Direct-current power supply automatic parallel calibration system and method thereof

Abstract

The invention discloses a direct-current power supply automatic parallel calibration system and method, the direct-current power supply automatic parallel calibration system comprises a test area, a metering standard device, a junction box and a control system, a direct-current power supply to be calibrated is placed in the test area, a mechanical switch is arranged in the junction box, and the control system is connected with the junction box. According to the invention, the control system controls the mechanical switch in the junction box to adjust the connection mode between the direct current power supply to be calibrated and the metering standard equipment, that is, when different metering standard equipment needs to be used, manual repeated wire connection and replacement are not needed, and when a large batch of metering tasks are encountered, the metering efficiency can be improved, and the metering timeliness requirement can be ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of automatic calibration of direct current power supplies, and in particular to a direct current power supply automatic parallel calibration system and method thereof. Background Art

[0002] DC power supply is an important component of most equipment and electronic instruments. The effectiveness of its measurement characteristics such as normal power supply, accurate measurement value, and load capacity will directly affect the normal operation and performance of various electrical equipment such as control systems and electronic instruments.

[0003] In order to ensure the accuracy and reliability of the DC power supply value, it is necessary to trace the DC voltage indication error, DC current indication error, power supply voltage regulation rate, load regulation rate, output voltage short-term stability and ripple voltage, mainly using standard equipment such as DC voltmeter, DC ammeter, AC voltmeter and DC load. However, different projects require different metering equipment, and the line needs to be repeatedly connected when the project is switched. Currently, only single-channel measurement is supported, and repeated wiring is also required when the channel is switched, which causes a great waste of manpower and material resources and greatly affects the measurement efficiency. Especially when encountering large-scale measurement tasks, it is difficult to ensure the timeliness of measurement. Summary of the invention

[0004] The purpose of the present invention is to design a DC power supply automatic parallel calibration system in order to solve the above problems.

[0005] The present invention achieves the above-mentioned purpose through the following technical solutions: Automated parallel calibration system for DC power supplies, including: A test area for placing the DC power supply to be calibrated; A metrological standard device, used for performing metrological calibration on the DC power supply to be calibrated; A junction box, wherein a mechanical switch is provided inside the junction box, and the junction box is used to connect the DC power supply to be calibrated with the measurement standard device; A control system is connected to the junction box, and the control system is used to control the action of the mechanical switch in the junction box and adjust the connection mode between the DC power supply to be calibrated and the measurement standard equipment.

[0006] The present invention also provides a DC power supply automatic parallel calibration method, which is applied to the DC power supply automatic parallel calibration system as described above. The DC power supply automatic parallel calibration method comprises the following steps: Start the calibration system and perform system self-check; Identify device information of the DC power supply to be calibrated; Connecting the DC power supply to be calibrated with a measurement standard device according to the device information of the DC power supply to be calibrated, and calibrating the DC power supply to be calibrated; Place the calibrated DC power supply in the calibrated area; Close the calibration system.

[0007] The beneficial effects of the present invention are: The DC power supply automated parallel calibration system uses a mechanical switch installed in the junction box. The control system can adjust the connection method between the DC power supply to be calibrated and the measurement standard equipment by controlling the mechanical switch. That is, when different measurement standard equipment needs to be used, there is no need to manually connect and switch lines repeatedly. The DC power supply automated parallel calibration system starts and performs a system self-check. The transport vehicle moves the DC power supply to be calibrated to the scanning table. After the scan is completed, the DC power supply to be calibrated is placed in the test area using a test robot arm. The control system controls the connection and calibration and automatically saves the test records to realize the full process automated calibration of the DC power supply. The number of measurement and calibration equipment can be expanded to reduce labor costs and improve measurement efficiency to ensure the measurement timeliness requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a structural schematic diagram of the automatic parallel calibration system of a DC power supply of the present invention; Figure 2 A schematic diagram of a flow chart of an embodiment of a method for automatic parallel calibration of a DC power supply according to the present invention; Figure 3 A schematic diagram of a flow chart of another embodiment of the method for automatic parallel calibration of a DC power supply of the present invention; Figure 4 A schematic diagram of a flow chart of another embodiment of the method for automatic parallel calibration of a DC power supply of the present invention; Figure 5 A schematic diagram of a flow chart of another embodiment of the method for automatic parallel calibration of a DC power supply of the present invention; In the figure: 1-transporter, 2-scanning table, 3-DC power supply in scanning area, 4-first high-definition camera, 5-first slide rail, 6-DC power supply placement table, 7-mechanical cantilever, 8-second slide rail, 9-slide rail power plug, 10-slide rail communication plug, 11-test platform, 12-calibrated DC power supply, 13-slide rail output plug, 14-control system, 15-junction box, 16-slide rail clicker, 17-digital multimeter, 18-second high-definition camera, 19-active load, 20-emergency stop button, 21-standard resistor. DETAILED DESCRIPTION

