CN220040783U - Proximity sensor for infrared illuminance dual detection - Google Patents
Proximity sensor for infrared illuminance dual detection Download PDFInfo
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- CN220040783U CN220040783U CN202321418918.9U CN202321418918U CN220040783U CN 220040783 U CN220040783 U CN 220040783U CN 202321418918 U CN202321418918 U CN 202321418918U CN 220040783 U CN220040783 U CN 220040783U
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- 238000001514 detection method Methods 0.000 title claims abstract description 51
- 230000009977 dual effect Effects 0.000 title claims abstract description 22
- 238000005286 illumination Methods 0.000 claims abstract description 11
- 238000013459 approach Methods 0.000 abstract description 8
- 238000005070 sampling Methods 0.000 abstract description 5
- 238000005457 optimization Methods 0.000 abstract description 4
- 230000006698 induction Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 8
- 238000005259 measurement Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 230000000087 stabilizing effect Effects 0.000 description 3
- 239000002184 metal Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
The utility model discloses a proximity sensor for dual detection of infrared illuminance, which comprises a power supply module, a sensor and a sensor, wherein the power supply module is used for detecting power supply; the main control module is used for controlling the module; the illumination detection module is used for detecting the illumination of the environment; and the infrared receiving and transmitting module is used for transmitting and receiving infrared rays. According to the utility model, the threshold value of infrared receiving is dynamically adjusted through the ambient illumination intensity so as to compensate the error of the ambient illumination to the infrared measuring distance, the PWM is adopted to control the infrared transmitting tube to transmit the infrared signal, the infrared reflected signal received by the infrared receiving diode is detected through ADC sampling, a signal variation is obtained after processing, whether a person approaches or not is judged through comparing the signal variation with the threshold value, and the detection distance of approach induction after optimization is more accurate.
Description
Technical Field
The utility model relates to the technical field of intelligent home, in particular to a proximity sensor for dual detection of infrared illuminance.
Background
In smart home products, there are often applications where the product needs to use a proximity sensing sensor, such as when a smart screen is in proximity to a person, when a smart switch is in proximity to a person, a backlight needs to be lit. At present, most of proximity sensing in the market uses a radar and infrared reflection mode, but radar distance sensing cannot penetrate through metal, and the rear of a liquid crystal screen of a product such as an intelligent screen is metal, so that the radar cannot be used for distance detection; the infrared reflection sensor is large in size, short in detection distance and easy to be interfered by sunlight to cause detection failure, so that the two schemes are not good in effect at present, and the problems are solved by arranging the proximity sensor for dual detection of infrared illuminance.
Disclosure of Invention
Therefore, the utility model aims to provide a proximity sensor for dual detection of infrared illuminance, which dynamically adjusts the threshold value of infrared reception through the intensity of ambient illuminance so as to compensate the error of the ambient illuminance on the infrared measurement distance, adopts a PWM (pulse-width modulation) control infrared transmitting tube to transmit infrared signals, samples and detects infrared reflection signals received by an infrared receiving diode through an ADC (analog-to-digital converter), obtains a signal variation after processing, judges whether a person approaches or not through comparing the signal variation with the threshold value, and has more accurate detection distance of proximity induction after optimization.
In order to solve the technical problems, according to one aspect of the present utility model, the following technical solutions are provided:
a proximity sensor for dual detection of infrared illuminance, comprising:
the power supply module is used for detecting power supply by using a sensor;
the main control module is used for controlling the module;
the illumination detection module is used for detecting the illumination of the environment;
and the infrared receiving and transmitting module is used for transmitting and receiving infrared rays.
As a preferable scheme of the proximity sensor for dual detection of infrared illuminance, the main control module is electrically connected with the illuminance detection module and the infrared transceiver module respectively.
As a preferable scheme of the proximity sensor for dual detection of infrared illuminance, the main control module comprises: the device comprises a main control chip, a download interface circuit, a reset circuit and a filter circuit.
