CN203050782U - Underground multi-functional personnel positioning distress system - Google Patents
Underground multi-functional personnel positioning distress system Download PDFInfo
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Abstract
The utility model discloses an underground multi-functional personnel positioning distress system, which comprises a positioning server, a monitoring terminal, a wired communication subsystem, a wireless communication base station and a distress device, wherein the wired communication subsystem mainly comprises an optical fiber, a light splitter and a wireless switch; and the wireless communication base station comprises an explosion-proof box, a power source, a standby battery, wireless access equipment, a display subsystem, a control subsystem and a memory subsystem. The wireless communication base stations are arranged underground at a certain distance and are connected with the aboveground wireless switch and positioning server through the optical fiber; the distress device and the wireless communication base stations are in bidirectional communication based on a wireless mode; the distress device can accurately position; the behavior state of personnel using the distress device can be detected in real time, and the system has various distress functions; and the system can support search and rescue when accidents occur in a coal mine and the conventional communication facility is damaged and cannot work, and is a comprehensive system with integrated functions such as underground personnel tracking and positioning, dispatching management and distress, search and rescue after disaster.
Description
Technical field
The utility model relates to the multi-functional personnel positioning distress system in a kind of down-hole.The utility model is specifically related to radio communication, wireless location, technical fields such as signal processing.
Background technology
The personnel in the pit location is the important measures of safety in production.People adopt the whole bag of tricks down-hole personnel position to detect for many years.
Actual use is based on REID (RFID) at present, and RFID utilizes RF-wise to carry out the noncontact two-way communication, to reach identifying purpose and swap data.Different with other contact recognition technology, need not contact between the radio-frequency card of rfid system and the read write line and just can realize automatic identification and the position monitoring under different conditions to personnel or object.Typical radio-frequency recognition system mainly comprises radio-frequency card and read write line two parts.Use RFID to have following problem:
1. positioning accuracy is low, and positioning accuracy is limited by the read write line distribution density, can only realize zone location, can not accomplish that error is several meters accurate location;
2. be prone to skip, limited by the RFID read or write speed, can not handle many people quick situation by card-reading system simultaneously.
Based on the navigation system of Zigbee wireless sensor network, as the CC2431 of the band hardware positioning engine of TI company, there is following problem in this engine of positioning based on the RSSI technology in the actual use in down-hole:
1. the loss model of wireless signal is affected by environment huge, and Zigbee uses the field intensity location algorithm, so be subjected to interference easily to cause locating inaccurate greatly;
2.Zigbee the hardware positioning engine of communication chip inside is applicable to the plane positioning environment, the down-hole mostly is the wire environment that the tunnel is formed, and is different from the plane positioning environment of clearing, the practical application existing problems;
3. the active state that existing navigation system and positioner can't the checkout gear wearers;
4.Zigbee wireless communication distance is shorter, can't satisfy the system communication requirement of down-hole long span, has difficulties in concrete engineering construction.
Existing position system function is single, the accident that meets accident in the down-hole, and personnel are stranded, and communication system breaks down or when paralysing, and existing positioning terminal equipment can not automatic calling for help, can not provide rescue required function support in real time.
WI-FI be a kind of can be with computer and mobile device with the interconnected technology of wireless mode, be by Wireless Ethernet CompatibilityAlliance, the Radio Transmission Technology standard (IEEE802.11) of WECA issue, comprise IEEE802.11a before the IEEE802.11 standard mesh, IEEE802.11b and IEEE802.11g.Can support wireless network to insert in hundreds of feet scopes, the WI-FI wireless network can be formed wireless network by AP (Access Point) and wireless network card; Convenient and existing wired ethernet network is integrated, and the cost of networking is low.WI-FI is applied in more areas with himself plurality of advantages, and the WI-FI of mine uses and also obtained very fast development at present.So adopting, call device described in the utility model has the more WI-FI communication mode of open environment and more wide development prospect.
" Ad hoc network " is that a kind of special self-organizing of formulating of IEEE802.11 standard committee is to equation multi-hop mobile communications network, in Ad hoc network, node has the message transfer capability, the forwarding of a plurality of intermediate nodes is passed through in communication between node possibly, namely pass through multi-hop (MultiHop), this is Ad-Hoc network and other mobile networks' fundamental difference.Node is coordinated mutually by procotol and the distributed algorithm of layering, has realized automatic tissue and the operation of network.Therefore it is also referred to as multi-hop wireless net (MultiHop Wireless Network), self-organizing network (SelfOrganized Network) or infrastructureless network (Infrastructureless Network), and the module of WI-FI wireless network is supported the Adhoc network simultaneously mostly.
