CN108388178A - A kind of full angle infrared identification device - Google Patents
A kind of full angle infrared identification device Download PDFInfo
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- CN108388178A CN108388178A CN201810194567.5A CN201810194567A CN108388178A CN 108388178 A CN108388178 A CN 108388178A CN 201810194567 A CN201810194567 A CN 201810194567A CN 108388178 A CN108388178 A CN 108388178A
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- 238000012545 processing Methods 0.000 claims abstract description 45
- 230000001681 protective effect Effects 0.000 claims abstract description 18
- 238000003860 storage Methods 0.000 claims abstract description 7
- 238000012544 monitoring process Methods 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 238000004422 calculation algorithm Methods 0.000 claims description 5
- 238000009826 distribution Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims 1
- 238000009434 installation Methods 0.000 abstract 1
- 238000001514 detection method Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000003491 array Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000004556 brain Anatomy 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
-
- 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
- G01J5/0022—Radiation pyrometry, e.g. infrared or optical thermometry for sensing the radiation of moving bodies
- G01J5/0025—Living bodies
-
- 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
-
- 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
- G01J2005/0077—Imaging
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/24—Pc safety
- G05B2219/24215—Scada supervisory control and data acquisition
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
Abstract
The invention discloses a kind of full angle infrared identification device, including signal acquisition and processing apparatus, infrared sensor array is fixed on the upper surface of objective table and is uniformly distributed in the surrounding of objective table, and infrared sensor array is electrically connected with signal-processing board by the first cable；Including rotating platform; objective table is located at the upper end of rotating platform; the bottom of objective table is equipped with the groove of cuboid, and motor is located at the underface of groove, and the shaft of motor matches groove; the shaft of motor is rotatablely connected with objective table; motor is electrically connected with signal-processing board by the second cable, and motor is additionally provided with protective cover, and motor is perpendicularly fixed at the upper surface of the bottom of protective cover by first support; the lower surface of protective cover is equipped with second support, and second support is fixed on ground；Further include display storage device, is made of display screen and host computer；It further include power supply unit.The infrared identification device identification range of the present invention is wide, identification distance is remote, discrimination is high, installation site is flexible.
Description
Technical field
The present invention relates to infrared identification equipment technical fields, more particularly to a kind of full angle infrared identification device.
Background technology
Infrared recognition technique plays an important role in daily life.Such as：Automatically-controlled door, when people are close to automatically-controlled door,
Infrared sensor is by incuding the microwave or temperature that human body distributes, to trigger door opening action；In another example lavatory hand drier,
Operation principle is similar with automatically-controlled door.Both the above infrared identification device is found everywhere in life, its shortcoming is that, infrared identification
Narrow range, apart from short.It can be used for identifying people with infrared recognition technique at present, such as：Chinese patent 201611125413.8
A kind of method of counting and device based on infrared array number sensor are disclosed, method is red above doorway to being set to
The output signal of outer sensor array is handled, and identifies the profile generated by human body, and carry out to the direction of motion of profile
Tracking judges it is still outgoing whether personnel enter, to realize that disengaging personnel count by the movement locus of profile；It counts dress
It sets including SCM system and coupled infrared sensor array, pir sensor and power circuit, SCM system is logical
The infrared image that infrared sensor array obtains detection zone is crossed, has detected whether personnel by doorway by pir sensor.To the greatest extent
It manages the invention and improves the accuracy of identification, low in energy consumption of multiple target tracking, but exist simultaneously problems with：
One, target detection narrow range can not cover 360 ° of panoramic view regions；
Two, target detection identification is apart from short；
Three, infrared sensor array pixel is relatively low, and infrared identification is unstable；
Four, the object height of target detection identification is restricted, and cannot detect earth's surface.
In order to overcome drawbacks described above, the positive innovation research of those skilled in the art infrared to create a kind of full angle
Identification device.
Invention content
In view of the problems of the existing technology, the present invention provides a kind of full angle infrared identification device, the device is used
Afterwards, under the action of rotating platform, the region of infrared sensor array identification increases to 360 ° of field angles, and infrared identification distance
Become larger, reliability raising, target identification can also be carried out for short and small biology.
