TWI837998B - Signal switching and verification device and signal verification system - Google Patents

Abstract

The signal switching and verification device of the present invention is provided for connection between a workstation, an automatic test equipment and a signal measuring device, wherein the automatic test equipment includes a plurality of test modules; the signal switching and verification device includes a voltage regulator element for generating a verification voltage, a verification relay electrically connected between the voltage regulator element and the signal measuring device, and a plurality of test relays electrically connected between the test modules and the signal measuring device; wherein the driving ends of the verification relay and the test relays are respectively electrically connected to the workstation to receive a switching signal; by receiving the switching signal, the present invention can quickly switch the conduction state of the verification relay and the test relays, so as to assist in calibrating the signal measuring device and the automatic test equipment.

Description

Signal switching and verification device and signal verification system

A signal switching and verification device and a signal verification system can assist in calibrating the measurement of a signal measuring device and the accuracy of a test signal output by an automatic test equipment.

In the packaging test process before an electronic component is shipped out of the factory, an electronic component needs to be tested by an automatic test device. This automatic test device has a plurality of test modules for electrically connecting the pins of the electronic component, and each of these test modules can be set to perform electrical tests of different properties on the electronic component to facilitate the detection of whether the electronic component has defects, whether it is qualified, and whether it can be shipped out of the factory.

However, as the automatic test equipment is used for a long time, the test signals provided by the test modules may have errors. In order to ensure that the test modules can maintain the electrical test standards, a signal measuring device (such as a digital multimeter) can be connected to the automatic test equipment to facilitate the signal measuring device to measure the output of the test modules in the automatic test equipment, so as to formulate a policy of regularly calibrating the test modules based on the output of the test modules.

The problem is that, as the signal measuring device is used for a long time, the signal measuring device itself may also have measurement errors, causing the signal measuring device to measure incorrectly. When the signal measuring device measures incorrectly, the test modules in the automatic test equipment cannot be correctly measured and calibrated.

In view of the problems described in the prior art, the present invention provides a signal switching and verification device, which is connected between a workstation, an automatic test equipment and a signal measurement device, wherein the automatic test equipment includes a plurality of test modules. The signal switching and verification device cooperates with the workstation, the automatic test equipment and the signal measurement device to help quickly detect whether the signal measurement device has measurement errors, and further help detect whether each test module in the automatic test equipment needs to be calibrated.

The signal switching and verification device of the present invention includes a voltage regulator, a verification relay and a plurality of test relays. The voltage regulator generates a verification voltage. The verification relay is electrically connected between the voltage regulator and the signal measuring device, and the driving end of the verification relay is electrically connected to the workstation to receive the switching signal. The test relays are electrically connected between the test modules and the signal measuring device, respectively, and the driving end of each test relay is electrically connected to the workstation to receive the switching signal.

The present invention also provides a signal verification system, which is used to verify multiple test modules of an automatic test equipment, and the signal verification system includes a workstation, a signal measurement device and a signal switching and verification device. The signal switching and verification device is electrically connected to the workstation, the signal measurement device and each of the test modules of the automatic test equipment respectively. Among them, the signal switching and verification device includes a voltage regulator, a verification relay and multiple test relays. The voltage regulator generates a verification voltage. The verification relay is electrically connected between the voltage regulator and the signal measurement device, and the driving end of the verification relay is electrically connected to the workstation to receive the switching signal. The test relays are electrically connected between the test modules and the signal measuring device, respectively, and the driving end of each test relay is electrically connected to the workstation to receive a switching signal. When the verification relay is switched on, the voltage stabilizing element outputs the verification voltage to the signal measuring device through the conducting verification relay. When each test relay is switched on, each test module outputs a test signal to the signal measuring device through each conducting test relay. When the verification relay is switched on, the test relays are switched off, and when at least one of the test relays is switched on, the verification relay is switched off.

