CN211653016U - Device for checking electromagnetic radiation standard exceeding emission source of vehicle-mounted system - Google Patents
Device for checking electromagnetic radiation standard exceeding emission source of vehicle-mounted system Download PDFInfo
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- CN211653016U CN211653016U CN201922086778.XU CN201922086778U CN211653016U CN 211653016 U CN211653016 U CN 211653016U CN 201922086778 U CN201922086778 U CN 201922086778U CN 211653016 U CN211653016 U CN 211653016U
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- wire harness
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- electromagnetic shielding
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Abstract
The utility model discloses an inspection device of electromagnetic radiation emission source that exceeds standard of on-vehicle system. The electromagnetic shielding box and the wiring harness junction box are connected to a vehicle-mounted electric control system for electromagnetic compatibility test, a radiation frequency spectrum diagram of the vehicle-mounted system is collected in a semi-anechoic chamber, and whether a superscript radiation source generates space radiation through an electric control unit or conduction disturbance emission from a connected wiring harness can be judged through the frequency spectrum diagram. The utility model discloses a vehicle-mounted system provides the direction and the foundation of rectification through the electromagnetic compatibility test.
Description
Technical Field
A method for checking an electromagnetic radiation overproof emission source of a vehicle-mounted system. The electromagnetic shielding box and the wiring harness junction box are connected to a vehicle-mounted electric control system for electromagnetic compatibility test, a radiation frequency spectrum diagram of the vehicle-mounted system is collected in a semi-anechoic chamber, and whether a superscript radiation source generates space radiation through an electric control unit or conduction disturbance emission from a connected wiring harness can be judged through the frequency spectrum diagram. The method provides an improved direction and basis for the vehicle-mounted system to pass the electromagnetic compatibility test.
Background
Electromagnetic compatibility (EMC) testing, including testing of radiated emissions from an onboard electronic control system. For the over-standard radiation energy of the vehicle-mounted system, the adjustment and the modification are usually carried out by means of design experience, and whether a spectrogram is improved or not is observed. This is blind to rectification, since the uncertain emission source is likely to fail the radiation emission test at a great time and cost, and the progress of product development is affected.
Disclosure of Invention
In order to examine the position of the electromagnetic radiation emission source of waiting to detect the product more quickly and simply, the utility model provides an on-vehicle system's electromagnetic radiation exceeds standard the investigation device of emission source.
The utility model discloses technical scheme realizes like this:
the utility model discloses an electromagnetic shield box, pencil terminal box, system electrical control unit and system load, be equipped with system electrical control unit in the electromagnetic shield box, the probe end of spectrometer stretches into the electromagnetic shield box in order to survey the electromagnetic radiation intensity in the electromagnetic shield box, one of them side of electromagnetic shield box is opened has the through-hole, the one end of connecting pencil one is connected with system electrical control unit, the other end of connecting pencil one is connected with one end of pencil terminal box after passing the through-hole, the other end of pencil terminal box is connected with system load through connecting pencil two again; the two ends of the wiring harness junction box are respectively provided with the same female end sockets, the two female end sockets are connected through a plurality of ship-shaped switches, and each ship-shaped switch controls the connection and disconnection of the corresponding path; and under the conduction state, the system electric control unit is communicated to the system load sequentially through the first connecting wire harness, the wire harness junction box and the second connecting wire harness.
The upper cover of the electromagnetic shielding box is hinged with the box body of the electromagnetic shielding box, the upper cover and the box body are buckled and connected through a buckle structure, and the contact area between the lower surface of the upper cover and the cross section of the box body is tightly filled with conductive sponge to prevent electromagnetic leakage; the through hole of the electromagnetic shielding box is tightly filled with conductive sponge, the middle part of the conductive sponge is provided with a notch, a first connecting wire harness is connected with an external wire harness junction box through the notch penetrating the conductive sponge, and the electromagnetic shielding box enables the interior to form a closed area through the filling of the two conductive sponges, so that the electromagnetic leakage degree is reduced to the maximum degree.
The two ends of the wiring harness junction box are a socket U1 and a socket U2 respectively, the socket U1 and the socket U2 are provided with a plurality of connecting ports, and the connecting mode of each ship-shaped switch is the same: one end of the ship-shaped switch is connected to one of the connection ports of the socket U1, the other end of the ship-shaped switch is connected to one of the connection ports of the socket U2, and the connection ports of any two ship-shaped switches connected to the socket U1 and the socket U2 are different.
One end of the first connecting wire harness connected with the system electric control unit is of a female end connecting structure, the other end of the first connecting wire harness is of a male end connecting structure, and two ends of the second connecting wire harness are of male end connecting structures.
The electromagnetic shielding box is made of metal materials.
The utility model has the advantages that: the utility model discloses utilize the electromagnetic leakage condition of spectrum analysis instrument survey electrical control unit to the position of rapid positioning interference source. The problem of blindness in correcting the overproof electromagnetic radiation is solved to a certain extent, and time and test cost are saved for products to pass a radiation emission test.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic circuit diagram of the wiring harness junction box M2.
