System and method for acquiring and processing test data of low-voltage apparatus

Abstract

The invention relates to a low-voltage apparatus test data acquisition and processing system, which is characterized by comprising a computer, a data acquisition module and a control board card, and is characterized in that the data acquisition module is respectively connected with low-voltage electrical test equipment and the computer and is used for acquiring a current signal of the low-voltage electrical test equipment after receiving an acquisition command sent by the computer; the method comprises the following steps: collecting a current signal of a low-voltage electrical test device, feeding back the current signal to a computer for analysis, generating a control instruction by the computer according to an analysis result, sending the control instruction to a control board card, and adjusting the current of the low-voltage electrical test device by the control board card through a two-stage adjustment method. The control instruction is generated to adjust the current, and the current is controlled to be stably adjusted through a two-stage adjustment method, so that direct manual operation of personnel on the electrical equipment is avoided, and the current control process is safer.

Description

Technical Field

[0001] The invention relates to the field of electrical measurement control, and in particular to a low-voltage electrical appliance test data acquisition and processing system and method. Background Art

[0002] Low-voltage data acquisition and measurement Low-voltage electrical appliance test data acquisition and processing system is a scientific instrument used in the fields of power and electrical engineering, electronics and communication technology, and the digital acquisition system effectively provides a more intuitive and simpler experience.

[0003] In the existing digital acquisition system, the control unit, acquisition unit, and feedback unit are independent units that require manual operation to complete the test. In the existing equipment, due to many factors such as external network voltage fluctuations and changes in internal resistance of the test product caused by long-term power-on, the current in the DC high current test is unstable during long-term power-on and needs to be adjusted in real time.

[0004] The traditional method for current control is to continuously and uninterruptedly adjust the current until it reaches the target value. Since there is a certain time delay from the change in current to the sending of the collected current data to the computer to analyze the control instructions, continuous and uninterrupted current adjustment will result in the current value exceeding the target value many times, affecting the working state of the electrical equipment. Summary of the invention

[0005] The purpose of the present invention is to provide a low-voltage electrical appliance test data acquisition and processing system and method in order to overcome the defect of the above-mentioned prior art that the current value exceeds the target value many times when the current is adjusted continuously and uninterruptedly.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] A low-voltage electrical test data acquisition and processing system comprises a computer, a data acquisition module and a control board. The data acquisition module is connected to the low-voltage electrical test equipment and the computer respectively, and is used to collect the current signal of the low-voltage electrical test equipment after receiving the collection command sent by the computer, and feed the current signal back to the computer for analysis. The computer generates a control instruction according to the analysis result, and sends the control instruction to the control board. The control board adjusts the current of the low-voltage electrical test equipment through a two-stage adjustment method.

[0008] Furthermore, the two-stage regulation method is: obtaining the current current value through the acquisition system; calculating the target current value, the target current interval and the inching adjustment interval according to the current current value; taking continuous and uninterrupted voltage increase or decrease regulation when the current current value is outside the inching adjustment interval; performing voltage inching adjustment when the current current value is within the inching adjustment interval, and setting a delay for the voltage inching adjustment until the current value is in the target current interval, and then stopping the adjustment.

[0009] Furthermore, the target current interval is 100% to 103% of the target current value, and the inching adjustment interval is 90% to 110% of the target current value.

[0010] Furthermore, the system includes a display device and an input device. The content displayed by the display device includes current data of each channel, a parameter setting panel and operation buttons. The setting is performed by clicking the relevant operation buttons through the input device.

[0011] Furthermore, the system includes an equipment self-checking system, and the equipment self-checking system checks contents including output gear, transformer range, loop power supply and voltage regulator.

[0012] Furthermore, the low-voltage electrical test equipment is provided with a conductive metal row group 5, the system includes a heat dissipation system, the heat dissipation system includes a fan group 1, a dust screen 2, a heat dissipation duct 3, an exhaust fan 4, an external cabinet 6 and a rectifier tube 7, the heat dissipation duct 3 has an air inlet 301 and an air outlet 302, the dust screen 2 is installed at the air inlet 301 and the air outlet 302, the fan group 1 and the exhaust fan 4 are installed in the heat dissipation duct 3, the air inlet 301 of the heat dissipation duct is installed on the external cabinet 6, the fan group 1 is on the inner side of the external cabinet 6, the exhaust fan 4 and the air outlet 302 of the heat dissipation duct are on the outer side of the external cabinet 6, the external cabinet 6 and the heat dissipation duct 3 have holes, the conductive metal row group 5 is inserted into the heat dissipation duct 3 through the holes, the connection between the conductive metal row group 5 and the hole is sealed with insulating material, and the rectifier tube 7 is installed on the part of the conductive metal row group 5 inserted into the heat dissipation duct 3.

