Current transformer-based air handling unit rapid test method, device, and medium

Abstract

The application provides a kind of air conditioning unit rapid test method, device and medium based on current transformer.The method comprises: obtaining standard current value and detector type of current transformer group;Based on the standard current value, the current transformer group is calibrated before test;Respectively when vehicle is powered off and powered on, control current transformer group to collect three-phase current information of each electrical element in air conditioning unit at the same time, obtain first receiving voltage, first detection current, second receiving voltage and second detection current, and then obtain the target conversion formula corresponding to the detector type;Control current transformer group to collect real-time test data in the process of vehicle operation, and obtain target test result according to target conversion formula and real-time test data.The application can optimize the measurement process of three-phase current by combining the parameters of vehicle in the process of power off, power on and actual operation, improve the accuracy of test result, and is simple to operate and easy to implement.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of rail vehicle technology, in particular to a rapid test method and device for an air conditioning unit based on current transducers and a medium. BACKGROUND

[0002] In order to avoid faults of rail passenger cars after loading, it is necessary to detect the three-phase current values of electrical components in the air conditioning unit at any time under various working conditions before loading, so the synchronization, accuracy and rapidity of detection are particularly important.

[0003] In the prior art, when performing air conditioning ground tests, an operator uses a clamp-on ammeter to measure the three-phase current values of each device at different times according to the wire numbers. This test method cannot measure the three-phase current values of the same electrical component in the air conditioning unit at the same time, and the measurement accuracy is not high, and the measurement efficiency is also very low. In order to improve the synchronization and accuracy of test results, multiple current transducers are used to simultaneously measure the current of each phase circuit of each electrical component. However, even if the current transducers are produced in the same batch, their own measurement accuracy will still differ, which will affect the measurement results to some extent.

[0004] Therefore, when using multiple current transducers to test the air conditioning unit, it is necessary to optimize the measurement values to make the final test results have higher accuracy. SUMMARY

[0005] The embodiments of the present application provide a rapid test method and device for an air conditioning unit based on current transducers and a medium to solve the problem of low accuracy of measurement results caused by different measurement accuracies of current transducers when using multiple current transducers to perform tests according to the existing air conditioning ground test method.

[0006] In a first aspect, the embodiments of the present application provide a rapid test method for an air conditioning unit based on current transducers, comprising:

[0007] obtaining a standard current value and a type of a detection device of a current transducer group;

[0008] calibrating the current transducer group before testing based on the standard current value;

[0009] controlling the current transducer group to collect three-phase current information of each electrical component in the air conditioning unit at the same time when the vehicle is powered off, to obtain a first received voltage and a first detected current; and controlling the current transducer group to collect three-phase current information of each electrical component in the air conditioning unit at the same time when the vehicle is powered on, to obtain a second received voltage and a second detected current;

[0010] According to the first receiving voltage, the first detection current, the second receiving voltage and the second detection current, a target conversion formula corresponding to the detection device type is obtained.

[0011] The control current transmitter group collects real-time test data of the vehicle in operation, and according to the target conversion formula and the real-time test data, a target test result is obtained.

[0012] In a possible implementation, the standard current value is obtained, including:

[0013] The input reference current value is received.

[0014] It is detected whether the input reference current value exceeds a preset current threshold.

[0015] If the input reference current value does not exceed the preset current threshold, the input reference current value is taken as the standard current value.

[0016] In a possible implementation, the calibration of the current transmitter group before the test based on the standard current value includes:

[0017] The standard current value is loaded to a loop composed of a plurality of current transmitters in series, and initial current detection values corresponding to the plurality of current transmitters are obtained respectively.

[0018] According to the initial current detection values and the standard current value, the calibration of the current transmitter group before the test is performed.

[0019] In a possible implementation, the calibration of the current transmitter group before the test according to the initial current detection values and the standard current value includes:

[0020] According to the initial current detection values and the standard current value, an initial matrix and a standard matrix are respectively constructed.

[0021] The difference between the initial matrix and the standard matrix is calculated to obtain a check matrix.

[0022] It is detected whether an element in the check matrix exceeds a preset deviation value.

[0023] If an element exceeding the preset deviation value is detected, the current transmitter corresponding to the element exceeding the preset deviation value is calibrated.

