CN101882236A - Personnel counting method and equipment based on embedded system - Google Patents
Personnel counting method and equipment based on embedded system Download PDFInfo
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- CN101882236A CN101882236A CN2009100719752A CN200910071975A CN101882236A CN 101882236 A CN101882236 A CN 101882236A CN 2009100719752 A CN2009100719752 A CN 2009100719752A CN 200910071975 A CN200910071975 A CN 200910071975A CN 101882236 A CN101882236 A CN 101882236A
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Abstract
The invention relates to personnel counting method and equipment based on an embedded system. Information collected by adopting the traditional mode for collecting human body information is messy. The method comprises the following steps of: collecting signals: placing a detector of a signal collecting device at the top of a human body passing area, only responding human body signals limited in a detection area by an infrared pyroelectricity sensor through a reformed optical system, and converting the collected irregular signals into regular signals which can be identified by a processor; processing the signals: after the identifiable regular human body infrared signals are inputted to the core processor, indentifying the human body moving directions by adopting a fuzzy identification algorithm, and then counting personnel quantity in real time and automatically storing in an external memory; and establishing a system USB transmission interface by utilizing a USB controller of an embedded microprocessor so that users can transfer the data of personnel information in the memory through the USB interface. The invention is used for counting personnel in messy streams of people.
Description
Technical field
The present invention relates to one and utilize human infrared signal to discern the personnel movement direction, and holdee's quantity is carried out the system that real-time counting is added up, belong to detection of electrons and signal Processing field.
Background technology
At present, to having the personnel amount statistics of flow of personnel occasion, most situations still adopt traditional handwork statistical both at home and abroad.Also the someone attempts detector is placed on the side of personnel movement direction, utilizes Fresnel Lenses to survey the human body face signal, the identification of identification human body moving direction; The somebody lines up matrix to sensor, discern the human body moving direction in proper order by the sensor response, it all is mixed and disorderly that but these methods are gathered human body information, even if after treatment, human body signal can not have stronger systematicness yet, so the sensitivity and the precision of identification are not high, also has very big gap from practical application.
Summary of the invention:
The purpose of this invention is to provide a kind of accuracy height, power consumption is little and cost is low personnel counting system based on embedded system, it serves as to detect target with the peculiar radiation signal of human body, signal Processing adopts the algorithm of fuzzy diagnosis, science, real-time, accurate personnel's statistics, correct commerce is judged and the more careful business strategy of formulation provides foundation for the supvr makes.The invention provides the equipment that this method is used.
The object of the present invention is achieved like this:
A kind of method based on the embedded system personnel counting comprises:
A. signals collecting: the detector of signal pickup assembly is placed on the top of human body by the zone, through the optical system of transforming, pyroelectric infrared sensor only to limiting the human body signal response in the search coverage, changes the means of chaotic signals that collects into processor discernible regular signal;
B. signal Processing: but after the recognition rule human infrared signal is input to core processor, adopt fuzzy diagnosis algorithm identified human body moving direction, carry out the real-time statistics of personnel amount, and be stored in the external memory automatically;
C. the USB controller constructing system USB transmission interface that utilizes embedded microprocessor to carry, the user can be by the data of personal information in the USB interface transfer register.
Described method based on the embedded system personnel counting, the altitude range that described detector is placed is at 1.8～4m.The detection area of sensor generally is limited to diameter 1～1.5m effective coverage.
Described method based on the embedded system personnel counting is carried out real-time exchange with human body signal between described signal pickup assembly and the signal processing apparatus, by not being subjected to space constraint wireless transmission method or wire transmission mode.
A kind of equipment that uses based on the method for embedded system personnel counting, its composition comprises: core processor, the data-carrier store that is connected with described core processor, LCD, it is formed and also comprises signal pickup assembly, with described signal pickup assembly get in touch wireless the wire transmission module, the signal receiving device of getting in touch with described signal pickup assembly, described signal receiving device comprises described core processor, the data-carrier store that is connected with described core processor, LCD, to the usb circuit of going out to export, adopt powerful memory management of embedded real-time operating system and I/O management, worked out wireless receiving module, usb interface module, the driver of memory module and LCD MODULE and application program.
