A digital electrical auxiliary test system

Abstract

The present invention discloses a digital electrical auxiliary test system, which includes two auxiliary test pens; the auxiliary test pen includes a microcontroller, a probe, a camera, a display screen and a power supply that are electrically connected; the probe is arranged at the end of the auxiliary test pen and can be in electrical contact with the test point; the camera is arranged at the front end of the auxiliary test pen and can collect the point position information at one end of the test point line, and the microcontroller can obtain the point position information at one end of the collected test point line and output the point position information at the other end of the test point line; the display screen can display the point position information of the test point line. The digital electrical auxiliary test system disclosed by the present invention no longer requires operators to look up the line calibration table, saves working time and simplifies the work content of the staff.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical product detection, and particularly to a digital electrical auxiliary test system. Background Art

[0002] For the conventional wire alignment of electrical products, operators need to use a multimeter to measure point by point according to the wiring diagram. The operators need to check the wiring diagram item by item and find the test points, which wastes a lot of time.

[0003] How to quickly and conveniently achieve wire alignment of electrical products is an urgent problem to be solved. Summary of the Invention

[0004] The present invention proposes a digital electrical auxiliary test system for the above problems.

[0005] The technical means adopted by the present invention are as follows:

[0006] A digital electrical auxiliary test system includes two auxiliary test pens;

[0007] The auxiliary test pen includes a microcontroller, a probe, a camera, a display screen and a power supply. The probe, the camera, the display screen and the power supply are all electrically connected to the microcontroller;

[0008] The probe is arranged at the end of the auxiliary test pen and can be in electrical contact with the test point;

[0009] The camera is arranged at the front end of the auxiliary test pen and can collect the point information at one end of the test point line and transmit the point information to the microcontroller;

[0010] The microcontroller can obtain the point information at one end of the collected test point line, and obtain and output the point information at the other end of the test point line according to the point information at one end of the test point line;

[0011] The display screen can display the point information of the test point line;

[0012] The power supply is used for power supply.

[0013] Furthermore, it further includes a storage module electrically connected to the microcontroller;

[0014] The storage module can store the wire alignment table and / or the test result data of the test points.

[0015] Furthermore, it further includes a wireless transmission module;

[0016] The wireless transmission module can send the potential information at the other end of the test point circuit obtained by one of the auxiliary test probes to the other auxiliary test probe, and display the potential information at the other end of the test point circuit on the display screen of the other auxiliary test probe.

[0017] Further, it also includes a wireless transmission module and a host computer, and a wire checking table is stored in the host computer;

[0018] The wireless transmission module is electrically connected to the microcontroller, and can transmit the potential information at one end of the test point circuit obtained by one of the auxiliary test probes to the host computer, and transmit the potential information at the other end of the test point circuit obtained by the host computer according to the potential information at one end of the test point circuit from the wire checking table to the other auxiliary test probe.

[0019] Further, the wireless transmission module can also transmit the test result data of the test point to the host computer.

[0020] Further, the probe of one of the auxiliary test probes is connected to the microcontroller through a probe potential detection circuit;

[0021] The probe potential detection circuit includes resistor R1, resistor R2, resistor R3, resistor R4, a comparator, a first inverter, a second inverter, and a triode; Resistor R1 and resistor R2 connected in series and resistor R3 and resistor R3 connected in series are connected in parallel between the power supply VCC and the ground. One end where resistor R1 and resistor R2 are connected is connected to the positive input terminal of the comparator. One end where resistor R3 and resistor R4 are connected is connected to the negative input terminal of the comparator and one end of the probe. The output terminal of the comparator is sequentially connected to the control terminal of the triode through the first inverter and the second inverter. The output terminal of the triode is connected to an input pin of the microcontroller;

[0022] The probe of the other auxiliary test probe is connected to the ground terminal of the microcontroller.

[0023] Further, it also includes a test point feedback module connected to the output terminal of the triode for feeding back the test result of the test point.

