CN106487452B - Optical signal receiving device - Google Patents
Optical signal receiving device Download PDFInfo
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- CN106487452B CN106487452B CN201510553136.XA CN201510553136A CN106487452B CN 106487452 B CN106487452 B CN 106487452B CN 201510553136 A CN201510553136 A CN 201510553136A CN 106487452 B CN106487452 B CN 106487452B
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Abstract
The application discloses an optical signal receiving device, comprising: the shell is accommodated in the machine body in the shell, the machine body is provided with a light receiving head for receiving external light signals, a photoelectric conversion device is arranged at the center of the light receiving head, and the light receiving head further comprises a funnel-shaped lamp cup for reflecting light rays onto the photoelectric conversion device. According to the optical signal receiving device provided by the application, the funnel-shaped lamp cup is arranged, and the photoelectric converter is arranged in the mechanism design of the center of the lamp cup, so that the optical signal received by the photoelectric converter is stronger; the lamp shade with the convex lens structure is arranged on the shell, so that light rays irradiating the lamp shade are converged to the lamp cup, the angle of the receivable light rays is increased, the use efficiency of light signals is greatly improved, and the transmission distance of the light signals is increased.
Description
Technical Field
The present application relates to the field of optical communications, and in particular, to an optical signal receiving device.
Background
Visible light communication is a communication using visible light for data transmission, for example, by high frequency blinking of an LED light source. The method is characterized by being applicable to any communication protocol, being applicable to any working environment, having better controllability, good confidentiality of visible light communication, difficult theft of communication data and higher safety.
The existing optical signal receiving device directly receives the optical signal, when light irradiates the photoelectric conversion device, the photoelectric conversion device converts the optical signal into a digital signal and transmits the digital signal to a signal circuit coupled with the photoelectric conversion device, wherein the light receiving area is only the area of the surface of the photoelectric conversion device capable of receiving the light of the tube, the effective area is small, the optical signal of the external transmitting end is difficult to accurately irradiate the photosensitive area, and the utilization rate of the optical signal is reduced.
The light signal receiving area of the existing light signal receiving device is not provided with an indicator lamp, or the indicator lamp can not obviously display the effective area of the received light signal, so that a user can not accurately distinguish the effective area of the received light signal, and the use is hindered.
Disclosure of Invention
In view of the foregoing deficiencies of the prior art, an object of the present application is to provide an optical signal receiving apparatus, in which a lamp cup structure is disposed around an optical signal receiving area, so as to effectively enhance the optical signal strength and the receiving area.
The technical scheme of the application is as follows:
an optical signal receiving apparatus comprising: the shell is accommodated in the machine body in the shell, the machine body is provided with a light receiving head for receiving external light signals, a photoelectric conversion device is arranged in the center of the light receiving head, and the light receiving head further comprises a lamp cup for reflecting the external light signals onto the photoelectric conversion device.
The light signal receiving device is characterized in that the lamp cup is of a funnel-shaped structure.
The light signal receiving device, wherein the light receiving area of the photoelectric conversion device is positioned at the center of the funnel-shaped necking of the lamp cup,
the light signal receiving device is characterized in that a lampshade with a convex lens structure is further arranged at the position, corresponding to the lamp cup, of the shell.
The photoelectric conversion device is one of a photodiode, a phototriode, a photoresistor and a photocell.
The light signal receiving device is characterized in that the inner surface of the lamp cup is plated with a silver mirror layer for reflecting light rays.
The optical signal receiving device comprises a machine body, wherein the machine body further comprises an upper cover, and an electrical element connected with the optical receiving head is accommodated in the upper cover.
The light signal receiving device is characterized in that the outer part of the lampshade is of a convex lens structure, and the inner bottom surface of the lampshade is of a plane structure.
The light signal receiving device is characterized in that a second window for installing the lampshade is arranged at the position, corresponding to the lamp cup, of the surface of the shell.
The optical signal receiving device is characterized in that a first window for allowing the optical receiving head to pass through is arranged on the surface of the upper cover.
The light signal receiving device is characterized in that the bottom of the lampshade extends to the periphery to form a skirt edge which is matched with the edge of the inner surface of the second window and used for fixing the lampshade.
