Self-adaptive attenuation visible light communication assembly and communication device

Abstract

The utility model discloses a self-adaptive attenuation visible light communication assembly and communication equipment. The visible light communication assembly comprises a first photoelectric detector, a second photoelectric detector, a light attenuation structure and a control circuit. Wherein the first photoelectric detector can collect light intensity, convert the light intensity into a first electric signal and output the first electric signal to the control circuit, and the control circuit calculates intensity required to be attenuated by illumination according to the first electric signal, controls the light attenuation structure to correspondingly attenuate the light intensity and then inputs the light intensity to the second photoelectric detector. The precision parameter of the second photoelectric detector is greater than that of the first photoelectric detector. The second photoelectric detector collects the attenuated light intensity, converts the attenuated light intensity into a second electric signal and outputs the second electric signal to the control circuit, and the control circuit can work according to the second electric signal. Therefore, the attenuation capability of the light attenuation structure can be dynamically adjusted according to the light intensity detected by the first photoelectric detector, so that the second photoelectric detector is prevented from being damaged due to the fact that strong light directly irradiates the second photoelectric detector.

Description

Technical Field

[0001] The utility model relates to the technical field of optical communication, and in particular to an adaptively attenuated visible light communication component and communication equipment. Background Art

[0002] Visible light communication technology is an emerging communication technology that uses visible light waves as a carrier for information transmission. Compared with traditional radio frequency communication, visible light communication has several significant characteristics: high bandwidth, free frequency band and no electromagnetic interference. In visible light communication systems, high-precision photodetectors are essential for achieving efficient optical signal detection.

[0003] However, high-precision photodetectors are easily damaged by strong light during the light detection process. Utility Model Content

[0004] The main purpose of the utility model is to provide a visible light communication component with adaptive attenuation, aiming to solve the problem that high-precision photoelectric detectors are easily damaged by strong light.

[0005] To achieve the above-mentioned purpose, the utility model proposes an adaptive attenuation visible light communication component, comprising:

[0006] A first photoelectric detector, used for collecting light intensity and converting it into a first electrical signal for output;

[0007] A second photodetector, used to collect light intensity and convert it into a second electrical signal for output; wherein the accuracy parameter of the second photodetector is greater than the accuracy parameter of the first photodetector;

[0008] A light attenuation structure, the light attenuation structure is arranged on one side of the second photodetector; the light attenuation structure is used to attenuate the light intensity and then input it to the second photodetector;

[0009] A control circuit, wherein the control circuit is respectively connected to the first photodetector, the second photodetector and the light attenuation structure; the control circuit is used to receive the first electrical signal and control the operation of the light attenuation structure according to the first electrical signal, and is used to receive the second electrical signal and operate according to the second electrical signal.

[0010] Optionally, the control circuit includes:

[0011] a microcontroller, the microcontroller being connected to the first photodetector and the second photodetector respectively; the microcontroller being used to output a control signal according to the first electrical signal; the microcontroller being also used to operate according to the second electrical signal;

[0012] A driving circuit is connected to the light attenuation structure and the microcontroller respectively; the driving circuit is used to receive the control signal and drive the light attenuation structure to work according to the control signal.

[0013] Optionally, the light attenuation structure is a voltage-controlled filter.

[0014] Optionally, the driving circuit includes a driving chip; the driving chip is used to adjust the driving voltage input to the voltage-controlled filter according to the control signal.

[0015] Optionally, the driving circuit further includes a voltage conversion circuit; the voltage conversion circuit is respectively connected to an external power supply voltage and the driving chip; the voltage conversion circuit is used to convert the external power supply voltage and output it.

[0016] Optionally, the driving circuit also includes a temperature detection circuit; the temperature detection circuit is connected to the driving chip; the temperature detection circuit is used to detect the temperature of the driving chip and output an over-temperature signal when the temperature of the driving chip exceeds a preset temperature; the driving chip is also used to receive the over-temperature signal and operate according to the over-temperature signal.

[0017] Optionally, the driving circuit further includes an indicator light circuit; the indicator light circuit is connected to the driving chip; the driving chip is also used to control the operation of the indicator light circuit.

[0018] Optionally, the voltage conversion circuit includes a first resistor, a second resistor and a voltage conversion chip; the IN pin of the voltage conversion chip is connected to an external power supply voltage, the OUT pin of the voltage conversion chip is connected to one end of the first resistor and the power input end of the driving chip, the FB pin of the voltage conversion chip is connected to the other end of the first resistor and one end of the second resistor, and the other end of the second resistor is grounded.

