CN2620245Y

CN2620245Y - Angle sensor

Info

Publication number: CN2620245Y
Application number: CN 02295651
Authority: CN
Inventors: 苏建平
Original assignee: SHANGHAI HITECH SYSTEM WORKS CO Ltd
Current assignee: SHANGHAI HITECH SYSTEM WORKS CO Ltd
Priority date: 2002-12-31
Filing date: 2002-12-31
Publication date: 2004-06-09
Anticipated expiration: 2012-12-31

Abstract

Disclosed is an angle sensor which includes: a shell; at least one photoelectric transducer fixed arranged relative to the shell; a light incident face being at right angles to the photoelectric transducer and a shaft fixed arranged relative to the shell; a grating sheet with one side face relative to the photoelectric transducer and arranged circling the shaft and a light-through part provided on a rotating part of the grating sheet relative to the photoelectric transducer which alters the clear light size along the rotating direction of the grating sheet, and the outer peripheral side of the grating sheet is arranged with a heavy hammer; and at least one light transmitter fixed arranged relative to the shell and corresponding to the photoelectric transducer keeping apart with the grating at the outside of the other side face of the grating sheet. The angle sensor has advantages of long service life, corrosion resistance and high precision.

Description

Angular transducer

Technical field

The utility model relates to angular transducer, is specifically related to contactless photo-electric angle sensor.

Background technology

Traditional angular transducer is a potentiometric transducer, and it is a kind of contact type angle sensor, because potentiometer has the contact, so its anti-wear performance is poor, poor contact of contacts often occurs, thereby failure rate height, life-span are short, adjust loaded down with trivial details when in addition, being used for measurement of angle.

Summary of the invention

The utility model is in order to address the above problem, and its purpose is to provide a kind of photo-electric contactless angular transducer.

Angular transducer of the present utility model comprises: shell; Hard-wired at least one photoelectric transformer of described relatively shell; Perpendicular to the hard-wired axle of sensitive surface, the opposite shell of described photoelectric transformer; One side and described photoelectric transformer relative to, rotates the lenticular lenses of installing around described axle, be provided with the logical light part of clear light size variation in rotational direction with described photoelectric transformer this lenticular lenses vis-a-vis, this lenticular lenses following peripheral disposes weight; With relative with described photoelectric transformer outside the another side of described lenticular lenses, across described grating and with respect to hard-wired at least one optical transmitting set of described shell.

This angular transducer also comprises bearing, and described lenticular lenses has central through hole, and the outer shaft of described bearing is fixed in the described central through hole, and an end of described axle and the internal axle sleeve of described bearing are fixed.

This angular transducer also comprises bearing, and the core of described lenticular lenses and the outer shaft of described bearing are fixed, and the end of an end of described axle is fixed in the internal axle sleeve of described bearing.

Described photoelectric transformer is a photoelectric cell.

Described optical transmitting set is a light emitting diode.

The other end of described axle is fixed on the shell.

Described logical light partly is that its aperture is along the linear light penetrating slit that increases or reduce of lenticular lenses rotation direction.

Described light penetrating slit is distributed on the semicircle.

Described light penetrating slit rotational symmetry up and down is distributed on the whole circle.

Described photoelectric cell is 2 photoelectric cells relative with described light penetrating slit, that its projection on grating distributes by the grating center line up and down.

Described light emitting diode is 2 light emitting diodes relative with described photoelectric cell, that its projection on grating distributes by the grating center line up and down.

According to angular transducer of the present utility model, have easy to adjust, long service life and erosion-resisting advantage.

Below in conjunction with accompanying drawing preferred embodiment of the present utility model is described in detail.

Description of drawings

Fig. 1 illustrates the structure principle chart of the utility model one embodiment angular transducer;

Fig. 2 illustrates the routine structure principle chart of another variation that grating, bearing and axle are connected;

Fig. 3 illustrates the front elevation of grating one example structure;

Fig. 4 illustrates the front elevation of another example structure of optical grating construction.

