CN111537815A - Electromagnetic compatibility testing method, device, system and storage medium - Google Patents
Electromagnetic compatibility testing method, device, system and storage medium Download PDFInfo
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- CN111537815A CN111537815A CN202010258711.4A CN202010258711A CN111537815A CN 111537815 A CN111537815 A CN 111537815A CN 202010258711 A CN202010258711 A CN 202010258711A CN 111537815 A CN111537815 A CN 111537815A
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- 238000010586 diagram Methods 0.000 description 6
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- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/001—Measuring interference from external sources to, or emission from, the device under test, e.g. EMC, EMI, EMP or ESD testing
Abstract
The embodiment of the invention discloses a method, a device and a system for testing electromagnetic compatibility and a storage medium. The method comprises the following steps: determining the interference position of the electromagnetic interference generating device according to the test request; and acquiring an output signal of the sensor to be tested under the influence of the electromagnetic interference generating device, and determining a test result according to the output signal. According to the technical scheme, the interference position of the electromagnetic interference generating device can be dynamically determined according to the test request, and the sensor to be tested is automatically tested according to the position of the electromagnetic interference generating device, so that the requirement for testing the electromagnetic compatibility of the sensor to be tested is met.
Description
Technical Field
The embodiment of the invention relates to the technical field of testing, in particular to a method, a device and a system for testing electromagnetic compatibility and a storage medium.
Background
With the increasing requirements of users on the performance of vehicles, the electrification technology of automobiles is increasingly developed, and devices such as driving motors, engines and the like are continuously improved. The devices have the characteristics of high working voltage, high power and the like, and can form electromagnetic interference in the working process to influence the normal work of sensors on the vehicle, such as temperature, pressure, position and the like. Therefore, it is of great significance to test the electromagnetic compatibility of sensors such as temperature, pressure and position. The existing electromagnetic compatibility test scheme is not specific to the sensor, that is, the electromagnetic compatibility of the sensor cannot be effectively tested.
Disclosure of Invention
The embodiment of the invention provides a method, a device, a system and a storage medium for testing electromagnetic compatibility, which aim to solve the technical problem that the electromagnetic compatibility of a sensor cannot be effectively tested in the prior art.
In a first aspect, an embodiment of the present invention provides an electromagnetic compatibility testing method, including:
determining the interference position of the electromagnetic interference generating device according to the test request;
and acquiring an output signal of the sensor to be tested under the influence of the electromagnetic interference generating device, and determining a test result according to the output signal.
In a second aspect, an embodiment of the present invention further provides an electromagnetic compatibility testing apparatus, including:
the interference position determining module is used for determining the interference position of the electromagnetic interference generating device according to the test request;
and the test result determining module is used for acquiring an output signal of the sensor to be tested under the influence of the electromagnetic interference generating device and determining a test result according to the output signal.
In a third aspect, an embodiment of the present invention further provides an electromagnetic compatibility testing system, including: the device comprises a sensor to be tested, an electromagnetic interference generating device and a variable load diagnostic instrument;
one end of the sensor to be tested is connected with an input line, the other end of the sensor to be tested is connected with the variable load diagnostic instrument through an output line, the variable load diagnostic instrument is further connected with the electromagnetic interference generating device, and the electromagnetic interference generating device is respectively connected with the input line, the sensor to be tested and the output line through a first switch, a second switch and a third switch;
the electromagnetic interference generating device is used for generating an interference signal;
the variable load diagnostic instrument is used for determining the conduction state of the first switch, the second switch or the third switch according to a test request and determining a test result according to an output signal of the sensor to be tested.
In a fourth aspect, an embodiment of the present invention further provides a storage medium, on which a computer program is stored, where the program, when executed by a variable load diagnostic apparatus, implements the electromagnetic compatibility testing method according to the first aspect.
The embodiment of the invention provides a method, a device and a system for testing electromagnetic compatibility and a storage medium, wherein the interference position of an electromagnetic interference generating device is determined according to a test request; and acquiring an output signal of the sensor to be tested under the influence of the electromagnetic interference generating device, and determining a test result according to the output signal. According to the technical scheme, the interference position of the electromagnetic interference generating device can be dynamically determined according to the test request, and the sensor to be tested is automatically tested according to the position of the electromagnetic interference generating device, so that the requirement for testing the electromagnetic compatibility of the sensor to be tested is met.