[0024] In a possible implementation, the detection device type of the current transmitter group includes a compressor, a ventilator, a condenser fan or an air preheater.

[0025] In a possible implementation, according to the first receiving voltage, the first detection current, the second receiving voltage and the second detection current, a target conversion formula corresponding to the detection device type is obtained, including:

[0026] According to the first receiving voltage and the first detection current, a first conversion formula corresponding to the detection device type and a first optimization parameter are obtained;

[0027] According to the second receiving voltage and the second detection current, a second optimization parameter corresponding to the detection device type is obtained;

[0028] According to the first optimization parameter and the second optimization parameter, the first conversion formula is optimized to obtain a target conversion formula corresponding to the detection device type.

[0029] In a possible implementation, the current transformer group controls to collect real-time test data of the vehicle during operation, and according to the target conversion formula and the real-time test data, a target test result is obtained, including:

[0030] During the operation of the vehicle, the current transformer group controls to collect three-phase current information of each electrical element in the air conditioning unit at the same time to obtain real-time receiving voltage and real-time detection current;

[0031] According to the real-time receiving voltage and the real-time detection current, a third optimization parameter is obtained;

[0032] According to the third optimization parameter, the target conversion formula is corrected in real time to obtain a target optimization conversion formula corresponding to the detection device type;

[0033] According to the real-time receiving voltage, the real-time detection current and the target optimization conversion formula, a target test result is obtained.

[0034] In the second aspect, the embodiments of the present application provide an air conditioning unit rapid test device based on a current transformer, which is applied to the air conditioning unit rapid test method in the first aspect or any possible implementation of the first aspect. The device includes a current transformer group, a plurality of analog-to-digital converters, an AC three-phase voltmeter and a controller.

[0035] The current transformer group is a loop composed of a plurality of current transformers connected in series;

[0036] Each current transformer is connected to a phase line of any electrical element in the air conditioning unit;

[0037] Each analog-to-digital converter is connected to a plurality of current transformers, one end of the AC three-phase voltmeter is connected to a plurality of analog-to-digital converters, and the other end of the AC three-phase voltmeter is connected to the controller.

[0038] In a possible implementation, the air conditioning unit rapid test device further includes a printer, a box body and a plug; wherein the printer is connected to the controller and is used to print the target test result.

[0039] In a third aspect, the embodiments of the present application provide a computer readable storage medium storing a computer program, which, when executed by a processor, implements the steps of the air conditioning unit rapid test method according to the first aspect or any possible implementation of the first aspect.

[0040] The embodiments of the present application provide an air conditioning unit rapid test method and device based on current transmitters. The current transmitter group is used to collect three-phase current information of each electrical element in the air conditioning unit at the same time when the vehicle is powered off and powered on, and the target conversion formula corresponding to the detector type is obtained by combining the parameters in the actual running process of the vehicle, and then the target test result is obtained. In addition, before the test starts, the loop composed of a plurality of current transmitters in series is calibrated to enhance the reliability of the measurement data. The present application can optimize the measurement process of three-phase current by combining the parameters in the process of powering off, powering on and actual running of the vehicle, improve the accuracy of the measurement result, and is simple to operate and easy to implement. BRIEF DESCRIPTION OF DRAWINGS

[0041] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0042] Figure 1 is the implementation flowchart of the air conditioning unit rapid test method based on current transmitters provided by the embodiments of the present application;

[0043] Figure 2 is the implementation flowchart of the standard current value acquisition method provided by the embodiments of the present application;

[0044] Figure 3 is the implementation flowchart of the calibration method of the current transmitter group provided by the embodiments of the present application;

[0045] Figure 4 is the implementation flowchart of the target conversion formula calculation method provided by the embodiments of the present application;

[0046] Figure 5 is the implementation flowchart of the target test result calculation method provided by the embodiments of the present application;

[0047] Figure 6 is the circuit structure schematic diagram of the air conditioning unit rapid test device based on current transmitters provided by the embodiments of the present application;

[0048] Figure 7It is an appearance structure schematic diagram of the air conditioning unit rapid test device provided by the embodiment of the present application. DETAILED DESCRIPTION

[0049] In the following description, for the purpose of explanation and not limitation, specific details are set forth, such as particular system configurations, techniques, etc., in order to provide a thorough understanding of the embodiments of the present application. However, it will be apparent to those skilled in the art that the present application can be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.