[0024] Further, the storage module is an SD card, the wireless transmission module is a WIFI or Bluetooth module, and the test point feedback module is a buzzer and / or an indicator light.

[0025] Further, it also includes a turntable electrically connected to the microcontroller.

[0026] Further, it also includes a power management module electrically connected to the microcontroller. The battery is a storage battery, and the power management module can perform charge and discharge management on the storage battery.

[0027] Compared with the prior art, the digital electrical auxiliary test system disclosed by the present invention has the following beneficial effects: Since a camera, a microcontroller and a display screen are provided on the auxiliary test probe, the camera can collect the position information of one end of the test point, and the microcontroller can obtain the position information of the other end of the test point, and display it on the display screen, which enables the operator to quickly know the position information of both ends of the test point and perform line calibration detection through the probe. This system no longer requires the operator to search for a line calibration table, saving working time and simplifying the work content of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic structural diagram of the digital electrical auxiliary test system disclosed by the present invention;

[0029] Figure 2 is a schematic circuit diagram of the auxiliary test probe in the digital electrical auxiliary test system disclosed by the present invention;

[0030] Figure 3 is a schematic diagram of the communication between the digital electrical auxiliary test system disclosed by the present invention and the host computer;

[0031] Figure 4 is a schematic circuit diagram of the connection of the probe in the digital electrical auxiliary test system disclosed by the present invention;

[0032] Figure 5 is a flow chart of the test point test of the digital electrical auxiliary test system disclosed by the present invention;

[0033] In the figure: 1. Auxiliary test probe; 10. Microcontroller; 11. Probe; 12. Camera; 13. Display screen; 14. Power supply; 15. Storage module; 16. Wireless transmission module; 17. Host computer; 18. Buzzer; 19. Dial. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0034] As Figure 1 shown, the digital electrical auxiliary test system disclosed by the present invention includes two auxiliary test probes 1, namely the first auxiliary test probe 1A and the second auxiliary test probe 1B;

[0035] As Figure 2 shown, the auxiliary test probe 1 includes a microcontroller 10, a probe 11, a camera 12, a display screen 13 and a power supply 14, and the probe 11, the camera 12, the display screen 13 and the power supply 14 are all electrically connected to the microcontroller 10;

[0036] The probe 11 is arranged at the end of the auxiliary test probe 1 and can be in electrical contact with the test point;

[0037] The camera 12 is disposed at the front end of the auxiliary test pen 1 and can collect the position information of one end of the test point line and transmit the position information to the microcontroller 10; the microcontroller 10 can obtain the position information of one end of the collected test point line and obtain and output the position information of the other end of the test point line according to the position information of one end of the test point line;

[0038] The display screen 13 can display the position information of the test point line;

[0039] The power supply 14 is used for power supply.

[0040] The process of line calibration detection using the disclosed digital electrical auxiliary test system of the present invention is as follows: One of the auxiliary test pens (for example, the first auxiliary test pen 1A) is close to the detection point at one end of the line to be detected (test point line). Each detection point on the electrical product (circuit board or wire) has a corresponding label, and the position information of the corresponding detection point can be represented by this label. When the auxiliary test pen is close to the detection point, the camera at the front end of the auxiliary pen can collect an image of the detection point to obtain the corresponding position information and transmit the position information to the microcontroller. The microcontroller can obtain and output the position information of the other end of the test point line according to the obtained position information; and display the position information of the other end of the test point line on the display screen, as Figure 3 shown.

[0041] Since the disclosed digital electrical auxiliary test system of the present invention is provided with a camera, a microcontroller and a display screen on the auxiliary test pen, the camera can collect the position information of one end of the test point, the microcontroller can obtain the position information of the other end of the test point, and by displaying on the display screen, it is convenient for the operator to quickly know the position information at both ends of the test point and perform line calibration detection through the probe. This system enables the operator not to need to look up the line calibration table, saving working time and simplifying the work content of the staff.