The signal switching and verification device of the present invention can receive the switching signal sent by the workstation to switch the conduction state of the verification relay and the test relays. In detail, when the verification relay is turned on, the verification voltage output to the signal measuring device can assist in the calibration of the signal measuring device. In other words, the voltage value measured by the signal measuring device should be the voltage value of the verification voltage, and if the voltage value measured by the signal measuring device deviates, the signal measuring device can be calibrated to correctly present the measured voltage value.

When each of the test relays is turned on, the signal switching and verification device of the present invention assists the calibrated signal measuring device to receive the test signal output by each of the test relays, so that the calibrated signal measuring device assists in measuring the test signal of the automatic test equipment, so as to further calibrate the accuracy of the test signal output by each of the test relays according to the measurement of the calibrated signal measuring device. In this way, the signal switching and verification device of the present invention can quickly and sequentially assist in calibrating the measurement of the signal measuring device and assist in calibrating the accuracy of the test signal output by the automatic test equipment, ensuring that the measurement and calibration of the automatic test equipment is performed under the premise that the signal measuring device functions normally.

1A , the present invention provides a signal switching and verification device 10. The signal switching and verification device 10 is connected between a workstation 20, an automatic test equipment 30 and a signal measurement device 40. The automatic test equipment 30 includes a plurality of test modules 31.

Please refer to FIG. 1B , the present invention further provides a signal verification system 100. The signal verification system 100 is used to verify the test modules 31 of the automatic test equipment 30, and the signal verification system 100 includes the aforementioned signal switching and verification device 10, the workstation 20, and the signal measurement device 40. The signal switching and verification device 10 is electrically connected to the workstation 20, each of the test modules 31 of the automatic test equipment 30, and the signal measurement device 40.

The signal switching and verification device 10 includes a voltage regulator 11, a verification relay 12 and a plurality of test relays 13. The voltage regulator 11 generates a verification voltage. The verification relay 12 is electrically connected between the voltage regulator 11 and the signal measuring device 40, and the driving end of the verification relay 12 is electrically connected to the workstation 20 to receive the switching signal. The test relays 13 are electrically connected between the test modules 31 and the signal measuring device 40, and the driving end of each test relay 13 is electrically connected to the workstation 20 to receive the switching signal.

Specifically, the automatic test equipment 30 used in conjunction with the signal switching and verification device 10 of the present invention is a packaging and testing machine of an electronic component packaging and testing factory, and the signal measuring device 40 is a third-party testing device used when the automatic test equipment 30 needs to be calibrated. The purpose of the present invention is to effectively assist in calibrating the accuracy of the voltage measured by the signal measuring device 40, and further assist in calibrating the accuracy of the multiple test signals generated by the test modules 31 of the automatic test equipment 30. The following will be described in detail in conjunction with an embodiment of the present invention.

Please refer to FIG. 2 . In this embodiment, the automatic test equipment 30 has a power module 32, and the test modules 31 of the automatic test equipment 30 include a first test module 31A and a second test module 31B. The automatic test equipment 30 is a test machine of model J750. The power module 32 can generate and output 5 volts (Volt; V). The first test module 31A and the second test module 31B can respectively plan different electrical test items for the electronic components to be tested, so as to detect whether the electronic components to be tested have defects.

In this embodiment, the voltage regulator element 11, the verification relay 12 and the test relays 13 of the signal switching and verification device 10 are arranged on a multi-layer circuit substrate. The signal switching and verification device 10 of the present invention further includes a power port 14, and the test relays 13 of the signal switching and verification device 10 include a first test relay 13A and a second test relay 13B. The first test relay 13A, the second test relay 13B and the verification relay 12 are each a relay of model KEM UA2. The verification relay 12, the first test relay 13A and the second test relay 13B each have a relay coil (not shown), that is, each KEM UA2 relay has a coil between the 8th pin and the 1st pin. Each relay coil has two opposite ends, a first end connected to the power port 14, and a second end connected to the workstation 20. In addition, the first test relay 13A is electrically connected between the first test module 31A and the signal measurement device 40, and the second test relay 13B is electrically connected between the second test module 31B and the signal measurement device 40.

