CN113932928A - Pyroelectric infrared digital sensor capable of setting parameters - Google Patents
Pyroelectric infrared digital sensor capable of setting parameters Download PDFInfo
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- CN113932928A CN113932928A CN202111194491.4A CN202111194491A CN113932928A CN 113932928 A CN113932928 A CN 113932928A CN 202111194491 A CN202111194491 A CN 202111194491A CN 113932928 A CN113932928 A CN 113932928A
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- 239000000919 ceramic Substances 0.000 claims abstract description 31
- 230000006698 induction Effects 0.000 claims abstract description 27
- 239000002184 metal Substances 0.000 claims abstract description 8
- 238000012790 confirmation Methods 0.000 claims description 15
- 239000000758 substrate Substances 0.000 claims description 9
- 230000008054 signal transmission Effects 0.000 claims 1
- 230000007613 environmental effect Effects 0.000 abstract description 5
- 230000035945 sensitivity Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 241001465754 Metazoa Species 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/10—Radiation pyrometry, e.g. infrared or optical thermometry using electric radiation detectors
- G01J5/34—Radiation pyrometry, e.g. infrared or optical thermometry using electric radiation detectors using capacitors, e.g. pyroelectric capacitors
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V8/00—Prospecting or detecting by optical means
- G01V8/10—Detecting, e.g. by using light barriers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
The invention discloses a pyroelectric infrared digital sensor capable of setting parameters, which comprises a filter lens, a metal shell, a ceramic induction sheet, a signal acquisition chip, a circuit board and a pin group, wherein a microcontroller, a high-low pass filter and an analog-digital converter are integrated on the circuit board, the microcontroller comprises an internal clock unit and a reference voltage unit, and the ceramic induction sheet and the signal acquisition chip are combined into a digital logic unit. The invention belongs to the technical field of infrared sensors, and particularly provides a pyroelectric infrared digital sensor which can output sensitivity adjustment, can continuously confirm the frequency setting, can resist different environmental interference signals, can be used for matching different ceramic induction sheets by setting impedances with different numerical values, and is convenient to use and capable of setting parameters.
Description
Technical Field
The invention belongs to the technical field of infrared sensors, and particularly relates to a pyroelectric infrared digital sensor capable of setting parameters.
Background
The pyroelectric infrared sensor is a heat-sensitive sensor which senses heat signals emitted by a human body or an animal with the temperature close to that of the human body through an infrared sensitive element, conducts the heat signals, filters the heat signals through a signal processing circuit, amplifies the heat signals and converts the heat signals into weak electric signals. At present, the application of human body pyroelectric infrared induction control technology is more and more extensive, and under many occasions, many household and commercial electrical equipment all have the needs of increasing human body induction control function. For example, air conditioning equipment, heating equipment such as an electric heater, monitoring camera equipment, lighting equipment and the like.
For different use environments, different parameters need to be set, such as sensitivity, continuous confirmation times, high-low pass filtering range, input impedance and the like, and the parameters can achieve the best use effect through reasonable adjustment. In the past, some parameters can be adjusted and controlled in the operation of the MCU through the addition of the MCU, but the cost is increased. Some parameters cannot be adjusted. Therefore, the pyroelectric infrared digital sensor with the settable parameters is provided, and an external main control chip can be set at will.
Disclosure of Invention
In view of the above situation, in order to overcome the defects of the prior art, the invention provides the pyroelectric infrared digital sensor which can output sensitivity adjustment, continuously confirm the frequency setting, resist different environmental interference signals, can be used for matching different ceramic induction sheets by setting impedances with different values, and is convenient to use and capable of setting parameters.
The technical scheme adopted by the invention is as follows: the invention discloses a pyroelectric infrared digital sensor capable of setting parameters, which comprises a filter lens, a metal shell, a ceramic induction sheet, a signal acquisition chip, a circuit board and a pin group, wherein the metal shell comprises a substrate and a pipe cap, the filter lens is arranged on the upper surface of the pipe cap and used for transmitting infrared rays, the substrate is connected with the bottom of the pipe cap, a storage cavity is formed between the pipe cap and the substrate, the ceramic induction sheet, the signal acquisition chip and the circuit board are connected and arranged in the storage cavity, the ceramic induction sheet is used for detecting infrared signals of a human body, the signal acquisition chip is used for acquiring and receiving signals output by the ceramic induction sheet and sending the signals to the circuit board, and the pin group is connected and arranged at the bottom of the substrate.
