CN110764012A - Method for testing performance parameters of direct-current power supply - Google Patents

Abstract

The invention relates to a method for testing the performance parameters of a DC power supply, which includes the following steps: firstly, feeding materials through a manipulator; then, positioning and clamping through a tool; secondly, using probes to measure the insulation parameters, power parameters and voltage signals of the DC power supply respectively. Measurement; 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 feeding step, the loading and unloading manipulator controls the loading and unloading suction head to adsorb/grip the DC power supply to the workpiece positioning process concave table; the present invention has reasonable design, compact structure and convenient use.

Description

Test method for performance parameters of DC power supply

technical field

The invention relates to a method for testing performance parameters of a DC power supply.

Background technique

At present, for the previous system and method for testing the output voltage of the DCDC module power supply with a dedicated connector in the past, it is a simple connection test, and its test accuracy is low, because no matter how small the contact resistance of the connector is, a voltage drop will occur under high current. phenomenon, which is unacceptable for high-precision testing. The significance of the method of the present invention is that the power and voltage signals are divided into two paths, the power part still uses the traditional connector terminals, and a set of spring probes are specially added to test the module output pins. Since the actual current generated by the test voltage of the multimeter is extremely small, and the contact resistance of the spring probe is also extremely small, the voltage drop generated can be ignored, which effectively improves the test accuracy. In the traditional method, since the alligator clip and the pin of the converter are in point contact, it is very easy to cause damage to the converter or "soft breakdown" of the internal circuit due to poor contact of the clip, which greatly increases the probability of human error and product scrapping. As a result, the production cost has increased dramatically. Although CN201520454637.8 a full-type series DC-DC converter special test bench provides a set of solutions, its detection accuracy is still not high enough, and it is still not suitable for high-precision aerospace remote control, inertial navigation system, deep-sea detection and other high-end field.

In addition, the existing testing technology relies heavily on labor, the cost is high, the product is easily damaged due to mismeasurement, and there is a certain danger to the operator. Hand-held electrodes for testing are not only easy to be hit by high voltage, but also more likely to cause internal breakdown of the module due to accidental touch. With automated testing, you only need to put the module on a specific fixture, and then connect to the test instrument. The tester automatically switches the test points, and the efficiency is also improved.

SUMMARY OF THE INVENTION

In general, the technical problem to be solved by the present invention is to provide a DCDC power module testing system and method. No matter how small the contact resistance of traditional connectors is, the phenomenon of voltage drop will occur under high current, which is an unacceptable error for military high-precision testing. The significance of the test of the present invention is that the power and voltage signals are divided into two paths, the power part still uses the traditional connector terminals, and a set of spring probes are specially added to test the output pins of the module. Since the actual current generated by the test voltage of the multimeter is extremely small, and the contact resistance of the spring probe is also extremely small, the voltage drop generated can be ignored, which effectively improves the test accuracy. Thanks to the ergonomic action structure, the clamping efficiency is also improved. The present invention adopts the action mode similar to pulling the trigger, which can effectively improve the test efficiency of the module.

In order to solve the above problems, the technical scheme adopted by the present invention is:

A method for testing the performance parameters of a DC power supply and a DCDC power supply module, comprising the following steps: firstly, feeding materials by a manipulator; then, positioning and clamping by a tool; The voltage signal is measured; 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/grip the DC power supply to the workpiece positioning process concave table;

For the positioning and clamping steps of the tooling, first, pull the gun wrench, the gun trigger will slide longitudinally in the horizontal channel and the guide positioning groove against the tension of the gun return spring, and at the same time, pull the bolt body to retreat along the bolt guide back cover; then , pull the bolt body to move along the long groove of the connecting rod by driving the horizontal shaft, so that the upper movable cover plate swings backward; secondly, place the spring probe into the installation process groove; thirdly, loosen the gun wrench and reset the gun Under the action of the spring restoring force and the gravity of the upper movable cover, the upper movable cover swings forward, and the guiding arc angle enters the rear of the installation process groove, so that the ejector rod is pushed forward against the spring probe; Move forward with the DC power supply and position it; later, the spring probe contacts the test point of the DC power supply by using the distance difference from the groove of the previous process; and then back, the front positioning manipulator drives the measuring probe to contact the test point of the DC power supply through the front measuring head .

For the steps of separately adjusting the insulation parameters of the DC power supply through the probes, firstly, start the single-chip microcomputer; then, when the single-chip microcomputer detects that there is an external high-voltage input, it controls the on-off of the relay according to the preset programming sequence, so as to realize the probe pair of the detection device. Each insulation test point is tested.