As a preferable scheme of the proximity sensor for dual detection of infrared illuminance, the power supply module comprises an LDO linear voltage stabilizing chip;
the power module supplies power to the main control module, the illuminance detection module and the infrared receiving and transmitting module.
As a preferable scheme of the proximity sensor for dual detection of infrared illuminance, the illuminance detection module comprises a digital illuminance detection sensor chip;
the illuminance detection sensor chip reads the illuminance value through the IC interface.
As a preferable scheme of the proximity sensor for dual detection of infrared illuminance, the infrared transceiver module comprises an infrared emitting diode and an infrared receiving diode.
Compared with the prior art, the utility model has the following beneficial effects:
the threshold value of infrared receiving is dynamically adjusted through the ambient light intensity to compensate the error of ambient light illumination to infrared measuring distance, the PWM control infrared transmitting tube is adopted to transmit infrared signals, the infrared reflected signals received by the infrared receiving diode are detected through ADC sampling, a signal variation is obtained after processing, whether a person approaches or not is judged through comparing the signal variation with the threshold value, and the detection distance of approach induction after optimization is more accurate.
When the infrared light source is specifically used, the power supply module converts an input 5V power supply into 3.3V power supply for the main control module, the illuminance detection module and the infrared receiving and transmitting module, the main control module is respectively and electrically connected with the illuminance detection module and the infrared receiving and transmitting module, the main control module detects the intensity of ambient light through the illuminance detection module and performs distance measurement through the infrared receiving and transmitting module, meanwhile, the threshold value of infrared receiving is dynamically adjusted through the ambient light intensity to compensate the error of ambient light illuminance on infrared measurement distance, the accurate distance measurement effect is achieved, the main control module controls the infrared transmitting tube to transmit infrared signals in a PWM mode, infrared reflection signals received by the infrared receiving diode are detected through ADC sampling, a signal variation is obtained after processing, and whether a person approaches is judged through comparing the signal variation with the threshold value.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following detailed description of the embodiments of the present utility model will be given with reference to the accompanying drawings, which are to be understood as merely some embodiments of the present utility model, and from which other drawings can be obtained by those skilled in the art without inventive faculty. Wherein:
FIG. 1 is a block diagram of the overall structure of the present utility model;
FIG. 2 is a circuit diagram of a main control chip in the present utility model;
FIG. 3 is a block diagram of a reset circuit according to the present utility model;
FIG. 4 is a diagram of a download interface circuit according to the present utility model;
FIG. 5 is a block diagram of a linear voltage stabilizing circuit according to the present utility model
FIG. 6 is a diagram of a filter circuit according to the present utility model;
FIG. 7 is a circuit diagram of an illuminance detection module according to the present utility model;
fig. 8 is a circuit configuration diagram of an infrared transceiver module according to the present utility model.
In the figure: 1. a power module; 2. a main control module; 3. an illuminance detection module; 4. and an infrared transceiver module.
Detailed Description
In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, but the present utility model may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present utility model is not limited to the specific embodiments disclosed below.
In the following detailed description of the embodiments of the present utility model, the cross-sectional view of the device structure is not partially enlarged to a general scale for the convenience of description, and the schematic is merely an example, which should not limit the scope of the present utility model. In addition, the three-dimensional dimensions of length, width and depth should be included in actual fabrication.
For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, embodiments of the present utility model will be described in further detail below with reference to the accompanying drawings.
The utility model provides a proximity sensor for dual detection of infrared illuminance, which dynamically adjusts the threshold value of infrared reception through the intensity of ambient illuminance to compensate the error of the ambient illuminance on the infrared measurement distance, adopts a PWM control infrared transmitting tube to transmit infrared signals, detects infrared reflection signals received by an infrared receiving diode through ADC sampling, obtains a signal variation after processing, judges whether a person approaches or not through comparing the signal variation with the threshold value, and has more accurate detection distance after optimization.
