CN87209518U

CN87209518U - New type axe and angle photoelectric sensor

Info

Publication number: CN87209518U
Application number: CN 87209518
Authority: CN
Inventors: 林长友
Original assignee: Optical Instrument Factory No1 Changchun City
Current assignee: Optical Instrument Factory No1 Changchun City
Priority date: 1987-06-24
Filing date: 1987-06-24
Publication date: 1988-03-30

Abstract

The utility model discloses a lightweight axe and angle photoelectric sensor, which can manufacture a stable and reliable output electrical pulse signal and has the advantages of small size, simple structure and light weight. The coding disc of the photoelectric sensor is fixed on a rotary shaft witch by a stop ring, a spacer and a binder. The rotary shaft provided with the coding disc is arranged in a bearing of an aluminium alloy bearing seat and is fixed on an inner ring of bearing by a pad and a check ring. The light transmission slits on a slit panel of the utility model have five groups and are arranged according to the rule, and the adopted photoelectric receiver is a flaky phototriode. A casing covers each component and is fixed on the bearing seat to form a regular entirety. The output electrical signal is stable and reliable.

Description

New type axe and angle photoelectric sensor

The invention belongs to the photoelectric sensor that angle, position, angle, angular velocity, angular acceleration is converted to electric impulse signal.

The core of shaft angle photoelectric sensor is a code-wheel, slit plate, rotation axis, bearing seat, bearing, light source, photelectric receiver and electronic circuit thereof.Code-wheel is contained on the rotation axis, and slit plate is that the light tight film on the glass plate matrix is opened some light penetrating slits formations.Slit plate, light source, photelectric receiver and electronic circuit thereof all are fixed on the bearing seat.Slit plate, light source are installed in the corresponding both sides of code-wheel.Photelectric receiver is installed in a side of slit plate, makes it just receive light through code-wheel and slit plate.When the rotation axis band code-wheel and rotated, the light that light source sends passed code-wheel and slit plate regularly and drops on the receiving plane of photelectric receiver, and produces electric current.This electric current is processed into voltage signal through electronic circuit.These voltage signals are inputed to electron oscillograph, on display screen, just demonstrate square wave.Since rotation axis and code-wheel, bearing seat and rotation axis, the fixed form of slit plate, photelectric receiver, selecting for use of bearing, fastening means, the material of each parts are selected and the reason of design shape, make the output signal instability of shaft angle photoelectric sensor, unreliable, and weight is big.

The objective of the invention is to make the shaft angle photoelectric sensor that a kind of stable output signal reliably, correctly reflects position, angle, angular velocity, angle, angular acceleration, and in light weight, easy to assembly.

The present invention realizes like this.The garden cylinder that step and different radii are arranged on the rotation axis.One end of inner hole of bearing seat has step to be used to adorn the T oblique crank Z to hold.The pattern of slit plate is to be made of the light penetrating slit that the opaque film on the rectangular glass is left.Light penetrating slit is arranged in five groups of A, B, C, D, E along short side direction.The center line that A, C are two groups and has the angular distance of (360 °)/(4N) with the B group radius that symmetrical center line overlapped on same radius.The angular breadth of A, B, three groups of light penetrating slits of C is 360/ (2N), and the spacing at light penetrating slit center is (360 °)/(N).The angular breadth of D, two groups of light penetrating slits of E is (360 °)/(N), and each light penetrating slit center line is followed successively by 56,25,17,6,2,0,3,10,24,46 to the angular distance of A, C group switching centre line and multiply by (360 °)/(N).Five groups of light penetrating slits are opened in ring zone, same garden, and its radius is identical with the garden ring radius that the code-wheel light penetrating slit constitutes.And its angular region is 13.1 ° or 11.7 °.The laminar phototriode that photelectric receiver is made by five photochromicss is formed.Electronic circuit is handled five road signals that photelectric receiver produces, and by cable output first, second, third three road rectangle electric signal.Axle N the electric signal of first, second two-way output that whenever circle.Electric signal of the third tunnel output.Code-wheel of the present invention is fixed on the step of rotation axis by stop collar, pad, cementing agent.The T oblique crank Z holds outer pack into the endoporus of bearing seat of aluminium alloy matter of cementing agent of coating.Rotation axis reinstalls in the bearing, and locks the jail with back-up ring, pad.The relative both sides that are contained in code-wheel with slit plate of light source, photelectric receiver is contained in below the slit plate.Cable passes housing and is connected on light source light source and the electronic circuit board.Light source slit plate, photelectric receiver, electronic circuit, housing are fixed on the bearing seat by support, securing member.