Implement preferred mode of the present invention

Referring to Fig. 1, Fig. 1 illustrates the structure principle chart of contactless photo-electric angle sensor one embodiment of the utility model.In this embodiment, angular transducer comprises: shell 1; Opposite shell 1 hard-wired two

photoelectric transformer

21,22 though photoelectric transformer has adopted photoelectric cell in this embodiment, also can adopt as phototriode or photoresistance in other embodiments as

photoelectric transformer

21,22; Axle 3, it is perpendicular to the

sensitive surface

211 and 222 of described

photoelectric transformer

21,22, opposite shell 1 fixed installation, though axle is fixedly mounted in the wall of shell 1 both sides in this embodiment, also can be installed on the printed panel with shell 1 secure bond (not shown); One side 41 and

photoelectric transformer

21,22 relative to, rotate the lenticular lenses 4 of installing around axle 3, this lenticular lenses 4 and

photoelectric transformer

21,22 vis-a-vis rotating parts are provided with the logical light part 5 (concrete structure is referring to Fig. 3) that changes along lenticular lenses 4 rotation direction clear light sizes, dispose weight 7 on the neighboring of lenticular lenses 4; With outside the another side 42 of lenticular lenses 4, with

photoelectric transformer

21,22 relatively and with respect to shell 1 hard-wired two

optical transmitting sets

61,62, in the present embodiment, optical transmitting

set

61,62 adopts light emitting diode, but also can adopt other optical transmitting set, for example

miniature bulb

61,62.

In the above among the embodiment, photoelectric transformer 21 though 22 be installed on the shell 1 one side inwalls, also can be installed on the printed panel with shell 1 or axle 3 secure bond (not shown).

In the above among the embodiment, optical transmitting set 61 though 62 be installed on the opposite side inwall of shell 1, also can be installed on the support with shell 1 or axle 3 secure bond (not shown).

Lenticular lenses 4 is installed the simplest mode with the rotation of axle 3, opens the through hole (not shown) that diameter ratio shaft 3 external diameters are big slightly always at the center of lenticular lenses 4, and lenticular lenses 4 is penetrated axle 3 by this through hole, and realization lenticular lenses 4 is rotated around axle 3 and installed.Another way (not shown) is, with its outer shaft and the fixed installation of lenticular lenses 4 central through hole inwalls, with internal axle sleeve and axle 3 fixed installations of passing through this internal axle sleeve, realizes that lenticular lenses 4 rotates installations around axle 3 with bearing.A mode is referring to another embodiment of Fig. 2 again, and with the outer shaft and lenticular lenses 4 cores (but this core can not opened the hole) fixed installation of bearing 8, the end of an end of axle 3 is fixedly mounted in the internal axle sleeve of bearing 8, realizes that lenticular lenses 4 is around axle 3 rotation installations.

The outside that the other end of axle 3 stretches out shell 3 is in but this axle 3 also can not stretch out shell 3 in the shell 3 (not shown), and need open a port (not shown) this moment on the shell wall corresponding with axle 3 other ends, so that measured outer shaft engages with axle 3.

Referring to Fig. 3, Fig. 3 illustrates the front elevation of grating one example structure.Among Fig. 3 and Fig. 1, lenticular lenses 4 and

photoelectric transformer

21,22 and optical transmitting set 61, the logical light that changes along lenticular lenses 4 rotation direction clear light sizes that is provided with on the 62 relative rotating parts partly is light penetrating slit 5, as seen from Figure 3, the aperture of light penetrating slit 5 increases or reduces along the lenticular lenses rotation direction is linear, and the aperture here is defined as the radial distance from a tape edge of light penetrating slit 5 to another tape edge.

In the above among the embodiment, adopt two photoelectric transformer 21 respectively, 22 and two

optical transmitting sets

61,62, light penetrating slit 5 is as shown in Figure 3 at this moment, presenting lower shaft is symmetrically distributed on the whole circle, and two

photoelectric transformer

21,22 and two

optical transmitting sets

61,62 are respectively from grating 4 both sides 41,42 is relative with light penetrating slit 5, and their vertical projections on grating 4 two sides are distribution up and down by the center line of grating 4 respectively.Adopt the benefit of two pairs of photoelectric transformer and optical transmitting set to be to obtain the differential signal of two

photoelectric transformer

21,22, improved the sensitivity of test.The optical transmitting set (as 161) that a photoelectric transformer (as 21) and correspondence also can only be set certainly carries out measurement of angle, and this moment, light penetrating slit 5 only needed a side light penetrating slit of rotational symmetry distribution up and down to get final product, and also, light penetrating slit 5 is distributed on the semicircle.

