CN2775610Y

CN2775610Y - Angular transducer

Info

Publication number: CN2775610Y
Application number: CN 200520050392
Authority: CN
Inventors: 尹圣岚; 廖湘平
Original assignee: RUIXING STAGE ACOUSTIC LIGHT EQUIPMENT FACTORY CHANGSHA
Current assignee: RUIXING STAGE ACOUSTIC LIGHT EQUIPMENT FACTORY CHANGSHA
Priority date: 2005-03-04
Filing date: 2005-03-04
Publication date: 2006-04-26
Anticipated expiration: 2015-03-04

Abstract

The utility model discloses an angle sensor, which is composed of a multi-polar magnetic ring arranged on a rotating shaft and two Hall sensors which are arranged in a magnetic field induction region in a staggered installation mode. Compared with the traditional raster type angle sensor, the utility model has the advantages of low cost, high precision, stable performance, dust interference resistance, etc. The utility model can be used for precise measurement of bidirectional angle displacement, angle speed, angle acceleration, etc.

Description

Angular transducer

Technical field

The utility model relates to a kind of angular transducer.

Background technology

Angular transducer is an application sensor very widely, as long as need carry out the control of position or speed to the object that rotates, just needs angular transducer.Grating encoder is exactly a kind of angular transducer commonly used, and its measuring accuracy and resolution are higher, but its cost is also higher, is subject to the dust influence simultaneously, causes the life-span significantly to descend.

Summary of the invention

The purpose of this utility model provides a kind of simple in structure, angular transducer that precision is high, reliable and stable, to overcome existing raster pattern angular transducer cost height, to be subject to the shortcoming that dust disturbs.

For realizing above-mentioned purpose, the technical solution of the utility model is: form by being installed in the multi-pole magnet-ring in the rotating shaft and being arranged in the magnetic field induction district two Hall elements of arranged in dislocation.

In the above-mentioned angular transducer, two Hall elements of described arranged in dislocation are that induction zone misplaces in the same way side by side.

In the above-mentioned angular transducer, two Hall elements of described arranged in dislocation are that induction zone is arranged relatively.

In the above-mentioned angular transducer, the gap of two Hall elements of described arranged in dislocation is less than the multi-pole magnet-ring magnet pole widths.

Advantage of the present utility model: the utility model is compared advantages such as having cost is low, precision is high, stable performance, anti-dust interference with traditional raster pattern angular transducer.Can be widely used in needs and accurately measure occasions such as two-way angular displacement, angular velocity, angular acceleration.As: numerically-controlled machine, engineering machinery, automobile, computer mouse, ammeter, paper money counter, Long-distance Control automatic gun etc., the especially occasion that accurate observing and controlling is carried out in rotation to motor.

Description of drawings

Fig. 1 is a structural drawing of the present utility model.

Fig. 2 is the structural drawing of Hall element in the utility model.

Fig. 3 is the connection layout of two Hall elements in the utility model.

The output waveform of Hall element when Fig. 4 is at the uniform velocity just changeing for motor.

The output waveform of Hall element when Fig. 5 at the uniform velocity reverses for motor.

Fig. 6 is two synoptic diagram that Hall element is installed side by side in the utility model.

Fig. 7 is that two Hall elements are arranged the synoptic diagram of installing in the utility model.

Fig. 8 the utility model is as the circuit theory diagrams of angular displacement rotary encoder.

Fig. 9 the utility model is as the circuit theory diagrams of angular displacement rotary encoder.

Embodiment

Referring to Fig. 1, be set with multi-pole magnet-ring 3 in the rotating shaft 2 of motor 1, the circle of multi-pole magnet-ring 3 is leant on the shape surface and is provided with several arctic 4, the South Pole 5 that is spacedly distributed, and misplacing in the same way in the magnetic induction district of multi-pole magnet-ring 3 is equipped with Hall element 6,7 side by side, and Hall element 6,7 is fixed on the circuit board.

During work, motor 1 or other gearing drive rotating shaft 2 rotations, the magnetic field that the multi-pole magnet-ring 3 of rotating shaft 2 changes, the variation of Hall element 6,7 induced field intensity, output voltage pulse after amplifying shaping.Because two Hall elements are arranged in dislocation spatially, during near rotary pole, it is poor with regard to life period that two Hall elements are sensed changes of magnetic field, between two output voltage pulses with regard to life period poor (being phase differential), leading or hysteresis according to phase place can be differentiated sense of rotation, and a paired pulses counting number just can obtain angular displacement, angular velocity, acceleration etc. in the unit interval.

Referring to Fig. 2, the structural drawing of Fig. 2 Hall element, 8 is Hall elements among the figure, and 9 is the induction zone of Hall element, and 10 is pin.Fig. 3 is the connection layout of two Hall elements ,+5V power supply, A, the output of B two-way transducing signal.

Fig. 4, Fig. 5 are the dual mode of Hall element arranged in dislocation in the utility model.Fig. 4 is the synoptic diagram that two Hall elements are installed in the same way side by side, and two elements are towards identical, overlapping being installed together, but small deviation is arranged on the position.Fig. 5 is that the synoptic diagram of installation is arranged in two Hall element senses relatively, and two element arrangements are installed, towards on the contrary, and the middle minim gap that keeps, gap length is advisable to face the north and south magnet pole widths mutually less than multi-pole magnet-ring.

Fig. 6, Fig. 7 are the output waveforms of motor Hall element when at the uniform velocity rotating, the output waveform of Fig. 6 Hall element when just changeing, the output waveform of Hall element when Fig. 7 is counter-rotating.

The utility model combines with intelligent microprocessor, just can obtain various rotary encoders, information such as absolute or relative angle (line) displacement of output, angle (line) speed, angle (line) acceleration.The angular displacement rotary encoder circuit theory diagrams of Fig. 8 after micro controller is handled.Fig. 9 be through micro controller handle after the differential bus teletransmission to the rotary encoder circuit theory diagrams of control center.

Claims

1, a kind of angular transducer is characterized in that: be contained in the multi-pole magnet-ring in the rotating shaft and be arranged in the magnetic field induction district two Hall elements of arranged in dislocation by one and form.

2, angular transducer according to claim 1 is characterized in that: two Hall elements of described arranged in dislocation are that induction zone misplaces in the same way side by side.

3, angular transducer according to claim 1, a kind of angular transducer is characterized in that: two Hall elements of described arranged in dislocation are that induction zone is arranged relatively.

4, angular transducer according to claim 3 is characterized in that: the gap of two Hall elements of described arranged in dislocation is less than the multi-pole magnet-ring magnet pole widths.

5, angular transducer according to claim 1 is characterized in that: described multi-pole magnet-ring is leant on the shape surface for circle and is provided with several north and south magnetic poles that are spacedly distributed.