TWI399550B - Testing system and method - Google Patents

Description

Test system and method

The present invention relates to a test system, and more particularly to a test system and method for testing an electronic product.

With the rapid development of electronic technology, the functions of electronic products are becoming more diversified, and the product assembly technology is becoming more and more refined. Correspondingly, product functional testing is also becoming more and more important. However, at present, the test of the product board requires a specially trained technician to test whether the board meets the corresponding technical specifications by using a test device such as a multimeter and an oscilloscope. In the process of testing, it is necessary to repeatedly move the electronic product according to the test project. Or testing the device, wasting human and material resources, and wasting a lot of time. In addition, technicians will inevitably make mistakes during the testing process, resulting in inaccurate test results.

In view of this, it is necessary to provide a test system that can automatically test electronic products.

In addition, it is necessary to provide a test method that can automatically test electronic products.

A test system including a test interface, a main controller, a signal generator, and a meter unit. The test interface includes a test point for connecting to the electronic product to be tested The plural test pins. The main controller is used to output control commands. The signal generator is configured to output a preset signal according to the control command, and the preset signal is input to the electronic product to be tested through the test interface. The meter unit includes a plurality of meters for reading test data from the corresponding test pins and outputting to the main controller; the main controller is further configured to determine whether the test data is within a normal range and record.

A testing method includes the following steps: generating a control command; outputting a preset signal to the electronic product to be tested according to the control command; reading the test data from the electronic product; determining whether the test data is within a normal range and recording.

The test interface of the test system is connected to all test points of the electronic product to be tested, and the control unit outputs different preset data to the electronic product, and the corresponding test data is read by the meter unit, and finally the test unit judges the test. Whether the data is normal or not, so as to judge whether the electronic product is qualified, the whole process does not need to move the electronic product, and can be automatically completed. The testing process of the test system and the test method is simple and easy to operate, and the worker can operate the test system independently without training. The test system can automatically complete all test projects without moving the electronic product to be tested, saving manpower and material resources. , reducing the cost of the entire test, improving the test efficiency of the product and the correct rate of test results.

10,50‧‧‧Test system

12‧‧‧Test interface

14‧‧‧ instrument unit

16‧‧‧Master Controller

18‧‧‧Signal Generator

20‧‧‧Switch unit

30‧‧‧Electronic products

70‧‧‧Two continuous circuit boards

100‧‧‧Test method

182‧‧‧Switching control circuit

184‧‧‧Power circuit

186‧‧‧Oscillation circuit

S101~S107‧‧‧ Test procedure

1 is a block diagram of a test system of a preferred embodiment.

2 is a block diagram showing the structure of a test system according to another preferred embodiment.

3 is a flow chart of a test method of a preferred embodiment.

As shown in FIG. 1, the test system 10 for testing the electronic product 30 includes a test interface 12, a meter unit 14, a main controller 16, a signal generator 18, and a switching unit 20.

The test interface 12 is an input/output (I/O) interface of the test system 10, which includes a plurality of test pins respectively connected to corresponding test points of the electronic product 30, for example, with a signal input port of the electronic product 30, The signal output port, the power port, and the port of the component to be tested in the circuit board of the electronic product 30 are connected. Correspondingly, the above plurality of test pins can be divided into an output test pin and an input test pin. The one end of the output test pin is connected to the signal input port or the power end of the electronic product 30, and the other end is connected to the signal generator 18 by the switching unit 20. One end of the input test pin is connected to the signal output end of the electronic product 30 or the port of the component to be tested, and the other end is connected to the meter unit 14 by the switching unit 20. In this embodiment, the test pin uses a double-ended needle.

The meter unit 14 includes a plurality of meters for respectively reading test data from the corresponding input test pins in a certain order or simultaneously under the control of the switching unit 20 and outputting them to the main controller 16. The above plurality of meters may include an ammeter for measuring current, a voltmeter for measuring voltage, and a frequency meter for measuring frequency.

In this embodiment, the main controller 16 is a computer with a test program installed to control the progress of the test, switch the test project, calculate and record the test results. In this embodiment, the main controller 16 is connected to the signal generator 18 and the meter unit 14, and sends a control command to the signal generator 18 according to the setting and receives the test data output by the meter unit 14, analyzes the test data, generates and records the test data. test result. The main controller 16 can also display the test result to the user in real time, and alarm or output a prompt signal when the corresponding test data is out of the normal range.

The signal generator 18 includes a programmable logic controller (PLC) and peripheral circuits for decoding the control command output by the main controller 16, generating a switching command to control the switching unit 20 to select a test project, and generating a preset. The signal is output to the electronic product 30 by the switching unit 20 and the corresponding output test pin. The preset signal may be a preset current, a preset voltage or a preset frequency. It is easy to understand that different electronic products 30 have different kinds of test projects, so an expansion unit is needed to expand the input/output interface of the above programmable controller in order to transmit complex test data. The expansion unit can be an expansion chip, such as an 8255 programmable parallel I/O expansion interface. When the number of projects to be tested is relatively small, the expansion unit 14 may not be used.

