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Magnetic induction rotation speed measuring device

A speed measurement and magnetic induction technology, applied in the field of electronics, can solve problems such as structure acquisition, and achieve the effects of simple cost, simple structure and easy modification

Active Publication Date: 2014-07-16
广东海伦宝家用电器有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem in the prior art that products such as motors that need to monitor the rotational speed cannot obtain their rotational speed with a simple structure, the embodiment of the present invention proposes a magnetic induction rotational speed measurement device

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Such as figure 1 As shown, the magnetic induction rotational speed measuring device of the embodiment of the present invention includes: a magnetic body 1 fixed on a rotating body; and a magnetic induction mechanism 2 for detecting the rotational speed of the magnetic body.

[0028] The embodiment of the present invention can adopt a simple structure to realize the speed measurement of the rotating object, that is, through the magnetic body fixed on the rotating object, the magnetic induction mechanism that has been used to sense the magnetic body monitors the rotating speed of the rotating object. This structure is not only low in cost, easy to implement, but also easy to improve on existing products.

Embodiment 2

[0030] Furthermore, on the basis of Embodiment 1, this application provides a specific implementation manner. Of course, this implementation is only for the purpose of illustration, rather than limiting the general concept of the present application. Those skilled in the art can understand that any implementation method under the general concept of the application, even if it is not included in the application, should also be within the protection scope of the application.

[0031] Specifically, such as figure 2 The magnetic induction mechanism in Embodiment 1 includes: a magnetic induction detection coil 21 fixed on the rotating object side to detect the rotational speed of the magnetic body, a pulse current output that outputs current when the magnetic induction detection coil 21 detects a magnetic body Circuit 22, a pulse detection delay circuit 24 for determining the rotational speed of the rotating object according to the output current of the pulse current output circu...

Embodiment 3

[0037] Such as image 3 As shown, on the basis of Embodiment 1 and Embodiment 2, the present application provides a specific circuit diagram for realizing the general idea of ​​the present application. Certainly, the circuit diagram is only for the purpose of illustration, rather than limiting the general concept of the present application. Those skilled in the art can understand that any circuit structure under the general concept of the present application, even if it is not included in the present application, should also be within the protection scope of the present application.

[0038] Such as image 3 As shown, the magnetic body DT can be a permanent magnet.

[0039] The pulse current amplifying circuit includes: positive voltage VDD, negative voltage VSS, first resistor R1, second resistor R2, third resistor R3, first diode D1, first capacitor C1, second capacitor C2, first Transistor VT1;

[0040] The positive voltage VDD is connected to the anode of the first dio...

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Abstract

The invention provides a magnetic induction rotation speed measuring device, which comprises a magnet and a magnetic induction mechanism. The magnet is fixed onto a rotating article, and the magnetic induction mechanism is used for detecting the rotation speed of the magnet. In an embodiment of the invention, rotation speeds of rotating articles such as a motor shaft and the like can be monitored by the magnetic induction rotation speed measuring device with a simple structure, and damage to the articles such as the motor shaft and the like caused by abnormal rotation speeds can be prevented. In addition, the magnetic induction rotation speed measuring device is low in cost and reasonable in structure, and an existing product can be easily modified. Furthermore, the magnetic induction rotation speed measuring device is also applicable to elevators, motor vehicles, rotating mechanical equipment, conveying equipment, other household appliances, numerical control equipment, ships, aviation equipment, aviation airplanes, military equipment and the like.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to a magnetic induction rotational speed measuring device. Background technique [0002] With the improvement of people's living standards, more and more electronic products have entered the family. Electric motors (motors) are used in many existing electronic products, including air conditioners, refrigerators, and electric fans. Existing motors all have a motor shaft as a power output part, and the motor shaft can exist independently, or some auxiliary components, such as fan blades, can be arranged on the motor shaft. The motors of existing electronic products are not equipped with speed measuring devices, so the running state of the motors cannot be monitored. When the motor shaft rotates too slowly or stops due to reasons such as excessive load, the motor cannot be powered off automatically, which can easily cause the motor to burn out. [0003] Similarly, this phenomeno...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01P3/481
Inventor 谢永光
Owner 广东海伦宝家用电器有限公司
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