[0019] Optionally, the temperature detection circuit includes a temperature detection chip.

[0020] The utility model also provides a communication device, which includes the adaptive attenuation visible light communication component as described above.

[0021] The technical solution of the utility model adopts an adaptive attenuation visible light communication component, including a first photodetector, a second photodetector, a light attenuation structure and a control circuit. Among them, the first photodetector can collect light intensity, convert it into a first electrical signal and output it to the control circuit. The control circuit can calculate the intensity of the light that needs to be attenuated according to the first electrical signal, and control the light attenuation structure to attenuate the light intensity accordingly before inputting it into the second photodetector. Among them, the accuracy parameter of the second photodetector is greater than the accuracy parameter of the first photodetector. The second photodetector can collect the attenuated light intensity and convert it into a second electrical signal and output it to the control circuit. The control circuit can work according to the second electrical signal, for example, it can display the light intensity detection result according to the second electrical signal or transmit the second electrical signal to the next level communication circuit after processing. In this way, the utility model can adaptively and dynamically adjust the light intensity attenuation capacity of the light attenuation structure according to the light intensity detected by the first photodetector to ensure that the second photodetector can work normally, and the collected light intensity does not exceed the tolerable range, that is, the second photodetector will not be damaged by strong light irradiation. In this way, the utility model can solve the problem that photodetectors with large accuracy parameters are easily damaged by strong light irradiation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0023] Figure 1 It is a structural schematic diagram of an embodiment of an adaptive attenuation visible light communication component of the utility model;

[0024] Figure 2 It is a structural schematic diagram of another embodiment of an adaptive attenuation visible light communication component of the utility model;

[0025] Figure 3 This is a schematic diagram of the structure of a driving circuit of an embodiment of an adaptive attenuation visible light communication component of the utility model;

[0026] Figure 4 This is an electronic circuit diagram of a voltage conversion circuit of an embodiment of an adaptive attenuation visible light communication component of the utility model.

[0027] Description of Figure Numbers:

[0028]

[0029]

[0030] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0033] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0034] In the prior art, high-precision photoelectric detectors are easily damaged when exposed to strong light during the light detection process.

[0035] In order to solve the above problems, the utility model proposes a visible light communication component with adaptive attenuation.

[0036] In one embodiment of the present invention, Figure 1 As shown, the adaptive attenuation visible light communication component includes:

[0037] The first photodetector 100 is used to collect light intensity and convert it into a first electrical signal for output;

[0038] The second photodetector 200 is used to collect light intensity and convert it into a second electrical signal for output; wherein the accuracy parameter of the second photodetector 200 is greater than the accuracy parameter of the first photodetector 100;

[0039] A light attenuation structure 400, which is disposed on one side of the second photodetector 200; the light attenuation structure 400 is used to attenuate the light intensity and then input it to the second photodetector 200;

[0040] The control circuit 300 is connected to the first photodetector 100, the second photodetector 200 and the light attenuation structure 400 respectively; the control circuit 300 is used to receive a first electrical signal and control the operation of the light attenuation structure 400 according to the first electrical signal, and is used to receive a second electrical signal and operate according to the second electrical signal.

[0041] It should be noted that the accuracy parameters of the photodetector may include parameters such as gain and sensitivity. Among them, the larger the sensitivity parameter, the stronger the photodetector's ability to respond to changes in light signals; the larger the gain, the greater the change in the amplification amplitude of the photodetector's output of converting the input of the light signal into an electrical signal, and the larger the dynamic range of detection. In this embodiment, the larger the accuracy parameter of the photodetector, the stronger the photodetector's ability to detect light signals. It can be understood that photodetectors with smaller accuracy parameters, such as PIN photodetectors and APD (Avalanche Photodiode) photodetectors, have poor detection capabilities for light signals, but are not easily damaged by strong light. Photodetectors with larger accuracy parameters, such as PMT (Photomultiplier Tube) photodetectors, have stronger detection capabilities for light signals, but are easily damaged by strong light.

