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Three needle tachometer tester

A tachometer and tester technology, applied in the field of aircraft avionics, to achieve the effect of reasonable design, simple connection, and avoiding direct installation

Active Publication Date: 2017-12-12
HARBIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no publicly available test and detection equipment for this three-needle tachometer

Method used

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Experimental program
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Embodiment Construction

[0018] The present invention will be described in detail below in conjunction with the accompanying drawings. The selection of components in the overall design process complies with the GJB546-1996 component quality assurance specification.

[0019] The three-pin tachometer tester includes a power supply circuit, a performance test circuit and a lighting test circuit, wherein,

[0020] In the power supply circuit, the positive end of the DC 28V power supply is connected to one end of the fuse F1 through the single-pole single-throw switch S3, and the other end of the fuse F1 is connected to the positive power end A1 of the first three-pin tachometer connection plug J1 and the second three-pin tachometer connection plug The positive power supply terminal A2 of J2 is connected, the negative terminal of the DC 28V power supply is connected with the first power supply negative terminal D1 of the first three-pin tachometer connection plug J1 and the second power supply negative ter...

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PUM

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Abstract

The invention belongs to the technical field of aircraft avionics, in particular to a three-needle tachometer tester. The three-pin tachometer tester includes a power supply circuit, a performance test circuit and a lighting test circuit. The invention has reasonable design, simple external connection and convenient operation when workers detect the three-needle tachometer. On the one hand, the tester can conduct a comprehensive performance test on the three-needle tachometer, avoiding direct installation of faulty products, thereby improving the efficiency and quality of helicopter assembly, on the other hand, it simplifies the test procedure and improves work efficiency.

Description

technical field [0001] The invention belongs to the technical field of aircraft avionics, in particular to a three-needle tachometer tester. Background technique [0002] Existing twin-engine helicopters generally all can be equipped with a three-needle tachometer. The tachometer has three hands: one long and two short. The long pointer is used to indicate the rotor speed of the helicopter, and the two short pointers "1" and "2" are used to indicate the speed of the two free turbines of the engine. The three-pin tachometer requires input power and two free turbine and rotor speed signals, which are typically sinusoidal signals. The three-needle tachometer is used in the helicopter speed system, and it must be calibrated before installation to ensure its good performance, otherwise it will affect the work of the system. At present, there is no publicly available test and detection equipment for this three-needle tachometer. Contents of the invention [0003] The technic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01P21/02
Inventor 杨俊杰訾鸿刘峰呼飞龙刘欣宁春玲
Owner HARBIN
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