In order to solve the above technical problems, one aspect of the present invention is：A kind of full angle infrared identification is provided
Device, described device include signal acquisition and processing apparatus, are fixed on the rotating platform on ground, show that storage device and power supply are set
It is standby；
The signal acquisition and processing apparatus includes infrared sensor array, signal-processing board and the first cable, described infrared
Sensor array is fixed on the upper surface of the objective table of the rotating platform and is uniformly distributed in the surrounding of the objective table, described
Infrared sensor array is electrically connected with the signal-processing board by the first cable, and the signal-processing board is equipped with signal processing
Chip, program download interface and data monitoring interface；
The rotating platform includes the objective table and motor, and the objective table is located at the upper end of the rotating platform, institute
The bottom for stating objective table is equipped with the groove of cuboid, and the motor is located at the underface of the groove, the shaft of the motor
With the groove, the shaft of the motor and the objective table are rotatablely connected, and the motor and the signal-processing board pass through the
Two cables are electrically connected, and the motor is equipped with protective cover, and the motor is perpendicularly fixed at the bottom of the protective cover by first support
The lower surface of the upper surface in portion, the protective cover is equipped with second support, and the second support is fixed on ground；
The display storage device includes display screen and host computer, and the display screen is electrically connected with the host computer,
One end of serial ports conversion module is electrically connected with the host computer, the other end and the data monitoring of the serial ports conversion module
Interface is electrically connected；
The power supply unit includes accumulator, and one end of button box is electrically connected with the accumulator by third cable, institute
The other end for stating button box is electrically connected with the signal-processing board by the 4th cable.
It further says, the quantity of the infrared sensor array is four, and each infrared sensor array is in institute
It is 90 degree to state the distribution angle on the circumference of objective table.
It further says, the infrared sensor array is the infrared battle array of the MLX90621 series of Melexis companies production
Sensor, the infrared sensor array are configured to 16*4 pixels, 120 ° of * 25 ° of field angles.
It further says, the upper surface of the objective table and the vertical range on ground are 50cm.
It further says, the motor is DC brushless motor, and the operating voltage of the motor is direct current 3.3V.
It further says, the voltage of the accumulator is direct current 5V.
It further says, 430 Fr2310 of signal processing chip model MSP, the signal processing chip includes
Infrared identification algorithm.
Further to say, first cable includes that power cord, ground wire, signal receive line and signal and send line, and described the
Two cables, the third cable and the 4th cable all include power and ground.
It further says, the height of the second support can up and down adjustment.
The beneficial effects of the invention are as follows：
One, rotating platform includes objective table and motor, and objective table is located at the upper end of the rotating platform, the bottom of objective table
Groove equipped with cuboid, groove are arranged right below motor, and the shaft of motor matches groove, and shaft and the objective table of motor turn
Dynamic connection, motor are electrically connected with signal-processing board by the second cable, and motor is equipped with protective cover, and motor is vertical by first support
It is fixed on the upper surface of the bottom of protective cover, the lower surface of protective cover is equipped with second support, and the second support is fixed on ground,
Four infrared sensor arrays are fixed on the surrounding of objective table with 90 ° of even angles respectively, and loading is driven by the shaft of motor
Platform rotates, and realizes 360 ° of full visual field target detections of infrared sensor array, increases infrared identification range；
Two, it is fixed on objective table using four infrared sensor arrays, is held by the shaft band dynamic object stage of motor
Row high speed rotation improves infrared identification accuracy rate using brshless DC motor, it can be achieved that high speed stablizes identification, reduces rate of false alarm；
Three, the infrared array sensing for the MLX90621 series that infrared sensor array is produced using Melexis companies
Device, the infrared sensor array are configured to 16*4 pixels, increase infrared identification distance, improve infrared identification rate；
Four, the upper surface of objective table is set as 50cm at a distance from ground, and the field angle of the infrared sensor array is
120 ° * 25 °, the height of second support can up and down adjustment, can effectively identify the short and small biology of earth's surface, position height is flexibly adjustable.
Above description is only the general introduction of technical solution of the present invention, in order to better understand the technical means of the present invention,
And can be implemented in accordance with the contents of the specification, below with presently preferred embodiments of the present invention and after coordinating attached drawing to be described in detail such as.