In this embodiment, the signal generator 18 includes a switching control circuit 182, a power supply circuit 184, and an oscillating circuit 186. The switching control circuit 182 is configured to decode the control command output by the main controller 16 and generate a switching command to control the operation of the switching unit 20.

The power circuit 184 is used to generate a preset voltage and current, and is mainly used for voltage and current testing of the electronic product 30. Many electronic products 30 have two power supply modes: an external power supply mode and a battery power supply mode, and some electronic products 30 also have a universal data bus interface power supply mode. When testing these electronic products 30, all voltage, current and frequency tests are required under different power supply modes. To this end, the power supply circuit 184 includes a plurality of power supply units that respectively output different pre-conditions. Set the voltage and current to be analogous to the different power supply methods.

The oscillating circuit 186 is operative to generate a preset frequency. When the electronic product 30 is an assembly circuit board including two or more circuit boards (ie, a circuit board interconnected in a board-to-board manner, such as a combo optical disc drive), the preset frequency can be used to verify the two or more collective circuit boards. the connection between. The specific test method is: the oscillating circuit 186 outputs a preset frequency, which is input from a signal input port of one of the integrated circuit boards of the electronic product 30 through a test interface, and the frequency meter in the meter unit 14 is connected to the switching unit 20 by the switching unit 20 On the corresponding signal output port of another collective circuit board, the main controller 16 receives the detected frequency signal from the frequency meter to determine whether the distortion and the degree of distortion, and then combines the conventional impedance test to determine the two sets of circuit boards. The connection is good. When the electronic product 30 is a wireless product, it can also detect whether the wireless communication quality is qualified. The oscillating circuit 186 can also include a plurality of oscillating circuit units for generating different preset frequencies, and the output of each oscillating circuit unit can be connected to the signal input port of the test electronic product 30 by a switch (belonging to the switching unit 20). . Thus, the electronic product 30 can be tested at different frequencies by switching the above switches.

The switching unit 20 includes a plurality of switches, which are partially connected between the plurality of meters of the meter unit 14 and the test interface 12 for switching the connection of the meter unit 14 to the test interface 12 according to the switching instruction output by the signal generator 18 to control the meter unit. The corresponding meter in 14 reads the test data from the corresponding input test pin of the test interface 12. The other part of the switch is connected between the signal generator 18 and the test interface 12 for switching the connection of the signal generator 18 to the test interface 12 according to the switching instruction output by the signal generator 18 to control the preset output by the signal generator 18. Capital The material is output to the electronic product 30 through the corresponding output test pin. It is easy to understand that when there are many meters in the meter unit 14, the input/output port of the main controller 16 may not be sufficient, and the switch needs to be connected between the main controller 16 and the meter unit 14. In the embodiment, the switch in the switching unit 20 uses a relay, and of course other types of electronic switches can also be used.

The specific working process of the test system 10 is: the main controller 16 issues a control command to the signal generator 18 according to the setting, and the switching control circuit 182 in the signal generator 18 generates a switching instruction according to the control command, and controls the switching unit 20 The corresponding switch in the power circuit 184 or the oscillating circuit 186 outputs the preset signal to the electronic product 30 through the corresponding output test pin, and also controls the switching unit 20 to connect the corresponding meter in the meter unit 14 to the test interface 12. Corresponding to the test pin, the output signal (ie, test data) of the electronic product 30 is read. The main controller 16 receives and stores the test data from the meter unit 14, and performs an analysis and judgment to generate a result. If the test result is within the normal range, the main controller 16 issues a control command for the next test project. If the test result is out of the normal range, the main controller 16 alarms or outputs a prompt message, and then releases the control command of the next test project. In this way, under the control of the main controller 16, the switching unit 20 continuously logs different preset data into the electronic product 30, and switches the corresponding meter to read the corresponding test data, and the overall cooperation automatically completes the testing process without moving the electronic device. Product 30.

In another preferred embodiment, the test system 50 includes a test interface 12, a plurality of meter units 14, a main controller 16, a signal generator 18, and a plurality of switching units 20 that can be used to test a multi-connected circuit board. Among them, the multi-connected circuit board is A complete circuit board includes a plurality of identical circuit regions, and finally the multi-connected circuit board is divided into a plurality of independent boards (electronics 30) by region. As shown in FIG. 2, in the present embodiment, the test system 50 includes two meter units 14 and two switching units 20 for testing the two-piece circuit board 70. When the test system 50 tests two electronic products 30 in the multi-piece circuit board 70 at the same time, the meter unit 14 and the switching unit 20 corresponding to the two electronic products 30 are independent of each other, and the signal generator 18 controls the two meter units 14 The corresponding meter in the test simultaneously tests the same project of the two electronic products 30, and the meter controls the test of the next project immediately after reading the test data.

