DC power supply performance parameter testing method

Abstract

The present invention relates to a method for testing the performance parameters of a DC power supply, which includes the following steps. First, loading is performed by a manipulator. Then, positioning and clamping are carried out through a tooling fixture. Secondly, the insulation parameters, power parameters, and voltage signals of the DC power supply are measured respectively by probes. Again, after the measurement is completed, the DC power supply is taken out by the manipulator. As a further improvement of the above technical solution: for the loading step, the loading and unloading manipulator controls the loading and unloading suction head to adsorb / claw the DC power supply onto the workpiece positioning process concave table; the present invention is reasonably designed, compact in structure and convenient to use.

Description

Technical Field

[0001] The present invention relates to a method for testing performance parameters of a DC power supply. Background Art

[0002] At present, for the systems and methods of testing the output voltage of DCDC module power supplies with previous dedicated connectors, it is simply a connection test, and its test accuracy is low. Because no matter how small the contact resistance of the connector is, there will be a voltage drop phenomenon under large currents, and this kind of error is unacceptable for high-precision tests. The significance of the method of the present invention is to divide the power and voltage signals into two paths. The power part still uses the traditional connector terminals, and an additional set of spring probes is used to specifically test the output pins of the module. Since the actual current generated by the multimeter when testing voltage is extremely small, and the contact resistance of the spring probes is also extremely small, the voltage drop generated can be ignored, effectively improving the test accuracy. In the traditional method, since the alligator clip and the converter pin are in point contact, it is extremely easy to cause the converter to be damaged or the internal circuit to have a "soft breakdown" and other situations due to poor contact of the clip, greatly increasing the human error and the scrap rate of products, thus sharply increasing the production cost. Although CN201520454637.8, a special test bench for full-type series DC-DC converters, provides a set of solutions, its detection accuracy is still not high enough and it is still not suitable for high-precision fields such as aerospace remote control, inertial navigation systems, and deep-sea exploration.

[0003] In addition, the existing test technologies rely heavily on manual labor, with high cost expenditures, are prone to mismeasurement and cause product damage, and are also somewhat dangerous to operators. When testing with electrodes held by humans, not only is it easy to be electrocuted by high voltage, but it is also easier to cause internal breakdown of the module due to accidental touch. When using automated testing, only need to place the module on a specific fixture and then connect it to the test instrument. The tester automatically switches the test points, and the efficiency is also improved. Summary of the Invention

[0004] Generally speaking, the technical problem to be solved by the present invention is to provide a DCDC power module test system and method. No matter how small the contact resistance of the traditional connector is, there will be a voltage drop phenomenon under large currents, and this kind of error is unacceptable for high-precision military tests. The significance of the test of the present invention is to divide the power and voltage signals into two paths. The power part still uses the traditional connector terminals, and an additional set of spring probes is used to specifically test the output pins of the module. Since the actual current generated by the multimeter when testing voltage is extremely small, and the contact resistance of the spring probes is also extremely small, the voltage drop generated can be ignored, effectively improving the test accuracy. Due to the adoption of an ergonomic action structure, the clamping efficiency is also improved. The present invention adopts an action mode similar to pulling a trigger, which can effectively improve the test efficiency of the module.

[0005] To solve the above problems, the technical solution adopted by the present invention is as follows:

[0006] A method for testing the performance parameters of a DC power supply and a DCDC power supply module, comprising the following steps. First, load materials through a manipulator; then, perform positioning and clamping through a tooling; secondly, measure the insulation parameters, power parameters, and voltage signals of the DC power supply respectively through a probe; thirdly, after the measurement is completed, take out the DC power supply through the manipulator.