Description of the drawings
Fig. 1 is the structural schematic diagram of the present invention；
Fig. 2 is the control principle drawing of the present invention；
Each section label is as follows in attached drawing：
Infrared sensor array 1, signal-processing board 2, the first cable 3, objective table 4, signal processing chip 5, program are downloaded
Interface 6, data monitoring interface 7, motor 8, groove 9, the shaft 10 of motor, the second cable 11, protective cover 12, first support 13,
Second support 14, display screen 15, host computer 16, serial ports conversion module 17, accumulator 18, button box 19,20 and of third cable
4th cable 21.
Specific implementation mode
Illustrate that the specific implementation mode of the present invention, those skilled in the art can be by these below by way of particular specific embodiment
The revealed content of specification understands advantages of the present invention and effect easily.The present invention can also other different modes give
Implement, that is, under the scope of without departing substantially from disclosed, different modification and change can be given.
Embodiment：A kind of full angle infrared identification device, as depicted in figs. 1 and 2, described device includes signal acquisition process
Device, the rotating platform for being fixed on ground, display storage device and power supply unit；
The signal acquisition and processing apparatus includes infrared sensor array 1, signal-processing board 2 and the first cable 3, described red
Outer sensor array is fixed on the upper surface of the objective table 4 of the rotating platform and is uniformly distributed in the surrounding of the objective table,
The infrared sensor array is electrically connected with the signal-processing board by the first cable, and the signal-processing board is equipped with signal
Processing chip 5, program download interface 6 and data monitoring interface 7；
The rotating platform includes the objective table and motor 8, and the objective table is located at the upper end of the rotating platform, institute
The bottom for stating objective table is equipped with the groove 9 of cuboid, and the motor is located at the underface of the groove, the shaft 10 of the motor
The groove is matched, the shaft of the motor is rotatablely connected with the objective table, and the motor passes through with the signal-processing board
Second cable 11 is electrically connected, and the motor is equipped with protective cover 12, and the motor is perpendicularly fixed at the guarantor by first support 13
The lower surface of the upper surface of the bottom of shield, the protective cover is equipped with second support 14, and the second support is fixed on ground；
The display storage device includes display screen 15 and host computer 16, and the display screen is electrically connected with the host computer
It connects, one end of serial ports conversion module 17 is electrically connected with the host computer, the other end and the number of the serial ports conversion module
According to monitoring interface electrical connection；
The power supply unit includes accumulator 18, and one end of button box 19 is electrically connected with the accumulator by third cable 20
It connects, the other end of the button box is electrically connected with the signal-processing board by the 4th cable 21.
The quantity of the infrared sensor array is four, and each infrared sensor array is in the rotating platform
Distribution angle on circumference is 90 degree.
The infrared sensor array is the infrared sensor array of the MLX90621 series of Melexis companies production, institute
That states infrared sensor array is configured to 16*4 pixels, 120 ° of * 25 ° of field angles.
The upper surface of the objective table and the vertical range on ground are 50cm.
The motor is DC brushless motor, and the operating voltage of the motor is direct current 3.3V.
The voltage of the accumulator is direct current 5V.
430 Fr 2310 of signal processing chip model MSP, the signal processing chip include infrared identification calculation
Method.
First cable includes that power cord, ground wire, signal receive line and signal and send line, second cable, described
Third cable and the 4th cable all include power and ground.
The height of the second support can up and down adjustment.