For the steps of measuring the power parameters and voltage signals of the DC power supply through the probe, the spring probe is used to measure the voltage signal through a multimeter, and the connector terminal is used to measure the power parameter through the front probe. This equipment is mainly used to test the output voltage of the power supply of the DCDC module. Compared with the previous dedicated connectors, the accuracy of the method of the present invention is significantly improved, because no matter how small the contact resistance of the connector is, the voltage drop phenomenon will occur under high current. For high precision testing is an unacceptable error. The significance of the method of the present invention is that the power and voltage signals are divided into two paths, the power part still uses the traditional connector terminals, and a set of spring probes are specially added to test the module output pins. Since the actual current generated by the test voltage of the multimeter is extremely small, and the contact resistance of the spring probe is also extremely small, the voltage drop generated can be ignored, which effectively improves the test accuracy. The invention has high test precision, more reasonable ergonomic design and high test efficiency.

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

Using automated testing, you only need to put the module on a specific fixture, and then connect to the test instrument. The tester automatically switches the test points, and the efficiency is also improved. This equipment is mainly used to automatically test the electrical insulation performance of the power supply module. Compared with the previous manual test, the safety performance of the automatic test is significantly improved: the test performed by a human hand-held electrode is not only easy to be hit by high voltage electricity, but also more likely to be touched by mistake. Causes internal breakdown of the module. With automated testing, you only need to put the module on a specific fixture, and then connect to the test instrument. The tester automatically switches the test points, and the efficiency is also improved.

The invention has the advantages of reasonable design, low cost, strong durability, safety and reliability, simple operation, saving time and labor, saving money, compact structure and convenient use.

Description of drawings

FIG. 1 is a schematic diagram of the overall structure of the present invention.

FIG. 2 is a schematic structural diagram of a first view point of the present invention.

FIG. 3 is a schematic structural diagram of a second perspective of the present invention.

Figure 4 is a schematic structural diagram of the explosion of the present invention.

FIG. 5 is a schematic structural diagram of the control of the present invention.

Among them: 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 body; 13, gun bolt positioning base; 14, process vertical through hole; 15, gun trigger; 16, gun wrench; 17. Strength adjuster; 18. Adjustment positioning slot; 19. Gun return spring; 20. Guide positioning slot; 21. Link arm; 22. Link long slot; 23. Bolt guide back cover; body; 25, installation process groove; 26, upper movable cover plate; 27, front process groove; 28, push ejector rod; 29, guide arc angle; 30, tension spring; 31, workpiece positioning process concave table; 32, Longitudinal front groove; 33. Front probe; 34. Pick-up process groove.

Detailed ways

As shown in Figure 1-4, the DCDC power module testing system of this embodiment includes a positioning tool 2 for placing the DCDC power module, an auxiliary tool 1 arranged on one side of the positioning tool 2, and an upper and lower tool set on the auxiliary tool 1. Feeding manipulator 3. The loading and unloading suction head set at the front end of the loading and unloading manipulator 3 and used to replace the DCDC power module to be tested 4. The bottom suction head set under the positioning tool 2 and used to absorb or take out the DCDC power module 5. Setting The detection device 6 on the auxiliary tool 1, the front positioning robot 7 arranged on the auxiliary tool 1 and located at the front end of the positioning tool 2, the front measuring head 8 arranged at the front end of the front positioning robot 7, and the front end of the front measuring head 8 and Measuring probe 9 for electrical contact with the DCDC power module.

The positioning tool 2 includes a fixed gun handle frame 10, a gun handle front support and a gun handle rear seat 11 respectively arranged on the gun handle frame 10, and arranged on the gun handle frame 10 and the gun handle rear seat 11. The gun handle sub-frame 12, the horizontal channel arranged between the gun handle sub-frame 12 and the gun handle sub-frame, the gun trigger 15 movably arranged in the horizontal channel, arranged at the front end of the gun handle sub-frame 12 and used The bolt positioning pedestal 13 on which the DCDC power supply module is placed, the process vertical through hole 14 disposed on the bolt positioning pedestal 13 and located under the DCDC power supply module, and the rear side of the lower end of the gun trigger 15 and used for manual or motorized control. The gun wrench 16, the strength adjuster 17 located at the lower end of the bolt positioning base 13 and located directly in front of the gun trigger 15, the adjustment positioning slot 18 distributed on the strength adjuster 17, one end is located in the adjustment positioning slot 18 and the other end A gun return spring 19 connected to the front end of the gun trigger 15, a guide positioning groove 20 provided on the gun handle sub-frame 12 and in which the upper rear side of the gun trigger 15 slides longitudinally, located above the gun handle sub-frame 12 and connected to the gun trigger 15 The bolt body 24 connected at the top, two link arms 21 which are symmetrically arranged and hinged on both sides of the rear of the handle sub-frame 12, the link long groove 22 arranged obliquely on the link arm 21, the link arms 22 arranged on the gun The horizontal drive shaft on the bolt body 24 and the corresponding end is located in the long groove 22 of the connecting rod, the bolt guide rear cover 23 arranged on the rear of the handle sub-frame 12 and the bolt body 24 slides through the groove in the lower part, side by side The installation process slot 25 arranged at the front end of the bolt body 24 and used for placing the spring probe, the lower end hinged on the horizontal curved arm of the link arm 21 and an L-shaped upper movable cover 26, vertically distributed on the upper movable cover 26 The front process groove 27 on the front end surface of the vertical plate, the push rod 28 arranged on the lower end face of the upper movable cover plate 26 and corresponding to the corresponding installation process groove 25 and used to push the spring probe forward, set on the push rod 28 cantilever head and guide arc angle 29 for guiding into the installation process slot 25 , and a pulling spring 30 arranged between the push rod 28 and the upper movable cover plate 26 .