[0050] In order to avoid the rail passenger car from malfunctioning after loading, the three-phase current values of the electrical components (including the compressor, the ventilator, the condensing fan and the air preheater) in the air conditioning unit under various working conditions at any time are detected before loading, and the deviation of any one-phase current from the average value of the three-phase current is not greater than a certain percentage, such as 10%, of the average value of the three-phase current, wherein the deviation of any one-phase current of the three-phase current of the compressor from the average value of the three-phase current of the compressor is not greater than a certain percentage, such as 5%, of the average value of the three-phase current of the compressor. Therefore, the synchronism, accuracy and rapidity during detection are particularly important.

[0051] In the traditional air conditioning unit test method, the three-phase current values of the electrical components are measured by the operator using a clamp ammeter according to the wire numbers. The specific operation process is as follows: (1) switch the air conditioning unit to the refrigeration working condition; (2) the operator finds the corresponding wire harness of the air conditioning unit according to the wire table, and then the operator measures the three-phase current values of the compressor 1, the compressor 2, the ventilator, the condensing fan 1, the condensing fan 2, the air preheater 1 and the air preheater 2 according to the wire numbers, a total of 21 three-phase current values; (3) fill the measured data in the “Air Conditioning Unit Ground Test Measured Current Value Record Table”, and calculate the maximum current deviation; (4) compare the test results with the test requirements, and give the final test results; (5) switch to the heating working condition, and measure again according to the above process.

[0052] The above traditional air conditioning unit test method cannot measure the three-phase current values of the same electrical component at the same time, and the measurement accuracy is not high due to the influence of the measurement method and the measurement tool. Moreover, the operator needs to measure and record the detection results one by one according to the wire numbers, which has the problems of high labor intensity, low reliability and low efficiency. In order to improve the synchronism and accuracy of the test results, multiple current transmitters are used to simultaneously measure the current of each phase circuit of each electrical component. However, even the current transmitters produced in the same batch have different measurement accuracies, which also affects the measurement results to some extent.

[0053] In order to make the purpose, technical solutions and advantages of the present application clearer, specific embodiments will be described below with reference to the drawings.

[0054] Figure 1 The implementation flowchart of the air conditioning unit rapid test method based on the current transformer provided by the embodiments of the present application is described in detail as follows.

[0055] In step 101, the standard current value and the detection device type of the current transformer group are obtained.

[0056] In some embodiments, the detection device type of the current transformer group can include a compressor, a ventilator, a condenser fan or an air preheater.

[0057] In the implementation process, the detection device type of the current transformer group can be determined according to the actual needs of the air conditioning unit test. At present, the three-phase current values of the first compressor, the second compressor, the ventilator, the first condenser fan, the second condenser fan, the first air preheater and the second air preheater in the air conditioning unit are generally obtained. Among them, the currents of the first compressor, the second compressor, the first air preheater and the second air preheater are relatively large, and the corresponding measurement branches are a total of 12. Taking the maximum current value AC18A corresponding to these devices as an example, 24 current transformers with a range of AC20A can be selected. The currents of the first condenser fan, the second condenser fan and the ventilator are relatively small, and the corresponding measurement branches are a total of 9. Taking the maximum current not exceeding AC10A corresponding to these devices as an example, 18 current transformers with a range of AC10A can be selected. Further, in order to facilitate the management of current transformers during the test, the range can be selected according to the maximum current value corresponding to these devices, for example, current transformers with a range of AC20A can be selected.

[0058] In order to meet the range requirement, the current transformers used for measurement can adopt a perforated form. For the measurement branches corresponding to the first condenser fan, the second condenser fan and the ventilator, current transformers with 2 turns of perforation can be selected. For the measurement branches corresponding to the first compressor, the second compressor, the first air preheater and the second air preheater, current transformers with 1 turn of perforation can be selected. Therefore, a total of 42 current transformers with a range of AC20A are used in this embodiment, and the output current of which carries the collected three-phase current information, and the range of the output current is DC 4mA-20mA.

[0059] In some embodiments, the specific processing when obtaining the standard current value in step 101 can be as follows:

[0060] In step 201, the input reference current value is received.