Among the top embodiment, though light penetrating slit 5 is distributed on semicircle or the whole circle, also can be distributed on the part of semicircle or whole circle, the more top embodiment's of angular range that measure this moment is little.

Lenticular lenses 4 can be with the material of obstructed light, and this moment, logical light partly was opening, also can make of light transmissive material, and this moment, the place outside logical light part applied light tight material.

Referring to Fig. 4, Fig. 4 illustrates the front elevation of another example structure of optical grating construction, and in Fig. 4, the in rotational direction linear a plurality of circular holes that increase or reduce in the aperture of adopting two groups of transverse axis symmetries to distribute up and down come the light penetrating slit 5 of alternate figures 3 embodiment.Also can adopt the circular hole of the equal aperture that two groups of rotational symmetry distribute up and down in addition, at this moment, the measuring-signal of acquisition is a string constant amplitude pulse, and the number of pulse is represented angle value, and this mode has extremely strong antijamming capability, and the processing of signal line is also simpler.Circular hole among Fig. 4 also can use the hole of other shapes such as rectangular opening or grid to go to substitute it.

The principle of work of this angular transducer is as follows, with outer shaft (measured axle) and axle 3 secure bond, when outer shaft rotates (being angular variation), driving axle 3 rotates, the photoelectric transformer 21 that opposite shell 1 and axle 3 are motionless, 22 and optical transmitting set 61,62 also rotate identical angle thereupon, and lenticular lenses 4 keeps the upright position constant under the gravity of weight 7, thereby

photoelectric transformer

21,22 and optical transmitting set 61,62 relative lenticular lenses 4 turn over identical angle, because the received light quantity of

photoelectric transformer

21,22 this moment becomes with the aperture of light penetrating slit 5, thereby the variation that angular transducer can the perception angle.

In conjunction with the accompanying drawings angular transducer of the present utility model is had been described in detail above; according to top description; those skilled in the art can make many variations and modification; therefore; above-described many details should not constitute qualification of the present utility model, and the utility model will be with scope that appended claims was defined as protection domain of the present utility model.

Claims

1. an angular transducer is characterized in that, comprises:

Shell;

Hard-wired at least one photoelectric transformer of described relatively shell;

Perpendicular to the hard-wired axle of sensitive surface, the opposite shell of described photoelectric transformer;

One side and described photoelectric transformer relative to, rotates the lenticular lenses of installation around described axle, be provided with the logical light part that changes along lenticular lenses rotation direction clear light size with the rotating part of described photoelectric transformer this lenticular lenses vis-a-vis, this lenticular lenses neighboring disposes weight; With

Relative with described photoelectric transformer and with respect to hard-wired at least one optical transmitting set of described shell outside the another side of described lenticular lenses, across described grating.

2. angular transducer as claimed in claim 1, it is characterized in that also comprise bearing, described lenticular lenses has central through hole, the outer shaft of described bearing is fixed in the described central through hole, and an end of described axle passes the internal axle sleeve of described central through hole and described bearing and fixes.

3. angular transducer as claimed in claim 1 is characterized in that, also comprises bearing, and the core of described lenticular lenses and the outer shaft of described bearing are fixed, and the end of an end of described axle is fixed in the internal axle sleeve of described bearing.

4. angular transducer as claimed in claim 1 is characterized in that described photoelectric transformer is a photoelectric cell.

5. angular transducer as claimed in claim 1 is characterized in that described optical transmitting set is a light emitting diode.

6. angular transducer as claimed in claim 1 is characterized in that, the outside that the other end of described axle stretches out described shell.

7. as the described angular transducer of the arbitrary claim of claim 1 to 6, it is characterized in that described logical light partly is that its aperture is along the linear light penetrating slit that increases or reduce of lenticular lenses rotation direction.

8. angular transducer as claimed in claim 7 is characterized in that described light penetrating slit is distributed on the semicircle.

9. angular transducer as claimed in claim 7 is characterized in that, described light penetrating slit rotational symmetry up and down is distributed on the whole circle.

10. angular transducer as claimed in claim 7 is characterized in that, described photoelectric cell is 2 photoelectric cells relative with described light penetrating slit, that its projection on grating distributes by the grating center line up and down.

11. angular transducer as claimed in claim 7 is characterized in that, described light emitting diode is 2 light emitting diodes relative with described photoelectric cell, that its projection on grating distributes by the grating center line up and down.