阅读说明：本技术 测试装置、方法、计算机设备和存储介质 (Test apparatus, test method, computer device, and storage medium ) 是由 孙平 宋刚 李鸷 刘雪明 于 2019-09-17 设计创作，主要内容包括：本申请涉及一种测试装置、方法、计算机设备和存储介质。所述装置包括：近场测试模块,设置于被测件表面,用于检测所述被测件不同位置的近场信号,并将所述近场信号传输至控制器；空间测试模块,设置于所述被测件预设范围内,用于检测所述被测件预设范围内的空间信号,并将所述空间信号传输至控制器；控制器,分别与所述近场测试模块、空间测试模块电连接,用于接收所述近场信号和空间信号,并对所述近场信号和空间信号进行分析,确定所述被测件的干扰信号。采用上述装置,可对列车等大型设备进行干扰源定位测试,提高测试的精确度以及效率。(The application relates to a test apparatus, a method, a computer device and a storage medium. The device comprises: the near field test module is arranged on the surface of a tested piece and used for detecting near field signals of different positions of the tested piece and transmitting the near field signals to the controller; the space test module is arranged in the preset range of the tested piece and used for detecting a space signal in the preset range of the tested piece and transmitting the space signal to the controller; and the controller is respectively electrically connected with the near field test module and the space test module and is used for receiving the near field signal and the space signal, analyzing the near field signal and the space signal and determining an interference signal of the tested piece. By adopting the device, the positioning test of the interference source can be carried out on the large-scale equipment such as trains, and the accuracy and the efficiency of the test are improved.)

1. A test apparatus, the apparatus comprising:

the near field test module is arranged on the surface of a tested piece and used for detecting near field signals of different positions of the tested piece and transmitting the near field signals to the controller;

the space test module is arranged in the preset range of the tested piece and used for detecting a space signal in the preset range of the tested piece and transmitting the space signal to the controller;

and the controller is respectively electrically connected with the near field test module and the space test module and is used for receiving the near field signal and the space signal, analyzing the near field signal and the space signal and determining an interference signal of the tested piece.

2. The apparatus of claim 1, wherein the near field test module comprises:

the probe is arranged on the surface of the measured piece and used for detecting near-field signals of different positions of the measured piece;

the change-over switch is connected with the at least one probe and is used for switching on or switching off the near-field signal detected by the at least one probe;

and the receiver is respectively electrically connected with the switch and the controller and is used for receiving the near-field signal detected by the at least one probe which is conducted by the change-over switch and transmitting the near-field signal to the controller.

3. The apparatus of claim 1, wherein the spatial test module comprises:

the frequency spectrograph is arranged in the preset range of the tested piece, is electrically connected with the controller, and is used for receiving a spatial signal in the preset range of the tested piece and transmitting the spatial signal to the controller;

and the antenna is electrically connected with the frequency spectrograph and used for monitoring the space signal within the preset range of the tested piece and transmitting the space signal to the frequency spectrograph.

4. The apparatus of claim 1, further comprising:

and the power supply module is respectively connected with the receiver and the frequency spectrograph and is used for supplying power to the receiver and the frequency spectrograph.

5. A method of testing, the method comprising:

when the tested piece is in a simulated operation state, receiving a near field signal of the tested piece in a preset time, which is detected by a near field testing module, and a space signal of the tested piece in the preset time, which is detected by a space testing module;

and analyzing the near-field signal and the far-field signal in the preset time to determine the interference signal of the tested piece.

6. The method of claim 1, wherein analyzing the near-field signal and the far-field signal within the preset time to determine the interference signal of the tested piece comprises:

processing the near-field signal within the preset time by adopting an average detection method to obtain an average value of the near-field signal within the preset time;

processing the far-field signal within the preset time by adopting an average detection method to obtain the average value of the far-field signal within the preset time;

and if the average value of the near-field signals and the average value of the far-field signals in the preset time belong to the same type of signals, removing the same type of signals in the average value of the near-field signals in the preset time to obtain the interference signals of the tested piece.

7. A computer device comprising a memory and a processor, the memory storing a computer program, wherein the processor implements the steps of the method of any one of claims 5 to 6 when executing the computer program.

8. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of any one of claims 5 to 6.

Technical Field

The present application relates to the field of signal detection technologies, and in particular, to a test apparatus, a test method, a computer device, and a storage medium.

Background

The train radiation disturbance emission test is one of type tests for verifying whether a train meets related standards, and is a key test for determining whether a new train type can be delivered. Due to the characteristics of large volume, high power and operation on a specific line, the rail vehicle is determined to be generally incapable of being carried out in a conventional electromagnetic compatibility laboratory and difficult to carry out in an open place with ideal conditions. In practice, the problem that the test result exceeds the limit value occurs at this point, and the method for diagnosing the problem root cause commonly used in the electromagnetic compatibility laboratory is not applicable.

