CN113932928B - Pyroelectric infrared digital sensor capable of setting parameters - Google Patents
Pyroelectric infrared digital sensor capable of setting parameters Download PDFInfo
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- CN113932928B CN113932928B CN202111194491.4A CN202111194491A CN113932928B CN 113932928 B CN113932928 B CN 113932928B CN 202111194491 A CN202111194491 A CN 202111194491A CN 113932928 B CN113932928 B CN 113932928B
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- 239000000919 ceramic Substances 0.000 claims abstract description 31
- 238000001914 filtration Methods 0.000 claims abstract description 14
- 239000002184 metal Substances 0.000 claims abstract description 8
- 239000000758 substrate Substances 0.000 claims description 12
- 238000012790 confirmation Methods 0.000 claims description 8
- 230000035945 sensitivity Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 230000008569 process Effects 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
- 238000010276 construction Methods 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
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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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 filtering lens, a metal shell, a ceramic sensing piece, 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 sensing piece 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 be used for adjusting output sensitivity, can continuously confirm the frequency setting, can resist different environment interference signals, can be used for matching different ceramic sensing plates by setting different numerical impedances, 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 a thermal signal emitted by a human body or an animal with the temperature similar to that of the human body through an infrared sensitive element, conducts the thermal signal, filters the thermal signal through a signal processing circuit, amplifies the thermal signal and converts the thermal signal into a weak electrical signal. At present, the application of human body pyroelectric infrared induction control technology is more and more widespread, and in many occasions, many household and commercial electrical appliances have the need of increasing human body induction control functions. Such as air conditioning equipment, heating equipment such as electric heaters, 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 regulated and controlled by adding an MCU in the operation of the MCU, but the cost is increased. Some parameters cannot be adjusted. Therefore, the pyroelectric infrared digital sensor with the settable parameters can be arranged at will by an external main control chip.
Disclosure of Invention
Aiming at the situation, in order to overcome the defects of the prior art, the invention provides the pyroelectric infrared digital sensor which can be used for adjusting the output sensitivity, can continuously confirm the frequency setting, can resist different environment interference signals, can be used for matching different ceramic sensing plates by setting different numerical impedances, 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 filtering lens, a metal shell, a ceramic sensing piece, a signal acquisition chip, a circuit board and a pin group, wherein the metal shell comprises a substrate and a tube cap, the filtering lens is arranged on the upper surface of the tube cap, the filtering lens is used for transmitting infrared rays, the substrate is connected with the bottom of the tube cap, a storage cavity is formed between the tube cap and the substrate, the ceramic sensing piece, the signal acquisition chip and the circuit board are connected in the storage cavity, the ceramic sensing piece is used for detecting infrared signals of a human body, the signal acquisition chip is used for acquiring signals output by the ceramic sensing piece and transmitting the signals to the circuit board, and the pin group is connected with the bottom of the substrate.
Further, 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 sensing piece 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 of 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.
Further, 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 sensing piece, wherein each bit of data corresponds to different parameters, and when the chip inside the ceramic sensing piece receives the data, the chip correspondingly adjusts;
the 1 st to 10 th bit data in the received 24 bit data is used as a threshold value, the size of the data is compared with the threshold value after the analog-digital converter collects and converts the data into the data, and if the data exceeds the threshold value, the data is judged to have a trigger signal;
through setting the number of times of acknowledgement of 11 th to 12 th bit data in the received 24 bit data, 1 time of acknowledgement, 2 times of continuous acknowledgement, 4 times of continuous acknowledgement and 8 times of continuous acknowledgement can be respectively set, and when the trigger signal has the number of times of acknowledgement which accords with the set number of times, the trigger signal is judged to be an effective trigger signal, so that the anti-interference capability can be improved;
the high-pass filter can be set to be 0.44Hz or 0.53Hz by setting the 13 th bit data in the received 24 bit data as a high-pass filter, and the low-pass filter can be set to be 0.7Hz or 0.9Hz by setting the 14 th bit data in the received 24 bit data as a low-pass filter, so that different environment interference signals can be resisted;
by setting the 15 th to 16 th bit data in the received 24 th bit data as input impedance, 4 different impedances can be set for matching different ceramic sensing pieces.
Further, the pin group comprises a power supply positive electrode pin, a power supply negative electrode pin, a data output pin and a data input pin, the signal acquisition chip is provided with 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 is provided with a bonding pad for power supply input and output, and the bonding pad is respectively connected with the power supply positive electrode pin and the power supply negative electrode pin.
Preferably, the filter lens is rectangular.
Further, the ceramic sensing piece is a pyroelectric infrared human body sensing sensor.
The beneficial effects obtained by the invention by adopting the structure are as follows: according to the pyroelectric infrared digital sensor with the settable parameters, the sensitivity can be output for adjustment, the setting of times can be confirmed continuously, the settable high-pass filter is 0.44Hz or 0.53Hz, the settable low-pass filter is 0.7Hz or 0.9Hz, different environment interference signals can be resisted, and the sensor can be used for matching different ceramic sensing plates by setting different numerical impedances.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a pyroelectric infrared digital sensor with settable parameters according to the present invention;
FIG. 2 is a schematic diagram of a pyroelectric infrared digital sensor with parameters capable of being set according to the present invention;
FIG. 3 is a serial data format of input of a pyroelectric infrared digital sensor with parameters settable according to the present invention.
The LED display device comprises a light filtering lens, a metal shell, a power supply anode pin, a power supply cathode pin, a data output pin, a data input pin and a data output pin, wherein the light filtering lens is arranged at the bottom of the light filtering lens, the light filtering lens is arranged.