A workpiece positioning process concave table 31 for placing the DCDC power module is provided on the bolt positioning table 13, and a longitudinal front groove 32 for placing the front probe 33 of the detection device 6 is longitudinally provided at the front end of the workpiece positioning process concave table 31, Below the longitudinal front groove 32 is provided a pick-up process groove 34 for taking out the front probe 33 .

The detection device 6 includes probes for measuring the electrical insulation of the DCDC power module, and an insulation test circuit; the insulation test circuit includes a transistor Q1, a voltage regulator D1, a single-chip microcomputer, a number of transistors Q2, and a number of relays;

As a specific method, as shown in Figure 5, the external detection circuit detects that the high-voltage input is grounded through the voltage regulator D1, and through the base of the transistor Q1, the emitter of the transistor Q1 is grounded, and the collector of the transistor Q1 is connected to pin 1 of the microcontroller; pin 40 of the microcontroller is connected to Power supply, pin 20 of the single-chip microcomputer is grounded; the output pin of the single-chip microcomputer is connected to the base of the transistor Q2, the emitter of the transistor Q2 is grounded, and the collector of the transistor Q2 is connected to the relay control coil and the power supply. Test circuit for several test points;

A number of transistors Q2 are switched on and off by the microcontroller to realize the test switching of the corresponding test points.

The test circuit is electrically connected to the measurement point of the DCDC power module through corresponding probes.

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 .

The method for testing the performance parameters of the DC power supply in this embodiment includes the following steps: firstly, feeding materials through a manipulator; then, positioning and clamping through a tool; secondly, using probes to measure the insulation parameters, power parameters, and voltage signals of the DC power supply, respectively Take the measurement; again, after the measurement, 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 absorb/claw the DC power supply to the workpiece positioning process concave table 31;

Carry out the positioning and clamping steps for the tooling. First, pull the gun wrench 16. The gun trigger 15 overcomes the pulling force of the gun return spring 19 and slides longitudinally in the horizontal channel and the guide positioning groove 20. At the same time, the bolt body 24 is pulled along the bolt guide. The cover 23 is retracted; then, the bolt body 24 is driven to move along the long groove 22 of the connecting rod by driving the horizontal axis, so as to realize the backward swing of the upper movable cover plate 26; secondly, the spring probe is placed in the installation process groove 25; Once again, loosen 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 guide arc angle 29 enters the rear of the installation process slot 25, so that the ejector rod is pushed. 28 moves forward against the spring probe; then, the front process groove 27 moves forward and is positioned against the DC power supply; and later, using the distance difference with the front process groove 27, the spring probe contacts the DC power test point; Afterwards, the front positioning manipulator 7 drives the measurement probe 9 through the front measurement head 8 to contact the DC power test point.

For the steps of separately adjusting the insulation parameters of the DC power supply through the probes, first, start the single-chip microcomputer; then, when the single-chip microcomputer detects that there is an external high-voltage input, it controls the relay on and off according to the preset programming sequence, so as to realize the probe of the detection device 6 Test each insulation test point.

For the step of measuring the power parameters and voltage signals of the DC power supply through the probes, the spring probes use a multimeter to measure the voltage signals, and the connector terminals use the front probe 33 to measure the power parameters.