[0007] As a further improvement of the above technical solution:

[0008] For the loading step, the loading and unloading manipulator controls the loading and unloading suction head to adsorb / claw the DC power supply to the workpiece positioning process concave table;

[0009] For the step of positioning and clamping by the tooling, first, pull the gun wrench, and the gun trigger overcomes the pulling force of the gun return spring and longitudinally slides in the horizontal channel and the guiding positioning groove. At the same time, the gun bolt body is pulled back along the gun bolt guiding rear cover; then, the gun bolt body is pulled to move along the long groove of the connecting rod through the driving cross shaft, so as to realize the backward swing of the upper movable cover plate; secondly, place the spring probe into the installation process groove; thirdly, release the gun wrench, and under the action of the restoring force of the gun return spring and the gravity of the upper movable cover plate, the upper movable cover plate swings forward, and the guiding arc angle enters the rear part of the installation process groove, so that the pushing ejector rod pushes the spring probe forward; immediately afterwards, the front process groove pushes the DC power supply forward and positions it; then, using the distance difference from the front process groove, the spring probe contacts the test point of the DC power supply; then, the front positioning manipulator drives the measuring probe to contact the test point of the DC power supply through the front measuring head.

[0010] For the step of measuring the insulation parameters of the DC power supply respectively through the probe, first, start the single-chip microcomputer; then, when the single-chip microcomputer detects an external high-voltage input, control the on / off of the relay according to the preset programming sequence to realize the test of each insulation test point by the probe of the detection device.

[0011] For the measurement steps of the power parameters and voltage signals of the DC power supply through the probes respectively, the spring probe measures the voltage signal through a multimeter, and the connector terminal measures the power parameters through the front probe. This device is mainly used to test the output voltage of the DCDC module power supply. Compared with the previous special connectors, the method of the present invention has significantly improved accuracy. Because no matter how small the contact resistance of the connector is, there will be a voltage drop phenomenon under large current, which is an unacceptable error for high-precision testing. The significance of the method of the present invention is to divide the power and voltage signals into two paths. The power part still uses the traditional connector terminal, and an additional set of spring probes is used to specifically test the output pins of the module. Since the actual current generated by the multimeter when testing the voltage is extremely small, and the contact resistance of the spring probe is also extremely small, the voltage drop generated can be ignored, effectively improving the test accuracy. The present invention has high test accuracy, a more reasonable ergonomic design, and high test efficiency.

[0012] The core of the test device of the present invention is a 51 single-chip microcomputer. It detects the high-voltage (higher than the safety voltage, such as 500V) input through an external detection circuit. Once the voltage input is detected, it starts to automatically switch the relay to work until the test is completed.

[0013] Using automated testing, only need to place the module on a specific fixture and then connect it to the test instrument. The tester automatically switches the test points, and the efficiency is also improved. This device is mainly used to automatically test the electrical insulation performance of the power supply module. Compared with the previous manual testing, the safety performance of the automated testing is significantly improved: when testing with an electrode held by a person, not only is it easy to be electrocuted by high voltage, but it is more likely to cause internal breakdown of the module due to accidental touch. While using automated testing, only need to place the module on a specific fixture and then connect it to the test instrument. The tester automatically switches the test points, and the efficiency is also improved.

[0014] The present invention is reasonable in design, low in cost, strong and durable, safe and reliable, simple to operate, time-saving and labor-saving, cost-saving, compact in structure and convenient to use. Brief Description of the Drawings

[0015] Figure 1 is the overall structural schematic diagram of the present invention.

[0016] Figure 2 is the structural schematic diagram of the first perspective of the present invention.

[0017] Figure 3 is the structural schematic diagram of the second perspective of the present invention.

[0018] Figure 4 is the exploded structural schematic diagram of the present invention.

[0019] Figure 5 is the structural schematic diagram of the control of the present invention.

