CN212321738U - Detection apparatus for sensor magnetic field noise immunity - Google Patents
Detection apparatus for sensor magnetic field noise immunity Download PDFInfo
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- CN212321738U CN212321738U CN202020233778.8U CN202020233778U CN212321738U CN 212321738 U CN212321738 U CN 212321738U CN 202020233778 U CN202020233778 U CN 202020233778U CN 212321738 U CN212321738 U CN 212321738U
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Abstract
The utility model discloses a detection apparatus for sensor magnetic field noise immunity, include: a coil for generating a magnetic field; a power source electrically connected to the coil; a controller electrically connected to the power source; a sensor disposed within the coil; the testing tool is in signal connection with the sensor and is used for measuring the output of the sensor and judging the interference degree of the sensor by the magnetic field. The utility model is used for the sensor detects at 4000(A/m) magnetic field noise immunity, and the magnetic field size is adjustable simultaneously, also can be used to the noise immunity in different magnetic fields and detect.
Description
Technical Field
The utility model relates to an electromagnetic environment check out test set's of car technical field especially relates to a detection device of sensor magnetic field noise immunity.
Background
With the development of society, more and more electronic products are applied to automobiles, and the electromagnetic environment of the whole automobile is complex, so that the anti-magnetic field interference capability of the automobile electronic products draws wide attention. ISO11452-8 states that the generator, transmission line and some powerful electrical devices (such as motor) in the automobile generate a strong magnetic field, and the on-board electronic products exposed to the magnetic field perform the test, and the magnetic field strength defined by the standard can reach 1000(A/m) at most. Due to the popularization of electric vehicles, vehicle-mounted electronic products are more and more applied, sensors with magnetic fields are more and more, and some host factories require that the magnetic field strength resisting magnetic field interference reaches 4000(A/m), so that equipment for detecting the magnetic field immunity is indispensable.
Disclosure of Invention
Aiming at the problems that the existing vehicle-mounted electronic product needs to carry out magnetic field immunity detection, the detection device of the magnetic field immunity of the DD sensor is provided, is used for detecting the magnetic field immunity of the DD sensor at 4000(A/m), and can be used for detecting the immunity of different magnetic fields, and the size of the magnetic field is adjustable.
The specific technical scheme is as follows:
a sensor magnetic field immunity detection apparatus, comprising:
a coil for generating a magnetic field;
a power source electrically connected to the coil;
a controller electrically connected to the power source;
a sensor disposed within the coil;
the testing tool is in signal connection with the sensor and is used for measuring the output of the sensor and judging the interference degree of the sensor by the magnetic field.
The detection device for the magnetic field immunity of the sensor is characterized in that the coil comprises a hollow tube and an enameled copper wire wound on the periphery of the hollow tube, the enameled copper wire is electrically connected with the power supply, and the sensor is placed in the hollow tube.
In the device for detecting magnetic field immunity of the sensor, the hollow tube is a hollow circular tube.
The detection device for the magnetic field immunity of the sensor is characterized in that the outer diameter of the hollow tube is 90mm, the inner diameter of the hollow tube is 84mm, and the length of the hollow tube is 200 mm.
The detection device for the magnetic field immunity of the sensor is characterized in that the hollow tube is made of plastic.
The winding turns of the enameled copper wire are N-500 turns, the effective magnetic path length of the enameled copper wire is Le-160 mm, and the equivalent impedance of the enameled copper wire is 8 Ω.
The above-mentioned detection apparatus for sensor magnetic field immunity, wherein, the test tool includes: CANalyzer and Scope, wherein the CANalyzer and the Scope are respectively connected with the sensor signal.
Compared with the prior art, the technical scheme has the positive effects that:
(1) the utility model has simple structure and low cost, can be used for detecting the magnetic field immunity of the sensor, can detect the immunity of a 4000(A/m) magnetic field, and has the characteristic of adjustable magnetic field size;
(2) the utility model discloses a portable's device, portable.
Drawings
Fig. 1 is a schematic view of the overall structure of a device for detecting magnetic field immunity of a sensor according to the present invention;
in the drawings: 1. a coil; 2. a power source; 3. a controller; 4. a sensor; 5. a test tool; 6. a hollow tube; 7. enamelling copper wires; 8. CANalyzer; 9. scope.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific embodiments, but the present invention is not limited thereto.
Fig. 1 is the utility model relates to a detection apparatus's of sensor magnetic field noise immunity overall structure schematic diagram, as shown in fig. 1, the detection apparatus of sensor magnetic field noise immunity of a preferred embodiment is shown, include: coil 1, power 2, controller 3, sensor 4 and testing tool 5, coil 1 is used for producing the magnetic field, and power 2 is connected with coil 1 electricity, and controller 3 is connected with power 2 electricity, and sensor 4 places in coil 1, and testing tool 5 is connected with sensor 4 signal, and testing tool 5 is used for measuring the output of sensor 4, and is used for judging the degree of interference that sensor 4 received the magnetic field.