The light signal receiving device is characterized in that a part of the lampshade with a convex lens structure protrudes out of the surface of the shell.
The light signal receiving device is characterized in that the funnel-shaped wide-mouth end face of the lamp cup is flush with the surface of the shell.
According to the optical signal receiving device provided by the application, the funnel-shaped lamp cup is arranged, and the photoelectric conversion device is arranged in the center of the lamp cup, so that the optical signal received by the photoelectric conversion device is stronger; the lamp shade with the convex lens structure is arranged on the shell, so that light rays irradiating the lamp shade are converged to the lamp cup, the angle of the receivable light rays is increased, the use efficiency of light signals is greatly improved, and the transmission distance of the light signals is increased.
Drawings
FIG. 1 is a schematic view of a housing according to an embodiment of the present application;
FIG. 2 is a schematic view of a machine body structure according to an embodiment of the present application;
fig. 3 is a schematic diagram of a mechanism of a PCB board in an embodiment of the present application;
FIG. 4 is a schematic diagram of a lamp cup according to an embodiment of the present application;
fig. 5 is an assembly effect diagram of an optical signal receiving apparatus according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of a lampshade according to an embodiment of the present application;
FIG. 7 is a diagram showing an internal structure of an LED aperture in an embodiment of the present application;
fig. 8 is an equivalent circuit diagram of the anti-prying circuit in an embodiment of the application.
Detailed Description
The present application provides an optical signal receiving apparatus, and the present application is further described in detail below in order to make the objects, technical solutions and effects of the present application more clear and definite. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
Embodiment 1,
The optical signal receiving device provided by the application, as shown in fig. 1-2, comprises a housing 1, a machine body 2 accommodated in the housing 1, wherein the machine body 2 is provided with an upper cover 3 for allowing a light receiving head to pass through, and a PCB 4 (shown in fig. 3) provided with the light receiving head, and a first window 31 for allowing the light receiving head to pass through is arranged on the surface of the upper cover 3. The central position of the light receiving head is provided with a photoelectric conversion device for sensitization, a lamp cup 6 with a funnel-shaped inner surface is arranged around the photoelectric conversion device, the sensitization area of the photoelectric conversion device is positioned at the right center of the funnel-shaped necking of the lamp cup 6, the funnel-shaped wide-mouth end of the lamp cup 6 is just opposite to the outer shell 1, and the end face of the funnel-shaped wide-mouth end of the lamp cup 6 is flush with the surface of the shell 1. The photoelectric conversion device may be one of a photodiode, a phototransistor, a photoresistor, and a photocell, and the photodiode 5 is preferably used in this embodiment.
The funnel-shaped structure is adopted in the lamp cup so as to realize the convergence of the incident light to the outside, and the lamp cup with similar optical convergence property can also be applied to the application.
As shown in fig. 1-3, the upper cover 3 is a right hexahedral housing with an opening at the bottom, the opening direction of the right hexahedral housing faces the PCB 4, a first opening window 31 for allowing a light receiving head to pass through is provided at the bottom of the PCB 4, the upper cover 3 is disposed above the PCB 4, and the light receiving head passes through the first opening window 31, so that the upper cover 3 plays a role in protecting the PCB 4 and the connector connection circuit. The non-photosensitive side of the photodiode is connected with a digital signal conversion circuit on the PCB 4, so that the optical signal is converted into a corresponding digital electric signal.
With such a design, as shown in fig. 4, by arranging the photodiode 5 at the center of the lamp cup 6, the light irradiated onto the lamp cup 6 is finally concentrated to the surface of the photodiode 5 through multiple refraction, so that the light which is not directly irradiated onto the surface of the photodiode 5 can be concentrated to the photosensitive area of the photodiode 5 at the bottom center after being reflected only by the inner surface of the lamp cup 6. The area of the optical signal received by the photodiode 5 is larger, the intensity of the optical signal is stronger, and the transmission quality of the optical signal is improved.