[0042] Further, it further includes a storage module 15 electrically connected to the microcontroller 10;

[0043] The storage module 15 can store the line calibration table and / or the test result data of the test point.

[0044] Specifically, in this application, the microcontroller uses the F407 series single-chip microcomputer. The storage module can be an internal memory or an external memory. The storage module stores a wiring calibration table for wiring calibration. When the microcontroller obtains the point information at one end of the test point, the microcontroller can search for the corresponding point information in the wiring calibration table in the storage module, that is, obtain the point information at the other end of the test point, and send the point information to the display screen for display, facilitating the operator to know the point information at the corresponding two ends of the test point for wiring calibration detection. At the same time, the microcontroller can also obtain the test result of the test point and store the test result of the test point in the storage module, so that the subsequent operator can perform operations such as maintenance on the test point according to the test result. Preferably, the storage module 15 is an SD card. The SD card is connected to the microcontroller using the SPI serial bus. The microcontroller can read and write files in the SD card; it is used to store information such as wiring tables and configuration files, and using an SD card is also convenient for carrying and exporting data, so as to facilitate subsequent analysis operations based on the test results.

[0045] In this embodiment, the display screen 13 uses an OLED screen, preferably a 128*32 or 128*64 dot-matrix screen. The OLED display screen is connected to the microcontroller using the IIC serial bus; it is used to display the point information during the test of electrical products.

[0046] Furthermore, as Figure 2As shown, the auxiliary test pen also includes a wireless transmission module 16; the wireless transmission module can send the potential information at the other end of the test point line obtained by one of the auxiliary test pens to the other auxiliary test pen, and display the potential information at the other end of the test point line on the display screen of the other auxiliary test pen. Specifically, in this embodiment, the microcontroller is also connected to a wireless transmission module such as WIFI or Bluetooth. When the wireless transmission module is Bluetooth, the microcontroller and the Bluetooth are connected using a TTL serial bus. There are three ways for the auxiliary test pen in the disclosed digital electrical auxiliary test system to obtain the potential information at one end of the test point, and obtain the potential information at the other end based on the potential information at one end and display it on the display screen: The first way is to only display the potential information at the other end of the obtained test point on one auxiliary test pen. For example, by contacting one end of the test point with the probe of the first auxiliary test pen 1A, the camera on the first auxiliary test pen 1A collects the potential information of the test point and sends it to the microcontroller of the first auxiliary test pen 1A. The microcontroller of the first auxiliary test pen 1A searches in the wire calibration table in the storage module for the potential information at the other end corresponding to this test point, and displays the found potential information at the other end on the display screen of the first auxiliary test pen 1A. The operator can, according to the content displayed on the display screen of the first auxiliary test pen 1A, probe the probe of the second auxiliary test pen 1B at the corresponding test point position to determine the continuity of the current test point line; The second way is to display the potential information at one end of the obtained test point on one auxiliary test pen and display the potential information at the other end of the obtained test point on the other auxiliary test pen. For example, by contacting one end of the test point with the probe of the first auxiliary test pen 1A, the camera on the first auxiliary test pen 1A collects the potential information of the test point and sends it to the microcontroller of the first auxiliary test pen 1A, and displays this potential information on the display screen of the first auxiliary test pen 1A. The microcontroller of the first auxiliary test pen 1A searches in the wire calibration table in the storage module for the potential information at the other end corresponding to this test point, and sends the found potential information at the other end to the second auxiliary test pen through the wireless transmission module, and displays it on the display screen of the second auxiliary test pen 1B. The operator can, according to the content displayed on the display screen of the second auxiliary test pen 1B, probe the probe of the second auxiliary test pen 1B at the corresponding test point position to determine the continuity of the current test point line;The third method is to display the potential information corresponding to both ends of the obtained test point on one (or two) auxiliary test probes. For example, the probe of the first auxiliary test probe 1A contacts one end of the test point, the camera on the first auxiliary test probe 1A collects the potential information of the test point and sends it to the microcontroller in the first auxiliary test probe 1A. The microcontroller in the first auxiliary test probe 1A looks up the potential information of the other end corresponding to the test point position from the line calibration table in the storage module, and simultaneously displays the information of both ends of the test point on the display screen of the first auxiliary test probe 1A. The operator can, according to the content displayed on the display screen of the first auxiliary test probe 1A, probe the corresponding test point position with the probe of the second auxiliary test probe 1B to determine the continuity of the current test point circuit. In the third display method, the first auxiliary test probe can also send the information of both ends of the test point to the second auxiliary test probe through the wireless transmission module and display it on the display screen of the second auxiliary test probe 1B. The operator can, according to the content displayed on the display screen of the second auxiliary test probe 1B, probe the corresponding test point position with the probe of the second auxiliary test probe 1B to determine the continuity of the current test point circuit.;

