Pulse power supply with photographing function and pulse current test system

Abstract

The utility model discloses a pulse power supply and pulse current test system with a photographing function. The pulse power supply and pulse current test system comprises a capacitor bank, a charging unit, an IGBT module, a sample connecting end, a main control module and a high-speed photographing camera. According to the embodiment of the utility model, the capacitor bank is charged through the charging unit, the main control module outputs the pulse voltage to act on the metal sample by controlling the IGBT module so as to generate large pulse current, and the high-speed camera is triggered to photograph the surface of the metal sample while the pulse is output; and recording the change of the metal sample before and after the pulse current action. According to the utility model, the pulse current and the high-speed camera can be synchronized, the high-speed camera is triggered to photograph the surface of the metal sample while the pulse current is applied to the metal sample, the change of the metal sample is accurately obtained, and the test reliability is improved.

Description

Technical Field

[0001] The utility model relates to the field of pulse power supplies, in particular to a pulse power supply with a camera function and a pulse current testing system. Background Art

[0002] In some studies, it is necessary to perform pulse current testing on metals. There are some defects in the metal, such as dislocations, twin boundaries and grain boundaries. Applying pulse current to the metal sample can cause these defects to move. Based on the test results, a new process reference can be provided for the processing of the metal sample.

[0003] The existing metal pulse current test process is to use an independent pulse power supply to energize the metal sample on the one hand, and take pictures of the metal sample surface by a manual handheld camera on the other hand, and then analyze the pictures. However, the disadvantage of this test method is that the camera's photography and the pulse current cannot be synchronized, and the changes of the metal sample cannot be accurately observed, and the test reliability is low. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a pulse power supply and a pulse current test system with a camera function, which can synchronize the pulse current and the high-speed camera, and trigger the high-speed camera to take pictures of the surface of the metal sample while applying the pulse current to the metal sample, so as to accurately obtain the changes of the metal sample and improve the reliability of the test.

[0005] The pulse power supply with a photographing function according to the embodiment of the first aspect of the utility model includes: a capacitor group; a charging unit, the output end of the charging unit is connected to the capacitor group for charging the capacitor group; an IGBT module, the capacitor group is connected to the input end of the IGBT module; a sample connection end, the sample connection end is used to connect a metal sample to be tested, and the output end of the IGBT module is connected to the sample connection end; a main control module, the first output end of the main control module is connected to the control end of the charging unit for controlling the charging of the capacitor group, and the second output end of the main control module is connected to the control end of the IGBT module for controlling the IGBT module to output a pulse current; a high-speed camera, the third output end of the main control module is connected to the control end of the high-speed camera for triggering the high-speed camera to take pictures of the surface of the metal sample to be tested while the pulse is output.

[0006] The pulse power supply with a camera function according to the first aspect of the present utility model has at least the following beneficial effects:

[0007] The embodiment of the utility model charges the capacitor group through the charging unit, and the main control module controls the IGBT module to output a pulse voltage to act on the metal sample to generate a large pulse current, and triggers a high-speed camera to take pictures of the surface of the metal sample while the pulse is output, and records the changes of the metal sample before and after the pulse current acts. The utility model can synchronize the pulse current and the high-speed camera, and trigger the high-speed camera to take pictures of the surface of the metal sample while applying a pulse current to the metal sample, accurately obtain the changes of the metal sample, and improve the reliability of the test.

[0008] According to some embodiments of the present utility model, the charging unit includes a switching power supply and a DC-DC boost module, the input end of the switching power supply is used to input AC power, the output end of the switching power supply is connected to the input end of the DC-DC boost module, the output end of the DC-DC boost module is connected to the capacitor group, and the first output end of the main control module is connected to the control end of the DC-DC boost module.

[0009] According to some embodiments of the present invention, the switching power supply is a 48V switching power supply.

[0010] According to some embodiments of the present invention, the model of the main control module is TMS320F28035PAG.

