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Strong electromagnetic pulse protection device of vehicle electric control system

An electronic control system and protection device technology, applied in the field of electromagnetic pulses, can solve problems such as limited application and inability to meet actual needs, and achieve the effects of avoiding mutual coupling, achieving protection efficiency, and effective protection performance.

Inactive Publication Date: 2020-11-13
CHINA ELECTRONICS TECH CYBER SECURITY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional shielding scheme for the interconnection cables of the vehicle electronic control system not only fails to meet the actual needs in the strong electromagnetic pulse environment, but also has limited application. At present, there is no electromagnetic pulse protection specifically for the transmission channel of the vehicle electronic control system. device

Method used

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  • Strong electromagnetic pulse protection device of vehicle electric control system
  • Strong electromagnetic pulse protection device of vehicle electric control system
  • Strong electromagnetic pulse protection device of vehicle electric control system

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Such as figure 1 As shown, this embodiment provides a strong electromagnetic pulse protection device for a vehicle electronic control system, including mutually isolated power interface protection circuits, engine interface protection circuits and OEM (Original Equipment Manufacturer, original equipment manufacturer) interface protection circuits, The independent setting of the three interface protection circuits can avoid the mutual coupling of strong electromagnetic pulse energy inside the device and achieve more effective protection performance. Each interface protection circuit includes a steady-state filter circuit, a delay circuit and a transient suppression circuit, which are cascaded in different sequences according to actual needs, and are directly connected to the corresponding input and output interfaces after cascading. Inserting a delay circuit between the steady-state filter circuit and the transient suppression circuit can more reliably discharge strong e...

Embodiment 2

[0038] This embodiment is on the basis of embodiment 1:

[0039] A strong electromagnetic pulse protection device for a vehicle electronic control system in this embodiment also includes three metal shielding shells, three input interfaces and three output interfaces, a power interface protection circuit board, an engine interface protection circuit board, and an OEM interface The protective circuit boards are respectively located in the three metal shielding cavities, and are connected with corresponding input interfaces and output interfaces. The use of three metal shielding shells to respectively place the corresponding interface protection circuits can avoid the mutual coupling of strong electromagnetic pulse energy inside the device and achieve more effective protection performance.

[0040] Specifically, the metal shielding shell includes a shell base, a base body and a cover plate, and the base, the base body and the cover plate are fixed by screws and conductive adhesi...

Embodiment 3

[0042] This embodiment is on the basis of embodiment 2:

[0043] The input interface and output interface include aviation connectors with electromagnetic shielding, and are respectively fixed at both ends of the metal shielding shell by screws. The aviation plug with electromagnetic tape shielding can avoid the interface coupling of strong electromagnetic pulses, improve compatibility, and can be connected with shielded cables to achieve the highest level of protection performance.

[0044] As an optimization, the four corners of the power interface protection circuit board, the engine interface protection circuit board and the OEM interface protection circuit board are provided with metalized through holes for grounding and fixing.

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Abstract

The invention relates to the technical field of electromagnetic pulses. The invention discloses a strong electromagnetic pulse protection device of a vehicle electric control system, which comprises apower interface protection circuit, an engine interface protection circuit and an OEM interface protection circuit which are isolated from one another, and the power interface protection circuit comprises a transient suppression circuit, a filter circuit and a delay circuit which are cascaded in sequence; the transient suppression circuit comprises a gas discharge tube and a piezoresistor and isused for discharging and amplifying current; the filter circuit and the delay circuit suppress common-mode interference based on the LC circuit and delay pulse rise time at the same time. According tothe invention, a protection method for cutting off a coupling channel of the strong electromagnetic pulse to the electric control unit interface is adopted, so that the protection efficiency of the strong electromagnetic pulse to the electric control system is maximized, and the damage of nuclear electromagnetic pulse, broadband strong electromagnetic pulse and narrowband strong electromagnetic pulse to the vehicle electric control system can be effectively prevented.

Description

technical field [0001] The invention relates to the technical field of electromagnetic pulses, in particular to a strong electromagnetic pulse protection device for a vehicle electric control system. Background technique [0002] With the development of electromagnetic pulse technology and modern vehicle electronic technology, the electromagnetic safety threats and protection problems faced by vehicles have become increasingly prominent. The strong electromagnetic pulse radiation source directly or indirectly produces electromagnetic effects on the electronic control system of the vehicle engine through directional radiation of high-power pulse energy, causing the electronic system of the vehicle to fail or be damaged, resulting in engine stalling and loss of mobility. At present, the electromagnetic pulse radiation system specially aimed at the vehicle platform has a radiation field strength of hundreds of kV / m, a pulse rise time of ps level, and a repetition frequency of n...

Claims

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Application Information

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IPC IPC(8): H02H9/02H02H9/06H05K9/00H01R13/6581
CPCH01R13/6581H02H9/02H02H9/06H05K9/0007
Inventor 郑浩月马谢何小东吕剑明贺宇张琪
Owner CHINA ELECTRONICS TECH CYBER SECURITY CO LTD
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