[0047] Further, as Figure 3 shown, it further includes a wireless transmission module 16 and a host computer 17, and the host computer 17 stores a line calibration table;

[0048] The wireless transmission module 16 is electrically connected to the microcontroller 10 and can transmit the potential information of one end of the test point circuit obtained by one of the auxiliary test probes to the host computer 17 and transmit the potential information of the other end of the test point circuit obtained by the host computer 17 from the line calibration table according to the potential information of one end of the test point circuit to the other auxiliary test probe.

[0049] Specifically, the microcontroller is also connected with wireless transmission modules such as WIFI or Bluetooth. When the wireless transmission module is Bluetooth, the microcontroller and the Bluetooth are connected using a TTL serial bus. The wireless transmission module can transmit the point position information at one end of the test point line acquired by the microcontroller to the upper computer. The upper computer stores a wire calibration table. After obtaining the point position information sent by the microcontroller, the upper computer can obtain the point position information at the other end of the test point from the wire calibration table, and transmit the point position information at the other end to the microcontroller through the wireless transmission module, so as to display it on the display screen. Specifically, for example, by using the probe of the first auxiliary test pen 1A to contact one end of the test point, the camera on the first auxiliary test pen 1A collects the point position information of the test point and sends it to the microcontroller in the first auxiliary test pen 1A, and displays the point position information on the display screen of the first auxiliary test pen 1A. The first auxiliary test pen 1A sends the point position information to the upper computer through the wireless transmission module. The upper computer stores a wire calibration table. After obtaining the point position information sent by the first auxiliary test pen 1A, the upper computer can obtain the point position information at the other end of the test point from the wire calibration table, and transmit the point position information at the other end to the second auxiliary test pen 1B through the wireless transmission module. The operator can probe the corresponding test point position with the probe of the second auxiliary test pen 1B according to the content displayed on the display screen of the second auxiliary test pen 1B to judge the continuity of the current test point line. By setting the wireless transmission module, the digital electrical auxiliary test system disclosed in the present invention can communicate with the upper computer in real time, so as to use the digital electrical auxiliary test system to detect different electrical products. That is, different electrical product wire calibration tables can be stored in the upper computer, so as to facilitate the search for point position information and real-time transmission to the microcontroller for display.

[0050] Further, the wireless transmission module 16 can also transmit the test result data of the test point to the upper computer 17. The wireless transmission module can also transmit the test result of the test point acquired by the microcontroller to the upper computer, so as to facilitate the upper computer to perform real-time analysis or storage, so that subsequent operators can analyze or repair the test point according to the test result. At the same time, the upper computer can also perform system upgrade and debugging on the digital electrical auxiliary test system through the wireless transmission module.