The present invention is owing to adopted said structure and fit, and it is easy to assembly to make that the present invention has, the advantage firm, that output signal is reliable and stable, the life-span is long, response frequency is high.

The present invention is stable performance in practicality, and is in light weight, volume is little, response frequency is high.

Concrete structure of the present invention is by following examples and accompanying drawing 1.

Fig. 1 is the sectional view according to shaft angle photoelectric sensor provided by the invention.

The present invention implements like this.

The bearing seat (1) of packing into behind the cementing agent is coated in the outside of bearing (2) outer shroud, rotation axis (4) pack in the bearing (2) and with back-up ring (3) lock jail on the interior ring of bearing (2).Code-wheel (7) is fastened on an end of rotation axis (4) with cementing agent and stop collar (9).Light source (8), slit plate (6) across code-wheel (7) relative fixed on bearing seat (1).Photelectric receiver (5) is fixed on bearing seat (1) near slit plate (6).Electronic circuit (10), housing (11), O-ring seal (13) are fixed on the bearing seat (1) with connecting elements.Cable (12) passes housing (11) and links to each other with electronic circuit (10), light source (8), and its free end is used for signal output.

Annotate: N is natural number in the literary composition.

Accompanying drawing 1, novel shaft angle photoelectric sensor profile.

(1) bearing seat

(2) bearing

(3) back-up ring

(4) rotation axis

(5) photelectric receiver

(6) slit plate

(7) code-wheel

(8) light source

(9) stop collar

(10) electronic circuit

(11) housing

(12) cable

(13) O-ring seal

Claims

1, the photoelectric sensor of forming by bearing seat [1], bearing [2], rotation axis [4], code-wheel [7] light source [8], slit plate [6], photelectric receiver [5], electronic circuit [10], housing [11], cable [12], O-ring seal [13].It is characterized in that:

A, two bearings [2] are T shape,

B, a back-up ring [3] is arranged, a stop collar [9],

C, two T oblique crank Zs hold after [2] outer shroud outside coats the two ends of bearing seat [1] endoporus of packing into behind the cementing agent, again will be with the rotation axis [4] that stop collar [9] cementing agent is being fixed code-wheel [7] bearings [2] of packing into, and lock firm with back-up ring [3].

2, according to the said photoelectric sensor of claim 1, it is characterized in that: photelectric receiver (5) is the Boping sheet photoelectric receiving device that photochromics is made.

3, according to the said photoelectric sensor of claim 1, it is characterized in that: bearing seat (1) is to be made by aluminium alloy, and an end of its endoporus has a step, is used for adorning the T oblique crank Z and holds (2).

4, according to the said photoelectric sensor of claim 1, it is characterized in that: the outside surface of used rotation axis (4) is made up of the cylinder and the corresponding undercut of different-diameter.

5, according to claim 1,2,3,4 said photoelectric sensors, it is characterized in that: used slit plate (6) is Yi Bian be the A of certain angle scope from beginning to leave at the light tight film of rectangle thin glass plate, B, C, D, five groups of light penetrating slits of E, A wherein, C, D, the symmetrical center line that E is four groups is on same radius, and the angular distance of (360 °)/(4N) is arranged with the radius at B group symmetrical center line place, and the light penetrating slit of each group is such, be A, B, the seam width of three groups of light penetrating slits of C is (360 °)/(2N), angular distance is (360 °)/(2N) between seam, D, the seam width of two groups of light penetrating slits of E is (360 °)/(N), and each seam center is to A, the angular distance of the symmetrical center line of C group is respectively 56,25,17,6,2,0,3,10,24,46, multiply by (360 °)/(N).

Above-mentioned various middle N is a natural number.

6, photoelectric sensor according to claim 5 is characterized in that: the light penetrating slit of slit plate (6) is driveed in ring zone, garden, and its radius is identical with the radius of code-wheel (7) light penetrating slit, and the good value of its angular range is 13.1 ° or 11.7 °.