Further, as a preferred embodiment, the coil 1 comprises a hollow tube 6 and an enameled copper wire 7 wound on the outer periphery of the hollow tube 6, the enameled copper wire 7 is electrically connected with the power supply 2, and the sensor 4 is placed in the hollow tube 6.
Further, as a preferred embodiment, the test tool 5 includes: CANalyzer8 and Scope9, CANalyzer8 and Scope9 are respectively in signal connection with the sensor 4.
Preferably, the CANalyzer8 is a network analysis testing tool and the CANalyzer8 is a general analysis tool for network and distributed system development.
Preferably, Scope9 is a bus analyzer, a comprehensive CAN bus development and testing professional tool.
Preferably, an overload protector is provided between the power source 2 and the coil 1, the overload protector being used to prevent the controller 3 from being damaged.
The above is merely an example of the preferred embodiments of the present invention, and the embodiments and the protection scope of the present invention are not limited thereby.
The utility model discloses still have following embodiment on above-mentioned basis:
in a further embodiment of the present invention, please continue to refer to fig. 1, the hollow tube 6 is a hollow circular tube.
In a further embodiment of the present invention, the outer diameter of the hollow tube 6 is 90mm, the inner diameter of the hollow tube 6 is 84mm, and the length of the hollow tube 6 is 200 mm.
In a further embodiment of the present invention, the hollow tube 6 is made of plastic.
The utility model discloses a further embodiment, the winding turns of enameled copper wire 7 is 500 circles for N, and the effective magnetic circuit length of enameled copper wire 7 is 160mm for Le, and the equivalent impedance of enameled copper wire 7 is 8 omega.
The controller 3 of the utility model controls the power supply to output 12V voltage, and obtains the conduction current I1.5A according to the formula I U/R; according to the magnetic field intensity formula H-NxI/Le, the magnetic field intensity H-4687A/m is obtained.
The utility model places the sensor 4 in the magnetic field, the CANalyzer8 can measure the range of the value output from the sensor deviating from the theoretical value, and the degree of the sensor 4 interfered by the magnetic field can be judged; scope9 may redundantly determine whether its output deviates from the normal range.
The utility model discloses the size change of 3 control power outputs of controller can change the size in magnetic field, so the utility model discloses can also detect the noise immunity in different magnetic fields.
The utility model discloses a portable's device, portable.
The above description is only an example of the preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and those skilled in the art should be able to realize the equivalent alternatives and obvious variations of the present invention.
Claims (7)
1. A sensor magnetic field immunity detection apparatus, comprising:
a coil for generating a magnetic field;
a power source electrically connected to the coil;
a controller electrically connected to the power source;
a sensor disposed within the coil;
the testing tool is in signal connection with the sensor and is used for measuring the output of the sensor and judging the interference degree of the sensor by the magnetic field.
2. The sensor magnetic field immunity detection device of claim 1, wherein the coil comprises a hollow tube and an enameled copper wire wound around the periphery of the hollow tube, the enameled copper wire is electrically connected to the power supply, and the sensor is placed in the hollow tube.
3. The apparatus for detecting the magnetic field immunity of a sensor according to claim 2, wherein said hollow tube is a hollow circular tube.
4. The sensor magnetic field immunity detection device of claim 3, wherein the outer diameter of the hollow tube is 90mm, the inner diameter of the hollow tube is 84mm, and the length of the hollow tube is 200 mm.
5. The sensor of claim 2, wherein the hollow tube is made of plastic.
6. The device for detecting the magnetic field immunity of the sensor according to claim 2, wherein the number of winding turns of the enameled copper wire is 500, the effective magnetic path length of the enameled copper wire is 160mm, and the equivalent impedance of the enameled copper wire is 8 Ω.
7. The apparatus for detecting the magnetic field immunity of a sensor according to claim 1, wherein said testing tool comprises: CANalyzer and Scope, wherein the CANalyzer and the Scope are respectively connected with the sensor signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020233778.8U CN212321738U (en) | 2020-03-02 | 2020-03-02 | Detection apparatus for sensor magnetic field noise immunity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020233778.8U CN212321738U (en) | 2020-03-02 | 2020-03-02 | Detection apparatus for sensor magnetic field noise immunity |
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| Publication Number | Publication Date |
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| CN212321738U true CN212321738U (en) | 2021-01-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020233778.8U Active CN212321738U (en) | 2020-03-02 | 2020-03-02 | Detection apparatus for sensor magnetic field noise immunity |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113391205A (en) * | 2021-07-19 | 2021-09-14 | 德丰电创科技股份有限公司 | Device and system for verifying immunity of constant magnetic field |
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2020
- 2020-03-02 CN CN202020233778.8U patent/CN212321738U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113391205A (en) * | 2021-07-19 | 2021-09-14 | 德丰电创科技股份有限公司 | Device and system for verifying immunity of constant magnetic field |
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