[0020] Wherein: 1. Auxiliary tooling; 2. Positioning tooling; 3. Loading and unloading manipulator; 4. Loading and unloading suction head; 5. Bottom suction head; 6. Detection device; 7. Front positioning manipulator; 8. Front measuring head; 9. Measuring probe; 10. Gun handle frame; 11. Gun handle rear seat; 12. Gun handle sub-frame; 13. Bolt positioning pedestal; 14. Process vertical through hole; 15. Gun trigger; 16. Gun wrench; 17. Force regulator; 18. Adjusting positioning slot hole; 19. Gun return spring; 20. Guide positioning slot; 21. Link arm; 22. Link long slot; 23. Bolt guide rear cover; 24. Bolt body; 25. Installation process slot; 26. Upper movable cover plate; 27. Front process groove; 28. Push ejector rod; 29. Guide arc angle; 30. Pulling spring; 31. Workpiece positioning process concave table; 32. Longitudinal front groove; 33. Front probe; 34. Pick-up process slot. Specific implementation manner

[0021] As Figures 1-4 shown, the DCDC power module test system of this embodiment includes a positioning tooling 2 for placing the DCDC power module, an auxiliary tooling 1 arranged on one side of the positioning tooling 2, a loading and unloading manipulator 3 arranged on the auxiliary tooling 1, a loading and unloading suction head 4 arranged at the front end of the loading and unloading manipulator 3 and used for replacing the DCDC power module to be tested, a bottom suction head 5 arranged below the positioning tooling 2 and used for adsorbing or taking out the DCDC power module, a detection device 6 arranged on the auxiliary tooling 1, a front positioning manipulator 7 arranged on the auxiliary tooling 1 and located at the front end of the positioning tooling 2, a front measuring head 8 arranged at the front end of the front positioning manipulator 7, and a measuring probe 9 arranged at the front end of the front measuring head 8 and used for electrically contacting the DCDC power module.

[0022] The positioning tooling 2 includes a fixedly arranged pistol grip frame 10, a pistol grip front support and a pistol grip rear seat 11 respectively arranged on the pistol grip frame 10, a pistol grip body frame 12 arranged on the pistol grip frame 10 and the pistol grip rear seat 11, a horizontal channel arranged between the pistol grip body frame 12 and the pistol grip front support, a pistol trigger 15 movably arranged in the horizontal channel, a bolt positioning pedestal 13 arranged at the front end of the pistol grip body frame 12 and used for placing the DCDC power module, a process vertical through hole 14 arranged on the bolt positioning pedestal 13 and below the DCDC power module, a pistol wrench 16 arranged at the rear side of the lower end of the pistol trigger 15 and used for manual or motorized control, a force regulator 17 arranged at the lower end of the bolt positioning pedestal 13 and directly in front of the pistol trigger 15, adjustment positioning slot holes 18 distributed on the force regulator 17, a pistol return spring 19 with one end located in the adjustment positioning slot holes 18 and the other end connected to the front end of the pistol trigger 15, a guiding positioning slot 20 arranged on the pistol grip body frame 12 and in which the upper rear part of the pistol trigger 15 longitudinally slides, a bolt body 24 located above the pistol grip body frame 12 and connected to the top of the pistol trigger 15, two symmetric connecting rod arms 21 with roots distributed and hinged on both sides of the rear part of the pistol grip body frame 12, a connecting rod long slot 22 obliquely arranged on the connecting rod arms 21, a driving cross shaft arranged on the bolt body 24 and with the corresponding end located in the connecting rod long slot 22, a bolt guiding rear cover 23 arranged at the rear part of the pistol grip body frame 12 and in which the bolt body 24 slides in its lower through slot, mounting process slots 25 arranged side by side at the front end of the bolt body 24 and used for placing spring probes, an upper movable cover plate 26 with the lower end hinged on the horizontal bent arm of the connecting rod arm 21 and being L-shaped, a front process groove 27 vertically distributed on the front end face of the vertical plate of the upper movable cover plate 26, a pushing ejector rod 28 arranged on the lower end face of the upper movable cover plate 26 and corresponding to the corresponding mounting process slot 25 and used for pushing the spring probe forward, a guiding arc angle 29 arranged at the cantilever head of the pushing ejector rod 28 and used for guiding into the mounting process slot 25, and a pulling spring 30 arranged between the pushing ejector rod 28 and the upper movable cover plate 26.

[0023] A workpiece positioning process concave table 31 for placing the DCDC power module is arranged on the bolt positioning pedestal 13. A longitudinal front groove 32 for placing the front probe 33 of the detection device 6 is longitudinally arranged at the front end of the workpiece positioning process concave table 31. A pick-up process slot 34 for taking out the front probe 33 is arranged below the longitudinal front groove 32.