Fig. 1-8 are schematic views showing the overall structure of an embodiment of a proximity sensor for dual detection of infrared illuminance according to the present utility model, referring to fig. 1-8, the embodiment includes a proximity sensor for dual detection of infrared illuminance, which includes:
a proximity sensor for dual detection of infrared illuminance, comprising:
the power module 1 detects power supply by using a sensor;
when the LED lamp is specifically used, the power supply module 1 uses an LDO linear voltage stabilizing chip to convert an input 5V power supply into 3.3V for the main control module 2, the illuminance detection module 3 and the infrared receiving and transmitting module 4;
the main control module 2 is used for controlling the module;
the illumination detection module 3 is used for detecting the illumination of the environment;
the infrared transceiver module 4 is used for transmitting and receiving infrared rays;
when the infrared sensor is specifically used, the main control module 2 is respectively and electrically connected with the illuminance detection module 3 and the infrared receiving and transmitting module 4, the main control module 2 detects the intensity of ambient light through the illuminance detection module 3 and performs distance measurement through the infrared receiving and transmitting module 4, meanwhile, the threshold value of infrared receiving is dynamically adjusted through the ambient light intensity to compensate the error of the ambient light illuminance on the infrared measuring distance, the accurate distance measuring effect is achieved, the main control module 2 controls the infrared transmitting tube to transmit infrared signals in a PWM mode, infrared reflected signals received by the infrared receiving diode are detected through ADC sampling, a signal variation is obtained after processing, and whether a person approaches or not is judged through comparing the signal variation with the threshold value.
Although the utility model has been described hereinabove with reference to embodiments, various modifications thereof may be made and equivalents may be substituted for elements thereof without departing from the scope of the utility model. In particular, the features of the disclosed embodiments may be combined with each other in any manner as long as there is no structural conflict, and the exhaustive description of these combinations is not given in this specification merely for the sake of omitting the descriptions and saving resources. Therefore, it is intended that the utility model not be limited to the particular embodiment disclosed, but that the utility model will include all embodiments falling within the scope of the appended claims.
Claims (6)
1. A proximity sensor for dual detection of infrared illuminance, comprising:
a power supply module (1) for detecting power supply by a sensor;
the main control module (2) is used for controlling the module;
the illumination detection module (3) is used for detecting the ambient illumination;
and the infrared transceiver module (4) is used for transmitting and receiving infrared rays.
2. The proximity sensor for dual detection of infrared illuminance according to claim 1, wherein the main control module (2) is electrically connected to the illuminance detection module (3) and the infrared transceiver module (4), respectively.
3. The proximity sensor for dual detection of infrared illuminance according to claim 2, wherein the main control module (2) comprises: the device comprises a main control chip, a download interface circuit, a reset circuit and a filter circuit.
4. A proximity sensor for dual detection of infrared illuminance according to claim 3, wherein the power module (1) comprises an LDO linear voltage regulator chip;
the power supply module (1) supplies power to the main control module (2), the illuminance detection module (3) and the infrared receiving and transmitting module (4).
5. The proximity sensor for dual detection of infrared illuminance according to claim 4, wherein the illuminance detection module (3) comprises a digital illuminance detection sensor chip;
the illuminance detection sensor chip reads the illuminance value through the IC interface.
6. The proximity sensor for dual detection of infrared illuminance according to claim 5, wherein the infrared transceiver module (4) comprises an infrared emitting diode and an infrared receiving diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321418918.9U CN220040783U (en) | 2023-06-06 | 2023-06-06 | Proximity sensor for infrared illuminance dual detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321418918.9U CN220040783U (en) | 2023-06-06 | 2023-06-06 | Proximity sensor for infrared illuminance dual detection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220040783U true CN220040783U (en) | 2023-11-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321418918.9U Active CN220040783U (en) | 2023-06-06 | 2023-06-06 | Proximity sensor for infrared illuminance dual detection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220040783U (en) |
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2023
- 2023-06-06 CN CN202321418918.9U patent/CN220040783U/en active Active
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