[0061] Specifically, the operator can input a given reference current value, and the reference range is AC 0-5A.

[0062] Step 202, detecting whether the input reference current value exceeds a preset current threshold.

[0063] During the test, the size of the reference current value is strictly controlled, and is not allowed to exceed AC 20A, otherwise it will cause permanent damage to the current transducer.

[0064] Step 203, if the input reference current value does not exceed the preset current threshold, the input reference current value is taken as the standard current value.

[0065] In actual operation, if the measurement of the current transducer is to be more accurate, it is necessary to test the performance of the current transducer before the test. If the input reference current value meets the preset standard, it is taken as the standard current value to check the current transducer group.

[0066] Step 102, calibrating the current transducer group before the test based on the standard current value.

[0067] In some embodiments, the specific processing of step 102 can be as follows:

[0068] First, load the standard current value to the loop formed by the plurality of current transducers in series, and obtain the initial current detection value corresponding to each current transducer.

[0069] Specifically, the current transducer for measurement is connected in series by a wire to form a loop detection line, and the standard current value is loaded to the loop detection line to calibrate the current transducer group once.

[0070] Second, calibrate the current transducer group before the test according to the initial current detection value and the standard current value.

[0071] Specifically, after loading the standard current value to the loop detection line to obtain the initial current detection value corresponding to each measurement branch, the detection performance of the current transducer can be judged by judging whether the obtained initial current detection value exceeds the preset error range.

[0072] In some embodiments, when calibrating the current transducer group before the test according to the initial current detection value and the standard current value, the specific processing flow can be as follows:

[0073] Step 301, according to the initial current detection value and the standard current value, respectively constructing the corresponding initial matrix and standard matrix.

[0074] In some embodiments, the initial matrix I B can be constructed according to the obtained initial current detection value, and the standard matrix I S can be constructed according to the standard current value.

[0075] Step 302: Calculate the difference between the initial matrix and the standard matrix to obtain the verification matrix.

[0076] In some embodiments, it can be based on I V =I B -I S The verification matrix is ​​obtained;

[0077] Among them, I V This represents the parity check matrix.

[0078] Step 303: Check each element in the verification matrix to see if it exceeds the preset deviation value.

[0079] In some embodiments, the preset deviation value can be set according to the target measurement accuracy of the test. The smaller the preset deviation value, the higher the measurement accuracy of the calibrated current transmitter.

[0080] Step 304: If an element exceeding the preset deviation value is detected, the current transmitter corresponding to the element exceeding the preset deviation value is calibrated.

[0081] In some embodiments, if the check matrix I is detected V If any element exceeds the preset deviation value, the corresponding measurement branch is located, and the current transmitter on that measurement branch is calibrated.

[0082] Step 103: When the vehicle is powered off, the control current transmitter group collects the three-phase current information of each electrical component in the air conditioning unit at the same time to obtain the first receiving voltage and the first detection current; and when the vehicle is powered on, the control current transmitter group collects the three-phase current information of each electrical component in the air conditioning unit at the same time to obtain the second receiving voltage and the second detection current.

[0083] In some embodiments, the current transmitter is controlled to collect three-phase current information when the vehicle is powered off and when it is powered on. During this process, a signal transmission system using current transmission and voltage reception is employed. The current transmitter collects the three-phase current of each electrical component in the air conditioning unit, converts the physical quantity into a DC 4-20mA current output, obtains the receiving voltage corresponding to the output current, and processes the received voltage to obtain the detection current to be processed.

[0084] Taking the test process when the vehicle is powered off as an example, when the vehicle is powered off, the control current transmitter group collects the three-phase current of each electrical component in the air conditioning unit to obtain the first received voltage U. fi For the first received voltage U fi After data processing, the first detected current Y is obtained. fi .

[0085] Step 104, obtaining a target conversion formula corresponding to the detection device type according to the first received voltage, the first detected current, the second received voltage and the second detected current.

[0086] In some embodiments, the specific processing of step 104 can be as follows:

[0087] Step 401, obtaining a first conversion formula and a first optimization parameter corresponding to the detection device type according to the first received voltage and the first detected current.

[0088] In some embodiments, the first conversion formula corresponding to the detection device type can be calculated according to the following formula:

[0089] Y fi = k1U fi + m 1i , i = 1, 2, …, 42;

[0090] Wherein, k1 represents the first conversion coefficient, m 1i represents the first optimization parameter, and i corresponds to 42 measurement branches.

