CN201680911U

CN201680911U - Photoelectric sensor

Info

Publication number: CN201680911U
Application number: CN2009202870969U
Authority: CN
Inventors: 邓志才; 许用疆; 王怀舟
Original assignee: SHANGHAI LANBAO SENSOR CO Ltd
Current assignee: Shanghai Lanbao Sensing Technology Co., Ltd.
Priority date: 2009-12-31
Filing date: 2009-12-31
Publication date: 2010-12-22
Anticipated expiration: 2019-12-31

Abstract

The utility model discloses a photoelectric sensor, which comprises a housing, a lens frame and an optical system installed inside the housing, and a circuit board in electric connection with the optical system, and is characterized in that the optical system comprises a projector and a light receptor vertically arranged, a reflector concentric to the center of the projector and the light receptor is arranged between the projector and the light receptor, and a convex lens concentric to the center of the light receptor and the reflector is arranged beside the light receptor and the reflector. By using homogeneous light and making full use of the concentric principle, the photoelectric sensor provided in the utility model, a monochromatic light color code sensor, is adapted to shock and vibration measuring environment and has strong anti-interference capability and high resolving power.

Description

Electro-optical pickoff

Technical field

The utility model relates to a kind of electro-optical pickoff, particularly relates to a kind of monochromatic source electro-optical pickoff that utilizes coaxial principle.

Background technology

Modernization industry is produced because the application scenario is more and more, become increasingly complex, so to more accurate, more the demand of reliable sensors is also increasing, for instance, the identification of color detection and change color etc. is exactly one of wherein comparatively complicated application, to determine that as machine in packing is produced which kind of product is placed in the packing of what color, when the candy wrapping film should cut, how to guarantee toy, its front of perfume bottle or other products is towards viscose paper window of packing box etc., and like this comparatively generally all to adopt with the color sensor be the solution of core to Kun Nan detection task.

At present, the sensor that is used for color identification has two kinds of fundamental types: first color mark sensor, and it uses an incandescent light source or monochromatic LED light source; It two is RGB (RGB) color sensors, and its detects the reflection ratio of target object to three primary colours, thereby differentiates object color.This class device is many to be warm reflection-type, beam type and optical-fiber type, is encapsulated in various metals and the polycarbonate shell.

Color mark sensor is usually used in detecting the spot on specific colour code or the object, and it is to realize that by comparing with non-color scale space colour code detects.Color mark sensor is actual to be a kind of reversing device, light source is installed perpendicular to target object, and receiver and object acutangulate direction and install, and allows its only detect scattered light from target object, thereby avoid sensor directly to receive reflected light, and it is very narrow that light beam is focused on.

Sensor based on incandescent lamp detects color with colored light sources, and this incandescent lamp emission comprises infrared versicolor light, therefore can detect the subtle change of color on wide range with the sensor of this light source.In addition, the testing circuit of incandescent lamp sensor is all very simple usually, therefore the response speed that can obtain to be exceedingly fast.Yet incandescent lamp does not allow vibration and extends working time, and therefore is not suitable for the occasion that serious impact and vibration are arranged.

The utility model content

The purpose of this utility model provides a kind of electro-optical pickoff applicable to the measurement environment that shock and vibration are arranged.

For solving the problems of the technologies described above, electro-optical pickoff of the present utility model comprises shell, is installed in the mirror holder of described enclosure, optical system and the circuit board that is electrically connected with described optical system, it is characterized in that: described optical system comprises into the light projector and the light-receiving device of vertical arrangement, between described light projector and light-receiving device, be equiped with and the coaxial catoptron of described light projector and light-receiving device center, also be provided with and the coaxial convex lens of described light-receiving device and catoptron center in the side of described light-receiving device and catoptron.

As a kind of preferred version of the present utility model, described light projector is a monochromatic source.

As a kind of preferred version of the present utility model, described catoptron is the half-mirror of plated film.

As a kind of preferred version of the present utility model, described half-mirror becomes miter angle with described monochromatic source.

As a kind of preferred version of the present utility model, described half-mirror becomes miter angle with described convex lens.

