CN209166467U - A kind of background inhibition photoelectric sensor - Google Patents
A kind of background inhibition photoelectric sensor Download PDFInfo
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- CN209166467U CN209166467U CN201822100647.8U CN201822100647U CN209166467U CN 209166467 U CN209166467 U CN 209166467U CN 201822100647 U CN201822100647 U CN 201822100647U CN 209166467 U CN209166467 U CN 209166467U
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Abstract
The purpose of the application is to provide a kind of background inhibition photoelectric sensor, it include: shell, and the transmitter of setting inside housings, diversing lens, receiving lens, receiver and curved mirror, the transmitter, diversing lens, curved mirror, receiving lens and receiver are set gradually along optical path, the transmitter emits light, testee is projected to after the diversing lens, and it is reflected by the testee, received lens projects are to curved mirror again, receiver is converged to eventually by curved mirror, therefore it is not in blind area that the application, which provides the detection of measuring targets in detecting distance of background inhibition photoelectric sensor,.The application can eliminate the check frequency of existing photoelectric sensor, expand the detection range of object under test.
Description
Technical field
This application involves sensor technical field more particularly to a kind of background inhibition photoelectric sensors.
Background technique
Photoelectric sensor is using sensor of the photoelectric cell as detecting element.It first converts measured variation
At the variation of optical signal, electric signal is further then converted optical signals by photoelectric cell.Photoelectric sensor is generally by light
Source, optical path and photoelectric cell three parts composition.Photoelectric sensor is untouchable with its, the speed of response is high, is easy examined
The appearance color of object and the influence of background, using there are limitations in industrial processes.
Existing diffusing reflection is apart from setting type photoelectric sensor (referred to as BGS:Background Suppres- sion)
It is mapped to the diffusing reflection formed on target detection object using the light that photophore issues, some light is reflected on receiver,
Receiver receives signal and samples by chip interior, and adjustment etc. is converted into switching signal output, determines whether target object is deposited
And issue signal.However, can be with different colours when existing diffusing reflection is apart from setting type photoelectric sensor detecting distance
Object, detecting distance and there is different variations, it is desirable that distance sets sizing sensor to dark colour target detection thing
Sensing distance reaches 90% of nominal distance or more；But in the region close to sensor, there are biggish blind areas, in this way to work
For the dynamic biggish target detection thing in space, when detection object appears in blind area, detection and judgement just cannot achieve.It is existing
BGS use 2 proportional photodiodes or position detecting element, by detection object reflect light projector light beam will be in light receiving element
Upper imaging.This imaging position using different according to detection object distance and the principle of triangulation of difference as testing principle.
Shown in FIG. 1 is to use 2 proportional photodiodes as the working principle diagram of the BGS of receiver.2 ratio photoelectricity
One end (close to the side of light projector axis) of diode is known as the side N (Near), and the other end is known as the side F (Far).Relative to setting
Distance S1, in the case that detection object is present in the position close to sensor, reflected light will be imaged in the side N.Opposite, relative to
Set distance S1, in the case that detection object is present in remote position, reflected light will be imaged in the side F.Sensor can pass through meter
The light income difference of the side N and the side F is calculated to judge the position of detection object.Transmitter emits light, is projected to after diversing lens
Testee, and being reflected by the testee, then received lens projects are to 2 proportional photodiodes, when testee institute
The position at place exceeds setting range S1, and when within the scope of detecting distance S2, reflected light cannot be in 2 proportional photodiodes at this time
The side N and the side F between be imaged, will lead to blind area generate (shown in dash area), then BGS can not judge to detect by light quantity difference
The position of object.
Utility model content
The shortcomings that for the above-mentioned prior art or deficiency, the application technical problems to be solved are how to eliminate set distance
The check frequency of type photoelectric sensor makes sensor in practical applications, to the detecting distance range of setting without dead angle, without blind
Area, to overcome because the factors such as the shaking of kinematic accuracy or target detection thing of equipment lead to the difficulty for sensing fall short detectable substance
Topic.
For this purpose, the solution that the application provides is:
Provide a kind of background inhibition photoelectric sensor, comprising: shell and setting transmitter inside housings,
Diversing lens, receiving lens, receiver and curved mirror, the transmitter, diversing lens, curved mirror, receiving lens and receiver
It is set gradually along optical path, the transmitter emits light, testee is projected to after the diversing lens, and by described tested
Object reflection, then received lens projects converge to receiver by curved mirror to curved mirror.