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention; all other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1-3, the pyroelectric infrared digital sensor capable of setting parameters comprises a filtering lens 1, a metal shell 2, a ceramic sensing chip, a signal acquisition chip, a circuit board and a pin group, wherein the metal shell 2 comprises a substrate and a tube cap, the filtering lens 1 is arranged on the upper surface of the tube cap, the filtering lens 1 is used for transmitting infrared rays, the substrate is connected with the bottom of the tube cap, a storage cavity is formed between the tube cap and the substrate, the ceramic sensing chip, the signal acquisition chip and the circuit board are connected and arranged in the storage cavity, the ceramic sensing chip is used for detecting infrared signals of a human body, the signal acquisition chip is used for acquiring signals output by the ceramic sensing chip and transmitting the signals to the circuit board, and the pin group is connected with 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 sensing piece 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 of 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, the signal acquisition chip is provided with bonding pads for data input and output, the bonding pads are respectively connected with the data input pin 6 and the data output pin 5, the reference voltage unit is provided with bonding pads for power supply input and output, and the bonding pads are respectively connected with the power supply anode pin 3 and the power supply cathode pin 4.
In an embodiment, 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 sensing chip, wherein each bit of data corresponds to different parameters, and when the chip inside the ceramic sensing chip receives the data, the chip correspondingly adjusts the data;
the 1 st to 10 th bit data in the received 24 bit data is used as a threshold value, the size of the data is compared with the threshold value after the analog-digital converter collects and converts the data into the data, and if the data exceeds the threshold value, the data is judged to have a trigger signal;
through setting the number of times of acknowledgement of 11 th to 12 th bit data in the received 24 bit data, 1 time of acknowledgement, 2 times of continuous acknowledgement, 4 times of continuous acknowledgement and 8 times of continuous acknowledgement can be respectively set, and when the trigger signal has the number of times of acknowledgement which accords with the set number of times, the trigger signal is judged to be an effective trigger signal, so that the anti-interference capability can be improved;
the high-pass filter can be set to be 0.44Hz or 0.53Hz by setting the 13 th bit data in the received 24 bit data as a high-pass filter, and the low-pass filter can be set to be 0.7Hz or 0.9Hz by setting the 14 th bit data in the received 24 bit data as a low-pass filter, so that different environment interference signals can be resisted;
by setting the 15 th to 16 th bit data in the received 24 th bit data as input impedance, four different impedances can be set for matching different ceramic sensing pieces.
It is noted that relational terms such as first and second, and the like are 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. Moreover, 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 understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
The invention and its embodiments have been described above with no limitation, and the actual construction is not limited to the embodiments of the invention as shown in the drawings. In summary, if one of ordinary skill in the art is informed by this disclosure, a structural manner and an embodiment similar to the technical solution should not be creatively devised without departing from the gist of the present invention.
Claims (1)
1. The utility model provides a pyroelectric infrared digital sensor of settable parameter which characterized in that: the infrared sensor comprises a light filtering lens, a metal shell, a ceramic sensing piece, a signal acquisition chip, a circuit board and a pin group, wherein the metal shell comprises a substrate and a tube cap, the light filtering lens is arranged on the upper surface of the tube cap and is used for transmitting infrared rays, the substrate is connected with the bottom of the tube cap, a storage cavity is formed between the tube cap and the substrate, the ceramic sensing piece, the signal acquisition chip and the circuit board are connected and arranged in the storage cavity, the ceramic sensing piece 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 sensing piece and transmitting the signals to the circuit board, and the pin group is connected with the bottom of the substrate;
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 sensing piece 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 of 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;
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 sensing piece, wherein each bit of data corresponds to different parameters, and when the chip inside the ceramic sensing piece receives the data, the chip correspondingly adjusts;
the 1 st to 10 th bit data in the received 24 bit data is used as a threshold value, the size of the data is compared with the threshold value after the analog-digital converter collects and converts the data into the data, and if the data exceeds the threshold value, the data is judged to have a trigger signal;
setting the number of times of confirmation by 11 th to 12 th bit data in the received 24 bit data, respectively setting 1 time of confirmation, 2 times of continuous confirmation, 4 times of continuous confirmation and 8 times of continuous confirmation, and judging the trigger signal as an effective trigger signal when the trigger signal has the number of times of confirmation which accords with the set number of times of confirmation;
setting a high-pass filter to be 0.44Hz or 0.53Hz by using 13 th bit data in the received 24 bit data, and setting a low-pass filter to be 0.7Hz or 0.9Hz by using 14 th bit data in the received 24 bit data;
the 15 th to 16 th bit data in the received 24 bit data can be set to be 50G omega, 75G omega, 100G omega and 200G omega by taking the 15 th to 16 th bit data as input impedance setting, and are used for matching different ceramic sensing plates;
the pin group comprises a power supply positive electrode pin, a power supply negative electrode pin, a data output pin and a data input pin, the signal acquisition chip is provided with 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 is provided with a bonding pad for power supply input and output, and the bonding pad is respectively connected with the power supply positive electrode pin and the power supply negative electrode pin;
the filter lens is rectangular;
the ceramic sensing piece is a pyroelectric infrared human body sensing sensor.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2446517Y (en) * | 2000-09-14 | 2001-09-05 | 上海尼赛拉传感器有限公司 | Miniature pyroelectric infrared sensor |
| 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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- 2021-10-13 CN CN202111194491.4A patent/CN113932928B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2446517Y (en) * | 2000-09-14 | 2001-09-05 | 上海尼赛拉传感器有限公司 | Miniature pyroelectric infrared sensor |
| 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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