[0091] Step 402, obtaining a second optimization parameter corresponding to the detection device type according to the second received voltage and the second detected current.

[0092] In some embodiments, the second optimization parameter corresponding to the detection device type can be calculated according to the following formula:

[0093]

[0094] Wherein, m 2i represents the second optimization parameter, Y si represents the second detected current, and U si represents the second received voltage.

[0095] Step 403, optimizing the first conversion formula according to the first optimization parameter and the second optimization parameter to obtain a target conversion formula corresponding to the detection device type.

[0096] In some embodiments, the target conversion formula corresponding to the detection device type can be calculated according to the following formula:

[0097]

[0098] Wherein, m 3i is a constant.

[0099] Step 105, controlling the current transmitter group to collect real-time test data of the vehicle during operation, and obtaining a target test result according to the target conversion formula and the real-time test data.

[0100] In some embodiments, the specific processing of step 105 can be as follows:

[0101] Step 501, during the operation of the vehicle, the current transducer group is controlled to collect the three-phase current information of each electrical element in the air conditioning unit at the same time, and obtain the real-time receiving voltage and real-time detection current.

[0102] In some embodiments, during the operation of the vehicle, the current transducer group is controlled to collect the three-phase current information of each electrical element in the air conditioning unit at the same time, and obtain the real-time receiving voltage U Bi and real-time detection current Y Bi .

[0103] Step 502, according to the real-time receiving voltage and the real-time detection current, the third optimization parameter is obtained.

[0104] In some embodiments, the third optimization parameter can be calculated according to the following formula:

[0105]

[0106] Wherein, k represents the third optimization parameter.

[0107] It should be noted that the size of n can be selected according to the number of detection devices of the same type.

[0108] Step 503, according to the third optimization parameter, the target conversion formula is corrected in real time, and the target optimization conversion formula corresponding to the type of detection device is obtained.

[0109] In some embodiments, the target optimization conversion formula corresponding to the type of detection device can be calculated according to the following formula:

[0110]

[0111] Wherein, X i represents the detection current that has not been arranged.

[0112] Step 504, according to the real-time receiving voltage, the real-time detection current and the target optimization conversion formula, the target test result is obtained.

[0113] In some embodiments, after obtaining the real-time receiving voltage, the real-time receiving voltage can be processed according to the above target optimization conversion formula to obtain the detection current X i that needs to be arranged.

[0114] It should be noted that before displaying the target test result, the detection current that needs to be arranged needs to be arranged first, and the arrangement formula is as follows:

[0115] Y i = Ki X i +Y 0i ;

[0116] wherein Y i is the displayed detection current data, K i represents a proportional constant, Y 0i is a zero point value. When the input reference current value is zero, Y i =Y 0i , at which time the loop detection line is cleared.

[0117] Specifically, the detection current X i to be arranged is substituted into the above arrangement formula, the proportional constant K i is obtained and stored, and the actual displayed target test result Y i is calculated by using the obtained proportional constant K i .

[0118] The above embodiment provides a rapid test method for an air conditioning unit based on a current transformer. The first receiving voltage and the first detection current are obtained by using a current transformer group to collect three-phase current information of each electrical element in the air conditioning unit at the same time when the vehicle is powered off, and a first conversion formula is calculated. The first conversion formula is modified by using the current transformer group to collect a second receiving voltage and a second detection current when the vehicle is powered on. Then, the target conversion formula is optimized by combining parameters in the actual running process of the vehicle, and a target test result is obtained. Moreover, before the test starts, the loop formed by the series connection of the plurality of current transformers is calibrated, and the accuracy of the test result is improved.

[0119] It should be understood that the sequence numbers of the steps in the above embodiment do not mean the order of execution, and the execution order of the processes should be determined according to their functions and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present application.

[0120] The following is a device embodiment of the present application. For details not described in detail, reference can be made to the corresponding method embodiments described above.

[0121] Figure 6 The structure of the rapid test device for the air conditioning unit based on the current transformer provided by the embodiment of the present application is shown. The device can be applied to the rapid test method for the air conditioning unit in the above method embodiment. For the convenience of description, only the parts related to the embodiment of the present application are shown, and the details are as follows.