Drawings
Fig. 1 is a flowchart of an electromagnetic compatibility testing method according to an embodiment of the present invention;
fig. 2 is a flowchart of an electromagnetic compatibility testing method according to a second embodiment of the present invention;
fig. 3 is a structural diagram of an electromagnetic compatibility testing apparatus according to a third embodiment of the present invention;
fig. 4 is a structural diagram of an electromagnetic compatibility testing system according to a fourth embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures. In addition, the embodiments and features of the embodiments in the present invention may be combined with each other without conflict.
Example one
Fig. 1 is a flowchart of an electromagnetic compatibility testing method according to an embodiment of the present invention, where the embodiment is applicable to testing whether a vehicle sensor is normal when subjected to electromagnetic interference, and the method may be executed by an electromagnetic compatibility testing apparatus, which may be implemented in a software and/or hardware manner and integrated in a variable load diagnostic apparatus.
The variable load diagnostic instrument is a device which can test whether a vehicle sensor can work normally when being subjected to electromagnetic interference of other devices. Optionally, the variable load diagnostic apparatus includes a power module, a load module, a data acquisition module, a data processing module, and a display module, which are connected in sequence, wherein the power module is configured to provide a power supply for the variable load diagnostic apparatus, for example, a 220V dc power supply may be provided according to a test requirement, and in order to prevent the load module from being operated by mistake and causing circuit overload and ablation, a fuse is further connected in series in the power module. The load module can comprise a rheostat and a multimeter and is used for simulating pull-up resistance values of ECUs (Electronic Control units) in different vehicle lines. The data acquisition module is used for acquiring the output signal of the sensor to be detected and sending the output signal to the data processing module. The data processing module is used for determining the abnormity of the sensor to be tested according to the output signal sent by the data acquisition module and generating a test result. The display module is used for displaying the test result. The variable load diagnostic instrument not only realizes the electromagnetic compatibility test of the sensor to be tested, but also has low cost.
Referring to fig. 1, an electromagnetic compatibility testing method provided by an embodiment of the present invention may include the following steps:
and S110, determining the interference position of the electromagnetic interference generating device according to the test request.
Optionally, the test request includes information such as an electromagnetic interference test, a location identifier of the electromagnetic interference generating device, a size and a frequency of the interference signal, and an interference time. And the variable load diagnostic instrument determines the interference position of the electromagnetic interference generating device according to the position identifier and controls the electromagnetic interference generating device to generate interference signals with corresponding magnitude and frequency in the set interference time. The electromagnetic interference generating device is a device capable of generating an interference signal, for example, a high-power device on a vehicle such as a motor, an engine, etc., the high-power device has a direct or indirect connection relationship with a sensor to be measured, and the electromagnetic interference formed during the operation affects the operation of the sensor to be measured in a conduction manner, wherein the sensor to be measured may be a temperature sensor, a pressure sensor, a position sensor, a rotation speed sensor, etc. on the vehicle. The conducted interference is interference generated on a sensor to be measured by connecting and transmitting an interference signal.
Of course, the electromagnetic interference generating device may also be a device that performs radiation interference on the sensor to be measured, and the radiation interference is generated by the electromagnetic interference generating device in a certain spatial range on the sensor to be measured, and this way, the electromagnetic interference generating device is not required to be connected with the sensor to be measured. In practical application, a proper electromagnetic interference generating device can be selected according to requirements. It should be noted that, when radiation interference is selected, the electromagnetic interference generating device and the interference position where the electromagnetic interference generating device is located can be placed in a dark box to be isolated from the outside, so as to prevent the influence of other external interference. The electromagnetic interference of the present embodiment is conducted interference as an example.
The interference position is a position where the electromagnetic interference generating device generates an interference signal, and may be, for example, an input line of the sensor to be measured, or may be a sensor to be measured, or may be an output line of the sensor to be measured. In practical application, different interference positions can be selected according to test requirements. When the interference position is the input line of the sensor to be detected, the interference signal generated by the electromagnetic interference generating device and the normal input signal of the sensor to be detected are superposed to be used as a new input signal to be input into the sensor to be detected. When the interference position is the sensor to be detected, the interference is directly carried out on the sensor to be detected. And when the interference position is the output line of the sensor to be detected, the interference on the output signal of the sensor to be detected is indicated.
