CN2700829Y - Magnetic-sensing resistance type linear slope angle sensor - Google Patents

Abstract

The utility model relates to a magnetic-sensing resistance type linear slope angle sensor used to measure the slope angle between the measured object and the ground, belonging to the electric element sensor class, and the application range is wide. The utility model consists of an outer housing, a bearing, a rotary shaft, an electronic circuit board, and conducting wires. The utility model is characterized in that: two sensitive elements are connected in series to form a half-bridge circuit structure to be fixed on the outer housing, and a permanent magnet is arranged behind the sensitive elements of the half-bridge structure; the rotary shaft is fixed with a magnet yoke and a gravity pendulum, and is fixed on the outer housing through the bearing; the gravity pendulum drives the magnet yoke, and the locations of the magnet yoke and the sensitive elements are correspondingly changed as the changes of the angle. The utility model has the outstanding characteristics of no contact, no noise, no wear, high sensitivity, small volume, etc.

Description

Mistor molded lines obliquity sensor

Technical field

The utility model relates to a kind of mistor molded lines obliquity sensor, be used to measure the angle of inclination between testee and the earth, belong to electrical equipment sensor class, can be widely used in every field such as weaving, machinery, metallurgy, oil, chemical industry, traffic, aviation, automatic control, military project, steady quality, safe and reliable.

Background technology

Existing inclination angle detection adopts wire wound or conductive plastics formula potentiometer to add that gravity pendulum forms mostly.All has electric contact, rotation by gravity pendulum drives moving back and forth of electric contact, thereby the resistance value output electric signal that changes its electric bridge takes measurement of an angle, there is electric contact in such structure, promptly there are friction and electrical noise, working for a long time or repeatedly to make the contact point wearing and tearing, has influenced reliability and serviceable life greatly.In the frequent occasion of mechanical motion, especially obvious.And the magnetic sensitive of non-contact-point in the past, the structural design of capacitor type obliquity sensor, it is the sinusoidal pattern variation relation that relative area coverage between rotation axis and the sensitive element changes with angle, and the electrical property of output has only about 90 degree and can use by approximately linear in 360 degree angles.

Summary of the invention

Goal of the invention of the present utility model provides a kind of characteristic that promptly possesses the obliquity sensor of no electrical pickoff, can possess the sensor of linear output character again in the scope of taking measurement of an angle.Adopt certain structure, make the relative area coverage of angle of rotation linear with sensitive element.For example: utilize the principle of semiconductor magnetic-sensing resistor effect,, make the area coverage between the anglec of rotation and mistor and the yoke be linear change, then export electric signal and also be linear relationship by the design of magnetic loop.Guaranteeing that resolution is continuous, the advantage that reliability is high and the life-span is long in the scope of measuring the angle of inclination, is output as linearity, thereby has enlarged the application scenario of slant angle sensor simultaneously.

Mistor molded lines obliquity sensor of the present utility model, form by shell, bearing, rotation axis, electronic circuit board and lead, it is characterized in that two sensitive element series connection, form the half-bridge circuit structure and be fixed on the shell, and behind the sensitive element of half-bridge structure, permanent magnet is installed, be fixed with yoke and gravity pendulum on the rotation axis, rotation axis by bearing fixing on shell, along with the variation of angle, gravity pendulum drives yoke, makes that yoke is relative with the position of sensitive element to be changed.When vertical angle changed, the gravity pendulum direction was pointed to the earth's core all the time, at this moment can produce an angle deviating between sensor main body and the gravity pendulum, was exactly the variable quantity of vertical angle.Make the equidistant asymptote yoke on the rotation axis move an angle relative to the area coverage of mistor sheet, and the amount of movement of area and rotational angle are linearization then, the electric signal that changes is linear output, like this, has just finished rotational angle and can export linear in the angular range of measuring.Reach to enlarge and measure the angle of inclination application aims.

Contactless, not have dry sound, no wearing and tearing, high sensitivity, volume be distinguishing feature of the present utility model for a short time.

Description of drawings

Fig. 1 is the utility model structural representation

Embodiment

Below in conjunction with accompanying drawing the utility model is described in further detail

The utility model mistor molded lines obliquity sensor, form by shell 1, bearing 2, rotation axis 3, electronic circuit board 4 and lead 5, two sensitive elements 6 are connected as mistor, forming the half-bridge circuit structure is fixed on the shell 1, and behind the mistor sensitive element 6 of half-bridge structure, permanent magnets 7 are installed, be fixed with spiral etc. on the rotation axis and advance yoke 8 and gravity pendulum 9, rotation axis 3 is fixed on the shell 1 by precision bearing 2, shell 1 generally can be that metal material is made, as aluminium alloy, brass, or ferrous materials.Along with the variation of angle, gravity pendulum 9 drives yokes 8, and yoke 8 is made by the ferrous materials of strong magnetic conduction, makes that yoke 8 is relative with the position of mistor sensitive element 6 to be changed.

The characteristic of mistor sensitive element 6 is to change when the magnetic flux by its area, and marked change can take place its resistance value.Utilize two mistor sensitive element series connection, form half-bridge circuit, making alive just can be converted into voltage signal output to changes in resistance.Be biased permanent magnet 7 in mistor sensitive element 6 back of half-bridge structure again, like this, when the yoke 8 of magnetic conductor is mobile above mistor 6, the position that will make yoke 8 cover mistor 6 areas changes, the position resistance of covering place becomes big, power on as logical, just can make the output voltage of half-bridge corresponding, detect the change in location of yoke with the area position that yoke covers mistor.

Principle of work of the present utility model is: sensor is installed on the testee, its rotation axis 3 parallel the earth surface levels, when gravity pendulum 9 points to the earth's core, when testee rotates, angle of inclination between object and the earth changes, holder part on the shell is connected with article for rotation, and mistor sensitive element 6 is fixing with shell 1, and identical angular turn also takes place.And gravity pendulum 9 points to the earth's core all the time owing to the terrestrial gravitation effect, and rotation axis 3 is by the existence of precision bearing 2, and gravity pendulum 9 is fixed on the rotation axis 3, and yoke 8 also is fixed on the rotation axis 3.Because the drive of gravity pendulum 9 finally make yoke 8 rotate same angle relative to mistor element 6, and the variation of this angle can make the position of the area coverage between yoke and mistor change, thereby the electric signal of output is changed.The further processing of electronic circuit board 4 is passed through in the variation of this electric signal, can export with angle to change corresponding standard electric signal.Because yoke has adopted equidistant spiral asymptote, make the rotation of angle and the area coverage position between yoke and the mistor be linear change, also make the variation of angle of inclination in measurement range, the sensor of present embodiment can linear output electric signal.Thereby finished the course of work of the present invention.

Claims (3)

1. mistor molded lines obliquity sensor, form by shell, bearing, rotation axis, electronic circuit board and lead, it is characterized in that two sensitive element series connection, form the half-bridge circuit structure and be fixed on the shell, and behind the sensitive element of half-bridge structure, permanent magnet is installed, be fixed with yoke and gravity pendulum on the rotation axis, rotation axis by bearing fixing on shell, along with the variation of angle, gravity pendulum drives yoke, makes that yoke is relative with the position of sensitive element to be changed.

2. mistor molded lines obliquity sensor as claimed in claim 1 is characterized in that yoke fixing on its rotation axis adopts equidistant spiral asymptote, makes the rotation of angle and the area coverage between yoke and mistor be linear change.

3. mistor molded lines obliquity sensor as claimed in claim 1 is characterized in that its sensitive element adopts mistor, and magnetic structure adopts biasing permanent magnet and yoke.