[0009] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0010] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0011] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0012] In the description of the present invention, it should be understood that the terms "upper", "lower", "inside", "outside", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are directions or positional relationships in which the product of the invention is usually placed when in use, or are directions or positional relationships commonly understood by those skilled in the art. These directions or positional relationships are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0013] Furthermore, the terms “first”, “second”, etc. are merely used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0014] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms such as "setting" and "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0015] The specific implementation modes of the present invention are described in detail below in conjunction with the accompanying drawings.

[0016] like Figure 1-5 As shown, the DC power supply automatic parallel calibration system includes: A test area for placing the DC power supply to be calibrated; A metrological standard device, used for performing metrological calibration on the DC power supply to be calibrated; A junction box 15, wherein a mechanical switch is provided inside the junction box 15, and the junction box 15 is used to connect the DC power supply to be calibrated with the measurement standard device; The control system 14 is connected to the junction box 15, and the control system 14 is used to control the action of the mechanical switch in the junction box 15 and adjust the connection mode between the DC power supply to be calibrated and the measurement standard equipment.

[0017] In this embodiment, the DC power supply automatic parallel calibration system uses a control system 14 to control the mechanical switch action to adjust the connection method between the DC power supply to be calibrated and the measurement standard equipment, thereby realizing automatic calibration of the DC power supply. That is, when different measurement standard equipment needs to be used, there is no need to manually connect and switch lines repeatedly, especially when encountering large-scale measurement tasks, which can improve the measurement efficiency and ensure the measurement timeliness requirements.

[0018] In one embodiment, the DC power supply automated parallel calibration system comprises: The transport vehicle 1 is provided with a movable mechanical cantilever 7, and the mechanical cantilever 7 is provided with a mechanical fixture adapted to the DC power supply to be calibrated; A scanning platform 2, wherein the scanning platform 2 is provided with a scanning probe, and the scanning probe is used to scan the information of the DC power supply to be calibrated placed on the scanning platform 2 and output a corresponding scanning signal; The control system 14 is used to control the transport vehicle 1 to move the DC power supply to be calibrated to the scanning table 2, and identify the device information of the DC power supply to be calibrated according to the scanning signal; control the test robot arm to move the DC power supply to be calibrated to the test area, and control the mechanical switch action according to the device information of the DC power supply to be calibrated.

[0019] Furthermore, the measurement standard equipment includes a digital multimeter 17, a standard resistor 21 and an active load 19, and the control system 14 is respectively connected to the digital multimeter 17, the standard resistor 21 and the active load 19. In this embodiment, the digital multimeter 17 and the active load 19 can be measured by the control system 14, and the active load 19 can be adjusted by the control system 14 and can be completely disconnected.

[0020] Further, the test area is a square groove; The control system 14 is used to adjust the size of the groove according to the scanning signal.

[0021] In this embodiment, the transport vehicle 1 has a top antenna, through which the transport vehicle 1 can receive control signals sent by the control system 14; its mechanical cantilever 7 can move up and down, left and right, and rotate 360°, and a programmable mechanical fixture that can adapt to DC power supplies of different models and sizes is installed on the mechanical cantilever 7. Among them, the test area and the control system 14 are arranged on the upper surface of the test platform 11, the junction box 15 and the metrological standard equipment are arranged inside the test platform 11, and a reference ruler is engraved on the left side of the test platform 11; the scanning platform 2 is located on the left side of the test platform 11, and scanning probes are installed at the bottom, upper front and upper left of the scanning platform 2, and the scanning platform 2 can place at least four DC power supplies to be calibrated.