And S120, acquiring an output signal of the sensor to be tested under the influence of the electromagnetic interference generating device, and determining a test result according to the output signal.
Specifically, the output signal of the sensor to be detected is acquired by the variable load diagnostic instrument, and the output signal is compared with the standard signal output by the sensor to be detected under the action of the normal input signal, so that whether the sensor to be detected can normally work under the influence of the electromagnetic interference generating device can be determined. In order to ensure the accuracy of the test result, optionally, the variable load diagnostic apparatus may be enabled to respectively acquire the output signal of the sensor to be tested under the interference condition and the standard signal under the non-interference condition at the same time. Optionally, the test result may be displayed after the test result is determined, and a specific display mode embodiment is not limited, for example, a schematic diagram of the sensor to be tested under the condition of interference and no interference and a schematic diagram of a difference curve between the output signal and the standard signal may be respectively displayed in the same coordinate system in a curve form, so that a user may visually know the electromagnetic compatibility of the sensor to be tested.
The embodiment of the invention provides an electromagnetic compatibility testing method, which comprises the steps of determining the interference position of an electromagnetic interference generating device according to a testing request; and acquiring an output signal of the sensor to be tested under the influence of the electromagnetic interference generating device, and determining a test result according to the output signal. The technical scheme can dynamically determine the interference position of the electromagnetic interference generating device according to the test request, and automatically test the sensor to be tested according to the position of the electromagnetic interference generating device, so that the requirement of testing the electromagnetic compatibility of the sensor to be tested is met.
Example two
Fig. 2 is a flowchart of an electromagnetic compatibility testing method according to a second embodiment of the present invention, which is embodied on the basis of the above embodiment, and referring to fig. 2, the method may include the following steps:
s210, determining the interference position of the electromagnetic interference generating device according to the test request.
S220, simultaneously acquiring an output signal to be detected output by the sensor to be detected under the influence of the electromagnetic interference generating device and a standard output signal output by the sensor to be detected without the influence of the electromagnetic interference generating device.
Optionally, in this embodiment, the variable load diagnostic apparatus acquires the output signals of the sensor to be tested, which are interfered and not interfered, at the same time, so as to ensure that the output signals and the standard signals correspond to the same time, and improve the accuracy of the test result. The signal output by the sensor to be tested when the sensor to be tested does not have interference is called a standard signal, and it should be noted that the initial input signals corresponding to the sensor to be tested when the sensor to be tested has interference and does not have interference are the same input signal. Optionally, the voltage of the sensor to be tested in the actual test of this embodiment is 5V.
And S230, whether the difference value of the output signal to be detected and the standard output signal is smaller than a set threshold value or not, if so, executing S240, otherwise, executing S250.
The size of the set threshold may be set according to actual needs, and the embodiment is not limited. Specifically, when the difference between the output signal to be measured and the standard output signal is smaller than the set threshold, it indicates that the sensor to be measured has good electromagnetic compatibility and strong anti-interference performance, and can still normally work when electromagnetic interference exists, otherwise, it is considered that the sensor to be measured has poor electromagnetic compatibility and weak anti-interference performance, and cannot normally work when electromagnetic interference exists, that is, the sensor to be measured fails.
And S240, determining that the sensor to be measured is normal.
And S250, determining that the sensor to be measured is invalid.
And S260, displaying the test result.
The second embodiment of the invention provides an electromagnetic compatibility testing method, which is characterized in that on the basis of the first embodiment, output signals of a sensor to be tested under the conditions of interference and no interference are simultaneously acquired through a variable load, so that the accuracy of a test result is ensured, and the test result is displayed, so that a user can visually know the electromagnetic compatibility of the sensor to be tested.
EXAMPLE III
Fig. 3 is a structural diagram of an electromagnetic compatibility testing apparatus according to a third embodiment of the present invention, which can execute the electromagnetic compatibility testing method according to the third embodiment, and with reference to fig. 3, the apparatus includes:
an interference position determining module 31, configured to determine an interference position of the electromagnetic interference generating apparatus according to the test request;
and the test result determining module 32 is configured to acquire an output signal of the sensor to be tested under the influence of the electromagnetic interference generating device, and determine a test result according to the output signal.