[0042] In this embodiment, the first photodetector 100 can collect light intensity, convert it into a first electrical signal and output it to the control circuit 300. The control circuit 300 can calculate the intensity of the light that needs to be attenuated based on the first electrical signal, and control the light attenuation structure 400 to attenuate the light intensity accordingly before inputting it into the second photodetector 200. Among them, the accuracy parameter of the second photodetector 200 is greater than the accuracy parameter of the first photodetector 100. The second photodetector 200 can collect the attenuated light intensity and convert it into a second electrical signal and output it to the control circuit 300. The control circuit 300 can work according to the second electrical signal, for example, it can display the light intensity detection result or transmit the second electrical signal to the next level communication circuit after processing. In this way, this embodiment can adaptively adjust the light intensity attenuation capability of the light attenuation structure 400 according to the light intensity detected by the first photodetector 100 to ensure that the second photodetector 200 can work normally, and the collected light intensity does not exceed the tolerable range, that is, the second photodetector 200 will not be damaged by strong light irradiation. In this way, this embodiment can solve the problem that photodetectors with large accuracy parameters are easily damaged by strong light irradiation.

[0043] In this embodiment, the light intensity attenuation capability of the light attenuation structure 400 can be changed according to the change of the light intensity detected by the first photodetector 100. Among them, if the light intensity attenuation capability of the light attenuation structure 400 becomes smaller, the dynamic range of the light intensity that can be detected by the second photodetector 200 increases, the output voltage value of the second electrical signal increases, and the voltage transmitted to the subsequent circuit through the control circuit 300 also increases. If the light intensity attenuation capability of the light attenuation structure 400 becomes larger, the second photodetector 200 can be protected from being damaged by strong light breakdown, the output voltage value of the second electrical signal decreases, and the voltage transmitted to the subsequent circuit through the control circuit 300 also decreases. In this way, this embodiment can also realize automatic gain control of the output of the subsequent circuit.

[0044] In the present invention, the first photodetector 100 can collect light intensity, convert it into a first electrical signal and output it to the control circuit 300. The control circuit 300 can calculate the intensity of the light that needs to be attenuated based on the first electrical signal, and control the light attenuation structure 400 to attenuate the light intensity accordingly before inputting it into the second photodetector 200. Among them, the accuracy parameter of the second photodetector 200 is greater than the accuracy parameter of the first photodetector 100. The second photodetector 200 can collect the attenuated light intensity, and convert it into a second electrical signal and output it to the control circuit 300. The control circuit 300 can work according to the second electrical signal. In this way, the present invention can adaptively and dynamically adjust the light intensity attenuation capability of the light attenuation structure 400 according to the light intensity detected by the first photodetector 100, so as to ensure that the second photodetector 200 can work normally, and the collected light intensity does not exceed the tolerable range, that is, the second photodetector 200 will not be damaged by strong light irradiation. In this way, the present invention can solve the problem that photodetectors with large accuracy parameters are easily damaged by strong light irradiation.

[0045] Further, in an embodiment of the present invention, if Figure 2 As shown, the control circuit 300 includes:

[0046] A microcontroller 310, the microcontroller 310 is connected to the first photodetector 100 and the second photodetector 200 respectively; the microcontroller 310 is used to output a control signal according to the first electrical signal; the microcontroller 310 is also used to work according to the second electrical signal;

[0047] The driving circuit 320 is connected to the light attenuation structure 400 and the microcontroller 310 respectively; the driving circuit 320 is used to receive a control signal and drive the light attenuation structure 400 to work according to the control signal.

[0048] In this embodiment, the first photodetector 100 can collect light intensity, convert it into a first electrical signal and output it to the microcontroller 310. The microcontroller 310 can calculate the intensity of the light that needs to be attenuated based on the first electrical signal, and output a control signal to control the driving circuit 320 to drive the light attenuation structure 400 to adaptively attenuate the light intensity before inputting it into the second photodetector 200. The second photodetector 200 can collect the attenuated light intensity and convert it into a second electrical signal and output it to the microcontroller 310. The microcontroller 310 can work according to the second electrical signal. In this embodiment, by controlling through the microcontroller 310 and driving the light intensity attenuation through the driving circuit 320, precise control and driving can be achieved, and the stability and reliability of the operation of the visible light communication component with adaptive attenuation can be improved.

[0049] Further, in an embodiment of the present invention, if Figure 2 As shown, the light attenuation structure 400 is a voltage-controlled filter 400 .