The equipment that described method based on the embedded system personnel counting is used, described signal pickup assembly comprise human-body infrared sensing device, the signal processor that is connected with described human-body infrared sensing device and wireless the wire transmission module.
The invention advantage:
1. the human surface temperature is 36～37 ℃, and the wavelength of its radiation is 9～10 μ m in spectrum.The infrared of this wavelength is very special in the nature mobile object, therefore utilizes the diffuse scattering phenomenon of this special temperature radiation, can catch human body signal by this wave band infrared thermal release electric detector.Pyroelectric infrared sensor is to be used for catching specially the detector of human body signal, strong dielectric material surface in its polarization when sensor absorbs infrared signal can induce electric charge, change voltage signal into through the electric charge amplification, the fluctuation of voltage signal promptly can be used for the detection of human body signal.But the detection visual angle of the pyroelectric infrared sensor sensor that existing market is sold is all more than 90 °, search coverage is very wide, so gather unimodal single paddy that the signal of human body is not a rule, the signal mutual superposition produces means of chaotic signals, this handles to follow-up signal and has increased uncertainty.Therefore, must just means of chaotic signals can be transformed into the regular signal that can be used as detection through the optical system of transforming.The present invention has solved this problem effectively.
2. comprise human-body infrared sensing device, signal processor and wireless the wire transmission module, be used for gathering the infrared signal with peculiar wavelength that human body gives out, and with the wireless signal receiving device that is sent in real time of human body signal.Signal pickup assembly is surveyed the effective coverage diameter and is set to 1～1.5m, and acquisition sensor setting height(from bottom) scope is arranged on 1.8～4m, and human body (3) is about 0.3～1.0 second from entering search coverage to the time of walking out search coverage.When human body passes through search coverage with normal leg speed (1 meter per second), the waveform that produces is the signal of unimodal single paddy as shown in Figures 2 and 3, but when leg speed difference and continuous discrepancy, waveform can not be the regular signal of unimodal single paddy just, needs to adopt the fuzzy diagnosis algorithm to be distinguished.The fuzzy diagnosis algorithm that method of the present invention can be finished by core computer has been finished the regular signal difference of indeterminable unimodal single paddy in this conventional art.
3. aspect the total system function software, the present invention utilizes powerful memory management of embedded real-time operating system and I/O management function, the driver and the application program of wireless receiving module, usb interface module, memory module and LCD MODULE have been worked out, system can be carried out by multi-task parallel, can effectively avoid race and I/O to block.Simultaneously, utilize powerful data processing function of embedded microprocessor and abundant interface resource, based on OHCI agreement under the linux system, write the usb data transmitting software, by USB interface the personnel's data message that collects is stored in user's the USB device with document form.
4. the GUI graphical application software design that utilization of the present invention is popular in the world the graphic user interface of system, this software can effectively be handled various external message based on message and pipeline mechanism, the similar desktop PC of its operation interface interface, simple to operate, powerful, beautiful interface.
Description of drawings:
Fig. 1 is the structural representation of personnel's real-time counting system and device; Human mobile signal's actual waveform figure that the optical system detection that process is transformed arrives respectively as shown in Figures 2 and 3.
Fig. 2 is the waveform of human body forward by effective search coverage.
Fig. 3 is the reverse waveform by effective search coverage of human body, can be used as out the distinguishing mark of Inbound as can be seen because of the different different wave shapes that produce of human body direction.
Fig. 4 is the process flow diagram of FUZZY ALGORITHMS FOR CONTROL, and computing machine or microprocessor relatively are easy to realize fuzzy control by calling subfunction as can be seen.
Fig. 5 is the interrupt service routine process flow diagram.The time of the shared processor of interrupt service routine is determined by the human body leg speed, when human body moves when very fast, the shared time is just very short, if the human body that is detected is the search coverage of pacing into, then processor can be in interrupt service routine always, shifts out search coverage up to human body.
Fig. 6 is an electrical schematic diagram of the present invention.
Fig. 7 is the hardware configuration connection layout of this product.