[0024] The detection device 6 includes a probe respectively used for measuring the electrical insulation of the DCDC power module and an insulation test circuit; the insulation test circuit includes a triode Q1, a zener diode D1, a single-chip microcomputer, a number of triodes Q2, and a number of relays.

[0025] As a specific method, such as Figure 5The external detection circuit detects that the high-voltage input is grounded through the voltage-regulating diode D1 and through the base of the triode Q1. The emitter of the triode Q1 is grounded, and the collector of the triode Q1 is connected to the pin 1 of the single-chip microcomputer; the pin 40 of the single-chip microcomputer is connected to the power supply, and the pin 20 of the single-chip microcomputer is grounded; the output pin of the single-chip microcomputer is connected to the base of the triode Q2. The emitter of the triode Q2 is grounded, and the collector of the triode Q2 is connected to the relay control coil and electrically connected to the power supply. The normally open contact of the relay is connected to the test circuit for testing the high voltage and several test points.

[0026] The single-chip microcomputer turns on and off several triodes Q2 to realize the test switching of the corresponding test points.

[0027] The test circuit is electrically connected to the measurement point of the DCDC power module through the corresponding probe.

[0028] The detection device 6 includes a front probe 33 for detecting the power of the DCDC power module and electrically connected to the detection connector terminal, and a spring probe for detecting the voltage signal of the DCDC power module; the spring probe is electrically connected to the multimeter through a wire.

[0029] The method for testing the performance parameters of the DC power supply in this embodiment includes the following steps. First, load the material through the manipulator; then, position and clamp it through the tooling; secondly, measure the insulation parameters, power parameters, and voltage signals of the DC power supply through the probes respectively; thirdly, after the measurement is completed, take out the DC power supply through the manipulator.

[0030] For the loading step, the loading and unloading manipulator 3 controls the loading and unloading suction head 4 to adsorb / claw-hold the DC power supply onto the workpiece positioning process concave platform 31.

[0031] For the step of positioning and clamping by the tooling, first, pull the gun wrench 16, and the gun trigger 15 slides longitudinally in the horizontal channel and the guiding positioning groove 20 against the pulling force of the gun return spring 19. At the same time, the gun bolt body 24 is pulled back along the gun bolt guiding rear cover 23; then, the gun bolt body 24 is pulled to move along the connecting rod long groove 22 through the driving cross shaft, so as to realize the backward swing of the upper movable cover plate 26; secondly, place the spring probe into the installation process groove 25; thirdly, release the gun wrench 16. Under the action of the restoring force of the gun return spring 19 and the gravity of the upper movable cover plate 26, the upper movable cover plate 26 swings forward, and the guiding arc angle 29 enters the rear part of the installation process groove 25, so that the pushing ejector rod 28 pushes the spring probe forward; immediately afterwards, the front process groove 27 pushes the DC power supply forward and positions it; then, using the distance difference from the front process groove 27, the spring probe contacts the test point of the DC power supply; then, the front positioning manipulator 7 drives the measurement probe 9 to contact the test point of the DC power supply through the front measurement head 8.

[0032] For the steps of separately measuring the insulation parameters of a DC power supply through a probe, first, start the single-chip microcomputer; then, when the single-chip microcomputer detects an external high voltage input, control the on / off of the relay according to a preset programming sequence to enable the probe of the detection device 6 to test each insulation test point.

[0033] For the steps of separately measuring the power parameters and voltage signals of a DC power supply through a probe, the spring probe measures the voltage signal through a multimeter, and the connector terminal measures the power parameters through the front probe 33.