Further, the background inhibition photoelectric sensor further includes receiver shielding case, the receiver shielding case
It is mounted on receiver front end face, is wrapped in the outside of the receiver, to shield a part of light, reduces the background inhibition
The induction region of photoelectric sensor.
Further, the background inhibition photoelectric sensor further includes filter, for filtering a part of light, makes institute
The light needed passes through the diversing lens.
Further, the background inhibition photoelectric sensor further includes light guide member, and the light guide member is arranged in shell
On body, after the background inhibition photoelectric sensor is powered or generates signal, the light guide member shows light.
Further, the background inhibition photoelectric sensor further includes circuit board, and the circuit board is set in shell,
Potentiometer is set in the circuit board, and the circuit board passes through the potentiometer output signal.
Further, the background inhibition photoelectric sensor further includes conducting wire, one end of the conducting wire and the circuit
Plate connection, the other end are drawn outside shell, are fixed on the housing by claw, the signal that the conducting wire generates circuit board is defeated
Out.
Further, the background inhibition photoelectric sensor further includes regulation button, and the regulation button is arranged in shell
It on body, is connect with potentiometer, potentiometer is adjusted by rotation regulation button, to change the background inhibition photoelectric sensor
Distance of reaction and mode signal output.
Further, the background inhibition photoelectric sensor further includes mirror holder, and the diversing lens and receiving lens are solid
It is scheduled on the mirror holder.
Further, the background inhibition photoelectric sensor uses ultrasonic fusing, realizes sealed waterproof effect.
Further, the light source that the transmitter uses is LD light source or LED light source.
Background inhibition photoelectric sensor provided herein is provided with curved mirror in sensor shell body, and curved mirror can
To change the route of light, and light is converged to focus (position of receiver), reflects luminous energy smoothly in the side N of sensor and the side F
Between be imaged, blind area will not be generated, thus can be with the position of accurate judgement detection object.
Detailed description of the invention
By reading a detailed description of non-restrictive embodiments in the light of the attached drawings below, the application's is other
Feature, objects and advantages will become more apparent upon:
Fig. 1: working principle diagram of the diffusing reflection of currently existing technology apart from setting type photoelectric sensor；
Fig. 2: the working principle diagram of the application background inhibition photoelectric sensor；
Fig. 3: the schematic diagram of background inhibition photoelectric sensor provided by a kind of embodiment of the application；
Fig. 4: the assembling figure based on background inhibition photoelectric sensor shown in Fig. 3；
Appended drawing reference: shell 1, transmitter 2, diversing lens 3, receiving lens 4, receiver 5, receiver shielding case 6, curved surface
Mirror 7, mirror holder 8, lamp window 9, conducting wire 10, adjusting knob 11, claw 12, filter 13, circuit board 14, object under test S, set distance
S1, detecting distance S2；
The same or similar appended drawing reference represents the same or similar component in attached drawing.
Specific embodiment
Above embodiments are only to illustrate the technical solution of the application and non-limiting, reference only to preferred embodiment to this Shen
It please be described in detail.Those skilled in the art should understand that can modify to the technical solution of the application
Or equivalent replacement should all cover without departing from the spirit and scope of technical scheme in claims hereof range.
The application is described in further detail with reference to the accompanying drawing.
A kind of working principle of background inhibition photoelectric sensor of the application is as shown in Figure 2:
According to the propagation path of light, transmitter 2, diversing lens 3, receiving lens 4, curved mirror 7 and receiver 5 are adjusted
To corresponding position, the light that transmitter 2 issues projects on object under test by diversing lens 3, anti-using testee
It is mapped in receiving lens 4, falls on light on curved mirror 7 by receiving lens 4.The optical function of curved mirror 7 can be four sides eight
The light of side converges to a point, i.e. the receipts luminous point of receiver 5.In this way, whatsoever the light of angle is fallen on curved mirror 7, finally
It will reflect and focus in the focus of receiver 5.Therefore the background inhibition photoelectric sensor of the application is in set distance S1
Or object under test S can be sensed in detecting distance S2, the detection to object S is not in blind area.Compared to shown in FIG. 1
The detection case of photoelectric sensor measuring targets provided by the prior art, background suppression type photoelectric transfer provided herein
Sensor can eliminate check frequency, to expand the detection range of object under test.