Embodiment:
Embodiment 1:
A kind of method based on the embedded system personnel counting comprises:
A. signals collecting: the detector of signal pickup assembly is placed on the top of human body by the zone, through the optical system of transforming, pyroelectric infrared sensor only to limiting the human body signal response in the search coverage, changes the means of chaotic signals that collects into processor discernible regular signal;
B. signal Processing: but after the recognition rule human infrared signal is input to core processor, adopt fuzzy diagnosis algorithm identified human body moving direction, carry out the real-time statistics of personnel amount, and be stored in the external memory automatically;
C. the USB controller constructing system USB transmission interface that utilizes embedded microprocessor to carry, the user can be by the data of personal information in the USB interface transfer register.
Described method based on the embedded system personnel counting, the altitude range that described detector is placed is at 1.8～4m.The detection area of sensor generally is limited to diameter 1～1.5m effective coverage.
Described method based on the embedded system personnel counting is carried out real-time exchange with human body signal between described signal pickup assembly and the signal processing apparatus, by not being subjected to space constraint wireless transmission method or wire transmission mode.
A kind of equipment that uses based on the method for embedded system personnel counting, its composition comprises: core processor, the data-carrier store that is connected with described core processor, LCD, it is formed and also comprises signal pickup assembly, with described signal pickup assembly get in touch wireless the wire transmission module, the signal receiving device of getting in touch with described signal pickup assembly, described signal receiving device comprises described core processor, the data-carrier store that is connected with described core processor, LCD, to the usb circuit of going out to export, adopt powerful memory management of embedded real-time operating system and I/O management, worked out wireless receiving module, usb interface module, the driver of memory module and LCD MODULE and application program.
The equipment that described method based on the embedded system personnel counting is used, described signal pickup assembly comprise human-body infrared sensing device, the signal processor that is connected with described human-body infrared sensing device and wireless the wire transmission module.
The more detailed description of this method:
The acquired signal infrared sensor of system is installed in the top at the place, gateway that need carry out personnel's statistics, the setting height(from bottom) scope is adjustable (generally 1.8～4m), the receiving trap of system can be placed on user place easy to use, the user obtains the detection data by liquid crystal display interface and function menu prompting operation, and automatically real time data is kept in the nonvolatile memory, the user can utilize USB interface to extract data.
1. after but the recognition rule human infrared signal after the signal processor conversion is input to core processor, adopt fuzzy diagnosis algorithm identified human body moving direction, carry out the real-time statistics of personnel amount, and be stored in the external memory automatically.
Between signal pickup assembly and the signal processing apparatus by being wireless transmission method, also can select wire transmission mode, human body signal is carried out real-time exchange, if adopt wireless transmission method then be not subjected to space constraint.
3. the USB controller constructing system USB transmission interface that utilizes embedded microprocessor to carry, the user can be by the data of personal information in the USB interface transfer register.
4. work out each modules driver of system and application program based on embedded real-time operating system, comprised wireless receiving module, usb interface module, memory module and LCD MODULE.
1. FUZZY ALGORITHMS FOR CONTROL
If carry out complicated matrix operation in realizing the reasoning engineering, workload is very big, is difficult to satisfy the real-time requirement of control system, therefore uses the look-up table of compositional rule of inference.Look-up table is a kind of off-line inference method of avoiding complex calculation, in advance the fuzzy control table that calculates is placed in the program, be compiled into a form, sampled value is after Fuzzy processing, by the value after the quantification factor transformation, search fuzzy control table in accordance with regulations, return an exact value then.Fig. 4 is the process flow diagram of FUZZY ALGORITHMS FOR CONTROL, and computing machine or microprocessor relatively are easy to realize fuzzy control by calling subfunction as can be seen.
When nobody when the search coverage, sensor output signal through amplifier filtering after, basicly stable between 2.5V ± 0.5V, only when disturbing or having personnel to pass through search coverage, can produce greater than 3V or less than the signal of 2V.We distinguish capping threshold value and lower threshold, have only when signal surpasses threshold value the processor computing of just sampling.If the useful signal that undesired signal caused can pass through the software mode filtering, make interrupt service routine return principal function as soon as possible.The utilization rate that this just reduces processor to greatest extent can guarantee also simultaneously that processor can respond rapidly when human body passes through search coverage.If the human body useful signal, then processor is judged the human body moving direction by the fuzzy diagnosis mode, adds up then, stores and show.The interrupt service routine process flow diagram, as shown in Figure 5.The time of the shared processor of interrupt service routine is determined by the human body leg speed, when human body moves when very fast, the shared time is just very short, if the human body that is detected is the search coverage of pacing into, then processor can be in interrupt service routine always, shifts out search coverage up to human body.