[0034] The auxiliary tooling 1 realizes the installation of the measuring device, the positioning tooling 2 realizes the positioning of the DCDC DC power supply module, the loading and unloading manipulator 3 realizes automatic loading and unloading, the loading and unloading suction head 4 realizes adsorption and positioning during detection, and reverse blowing when picking up materials. The bottom suction head 5 or the manipulator realizes the lossless transportation of the power supply. The detection device 6 is a common detection device. The front positioning manipulator 7, the front measuring head 8, and the measuring probe 9 realize the measurement of general power. The gun handle frame 10, the gun handle rear seat 11, and the gun handle sub-frame 12 realize support. The vertical through hole 14 in the gun bolt positioning base 13 facilitates the lifting of the lower suction nozzle. The gun trigger 15 realizes the guiding linkage drive. The gun wrench 16 realizes the drive input. The force regulator 17 adjusts the speed according to the workpiece situation. The adjustment positioning slot 1 realizes the length adjustment of the gun return spring 19 to realize the force adjustment. The guiding positioning slot 20 realizes the guiding. The connecting rod arm 21 and the connecting rod long slot 22 realize the linkage. The gun bolt guiding rear cover 23 realizes the guiding. The gun bolt body 24 realizes the linkage. The installation process slot 25 realizes the guiding drive. The upper movable cover plate 26 realizes the downward pressure to guide the spring probe, and at the same time realizes the swing through the swing, and at the same time realizes the downward swing by using its own weight and the spring force. The front process groove 27 realizes the side push positioning of the power supply. A buffer pad can be added to reduce the impact loss of the power supply. The pushing ejector rod 28 realizes the subsequent pushing of the probe. The guiding arc angle 29 facilitates the pushing ejector rod to enter the groove. The pulling spring 30 controls the ejector rod to avoid downward swing due to gravity. The workpiece positioning process concave platform 31 facilitates positioning. The longitudinal front groove 32 facilitates the guiding of the front probe 33. The picking process groove 34 facilitates the manual or mechanical picking.