[0022] It can be understood that the mechanical clamp of the transport vehicle 1 clamps a DC power supply placed flat on the top layer of the waiting area and lifts it by 10 cm. The control system 14 controls the transport vehicle 1 to move according to the preset route. The transport vehicle 1 moves to the left side of the test bench and places the DC power supply to be calibrated on the scanning table 2 until there is no vacant space in the scanning area. The control system 14 controls the transport vehicle 1 to suspend work. Once a DC power supply 3 in the scanning area is taken away from the scanning area, the control system 14 immediately controls the transport vehicle 1 to move a power supply to be calibrated from the waiting area to the scanning area. The control system 14 controls the scanning probe to scan the information of the DC power supply to be calibrated, and obtains the interface information, equipment model, factory number information, structure information and size information of the DC power supply to be calibrated. After the scan, the control system 14 adjusts the size of the test area according to the size information of the DC power supply to be calibrated. The test robot arm places the DC power supply to be calibrated in the test area, and controls the mechanical switch action according to the equipment information of the DC power supply to be calibrated to perform metrological calibration.

[0023] In one embodiment, the DC power supply automated parallel calibration system further comprises a programmable slide rail, and the programmable slide rail is connected to the control system 14; The control system 14 is used to control the program-controlled slide rail to regulate the DC power supply to be calibrated when the DC power supply to be calibrated is a non-program-controlled DC power supply.

[0024] Furthermore, the programmable slide includes a slide power plug 9, a slide communication plug 10, a slide output plug 13 and a slide clicker 16, and the control system 14 is connected to the slide power plug 9, the slide communication plug 10, the slide output plug 13 and the slide clicker 16 respectively.

[0025] In this embodiment, when the DC power supply to be calibrated is a program-controlled DC power supply, the control system 14 directly regulates the DC power supply to be calibrated; when the DC power supply to be calibrated is a non-program-controlled DC power supply, the control system 14 regulates the DC power supply to be calibrated by controlling the program-controlled slide rail. Among them, all plugs in the program-controlled slide rail can move left and right, up and down, and the voltage of the slide rail power plug 9 is accurately controlled by the control system 14 at 198V, 220V and 242V voltage points, and the spacing of the slide rail output plugs 13 can be adjusted by the control system 14.

[0026] The present invention also provides a direct current power supply automatic parallel calibration method, which is applied to the direct current power supply automatic parallel calibration system as described above. The direct current power supply automatic parallel calibration method comprises the following steps: Start the calibration system and perform system self-check; Obtain device information of the DC power supply to be calibrated; Connecting the DC power supply to be calibrated with a measurement standard device according to the device information of the DC power supply to be calibrated, and calibrating the DC power supply to be calibrated; Place the calibrated DC power supply in the calibrated area; Close the calibration system.

[0027] In this embodiment, the calibration system is turned on and various functions of the calibration system are verified, such as whether the control system 14 can accurately control the movement of the first slide rail 5, the second slide rail 8, and the junction box 15, whether the digital multimeter 17 can automatically control and measure, whether the active load 19 can control on and off and adjust the size, whether the emergency stop button 20 operates normally, whether the transport vehicle 1 moves according to the preset route, whether the rotation function is normal, whether the scanning table 2 can scan, whether the images taken by the first high-definition camera 4 and the second high-definition camera 18 are clear and recognizable, whether the DC power supply placement table 6 can be automatically tightened and unfolded, whether the wireless communication control between the control system 14 and the transport vehicle 1 is normal, whether the ambient temperature and humidity meet the calibration requirements, etc. If all equipment in the calibration system can operate and work normally, the system self-check ends.

