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Return-to-zero controlling method of meter hands and device therefor

A technology of instrument pointers and control methods, which is applied to measuring devices, instruments, moving iron musical instruments, etc., and can solve problems such as improvement and high manufacturing costs

Inactive Publication Date: 2012-05-23
林玲朱
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method can improve the linearity, but for the pointer of the meter, an additional set of coils must be wound, which not only requires more manufacturing costs, but also increases the overall volume and weight of the pointer of the meter, which is not optimal. the solution

Method used

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  • Return-to-zero controlling method of meter hands and device therefor
  • Return-to-zero controlling method of meter hands and device therefor
  • Return-to-zero controlling method of meter hands and device therefor

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Experimental program
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Effect test

Embodiment Construction

[0046] Please refer to figure 1 As shown, the zero return control method of the present invention cancels the magnetic field generated by the zero return magnet 57 by establishing another magnetically opposite compensation magnetic field, which can be established by a compensation voltage 10 . The strength of the compensation voltage 10 can be determined through the following steps:

[0047] 1. Apply an adjustable DC voltage to the driver 55a of the cosine coil 53 .

[0048]2. Leave the driver 56a of the sinusoidal coil 54 open, because the return-to-zero magnetic field has no effect on the direction of the sinusoidal coil 54 .

[0049] 3. Move the pointer 52 away from the original position at an angle of 0 degrees, for example, move the pointer 52 to a position at an angle of 90 degrees.

[0050] 4. Gradually fine-tune the strength of the DC voltage so that the pointer 52 will not return to the position at an angle of 0 degrees even after removing the external driving forc...

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Abstract

The invention relates to a return-to-zero controlling method of meter hands and a device therefor, determines a compensating voltage to be applied directly to the cosine coil or the sine coil or both according to a meter hand group which comprises a return-to-zero magnet, a cosine coil, a sine coil and a pointer and the polarity of a return-to-zero magnetic field which is built by the return-to-zero magnet, and leads the compensating voltage to build a compensating magnetic field so as to counteract the return-to-zero magnetic field, thus leading the pointer to keep good linearity and not to be influenced by the return-to-zero magnet when operated on the premise of unchanging the structure of the meter hand group.

Description

technical field [0001] The present invention relates to a control method and device for instrument pointer zeroing, in particular to an instrument pointer zeroing device that allows a good linear relationship between the deflection angle of the pointer and the strength of the applied voltage by applying a compensation voltage . Background technique [0002] Please refer to Figure 7 , Figure 7 Shown is a schematic structural diagram of a traditional air-core instrument pointer group, the main structure includes a rotor 51 with a permanent magnet, a pointer 52 on the rotor 51, and two sets of coils (Cosine coil) ( Sine coils) 53, 54. The two coils 53, 54 are wound in a 90-degree orthogonal manner relative to each other. For the sake of distinction, the two coils are referred to as the cosine coil 53 and the sine coil 54 respectively hereinafter. Once a voltage is applied to the coils 53 and 54 , the two coils 53 and 54 will interact with the permanent magnet on the rotor 51...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R5/16G01R7/06
Inventor 林玲朱
Owner 林玲朱