The course of work and operation principle of the present invention is as follows：
First, the second support of full angle infrared identification device is fixed on ground, computer is injected at the ends USB of emulator
Host USB interface, the other end are connect with the program download interface on signal-processing board, using simulation software by infrared identification algorithm
It is burned onto in signal processing chip, after burning, extracts emulator；
Then, one end of serial ports conversion module is injected to the USB port of host computer, the other end injects on signal-processing board
Data monitoring interface opens the digital serial port assistant on computer, has configured soft hardware equipment port, baud rate, parity check bit
Etc. parameters, prepare for infrared identification data monitoring；
And then, the power knob on button box is pressed, accumulator direct current 5V voltages pass sequentially through third cable and the 4th
Cable is conveyed to signal-processing board, and signal-processing board is given to provide operating voltage, and the Voltage stabilizing module in signal-processing board is by direct current 5V
Power voltage step down is 3.3V normal working voltages, is supplied to DC brushless motor and infrared sensor array；
And then, motor and infrared sensor array are started to work, and the shaft rotating platform rotation of motor, infrared array passes
Sensor carries out 360 ° of full angles and captures identification, at this time in signal processing chip under the action of the high speed rotation of rotating platform
Human body or things are divided into 64 test sites by the pixel that infrared identification algorithm senses 16*4 by infrared array, will test position
It is poor that the ambient temperature and real-time measured temperature of point make, and when making the value of difference more than threshold, can recognize that people or object；
Finally, when recognizing the radiation larger object of microwave such as people or vehicle, signal processing chip passes infrared array
The data that sensor transmits are handled, and the data monitoring interface of signal-processing board transfers data to electricity by serial ports conversion module
Brain server, and come out by digital serial port assistant's real-time display；
The above full angle infrared identification device infrared identification rate is high, small, easy to operate, with high content of technology, infrared knowledge
The modification and download of other algorithm are easily realized.
More preferably, rotating platform includes objective table and motor, and objective table is located at the upper end of the rotating platform, objective table
Bottom be equipped with the groove of cuboid, groove is arranged right below motor, and the shaft of motor matches groove, the shaft and load of motor
Object platform is rotatablely connected, and motor is electrically connected with signal-processing board by the second cable, and motor is equipped with protective cover, and motor passes through first
Frame is perpendicularly fixed at the upper surface of the bottom of protective cover, and the lower surface of protective cover is equipped with second support, and second support is fixed on ground
Face, four infrared sensor arrays are fixed on the surrounding of objective table with 90 ° of even angles respectively, pass through the shaft band dynamic load of motor
Object platform rotates, and realizes 360 ° of full visual field target detections of infrared sensor array, increases infrared identification range；
More preferably, it is fixed on objective table using four infrared sensor arrays, passes through the shaft band dynamic load of motor
Object platform executes high speed rotation, using brshless DC motor, it can be achieved that high speed stablizes identification, improves infrared identification accuracy rate, reduces
Rate of false alarm；
In addition, the infrared array for the MLX90621 series that infrared sensor array is produced using Melexis companies senses
Device, the infrared sensor array are configured to 16*4 pixels, increase infrared identification distance, improve infrared identification rate；
More preferably, the upper surface of objective table is set as 50cm at a distance from ground, and the infrared sensor array regards
Rink corner is 120 ° * 25 °, and the height of second support can up and down adjustment.It can effectively identify the short and small biology of earth's surface.
Example the above is only the implementation of the present invention, not thereby example the above is only the implementation of the present invention, not because
The scope of the claims of this limitation present invention, it is every using equivalent structure made by description of the invention and accompanying drawing content, or directly or
Other related technical areas are used in indirectly, are included within the scope of the present invention.
Claims (9)
1. a kind of full angle infrared identification device, it is characterised in that：Described device includes signal acquisition and processing apparatus, is fixed on ground
Rotating platform, display storage device and the power supply unit in face；
The signal acquisition and processing apparatus includes infrared sensor array (1), signal-processing board (2) and the first cable (3), described
Infrared sensor array is fixed on the upper surface of the objective table (4) of the rotating platform and is uniformly distributed in the four of the objective table
Week, the infrared sensor array are electrically connected with the signal-processing board by the first cable, and the signal-processing board is equipped with
Signal processing chip (5), program download interface (6) and data monitoring interface (7)；
The rotating platform includes the objective table and motor (8), and the objective table is located at the upper end of the rotating platform, described
The bottom of objective table is equipped with the groove (9) of cuboid, and the motor is located at the underface of the groove, the shaft of the motor
(10) groove is matched, the shaft of the motor is rotatablely connected with the objective table, the motor and the signal-processing board
By the second cable electric (11) connection, the motor is equipped with protective cover (12), and the motor is vertically solid by first support (13)
Due to the upper surface of the bottom of the protective cover, the lower surface of the protective cover is equipped with second support (14), the second support
It is fixed on ground；
The display storage device includes display screen (15) and host computer (16), and the display screen is electrically connected with the host computer
Connect, one end of serial ports conversion module (17) is electrically connected with the host computer, the other end of the serial ports conversion module with it is described
Data monitoring interface is electrically connected；
The power supply unit includes accumulator (18), and one end and the accumulator of button box (19) pass through third cable (20) electricity
Connection, the other end of the button box are electrically connected with the signal-processing board by the 4th cable (21).