2.USB data transmission
(1) the usb data transmission mode is selected
USB device communication realizes by end points, and end points can only be toward a direction Data transmission, promptly from the main equipment to the slave unit or slave unit to main equipment.End points can be regarded as unidirectional pipeline, it has four kinds of different types, have different data modes respectively: control transmission, interrupt transmission, bulk transfer, etc. the time transmission, in the design, mainly be to gather the personal information data by USB device, must focused data under this situation transmission accuracy and, we must select bulk transfer to come mode as the USB device data transmission based on this.
(2) USB device drives under the built-in Linux operating system
Use functions such as USB operation and interface for convenience, native system has used USB device driving function under the (SuSE) Linux OS.The USB device driver is the software interface between hardware and operating system nucleus, is a kind of component software that is exclusively used in a certain hardware.Can be regarded as a class special file in Linux, be referred to as " device file ", all hardware equipment in the system all can use a special device file to represent, generally equipment is divided into character device, block device and the network equipment.When a program was opened a device file, kernel just can obtain information such as device type, major device number and the slave unit number of corresponding device, and kernel just knows also which driver is program need manipulate.Subsequently, program all can be called the corresponding driving program function to the operation of this file, simultaneously device number is passed to device driver.Must realize that in the Linux driver following function device could normally move, that is:
● identification drives the equipment that can support
● to system kernel registration and cancellation
● the installation and the deletion of detection and treatment facility
● the standard interface of operating equipment is provided
To be illustrated respectively at each realization below:
A. the identification of equipment
Definition structure body usb_device_id, it has defined the USB device that dissimilar these drivers are supported, and the USB core uses this equipment of judging a new insertion of tabulating to use which driver
The registration of b.USB device driver and cancellation
Initialization structure usb_driver, as follows
static?struct?usb_driver?skel_driver＝{
.owner＝THIS_MODULE，
.name＝″skeleton″，
.probe＝skel_probe，
.disconnect＝skel_disconnect，
.id_table＝skel_table，
}；
struet?module＊owner
The owner of this structure pointed driver module, the USB core uses it correctly this USB driver to carry out reference count, makes the driver module can be not unloaded when improper, and to be set to THIS_MODULE grand for this variable usually.
const?char＊name
This pointed drives the character string of title, it should be noted that the name of driving can not drive repetition with other.
const?struet?usb_device_id＊id_table
This pointed structure usb_device_id comprises all and drives the dissimilar USB device of supporting.
int(＊probe)(struct?usb_interfaee＊intf，const?sruct?usb_devie_id＊id)
This pointer is the probe function pointer that points in the USB driving.
void(＊disconneet)(struct?usb_interface＊intf)
Disconnection function pointer during this pointed USB drives, when driving from the USB core from unloading, the USB core will be called this function.Be registered to core and will call usb_register_driver () respectively and usb_deregister_driver () function is finished when kernel delete by rmmod driving by insmod, these two functions are parameter with the pointer of usb_driver all.
