CN214412684U - Anti-electromagnetic interference filter for airborne height sensor - Google Patents
Anti-electromagnetic interference filter for airborne height sensor Download PDFInfo
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Abstract
The utility model discloses an anti-electromagnetic interference filter for airborne height sensor, to GJB151B-2013 among "military equipment and subsystem electromagnetic emission and sensitive requirement", RS103, CS114, CS115, CS116 test project requirement, differential mode rejection network has been designed, common mode rejection network, a dozen of hertz that is used for filtering CS114 experiment requirement is to between several hundred megahertz, the differential mode interference signal of lower frequency, filtering CS115, several hundred kilohertz that CS116 experiment required reach several hundred megahertz's common mode interference signal, the frequency range that filtering RS103 experiment required extends to 18GHz common mode interference signal, and simultaneously, differential mode rejection network, common mode rejection network arranges cylindrical cavity in, have integrate, it is miniaturized, the reliability is high, characteristics such as filtering performance is outstanding.
Description
Technical Field
The utility model belongs to the technical field of machine carries altitude sensor, more specifically say, relate to an anti-electromagnetic interference filter for machine carries altitude sensor.
Background
With the continuous development of military and scientific and technological levels in China, in order to improve the use capacity of the airborne height sensor in a complex electromagnetic environment, the anti-electromagnetic interference efficiency of the airborne height sensor is more and more emphasized on a military platform.
In the prior art, due to the particularity of small current signals of the airborne height sensor, the addition of an external filter device easily affects signal communication and transmission, and the RS103, CS114, CS115 and CS116 test items in GJB151B-2013 electromagnetic emission and sensitivity requirements of military equipment and subsystems cannot be met without the addition of the filter device.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's not enough, provide an anti-electromagnetic interference filter for airborne height sensor, realize the suppression to outside complicated electromagnetic interference, satisfy in GJB151B-2013 "military equipment and subsystem electromagnetic emission and sensitive requirement" RS103, CS114, CS115, CS116 test project requirement, and have integrate, characteristics such as miniaturized, reliability height, filtering capability are outstanding.
In order to realize the above object of the present invention, the utility model is used for machine carries altitude sensor's anti-electromagnetic interference filter, a serial communication port, include:
the differential mode suppression network consists of a differential mode capacitor CX1, a differential mode inductor L1 and a differential mode inductor L2;
the common mode rejection network consists of a common mode inductor L3, a common mode capacitor CY1 and a common mode capacitor CY2, wherein the common mode capacitor CY1 and the common mode capacitor CY2 are high-frequency filter devices;
the positive line of the power supply of the airborne altitude sensor is sequentially connected with one pole of a differential mode inductor L1 and a common mode inductor L3 in series, and then the positive line is output to the positive input end of the power supply of the airborne altitude sensor through a lead;
the negative line of the power supply of the airborne height sensor is connected with the other pole of the differential mode inductor L2 and the common mode inductor L3 in series, and then the negative line of the power supply of the airborne height sensor is output to the negative input end of the power supply of the airborne height sensor through a lead;
the differential mode capacitor CX1 is connected in parallel with the rear ends of the differential mode inductors L1 and L2, one end of the common mode capacitor CY1 is connected with the front end of one pole of the common mode inductor L3, one end of the common mode capacitor CY1 is connected with the shell, one end of the common mode capacitor CY2 is connected with the front end of the other pole of the common mode inductor L3, and the other end of the common mode capacitor CY2 is connected with the shell;
the differential mode inductor L1, the differential mode inductor L2 and the differential mode capacitor CX1 in the differential mode suppression network suppress differential mode interference signals with lower frequency between dozens of hertz and hundreds of megahertz, the common mode inductor L3 in the common mode suppression network is used for suppressing the common mode interference signals between hundreds of kilohertz and hundreds of megahertz, and the common mode capacitor CY1 and the common mode capacitor CY2 in the common mode suppression network are used for suppressing the common mode interference signals with frequency range extending to 18 GHz;
one end face of the cylindrical cavity is provided with a circular connector for connecting a positive wire Pi and a negative wire Ni of a power supply of the airborne height sensor, and the other end face of the cylindrical cavity is output through a lead; the differential mode rejection network and the common mode rejection network are arranged in the cylindrical cavity.
The purpose of the utility model is realized like this.
The utility model discloses an anti-electromagnetic interference filter for airborne height sensor, to GJB151B-2013 among "military equipment and subsystem electromagnetic emission and sensitive requirement", RS103, CS114, CS115, CS116 test project requirement, differential mode rejection network has been designed, common mode rejection network, be used for between dozen of hertz that filtering CS114 experiment required to several hundred megahertz, the differential mode interference signal of lower frequency, filtering CS115, several hundred kilohertz that CS116 experiment required to several hundred megahertz's common mode interference signal, the frequency range that filtering RS103 experiment required extends to 18GHz common mode interference signal, and simultaneously, differential mode rejection network, common mode rejection network arranges cylindrical cavity in, have integrate, small-size, the reliability is high, characteristics such as filtering capability is outstanding.
Drawings
FIG. 1 is a schematic circuit diagram of one embodiment of an anti-EMI filter for an airborne height sensor according to the present invention;
fig. 2 is an external schematic diagram of a specific embodiment of the anti-electromagnetic interference filter for an airborne height sensor according to the present invention, wherein (a) is an output end face, (b) is a side face, and (c) is an input end face.
Detailed Description
The following description of the embodiments of the present invention is provided in order to better understand the present invention for those skilled in the art with reference to the accompanying drawings. It is to be expressly noted that in the following description, a detailed description of known functions and designs will be omitted when it may obscure the subject matter of the present invention.
