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Self-checking integrated fuel annunciator

A technology of annunciator and fuel oil, applied in the direction of buoy liquid level indicator, etc., can solve the problems of damage and open circuit of the reed switch, and achieve the effect of improving reliability

Inactive Publication Date: 2012-06-27
成都泛华航空仪表电器有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the use of aerospace signalers, the biggest failure mode of the reed switch is the open circuit caused by the damage of the reed switch

Method used

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  • Self-checking integrated fuel annunciator
  • Self-checking integrated fuel annunciator
  • Self-checking integrated fuel annunciator

Examples

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Embodiment Construction

[0013] The present invention will be further illustrated in the following examples, which are only used to illustrate the present invention and not to limit the present invention.

[0014] refer to figure 1 , a kind of self-inspection in one fuel signal device, including: a magnetic float assembly 2 through a magnet to attract a reed switch, and a circuit board 4 and a junction box 5 fixedly connected to a mounting base 3. The magnetic float assembly 2 is assembled in the barrel of the outer body 1 . The reed switch assembly 6 is connected to the circuit board 4 and the junction box 5 through the central assembly hole of the float assembly 2 and the mounting seat 3 . When the fuel signaler is working, the active float assembly 2 changes according to the position of the oil level. When the float reaches a predetermined position with the oil level, the float magnetically makes the reed switch assembly 6 connect to the relay 8 to send out a control signal.

[0015] refer to f...

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Abstract

The invention provides a self-checking integrated fuel annunciator, which comprises a magnetic floater assembly (2), a circuit board (4) and a junction box (5). The circuit board (4) and the junction box (5) are fixedly connected onto a mounting seat (3). A reed switch is a multi-reed-switch assembly, reeds are serially connected to form the multi-reed-switch assembly after being parallelly connected in pairs, and self-checking coils (7) which are respectively electrically connected with a relay (8) and the floater assembly (2) are wound on a column of a reed switch glass sheath (10). The self-checking integrated fuel annunciator solves the problem that reliability of a reed relay is difficult to be improved quickly in the prior art. A parallel-serial connection redundant design mode for the reed relay which is a core component of the fuel annunciator is adopted, and the purpose of quickly improving reliability of the fuel annunciator is achieved. Besides, reliability R of the serial-connection reed switch can reach 0.999988.

Description

technical field [0001] The invention relates to a high-reliability fuel signal device suitable for aviation fuel measurement, more specifically, the invention improves the traditional single reed type signal device into a fuel signal device with high redundancy, high reliability and self-inspection device. Background technique [0002] The aviation fuel annunciator that sends out an alarm signal when the fuel quantity reaches the specified position is a device that uses a single reed type and a float with a magnet to complete the suction of the reed switch. The key component of the signal is the reed switch assembly, and the reliability is guaranteed by its built-in reed switch. The improved reliability of the reed switch means the reliability of the annunciator, and the reliability of the single reed type reed is also the reliability of the annunciator. However, it is difficult to greatly improve the reliability of reed switches and relays. The dry reed switch in the sig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F23/30G01F23/72
Inventor 张红杰
Owner 成都泛华航空仪表电器有限公司
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