The power port 14 is electrically connected to the power module 32 of the automatic test device 30, and the power port 14 receives a 5V power supply from the power module 32. In other words, the power port 14 is electrically connected to the first end of the coil of the first test relay 13A, the first end of the coil of the second test relay 13B, and the first end of the coil of the verification relay 12, so that the first test relay 13A, the second test relay 13B, and the verification relay 12 can each receive a 5V power supply through the power port 14. The second end of the coil of the verification relay 12 is the driving end of the verification relay 12, the second end of the coil of the first test relay 13A is the driving end of the first test relay 13A, and the second end of the coil of the second test relay 13B is the driving end of the second test relay 13B. The voltage regulator 12 receives the 5V power supply to generate and output the verification voltage. In this embodiment, the voltage regulator 12 is a chip of model MAX6126, and the verification voltage is an output voltage of 3V of the chip. The voltage regulator 12 has a power input terminal and a power output terminal. The power port 14 is electrically connected to the power input terminal of the voltage regulator 12 to facilitate transmitting the 5V power to the voltage regulator 12. The voltage regulator 12 receives the power to generate the verification voltage, and outputs the verification voltage through the power output terminal of the voltage regulator 12.

The voltage regulator element 12 can be electrically connected to the position of the fifth pin of the KEM UA2 relay of the verification relay 12, and the signal measuring device 40 can be electrically connected to the position of the sixth pin. The driving end of the verification relay 12 can control whether the fifth pin and the sixth pin of the KEM UA2 relay are conductive, that is, whether the fifth pin is electrically connected to the sixth pin or the seventh pin is left unconnected.

The first test module 31A can be electrically connected to the position of the third pin of the KEM UA2 relay of the first test relay 13A, and the signal measurement device 40 can be electrically connected to the position of the fourth pin. The second test module 31B can be electrically connected to the position of the third pin of the KEM UA2 relay of the second test relay 13B, and the signal measurement device 40 can be electrically connected to the position of the fourth pin. The driving end of the first test relay 13A and the driving end of the second test relay 13B can each control whether the third pin and the fourth pin of the KEM UA2 relay are conductive, that is, whether the third pin is electrically connected to the fourth pin or the second pin is unconnected.

The workstation 20 has a processing module 21, a memory module 22 and a human-machine interaction module 23. The processing module 21 is electrically connected to the memory module 22 and the human-machine interaction module 23, and the processing module 21 is also electrically connected to the driving end of the verification relay 12, the driving end of the first test relay 13A and the driving end of the second test relay 13B. The processing module 21 controls the switching of the conduction state of the verification relay 12, the conduction state of the first test relay 13A and the conduction state of the second test relay 13B respectively by generating a calibration standard switching signal, a first switching signal and a second switching signal. In this embodiment, the processing module 21 can be a microcontroller or a microprocessor, and the memory module 22 is a memory.

Specifically, when the processing module 21 stops conducting the driving end of the verification relay 12 by generating the calibration standard switching signal, the relay coil at the driving end of the verification relay 12 will form an open circuit and stop conducting the 5V power supply from the power port 14. In this way, the relay coil of the verification relay 12 will drive the verification relay 12 to change the electrical connection state between the voltage regulator element 11 and the signal measurement device 40.

Similarly, when the processing module 21 stops conducting the driving end of the first test relay 13A by generating the first switching signal, the relay coil at the driving end of the first test relay 13A will form an open circuit and stop conducting the 5V power from the power port 14. In this way, the relay coil of the first test relay 13A will drive the first test relay 13A to change the electrical connection state between the first test module 31A and the signal measurement device 40. When the processing module 21 stops conducting the driving end of the second test relay 13B by generating the second switching signal, the relay coil at the driving end of the second test relay 13B will form an open circuit and stop conducting the 5V power from the power port 14. In this way, the relay coil of the second test relay 13B will drive the second test relay 13B to change the electrical connection state between the second test module 31B and the signal measurement device 40.