Fig. 3 is a schematic diagram of the operation of the present invention for identifying and positioning the interference source.
Fig. 4 is a structural view of the harness junction box M2.
In the figure: m1-an electromagnetic shielding box, M2-a wiring harness junction box, M3-an electronic control unit, M4-a system load, M5-a connecting wire speed I and M6-a connecting wiring harness II.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and examples.
As shown in fig. 1, the utility model discloses by electromagnetic shield box M1, pencil terminal box M2, system electrical control unit M3 and system load M4, a connection pencil M5, six module composition system electrical control unit M3 of two M6 of connection pencil are placed in electromagnetic shield box M1, link to each other system electrical control unit M3 and pencil terminal box M2 one end through a connection pencil M5. The other end of the wiring harness junction box M2 is connected to the system load M4 through a connecting wiring harness II M6.
The electromagnetic shielding box M1 is made of metal materials, the upper surface of the shielding box can move, the upper surface can be opened and closed, the periphery of the inner part of the upper surface is provided with conductive sponge, and the M1-electromagnetic shielding box can be sealed due to the existence of a buckle structure. The right side of the electromagnetic shielding box M1 is provided with a round opening, and a round conductive sponge is plugged in the round opening. An opening gap is formed in the middle of the conductive sponge. The connecting wire harness M5 passes through the round sponge at the round side of the M1-electromagnetic shielding box to be connected with the wire harness. The upper cover is sealed through the buckle and the conductive sponge, and the conductive sponge can enable the electric conduction of the gap to be continuous, so that the electromagnetic leakage is prevented. The round sponge on the side edge is connected to the round opening for sealing in the same way.
Two ends of the 2-wiring harness junction box are respectively provided with an identical female end socket. M5-connecting harness 1, one end of which is female end, the other end is male end. M6-the structure where both ends of the connection harness 2 are male.
As shown in fig. 4, the wire harness junction box M2 has two female sockets U1, U2, and the number of the boat switches is 50, and the boat switch J1 is taken as an example for explanation. As shown in fig. 2, the No. 14 signal line of the rocker switch J1 is connected to one end of the rocker switch J1, and the other end of the J1 is connected to the No. 3 end of the U2. The ship-shaped switch can be used for controlling the connection and disconnection of the connection line. The remaining signal connections of U1 and U2 are similar. The utility model discloses an in being connected to electromagnetic shield box, pencil terminal box to the on-vehicle electrical system who carries out the electromagnetic compatibility test, gather on-vehicle system's radiation frequency spectrogram in the semi-anechoic chamber, can differentiate through the frequency spectrogram that the superscript radiation source is through the space radiation of electrical control unit production, still comes from the conduction harassment transmission of the pencil of connecting.
As shown in fig. 3, the utility model is used as follows:
1. the vehicle-mounted system electric control unit which does not pass the radiation emission test is placed in an electromagnetic shielding box M1 to wait for examination, an upper cover of the electromagnetic shielding box M1 is sealed to form a semi-electric wave dark room, the vehicle-mounted system electric control unit is connected with one end of a wiring harness junction box M2 through a connecting wiring harness I M5, and the other end of the wiring harness junction box M2 is connected with a system load M4 through a connecting wiring harness I M6.
2. Closing all ship-shaped switches on the M2-wire harness junction box to enable one path corresponding to each ship-shaped switch to be in a conducting state, then carrying out an electromagnetic radiation test in an electromagnetic compatibility test laboratory, and if the emission energy is observed to be obviously reduced to be capable of passing the test in an overproof frequency band in a spectrogram obtained by the test, judging that the emission source is from the space radiation of the electric control unit; at the moment, the subsequent direction correction mainly aims at the shell structure and the material of the electric control unit. The subsequent specific positioning and rectification verification of the position of the noise source emitted by the product radiation is shown in fig. 3, and the probe of the spectrometer is used for detecting, so that whether the rectification measure is used for effectively reducing the noise of the overproof frequency band is verified.
3. And if the detected result in the spectrogram is not obviously improved and reduced, judging that the emission standard exceeding is not caused by the space radiation of the electric control unit. Next, the connection mode of step 1 is maintained, and all the remaining signal lines are disconnected by the ship-type switch except for the necessary connection of the feeder line in the harness connector box M2. And performing an electromagnetic radiation test in the electromagnetic compatibility test laboratory again, if the emission energy is obviously reduced to pass the test in an overproof frequency band in the spectrogram obtained by the test, judging that the emission source is from a power supply wire harness, and then performing subsequent rectification mainly on the filtering of a power supply line at the interface of the M3-electronic control unit.