2. a kind of full angle infrared identification device according to claim 1, it is characterised in that：The infrared sensor array
Quantity be four, distribution angle of each infrared sensor array on the circumference of the rotating platform be 90 degree.
3. a kind of full angle infrared identification device according to claim 1, it is characterised in that：The infrared sensor array
For the infrared sensor array of the MLX90621 series of Melexis companies production, the infrared sensor array is configured to 16*
4 pixels, 120 ° of * 25 ° of field angles.
4. a kind of full angle infrared identification device according to claim 1, it is characterised in that：The upper surface of the objective table
Vertical range with ground is 50cm.
5. a kind of full angle infrared identification device according to claim 1, it is characterised in that：The motor is brush DC
The operating voltage of motor, the motor is direct current 3.3V.
6. a kind of full angle infrared identification device according to claim 1, it is characterised in that：The voltage of the accumulator is
Direct current 5V.
7. a kind of full angle infrared identification device according to claim 1, it is characterised in that：The signal processing chip type
Number it is MSP 430Fr 2310, the signal processing chip includes infrared identification algorithm.
8. a kind of full angle infrared identification device according to claim 1, it is characterised in that：First cable includes electricity
Source line, ground wire, signal receive line and signal sends line, and second cable, third cable and the 4th cable all include power cord
And ground wire.
9. a kind of full angle infrared identification device according to claim 1, it is characterised in that：The height of the second support
It can up and down adjustment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810194567.5A CN108388178A (en) | 2018-03-09 | 2018-03-09 | A kind of full angle infrared identification device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810194567.5A CN108388178A (en) | 2018-03-09 | 2018-03-09 | A kind of full angle infrared identification device |
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| Publication Number | Publication Date |
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| CN108388178A true CN108388178A (en) | 2018-08-10 |
Family
ID=63066732
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201810194567.5A Withdrawn CN108388178A (en) | 2018-03-09 | 2018-03-09 | A kind of full angle infrared identification device |
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| Country | Link |
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| CN (1) | CN108388178A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109632111A (en) * | 2019-01-31 | 2019-04-16 | 中国海洋大学 | A kind of infrared three-dimensional temperature measuring equipment suitable under closed environment |
| CN111998949A (en) * | 2020-05-21 | 2020-11-27 | 中国地质大学（北京） | Short-range temperature identification device based on infrared sensor and image identification |
| CN114235156A (en) * | 2021-11-30 | 2022-03-25 | 深圳市优必选科技股份有限公司 | Human body detection device and safety detection system |
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| CN106333820A (en) * | 2016-10-20 | 2017-01-18 | 鄄城县人民医院 | Multifunctional clinical diagnosis device for department of pediatrics |
| CN205899353U (en) * | 2016-06-28 | 2017-01-18 | 江西省聚云科技有限公司 | Intelligence perception energy -saving control device |
| CN106600777A (en) * | 2016-12-09 | 2017-04-26 | 济南赛英立德电子科技有限公司 | Infrared array number-of-personnel sensor-based counting method and apparatus |
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| CN200941654Y (en) * | 2006-08-04 | 2007-08-29 | 李鸿 | Universal ball for monitoring |
| KR20080076201A (en) * | 2007-02-15 | 2008-08-20 | 주식회사 아이원맥스 | Movable type security system by omnidirectional perception camera |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109632111A (en) * | 2019-01-31 | 2019-04-16 | 中国海洋大学 | A kind of infrared three-dimensional temperature measuring equipment suitable under closed environment |
| CN111998949A (en) * | 2020-05-21 | 2020-11-27 | 中国地质大学（北京） | Short-range temperature identification device based on infrared sensor and image identification |
| CN111998949B (en) * | 2020-05-21 | 2022-04-01 | 中国地质大学（北京） | Short-range temperature identification device based on infrared sensor and image identification |
| CN114235156A (en) * | 2021-11-30 | 2022-03-25 | 深圳市优必选科技股份有限公司 | Human body detection device and safety detection system |
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