Furthermore, the memory module 22 stores a verification measurement mode data and a verification accuracy mode data. The human-computer interaction module 23 includes a screen unit and an input unit. In the present embodiment, the screen unit and the input unit of the human-computer interaction module 23 are both a touch screen. In another embodiment, the screen unit of the human-computer interaction module 23 is a computer screen, and the input unit of the human-computer interaction module 23 is a keyboard and a mouse. The human-computer interaction module 23 can be used as a device for interacting with a user. When the human-computer interaction module 23 generates a switching mode signal, the processing module 21 executes a verification measurement mode or a verification accuracy mode according to the switching mode signal received from the human-computer interaction module 23.

Please refer to FIG. 2 , in the verification measurement mode, the processing module 21 generates a switching signal according to the verification measurement mode data to switch the verification relay 12 on and the test relays off. In detail, under the verification measurement mode, the processing module 21 generates the calibration standard switching signal, the first switching signal and the second switching signal according to the verification measurement mode data, so as to correspondingly control the verification relay 12 to conduct the electrical connection state between the voltage regulator element 11 and the signal measurement device 40, control the first test relay 13A to not conduct the electrical connection state between the first test module 31A and the signal measurement device 40, and control the second test relay 13B to not conduct the electrical connection state between the second test module 31B and the signal measurement device 40. In this case, the verification voltage generated by the voltage regulator element 11 can be conducted to be received by the signal measuring device 40, and the signal measuring device 40 cannot receive signals from the first test module 31A and the second test module 31B. In this embodiment, the signal measuring device 40 is a digital multimeter of model HP3458A, and the signal measuring device 40 is electrically connected to the automatic test equipment 30, so that the voltage value measured by the signal measuring device 40 is presented through the automatic test equipment 30. In this embodiment, the automatic test equipment 30 is further connected to the human-machine interaction module 23 of the workstation 20 , so that the screen unit of the human-machine interaction module 23 of the workstation 20 can also conveniently and synchronously display the voltage value measured by the signal measuring device 40 .

The user can understand whether the signal measuring device 40 needs to be calibrated by observing the voltage value measured by the signal measuring device 40. In other words, the verification voltage generated by the voltage regulator 11 is an absolutely correct reference voltage. When the voltage value measured by the signal measuring device 40 is the same as the verification voltage, the user can know that the signal measuring device 40 has been measured correctly and does not need to be calibrated. When the voltage value measured by the signal measuring device 40 is different from the verification voltage, the user can calibrate the signal measuring device 40 until the signal measuring device 40 measures correctly. The calibrated signal measuring device 40 can measure the voltage value correctly.

Please refer to FIG. 3 , after calibrating the signal measuring device 40, the user can change the operation mode of the workstation 20 by operating the input unit of the human-machine interaction module 23. Under the verification accuracy mode, the processing module 21 generates a switching signal based on the verification accuracy mode data to switch at least one of the test relays to conduction and the verification relay 12 to non-conduction. In detail, under the verification accuracy mode, the processing module 21 generates the calibration standard switching signal, the first switching signal and the second switching signal according to the verification accuracy mode data, so as to correspondingly control the verification relay 12 to not conduct the electrical connection state between the voltage regulator element 11 and the signal measurement device 40, and control the first test relay 13A to conduct the electrical connection state between the first test module 31A and the signal measurement device 40, or control the second test relay 13B to conduct the electrical connection state between the second test module 31B and the signal measurement device 40. In the example of FIG. 3 , the first test relay 13A and the second test relay 13B are both turned on. In this case, the signal measuring device 40 cannot receive the standard signal generated by the voltage regulator element 11, while the signal measuring device 40 can receive signals from the first test module 31A and the second test module 31B.

A first test signal generated by the first test module 31A and a second test signal generated by the second test module 31B can be output to the signal measuring device 40 after being calibrated by the user through the first test relay 13A and the second test module 31B respectively. The calibrated signal measuring device 40 can correctly measure the first test signal and the second test signal to generate a first test result and a second test result correspondingly, and output the first test result and the second test result to the automatic test equipment 30 for presentation. Similarly, the automatic test equipment 30 can also output the first test result and the second test result to the screen unit of the human-machine interaction module 23 of the workstation 20 for synchronous presentation of the results.