As a kind of preferred version of the present utility model, the amplifying circuit that described circuit board is provided with the sensitive device circuit that is electrically connected with light-receiving device, link to each other successively with described sensitive device circuit, synchronizing circuit and output circuit vibrate; Wherein, described vibration synchronizing circuit also links to each other with light emitting diode with the current amplification circuit that links to each other successively, and described output circuit also links to each other with power supply by mu balanced circuit.

Technique effect of the present utility model is, uses monochromatic source and utilizes coaxial principle to make electro-optical pickoff go for the measurement environment of shock and vibration, and have stronger antijamming capability and higher resolution.

Description of drawings

Below in conjunction with accompanying drawing and preferred implementation the utility model is described in further detail.

Fig. 1 is the three-dimensional structure diagram of the utility model electro-optical pickoff;

Fig. 2 is the fundamental diagram of the utility model electro-optical pickoff; And

Fig. 3 is the circuit block diagram of the utility model electro-optical pickoff.

Embodiment

As depicted in figs. 1 and 2, electro-optical pickoff of the present utility model comprises shell 1, is installed in the mirror holder and the optical system of described enclosure.Described optical system comprises into the light projector of vertical arrangement, be LED monochromatic source 30 and light-receiving device 31, between described LED monochromatic source 30 and light-receiving device 31, be equiped with and the coaxial catoptron of described LED monochromatic source 30 and light-receiving device 31 centers, this catoptron is the half-mirror 32 that vacuum coating is made, and also is provided with and the coaxial convex lens 33 of described LED monochromatic source 30 and half-mirror 32 centers in the side of described LED monochromatic source 30 and half-mirror 32.

Wherein, 30 one-tenth miter angles of described half-mirror 32 and described LED monochromatic source, and with 33 one-tenth miter angles of described convex lens.

Please consult Fig. 2 simultaneously, to detected material 4, light projector and reflected light are same optical axis.The light transmission half-mirror 32 that LED monochromatic source 30 is sent, focus on the testee 4 by convex lens 33, after the light that reflects from testee 4 is focused on by convex lens 33, see through half-mirror 32 and receive by light-receiving device 31 and be converted into level signal by the circuit board (not shown).

Please consult Fig. 3 simultaneously, electro-optical pickoff of the present utility model also comprises the circuit board (not shown) that is electrically connected with described optical system, and the amplifying circuit that this circuit board (not shown) is provided with the sensitive device circuit that is electrically connected with light-receiving device 31, link to each other successively with described sensitive device circuit, synchronizing circuit and output circuit vibrate; Wherein, described vibration synchronizing circuit also links to each other with light emitting diode with the current amplification circuit that links to each other successively, and described output circuit also links to each other with power supply by mu balanced circuit.

In monochromatic source, green light LED (565mm) and red-light LED (660mm) have his own strong points.Green light LED is longer than service life of incandescent lamp, and highly sensitive at very wide color gamut internal ratio red light source.Red-light LED has response to limited color combination, but its detection distance is far away than green light LED.The detection distance of common red light source sensor is 6～8 times of green light source sensor.

Claims

1. electro-optical pickoff, comprise shell, be installed in mirror holder, the optical system of described enclosure and the circuit board that is electrically connected with described optical system, it is characterized in that: described optical system comprises into the light projector and the light-receiving device of vertical arrangement, between described light projector and light-receiving device, be equiped with and the coaxial catoptron of described light projector and light-receiving device center, also be provided with and the coaxial convex lens of described light-receiving device and catoptron center in the side of described light-receiving device and catoptron.

2. electro-optical pickoff as claimed in claim 1 is characterized in that: described light projector is a monochromatic source.

3. electro-optical pickoff as claimed in claim 1 is characterized in that: described catoptron is the half-mirror of plated film.

4. as claim 1,2 or 3 described electro-optical pickoffs, it is characterized in that: described half-mirror becomes miter angle with described monochromatic source.

5. electro-optical pickoff as claimed in claim 4 is characterized in that: described half-mirror becomes miter angle with described convex lens.

6. electro-optical pickoff as claimed in claim 5 is characterized in that: the amplifying circuit that described circuit board is provided with the sensitive device circuit that is electrically connected with light-receiving device, link to each other successively with described sensitive device circuit, synchronizing circuit and output circuit vibrate; Wherein, described vibration synchronizing circuit also links to each other with light emitting diode with the current amplification circuit that links to each other successively, and described output circuit also links to each other with power supply by mu balanced circuit.