connects the USB to TTL serial port tool through the switch on the parameter setting line, and then communicates with the upper computer.

6. The test system for implementing ICT and FCT of claim 3, wherein: The signal probes contact the ctrl, digital and triger test points of the measured controller product, and then connect the control module through the starting line and the adapter.

7. The test system for implementing ICT and FCT of claim 1, wherein: After the signal detection circuit is connected with the probe clamp, the fan probe, the digital probe, the LCD screen probe and the HALL probe collect the signals in the measured controller product; and the signal detection circuit is connected with the negative electrode of the fan through the relay of the tool control panel.

8. The test system for implementing ICT and FCT of claim 1, wherein: The voltage detection collects the 15V and 3.3V power supply outputs of the measured controller product through the voltage probe, and displays the voltage measurement results on the display screen.

9. The test system for implementing ICT and FCT of claim 1, wherein: The input ends of the BLDC motor and the DC power supply in the FCT test circuit are connected with the probe clamp through the phase line probe and the power supply probe.

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