As shown in FIG. 3, in a preferred embodiment, the test method 100 applied to the test system 10 includes the following steps:

In step S101, the main controller outputs a control command to the switching control circuit 182.

In step S102, the switching control circuit 182 outputs a switching instruction to the switching unit 20 in accordance with the control command.

In step S103, the switching unit 20 outputs a predetermined voltage, current or frequency signal output by the power circuit 184 or the oscillating circuit 186 to the electronic product 30 through the corresponding output test pin according to the switching instruction. The electronic product 30 can be an integrated circuit board.

In step S104, the switching unit 20 simultaneously connects the corresponding meter in the meter unit 14 to the corresponding test pin of the test interface 12 according to the switching instruction to read the test data from the electronic product 30. The test data may include voltage and current signals of the corresponding components, voltage, current or frequency signals of the signal output port.

In step S105, the main controller 16 receives and stores the test data from the meter unit 14, analyzes and judges the test data to generate test results, and stores them. The step of generating a test result may include the step of obtaining a test result data by calculating the plurality of test data.

In step S106, the main controller 16 determines whether the test data or the test result is within the normal range. If the test result is within the normal range, the next test is performed, and step S101 is performed. If the test data or the test result is out of the normal range, step S107 is performed.

In step S107, the main controller 16 alarms or outputs the prompt information according to the situation, and then performs the next test, and executes step S101. Of course, if the result of this test project is related to the eligibility of the electronic product 30, or may affect the progress of other test projects, the follow-up test project may be stopped after the detection of the test project beyond the normal range, thereby saving the process.

In summary, the invention has the advantages of simple test procedure, easy operation, automatic setting of the test project without moving the electronic product to be tested, saving manpower and material resources, reducing the cost required for the whole test, and improving the product. Test efficiency and the correct rate of test results.

10‧‧‧Test system

12‧‧‧Test interface

14‧‧‧ instrument unit

16‧‧‧Master Controller

18‧‧‧Signal Generator

20‧‧‧Switch unit

30‧‧‧Electronic products

182‧‧‧Switching control circuit

184‧‧‧Power circuit

186‧‧‧Oscillation circuit

Claims (14)

A test system, the improvement comprising: a test interface comprising a plurality of test pins for connecting to test points of an electronic product to be tested; a main controller for outputting control commands; and a signal generator for controlling according to the control The command outputs a preset signal; the preset signal is input to the electronic product to be tested through the test interface; the meter unit includes a plurality of instruments for reading test data from the corresponding test pin and outputting to the main controller; The controller is also used to determine whether the test data is within the normal range and recorded. The test system of claim 1, wherein the preset signal includes at least one of the following: a preset current, a preset voltage, and a preset frequency. The test system of claim 1, wherein the signal generator is further configured to output a switching instruction according to the control instruction. The test system of claim 3, wherein the test system further comprises a switching unit, configured to switch the connection between the meter unit and the test interface according to the switching instruction, to control the meter unit to read from the corresponding test pin. Take test data. The test system of claim 4, wherein the switching unit comprises a plurality of switches. The test system of claim 5, wherein the switch is controlled by a relay. The test system of claim 4, wherein the signal generator comprises: a switching control circuit for generating the switching instruction according to the control instruction; a power supply circuit for generating a preset voltage and current; and an oscillating circuit, Used to generate a preset frequency. The test system of claim 3, wherein the test system further includes a switching unit, configured to switch a connection between the signal generator and the test interface according to the switching instruction, to control the preset signal to pass the corresponding test. The pin is output to the electronic product to be tested. The test system of claim 8, wherein the switching unit comprises a plurality of switches. The test system of claim 9, wherein the switch is controlled by a relay. The test system of claim 8, wherein the signal generator comprises: a switching control circuit for generating the switching instruction according to the control instruction; a power supply circuit for generating a preset voltage and current; and an oscillating circuit, Used to generate a preset frequency. A test method includes the steps of: generating a control instruction; generating a switching instruction according to the control instruction; and connecting, according to the switching instruction, a corresponding meter for reading the test data to a corresponding port of the electronic product to be tested, to The test product is read by the electronic product to be tested; the test data is read from the electronic product; the test data is judged to be within the normal range and recorded. The test method of claim 12, wherein the preset signal comprises at least one of the following: a preset current, a preset voltage, and a preset frequency. The test method of claim 13, wherein the step of outputting the preset signal to the electronic product to be tested according to the control instruction comprises: generating a switching instruction according to the control instruction; switching according to the switching instruction for generating the preset The port of the module of the signal is connected to the electronic product to be tested to control the output of the corresponding preset signal to the corresponding port of the electronic product to be tested.