C. the operation-interface of equipment
The operation-interface function of equipment mainly is to carry out data interaction with relevant device, comprises the equipment of opening, reading of data, releasing arrangement etc.All equipment all is seen as file and operates in linux system, opens and read and write an equipment also just as opening an ordinary file, only need call functions such as open in the driving, read and write.Specific as follows:
Static int skel_open (struct inode*inode, struct file*file)/* open equipment */
Static int skel_release (struct inode*inode, struct file*file)/* releasing arrangement */
Static ssize_t skel_read (struct file*file, char*buffer, size_t count, loff_t*ppos)/* read data */
static?ssize_t?skel_write(struct?file＊file，const?char＊user_buffer，size_t?count，loff_t＊ppos)/＊
Write data */
Static int skel_probe (struct usb_interface*interface, const struct usb_device_id*id)/* probe function */
Static void skel_disconnect (struct usb_interface*interface)/* off device connection */
3. chromatic liquid crystal screen drives
For the data presentation and the operation interface that make system are realized at liquid crystal system, native system utilizes Framebuffer equipment of (SuSE) Linux OS definition, it is the level of abstraction of graphic hardware equipment, the frame buffer zone of vision hardware is described, one group of interface of accessible with application software graphic hardware very easily is provided, application software does not need to understand any information of any bottom hardware equipment, only needs to get final product by the appointed equipment node visit.For for the exploitation of Framebuffer equipment development application program, Framebuffer equipment and memory device have same feature as/dev/mem, can reading and writing, navigate to assigned address and carry out mmap () operation, the memory block that difference is in the file and is occurred is not whole storage area, but the frame buffer zone of graphics device.Equipment allows part ioctls operation, and by these action queries with hardware information is set, the processing of color table is also included within the middle of these operations.The process that Linux operates Framebuffer equipment down is as follows:
A. obtain the information of fixed in hardware, as the address of the tissue of title, screen cache and screen cache and length etc.;
But b. obtain or be provided with the hardware configuration information, as visual and virtual pattern zone, color table form, sequential etc., when these information were set, driving may be cast out the value of setting that does not meet hardware capabilities or return EINVAL that to represent that this is provided with impossible.
C. obtain and be provided with color table, comprise red, green, blue, 16 transparent color tables are supported all already present hardware devices, driver has been finished all evaluation works that need be applied to hardware.
We have defined with minor function and have realized associative operation in the specific implementation process:
S3c44b0xfb_detect detects current video and pattern is set and saves as default mode;
S3c44b0xfb_encode_fix fills the fixed in hardware message structure according to input parameter;
S3c44b0xfb_decode_var obtains hardware setting information and checks whether this setting is available from parameter;
But s3c44b0xfb_encode_var fills the hardware configuration information according to input parameter, and the direct access hardware of partial information is obtained;
S3c44b0xfb_get_par fills the hardware related data structures;
S3c44b0xfb_set_par is provided with the hardware related data according to input parameter;
S3c44b0xfb_getcolreg reads color register and returns 16 color tabular values;
S3c44b0xfb_setcolreg is provided with color register according to 16 color tabular values;
S3c44b0xfb_pan_display shows according to the offset coordinates adjustment in the input structure;
S3c44b0xfb_blank empties screen according to input pattern;
The pointer that s3c44b0xfb_set_disp is provided with frame buffer zone virtual address pointer and is fit to rudimentary text control desk.
Embodiment 2:
The equipment that uses based on the method for embedded system personnel counting, its composition comprises: core processor 1, the data-carrier store 2 that is connected with described core processor, LCD 3, it is formed and also comprises signal pickup assembly, with described signal pickup assembly get in touch wireless wire transmission module 6, the signal receiving device of getting in touch with described signal pickup assembly.
Described signal receiving device comprises described core processor 1, the data-carrier store 2 that is connected with described core processor, LCD 3, the usb circuit 4 to going out to export, adopt powerful memory management of embedded real-time operating system and I/O management, worked out the driver and the application program of wireless receiving module, usb interface module, memory module and LCD MODULE.
Described signal pickup assembly comprise human-body infrared sensing device 5, the signal processor that is connected with described human-body infrared sensing device and wireless wire transmission module 6.
Claims (5)
1. method based on the embedded system personnel counting is characterized in that:
A. signals collecting: the detector of signal pickup assembly is placed on the top of human body by the zone, through the optical system of transforming, pyroelectric infrared sensor only to limiting the human body signal response in the search coverage, changes the means of chaotic signals that collects into processor discernible regular signal;
B. signal Processing: but after the recognition rule human infrared signal is input to core processor, adopt fuzzy diagnosis algorithm identified human body moving direction, carry out the real-time statistics of personnel amount, and be stored in the external memory automatically;
C. the USB controller constructing system USB transmission interface that utilizes embedded microprocessor to carry, the user can be by the data of personal information in the USB interface transfer register.
2. the method based on the embedded system personnel counting according to claim 1 is characterized in that: the altitude range that described detector is placed is at 1.8～4m.The detection area of sensor generally is limited to diameter 1～1.5m effective coverage.
3. the method based on the embedded system personnel counting according to claim 1 and 2, it is characterized in that: between described signal pickup assembly and the signal processing apparatus human body signal is carried out real-time exchange, by not being subjected to space constraint wireless transmission method or wire transmission mode.