[0011] According to some embodiments of the present invention, the capacitor group uses six 500V capacitors connected in parallel.

[0012] According to some embodiments of the present utility model, the main control module is connected to the control end of the high-speed camera via an optical coupling relay.

[0013] According to the pulse current testing system of the second aspect of the utility model, the pulse current testing system comprises an oscilloscope, a host computer and the above-mentioned pulse power supply with camera function, wherein the oscilloscope is used to read the pulse current output by the IGBT module, and the host computer is communicatively connected with the main control module.

[0014] The pulse current testing system according to the second aspect of the present invention has at least the following beneficial effects:

[0015] The embodiment of the utility model charges the capacitor group through the charging unit, and the main control module controls the IGBT module to output a pulse voltage to act on the metal sample to generate a large pulse current, and triggers a high-speed camera to take pictures of the surface of the metal sample while the pulse is output, and records the changes of the metal sample before and after the pulse current acts. The utility model can synchronize the pulse current and the high-speed camera, and trigger the high-speed camera to take pictures of the surface of the metal sample while applying a pulse current to the metal sample, accurately obtain the changes of the metal sample, and improve the reliability of the test.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0018] Figure 1 This is a principle block diagram of a pulse power supply with a camera function in an embodiment of the utility model;

[0019] Figure 2 The circuit schematic diagram of the DC-DC boost module in the embodiment of the utility model;

[0020] Figure 3 This is a circuit connection diagram between the main control module and the high-speed camera in the embodiment of the utility model;

[0021] Figure 4 2 is a circuit diagram of a capacitor bank in an embodiment of the present utility model. DETAILED DESCRIPTION

[0022] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0023] In the description of the present invention, it should be understood that the descriptions involving orientation, such as the orientation or positional relationship indicated as up, down, etc., are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0024] In the description of the present utility model, "a plurality" means more than two. If there is a description of "first" or "second", it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0025] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0026] Reference Figure 1As shown, a pulse power supply with a camera function includes: a capacitor group, a charging unit, an IGBT module, a sample connection terminal, a main control module and a high-speed camera. Specifically, in the embodiment of the utility model, the charging unit includes a switching power supply and a DC-DC boost module. The input end of the switching power supply is connected to a 220V mains power supply. In the utility model, the switching power supply adopts a 48V switching power supply to convert the 220V AC mains power supply into a 48V DC power supply. The output end of the switching power supply is connected to the input end of the DC-DC boost module. The output end of the DC-DC boost module is connected to the capacitor group. Figure 2 As shown, in the embodiment of the utility model, the DC-DC boost module converts 48V direct current into 50-450V direct current to charge the capacitor group, and the first output end of the main control module is connected to the control end of the DC-DC boost module to achieve control of the boost. The capacitor group is connected to the input end of the IGBT module, the sample connection end is a terminal connected to the metal sample to be tested, the output end of the IGBT module is connected to the sample connection end, and the pulse current output by the IGBT module flows through the metal sample; the second output end of the main control module is connected to the control end of the IGBT module to control the IGBT module to output the pulse current; the third output end of the main control module is connected to the control end of the high-speed camera to trigger the high-speed camera to take pictures of the surface of the metal sample to be tested while the pulse is output.

[0027] Specifically, refer to Figure 4 As shown, the capacitor bank in the utility model uses six 70uf-500V capacitors connected in parallel, and the first output end of the main control module is connected to the control end of the DC-DC boost module. Among them, the model of the main control module in the utility model is TMS320F28035PAG. Figure 2 As shown, the Pwm_Buck pin, PWM_FW_1 pin and PWM_FW_2 pin of the main control module are respectively connected to the three gate controllers U1, gate controller U2 and gate controller U3 of the DC-DC boost module. The main control module sends PWM signals through three pins to realize the boost control of the DC-DC boost module. In addition, the boost module also provides 5V DC power supply to the main control module.