[0013] A second aspect of the present invention is a method for collecting and processing low-voltage electrical appliance test data based on a low-voltage electrical appliance test data collection and processing system, comprising the following steps:

[0014] 1) System initialization;

[0015] 2) Set acquisition parameters, collect current data according to the acquisition parameters, and display them visually;

[0016] 3) Create a zero reference line in the visual interface to clear the data;

[0017] 4) Analyze the collected current data;

[0018] 5) Record the analysis results.

[0019] Furthermore, in step 4), when the data result is normal, step 5) is executed, and when the data result is abnormal, the process returns to step 2) and the acquisition parameters are reset.

[0020] Furthermore, after recording the current data results in step 5), the process returns to step 2) for the next data collection.

[0021] Furthermore, the visual display content includes waveform graphs of various acquisition parameters, and the method also includes a moment-by-moment comparison and analysis step: if time point data is received in any waveform graph for area zooming, the time point data is transmitted to other waveform graphs, and all waveform graphs in the corresponding area are zoomed in synchronously.

[0022] Compared with the prior art, the present invention has the following advantages:

[0023] (1) The present invention proposes a low-voltage electrical appliance test data acquisition and processing system, which analyzes the collected current signal through a computer, generates control instructions to adjust the current, and uses a two-stage adjustment method to control the current for stable regulation, thereby avoiding direct manual operation of electrical equipment by personnel, making the current control process safer.

[0024] (2) The present invention also includes a display device and an input device, which can monitor the system working status more intuitively and conveniently.

[0025] (3) The present invention also includes a heat dissipation system. By installing an exhaust fan at the air outlet of the heat dissipation duct, the air discharge rate at the air outlet is accelerated and the air pressure at the air outlet is reduced. At the same time, a pressure difference is formed between the fan group and the air inlet. The flow rate of air in the heat dissipation duct is increased through the wind tunnel effect, and the heat generated by electrical equipment due to excessive current and long-term operation is reduced, preventing the system from being damaged due to overheating. The connection is sealed and fixed by insulating material to avoid leakage of the external cabinet, avoid air flow turbulence in the heat dissipation duct and negative pressure inside the external cabinet, and realize the detachable installation of the heat dissipation equipment, which is convenient for replacement and maintenance.

[0026] (4) The present invention also includes an equipment self-checking system to monitor the working status of each component, thereby improving the stability and safety of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A flowchart for the system's work;

[0028] Figure 2 To display the current data page of each channel of the device;

[0029] Figure 3 To display the operation button page of the device;

[0030] Figure 4 Circuit diagram for analog signal input conversion;

[0031] Figure 5 The circuit diagram for automatic triggering;

[0032] Figure 6 The circuit diagram for the voltage stabilization program;

[0033] Figure 7 It is a structural diagram of the cooling system.

[0034] The markings in the figure are: 1. Fan group, 2. Dust screen, 3. Heat dissipation duct, 301. Heat dissipation duct air inlet, 302. Heat dissipation duct air outlet, 4. Exhaust fan, 5. Conductive copper busbar group, 6. External cabinet, 7. Rectifier tube. DETAILED DESCRIPTION

[0035] 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.

[0036] 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.

[0037] 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.

[0038] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the inventive product is usually placed when in use. They 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.

[0039] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0040] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0041] Example 1

[0042] The present invention is a low-voltage electrical test data acquisition and processing system, comprising a computer, a data acquisition module and a control board. The data acquisition module is connected to the low-voltage electrical test equipment and the computer respectively, and is used to collect the current signal of the low-voltage electrical test equipment after receiving the acquisition command sent by the computer, and feed the current signal back to the computer for analysis. The computer generates a control instruction according to the analysis result, and sends the control instruction to the control board. The control board adjusts the current of the low-voltage electrical test equipment through a two-stage adjustment method.

[0043] The system of this embodiment includes a computer, a data acquisition module and a control board, wherein the data acquisition module is a USB288X data acquisition card and a PCI Express bus data acquisition card. The working process of the system is as follows: the data acquisition module collects the current signal of the low-voltage electrical appliance in real time, feeds the current signal back to the computer, the computer makes a control instruction after the current changes, transmits the control instruction to the control board, and the control board adjusts the current of the low-voltage electrical test equipment through a two-stage adjustment method.