The auxiliary tool 1 realizes the installation of the measuring device, the positioning tool 2 realizes the positioning of the DCDC DC power module, the loading and unloading manipulator 3 realizes automatic loading and unloading, and the loading and unloading suction head 4 realizes the detection. , the bottom adsorption head 5 or the manipulator realizes the non-destructive transportation of 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 , the gun handle sub-frame 12 realizes support, the gun bolt positioning pedestal 13 has a vertical through hole 14 to facilitate the lifting of the lower suction nozzle, the gun trigger 15 realizes the guide linkage drive, the gun wrench 16 realizes the drive input, and the strength adjuster 17 realizes according to the workpiece conditions. Adjust the speed, adjust the positioning slot 1 to realize the length adjustment of the gun return spring 19, realize the strength adjustment, the guide positioning slot 20 realizes the guidance, the link arm 21, the connecting rod long slot 22 realizes the linkage, and the bolt guides the back cover 23 realizes the guidance , the bolt body 24 realizes linkage, the installation process groove 25 realizes the guide drive, the upper movable cover plate 26 realizes the guidance of the spring probe by pressing down, and at the same time, the swing swing is realized by swinging, and the downward swing is realized by the self-weight and the spring force. The groove 27 can push and locate the power supply sideways, and a buffer pad can be added to reduce the impact loss of the power supply, and the push rod 28 can be pushed to realize the subsequent push of the probe. The guide arc angle 29 is easy to push the push rod into the groove. Swing under gravity, the workpiece positioning process concave table 31 is convenient for positioning, the longitudinal front groove 32 is convenient for the front probe 33 to guide, and the pick-up process groove 34 is convenient for manual or mechanical removal.

The present invention is fully described for the purpose of clearer disclosure, and the prior art will not be exemplified one by one.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; 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 it can still be Modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; it is obvious for those skilled in the art to combine multiple technical solutions of the present invention. However, these modifications or substitutions 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 (5)

1. a DC power supply performance parameter testing method, is characterized in that: comprise the following steps, at first, feed material by manipulator; Then, carry out positioning and clamping by tooling; Secondly, respectively, by probe, insulation parameter, power parameter of DC power supply are , and the voltage signal for measurement; again, after the measurement is completed, the DC power supply is taken out by the manipulator. 2. The method for testing DC power supply performance parameters according to claim 1, characterized in that: for the feeding step, the loading and unloading manipulator (3) controls the loading and unloading suction head (4) to adsorb/grip the DC power supply to the workpiece positioning. on the craft concave table (31); For the positioning and clamping steps of the tooling, first, pull the gun wrench (16), the gun trigger (15) overcomes the pulling force of the gun return spring (19) and slides longitudinally in the horizontal channel and the guide positioning groove (20), at the same time, pulls the gun bolt The body (24) retreats along the bolt guide back cover (23); then, the bolt body (24) is driven to move along the connecting rod long groove (22) by driving the transverse shaft, thereby realizing the upper movable cover (26) Swing backwards; secondly, place the spring probe into the installation process slot (25); thirdly, loosen 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 (26) , the upper movable cover plate (26) swings forward, and the guide arc angle (29) enters the rear of the installation process groove (25), so that the push rod (28) is pushed forward against the spring probe; then, the front process groove (27) Move forward against the DC power supply and position it; later, using the distance difference from the front process groove (27), the spring probe contacts the DC power supply test point; and then back, the front positioning manipulator (7) passes the front measurement The head (8) drives the measuring probe (9) to contact the DC power test point. 3. DC power supply performance parameter testing method according to claim 1, is characterized in that: for the step of respectively to the insulation parameter of DC power supply by probe, at first, start single chip computer; At the same time, according to the preset programming sequence, the relay is controlled to be on and off, so that the probe of the detection device (6) can test each insulation test point. 4. DC power supply performance parameter testing method according to claim 1, is characterized in that: For the power parameter and the voltage signal of DC power supply are respectively measured step by probe, spring probe carries out voltage signal measurement by multimeter, connector The terminals conduct power parameter measurements through the front probe (33). 5. DC power supply performance parameter testing method according to claim 1, is characterized in that: by means of DCDC power supply module testing system, it comprises the positioning tooling (2) for placing DCDC power supply module, is arranged on positioning tooling (2) Auxiliary tooling (1) on one side, a loading and unloading manipulator (3) set on the auxiliary tooling (1), a loading and unloading suction head (4) set at the front end of the loading and unloading manipulator (3) and used to replace the DCDC power module to be tested ), a bottom suction head (5) arranged under 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), and a detection device (6) arranged on the auxiliary tooling (1) A front positioning manipulator (7) located on the front end of the positioning tool (2), a front measuring head (8) arranged at the front end of the front positioning manipulator (7), and a front measuring head (8) arranged at the front end and used for connecting with the DCDC power supply. Measuring probe (9) for the electrical contact of the module.

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