[0051] Further, the probe of one of the auxiliary test pens is connected to the microcontroller through a probe potential detection circuit; as Figure 4As shown, the probe potential detection circuit includes resistor R1, resistor R2, resistor R3, resistor R4, comparator IC1, first inverter IC2, second inverter IC3, and triode T1; resistor R1 and resistor R2 connected in series are connected in parallel with resistor R3 and resistor R3 connected in series between power supply VCC and ground. One end where resistor R1 and resistor R2 are connected is connected to the positive input terminal of the comparator. One end where resistor R3 and resistor R4 are connected is connected to the negative input terminal of the comparator and one end of the probe. The output terminal of the comparator is sequentially connected to the control terminal of the triode through the first inverter and the second inverter. The output terminal of the triode is connected to an input pin of the microcontroller; the probe of the other auxiliary test lead is connected to the ground terminal of the microcontroller.

[0052] Specifically, when using the two auxiliary test leads disclosed in the present invention to detect the test point circuit, since the probe of one auxiliary test lead is connected to the microcontroller through the probe potential detection circuit, and the probe potential detection circuit is a voltage comparison output circuit composed of a comparator, an inverter, and a triode. As shown specifically, the probe 11A of the first (second) auxiliary test lead is connected between resistor R3 and resistor R4, and the test probe 11B of the second (first) auxiliary test lead is connected to ground. When the two auxiliary test leads are respectively in contact with the detection points at both ends of the test point circuit, the measurement wire between the two probes can be regarded as a resistor, which is connected in parallel with resistor R4, and resistor R1 = R3. When the measured resistor is less than R2*R4 / (R4 - R2), that is, the voltage at both ends of R4 is less than VCC / (R1 + R2)*R2, the comparator outputs a high level, otherwise it outputs a low level. The output level of the comparator is sorted by the inverter and then drives the triode switch, and the output signal (high or low level) is transmitted to the GPIO port of the microcontroller, thereby obtaining the test result data of the test point.

[0053] Furthermore, it further includes a test point feedback module electrically connected to the microcontroller 10 for feeding back the test result of the test point. The test point feedback module is a buzzer 18 and / or an indicator light. Preferably, the buzzer uses an active buzzer. Specifically, the output terminal of the triode is also connected to a buzzer or an indicator light. The output level of the comparator is sorted by the inverter and then drives the triode switch, so that the buzzer or the indicator light can act, facilitating the operator to directly know the test result.

[0054] Furthermore, it further includes a rotary knob 19 electrically connected to the microcontroller 10. Multiple wiring tables of products to be tested can be stored in the storage module or in the upper computer. By setting the rotary knob, the microcontroller can be controlled to select the product to be tested and find the corresponding wiring table according to the product to be tested.

[0055] Further, it further includes a power management module electrically connected to the microcontroller 10. The battery 14 is a storage battery. In this embodiment, the storage battery is a 3.7V lithium battery, and the power management uses a TYPE-C interface for 1A charge and discharge management. The power management module can perform charge and discharge management on the storage battery, and the storage battery can supply power to the microprocessor, OLED display screen, Bluetooth, etc.

[0056] There may be a one-to-many situation at both ends of the test point line disclosed in the present invention. When the test point line is in a one-to-many situation, each point information can be displayed on the display screen at intervals of a certain time in sequence, so that the operator can perform detection according to the corresponding point information, or it can also be switched by turning the dial.

[0057] The specific process of using the digital electrical auxiliary test system disclosed in the present invention to detect the test points of electrical products is as follows. As Figure 5 shown, it includes the following steps:

[0058] 1. Start the test;

[0059] 2. Select the product model;

[0060] Specifically, the digital electrical auxiliary test system disclosed in the present invention can be used to detect different products. The wiring table of different products can be stored in the storage module (host computer). Before starting the product detection, the product to be tested can be selected on the host computer or the auxiliary test pen;

[0061] 3. Use one of the auxiliary test pens (the first auxiliary test pen) to approach the test point at one end of the test point line to be tested, and the camera of the auxiliary test pen collects the point information (wire or terminal line number) of the current test point;

[0062] 4. The first auxiliary test pen displays the point information of the current test point;

[0063] 5. The second auxiliary test pen displays the point information of the other end of the current test point;

[0064] 6. The probe of the first auxiliary test pen contacts the detection point (the first wire or terminal) of the test point line, and the probe of the second auxiliary test pen contacts the detection point at the other end of the test point line;

[0065] 7. If the buzzer or indicator light on the first auxiliary test pen or the second auxiliary test pen changes state, it means the test passes, the display screen shows PASS, and the test result is stored and uploaded;

[0066] 8. Measure the next test point.

