CN104332019A - Supervision system for personnel with limited motion ranges - Google Patents

Supervision system for personnel with limited motion ranges Download PDF

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Publication number
CN104332019A
CN104332019A CN201410698329.XA CN201410698329A CN104332019A CN 104332019 A CN104332019 A CN 104332019A CN 201410698329 A CN201410698329 A CN 201410698329A CN 104332019 A CN104332019 A CN 104332019A
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China
Prior art keywords
signal
module
communication module
node
scope
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CN201410698329.XA
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Chinese (zh)
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徐雅斌
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Beijing Information Science and Technology University
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Beijing Information Science and Technology University
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Priority to CN201410698329.XA priority Critical patent/CN104332019A/en
Publication of CN104332019A publication Critical patent/CN104332019A/en
Pending legal-status Critical Current

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    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
    • G08B21/02—Alarms for ensuring the safety of persons
    • G08B21/0202—Child monitoring systems using a transmitter-receiver system carried by the parent and the child
    • G08B21/0233—System arrangements with pre-alarms, e.g. when a first distance is exceeded
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
    • G08B21/02—Alarms for ensuring the safety of persons
    • G08B21/0202—Child monitoring systems using a transmitter-receiver system carried by the parent and the child
    • G08B21/0263—System arrangements wherein the object is to detect the direction in which child or item is located

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  • Health & Medical Sciences (AREA)
  • Child & Adolescent Psychology (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Alarm Systems (AREA)

Abstract

The invention relates to the field of alarm equipment, and particularly relates to a supervision system for personnel with limited motion ranges. The system comprises a signal emission node and a signal receiving node, wherein the signal emission node is used for being fixed on the personnel with limited motion ranges, and is used for transmitting a radio frequency signal to the signal receiving node; the signal receiving node obtains an RSSI value of the radio frequency signal after receiving the radio frequency signal; and if the RSSI value is not in the prestored RSSI threshold range of the signal receiving node, an alarm signal is emitted. The supervision system for the personnel with the limited motion ranges, which is disclosed by the invention, achieves an automatic alarm function that the monitored person is broken away from the monitored area through the internet of things; and the defect that a video monitoring system cannot automatically alarm is overcome.