The utility model content
The utility model purpose is to provide the multi-functional personnel positioning distress system in a kind of down-hole can detect call device user of service's active state in real time, has automatic vital movement feature detection warning function; And can be in the mine accident that meets accident, the existing communication facility is damaged and can't work the time, searches automatically to connect the Ad hoc network that search and rescue device is set up, and transmits identity and vital movement feature relevant information from the trend search and rescue device; Calling for help means such as sound and light are provided in addition, have increased the probability of being rescued of trapped personnel, be beneficial to the raising search efficiency.The multi-functional personnel positioning distress system in described down-hole is realized by following scheme:
The multi-functional personnel positioning distress system in described down-hole comprises: location-server, monitor terminal, wire communication subsystem, radio communication base station and call device; The wire communication subsystem comprises optical fiber, optical splitter and wireless exchange board; Radio communication base station comprises explosion-proof tank, power supply, reserve battery, radio reception device, antenna isolator and antenna; Call device comprises: processor, wireless communication unit, button, storage, LCD display, LED light, sounding component, temperature pick up, motion detection circuit and power circuit; The wireless communication unit of call device comprises wireless communication module and antenna; The motion detection circuit of call device adopts 3-axis acceleration sensor; The installation radio communication base station that keeps at a certain distance away in the down-hole, radio communication base station connects aboveground wireless exchange board and location-server by optical fiber; Call device is communicated by letter by wireless mode with radio communication base station, realizes the two-way communication with location-server; Call device is accurately located apart from realization based on the pacing of field intensity positioning combination meter; Call device detects in certain hour less than physical activity and then reports to the police automatically by 3-axis acceleration sensor detection record user of service walk step number and its vital movement feature of monitoring; Call device by Ad hoc network from the special-purpose search and rescue device that is dynamically connected, by making the rescue worker can obtain position, identity and the active state of trapped personnel with the search and rescue device two-way communication.
This system further comprises: call device processor control wireless communication unit is from being dynamically connected search and rescue device, when call device a period of time fails to connect into intrinsic wireless network, enter the emergency search condition, from the Ad hoc network that is dynamically connected by search and rescue system device tissue, and to information such as search and rescue device transmission signal strength, ID and the last activity times, make search and rescue system obtain position, identity and the active state of trapped personnel.
This system further comprises: call device uses automatic or manual mode and the two-way communication of search and rescue system device, after call device and search and rescue device connect, the user of service can operate call device and send built-in information to the search and rescue system device, receives the information that search and rescue device sends.
This system further comprises: the processor real-time of call device detects button operation, records the last button operation time, when the call device radio communication, sends interocclusal record this moment with packets of information.
This system further comprises: the processor real-time human body activity of call device, when the processor certain hour does not detect any physical activity or then triggering warning automatically of button operation, outwards transmit warning by radio communication and acousto-optic mode, enter the calling for help state.
This system further comprises: when call device enters emergency search condition or the state of calling for help, send international standard three short three long three short SOS distress calls by processor control sounding component.
This system further comprises: when call device enters emergency search condition or the state of calling for help, send international standard three short three long three short SOS distress calls by processor control LED light.
This system further comprises: call device detects call device place environment temperature by temperature-sensitive element or the built-in temperature detecting unit of controller, and temperature information is uploaded to aboveground server together with locating information by radio communication.
This system further comprises: the processor control wireless communication unit of call device is realized downlink communication, receives communication with dispatch instructions and information warning that location-server issues, and is stored in the storage chip, reminds the wearer to read by acousto-optic hint simultaneously.
This system further comprises: the uplink information that call device sends is just often uploaded in real time at communication link, and when communication link was obstructed, processor for recording is operation this time, and communication link is just often uploaded automatically again by the time.
Description of drawings
Fig. 1 distress system is implemented schematic diagram
Fig. 2 call device hardware structure diagram
Fig. 3 call device control system block diagram
The environment temperature testing process figure of Fig. 4 call device
The automatic vital movement monitoring of Fig. 5 call device flow chart
Fig. 6 call device TCP connects the automatic calling for help flow chart
Fig. 7 call device UDP mode automatic calling for help flow chart
Fig. 8 call device location operational flowchart
Fig. 9 personnel in the pit's direct of travel is judged principle schematic.
The distance operation schematic diagram of Figure 10 call device and radio communication base station.
Figure 11 call device current position coordinates computing schematic diagram.
Wherein, 1, location-server; 2, radio communication base station; 3, call device; 4, monitor terminal; 5, wireless exchange board.
The specific embodiment
Below in conjunction with the drawings and the specific embodiments the utility model is further described.