4. Further, if the above operation is performed, there is no significant spectral energy in the out-of-band. The ship-type switches are closed to open the signal lines one by one, one signal line is opened and conducted each time, electromagnetic radiation testing is conducted in an electromagnetic compatibility testing laboratory, if emission energy is observed in a spectrogram obtained through testing when a certain signal line is opened, the test frequency spectrum obviously rises on an overproof frequency band, the signal line is judged to be an emission source, and at the moment, subsequent rectification and modification mainly aim at filtering at a socket of the signal line.
The utility model discloses an in being connected to electromagnetic shield box, pencil terminal box to the on-vehicle electrical system who carries out the electromagnetic compatibility test, gather on-vehicle system's radiation spectrogram in the anechoic chamber to judge the source of emission source, and then provide the direction and the foundation of rectifying and changing for on-vehicle system passes through the electromagnetic compatibility test. The time and the cost for rectifying the electromagnetic radiation standard exceeding problem of the product are reduced to a certain extent, and the product development progress is accelerated.
Claims (4)
1. The utility model provides a device of investigation of on-vehicle system electromagnetic radiation emission source that exceeds standard which characterized in that: the electromagnetic shielding device comprises an electromagnetic shielding box (M1), a wire harness junction box (M2), a system electronic control unit (M3) and a system load (M4), wherein the system electronic control unit (M3) is arranged in the electromagnetic shielding box (M1), the probe end of a spectrometer extends into the electromagnetic shielding box (M1), a through hole is formed in one side surface of the electromagnetic shielding box (M1), one end of a first connecting wire harness (M5) is connected with the system electronic control unit (M3), the other end of the first connecting wire harness (M5) penetrates through the through hole and then is connected with one end of the wire harness junction box (M2), and the other end of the wire harness junction box (M2) is connected with the system load (M4) through a second connecting wire harness (M6); the two ends of the wiring harness junction box (M2) are respectively provided with the same female end sockets, the two female end sockets are connected through a plurality of ship-shaped switches, and each ship-shaped switch controls the connection and disconnection of the corresponding path; the upper cover of the electromagnetic shielding box (M1) is hinged with the box body of the electromagnetic shielding box (M1), the upper cover and the box body are buckled and connected through a buckle structure, and the contact area between the lower surface of the upper cover and the cross section of the box body is tightly filled with conductive sponge to prevent electromagnetic leakage; the through hole of the electromagnetic shielding box (M1) is tightly filled with a conductive sponge, the middle part of the conductive sponge is provided with a notch, a first connecting wire harness (M5) is connected with an external wire harness junction box (M2) by penetrating through the notch of the conductive sponge, and the electromagnetic shielding box (M1) enables the interior to form a closed area by filling two conductive sponges.
2. The device for troubleshooting the electromagnetic radiation standard exceeding emission source of the vehicle-mounted system according to the claim 1, characterized in that: the two ends of the wiring harness junction box (M2) are a socket U1 and a socket U2 respectively, the socket U1 and the socket U2 are provided with a plurality of connection ports, and the connection mode of each ship-shaped switch is the same: one end of the ship-shaped switch is connected to one of the connection ports of the socket U1, the other end of the ship-shaped switch is connected to one of the connection ports of the socket U2, and the connection ports of any two ship-shaped switches connected to the socket U1 and the socket U2 are different.
3. The device for troubleshooting the electromagnetic radiation standard exceeding emission source of the vehicle-mounted system according to the claim 1, characterized in that: one end of the connecting wire harness I (M5) connected with the system electric control unit (M3) is of a female end connecting structure, the other end of the connecting wire harness I is of a male end connecting structure, and two ends of the connecting wire harness II (M6) are of male end connecting structures.
4. The device for troubleshooting the electromagnetic radiation standard exceeding emission source of the vehicle-mounted system according to the claim 1, characterized in that: the electromagnetic shielding box (M1) is made of metal materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922086778.XU CN211653016U (en) | 2019-11-28 | 2019-11-28 | Device for checking electromagnetic radiation standard exceeding emission source of vehicle-mounted system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922086778.XU CN211653016U (en) | 2019-11-28 | 2019-11-28 | Device for checking electromagnetic radiation standard exceeding emission source of vehicle-mounted system |
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| Publication Number | Publication Date |
|---|---|
| CN211653016U true CN211653016U (en) | 2020-10-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922086778.XU Expired - Fee Related CN211653016U (en) | 2019-11-28 | 2019-11-28 | Device for checking electromagnetic radiation standard exceeding emission source of vehicle-mounted system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112881845A (en) * | 2021-01-26 | 2021-06-01 | 浙江亚太机电股份有限公司 | Device and method for measuring conduction emission current of ECU signal wire |
-
2019
- 2019-11-28 CN CN201922086778.XU patent/CN211653016U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112881845A (en) * | 2021-01-26 | 2021-06-01 | 浙江亚太机电股份有限公司 | Device and method for measuring conduction emission current of ECU signal wire |
| CN112881845B (en) * | 2021-01-26 | 2022-11-04 | 浙江亚太机电股份有限公司 | Device and method for measuring conduction emission current of ECU signal wire |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201009 Termination date: 20211128 |