Description

Scope of activities restricted person supervisory systems
Technical field
The present invention relates to panalarm field, particularly relate to a kind of scope of activities restricted person supervisory systems.
Background technology
Scope of activities is limited refers to the shelter that people's court, people's procuratorate, public security organ order suspect, defendant within a certain time and must not leave dwelling in the specified period or specify in criminal suit, and is monitored, limits that the one of its freedom of person implements compulsory measure to its behavior.The supervision method generally used both at home and abroad is now video monitoring, and this supervision gimmick exists some drawbacks, and not only video monitoring equipment electric quantity consumption is large, and the inconvenient installation and debugging of electro-photographic head.When unusual condition appears running away etc. in monitored person, video monitor can not realize timely automatic alarm, and monitors to there is dead angle.Therefore, how to improve to scope of activities restricted person supervision validity and intelligence degree become a regulatory bodies difficult problem in the urgent need to address.
Summary of the invention
The object of the present invention is to provide a kind of scope of activities restricted person supervisory systems, to solve the problem.
In order to achieve the above object, technical scheme of the present invention is achieved in that
A kind of scope of activities restricted person supervisory systems, comprises signal transmitting node and Signal reception node; Signal transmitting node is used for being fixed on it scope of activities restricted person, for sending radiofrequency signal to Signal reception node; After Signal reception node receives radiofrequency signal, obtain the RSSI value of radiofrequency signal, if this RSSI value is not in the RSSI threshold range that Signal reception node prestores, then send alerting signal.
Preferably, Signal reception node comprises first communication module, the first alarm module; Signal transmitting node comprises second communication module, the second alarm module; First communication module receives the radiofrequency signal that second communication module sends, if the RSSI value of radiofrequency signal is not in the RSSI threshold range that Signal reception node prestores, then sends alerting signal to the first alarm module and second communication module; After second communication module receives alerting signal, this alerting signal is sent to the second alarm module.
Preferably, Signal reception node also comprises GPRS module and serial ports turns network interface module; First communication module starts timing after sending alerting signal, if overtime, then GPRS module obtains the geographical location information of signal transmitting node and sends to first communication module; Geographical location information and alerting signal are turned network interface module by serial ports and send to Surveillance center by first communication module.
Preferably, Signal reception node also comprises gsm module; First communication module is also for sending alerting signal to gsm module; After gsm module receives this alerting signal, send this alerting signal to the mobile phone prestored.
Preferably, signal transmitting node also comprises tamper module; Tamper module is used for when signal transmitting node is removed, and sends alerting signal to second communication module; Alerting signal is sent to the second alarm module and first communication module by second communication module.
Preferably, tamper module comprises light sensor; Light sensor is arranged in signal transmitting node; Light sensor is electrically connected with second communication module.
Preferably, when first communication module is also for the open circuit of signal transmitting node, send alerting signal to the first alarm module.
Preferably, signal transmitting node also comprises gyro sensor; Gyro sensor is used for the motion direction information obtaining signal transmitting node after GPRS module obtains geographic position letter.
Compared with prior art, the advantage of the embodiment of the present invention is: signal transmitting node is fixed on it scope of activities restricted person, and continues to send radiofrequency signal to Signal reception node; After Signal reception node receives this radiofrequency signal, the RSSI value of radiofrequency signal is obtained based on RSSI distance exam principle, if this RSSI value is not in the RSSI threshold range that Signal reception node prestores, illustrate that scope of activities restricted person has departed from normal zone of action, Signal reception node sends alerting signal, remind supervisor, improve the validity of supervision.
Accompanying drawing explanation
The structural representation of the pin link point that Fig. 1 provides for the embodiment of the present invention;
The structural representation of the gateway node that Fig. 2 provides for the embodiment of the present invention;
The circuit structure diagram of the second communication module that Fig. 3 provides for the embodiment of the present invention;
The circuit structure diagram of the light sensor that Fig. 4 provides for the embodiment of the present invention;
The circuit structure diagram of the gyro sensor that Fig. 5 provides for the embodiment of the present invention;
The circuit structure diagram of the second alarm module that Fig. 6 provides for the embodiment of the present invention;
The circuit structure diagram of the power regulator module that Fig. 7 provides for the embodiment of the present invention;
The circuit structure diagram of the first alarm module that Fig. 8 provides for the embodiment of the present invention;
The circuit structure diagram of the first communication module that Fig. 9 provides for the embodiment of the present invention.
Embodiment
Carry out clear, complete description below with reference to accompanying drawing to the technical scheme of various embodiments of the present invention, obviously, described embodiment is only a part of embodiment of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, other embodiments all that those of ordinary skill in the art obtain under the prerequisite not making creative work, all belong to the scope that the present invention protects.