Furthermore, a microcontroller, a high-low pass filter and an analog-digital converter (ADC) are integrated on the circuit board, the microcontroller comprises an internal clock unit and a reference voltage unit, the ceramic induction sheet and the signal acquisition chip are combined into a digital logic unit, a differential input positive terminal and a differential input negative terminal are respectively led out from the high-low pass filter, the analog-digital converter is connected with the high-low pass filter, the digital logic unit is respectively connected with the analog-digital converter and the high-low pass filter, the analog-digital converter outputs converted signals to the digital logic unit, the internal clock unit is connected with the high-low pass filter, and the reference voltage unit is connected with the analog-digital converter.
Furthermore, the digital logic unit receives the signal output of the external main control chip, and the external main control chip can output 24-bit serial data to the input pin of the ceramic induction sheet, wherein each bit of data corresponds to different parameters, and when the chip in the ceramic induction sheet receives the data, the chip correspondingly adjusts the data;
the data of 1 st to 10 th bits in the received 24 bits of data is used as a threshold value, when the data is acquired and converted by an analog-digital converter, the data is compared with the threshold value, and if the data exceeds the threshold value, a trigger signal is judged to exist;
the data of 11 th to 12 th bits in the received 24 bits are set for confirming times, and 1 time of confirmation, 2 times of continuous confirmation, 4 times of continuous confirmation and 8 times of continuous confirmation can be respectively set, and when the trigger signal has the confirming times which are consistent with the set times, the trigger signal is judged to be an effective trigger signal, so that the anti-interference capability can be improved;
setting a high-pass filter to be 0.44Hz or 0.53Hz by using the 13 th bit data in the received 24-bit data, setting a low-pass filter to be 0.7Hz or 0.9Hz by using the 14 th bit data in the received 24-bit data, and resisting different environmental interference signals;
4 different impedances can be set by setting the input impedance with the data of 15 th to 16 th out of the received 24 th data, and the impedance can be used for matching different ceramic induction sheets.
Furthermore, the pin group comprises a power supply anode pin, a power supply cathode pin, a data output pin and a data input pin, the signal acquisition chip comprises a bonding pad for data input and output, the bonding pad is respectively connected with the data input pin and the data output pin, the reference voltage unit comprises a bonding pad for power supply input and output, and the bonding pad is respectively connected with the power supply anode pin and the power supply cathode pin.
Preferably, the filter lens is arranged in a rectangular shape.
Further, the ceramic induction sheet is a pyroelectric infrared human body induction sensor.
The invention with the structure has the following beneficial effects: the pyroelectric infrared digital sensor with the settable parameters can output sensitivity adjustment, can continuously confirm the times set, can set a high-pass filter to be 0.44Hz or 0.53Hz, can set a low-pass filter to be 0.7Hz or 0.9Hz, can resist different environmental interference signals, and can be used for matching different ceramic induction sheets by setting impedances with different numerical values.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a pyroelectric infrared digital sensor capable of setting parameters according to the invention;
FIG. 2 is a schematic structural diagram of a pyroelectric infrared digital sensor capable of setting parameters according to the present invention;
FIG. 3 is an input serial data format of a pyroelectric infrared digital sensor capable of setting parameters according to the present invention.
The device comprises a light filtering lens 1, a metal shell 2, a power supply anode pin 3, a power supply cathode pin 4, a power supply cathode pin 5, a data output pin 6 and a data input pin.
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments; all other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1-3, the pyroelectric infrared digital sensor capable of setting parameters of the invention comprises a filter lens 1, a metal shell 2, a ceramic sensor, a signal acquisition chip, a circuit board and a pin group, wherein the metal shell 2 comprises a substrate and a tube cap, the filter lens 1 is arranged on the upper surface of the tube cap, the filter lens 1 is used for transmitting infrared rays, the substrate is connected to the bottom of the tube cap, a storage cavity is arranged between the tube cap and the substrate, the ceramic sensor, the signal acquisition chip and the circuit board are connected to the storage cavity, the ceramic sensor is used for detecting infrared signals of a human body, the signal acquisition chip is used for acquiring and receiving signals output by the ceramic sensor and sending the signals to the circuit board, and the pin group is connected to the bottom of the substrate.