[0122] As Figure 6 shown, the rapid test device for the air conditioning unit provided by the embodiment of the present application mainly includes a current transformer group, a plurality of analog-to-digital converters 602, an AC three-phase voltmeter 603, and a controller 604.

[0123] And, the current transformer group is a loop composed of a plurality of current transformers 601 connected in series, each of which is connected to a phase line of any electrical element in the air conditioning unit. In addition, each analog-to-digital converter 602 is connected to a plurality of current transformers 601, one end of the alternating current three-phase voltmeter 603 is connected to a plurality of analog-to-digital converters 602, and the other end of the alternating current three-phase voltmeter 603 is connected to the controller 604.

[0124] In some embodiments, as shown again in Figure 6 The air conditioning unit rapid test device can further include a printer 605; wherein the printer 605 is connected to the controller 604, and is used to print the target test result.

[0125] Specifically, the target test result can be printed by the printer 605, and the step of recording the test result by the operator is omitted, which is more efficient and faster.

[0126] In some embodiments, as shown in Figure 7 The air conditioning unit rapid test device can further include a box 701 and a plug 702.

[0127] Specifically, the power supply input cable is connected to the external power supply (three-hole single-phase socket), and the L, N and PE lines are correctly connected. After confirming that the power supply wiring is correct, the three-hole single-phase plug 702 is connected to the socket to supply power to the air conditioning unit rapid test device.

[0128] The embodiment of the present application provides an air conditioning unit rapid test device based on a current transformer, which can quickly and efficiently measure the three-phase current of each electrical element in the air conditioning unit, the measurement process is not affected by the detection method of the operator, and the target test result can be output by the printer, the step of recording the test result by the operator is omitted, and the operation time is saved.

[0129] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the above-mentioned division of each functional unit and module is exemplified, and in actual application, the above-mentioned functions can be completed by different functional units and modules according to needs, that is, the internal structure of the device is divided into different functional units or modules to complete all or part of the functions described above. Each functional unit and module in the embodiment can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit. The above-mentioned integrated unit can be realized in the form of hardware or software. In addition, the specific names of each functional unit and module are only for the convenience of mutual distinction, and do not limit the protection scope of the present application. The specific working process of the units and modules in the above system can refer to the corresponding process in the foregoing method embodiments, which will not be described here.

[0130] In the above embodiments, the description of each embodiment has its own emphasis, and the parts not described or recorded in detail in a certain embodiment can be referred to the related description of other embodiments.

[0131] Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be realized in electronic hardware or a combination of computer software and electronic hardware. Whether the functions are executed in hardware or software depends on the specific application and design constraints of the technical solution. A person skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0132] In the embodiments provided by the present application, it should be understood that the disclosed apparatus / terminal and method can be implemented by other ways. For example, the above-mentioned apparatus / terminal embodiments are only schematic, and the division of the modules or units is only a logical function division, and there can be another division way in actual implementation, for example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection can be indirect coupling or communication connection through some interface, device or unit, and can be electrical, mechanical or other forms.

[0133] The units described as separate components can or can not be physically separated, and the components shown as units can or can not be physical units, that is, they can be located in one place, or can be distributed on multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiment.

[0134] In addition, each function unit in each embodiment of the present application can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of a software function unit.

[0135] The integrated module / unit, if realized in the form of a software function unit and sold or used as an independent product, can be stored in a computer readable storage medium. Based on such understanding, all or part of the processes in the above-mentioned embodiment methods can also be completed by a computer program instructing related hardware, and the computer program can be stored in a computer readable storage medium. When the computer program is executed by a processor, the steps of each of the above-mentioned current transformer-based air conditioning unit rapid test methods can be implemented. The computer program includes computer program code, which can be in the form of source code, object code, an executable file, or some intermediate form, etc. The computer readable medium can include any entity or device capable of carrying the computer program code, a recording medium, a U disk, a mobile hard disk, a magnetic disk, an optical disk, a computer memory, a read-only memory (ROM), a random access memory (RAM), an electrical carrier signal, a telecommunication signal, and a software distribution medium, etc.