4. equipment that uses based on the method for embedded system personnel counting, its composition comprises: core processor, the data-carrier store that is connected with described core processor, LCD, it is characterized in that: it is formed and also comprises signal pickup assembly, with described signal pickup assembly get in touch wireless the wire transmission module, the signal receiving device of getting in touch with described signal pickup assembly, described signal receiving device comprises described core processor, the data-carrier store that is connected with described core processor, LCD, to the usb circuit of going out to export, adopt powerful memory management of embedded real-time operating system and I/O management, worked out wireless receiving module, usb interface module, the driver of memory module and LCD MODULE and application program.
5. the equipment that the method based on the embedded system personnel counting according to claim 4 is used is characterized in that: described signal pickup assembly comprise human-body infrared sensing device, the signal processor that is connected with described human-body infrared sensing device and wireless the wire transmission module.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102541087A (en) * | 2011-12-30 | 2012-07-04 | Tcl集团股份有限公司 | Automatic direction adjusting method and system for display device as well as display device |
| CN102622797A (en) * | 2012-02-22 | 2012-08-01 | 易程(苏州)电子科技股份有限公司 | Monitoring method applied to ticket checking gate |
| CN102651086A (en) * | 2011-02-28 | 2012-08-29 | 大连海兰德维通信技术有限公司 | Counting device, counting method and infrared detection system |
| CN103318739A (en) * | 2013-07-03 | 2013-09-25 | 北京北安时代电梯安装工程有限公司 | Automatic escalator and automatic sidewalk human flow statistically analyzing, prewarning, monitoring and managing system |
| CN103942869A (en) * | 2014-05-09 | 2014-07-23 | 山东大学 | Monitoring system for detecting number of accessing personnel by virtue of infrared ray array and application of monitoring system |
| CN104167034A (en) * | 2014-06-17 | 2014-11-26 | 武汉理工大学 | Human body counting device based on pyroelectric technology |
| CN106629279A (en) * | 2017-01-17 | 2017-05-10 | 顺德职业技术学院 | Elevator with passenger capacity display function |
| CN110260810A (en) * | 2018-03-12 | 2019-09-20 | 深圳鼎然信息科技有限公司 | The vehicles, which multiply, carries demographic method, device, equipment and medium |
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2009
- 2009-05-07 CN CN2009100719752A patent/CN101882236A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102651086A (en) * | 2011-02-28 | 2012-08-29 | 大连海兰德维通信技术有限公司 | Counting device, counting method and infrared detection system |
| CN102651086B (en) * | 2011-02-28 | 2015-07-29 | 北京海兰德维通信技术有限公司 | A kind of counting assembly, method and infrared detection system |
| CN102541087A (en) * | 2011-12-30 | 2012-07-04 | Tcl集团股份有限公司 | Automatic direction adjusting method and system for display device as well as display device |
| CN102622797A (en) * | 2012-02-22 | 2012-08-01 | 易程(苏州)电子科技股份有限公司 | Monitoring method applied to ticket checking gate |
| CN103318739A (en) * | 2013-07-03 | 2013-09-25 | 北京北安时代电梯安装工程有限公司 | Automatic escalator and automatic sidewalk human flow statistically analyzing, prewarning, monitoring and managing system |
| CN103318739B (en) * | 2013-07-03 | 2014-11-19 | 北京北安时代电梯安装工程有限公司 | Automatic escalator and automatic sidewalk human flow statistically analyzing, prewarning, monitoring and managing system |
| CN103942869A (en) * | 2014-05-09 | 2014-07-23 | 山东大学 | Monitoring system for detecting number of accessing personnel by virtue of infrared ray array and application of monitoring system |
| CN104167034A (en) * | 2014-06-17 | 2014-11-26 | 武汉理工大学 | Human body counting device based on pyroelectric technology |
| CN106629279A (en) * | 2017-01-17 | 2017-05-10 | 顺德职业技术学院 | Elevator with passenger capacity display function |
| CN110260810A (en) * | 2018-03-12 | 2019-09-20 | 深圳鼎然信息科技有限公司 | The vehicles, which multiply, carries demographic method, device, equipment and medium |
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Application publication date: 20101110 |