Position and speed measuring device based on inductosyn or rotary transformer

A technology of resolver and inductive synchronizer, applied in measurement devices, speed/acceleration/shock measurement, devices using electric/magnetic methods, etc., can solve problems such as signal frequency changes

Inactive Publication Date: 2010-11-10
SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantage is: because the mechanical angle of motion itself is also a time variable, it will cause the signal frequency to change when it rotates, as shown in (2),

Method used

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  • Position and speed measuring device based on inductosyn or rotary transformer
  • Position and speed measuring device based on inductosyn or rotary transformer
  • Position and speed measuring device based on inductosyn or rotary transformer

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Embodiment Construction

[0088] The invention includes an excitation circuit, an induction synchronizer or a rotary transformer, a signal processing circuit, and a central processing unit. The excitation signal is generated by the excitation circuit and power is amplified. After the power signal passes through the induction synchronizer or the rotary transformer, it is filtered by the signal processing circuit, After amplification, phase shifting and shaping, it is sent to the central processing unit, and the processing steps of the program in the central processing unit are:

[0089] 1) Identify the phase information of the signal;

[0090] 2) Determine whether phase correction is necessary. If the system also requires position during dynamic measurement, it is necessary to correct the phase first. The correction formula is derived from equations (5), (10), and (11):

[0091] θ t ′ = θ t ( ...

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Abstract

The invention discloses a position and speed measuring device based on an inductosyn or a rotary transformer. The device adopts a phase discrimination type processing method and comprises an exciting circuit, an inductosyn or a rotary transformer, a signal processing circuit and a central processing unit. An exciting signal is generated by the exciting circuit and subject to power amplification, a power signal passes through the inductosyn or the rotary transformer, the signal processing circuit carries out filtering, amplification, phase shift and reshaping on the power signal, and then the processed signal is sent to the central processing unit. The central processing unit obtains position information through the phase information of a signal, obtains speed information through a position information difference, obtains acceleration information through a speed information difference, and carries out dynamic error correction on phase or speed according to speed and acceleration information. The invention is simple to realize, has low cost and high accuracy, is suitable for both a high-speed operation condition and a low-speed operation condition, and can be applied to the fields of aerospace, military, industry and the like to realize dynamic position and speed measurement.

Description

technical field [0001] The present invention relates to the measurement technology of speed and position, more specifically, the present invention relates to a position and speed measurement device based on induction synchronizer or resolver. Background technique [0002] Inductive synchros and resolvers are both sensors that use electromagnetic principles to convert linear displacement or angular displacement into electrical signals. With a driving circuit, position information can be extracted through the amplitude or phase of the electrical signal. The two sensors have the same working principle. Since the working principle of the inductive synchro and the resolver is designed based on static conditions, no matter whether the measuring device is manufactured according to the amplitude detection method or the phase detection method, there will be dynamic errors in the process of moving or rotating, and even cause Calculation error. [0003] Among them, the method of phase...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01P13/04G01P3/42
Inventor 张育王跃明刘银年王建宇王晟伟庄晓琼
Owner SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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