According to relevant standards, a train radiation disturbance emission test is a test in an outfield environment and comprises 2 working conditions of static state (the test limit value is a quasi-peak value) and slow motion (the test limit value is a peak value, the running speed range is 50 +/-10 km/h, the traction force is about 1/3 maximum traction force), the test distance adopted by the test is 10m, the method belongs to a far-field test, and when the problem of exceeding the limit value occurs, the far-field test is difficult to be used for positioning a disturbance source, and the disturbance source mainly emitted from the disturbance source cannot be distinguished because signals of the whole space are received by the far-field test.

Disclosure of Invention

In view of the above, it is necessary to provide a testing apparatus, a testing method, a computer device, and a storage medium for solving the above technical problems.

A test apparatus, the apparatus comprising:

the near field test module is arranged on the surface of a tested piece and used for detecting near field signals of different positions of the tested piece and transmitting the near field signals to the controller;

the space test module is arranged in the preset range of the tested piece and used for detecting a space signal in the preset range of the tested piece and transmitting the space signal to the controller;

and the controller is respectively electrically connected with the near field test module and the space test module and is used for receiving the near field signal and the space signal, analyzing the near field signal and the space signal and determining an interference signal of the tested piece.

In one embodiment, the near field test module comprises:

the probe is arranged on the surface of the measured piece and used for detecting near-field signals of different positions of the measured piece;

the change-over switch is connected with the at least one probe and is used for switching on or switching off the near-field signal detected by the at least one probe;

and the receiver is respectively electrically connected with the switch and the controller and is used for receiving the near-field signal detected by the at least one probe which is conducted by the change-over switch and transmitting the near-field signal to the controller.

In one embodiment, the spatial test module comprises:

the frequency spectrograph is arranged in the preset range of the tested piece, is electrically connected with the controller, and is used for receiving a spatial signal in the preset range of the tested piece and transmitting the spatial signal to the controller;

and the antenna is electrically connected with the frequency spectrograph and used for monitoring the space signal within the preset range of the tested piece and transmitting the space signal to the frequency spectrograph.

In one embodiment, the apparatus further comprises:

and the power supply module is respectively connected with the receiver and the frequency spectrograph and is used for supplying power to the receiver and the frequency spectrograph.

A method of testing, the method comprising:

when the tested piece is in a simulated operation state, receiving a near field signal of the tested piece in a preset time, which is detected by a near field testing module, and a space signal of the tested piece in the preset time, which is detected by a space testing module;

and analyzing the near-field signal and the far-field signal in the preset time to determine the interference signal of the tested piece.

In one embodiment, the analyzing the near-field signal and the far-field signal within the preset time to determine the interference signal of the tested piece includes:

processing the near-field signal within the preset time by adopting an average detection method to obtain an average value of the near-field signal within the preset time;

processing the far-field signal within the preset time by adopting an average detection method to obtain the average value of the far-field signal within the preset time;

and if the average value of the near-field signals and the average value of the far-field signals in the preset time belong to the same type of signals, removing the same type of signals in the average value of the near-field signals in the preset time to obtain the interference signals of the tested piece.

A computer device comprising a memory storing a computer program and a processor implementing the steps of the method as claimed in any one of the above when the computer program is executed.

A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of the preceding claims.

The testing device, the testing method, the computer equipment and the storage medium comprise a near-field testing module, a near-field testing module and a controller, wherein the near-field testing module is arranged on the surface of a tested piece and used for detecting near-field signals of different positions of the tested piece and transmitting the near-field signals to the controller; the space test module is arranged in the preset range of the tested piece and used for detecting a space signal in the preset range of the tested piece and transmitting the space signal to the controller; and the controller is respectively electrically connected with the near field test module and the space test module and is used for receiving the near field signal and the space signal, analyzing the near field signal and the space signal and determining an interference signal of the tested piece. By the device, the positioning test of the interference source can be performed on large equipment such as trains, and the accuracy and efficiency of the test are improved.

Drawings

FIG. 1 is a block diagram of a test apparatus according to an embodiment;

FIG. 2 is a schematic diagram of a test apparatus simulating dynamic behavior according to another embodiment;

FIG. 3 is a schematic diagram of the dynamic behavior of a test apparatus in another embodiment;

FIG. 4 is a diagram of an application environment of a testing method in one embodiment;

FIG. 5 is a flow diagram illustrating a testing method according to one embodiment;

FIG. 6 is a diagram illustrating an internal structure of a computer device according to an embodiment.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

A test device, see fig. 1 and 2, the device comprising:

the near field test module 100 is arranged on the surface of a tested piece, and is used for detecting near field signals of different positions of the tested piece and transmitting the near field signals to the controller;

the space test module 300 is arranged in the preset range of the tested piece, and is used for detecting a space signal in the preset range of the tested piece and transmitting the space signal to the controller;

and the controller 200 is electrically connected with the near field test module and the space test module respectively, and is configured to receive the near field signal and the space signal, analyze the near field signal and the space signal, and determine an interference signal of the tested piece.

