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Enhanced universal functional test system (ef01 embedded fct)

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Enhanced universal functional test system (ef01 embedded fct)
Details

 

Enhanced Universal Functional Test System

(EF01 Embedded FCT)

 

1. Equipment pictures

Second, the function brief

 

The enhanced general function test system hardware (standard type) is centered on a main control board, which uses STM32 chip to store test files, read test files and test according to the test file process, peripheral IO control, voltage , resistance, current, frequency and other measurements, and can forward other board control commands. This board can be used in conjunction with other boards or alone. It can be used in connection with the host computer software, or it can be used without the host computer software.

 

Test mode: There are two test modes in this system. The first is to control the test process by the host computer software. That is, the upper computer software reads the test steps, and sends instructions to the main control board according to the test step process, and the main control board performs the test according to the instructions. Test results, and judge whether the test results are correct. After the test is over, the main control board can send the IO of sound and light alarm.

The second mode is that the host computer software uploads the created test file to the single-chip microcomputer of the main control board, and the host computer software sends offline test instructions, or clicks the test button on the main control board, and the single-chip microcomputer starts the test according to the created test process. , and upload the test results to the host computer software for display. After the test is over, the main control board can send the IO of sound and light alarm.

 

 

3. Equipment Features

 

1. The main control board and each functional board use the STM32F103RCT6 chip, which runs fast and has stable testing.

2. The size of the board is small (142*226), which can be directly placed inside the needle bed or tooling.

3. Using Pad as the display screen, the display screen is large and the operation is simple. Using the Windows system is more in line with the control habits of most people, and can realize all operations under Windows, with powerful functions. The upper computer software runs under the Windows system, and the modification and addition of functions are very convenient.

4. It can be used as embedded or wired, and can be used separately according to actual usage.

5. The embedded system can store five different test files, and the embedded boards can be used to correspond to different test fixtures.

6. External serial instrument equipment can be connected, and the serial port can be used to control other instruments for collaborative testing, which is convenient for system expansion.

7. Separation of programming and testing interfaces. The programming interface provides the creation of test files, and the test interface is responsible for testing. Prevent the test program from being arbitrarily changed, and make the data safe and reliable. After downloading to EPROM, the test data can only be read to the host computer to change, and the data is more secure.

8. The table format programming interface (similar to the inspection process file format used on the operation site) is used to facilitate the creation of test steps, and the order of test steps can be adjusted at will, and the test sequence and logical relationship can be combined arbitrarily.

9. Universal design. When designing software and hardware, full consideration is given to versatility. As long as it is within the functional indicators of the hardware configured in the tester, customers can easily replace different products to be tested. They only need to replace the corresponding test fixtures and configure different test files to test.

10. It has the ability of automatic full test and manual selection of single-step test, and single-step cycle test ability, which is convenient for customer engineers to debug the board under test.

11. When the specified defect of the circuit board under test (for example, power supply short circuit) occurs, the system will automatically stop the test in order to protect the board under test and the test system and prevent the failure from expanding.

12. When debugging, you can use the touch screen to operate the Pad, or you can connect the USB keyboard and mouse to operate the Pad through the USB HUB, which is convenient for debugging and data modification.

 

4. Technical indicators

1. Main control board technical indicators

1) Number of channels: 8 channels, any 2 channels can be switched, and the resistance and voltage measurement share the analog bus.

  2) DC characteristics:

  A. Input impedance: 10MΩ

   Input Protection: 600V.

  B. Voltage range:

     DC voltage: Standard: -200~+200V  

             -0.5~+0.5V accuracy 3%, -200~-0.5V 0.5~200V accuracy 1%

          Optional: -400~+400V  

             -0.5~+0.5V accuracy 3%, -400~-0.5V 0.5~400V accuracy 1%

     DC:

          1uA~ 30uA Accuracy 5%

          30uA~1mA Accuracy 3%

          1mA~30mA Accuracy 3%

          30mA~1A Accuracy 3%

3) AC Characteristics:

  A. Input impedance: 1MΩ

    Input Protection: 380V

  B. The effective value of AC voltage: 0-220V, frequency 5hz-1kHz, accuracy 3%

   RMS value of AC current:

              1uA~ 30uA Accuracy 5%

           30uA~1mA Accuracy 3%

           1mA~30mA Accuracy 3%

           30mA~1A Accuracy 3%

4) Frequency acquisition

  A. Frequency range:

        2Hz~10KHz voltage 0-220V, accuracy 1‰

        10k~4MHz voltage 0-30V, accuracy 1‰

5) Resistance acquisition (constant voltage measurement)

     1Ω~1MΩ Accuracy 3%

     1MΩ~10MΩ Accuracy 5%  

      Above 10MΩ Accuracy 10%     

2. Technical indicators of the channel switch board

1) Number of channels: 24 channels, which can be used as channel expansion of the main control board, or as a separate acquisition channel.

2) Voltage acquisition

  A. Voltage range:

       Standard: -200~+200V  

          -0.5~+0.5V accuracy 3%, -200~-0.5V 0.5~200V accuracy 1%

       Optional: -400~+400V  

           -0.5~+0.5V accuracy 3%, -400~-0.5V 0.5~400V accuracy 1%

3) Frequency acquisition

  A. Frequency range: 2HZ~1kHZ accuracy 1‰

3. Technical indicators of program-controlled power supply board

1) Number of channels: 2 channels can output constant current or constant voltage

2) Voltage range: 1.5-28V, step value 0.01V, accuracy 1%

     Standard configuration: internal power supply, when the internal power supply is powered, the maximum output voltage is the power supply voltage of the program-controlled power board minus 1V.

     Optional: external power supply, the output voltage is 1.5V~28V when the external power supply is powered.

3) Current range: constant current 100mA~1.5A, accuracy 1% + 1mA, current limit value can be set.

4. Technical indicators of positive and negative control input and output boards

1) Number of channels: 16 channels of output positive and negative terminal voltage (each 8 channels is a group)

     16-channel input digital signal (high level compatible with 1.8~30v voltage, low level below 0.5V).

2) Voltage and current: the maximum input current limit is 30V and the current limit is 10mA

       The maximum output current limit is 30V (determined by the power supply voltage) The current limit is 350mA

5. Technical indicators of switch output board

1) Number of Roads: 24 Roads

2) Rated current: 2A

3) Withstand voltage: 200V

 

Five, customer-oriented

1. It can be oriented to tooling and fixture manufacturers and processors. When tooling and fixture manufacturers receive orders, some customers have simple functional testing needs and can sell them boards.

2. Smaller and larger output circuit board manufacturers. Small circuit boards generally have relatively simple functions to be tested, and there are more functional test equipment required for larger output, and higher requirements for price. This type of customer can sell multiple devices at a low price.

3. High-voltage and high-power power supply is not required, and there is no other type of communication except serial communication. Test voltage, current, resistance, and frequency. Most boards of this type can be tested. If the communication test is required, the communication test can be extended.

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