The embodiment of the invention provides an electromagnetic compatibility testing device, which determines the interference position of an electromagnetic interference generating device according to a testing request; and acquiring an output signal of the sensor to be tested under the influence of the electromagnetic interference generating device, and determining a test result according to the output signal. The interference position of the electromagnetic interference generating device is dynamically determined according to the test request, and the sensor to be tested is automatically tested according to the position of the electromagnetic interference generating device, so that the requirement of testing the electromagnetic compatibility of the sensor to be tested is met.
On the basis of the above embodiment, the interference position includes an input line, an output line, or the sensor to be measured of the sensor to be measured.
On the basis of the foregoing embodiment, the test result determining module 32 is specifically configured to:
simultaneously acquiring an output signal to be detected output by the sensor to be detected under the influence of the electromagnetic interference generating device and a standard output signal output by the sensor to be detected when the electromagnetic interference generating device is not influenced;
when the difference value between the output signal to be detected and the standard output signal is smaller than a set threshold value, determining that the sensor to be detected is invalid; otherwise, determining that the sensor to be detected is normal.
On the basis of the above embodiment, the apparatus further includes:
and the display module is used for displaying the test result after determining the test result according to the output signal.
The electromagnetic compatibility testing device provided by the embodiment of the invention can execute the electromagnetic compatibility testing method provided by the embodiment of the invention, and has corresponding functional modules and beneficial effects of the execution method.
Example four
Fig. 4 is a structural diagram of an electromagnetic compatibility testing system according to a fourth embodiment of the present invention, and referring to fig. 4, the system includes: a sensor 41 to be measured, an electromagnetic interference generating device 42, and a variable load diagnostic instrument 43;
one end of the sensor 41 to be tested is connected with the input line 44, the other end of the sensor 41 to be tested is connected with the variable load diagnostic instrument 43 through the output line 45, the variable load diagnostic instrument 43 is also connected with the electromagnetic interference generating device 42, and the electromagnetic interference generating device 42 is respectively connected with the input line 44, the sensor 41 to be tested and the output line 45 through the first switch S1, the second switch S2 and the third switch S3;
the electromagnetic interference generating device 42 is used for generating an interference signal;
the variable load diagnostic instrument 43 is used for determining the conduction state of the first switch S1, the second switch S2 or the third switch S3 according to the test request, and determining the test result according to the output signal of the sensor 41 to be tested.
The on states of the first switch S1, the second switch S2, and the third switch S3 may be controlled manually or automatically by the variable load diagnostic 43, and the embodiment exemplifies the automatic control by the variable load diagnostic 43. Optionally, the test request includes a location identifier of the electromagnetic interference generating device, and the location identifier has a unique mapping relationship with the first switch S1, the second switch S2, and the third switch S3, and the mapping relationship may be stored in advance and may be modified according to actual requirements. As shown in fig. 4, the position identifier of the electromagnetic interference generating device 42 on the input line 44 is associated with the first switch S1, the position identifier of the electromagnetic interference generating device 42 on the sensor 41 to be tested is associated with the second switch S2, and the position identifier of the electromagnetic interference generating device 42 on the output line is associated with the third switch S3.
Specifically, when the first switch S1 is turned on, the interference signal generated by the electromagnetic interference generating device 42 and the original input signal output by the input line 44 are mixed and input to the sensor 41 to be tested, and the variable load diagnostic instrument 43 can determine whether the sensor 41 to be tested fails when the electromagnetic interference generating device 42 is on the input line 44 according to the output signal of the output line 45. The testing process of the emi generating apparatus 42 at other locations is similar and will not be described herein. Optionally, the system operates at a voltage of 5V.
According to the electromagnetic compatibility test system provided by the embodiment of the invention, the variable load diagnostic instrument is used for controlling the conduction states of different switches, so that a proper interference position is selected for the electromagnetic interference generating device according to requirements, the automatic selection of the interference position is realized, and the variable load diagnostic instrument is used for collecting the output signal of the sensor to be tested, so that the test of the sensor to be tested is realized.
On the basis of the above embodiment, the system further includes a power supply module, the power supply module is connected to the input line and is configured to supply power to the electromagnetic compatibility testing system, and optionally, the power supply module is configured to provide a 5V regulated power supply.