The circuit board is integrated with a microcontroller, a high-low pass filter and an analog-digital converter (ADC), the microcontroller comprises an internal clock unit and a reference voltage unit, the ceramic induction sheet and the signal acquisition chip are combined into a digital logic unit, a differential input positive end and a differential input negative end are respectively led out from the high-low pass filter, the analog-digital converter is connected with the high-low pass filter, the digital logic unit is respectively connected with the analog-digital converter and the high-low pass filter, the analog-digital converter outputs converted signals to the digital logic unit, the internal clock unit is connected with the high-low pass filter, and the reference voltage unit is connected with the analog-digital converter.
In addition, the pin group comprises a power supply anode pin 3, a power supply cathode pin 4, a data output pin 5 and a data input pin 6, a pad for data input and data output is arranged on the signal acquisition chip, the pad is respectively connected with the data input pin 6 and the data output pin 5, a pad for power supply input and output is arranged on the reference voltage unit, and the pad is respectively connected with the power supply anode pin 3 and the power supply cathode pin 4.
In the embodiment, the digital logic unit receives the signal output of the external main control chip, the external main control chip can output 24-bit serial data to the input pin of the ceramic induction sheet, wherein each bit of data corresponds to different parameters, and when the chip in the ceramic induction sheet receives the data, the chip correspondingly adjusts the data;
the data of 1 st to 10 th bits in the received 24 bits of data is used as a threshold value, when the data is acquired and converted by an analog-digital converter, the data is compared with the threshold value, and if the data exceeds the threshold value, a trigger signal is judged to exist;
the data of 11 th to 12 th bits in the received 24 bits are set for confirming times, and 1 time of confirmation, 2 times of continuous confirmation, 4 times of continuous confirmation and 8 times of continuous confirmation can be respectively set, and when the trigger signal has the confirming times which are consistent with the set times, the trigger signal is judged to be an effective trigger signal, so that the anti-interference capability can be improved;
setting a high-pass filter to be 0.44Hz or 0.53Hz by using the 13 th bit data in the received 24-bit data, setting a low-pass filter to be 0.7Hz or 0.9Hz by using the 14 th bit data in the received 24-bit data, and resisting different environmental interference signals;
four different impedances can be set by setting the input impedance with the data of 15 th to 16 th out of the received 24 th data, and the four different impedances are used for matching different ceramic induction sheets.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
The present invention and its embodiments have been described above, and the description is not intended to be limiting, and the drawings are only one embodiment of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. The pyroelectric infrared digital sensor capable of setting parameters is characterized in that: constitute including filter lens, metal casing, ceramic response piece, signal acquisition chip, circuit board and pin group, metal casing includes base plate and pipe cap, the upper surface of pipe cap is located to the filter lens, the filter lens is used for transmitting the infrared ray, the bottom of pipe cap is located to the substrate connection, just include between pipe cap and the base plate and store the chamber, ceramic response piece, signal acquisition chip, circuit board are connected and are located and store the intracavity, the ceramic response piece is used for surveying human infrared signal, the signal acquisition chip is used for gathering the signal of receiving ceramic response piece output to with this signal transmission to the circuit board, the bottom of base plate is located in the pin group link.
2. The pyroelectric infrared digital sensor capable of setting parameters as claimed in claim 1, wherein: the circuit board is integrated with a microcontroller, a high-low pass filter and an analog-digital converter, the microcontroller comprises an internal clock unit and a reference voltage unit, the ceramic induction sheet and the signal acquisition chip are combined into a digital logic unit, a differential input positive end and a differential input negative end are respectively led out from the high-low pass filter, the analog-digital converter is connected with the high-low pass filter, the digital logic unit is respectively connected with the analog-digital converter and the high-low pass filter, the analog-digital converter outputs converted signals to the digital logic unit, the internal clock unit is connected with the high-low pass filter, and the reference voltage unit is connected with the analog-digital converter.