As shown in figure 3, a kind of background inhibition photoelectric sensor provided by the present application, comprising: shell 1 and setting exist
Transmitter 2, diversing lens 3, receiving lens 4, receiver 5 and curved mirror 7 inside shell 1, the transmitter 2, diversing lens
3, curved mirror 7, receiving lens 4 and receiver 5 are set gradually along optical path, and the transmitter 2 emits light, through the diversing lens
It is projected to testee after 3, and is reflected by the testee, then received lens 4 are projected to curved mirror 7, pass through curved mirror 7
Converge to receiver 5.
The background inhibition photoelectric sensor provided by a kind of embodiment of the application, containing includes receiver shielding case 6,
The receiver shielding case 6 is mounted on 5 front end face of receiver, is wrapped in the outside of the receiver 5, receiver shielding case 6 can
With to shield a part of light, reduce hot spot makes so as to reduce the induction region of the background inhibition photoelectric sensor
Background inhibition photoelectric sensor is more accurate to the induction of detected material body position.
Background inhibition photoelectric sensor shown in Fig. 3 further includes filter 13, and in the present embodiment, transmitter 2 is to the left
Edge emitting light source, the light source that transmitter 2 emits can choose LD light source or LED light source, for example feux rouges, infrared light, laser all may be used
Using the light source as transmitter 2, the selection of light source is selected according to different product demands.
Filter 13 is fixed on shell 1, is cooperated with shell 1 and is assembled.Filter 13 can filter out transmitter 2 and receive
A part of light of device 5 reduces veiling glare, and light required for making passes through the diversing lens 3 and receiver 5.
Background inhibition photoelectric sensor shown in Fig. 3 further includes lamp window 9, and in the present embodiment, the setting of lamp window 9 exists
On shell 1, lamp window 9 is a guide-lighting component, can show that power lights, power lights are powered in background inhibition photoelectric sensor
After grow bright, general display green；Lamp window 9 can also generate letter in background inhibition photoelectric sensor with displaing lamp, signal lamp
Bright light after number, generally yellow.Specific limitation is displayed without for the light color of lamp window 9 in the present embodiment.
Background inhibition photoelectric sensor shown in Fig. 3 further includes circuit board 14, and the circuit board 14 is fixed on shell 1
Interior, transmitter 2 and receiver 5 all connect circuit board 14.It is provided with potentiometer in circuit board 14, it, can be with by the potentiometer
Adjust the luminous intensity of transmitter 2, while 14 output signal of trigger circuit plate.
Background inhibition photoelectric sensor shown in Fig. 3 further includes conducting wire 10, one end of the conducting wire 10 and the circuit
Plate 14 connects, and the other end is drawn outside shell 1, is fixed on the shell 1 by claw 12, the conducting wire 10 produces circuit board 14
Raw signal output.Circuit board 14 has positive and negative anodes reversal connection protection function simultaneously, can avoid inverse connecing brought electrical damage.
Background inhibition photoelectric sensor shown in Fig. 3 further includes adjusting knob 11, the adjusting knob 11 in the present embodiment
There are two, described two adjusting knobs 11 are arranged on shell 1, connect with the potentiometer of circuit board 14.Two adjusting knobs 11
Pass through rotation, adjustable potentiometer, to change the distance of reaction and output side signal of the background inhibition photoelectric sensor
Formula.There are two types of mode signal outputs, the respectively output of NPN signal and PNP letter for the background inhibition photoelectric sensor of the present embodiment
Number output.
In the present embodiment, diversing lens 3 and receiving lens 4 are fixed on mirror holder 8, and mirror holder 8 is fixed in shell 1.
It is the assembly structure diagram of background inhibition photoelectric sensor in a kind of embodiment of the application shown in Fig. 4.Implement
Background inhibition photoelectric sensor assembling process is as follows in example: conducting wire 10 and circuit board 14 being welded, will be led by claw 12 later
Line 10 is fixed on shell 1, according to light route determination transmitter 3, diversing lens 3, receiving lens 4, curved mirror 7 and receiver 5
Position, mirror holder 8, lamp window 9 and shell 1 are then cooperated into compact assembly, install filter 13.This structure is small and compact,
Assembly is simple.Finally, background inhibition photoelectric sensor uses ultrasonic fusing, sealed waterproof effect is realized.
To sum up, photoelectric sensor compared with the existing technology, the application, which improves existing photoelectric sensor, can generate detection
The defect of blind area expands the detection range of object under test.
Obviously, those skilled in the art can carry out various modification and variations without departing from the essence of the application to the application
Mind and range.In this way, if these modifications and variations of the application belong to the range of the claim of this application extremely equivalent technologies
Within, then the application is also intended to include these modifications and variations.