The electromagnetic compatibility test system provided by the embodiment of the invention and the electromagnetic compatibility test method provided by the embodiment belong to the same inventive concept, and specific details can refer to the embodiment.
EXAMPLE five
Embodiments of the present invention also provide a storage medium having a computer program stored thereon, where the computer program is executed by a variable load diagnostic apparatus to implement the method for testing electromagnetic compatibility according to the above embodiments of the present invention.
Of course, the storage medium provided by the embodiment of the present invention includes computer-executable instructions, and the computer-executable instructions are not limited to the operations in the electromagnetic compatibility testing method described above, and may also perform related operations in the electromagnetic compatibility testing method provided by any embodiment of the present invention, and have corresponding functions and advantages.
From the above description of the embodiments, it is obvious for those skilled in the art that the present invention can be implemented by software and necessary general hardware, and certainly, can also be implemented by hardware, but the former is a better embodiment in many cases. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, and the computer software product may be stored in a computer-readable storage medium, such as a floppy disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a FLASH Memory (FLASH), a hard disk or an optical disk of a computer, and includes several instructions to enable a computer device (which may be a robot, a personal computer, a server, or a network device) to execute the electromagnetic compatibility testing method according to the foregoing embodiments of the present invention.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. An electromagnetic compatibility testing method, comprising:
determining the interference position of the electromagnetic interference generating device according to the test request;
and acquiring an output signal of the sensor to be tested under the influence of the electromagnetic interference generating device, and determining a test result according to the output signal.
2. The method of claim 1, wherein the disturbance location comprises an input line, an output line, or the sensor under test of the sensor under test.
3. The method of claim 1, wherein the obtaining an output signal of the sensor under test under the influence of the electromagnetic interference generating device and determining a test result according to the output signal comprises:
simultaneously acquiring an output signal to be detected output by the sensor to be detected under the influence of the electromagnetic interference generating device and a standard output signal output by the sensor to be detected when the electromagnetic interference generating device is not influenced;
when the difference value between the output signal to be detected and the standard output signal is smaller than a set threshold value, determining that the sensor to be detected is normal; otherwise, determining that the sensor to be tested is invalid.
4. The method of any of claims 1-3, further comprising, after determining a test result from the output signal:
and displaying the test result.
5. An electromagnetic compatibility testing apparatus, comprising:
the interference position determining module is used for determining the interference position of the electromagnetic interference generating device according to the test request;
and the test result determining module is used for acquiring an output signal of the sensor to be tested under the influence of the electromagnetic interference generating device and determining a test result according to the output signal.
6. The apparatus of claim 5, wherein the disturbance location comprises an input line, an output line, or the sensor under test of the sensor under test.
7. The apparatus of claim 5, wherein the test result determination module is specifically configured to:
simultaneously acquiring an output signal to be detected output by the sensor to be detected under the influence of the electromagnetic interference generating device and a standard output signal output by the sensor to be detected when the electromagnetic interference generating device is not influenced;
when the difference value between the output signal to be detected and the standard output signal is smaller than a set threshold value, determining that the sensor to be detected is invalid; otherwise, determining that the sensor to be detected is normal.
8. The apparatus of any one of claims 5-7, further comprising:
and the display module is used for displaying the test result after determining the test result according to the output signal.
9. An electromagnetic compatibility testing system, comprising: the device comprises a sensor to be tested, an electromagnetic interference generating device and a variable load diagnostic instrument;
one end of the sensor to be tested is connected with an input line, the other end of the sensor to be tested is connected with the variable load diagnostic instrument through an output line, the variable load diagnostic instrument is further connected with the electromagnetic interference generating device, and the electromagnetic interference generating device is respectively connected with the input line, the sensor to be tested and the output line through a first switch, a second switch and a third switch;
the electromagnetic interference generating device is used for generating an interference signal;
the variable load diagnostic instrument is used for determining the conduction state of the first switch, the second switch or the third switch according to a test request and determining a test result according to an output signal of the sensor to be tested.
10. A storage medium having stored thereon a computer program, characterized in that the program, when executed by a variable load diagnostic apparatus, implements the electromagnetic compatibility test method according to any one of claims 1 to 4.
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Application publication date: 20200814 |