[0028] After the system self-check is completed, the control system 14 obtains the device information of the DC power supply to be calibrated, and connects the DC power supply to be calibrated with the measurement standard equipment according to the device information of the DC power supply to be calibrated, so as to calibrate the DC power supply to be calibrated. The calibration items of the DC power supply to be calibrated include: power supply voltage regulation rate calibration, the control system 14 controls the slide rail power plug 9 to output 220V voltage, connects the active load 19, and adjusts the size of the active load 19 to maximize the output current of the DC power supply. The control system 14 uses the digital multimeter 17 to read the voltage across the active load 19 as U0, and adjusts the output voltage of the slide rail power plug 9 to 242V and 198V respectively. When the size of the active load 19 is adjusted so that the output current of the DC power supply is consistent with the maximum output current under the condition of 220V, the control system 14 uses the digital multimeter 17 to read the voltages at both ends of the active load 19 as U1 and U2 respectively, and the DC power supply voltage adjustment rate is (U1-U2) / U0×100%; load adjustment rate, the control system 14 controls the output voltage of the slide rail power plug 9 to 220V, controls the DC power supply to output the maximum rated value, adjusts the size of the active load 19 so that the output current of the DC power supply reaches the rated value, and the control system 14 uses the digital multimeter 17 to read the voltage at both ends of the active load 19 as Um, disconnects the active load 19, and reads the no-load When the voltage across the active load 19 is Un, the load adjustment rate of the DC power supply is the absolute value of (Um-Un) / Un×100%; for the short-term stability of the output voltage, the control system 14 controls the output voltage of the slide rail power plug 9 to 220V, controls the maximum rated value of the DC power supply output, adjusts the size of the active load 19 so that the output current of the DC power supply reaches the rated value, and the control system 14 uses the digital multimeter 17 to read the voltage across the active load 19 as Ua. Within the time interval specified in the manual of the tested DC power supply, the maximum change DU of the digital voltmeter is read, and the short-term stability of the output voltage is DU / Ua×100%; ripple voltage, control The system 14 controls the output voltage of the slide rail power plug 9 to be 220V, controls the maximum rated value of the DC power supply output, adjusts the size of the active load 19 so that the output current of the DC power supply reaches the rated value, and the control system 14 uses an oscilloscope and an AC digital multimeter 17 to read the peak-to-peak value of the ripple voltage of the voltage across the active load 19 and the effective value of the ripple voltage; the voltage meter current indicates the value error, the control system 14 controls the disconnection of the active load 19, calibrates its output voltage under no-load conditions, and then connects the active load 19, adjusts the size of the active load 19, and calibrates the DC current. The DC current measurement is indirectly measured by testing the voltage on the standard resistor 21. During the calibration process, the control system 14 saves the data to be used and the corresponding photos.

[0029] After the DC power supply calibration is completed, the control system 14 controls the pull-out of the slide rail power plug 9, the slide rail communication plug 10, and the slide rail output plug 13, and the test robot arm transmits the calibrated DC power supply 12 to the mechanical cantilever 7 of the transport vehicle 1, and the transport vehicle 1 stores the calibrated DC power supply 12 in the calibrated area according to the preset route; after all the DC power supplies to be calibrated are calibrated, the control system 14 controls the transport vehicle 1, the programmable slide rail and the test robot arm to return to the initial position and initial state, turns off the control system 14, and finally turns off all power supplies.

[0030] In one embodiment, the specific steps of obtaining the device information of the DC power supply to be calibrated are: Controlling the transport vehicle 1 to move the DC power supply to be calibrated to the scanning platform 2; Acquire a scanning signal outputted by the scanning probe after scanning the information of the DC power supply to be calibrated placed on the scanning platform 2; The device information of the DC power supply to be calibrated is identified according to the scanning signal.

[0031] In this embodiment, the control system 14 controls the mechanical clamp of the transport vehicle 1 to clamp a DC power supply placed flat on the top layer of the calibrated area and lift it 10 cm. The control system 14 controls the transport vehicle 1 to move along a preset route. The transport vehicle 1 moves to the left side of the test bench and places the DC power supply to be calibrated on the scanning table 2. The control system 14 controls the scanning probe to scan the information of the DC power supply to be calibrated to obtain the interface information, equipment model, factory number information, structure information and size information of the DC power supply to be calibrated.

[0032] In one embodiment, the specific steps of connecting the DC power supply to be calibrated with a measurement standard device according to the device information of the DC power supply to be calibrated are: Controlling the test robot arm to move the DC power supply to be calibrated to the test area; The mechanical switch action is controlled according to the device information of the DC power supply to be calibrated, and the connection mode between the DC power supply to be calibrated and the measurement standard device is adjusted.

[0033] In this embodiment, the control system 14 controls the test robot arm to move the DC power supply to be calibrated to the test area, and controls the mechanical switch action according to the device information of the DC power supply to be calibrated, and adjusts the connection method between the DC power supply to be calibrated and the measurement standard equipment, thereby realizing automatic connection between the DC power supply to be calibrated and the measurement standard equipment to improve the measurement efficiency.

[0034] In one embodiment, the specific steps of controlling the test robot arm to move the DC power supply to be calibrated to the test area are: Adjusting the size of the groove in the test area according to the device information of the DC power supply to be calibrated; The test mechanical arm is controlled to place the DC power supply to be calibrated in the groove and clamp it.