As shown in Figure 1 and Figure 2, scope of activities restricted person supervisory systems comprises pin link point and gateway node two parts, pin link point and gateway node all using CC2530 module as main control chip, wherein gateway node is as Signal reception node, and pin link point is as signal transmitting node.Between the pin link point that monitored person wears and gateway node, periodic communication is got in touch with, and whether movable in monitoring area just can detect monitored person by status information.
The scope of activities restricted person supervisory systems of the embodiment of the present invention utilizes technology of Internet of things to solve video monitoring system Problems existing in supervision of residence.
Invention realizes the auto-alarm function that monitored person departs from guarded region, and solving in video monitor process can not the drawback of automatic alarm.Solution mainly relies on to verify based on RSSI distance exam principle and Gauss and realizes.
Range measurement principle based on RSSI (Received signal strength indication) is, the radio-frequency (RF) signal strength of known signal transmitting node, Signal reception node is according to the signal intensity received, calculate signal propagation losses, then be converted into distance according to theoretical model or empirical model.RSSI finds range formula:
[RSSI]dbm＝A-10nLgd (1)
In formula (1), d is the distance between Signal reception node and signal transmitting node, A is defined as the average energy absolute value received in distance signal transmitting node reference distance, the i.e. signal intensity at 1m place, unit dBm represents, n is routing cost index, and its value depends on surrounding environment and building type.
Use Gauss model to verify RSSI value, obtain the radius of action of monitored person accurately.The ultimate principle of Gauss model verification is that unknown point RSSI when same position may have n value, wherein certainly exists small probability event, utilizes Gauss model to choose the high value of probability, then gets its geometric mean and obtain accurate RSSI value.Decrease the generation of some small probabilities, large interference incident after being verified by Gauss model, enhance the accuracy of range finding, obtain relatively accurate RSSI value, thus make the distance that calculates more accurate.
First, Gauss model screens mainly through gauss of distribution function the value that in RSSI value, probability of occurrence is high, and distribution distribution function is shown below:
F ( x ) = 1 σ 2 π e - ( x - u ) 2 2 σ 2 - - - ( 2 )
Wherein average μ and variances sigma 2can be obtained by (4) formula and (5) formula, wherein X ifor in Gaussian distribution in the probable value of i point.
μ = ⊥ n Σ i = 1 n X i - - - ( 3 )
σ 2 = 1 n - 1 Σ i = 1 n ( X i - μ ) 2 - - - ( 4 )
There will be multiple value at same position, the probability of occurrence of each value is different.According to actual measurement experience, select 0.6 to be in the critical point of same position difference RSSI value probability of occurrence, when gauss of distribution function value is greater than 0.6, think that corresponding RSSI value is high probability occurrence value; When gauss of distribution function value is less than or equal to 0.6, thinks that corresponding RSSI value is small probability random occurrence, so the scope of the rssi measurement value received can be determined, get probability and be more than or equal to the RSSI value that 0.6 is less than or equal to 1, as shown in (5) formula.
0.6 ≤ 1 σ - 2 π B - ( r - μ ) 2 2 σ 2 ≤ 1 - - - ( 5 )
Record X many RSSI value of same position, and the RSSI value belonged within the scope of (5) formula is put into Beacon_val_gauss [] array carry out geometric mean calculating, as shown in (6) formula, wherein n is the number of the RSSI value through screening.
RSSI = 1 n Σ i = 1 n Bbaccn _ val _ gauss [ i ] - - - ( 6 )
Because RSSI range finding is easily subject to the impact of external environment, if a position is only by a RSSI value compute distance values, error is larger.By carrying out geometric mean calculating to the RSSI numerical value in Beacon_val_gauss [] array, the undulatory property that can exist RSSI range finding and randomness suppress, draw the RSSI value that X optimizes, bring in formula (2) and calculate, the more accurate distance value of correspondence can be obtained.
Pin link point is configured with gyro sensor 105 to measure the direction of motion of monitored person, dead reckoning (Dead Reckoning, DR) can be utilized to realize the locating and monitoring function of monitored person.Dead reckoning is from a known coordinate position, and according to carrier at the course of this point, the speed of a ship or plane and hours underway, calculate the navigation procedure X of the coordinate position of subsequent time, formula (8) is its derivation.
X n = X n - 1 + d R n - 1 sin θ n - 1 Y n = Y n - 1 + d R n - 1 cos θ n - 1 θ n = θ n - 1 + d θ n - - - ( 8 )
R in formula n-1with d θ nfor from n-1 moment position (X n-1, F n-1) to n moment position (X n, Y n) displacement vector change and course change.
In supervisory systems, utilize dead reckoning, X can extrapolate the current location of monitored person according to RSSI range measurement and direction of motion, thus the effective activity of the range limited personnel of monitor activities in critical zone.
This scope of activities restricted person supervisory systems comprises: pin link point, gateway node two parts.Wherein pin link point is mainly divided into four major parts: power supply 101, tamper module, second communication module 103.
Power supply 101 mainly selects 3V button cell CR2499, is powered for second communication module 103 by power regulator module 102.Tamper module mainly comprises light sensor 106 and connecting and disconnecting of the circuit.
In process of supervision, monitored people may want to remove pin link point, if when there is no tamper module, in monitored space, pin link point is removed by force, then monitored people can depart from easily and not be found, because gateway node can think that monitored people is also at monitoring range, monitored people departs from scope in fact, so tamper module is necessary.
Add light sensor in systems in which to test light, if pin link point is reported to the police and notification gateway node in illumination to light sensor.So pin link point will carry out encapsulation process in the completed, if monitored people removes and must take off bonnet, such system meeting automatic alarm, makes the second alarm module 104 report to the police.