Further, the photodiode 5 is located at the bottom of the lamp cup 6, the top of the lamp cup 6 is a funnel-shaped wide-mouth end, and the bottom is a closing end. To improve the light reflection effect of the lamp cup 6, a silver mirror treatment is performed on the inner surface of the lamp cup 6, for example, a silver film is electroplated on the surface of the lamp cup 6.
In order to further increase the light receiving area of the light receiving head, as shown in fig. 5 and 6, a convex lens cover 11 is disposed on the housing 1, and the light projected from different angles is converged by the cover 11 and then irradiated to the inner surface of the lamp cup 6, so that the photodiode is sensitized. The bottom of the lampshade 11 is plane, the center position is outwards protruded to form a convex lens structure 110, and a skirt 111 for installation and fixation is arranged between the outer side of the protruded part of the lampshade 11 and the bottom surface. Specifically, the upper surface of the housing 1 is provided with a second opening 12 corresponding to the opening of the lamp cup 6, the lamp shade 11 passes through the second opening 12 from the inside of the housing 1, and the skirt 111 is attached to the edge of the inner side surface of the second opening 12, thereby limiting the displacement of the lamp shade 11 to the outside. The skirt 111 and the edge of the second window 12 are fixed together, and in this embodiment, holes are punched around the skirt 111 and the second window 12, and then the holes are fixed by thermoplastic columns, which can be fixed by other manners, for example, glue bonding.
Embodiment II,
In this embodiment, as shown in fig. 3, in order to clarify the visual recognition feature of the light signal receiving area, a circle of aperture formed by LED lamps 7 is further disposed around the periphery of the PCB board 4, and the light receiving head is disposed in the center of the aperture, so that the visual recognition effect of the light signal receiving area is clarified, and the light signal sending end can accurately and quickly send the light signal to the light signal receiving area.
Preferably, in order to enable the aperture to indicate the light signal receiving area and to indicate other information such as the running state of the light signal receiving device, the LED lamps 7 around the aperture may be arranged according to a certain rule so as to present different light emitting states, thereby indicating information corresponding to the light emitting states. In this embodiment, the LED lamps 7 of the aperture are arranged according to different colors, and the aperture presents different colors to indicate different running states. For example, in an initial state after installation, the aperture displays blue; after the diaphragm is installed, the diaphragm is changed from blue to cyan after receiving a correct signal for the first time; if the ID cell number of the optical signal is not correct, the diaphragm blinks for three seconds; if the ID sent by the optical key is an effective ID number and has the door opening right, the aperture is green; the blue color of the aperture continuously blinks after the receiver face is not allowed to be prized. In the implementation process, the LED lamps 7 can be distributed at intervals according to two colors of blue and green, when the LED lamps 7 with single color are controlled to emit light, the whole aperture presents a corresponding monochromatic light ring, and when the LED lamps 7 with two colors are controlled to emit light simultaneously, the blue and green are overlapped to present cyan, so that the aperture presents a cyan aperture. Of course, other different indication manners may be adopted, for example, the LED lamp 7 is enabled to flash off clockwise or anticlockwise, and these alternatives are not exhaustive again.
Further, as shown in fig. 3 and 7, in order to make the light emitted by the LED lamp 7 be able to be dispersed outwards to form an aperture, a circle of light guide ring 8 surrounding the lamp cup 6 is arranged at the periphery of the lamp cup 6, a reflecting surface 81 with a surface of 45 ° is arranged at the bottom of the light guide ring 8 and horizontally positioned with the LED lamp 7, the reflecting surface 81 is continuously distributed in a circular shape along the circumference of the light receiving head, and the light emitted horizontally by the LED lamp 7 is deflected by 90 ° after being reflected by the reflecting surface 81 (as indicated by the arrow in fig. 7), and is emitted upwards from the bottom of the light guide ring 8, i.e. along the direction perpendicular to the surface of the upper cover 3, so that the periphery of the light receiving head forms an optical aperture.