[0067] Some functions on the auxiliary test pen in the present invention can be selectively started according to needs. For example, when one of the auxiliary test pens serves as the main test pen, components such as the camera or display screen on the other auxiliary test pen can be not started. The specific implementation method can be achieved by using conventional methods in the art, and the present invention will not be described in detail.

[0068] As described above, the above are only the preferred specific implementation manners of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. A digital electrical auxiliary test system, characterized by: Includes two auxiliary test leads; The auxiliary test probe includes a microcontroller, a probe, a camera, a display screen and a power supply, and the probe, the camera, the display screen and the power supply are all electrically connected to the microcontroller; The probe is arranged at the end of the auxiliary test lead and can be in electrical contact with the test point; The camera is arranged at the front end of the auxiliary test probe and is capable of collecting point information at one end of the test point line and transmitting the point information to the microcontroller; The microcontroller is capable of acquiring the collected point position information of one end of the test point line, and obtaining and outputting the point position information of the other end of the test point line based on the point position information of one end of the test point line; The display screen can display the point information of the test point circuit; The power supply is used for supplying power; Also included is a storage module electrically connected to the microcontroller; The storage module is capable of storing a calibration table and / or test point test result data; The invention also includes a pulsator electrically connected to the microcontroller.

2. The digital electrical auxiliary test system according to claim 1, characterized in that: Also includes a wireless transmission module; The wireless transmission module can send the point information of the other end of the test point line obtained by one auxiliary test probe to another auxiliary test probe, and display the point information of the other end of the test point line on the display screen of the other auxiliary test probe.

3. The digital electrical auxiliary test system according to claim 1, characterized in that: It also includes a wireless transmission module and a host computer, wherein the host computer stores a calibration table; The wireless transmission module is electrically connected to the microcontroller, and is capable of transmitting the point position information of one end of the test point line obtained by one of the auxiliary test probes to the host computer, and transmitting the point position information of the other end of the test point line obtained by the host computer from the calibration table based on the point position information of one end of the test point line to the other auxiliary test probe.

4. The digital electrical auxiliary test system according to claim 3, characterized in that: The wireless transmission module can also transmit the test result data of the test point to the host computer.

5. The digital electrical auxiliary test system according to any one of claims 1 to 4, characterized in that: The probe of one of the auxiliary test leads is connected to the microcontroller via a probe potential detection circuit; The probe potential detection circuit includes a resistor R1, a resistor R2, a resistor R3, a resistor R4, a comparator, a first inverter, a second inverter, and a transistor; the resistors R1 and R2 connected in series and the resistors R3 and R4 connected in series are arranged in parallel between a power supply VCC and a ground, one end of the resistors R1 and R2 connected is connected to the positive input end of the comparator, the end of the resistors R3 and R4 connected is connected to the negative input end of the comparator and one end of the probe, the output end of the comparator is connected to the control end of the transistor through the first inverter and the second inverter in sequence, and the output end of the transistor is connected to an input pin of the microcontroller; Another probe of the auxiliary test probe is connected to the ground terminal of the microcontroller.

6. The digital electrical auxiliary test system according to claim 5, characterized in that: It also includes a test point feedback module connected to the output end of the transistor and used to feed back the test result of the test point.

7. The digital electrical auxiliary test system according to claim 2, characterized in that: The storage module is an SD card, the wireless transmission module is a WIFI or Bluetooth module, and the test point feedback module is a buzzer and / or an indicator light.

8. The digital electrical auxiliary test system according to claim 1, characterized in that: It also includes a power management module electrically connected to the microcontroller, the power source is a battery, and the power management module can manage the charge and discharge of the battery.

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