In particular, whether the rail vehicle meets the regulations of the relevant standards requires the rail vehicle to be subjected to relevant tests. However, the rail vehicle has the characteristics of large volume, high power and running on a specific line, and a conventional method cannot be adopted for testing, namely, the interference source of the rail vehicle cannot be determined. The vehicle-mounted converter is a main high-power device on a railway vehicle, the working principle of the vehicle-mounted converter relates to a complex electromagnetic conversion process, and the vehicle-mounted converter is used as a tested piece for determining an interference source so as to carry out next electromagnetic compatibility correction and be used for positioning problem points and testing.

Further, the preset range refers to a whole circular area which is set according to the test requirement and takes the distance between the space test module 300 and the vehicle-mounted converter as a radius and the space test module 300 as a circle center, and the distance between the general space test module 300 and the vehicle-mounted converter is 10m (that is, the radius is 10m) or other values, which is not specifically limited in the present application. The near-field signal refers to a signal obtained by directly contacting the near-field test module 100 with the vehicle-mounted converter; the space signal refers to a signal (including) of a space detected when the space test module 300 is 10m away from the vehicle-mounted converter.

The testing device comprises a near-field testing module, a controller and a control module, wherein the near-field testing module is arranged on the surface of a tested piece and used for detecting near-field signals of different positions of the tested piece and transmitting the near-field signals to the controller; the space test module is arranged in the preset range of the tested piece and used for detecting a space signal in the preset range of the tested piece and transmitting the space signal to the controller; and the controller is respectively electrically connected with the near field test module and the space test module and is used for receiving the near field signal and the space signal, analyzing the near field signal and the space signal and determining an interference signal of the tested piece. By the device, the positioning test of the interference source can be performed on large equipment such as trains, and the accuracy and efficiency of the test are improved.

In one embodiment, the near field test module 100 comprises:

the probe 101 is arranged on the surface of a measured piece and used for detecting near-field signals of different positions of the measured piece;

a switch 102 connected to the at least one probe for turning on or off the near field signal detected by the at least one probe;

and the receiver 103 is electrically connected with the switch and the controller respectively, and is used for receiving the near-field signal detected by the at least one probe which is conducted by the change-over switch and transmitting the near-field signal to the controller.

Specifically, at least one probe 101 may include the near field probe 1011, the near field probe 1012, the near field probe 1013, and the like, and the number of probes is set as necessary. Each probe is connected to a switch, and when the switch is turned on to the near field probe 1011, the near field probe 1012 and the near field probe 1013 are turned off, the near field probe 1011 transmits the detected near field signal to the receiver 103, and the receiver 103 transmits the near field signal to the controller 200. Wherein the receiver 103 may be an EMI receiver or other type of receiver.

In one embodiment, the spatial test module 300 comprises:

the frequency spectrograph 301 is arranged in the preset range of the tested piece, electrically connected with the controller, and used for receiving a spatial signal in the preset range of the tested piece and transmitting the spatial signal to the controller;

and the antenna 302 is electrically connected with the frequency spectrograph and used for monitoring the space signal within the preset range of the tested piece and transmitting the space signal to the frequency spectrograph.

Specifically, for the acquisition of spatial signals, the present document employs a spectrometer 301 and an antenna 302. Spectrometer 301 is a hand-held spectrum analyzer and antenna 302 is a small broadband antenna.

In one embodiment, the apparatus further comprises:

and the power supply module 400 is respectively connected with the receiver and the frequency spectrograph and is used for supplying power to the receiver and the frequency spectrograph.

The above described device is an embodiment employed in simulating operating conditions, i.e. applying the mechanical brakes of the train, then simulating dynamic conditions with 5% traction. As shown in fig. 3, data at 100% tractive effort was measured in the high speed mode of operation during the true dynamic test. Namely, the device during dynamic testing comprises a receiver 103, a probe 101, a change-over switch 102 and a vehicle-mounted power supply module 500, wherein the receiver 103 is respectively connected with the change-over switch 102 and the vehicle-mounted power supply module 500, and the probe 101 is connected with the change-over switch 102.

The testing device is simple in structure, and the near-field probe is used for directly testing the vicinity of each unit (including a connecting cable) of the current transformer. Because the near-field test is different from the standard test (the standard test adopts a 10m far-field test), in order to identify the characteristics of the standard exceeding frequency band, different test parameters from those in the standard test need to be considered, and the test method is provided. The test method relates to the aspects of a substitution method which has the characteristics of highlighting an overproof frequency band, static simulation dynamic operation, slow running test and the like.