[0044] The specific method of two-stage adjustment is:

[0045] 1) Obtain the current current value through the acquisition system;

[0046] 2) Calculate the target current value, target current range and inching adjustment range according to the current current value;

[0047] 3) continuously increasing or decreasing the voltage of the current until the current value is within the inching adjustment range calculated in step 2);

[0048] 4) Perform multiple inching voltage step-up or step-down adjustments on the current current, wait for a certain period of time after each inching adjustment before performing the next inching adjustment, until the current current value is within the target current range.

[0049] Preferably, the target current interval is 100% to 103% of the target current value, and the inching adjustment interval is 90% to 110% of the target current value.

[0050] like Figure 1 The data acquisition and processing method of the present invention comprises the following steps:

[0051] 1) System initialization;

[0052] 2) Set acquisition parameters, collect current data according to the acquisition parameters, and display them visually;

[0053] 3) Create a zero reference line in the visual interface to clear the data;

[0054] 4) Analyze the collected current data;

[0055] 5) Record the analysis results.

[0056] Preferably, in step 4), when the data result is normal, step 5) is executed, and when the data result is abnormal, the process returns to step 2) and the acquisition parameters are reset.

[0057] Preferably, after recording the current data results in step 5), the process returns to step 2) for the next data collection.

[0058] Preferably, if Figure 2 and Figure 3 As shown, the system also includes a display device and an input device. The content displayed by the display device includes current data of each channel, a parameter setting panel and operation buttons. The settings are performed by clicking the relevant operation buttons through the input device.

[0059] Preferably, the waveform graphs of various acquisition parameters are displayed in the visualization interface, and the method also includes a moment-by-moment comparison and analysis step: if time point data is received in any waveform graph for area zooming, the time point data is transmitted to other waveform graphs, and all waveform graphs in the corresponding area are zoomed in synchronously.

[0060] like Figure 4 As shown, the continuous voltage signal received by the Rogowski coil is arranged into continuous numbers in rows through the library function.

[0061] like Figure 5 As shown, factors are obtained by comparison with standard parts, and the input waveform graph controls are multiplied and added in parallel to trigger conditions for display and calculation.

[0062] like Figure 6As shown in the figure, it is a two-stage regulation control circuit. After the system gives it an instruction, the voltage regulator will act immediately. However, when the system gives a stop instruction, the voltage regulator dial will continue to work for a small displacement due to inertia, and the actual current will deviate. When the actual current value is outside the target current range, the system determines to continue to increase or decrease the voltage. When it is within the target current range, it adopts a step-by-step increase or decrease, and leaves a time gap at the interval of the step-by-step. During this gap, the system determines whether the current meets the standard, and then makes corresponding instructions to increase or decrease the voltage or stop increasing or decreasing the voltage.

[0063] Preferably, if Figure 7 As shown, the low-voltage electrical test equipment is provided with a conductive metal row group 5, the system includes a heat dissipation system, the heat dissipation system includes a fan group 1, a dust screen 2, a heat dissipation duct 3, an exhaust fan 4, an external cabinet 6 and a rectifier tube 7, the heat dissipation duct 3 has an air inlet 301 and an air outlet 302, the dust screen 2 is installed at the air inlet 301 and the air outlet 302, the fan group 1 and the exhaust fan 4 are installed in the heat dissipation duct 3, the air inlet 301 of the heat dissipation duct is installed on the external cabinet 6, the fan group 1 is on the inner side of the external cabinet 6, the exhaust fan 4 and the air outlet 302 of the heat dissipation duct are on the outer side of the external cabinet 6, the external cabinet 6 and the heat dissipation duct 3 have holes, the conductive metal row group 5 is inserted into the heat dissipation duct 3 through the holes, the connection between the conductive metal row group 5 and the hole is sealed with insulating material, and the rectifier tube 7 is installed on the portion of the conductive metal row group 5 inserted into the heat dissipation duct 3.

[0064] In this embodiment, when the current is greater than 1000A, the exhaust fan starts to work; when the current is 5000A, the temperature will rise further and damage the electrical components, so the fan cooling test is stopped when the temperature reaches 150°.

[0065] In this test, except for the test that stopped halfway when cooling with only fan at 5000A, the other tests were all recorded after the power was on for 4 to 6 hours and the temperature was stable. The results are as follows (Table 1). It can be seen from the experimental results that when the current is greater than 1000A, the cooling system effectively reduces the temperature of the system.

