CN201514662U - Two-dimensional infrared people number sensor - Google Patents
Two-dimensional infrared people number sensor Download PDFInfo
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- CN201514662U CN201514662U CN2009200251269U CN200920025126U CN201514662U CN 201514662 U CN201514662 U CN 201514662U CN 2009200251269 U CN2009200251269 U CN 2009200251269U CN 200920025126 U CN200920025126 U CN 200920025126U CN 201514662 U CN201514662 U CN 201514662U
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Abstract
The utility model provides a two-dimensional infrared people number sensor for improving the precision of identifying people number. The two-dimensional infrared people number sensor comprises two infrared photoelectric sensor arrays, an infrared optical system and a signal processing circuit, wherein the two infrared photoelectric sensor arrays are mounted above a door frame; the infrared optical system enables the photoelectric sensor arrays to form a vision area; the signal processing circuit is used for processing and controlling output signals of the photoelectric sensor arrays and outputting the processed signals; the output terminal of the signal processing circuit is connected with an interface circuit; and the sensor also comprises an infrared illuminating lamp for supplemented illumination. The two-dimensional infrared people number sensor device can identify the people number of the motion direction of people at high precision and is suitably applied to classrooms, offices, public buildings and other places.
Description
Technical field
The utility model discloses the two-dimensional infrared number sensor device of raising number accuracy of identification.Belong to daily-use electrical appliance control technology field.
Background technology
Some occasions need the number in the Data Analyzing Room.As in lighting energy saving control, a kind of pattern of subregion control is arranged, according to the quantity of indoor occupant, zone and quantity that decision is turned on light; At market and station, the volume of the flow of passengers that need add up every day and flow distribution etc.Number in the measuring chamber, general way are at each place, gate in room the number sensor to be installed, according to the indoor number that how much calculates of each sensor statistics turnover number.
Number sensor commonly used has based on the correlation of infrared correlation principle with based on the motion counter two big classes of double base pyroelectric infrared sensor.The ultimate principle of correlation sensor is to utilize asynchronism(-nization) and the pulse number that shut out the light direction of motion and the quantity of discerning human body of human body by two bundle correlation Infrared.The ultimate principle of motion attribute number sensor is to utilize human body to pass through the direction difference of two vision areas of double base pyroelectric sensor, and the polarity difference of output voltage is judged the human motion direction, and the number of pulse is directly proportional to determine number with the number of passing through.
The sensor all is an one dimension to the identification of number, and the correlation sensor can only be discerned human body and block ultrared that side, and the motion counter can only be discerned human body and enter and walk out of the vision area state of moment.Their common feature is: when an independent people came in and went out, discrimination was higher; When two people came in and went out simultaneously, discrimination began to reduce, and discrimination becomes the factorial relation to reduce with the number of coming in and going out simultaneously.As single by discrimination be 1, two people simultaneously by the time, arranging at a distance of certain distance before and after having only could correct identification, about arrange and can't discern, discrimination is 1/2, three people when entering simultaneously, discrimination is 1/8, the rest may be inferred by analogy.Personnel are that therefore, the one dimension sensor is very low at the discrimination of practical application, can only be used for some occasions not high to the number accuracy requirement, can't satisfy the requirement of normal use at random through the number and the arrangement at gate.
Summary of the invention
The utility model provides a kind of two-dimensional infrared number sensor device that improves the number accuracy of identification at the deficiency of prior art.
Two-dimensional infrared number sensor of the present utility model, comprise that two are installed in the output signal of the infrared photoelectric sensor array of doorframe top, the infrared optical system that makes infrared photoelectric sensor array formation vision area and processing and control infrared photoelectric sensor array and the signal processing circuit that the signal after handling is exported, the output terminal of described signal processing circuit is connected with interface circuit, and described sensor device also comprises the infrared illumination lamp that carries out additional illumination.
Two-dimensional infrared number sensor of the present utility model, the orientation of two infrared photoelectric sensor arrays is vertical with the direction of human motion, the infrared illumination lamp is used for when ambient light illumination is not enough additional illumination according to the size control opening and closing of the white signal of vision signal.