Combine figure embodiment that the application is described in detail above, those skilled in the art can be according to upper
It states and bright many variations example is made to the application.Thus, certain details in embodiment should not constitute the restriction to the application, this
Apply the protection scope using the range that the appended claims define as the application.
Claims (10)
1. a kind of background inhibition photoelectric sensor characterized by comprising the transmitting of shell and setting inside housings
Device, diversing lens, receiving lens, receiver and curved mirror, the transmitter, diversing lens, curved mirror, receiving lens and reception
Device is set gradually along optical path, and the transmitter emits light, testee is projected to after the diversing lens, and by the quilt
Object reflection is surveyed, then received lens projects converge to receiver by curved mirror to curved mirror.
2. background inhibition photoelectric sensor according to claim 1, which is characterized in that it further include receiver shielding case,
The receiver shielding case is mounted on receiver front end face, is wrapped in the outside of the receiver, to shield a part of light, subtracts
The induction region of the small background inhibition photoelectric sensor.
3. background inhibition photoelectric sensor according to claim 1, which is characterized in that further include filter, be used for
A part of light is filtered, light required for making passes through the diversing lens.
4. background inhibition photoelectric sensor according to claim 1, which is characterized in that it further include lamp window, the lamp window
It is arranged on shell, after the background inhibition photoelectric sensor is powered or generates signal, the lamp window shows light.
5. background inhibition photoelectric sensor according to claim 1, which is characterized in that it further include circuit board, the electricity
Road plate is set in shell, and potentiometer is arranged in the circuit board, and the circuit board passes through the potentiometer output signal.
6. background inhibition photoelectric sensor according to claim 5, which is characterized in that it further include conducting wire, the conducting wire
One end connect with the circuit board, the other end is drawn outside shell, is fixed on the housing by claw, and the conducting wire is by circuit
The signal output that plate generates.
7. background inhibition photoelectric sensor according to claim 5, which is characterized in that it further include regulation button, it is described
Regulation button is arranged on shell, connect with potentiometer, adjusts potentiometer by rotation regulation button, to change the background suppression
The distance of reaction and mode signal output of property photoelectric sensor processed.
8. background inhibition photoelectric sensor according to claim 1, which is characterized in that it further include mirror holder, the transmitting
Lens and receiving lens are fixed on the mirror holder.
9. background inhibition photoelectric sensor according to claim 1, which is characterized in that the background inhibition photoelectric transfer
Sensor uses ultrasonic fusing, realizes sealed waterproof effect.
10. background inhibition photoelectric sensor according to claim 1, which is characterized in that the light that the transmitter uses
Source is LD light source or LED light source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822100647.8U CN209166467U (en) | 2018-12-13 | 2018-12-13 | A kind of background inhibition photoelectric sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822100647.8U CN209166467U (en) | 2018-12-13 | 2018-12-13 | A kind of background inhibition photoelectric sensor |
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| Publication Number | Publication Date |
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| CN209166467U true CN209166467U (en) | 2019-07-26 |
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| CN201822100647.8U Active CN209166467U (en) | 2018-12-13 | 2018-12-13 | A kind of background inhibition photoelectric sensor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109470284A (en) * | 2018-12-13 | 2019-03-15 | 上海索迪龙自动化有限公司 | A background suppression photoelectric sensor |
| CN116558553A (en) * | 2023-07-07 | 2023-08-08 | 深圳市华众自动化工程有限公司 | Small background suppression photoelectric sensor |
-
2018
- 2018-12-13 CN CN201822100647.8U patent/CN209166467U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109470284A (en) * | 2018-12-13 | 2019-03-15 | 上海索迪龙自动化有限公司 | A background suppression photoelectric sensor |
| CN116558553A (en) * | 2023-07-07 | 2023-08-08 | 深圳市华众自动化工程有限公司 | Small background suppression photoelectric sensor |
| CN116558553B (en) * | 2023-07-07 | 2023-09-22 | 深圳市华众自动化工程有限公司 | Small background suppression photoelectric sensor |
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Address after: 201399 No. 1053, Huicheng Road, Huinan Town, Pudong New Area, Shanghai Patentee after: Shanghai sodilon Automation Co.,Ltd. Address before: No. 1053 Huicheng Road, Huinan Town, Pudong New Area, Shanghai, 200120 Patentee before: SHANGHAI SODRON AUTOMATION CO.,LTD. |