Preferably, as shown in fig. 3, in order to make the light emitted by the aperture softer, the problem that the light is too concentrated and dazzling is not generated, a light-transmitting gear structure 61 is arranged at the bottom end of the light receiving head, namely, the outer side of the lamp cup 6, the light-transmitting gear structure 61 is arranged between the LED lamp 7 and the reflecting surface 81, the tooth surface of the light-transmitting gear is opposite to the LED lamp 7, so that the light emitted by the LED lamp 7 is uniformly dispersed and then irradiated onto the reflecting surface 81, and the effect that the reflected light is uniform and not dazzling is achieved.
Third embodiment,
Based on the description of the above embodiments, the optical signal receiving device provided in this embodiment is further provided with an anti-prying circuit in the body. As shown in fig. 8, the anti-prying circuit comprises a detection circuit and a buzzer alarm circuit which are electrically connected with each other, the detection circuit comprises a processor, a trigger switch and a detection power supply, and the processor and the detection power supply form the detection circuit through the trigger switch; the buzzer alarm circuit comprises a buzzer (H), a working power supply and a switch unit, wherein one electrode of the working power supply is electrically connected with one wiring terminal of the buzzer through the switch unit, the other wiring terminal of the buzzer is electrically connected with the other electrode of the working power supply, and the processor is electrically connected with the switch unit; when the trigger switch is turned off, the processor detects a low-level signal and sends a conduction signal to the switch unit, the switch unit is turned on, and the buzzer is started; when the trigger switch is turned off, the processor detects a high-level signal, the on signal input to the switch unit is interrupted, the triode is turned off, and the buzzer is turned off.
Further, as shown in fig. 1, the trigger switch is an anti-prying spring plate 32 fixed on the inner surface of the housing 1, pins opposite to the upper cover 3 are arranged on two sides of the anti-prying spring plate 32, an anti-prying circuit corresponding to the anti-prying spring plate 32 is arranged on the PCB board 4 inside the machine body 2, when the housing 1 and the machine body 2 are buckled with each other, the anti-prying spring plate 32 passes through the upper cover 3 of the machine body 2, two pins of the anti-prying spring plate are in electrical contact with the wiring terminals of the anti-prying circuit, and the anti-prying circuit is not triggered; when the optical signal receiving device receives external force damage to cause the shell 1 to be separated from the machine body 2, the two pins of the anti-prying spring plate 32 are separated from the wiring terminal of the anti-prying circuit, and the anti-prying circuit is triggered.
Further, as shown in fig. 8, in the present embodiment, the switch unit is a triode, in the buzzer alarm circuit, the positive electrode of the working power supply is electrically connected with a terminal of the buzzer, the other end of the buzzer is electrically connected with the emitter of the triode, the negative electrode of the working power supply is electrically connected with the base of the triode, the base of the triode is electrically connected with the processor, and the collector of the triode is grounded; when a trigger switch formed by the anti-prying elastic sheet 32 is disconnected, namely, the anti-prying elastic sheet 32 is separated from two wiring ends of a buzzer circuit, a processor detects a low-level signal and sends a low-level conduction signal to a triode, a switch unit is conducted, and the buzzer is started; when the anti-prying spring plate 32 is in contact with two wiring ends of the detection circuit, namely when the trigger switch is closed, the processor detects a high-level signal, and inputs a high-level cut-off signal interrupt to the triode, namely a low-level turn-on signal interrupt, the triode is cut off, and the buzzer is closed. As shown in fig. 5 and 8, when the casing 1 is buckled with the machine body 2, the processor detects a high-level signal, the triode is in a cut-off state, and the buzzer alarm loop is disconnected; when the shell 1 is separated from the machine body 2, the anti-prying spring plate 32 is separated from the circuit wiring terminal, the processor detects a low-level signal, the triode is in a conducting state, and the buzzer alarm circuit is sucked to form a loop, so that the buzzer long-ringing alarm is triggered. Thus, the anti-prying spring plate 32 forms a trigger switch structure, and the working state of the buzzer is controlled by the trigger switch structure, so that the anti-prying alarm function is realized. Of course, the switching unit is not limited to a triode, and a field effect transistor may be used, so long as the low level signal is detected by the processor according to the processor, and the field effect transistor is turned on, and otherwise, the circuit is turned off. Specifically, if the switching unit is a field effect transistor (not shown in the figure), the positive electrode of the working power supply is connected with one terminal of the buzzer, the other terminal of the buzzer is connected with the source electrode of the field effect transistor, the drain electrode of the field effect transistor is grounded, and the negative electrode of the working power supply is connected with the base electrode of the field effect transistor
Preferably, as shown in fig. 8, to ensure the safety of the circuit, at least one protection resistor is respectively connected in series in the detection circuit and the buzzer alarm circuit, specifically, a protection resistor R is connected in series between the positive electrode of the detection power supply and one terminal of the trigger switch, a protection resistor R is also connected in series between the other end of the trigger switch and the processor, and the negative electrode of the detection power supply is connected with the internal electric wire of the processor. Correspondingly, in the buzzer alarm circuit, a resistor R is connected in series between the negative electrode of the working power supply and the base electrode of the triode, and a protection resistor R is connected in series between the processor and the base electrode of the triode. Also for safety reasons, the transistor used in this embodiment is preferably a low power transistor with a power of less than 1W, such as a S9012 type transistor, so that the current flowing through the tamper resistant circuit is small.