According to the measurement results of the first test signal and the second test signal, the user can decide whether the automatic test equipment 30 needs to be calibrated according to the first test result and the second test result.

Furthermore, the memory module 22 stores a test threshold range, an operation data, and a maintenance record data. When the processing module 21 receives the first test result and the second test result corresponding to the first test module 31A and the second test module 31B, the processing module 21 determines whether the first test result and the second test result exceed the test threshold range. When the processing module 21 determines that both the first test result and the second test result do not exceed the test threshold range, the processing module 21 generates a test normal information, and the processing module 21 displays the test normal information through the screen unit of the human-computer interaction module 23. When the processing module 21 determines that one of the first test result and the second test result exceeds the test threshold range, the processing module 21 generates a test abnormality information, and the processing module 21 displays the test abnormality information through the screen unit of the human-machine interaction module 23. In this way, the user can grasp the state of the first test module 31A or the second test module 31B in the automatic test equipment 30 that needs to be calibrated by accuracy through the information presented by the screen unit.

Furthermore, the normal test information and the abnormal test information, together with the calibration time data of the automatic test equipment 30 and the signal measurement device 40, will be stored in the maintenance record data of the memory module 22, so as to leave a maintenance record for the user to review in the future.

In order to make it easier for the user to understand the process before calibrating the signal measuring device 40, the process when calibrating the signal measuring device 40, and the process of calibrating the automatic test equipment 30 after calibrating the signal measuring device 40, the memory module 22 stores an operation data, and the processing module 21 displays the operation data through the screen unit, so that the user can understand the matters that need to be paid attention to in each process.

By switching the operating mode selected by the workstation 20, the signal switching and verification device 10 of the present invention can correspondingly and quickly change the conduction state of the verification relay 12 and each of the test relays 13, so as to sequentially assist the user in calibrating the measurement accuracy of the signal measuring device 40 and assist in calibrating the accuracy of the test signal output by the automatic test equipment 30, and ensure that the automatic test equipment 30 is measured and calibrated under the premise that the signal measuring device 40 functions normally. When assisting the user in calibrating the measurement accuracy of the signal measuring device 40, the verification relay 12 of the present invention is controlled to be conductive, and the test relays 13 are controlled to be non-conductive. When assisting the user to calibrate the accuracy of the test signal output by the automatic test equipment 30, each of the test relays 13 of the present invention is controlled to be turned on, and the verification relay 12 is controlled to be turned off. Such a simple control method can greatly shorten the time for calibrating the automatic test equipment 30 and calibrating the signal measurement device 40, so that the packaging and testing equipment can be maintained more efficiently.

10: Signal switching and verification device

11: Voltage stabilizing element

12: Verify relay

13: Test relay

13A: First test relay

13B: Second test relay

14: Power port

20: Workstation

21: Processing module

22:Memory module

23: Human-computer interaction module

30:Automatic testing equipment

31:Test module

31A: First test module

31B: Second test module

32: Power module

40:Signal measurement device

100:Signal Verification System

FIG. 1A is a block diagram of a signal switching and verification device in use according to the present invention.

FIG. 1B is a block diagram of a signal verification system of the present invention.

FIG. 2 is a block diagram of an example of the signal switching and verification device of the present invention.

FIG. 3 is a schematic block diagram of the signal switching and verification device of the present invention in a verification measurement mode.

FIG. 4 is a schematic block diagram of the signal switching and verification device of the present invention in a verification accuracy mode.