Meanwhile, if the restricted personnel of scope of activities cut off pin ring X by force, pin link point will be in off state, then lose between pin link point and gateway node and write to each other, gateway node also will be reported to the police, and realize its tamper function.
ZigBee communication module, i.e. second communication module: select CC2530 to communicate, the Received signal strength of ZigBee module is utilized to indicate (Received Signal Strength Indication) i.e. RSSI value to indicate the distance of monitor staff's distance webs articulation point, if monitored personnel depart from scope, then the heartbeat of pin link point and gateway node exchanges and disappears, impel pin link point and gateway node to report to the police, be uploaded to network by gateway node.
Gateway node is divided into four major parts: first communication module 202, GPRS module 203, serial ports turn network interface module 204 and peripheral hardware.
First communication module 202, X selects CC2530 module, mainly receives heartbeat exchange and the RSSI value of the transmission of pin link point, whether analyzes monitored personnel at monitoring range.Monitored personnel are in monitoring range, then pin link point and gateway node carry out normal heartbeat exchange, are received in the RSSI value of certain limit simultaneously; If monitored personnel depart from monitoring range, then the heartbeat of gateway node and pin link point exchanges and disappears, and RSSI value goes beyond the scope simultaneously, then the hummer automatic alarm at gateway node place, and warning message is passed to GPRS module place by serial ports, send short messages and notify user.Or turn network interface module by serial ports directly to upload on the net.
GPRS module 203; The heartbeat that gateway node does not receive pin link point exchanges, and the RSSI value of normal range, then data are sent warning message to GPRS module by serial communication by CC2530 module, the warning message received is sent on internet by GPRS module, directly this information is sent to Surveillance center, notifies related personnel.
Serial ports turns network interface module 204, and by the serial data of CC253O module transfer, (such as alerting signal, under TCP client pattern, according to the setting of oneself after module powers on, initiatively be connected to TCP server server end, then set up X and connect, realize data transparent transmission.Under this pattern, the IP of TCP server needs module visible, and the visible meaning is exactly directly can lead to server ip by PING by the IP at module place, and server end can use fixing IP, also can use the Intranet IP of same LAN (Local Area Network).
Peripheral hardware mainly contains the first alarm module 201, pilot lamp and 5V power interface etc.Pilot lamp is divided into: gateway node binding pilot lamp 205, scope pilot lamp 206, tamper pilot lamp 207 3 class.
Gateway node binding pilot lamp 205: be mainly used in indicating when system starts pin link point whether to add network, whether can carry out data communication with gateway node.
Scope pilot lamp 206: be mainly used in indicating the monitored people wearing pin link point whether in monitoring range.
Tamper pilot lamp 207: be mainly used in the scope that is different from and cross the border use, because be two kinds of different situations when monitored personnel depart from scope or remove this, and sensor node can judge, can monitor it better like this.
Wherein Fig. 3-Fig. 9 shows the circuit structure diagram of modules, can realize scope of activities restricted person supervisory systems of the present invention according to Fig. 1-Fig. 9.
Scope of activities restricted person supervisory systems function is movable in specific scope for limiting monitored personnel, and real-time locating and monitoring, once these personnel surmount particular range, startup is reported to the police by system, warns monitored personnel to send a warning to public security organ simultaneously.
Monitored person is made to carry pin link point, on gateway node, set the scope of activities of monitored person simultaneously, set up the ZigBee-network of star-network topological structure, an i.e. gateway node and multiple pin link point (the corresponding pin link point of next gateway node of generalized case), wherein gateway node is as Signal reception node, pin link point is as signal transmitting node, gateway node detects its RSSI value according to the packet receiving the transmission of pin link point, detect the distance between monitored person and gateway node, thus judge whether it departs from scope.When monitored person departs from monitoring range, warning message is passed on mobile phone by note by gateway node in form, or is passed on the computing machine of overseer by cable network in form, reaches the effect exceeding monitoring range and report to the police.
The range finding based on RSSI between pin link point and gateway node, not only can detect the scope of activities of monitored person, but also effectively can solve the Dead Core Problems of video monitoring appearance.Pin link point is configured with tamper module, and it comprises the tamper of connecting and disconnecting of the circuit road and photosensitive tamper, and monitored person opens or cut off pin link point, and pin link point will be reported to the police, and prevents monitored person from cutting off pin link point and escapes.Gateway node is uploaded alerting signal by wired and wireless network, ensures that Signal transmissions is on the equipment of supervisor.
The above, it is only preferred embodiment of the present invention, not any pro forma restriction is done to the present invention, any those skilled in the art, do not departing within the scope of technical solution of the present invention, make a little change when the technology contents of above-mentioned announcement can be utilized or be modified to the Equivalent embodiments of equivalent variations, in every case be the content not departing from technical solution of the present invention, according to technical spirit of the present invention to any simple modification made for any of the above embodiments, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.