Two-dimensional infrared number sensor of the present utility model, described signal processing circuit comprises A/D converter, digital signal processor that is connected with the output terminal of A/D converter and the interface circuit that is connected with the output terminal of digital signal processor, the signal input part of described A/D converter is connected with analog switch, described digital signal processor is connected with the address port of analog switch, and described digital signal processor is connected with the infrared illumination lamp.
Below introduce structure of the present utility model and principle in detail, the orientation of two infrared photoelectric sensor arrays is vertical with the direction of human motion, has been equivalent to install above doorframe the thermal camera of a low resolution.Infrared optical system makes each array element (being also referred to as pixel) form non-overlapping copies or overlapping seldom vision area on the ground on doorway, human body from vision area by the time, the photocurrent that the infrared ray of reflection will change in corresponding photoelectric tube.The infrared illumination lamp is used for when ambient light reduces, and additional illumination guarantees the requirement of round-the-clock use.Treatment circuit is according to two array elements of certain frequency multiple scanning, form vision signal, after the A/D conversion, be transformed into digital video signal, again by technology such as digital signal processing (DSP) and pattern recognitions, from vision signal, extract the quantity and the direction of motion information of human body, calculate number.
The utility model is extraction number and a directional information from the vision signal of low resolution, advantage is the restriction that is not subjected to the number, position, posture and the direction that pass in and out simultaneously, be subjected to environment and influence of temperature variation little, discrimination reaches very high precision, is number sensor truly.Be used for the accurately occasion use of statistics occupancy of needs, be with a wide range of applications.
Description of drawings
Fig. 1 is a composition frame chart of the present utility model; Fig. 2 is a schematic diagram; Fig. 3 is the treatment circuit composition frame chart.
Embodiment
Below in conjunction with accompanying drawing the utility model is described in further detail:
Fig. 1 has provided composition frame chart of the present utility model, Fig. 2 has provided schematic diagram of the present utility model, below in conjunction with Fig. 1 and Fig. 2 principle of work of the present utility model and composition are described, the pixel of infrared photoelectric sensor is by the width and the resolution requirement decision of door, and pixel value is more little, and image resolution ratio is low, to processor require low, but when human body passed through, the effective pixel points of formation was few, brought difficulty for the profile identification of human body; Pixel value is big more, the image resolution ratio height, but require the arithmetic speed height and the operand of processor big.Need take all factors into consideration to determine pixel quantity from these two aspects.The engineering model of human body is the rectangle of 20 * 50cm, correctly discern human body, when must the underwriter leaning to one side to enter, has plural pixel at least.The pixel separately of each array forms vision area separately on the doorway, in order to guarantee correctly to determine the profile of human body, and the vision area that each pixel forms, requirement can not overlap each other or be overlapping very little, and this is the requirement to optical system.Distance between two array vision areas can not be too big, otherwise pedestrian outdoors also may cause interference; Can not be too little, otherwise running enters signal frame number that human body forms very little, and identification brings certain difficulty to human body.
Infrared optical system also requires logical light quantity big, to improve the vision signal signal to noise ratio (S/N ratio) except guaranteeing to form the required vision area.After the infrared illumination lamp is used for the ambient light reduction, additional illumination.It is by the size decision opening and closing of control circuit according to the white signal of vision signal.
As shown in Figure 1, treatment circuit is become by analog switch, A/D converter and bank of digital signal processors.Analog switch is undertaken the picture element scan task, by DSP circuit controling switch address, scans the A array earlier, scans the B array again, forms two row vision signals, forms a frame video signal.A/D converter converts the vision signal of simulation to digital signal, is convenient to computing and processing.
Digital signal processor shown in Fig. 3 (DSP) finishes image signal's collection, computing, number identification and human motion direction identification entire process process, adopts Flame Image Process mode and human body contour outline recognition technology to carry out number identification.In the video signal of gathering, comprising the number information of inlet/outlet simultaneously in every capable signal; Comprised the human motion directional information between two row signals in the frame; Human motion speed and interval information have been comprised between each frame signal; The amplitude of signal has comprised human body different parts information.Vision signal is the human body to the turnover doorway, carries out two-dimentional infrared scan from the angle of overlooking, and therefore, is called two-dimensional infrared number sensor.