[0035] The present invention is fully described for a clearer disclosure, and the prior art will not be listed one by one.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; it is obvious for those skilled in the art to combine multiple technical solutions of the present invention. And these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for testing the performance parameters of a DC power supply, characterized in that : It includes the following steps. First, load materials by a manipulator. Then, position and clamp using a tooling fixture. Secondly, measure the insulation parameters, power parameters, and voltage signals of the DC power supply respectively through a probe. Thirdly, after the measurement is completed, take out the DC power supply by the manipulator. For the loading step, the loading and unloading manipulator (3) controls the loading and unloading suction head (4) to adsorb or grip the DC power supply with a gripper and place it on the workpiece positioning process concave platform (31). For the step of positioning and clamping using the tooling fixture, first, pull the gun wrench (16), and the gun trigger (15) slides longitudinally in the horizontal channel and the guiding positioning groove (20) against the pulling force of the gun return spring (19). At the same time, the bolt body (24) is pulled back along the bolt guiding rear cover (23). Then, the bolt body (24) is pulled to move along the connecting rod long groove (22) through the driving cross shaft, so as to realize the backward swing of the upper movable cover plate (26). Secondly, place the spring probe into the installation process groove (25). Thirdly, release the gun wrench (16). Under the restoring force of the gun return spring (19) and the gravity of the upper movable cover plate (26), the upper movable cover plate (26) swings forward, and the guiding arc angle (29) enters the rear part of the installation process groove (25), so that the pushing ejector rod (28) pushes the spring probe forward. Immediately afterwards, the front process groove (27) pushes the DC power supply forward and positions it. Then, using the distance difference from the front process groove (27), the spring probe contacts the test point of the DC power supply. Then, the front positioning manipulator (7) drives the measuring probe (9) to contact the test point of the DC power supply through the front measuring head (8). With the help of a DCDC power module test system, it includes a positioning tooling fixture (2) for placing the DCDC power module, an auxiliary tooling fixture (1) arranged on one side of the positioning tooling fixture (2), a loading and unloading manipulator (3) arranged on the auxiliary tooling fixture (1), a loading and unloading suction head (4) arranged at the front end of the loading and unloading manipulator (3) and used for replacing the DCDC power module to be tested, a bottom suction head (5) arranged below the positioning tooling fixture (2) and used for adsorbing or taking out the DCDC power module, a detection device (6) arranged on the auxiliary tooling fixture (1), a front positioning manipulator (7) arranged on the auxiliary tooling fixture (1) and located at the front end of the positioning tooling fixture (2), a front measuring head (8) arranged at the front end of the front positioning manipulator (7), and a measuring probe (9) arranged at the front end of the front measuring head (8) and used for electrical contact with the DCDC power module. The detection device (6) includes a front probe (33) for detecting the power of the DCDC power module and electrically connected to the detection connector terminal, and a spring probe for detecting the voltage signal of the DCDC power module. The spring probe is electrically connected to a multimeter through a wire. The positioning tooling (2) includes a fixedly arranged pistol grip frame (10), a pistol grip front support and a pistol grip rear seat (11) respectively arranged on the pistol grip frame (10), a pistol grip body frame (12) arranged on the pistol grip frame (10) and the pistol grip rear seat (11), a horizontal channel arranged between the pistol grip body frame (12) and the pistol grip front support, a pistol trigger (15) movably arranged in the horizontal channel, a bolt positioning pedestal (13) arranged at the front end of the pistol grip body frame (12) and used for placing the DCDC power module, a process vertical through hole (14) arranged on the bolt positioning pedestal (13) and located below the DCDC power module, a pistol wrench (16) arranged at the rear side of the lower end of the pistol trigger (15) and used for manual or motorized control, a force regulator (17) arranged at the lower end of the bolt positioning pedestal (13) and located directly in front of the pistol trigger (15), adjustment positioning slots (18) distributed on the force regulator (17), a pistol return spring (19) with one end located in the adjustment positioning slot (18) and the other end connected to the front end of the pistol trigger (15), a guide positioning slot (20) arranged on the pistol grip body frame (12) and in which the upper rear part of the pistol trigger (15) longitudinally slides, a bolt body (24) located above the pistol grip body frame (12) and connected to the top of the pistol trigger (15), two symmetric connecting rod arms (21) with roots distributed and hinged on both sides of the rear part of the pistol grip body frame (12), a connecting rod long slot (22) obliquely arranged on the connecting rod arm (21), a driving cross shaft arranged on the bolt body (24) and with the corresponding end located in the connecting rod long slot (22), a bolt guide rear cover (23) arranged at the rear part of the pistol grip body frame (12) and in which the bolt body (24) slides in its lower through slot, mounting process grooves (25) arranged side by side at the front end of the bolt body (24) and used for placing spring probes, an upper movable cover plate (26) with the lower end hinged on the horizontal bent arm of the connecting rod arm (21) and in an L shape, a front process groove (27) vertically distributed on the front end face of the vertical plate of the upper movable cover plate (26), a pushing ejector rod (28) arranged on the lower end face of the upper movable cover plate (26) and corresponding to the corresponding mounting process groove (25) and used for pushing the spring probe forward, a guiding arc angle (29) arranged at the cantilever head of the pushing ejector rod (28) and used for guiding into the mounting process groove (25), and a pulling spring (30) arranged between the pushing ejector rod (28) and the upper movable cover plate (26).

2. The DC power supply performance parameter testing method according to claim 1, wherein : For the step of respectively measuring the insulation parameters of the DC power supply through the probes, first, start the single-chip microcomputer; then, when the single-chip microcomputer detects an external high-voltage input, control the on-off of the relay according to the preset programming sequence to enable the probes of the detection device (6) to test each insulation test point.

3. The DC power supply performance parameter testing method according to claim 1, characterized in that : A workpiece positioning process concave platform (31) for placing a DCDC power module is provided on a bolt positioning pedestal (13). A longitudinal front groove (32) for placing a front probe (33) of a detection device (6) is longitudinally provided at the front end of the workpiece positioning process concave platform (31). A workpiece taking process groove (34) for taking out the front probe (33) is provided below the longitudinal front groove (32); For the step of measuring the power parameters and voltage signals of a DC power supply through probes respectively, a spring probe measures the voltage signal through a multimeter, and a connector terminal measures the power parameters through the front probe (33).

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