10: Signal switching and verification device

11: Voltage stabilizing element

12: Verify relay

13: Test relay

20: Workstation

30: Automatic testing equipment

31: Test module

40:Signal measurement device

Claims (8)

A signal switching and verification device is provided for connection between a workstation, an automatic test equipment and a signal measuring device, wherein the automatic test equipment includes a plurality of test modules; the signal switching and verification device includes: a voltage regulator element, generating a verification voltage; a verification relay, electrically connected between the voltage regulator element and the signal measuring device, the driving end of the verification relay is electrically connected to the workstation to receive a switching signal; a plurality of test relays, respectively electrically connected between the test modules and the signal measuring device, the driving end of each of the test relays is electrically connected to the workstation to receive a switching signal; The terminal is electrically connected to the workstation to receive a switching signal; when the verification relay is switched on, the voltage regulator outputs the verification voltage to the signal measurement device through the conducting verification relay; when each of the test relays is switched on, each of the test modules outputs a test signal to the signal measurement device through each of the conducting test relays; when the verification relay is switched on, the test relays are switched off; when at least one of the test relays is switched on, the verification relay is switched off. A signal switching and verification device as described in claim 1, wherein the signal switching and verification device comprises: a power port, electrically connected to the power input end of the voltage regulator, one end of a coil of the verification relay and one end of a coil of the test relays, and receiving a power source; wherein the other end of the coil of the verification relay is the driving end of the verification relay, and the other end of the coil of each test relay is the driving end of each test relay; wherein the voltage regulator receives the power source to generate and output the verification voltage. The signal switching and verification device as described in claim 1, wherein: the voltage regulator element, the verification relay and the test relays are arranged on a circuit substrate. A signal verification system is provided for verifying a plurality of test modules of an automatic test equipment. The signal verification system comprises: a workstation; a signal measuring device; a signal switching and verification device, which is electrically connected to the workstation, the signal measuring device and each of the test modules of the automatic test equipment respectively; wherein the signal switching and verification device comprises: a voltage regulator element, which generates a verification voltage; a verification relay, which is electrically connected between the voltage regulator element and the signal measuring device, and the driving end of the verification relay is electrically connected to the workstation to receive a switching signal; a plurality of test relays, which are electrically connected to the test modules and The driving end of each test relay is electrically connected to the workstation to receive the switching signal; when the verification relay is switched on, the voltage regulator outputs the verification voltage to the signal measurement device through the conducting verification relay; when each test relay is switched on, each test module outputs a test signal to the signal measurement device through the conducting test relay; when the verification relay is switched on, the test relays are switched off; when at least one of the test relays is switched on, the verification relay is switched off. A signal verification system as described in claim 4, wherein the workstation comprises: a processing module; a memory module electrically connected to the processing module, storing a verification measurement mode data and a verification accuracy mode data; a human-machine interaction module electrically connected to the processing module; wherein, when the human-machine interaction module generates a switching mode signal, the processing module executes a verification measurement mode or a verification accuracy mode according to the switching mode signal; Wherein, under the verification measurement mode, the processing module generates a switching signal based on the verification measurement mode data to switch the verification relay to on and the test relays to off; wherein, under the verification accuracy mode, the processing module generates a switching signal based on the verification accuracy mode data to switch at least one of the test relays to on and the verification relay to off. The signal verification system as described in claim 5, wherein: the human-machine interaction module includes a screen unit and an input unit; when the signal measurement device receives the test signals, the signal measurement device generates a plurality of test results and transmits the test results back to the automatic test equipment; after the automatic test equipment receives the test results, the automatic test equipment transmits the test results to the processing module of the workstation; when the processing module receives the test results, the processing module displays the test results through the screen unit. The signal verification system as described in claim 6, wherein: the memory module stores an operation data; the processing module displays the operation data through the screen unit. A signal verification system as described in claim 6, wherein: the memory module stores a test threshold range; when the processing module receives the test results, the processing module determines whether the test results exceed the test threshold range; when the processing module determines that the test results do not exceed the test threshold range, the processing module generates a test normal information, and the processing module displays the test normal information through the screen unit; when the processing module determines that one of the test results exceeds the test threshold range, the processing module generates a test abnormal information, and the processing module displays the test abnormal information through the screen unit.

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