[0066] Table 1 Temperature of the cooling system at different currents (℃)

[0067]

[0068]

[0069] Preferably, the system further comprises an equipment self-checking system, and the contents checked by the equipment self-checking system include output gear, transformer range, loop power supply and voltage regulator.

[0070] In this embodiment, after the system is initialized, the device control system is started, the device power is turned on, and the device self-check system is started to check the output gear, transformer range, loop power supply and voltage regulator.

[0071] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. A low voltage electrical appliance test data acquisition and processing system, characterized in that: It comprises a computer, a data acquisition module and a control board. The data acquisition module is connected to the low-voltage electrical test equipment and the computer respectively, and is used to collect the current signal of the low-voltage electrical test equipment after receiving the collection command sent by the computer, and feed the current signal back to the computer for analysis. The computer generates a control instruction according to the analysis result, and sends the control instruction to the control board. The control board adjusts the current of the low-voltage electrical test equipment through a two-stage adjustment method.

2. A low voltage electrical appliance test data acquisition and processing system according to claim 1, characterized in that: The two-stage regulation method is as follows: obtaining the current current value through an acquisition system; calculating the target current value, the target current interval and the inching regulation interval according to the current current value; taking continuous and uninterrupted step-up regulation or step-down regulation when the current current value is outside the inching regulation interval; performing voltage inching regulation when the current current value is within the inching regulation interval, and setting a delay for the voltage inching regulation until the current value is in the target current interval, and then stopping the regulation.

3. A low voltage electrical appliance test data acquisition and processing system according to claim 2, characterized in that: The target current interval is 100% to 103% of the target current value, and the inching adjustment interval is 90% to 110% of the target current value.

4. A low voltage electrical appliance test data acquisition and processing system according to claim 1, characterized in that: The system includes a display device and an input device. The content displayed by the display device includes current data of each channel, a parameter setting panel and operation buttons. The setting is performed by clicking the relevant operation buttons through the input device.

5. A low voltage electrical appliance test data acquisition and processing system according to claim 1, characterized in that: The system comprises an equipment self-checking system, and the contents checked by the equipment self-checking system include output gear, mutual inductor range, loop power supply and voltage regulator.

6. A low voltage electrical appliance test data acquisition and processing system according to claim 1, characterized in that: The low-voltage electrical test equipment is provided with a conductive metal row group (5), the system comprises a heat dissipation system, the heat dissipation system comprises a fan group (1), a dust screen (2), a heat dissipation pipe (3), an exhaust fan (4), an external cabinet (6) and a rectifier tube (7), the heat dissipation pipe (3) has an air inlet (301) and an air outlet (302), the dust screen (2) is installed at the air inlet (301) and the air outlet (302), the fan group (1) and the exhaust fan (4) are installed in the heat dissipation pipe (3), and the air inlet of the heat dissipation pipe (3) is The outlet (301) is mounted on the external cabinet (6), the fan group (1) is on the inner side of the external cabinet (6), the air outlet (302) of the exhaust fan (4) and the heat dissipation duct is on the outer side of the external cabinet (6), the external cabinet (6) and the heat dissipation duct (3) have holes, the conductive metal row group (5) is inserted into the heat dissipation duct (3) through the holes, the connection between the conductive metal row group (5) and the hole is sealed with insulating material, and the rectifier tube (7) is mounted on the portion of the conductive metal row group (5) inserted into the heat dissipation duct (3).

7. A method for collecting and processing low-voltage electrical appliance test data based on a low-voltage electrical appliance test data collection and processing system as claimed in any one of claims 1 to 6, characterized in that: The following steps are involved: 1) System initialization; 2) Set acquisition parameters, collect current data according to the acquisition parameters, and display them visually; 3) Create a zero reference line in the visual interface to clear the data; 4) Analyze the collected current data; 5) Record the analysis results.

8. A method for collecting and processing low-voltage electrical equipment test data according to claim 7, characterized in that: In step 4), when the data result is normal, execute step 5), and when the data result is abnormal, return to step 2) and reset the acquisition parameters.

9. A method for collecting and processing low-voltage electrical equipment test data according to claim 7, characterized in that: Step 5) After recording the current data results, return to step 2) for the next data collection.

10. A method for collecting and processing low-voltage electrical equipment test data according to claim 7, characterized in that: The visual display content includes waveform diagrams of various acquisition parameters, and the method also includes a simultaneous comparison and analysis step: if time point data is received in any waveform diagram for area zooming, the time point data is transmitted to other waveform diagrams, and all waveform diagrams in the corresponding area are zoomed in synchronously.

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