Further, as shown in fig. 2, a through hole 33 is provided on the surface of the upper cover 3 corresponding to the pin of the tamper-proof elastic sheet 32, and when the housing 1 is buckled with the machine body 2, the two pins of the tamper-proof elastic sheet 32 respectively pass through the through hole 33 of the upper cover 3 to electrically contact with the terminal of the tamper-proof circuit.
According to the optical signal receiving device, the lens lampshade and the lamp cup are arranged, so that the use efficiency of an optical signal is greatly improved, and the transmission distance of the optical signal is increased; the light receiving head is arranged at the center of the aperture, so that the receiving area of the light signal is defined, and the light signal is accurately and quickly emitted; the anti-prying circuit detects whether the anti-prying elastic sheet fixed on the shell moves or not to carry out anti-prying alarm, and the anti-prying circuit has the advantages of low cost, no dependence on environmental factors, small limitation and no interference of external environment.
The foregoing is a further detailed description of the application in connection with specific embodiments, and it is not intended that the application be limited to such description. It will be apparent to those skilled in the art that several simple deductions or substitutions can be made without departing from the spirit of the application, and all such modifications and changes should be considered to be within the scope of the appended claims.
Claims (13)
1. An optical signal receiving apparatus, comprising: the light receiving head is provided with a photoelectric conversion device at the center, and the light receiving head also comprises a lamp cup for reflecting the external light signals to the photoelectric conversion device, and the lamp cup is arranged around the photoelectric conversion device;
the machine body further comprises a printed circuit board, the light receiving head is arranged on the printed circuit board, a light emitting diode is arranged on the printed circuit board around the light receiving head, and a light guide ring surrounding the lamp cup is arranged between the lamp cup and the light emitting diode around the periphery of the lamp cup; a reflecting surface surrounding the periphery of the lamp cup is arranged on the printed circuit board at the bottom of the light guide ring, one end of the reflecting surface is in contact with the lamp cup, the other end of the reflecting surface is in contact with the printed circuit board, and the included angle between the reflecting surface and the printed circuit board is 45 degrees;
the LED light source comprises a light emitting diode, a reflecting surface and a printed circuit board, wherein the printed circuit board is arranged between the light emitting diode and the reflecting surface, the light transmitting gear structure is provided with a tooth surface, and the tooth surface is opposite to the light emitting diode, so that light rays emitted by the light emitting diode are uniformly dispersed.
2. The optical signal receiving device of claim 1, wherein the lamp cup is of a funnel-shaped configuration.
3. The optical signal receiving apparatus according to claim 2, wherein the light receiving area of the photoelectric conversion device is located at a center position of the funnel-shaped constriction of the lamp cup.
4. The optical signal receiving device of claim 2 wherein the funnel-shaped wide mouth end face of the lamp cup is disposed flush with the housing surface.
5. The optical signal receiving device according to claim 1, wherein a lamp cover having a convex lens structure is further provided at a position of the housing corresponding to the lamp cup.
6. The optical signal receiving device of claim 5, wherein the outer portion of the lamp housing is a convex lens structure with a planar inner bottom surface.