3. The pyroelectric infrared digital sensor capable of setting parameters as claimed in claim 2, wherein: the digital logic unit receives the signal output of the external main control chip, the external main control chip can output 24-bit serial data to an input pin of the ceramic induction sheet, wherein each bit of data corresponds to different parameters, and when the chip in the ceramic induction sheet receives the data, the chip correspondingly adjusts the data;
the data of 1 st to 10 th bits in the received 24 bits of data is used as a threshold value, when the data is acquired and converted by an analog-digital converter, the data is compared with the threshold value, and if the data exceeds the threshold value, a trigger signal is judged to exist;
setting the number of confirmation times through the 11 th to 12 th data in the received 24 th data, wherein 1 confirmation, 2 continuous confirmations, 4 continuous confirmations and 8 continuous confirmations can be respectively set, and when the trigger signal has the confirmation times which are consistent with the set number, the trigger signal is judged to be a valid trigger signal;
setting a high-pass filter to be 0.44Hz or 0.53Hz by setting a high-pass filter for the 13 th bit data in the received 24-bit data, and setting a low-pass filter to be 0.7Hz or 0.9Hz by setting a low-pass filter for the 14 th bit data in the received 24-bit data;
4 different impedances can be set by setting the input impedance with the data of 15 th to 16 th out of the received 24 th data, and the impedance can be used for matching different ceramic induction sheets.
4. The pyroelectric infrared digital sensor capable of setting parameters as claimed in claim 2, wherein: the lead group comprises a power supply anode pin, a power supply cathode pin, a data output pin and a data input pin, a bonding pad for data input and output is arranged on the signal acquisition chip and is respectively connected with the data input pin and the data output pin, a bonding pad for power supply input and output is arranged on the reference voltage unit, and the bonding pad is respectively connected with the power supply anode pin and the power supply cathode pin.
5. The pyroelectric infrared digital sensor capable of setting parameters as claimed in claim 1, wherein: the filter lens is arranged in a rectangular shape.
6. The pyroelectric infrared digital sensor capable of setting parameters as claimed in claim 1, wherein: the ceramic induction sheet is a pyroelectric infrared human body induction sensor.
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| CN202111194491.4A CN113932928B (en) | 2021-10-13 | 2021-10-13 | Pyroelectric infrared digital sensor capable of setting parameters |
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| CN202111194491.4A CN113932928B (en) | 2021-10-13 | 2021-10-13 | Pyroelectric infrared digital sensor capable of setting parameters |
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| CN113932928B CN113932928B (en) | 2024-03-29 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117848534A (en) * | 2024-03-05 | 2024-04-09 | 无锡众测传感器技术有限公司 | Thermosensitive sensor, pin processing mechanism and detection device |
| CN117848534B (en) * | 2024-03-05 | 2024-05-31 | 无锡众测传感器技术有限公司 | Thermosensitive sensor, pin processing mechanism and detection device |
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| CN201035160Y (en) * | 2007-01-23 | 2008-03-12 | 张亦翔 | Difference output passive infrared double-inspected prober of bi-heat electric-dispelling infrared sensor |
| CN205879369U (en) * | 2016-06-27 | 2017-01-11 | 南阳森霸光电股份有限公司 | Pyroelectric infrared sensor based on programmable chip |
| CN107664535A (en) * | 2017-11-03 | 2018-02-06 | 苏州华芯微电子股份有限公司 | Human body sensing chip for infrared thermal release electric |
| CN210198573U (en) * | 2019-07-29 | 2020-03-27 | 中电科技德清华莹电子有限公司 | Intelligent pyroelectric infrared sensor |
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2021
- 2021-10-13 CN CN202111194491.4A patent/CN113932928B/en active Active
Patent Citations (5)
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| CN2446517Y (en) * | 2000-09-14 | 2001-09-05 | 上海尼赛拉传感器有限公司 | Miniature pyroelectric infrared sensor |
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| CN205879369U (en) * | 2016-06-27 | 2017-01-11 | 南阳森霸光电股份有限公司 | Pyroelectric infrared sensor based on programmable chip |
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