[0035] In this embodiment, the control system 14 adjusts the size of the groove according to the size information of the DC power supply to be calibrated, and the test robot arm places the DC power supply to be calibrated in the groove and clamps it.

[0036] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A DC power supply automated parallel calibration system, It is characterized in that The DC power supply automatic parallel calibration system comprises: A test area for placing the DC power supply to be calibrated; A metrological standard device, used for performing metrological calibration on the DC power supply to be calibrated; A junction box, wherein a mechanical switch is provided inside the junction box, and the junction box is used to connect the DC power supply to be calibrated with the measurement standard device; A control system is connected to the junction box, and the control system is used to control the action of the mechanical switch in the junction box and adjust the connection mode between the DC power supply to be calibrated and the measurement standard equipment.

2. The DC power supply automatic parallel calibration system according to claim 1, It is characterized in that The DC power supply automatic parallel calibration system comprises: A transport vehicle is provided with a movable mechanical cantilever, and the mechanical cantilever is provided with a mechanical fixture adapted to the DC power supply to be calibrated; A scanning platform, wherein the scanning platform is provided with a scanning probe, and the scanning probe is used to perform information scanning on the DC power supply to be calibrated placed on the scanning platform and output a corresponding scanning signal; The control system is used to control the transport vehicle to move the DC power supply to be calibrated to the scanning table, and identify the device information of the DC power supply to be calibrated according to the scanning signal; control the test robot arm to move the DC power supply to be calibrated to the test area, and control the action of the mechanical switch according to the device information of the DC power supply to be calibrated.

3. The DC power supply automatic parallel calibration system according to claim 2, It is characterized in that The measurement standard equipment comprises a digital multimeter, a standard resistor and an active load, and the control system is connected to the digital multimeter, the standard resistor and the active load respectively.

4. The DC power supply automatic parallel calibration system according to claim 2, It is characterized in that The test area is a square groove; The control system is used to adjust the size of the groove according to the scanning signal.

5. The DC power supply automated parallel calibration system according to claim 1, It is characterized in that The DC power supply automated parallel calibration system further comprises a program-controlled slide rail, and the program-controlled slide rail is connected to the control system; The control system is used to control the program-controlled slide rail to regulate the DC power supply to be calibrated when the DC power supply to be calibrated is a non-program-controlled DC power supply.

6. The DC power supply automatic parallel calibration system according to claim 5, It is characterized in that The program-controlled slide rail comprises a slide rail power plug, a slide rail communication plug, a slide rail output plug and a slide rail clicker, and the control system is connected to the slide rail power plug, the slide rail communication plug, the slide rail output plug and the slide rail clicker respectively.

7. A method for automatic parallel calibration of a DC power supply, applied to the automatic parallel calibration system of a DC power supply as claimed in any one of claims 1 to 5, It is characterized in that The DC power supply automatic parallel calibration method comprises the following steps: Start the calibration system and perform system self-check; Obtain device information of the DC power supply to be calibrated; Connecting the DC power supply to be calibrated with a measurement standard device according to the device information of the DC power supply to be calibrated, and calibrating the DC power supply to be calibrated; Place the calibrated DC power supply in the calibrated area; Close the calibration system.

8. The method for automatic parallel calibration of a DC power supply according to claim 7, It is characterized in that The specific steps of obtaining the device information of the DC power supply to be calibrated are: Controlling the transport vehicle to move the DC power supply to be calibrated to the scanning platform; Acquiring a scanning signal output by the scanning probe after scanning the information of the DC power supply to be calibrated placed on the scanning platform; The device information of the DC power supply to be calibrated is identified according to the scanning signal.

9. The method for automatic parallel calibration of a DC power supply according to claim 7, It is characterized in that The specific steps of connecting the DC power supply to be calibrated with the measurement standard equipment according to the equipment information of the DC power supply to be calibrated are: Controlling the test robot arm to move the DC power supply to be calibrated to the test area; The mechanical switch action is controlled according to the device information of the DC power supply to be calibrated, and the connection mode between the DC power supply to be calibrated and the measurement standard device is adjusted.

10. The method for automatic parallel calibration of a DC power supply according to claim 9, It is characterized in that The specific steps of controlling the test robot to move the DC power supply to be calibrated to the test area are: Adjusting the size of the groove in the test area according to the device information of the DC power supply to be calibrated; The test mechanical arm is controlled to place the DC power supply to be calibrated in the groove and clamp it.

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