[0136] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A method for rapid testing of an air conditioning unit based on a current transducer, characterized in that, The method comprises the following steps: acquiring a standard current value and a detection device type of a current transmitter group; pre-test calibration of the current transmitter group based on the standard current value; when the vehicle is powered off, controlling the current transmitter group to collect three-phase current information of each electrical element in the air conditioning unit at the same time to obtain a first received voltage and a first detected current; and when the vehicle is powered on, controlling the current transmitter group to collect three-phase current information of each electrical element in the air conditioning unit at the same time to obtain a second received voltage and a second detected current; obtaining a target conversion formula corresponding to the detection device type according to the first received voltage, the first detected current, the second received voltage and the second detected current; controlling the current transmitter group to collect real-time test data of the vehicle during operation, and obtaining a target test result according to the target conversion formula and the real-time test data; the method of obtaining a target conversion formula corresponding to the detection device type according to the first received voltage, the first detected current, the second received voltage and the second detected current comprises: obtaining a first conversion formula and a first optimization parameter corresponding to the detection device type according to the first received voltage and the first detected current; obtaining a second optimization parameter corresponding to the detection device type according to the second received voltage and the second detected current; optimizing the first conversion formula according to the first optimization parameter and the second optimization parameter to obtain a target conversion formula corresponding to the detection device type.

2. The air conditioning unit quick test method of claim 1, wherein, the method of obtaining a standard current value comprises: receiving an input reference current value; detecting whether the input reference current value exceeds a preset current threshold; if the input reference current value does not exceed the preset current threshold, taking the input reference current value as a standard current value.

3. The air conditioning unit quick test method of claim 2, wherein, the method of pre-test calibration of the current transmitter group based on the standard current value comprises: loading the standard current value on a loop composed of a plurality of current transmitters in series to obtain initial current detection values corresponding to the plurality of current transmitters respectively; pre-test calibration of the current transmitter group according to the initial current detection values and the standard current value.

4. The air conditioning unit quick test method of claim 3, wherein, the method of pre-test calibration of the current transmitter group according to the initial current detection values and the standard current value comprises: constructing an initial matrix and a standard matrix corresponding respectively according to the initial current detection values and the standard current value; calculating the difference between the initial matrix and the standard matrix to obtain a verification matrix; detecting whether an element in the verification matrix exceeds a preset deviation value one by one; if an element exceeding the preset deviation value is detected, calibrating the current transmitter corresponding to the element exceeding the preset deviation value.

5. The air conditioning unit quick test method of claim 1, wherein, The detection device type of the current transmitter group comprises a compressor, a ventilator, a condenser fan or an air preheater.

6. The air conditioning unit quick test method of claim 1, wherein, the method of controlling the current transmitter group to collect real-time test data of the vehicle during operation, and obtaining a target test result according to the target conversion formula and the real-time test data comprises: During the operation of the vehicle, the current transducer group collects the three-phase current information of each electrical element in the air conditioning unit at the same time, and obtains real-time receiving voltage and real-time detection current; According to the real-time receiving voltage and the real-time detection current, a third optimization parameter is obtained; According to the third optimization parameter, the target conversion formula is corrected in real time to obtain a target optimization conversion formula corresponding to the type of the detection device; According to the real-time receiving voltage, the real-time detection current and the target optimization conversion formula, a target test result is obtained.

7. A current transformer based air handling unit quick test device, comprising: The device is applied to the air conditioning unit rapid test method of any one of claims 1 to 6, and the device comprises a current transducer group, a plurality of analog-to-digital converters, an alternating current three-phase voltmeter and a controller; The current transducer group is a loop composed of a plurality of current transducers connected in series; Each of the current transducers is connected to a phase line of any electrical element in the air conditioning unit; Each of the analog-to-digital converters is connected to a plurality of current transducers, one end of the alternating current three-phase voltmeter is connected to the plurality of analog-to-digital converters, and the other end of the alternating current three-phase voltmeter is connected to the controller.

8. The air conditioning unit quick test device of claim 7, wherein, The device further comprises a printer; wherein the printer is connected to the controller and is used for printing the target test result.

9. A computer-readable storage medium storing a computer program, the computer program comprising instructions that, when executed by a computer, cause the computer to perform the method of any one of claims 1 to 8. The computer program is executed by a processor to realize the steps of the air conditioning unit rapid test method of any one of claims 1 to 6.

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