[0050] In this embodiment, the voltage-controlled filter 400 can be disposed at the front end of the second photodetector 200, and the intensity of the transmitted light can be adjusted by changing the voltage applied thereto, so as to achieve precise adjustment and control of the optical signal, thereby achieving dynamic adjustment of the intensity of the light input to the second photodetector 200. In this embodiment, the voltage-controlled filter 400 has a fast response speed and can achieve adjustment of the optical signal within milliseconds. Moreover, the voltage-controlled filter 400 can be used for adjusting optical signals of various wavelength ranges and spectral characteristics, and has a wide range of applications.

[0051] In this embodiment, the light intensity attenuation coefficient of the voltage-controlled filter 400 can change according to the change of the light intensity detected by the first photodetector 100. Among them, the light intensity attenuation coefficient of the voltage-controlled filter 400 is reduced, which can increase the dynamic range that can be detected by the second photodetector 200 and the output voltage value of the second electrical signal. The increase in the attenuation coefficient of the voltage-controlled filter 400 can protect the second photodetector 200 from being damaged by strong light breakdown, and can also reduce the output voltage value of the second electrical signal. In this way, this embodiment can realize automatic gain control of the subsequent circuit.

[0052] Further, in an embodiment of the present invention, if Figure 3 As shown, the driving circuit 320 includes a driving chip 321 ; the driving chip 321 is used to adjust the driving voltage of the input voltage-controlled filter 400 according to the control signal.

[0053] In this embodiment, the driver chip 321 can adjust the output voltage accordingly according to the control signal output by the microcontroller 310, thereby changing the voltage of the voltage-controlled filter 400 to adjust the intensity of the transmitted light. Then, the light intensity is attenuated and then input into the second photodetector 200 to protect the second photodetector 200 from being damaged by strong light. Among them, the driver chip 321 has a high degree of integration, which can simplify the structure of the communication component, reduce the volume, and reduce power consumption and cost. It should be noted that the driver chip 321 can include a signal amplification circuit and a signal conversion circuit to process the input control signal and then output a driving voltage according to the processed control signal.

[0054] Further, in an embodiment of the present invention, if Figure 3 As shown, the driving circuit 320 further includes a voltage conversion circuit 322 ; the voltage conversion circuit 322 is connected to the external power supply voltage and the driving chip 321 respectively; the voltage conversion circuit 322 is used to convert the external power supply voltage and output it.

[0055] In this embodiment, the voltage conversion circuit 322 can convert the external power supply voltage and output it to the driver chip 321. For example, the normal operation of the driver chip 321 requires the input of 3.1V and 200mV voltages, and the external input power supply voltage is 5V. The voltage conversion circuit 322 can convert the 5V voltage into 3.1V and 200mV voltages and output them to the driver chip 321 for operation. It should be noted that the conversion of the 5V voltage into 3.1V and 200mV is only used to illustrate the working process, and does not limit the scope of voltage conversion by the voltage conversion circuit 322.

[0056] Further, in an embodiment of the present invention, if Figure 3 As shown, the driving circuit 320 also includes a temperature detection circuit 323; the temperature detection circuit 323 is connected to the driving chip 321; the temperature detection circuit 323 is used to detect the temperature of the driving chip 321, and output an over-temperature signal when the temperature of the driving chip 321 exceeds a preset temperature; the driving chip 321 is also used to receive the over-temperature signal and work according to the over-temperature signal.

[0057] In this embodiment, the temperature detection circuit 323 can detect the temperature of the driver chip 321, and when the temperature of the chip exceeds the preset temperature, such as exceeding 90°C, it can output a high-level over-temperature signal. The driver chip 321 can stop working when receiving the high-level over-temperature signal to prevent the driver chip 321 from being damaged by high temperature. It should be noted that the preset temperature of 90°C is only used to illustrate the working process, and does not limit the value of the preset temperature.

[0058] Further, in an embodiment of the present invention, if Figure 3As shown, the driving circuit 320 further includes an indicator light circuit 324 ; the indicator light circuit 324 is connected to the driving chip 321 ; the driving chip 321 is also used to control the operation of the indicator light circuit 324 .

[0059] In this embodiment, when the driving chip 321 is working, that is, when the control signal is converted into a driving voltage to drive the voltage-controlled filter 400 to work, the indicator light circuit 324 can be controlled to work, and the indicator light of the indicator light circuit 324 is lit. When the driving chip 321 does not need to work, the indicator light of the indicator light circuit 324 can be controlled to go out. In this way, the user can be reminded of the working status of the driving circuit 320.