Claims (8)

1. a scope of activities restricted person supervisory systems, is characterized in that, comprises signal transmitting node and Signal reception node;
Described signal transmitting node is used for being fixed on it scope of activities restricted person, for sending radiofrequency signal to described Signal reception node;
After described Signal reception node receives described radiofrequency signal, obtain the RSSI value of described radiofrequency signal, if this RSSI value is not in the RSSI threshold range that described Signal reception node prestores, then send alerting signal.
2. scope of activities restricted person supervisory systems as claimed in claim 1, it is characterized in that, described Signal reception node comprises first communication module, the first alarm module; Described signal transmitting node comprises second communication module, the second alarm module;
Described first communication module receives the radiofrequency signal that described second communication module sends, if the RSSI value of described radiofrequency signal is not in the RSSI threshold range that described Signal reception node prestores, then send alerting signal to described first alarm module and described second communication module;
After described second communication module receives described alerting signal, this alerting signal is sent to described second alarm module.
3. scope of activities restricted person supervisory systems as claimed in claim 2, it is characterized in that, described Signal reception node also comprises GPRS module and serial ports turns network interface module;
Described first communication module starts timing after sending alerting signal, if overtime, then described GPRS module obtains the geographical location information of described signal transmitting node and sends to described first communication module; Described geographical location information and alerting signal are turned network interface module by serial ports and send to Surveillance center by described first communication module.
4. scope of activities restricted person supervisory systems as claimed in claim 3, it is characterized in that, described Signal reception node also comprises gsm module;
Described first communication module is also for sending alerting signal to described gsm module; After described gsm module receives this alerting signal, send this alerting signal to the mobile phone prestored.
5. scope of activities restricted person supervisory systems as claimed in claim 2, it is characterized in that, described signal transmitting node also comprises tamper module;
Described tamper module is used for when described signal transmitting node is removed, and sends alerting signal to described second communication module; Described alerting signal is sent to described second alarm module and described first communication module by described second communication module.
6. scope of activities restricted person supervisory systems as claimed in claim 5, it is characterized in that, described tamper module comprises light sensor;
Described light sensor is arranged in described signal transmitting node; Described light sensor is electrically connected with described second communication module.
7. scope of activities restricted person supervisory systems as claimed in claim 6, is characterized in that, when described first communication module is also for described signal transmitting node open circuit, sends alerting signal to described first alarm module.
8. scope of activities restricted person supervisory systems as claimed in claim 6, it is characterized in that, described signal transmitting node also comprises gyro sensor; Described gyro sensor is used for the motion direction information obtaining described signal transmitting node after described GPRS module obtains geographic position letter.
CN201410698329.XA 2014-11-28 2014-11-28 Supervision system for personnel with limited motion ranges Pending CN104332019A (en)

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CN110069679A (en) * 2019-04-24 2019-07-30 福建工程学院 It is a kind of intelligently to offer a sacrifice to gods or ancestors management method and device

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