Interface circuit is responsible for communicating by letter between digital signal processor and the host computer, is used to receive steering order and uploads the number information.
In actual applications, the opening and closing information that is also comprising various noises and door in the picture signal; In the human body signal, also may comprise bosom or bear information such as object.In order correctly to count the number of people, must be reduced to the influence of adopting the profile recognition technology with these disturbing factors minimum.
According to the variation and the gradient of row signal pixels gray scale, can extract the one dimension level about the skeleton pattern of human body of the vision area that enters simultaneously; Two row signals carry out calculus of differences in the frame, can obtain the direction of motion information of human body; From grey scale change and the gradient between each frame signal respective pixel, can extract the vertical human body contour outline model of one dimension, determine information such as direction of motion change, speed and interval, human body front and back simultaneously.Because each pixel noise is uncorrelated, bigger with the human motion profile difference, can easily remove; Door opens and closes the image that forms certain arrangement regulation, and profile and human body also have certain difference, also can easily identify.By the digital processing computing of these image recognition techniques, can discern and calculate the number and the direction of turnover like clockwork.
Claims (3)
1. two-dimensional infrared number sensor that is used to improve the number accuracy of identification, it is characterized in that: comprise that two are installed in the output signal of the infrared photoelectric sensor array of doorframe top, the infrared optical system that makes infrared photoelectric sensor array formation vision area and processing and control infrared photoelectric sensor array and the signal processing circuit that the signal after handling is exported, the output terminal of described signal processing circuit is connected with interface circuit, and described sensor device also comprises the infrared illumination lamp that carries out additional illumination.
2. two-dimensional infrared number sensor according to claim 1, it is characterized in that: the orientation of two infrared photoelectric sensor arrays is vertical with the direction of human motion, the infrared illumination lamp is according to the size control opening and closing of the white signal of vision signal, be used for when ambient light illumination is not enough additional illumination.
3. two-dimensional infrared number sensor according to claim 1, it is characterized in that: described signal processing circuit comprises A/D converter, digital signal processor that is connected with the output terminal of A/D converter and the interface circuit that is connected with the output terminal of digital signal processor, the signal input part of described A/D converter is connected with analog switch, described digital signal processor is connected with the address port of analog switch, and described digital signal processor is connected with the infrared illumination lamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200251269U CN201514662U (en) | 2009-05-11 | 2009-05-11 | Two-dimensional infrared people number sensor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009200251269U CN201514662U (en) | 2009-05-11 | 2009-05-11 | Two-dimensional infrared people number sensor |
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| CN201514662U true CN201514662U (en) | 2010-06-23 |
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| CN2009200251269U Expired - Lifetime CN201514662U (en) | 2009-05-11 | 2009-05-11 | Two-dimensional infrared people number sensor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104756159A (en) * | 2012-09-13 | 2015-07-01 | 上海劼恩喆贸易有限公司 | Device and method for counting entrance/exit by using multiple sensors |
| CN110537211A (en) * | 2017-04-21 | 2019-12-03 | 综合设计有限公司 | Optical system for being monitored to people by the movement in channel |
-
2009
- 2009-05-11 CN CN2009200251269U patent/CN201514662U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104756159A (en) * | 2012-09-13 | 2015-07-01 | 上海劼恩喆贸易有限公司 | Device and method for counting entrance/exit by using multiple sensors |
| CN110537211A (en) * | 2017-04-21 | 2019-12-03 | 综合设计有限公司 | Optical system for being monitored to people by the movement in channel |
| CN110537211B (en) * | 2017-04-21 | 2021-09-21 | 综合设计有限公司 | Optical system for monitoring the movement of a person through a passageway |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: JINAN SINE-LEAD ELECTRONIC TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: HUANG CHENGYUN Effective date: 20101207 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20101207 Address after: Study on Ji'nan casting forging Huaiyin District of Ji'nan city in Shandong province 250022 ten Road No. 466 building two floor Patentee after: Jinan Sine-lead Electronic Technology Co., Ltd. Address before: Study on Ji'nan casting forging Huaiyin District of Ji'nan city in Shandong province 250022 ten Road No. 466 building two floor Patentee before: Huang Chengyun |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100623 |