7. The optical signal receiving apparatus according to claim 1, wherein the photoelectric conversion device is one of a photodiode, a phototransistor, a photoresistor, and a photocell.
8. A light signal receiving device according to claim 3, wherein the inner surface of the lamp cup is coated with a silver mirror layer for reflecting light.
9. The optical signal receiving device according to claim 1, wherein the body further comprises an upper cover, and the electrical component connected to the optical receiving head is accommodated in the upper cover.
10. The optical signal receiving device according to claim 5, wherein a second window for mounting the lamp housing is provided at a position of the housing surface corresponding to the lamp cup.
11. The optical signal receiving apparatus according to claim 9, wherein the upper cover surface is provided with a first window for passing the optical receiving head therethrough.
12. The optical signal receiving device of claim 10, wherein the bottom of the lamp housing extends to the periphery to form a skirt adapted to the edge of the inner surface of the second window for fixing the lamp housing.
13. An optical signal receiving device according to any one of claims 5, 10 or 12 wherein the portion of the lamp housing in the form of a convex lens structure protrudes from the surface of the housing.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510553136.XA CN106487452B (en) | 2015-09-01 | 2015-09-01 | Optical signal receiving device |
| KR1020177029601A KR102043091B1 (en) | 2015-03-25 | 2016-03-21 | Optical signal receiver |
| JP2017550135A JP6726682B2 (en) | 2015-03-25 | 2016-03-21 | Optical signal receiver |
| PCT/CN2016/076834 WO2016150360A1 (en) | 2015-03-25 | 2016-03-21 | Optical signal reception apparatus |
| EP16767737.6A EP3276856B1 (en) | 2015-03-25 | 2016-03-21 | Optical signal reception apparatus |
| US15/710,830 US10243669B2 (en) | 2015-03-25 | 2017-09-21 | Optical signal receiving apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510553136.XA CN106487452B (en) | 2015-09-01 | 2015-09-01 | Optical signal receiving device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106487452A CN106487452A (en) | 2017-03-08 |
| CN106487452B true CN106487452B (en) | 2023-09-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510553136.XA Active CN106487452B (en) | 2015-03-25 | 2015-09-01 | Optical signal receiving device |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111525841B (en) * | 2020-05-13 | 2022-07-12 | 苏州艾克威尔科技有限公司 | Mining soft starter with infrared control |
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| JPH09331075A (en) * | 1996-06-12 | 1997-12-22 | Sony Corp | Infrared ray receiver |
| CN102957479A (en) * | 2011-08-31 | 2013-03-06 | 深圳光启高等理工研究院 | LED visible light communication system and light receiving antenna |
| CN103050550A (en) * | 2011-10-14 | 2013-04-17 | 黄雨旸 | Light collecting solar cell and packaging body structure thereof |
| CN104421788A (en) * | 2013-08-27 | 2015-03-18 | 鸿富锦精密工业（深圳）有限公司 | Automobile lamp module |
| CN204948082U (en) * | 2015-09-01 | 2016-01-06 | 深圳光启智能光子技术有限公司 | A kind of light signal receiving |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8244134B2 (en) * | 2007-06-19 | 2012-08-14 | Charles Santori | Optical interconnect |
| US8860819B2 (en) * | 2013-01-08 | 2014-10-14 | Peripheral Vision, Inc. | Automated lighting system characterization device and system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09331075A (en) * | 1996-06-12 | 1997-12-22 | Sony Corp | Infrared ray receiver |
| CN102957479A (en) * | 2011-08-31 | 2013-03-06 | 深圳光启高等理工研究院 | LED visible light communication system and light receiving antenna |
| CN103050550A (en) * | 2011-10-14 | 2013-04-17 | 黄雨旸 | Light collecting solar cell and packaging body structure thereof |
| CN104421788A (en) * | 2013-08-27 | 2015-03-18 | 鸿富锦精密工业（深圳）有限公司 | Automobile lamp module |
| CN204948082U (en) * | 2015-09-01 | 2016-01-06 | 深圳光启智能光子技术有限公司 | A kind of light signal receiving |
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