Fig. 1 is a schematic diagram of the circuit principle of a specific mode of the anti-electromagnetic interference filter for the airborne height sensor of the present invention.
In this embodiment, as shown in fig. 1, the anti-electromagnetic interference filter for airborne height sensor of the present invention includes two parts, namely a differential mode rejection network 1 and a common mode rejection network 2.
The differential mode suppression network consists of a differential mode capacitor CX1, a differential mode inductor L1 and a differential mode inductor L2; the common mode rejection network is composed of a common mode inductor L3, a common mode capacitor CY1 and a common mode capacitor CY2, wherein the common mode capacitor CY1 and the common mode capacitor CY2 are high-frequency filter devices.
The positive line Pi of the power supply of the airborne altitude sensor is sequentially connected with one pole of a differential mode inductor L1 and one pole of a common mode inductor L3 in series, and then the lead outputs (an output end Po) to the positive input end of the power supply of the airborne altitude sensor; the negative power line Ni of the airborne height sensor is connected in series with the other pole of the differential mode inductor L2 and the common mode inductor L3, and then the wire is output (output end No) to the negative input end of the airborne height sensor power.
The differential mode capacitor CX1 is connected in parallel to the rear ends of the differential mode inductors L1 and L2, one end of the common mode capacitor CY1 is connected to the front end of one pole of the common mode inductor L3, one end of the common mode capacitor CY1 is connected to the housing, one end of the common mode capacitor CY2 is connected to the front end of the other pole of the common mode inductor L3, and the other end of the common mode capacitor CY2 is connected to the housing, namely the ground end.
The differential mode suppression network mainly aims at CS114 test items, and is used for suppressing the differential mode interference signals with lower frequencies between dozens of hertz and hundreds of megahertz; the common-mode inductor L3 in the common-mode rejection network mainly aims at CS115 and CS116 test items and is used for rejecting common-mode interference signals from hundreds of kilohertz to hundreds of megahertz; the common-mode capacitor CY1 and the common-mode capacitor CY in the common-mode rejection network are mainly used for RS103 test items and are used for rejecting common-mode interference signals with the frequency range extending to 18 GHz.
As shown in fig. 2, the present invention further includes a cylindrical cavity, wherein a circular connector is installed on one end surface of the cylindrical cavity for connecting a positive wire Pi and a negative wire Ni (in this embodiment, there are 6 jacks, and any two jacks are selected as inputs to be connected to an internal circuit) of the airborne height sensor power supply, and the other end surface is output through a wire (output ends are Po and No); the differential mode rejection network and the common mode rejection network are arranged in the cylindrical cavity.
Although illustrative embodiments of the invention have been described above to facilitate the understanding of the invention by those skilled in the art, it is to be understood that the invention is not limited in scope to the embodiments, and that various changes may be apparent to those skilled in the art without departing from the spirit and scope of the invention as defined and defined in the appended claims.
Claims (1)
1. An anti-electromagnetic interference filter for an airborne height sensor, comprising:
the differential mode suppression network consists of a differential mode capacitor CX1, a differential mode inductor L1 and a differential mode inductor L2;
the common mode rejection network consists of a common mode inductor L3, a common mode capacitor CY1 and a common mode capacitor CY2, wherein the common mode capacitor CY1 and the common mode capacitor CY2 are high-frequency filter devices;
the positive line of the power supply of the airborne altitude sensor is sequentially connected with one pole of a differential mode inductor L1 and a common mode inductor L3 in series, and then the positive line is output to the positive input end of the power supply of the airborne altitude sensor through a lead;
the negative line of the power supply of the airborne height sensor is connected with the other pole of the differential mode inductor L2 and the common mode inductor L3 in series, and then the negative line of the power supply of the airborne height sensor is output to the negative input end of the power supply of the airborne height sensor through a lead;
the differential mode capacitor CX1 is connected in parallel with the rear ends of the differential mode inductors L1 and L2, one end of the common mode capacitor CY1 is connected with the front end of one pole of the common mode inductor L3, one end of the common mode capacitor CY1 is connected with the shell, one end of the common mode capacitor CY2 is connected with the front end of the other pole of the common mode inductor L3, and the other end of the common mode capacitor CY2 is connected with the shell;
the differential mode inductor L1, the differential mode inductor L2 and the differential mode capacitor CX1 in the differential mode suppression network suppress differential mode interference signals with lower frequency between dozens of hertz and hundreds of megahertz, the common mode inductor L3 in the common mode suppression network is used for suppressing the common mode interference signals between hundreds of kilohertz and hundreds of megahertz, and the common mode capacitor CY1 and the common mode capacitor CY2 in the common mode suppression network are used for suppressing the common mode interference signals with frequency range extending to 18 GHz;
one end face of the cylindrical cavity is provided with a circular connector for connecting a positive wire Pi and a negative wire Ni of a power supply of the airborne height sensor, and the other end face of the cylindrical cavity is output through a lead; the differential mode rejection network and the common mode rejection network are arranged in the cylindrical cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202120782687.4U CN214412684U (en) | 2021-04-16 | 2021-04-16 | Anti-electromagnetic interference filter for airborne height sensor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120782687.4U CN214412684U (en) | 2021-04-16 | 2021-04-16 | Anti-electromagnetic interference filter for airborne height sensor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117849439A (en) * | 2024-03-08 | 2024-04-09 | 成都新欣神风电子科技有限公司 | Magnetic balance type current sensor |
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2021
- 2021-04-16 CN CN202120782687.4U patent/CN214412684U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117849439A (en) * | 2024-03-08 | 2024-04-09 | 成都新欣神风电子科技有限公司 | Magnetic balance type current sensor |
| CN117849439B (en) * | 2024-03-08 | 2024-06-07 | 成都新欣神风电子科技有限公司 | Magnetic balance type current sensor |
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