[0028] Specifically, refer to Figure 3 As shown, the main control module is connected to the control end of the high-speed camera through the optocoupler relay IC1, the CAM_TRIG pin of the main control module is connected to the gate of the MOS tube Q7, the drain of the MOS tube Q7 is connected to the pin 2 of the optocoupler relay IC1, the pin 1 of the optocoupler relay IC1 is connected to the VCC_5V power supply end, and the pin 15 of the optocoupler relay IC1 is connected to the interface J9, which is the interface of the high-speed camera. The main control module controls the high-speed camera to take pictures through the CAM_TRIG pin to achieve the synchronization of the pulse current and the high-speed camera.

[0029] The embodiment of the utility model charges the capacitor group through the charging unit, and the main control module controls the IGBT module to output a pulse voltage to act on the metal sample to generate a large pulse current, and triggers a high-speed camera to take pictures of the surface of the metal sample while the pulse is output, and records the changes of the metal sample before and after the pulse current acts. The utility model can synchronize the pulse current and the high-speed camera, and trigger the high-speed camera to take pictures of the surface of the metal sample while applying a pulse current to the metal sample, accurately obtain the changes of the metal sample, and improve the reliability of the test.

[0030] refer to Figure 1 As shown, the utility model also relates to a pulse current testing system, including an oscilloscope, a host computer and a pulse power supply with a camera function of the above embodiment, the oscilloscope is used to read the pulse current output by the IGBT module, and the host computer is communicatively connected with the main control module.

[0031] It should be noted that after the user sets the working voltage, pulse time, working cycle and other parameters through the software of the host computer and sends them to the main control module, the main control module controls the DC-DC boost module to charge the capacitor group to the set voltage, and then the main control module controls the IGBT module to output the pulse voltage to act on the metal sample to be tested, thereby generating a large pulse current, and at the same time as the pulse output, triggers a high-speed camera to take pictures of the surface of the metal sample, records the changes before and after the pulse current acts, and the generated pulse current is read out through the current probe of the oscilloscope to provide the user with analysis.

[0032] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A pulse power supply with a camera function, characterized in that: include: Capacitor bank; A charging unit, wherein an output end of the charging unit is connected to the capacitor bank for charging the capacitor bank; IGBT module, the capacitor group is connected to the input end of the IGBT module; A sample connection end, the sample connection end is used to connect a metal sample to be tested, and the output end of the IGBT module is connected to the sample connection end; A main control module, wherein a first output end of the main control module is connected to a control end of the charging unit to control the charging of the capacitor bank, and a second output end of the main control module is connected to a control end of the IGBT module to control the IGBT module to output a pulse current; A high-speed camera, wherein the third output terminal of the main control module is connected to the control terminal of the high-speed camera so as to trigger the high-speed camera to take pictures of the surface of the metal sample to be tested while the pulse is output.

2. The pulse power supply with camera function according to claim 1, characterized in that: The charging unit includes a switching power supply and a DC-DC boost module, the input end of the switching power supply is used to input AC power, the output end of the switching power supply is connected to the input end of the DC-DC boost module, the output end of the DC-DC boost module is connected to the capacitor group, and the first output end of the main control module is connected to the control end of the DC-DC boost module.

3. The pulse power supply with camera function according to claim 2, characterized in that: The switching power supply is a 48V switching power supply.

4. The pulse power supply with camera function according to claim 1, characterized in that: The model of the main control module is TMS320F28035PAG.

5. The pulse power supply with camera function according to claim 1, characterized in that: The capacitor group uses six 500V capacitors connected in parallel.

6. The pulse power supply with camera function according to claim 1, characterized in that: The main control module is connected to the control end of the high-speed camera via an optical coupler relay.

7. A pulse current testing system, characterized in that: It comprises an oscilloscope, a host computer and a pulse power supply with a camera function as claimed in any one of claims 1 to 6, wherein the oscilloscope is used to read the pulse current output by the IGBT module, and the host computer is communicatively connected with the main control module.

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