[0060] Further, in an embodiment of the present invention, if Figure 4 As shown, the voltage conversion circuit 322 includes a first resistor R1, a second resistor R2 and a voltage conversion chip U1; the IN pin of the voltage conversion chip U1 is connected to the external power supply voltage, the OUT pin of the voltage conversion chip U1 is connected to one end of the first resistor R1 and the power input end of the driving chip 321, the FB pin of the voltage conversion chip U1 is connected to the other end of the first resistor R1 and one end of the second resistor R2, and the other end of the second resistor R2 is grounded.

[0061] In this embodiment, the external power supply voltage can be input through the IN pin of the voltage conversion chip U1 and output through the OUT pin after conversion. Among them, the FB pin of the voltage conversion chip U1 can detect the voltage value of the output voltage, which can realize accurate monitoring of the output voltage and improve the stability of voltage conversion.

[0062] Furthermore, in an embodiment of the present invention, the temperature detection circuit 323 includes a temperature detection chip.

[0063] In this embodiment, the temperature detection chip integrates a temperature sensor and a signal processing circuit, has good temperature response characteristics and stability, and can adapt to different working conditions.

[0064] The utility model also proposes a communication device, which includes a visible light communication component with adaptive attenuation. The specific structure of the visible light communication component with adaptive attenuation refers to the above-mentioned embodiment. Since the communication device adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0065] The above description is only an optional embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A visible light communication component with adaptive attenuation, characterized in that: include: A first photoelectric detector, used for collecting light intensity and converting it into a first electrical signal for output; A second photodetector, used to collect light intensity and convert it into a second electrical signal for output; wherein the accuracy parameter of the second photodetector is greater than the accuracy parameter of the first photodetector; A light attenuation structure, the light attenuation structure is arranged on one side of the second photodetector; the light attenuation structure is used to attenuate the light intensity and then input it to the second photodetector; A control circuit, wherein the control circuit is respectively connected to the first photodetector, the second photodetector and the light attenuation structure; the control circuit is used to receive the first electrical signal and control the operation of the light attenuation structure according to the first electrical signal, and is used to receive the second electrical signal and operate according to the second electrical signal.

2. The adaptive attenuation visible light communication component according to claim 1, characterized in that: The control circuit comprises: a microcontroller, the microcontroller being connected to the first photodetector and the second photodetector respectively; the microcontroller being used to output a control signal according to the first electrical signal; the microcontroller being also used to operate according to the second electrical signal; A driving circuit is connected to the light attenuation structure and the microcontroller respectively; the driving circuit is used to receive the control signal and drive the light attenuation structure to work according to the control signal.

3. The adaptive attenuation visible light communication component according to claim 2, characterized in that: The light attenuation structure is a voltage-controlled filter.

4. The adaptive attenuation visible light communication component according to claim 3, characterized in that: The driving circuit includes a driving chip; the driving chip is used to adjust the driving voltage input to the voltage-controlled filter according to the control signal.

5. The adaptive attenuation visible light communication component according to claim 4, characterized in that: The driving circuit also includes a voltage conversion circuit; the voltage conversion circuit is connected to the external power supply voltage and the driving chip respectively; the voltage conversion circuit is used to convert the external power supply voltage and output it.

6. The adaptive attenuation visible light communication component according to claim 4, characterized in that: The driving circuit also includes a temperature detection circuit; the temperature detection circuit is connected to the driving chip; the temperature detection circuit is used to detect the temperature of the driving chip and output an over-temperature signal when the temperature of the driving chip exceeds a preset temperature; the driving chip is also used to receive the over-temperature signal and work according to the over-temperature signal.

7. The adaptive attenuation visible light communication component according to claim 4, characterized in that: The driving circuit also includes an indicator light circuit; the indicator light circuit is connected to the driving chip; the driving chip is also used to control the operation of the indicator light circuit.

8. The adaptive attenuation visible light communication component according to claim 5, characterized in that: The voltage conversion circuit includes a first resistor, a second resistor and a voltage conversion chip; the IN pin of the voltage conversion chip is connected to an external power supply voltage, the OUT pin of the voltage conversion chip is connected to one end of the first resistor and the power input end of the driving chip, the FB pin of the voltage conversion chip is connected to the other end of the first resistor and one end of the second resistor, and the other end of the second resistor is grounded.

9. The adaptive attenuation visible light communication component according to claim 6, characterized in that: The temperature detection circuit includes a temperature detection chip.

10. A communication device, characterized in that: The communication device comprises the adaptive attenuation visible light communication component according to any one of claims 1 to 9.

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