The testing method provided by the application can be applied to the application environment shown in fig. 4. The terminal 41 and the server 42 communicate with each other via a network. The terminal 41 obtains a near field signal of the tested piece detected by the near field test module within a preset time and a spatial signal of the tested piece detected by the spatial test module within the preset time. And transmitting the near field signal and the far field signal to the server 42, and analyzing the near field signal and the far field signal in the preset time by the server 42 to determine an interference signal of the detected piece. The terminal 41 may be, but not limited to, various personal computers, notebook computers, smart phones, tablet computers, and portable wearable devices, and the server 42 may be implemented by an independent server or a server cluster composed of a plurality of servers.

In one embodiment, as shown in fig. 5, a testing method is provided, which is exemplified by the method applied to the server 42 in fig. 4, and includes the following steps:

step S10: when the tested piece is in a simulated operation state, receiving a near field signal of the tested piece in a preset time, which is detected by a near field testing module, and a space signal of the tested piece in the preset time, which is detected by a space testing module;

step S20: and analyzing the near-field signal and the far-field signal in the preset time to determine the interference signal of the tested piece.

In steps S10-S20, the simulated operating conditions referred to herein are those in which the mechanical brakes of the rail vehicle are applied and then 5% tractive effort is used to simulate dynamic conditions.

In one embodiment, the step S20 includes:

step S21: processing the near-field signal within the preset time by adopting an average detection method to obtain an average value of the near-field signal within the preset time;

step S22: processing the far-field signal within the preset time by adopting an average detection method to obtain the average value of the far-field signal within the preset time;

step S23: and if the average value of the near-field signals and the average value of the far-field signals in the preset time belong to the same type of signals, removing the same type of signals in the average value of the near-field signals in the preset time to obtain the interference signals of the tested piece.

The core method of the invention is a method for accurately identifying the characteristics of the superstandard frequency band:

a. receiver detector configuration: as described above, the standard test method adopts the method that static and dynamic limits are given for static and dynamic tests respectively, and quasi-peak and peak detection is adopted for a corresponding receiver, but considering that a near field may have more narrow pulse interference, the interference energy is not large, and the identification of near field emission characteristics may be influenced, the method of the invention adopts the average detection method, which is different from the method in the standard.

b. The external field space signal is monitored by adopting a broadband small antenna and a handheld spectrum analyzer so as to identify that the external interference signal is actually identified by the antenna effect of the train connecting cable in the near field test, and the Zero-Span function of the receiver is also used for further identifying the external interference.

c. The invention provides a method for replacing the running mode of a tested train with different standards, and because a large number of repeated tests are needed in the diagnosis process, the invention provides a method for dynamically running by utilizing static simulation, which comprises the following steps: the mechanical brakes of the train are applied and then 5% tractive effort is used to simulate dynamic conditions. In the real dynamic test, the data at 100% traction was measured using the high speed mode of operation.

d. The invention adopts the battery for power supply, thereby avoiding the common mode interference of the train from passing the interference test of the power supply system.

It should be understood that, although the steps in the flowchart of fig. 5 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least a portion of the steps in fig. 5 may include multiple sub-steps or multiple stages that are not necessarily performed at the same time, but may be performed at different times, and the order of performance of the sub-steps or stages is not necessarily sequential, but may be performed in turn or alternately with other steps or at least a portion of the sub-steps or stages of other steps.

In one embodiment, a computer device is provided, which may be a server, and its internal structure diagram may be as shown in fig. 6. The computer device includes a processor, a memory, a network interface, and a database connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The database of the computer device is used for storing relevant data. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to implement a testing method.

Those skilled in the art will appreciate that the architecture shown in fig. 6 is merely a block diagram of some of the structures associated with the disclosed aspects and is not intended to limit the computing devices to which the disclosed aspects apply, as particular computing devices may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.

In one embodiment, a computer device is provided, comprising a memory and a processor, the memory having a computer program stored therein, the processor implementing the following steps when executing the computer program:

when the tested piece is in a simulated operation state, receiving a near field signal of the tested piece in a preset time, which is detected by a near field testing module, and a space signal of the tested piece in the preset time, which is detected by a space testing module;

and analyzing the near-field signal and the far-field signal in the preset time to determine the interference signal of the tested piece.

In one embodiment, a computer-readable storage medium is provided, having a computer program stored thereon, which when executed by a processor, performs the steps of:

when the tested piece is in a simulated operation state, receiving a near field signal of the tested piece in a preset time, which is detected by a near field testing module, and a space signal of the tested piece in the preset time, which is detected by a space testing module;

and analyzing the near-field signal and the far-field signal in the preset time to determine the interference signal of the tested piece.

It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.