As shown in Figure 1, mine shaft wireless communications system:
The multi-functional personnel positioning distress system in down-hole comprises: location-server (1), wire communication subsystem, radio communication base station (2).The wire communication subsystem is the backbone of whole navigation system, and the wire communication subsystem is main transmission medium with optical fiber.The wire communication subsystem also comprises optical splitter, wireless exchange board network management devices such as (5).Keep at a certain distance away in the down-hole radio communication base station (2) is installed, radio communication base station connects aboveground server by optical fiber.The radio communication base station major function is the WI-FI wireless access, and radio communication base station mainly comprises power supply, reserve battery, radio reception device, antenna isolator and and antenna.Radio reception device is called AP (Access Point) in standard WI-FI network, be responsible for wireless terminal device and insert wired ethernet, by radio communication base station the WI-FI WLAN is covered each tunnel.Each AP is assigned service set identifier SSID and different physical address, navigation system is according to the different radio communication base station of sign difference of AP, radio communication base station is supported the trans-regional roaming of wireless terminal device, radio communication base station is used as location reference point when the computing of location simultaneously, the positional information of radio communication base station and identification information are stored in the storage subsystem of location-server and call device, for the location computing provides foundation.Call device inserts the WI-FI WLAN as standard WI-FI terminal device and communicates by letter with aboveground location-server.Location-server is responsible for system communication management, data storage and the information service of personnel and equipment is provided for monitor terminal.The production management personnel are by the real-time monitoring of monitor terminal (4) visit location-server realization to underground work personnel and relevant device, monitor terminal has map and shows, location of personnel and data show inquiry, the location of personnel statistics, and historical position is followed the trail of functions such as inquiry.Geographical information platform can use MapX mapable assembly, and the mine map is the map vector of tunnel two dimensional cross-sectionization, and map file is the MapInfo form.
In embodiment illustrated in fig. 2, call device hardware is formed and is comprised with the lower part:
1. processor (206) is selected the MSP430F147 single-chip microcomputer of TI company.This model is 16 risc architectures, has 32kFlash, 1kRAM; And 5 kinds of low-power consumption modes are arranged, abundant sheet inner peripheral module, plurality of advantages such as clock system flexibly.MSP430F147 can work under 1.8～3.6V low-voltage, and system adopts the 3.3V operating voltage.The built-in precision of MSP430F147 is the A/D converter of 12 200kps.1 non-linear differential error, 1 non-linear integral error, 4 kinds of analog-to-digital conversion patterns.
2.WI-FI communication (207) part comprises WI-FI communication module and antenna, the WI-FI communication module adopts and encrypts networking control chip CO2128 with the iChip series of ConnectOne company is the product of the scheme of core, and inside modules comprises radio-frequency module, communication interface modules, state control and detection module, memory; Antenna adopts flexible antennas.
3. button (204) control circuit is made up of 4 buttons, adopts independent button keyboard, in conjunction with the display interface of display screen, realizes the switching of each function and state.
4. storage (205) chip adopts 1 24C512, because call device only uses a storage chip, chip select address need be set, so the sheet of 24C512 clicks the whole ground connection of pin.24C512 uses the I2C bus communication,, use two standard I/O interfaces to add and draw resistance to connect SCL and SDA pin, realize processor and storage chip Control on Communication.
5.LCD display screen (201) adopts two row dot matrix type LCD MODULEs, have characteristics such as low in energy consumption, that the supply voltage range is wide, ken size: 60.5 * 18.0mm, 54.8 * 18.3mm, processor shows data by 8 I/O mouths to the Liquid Crystal Module transmission, drives the control Liquid Crystal Module by 4 I/O mouths in addition.
6.LED indicator lamp (202) adopts two paster LEDs, be respectively red and green, green as the system mode indication, state comprises power supply indication and charging indication etc., red LED is indicated as information state, and state comprises information indication, warning indication and calls for help indication etc.
7. temperature pick up (211) hardware components comprises thermo-sensitive resistor and wheatstone bridge, thermo-sensitive resistor has good linearty, and precision height, good reliability,. by the resistance variations of wheatstone bridge measurement as the thermo-sensitive resistor of temperature-sensing element (device), thermo-sensitive resistor directly is converted to the variation that bridge is pressed as one of them arm resistance with the changes in resistance amount.The module kernel of the ADC12 of MSP430147 shares, and finishes respectively by the analog switch of front end and gathers input.So the brachium pontis optional arbitrary mouth that connects 12 AD analog quantity inputs in thermo-sensitive resistor place is pressed for detection of bridge and is changed, and needs carry out software filtering by processor for detected signal.MSP430F147 Chip Microcomputer A/D conversion reference data voltage can use the reference data voltage of outside input, and the reference data voltage that also can use internal reference voltage generator to produce can be finished the initialization setting by the ADC12CTL control register is set.Owing to use the single-chip microcomputer internal reference voltage can increase the power consumption of processor, consider for the Design of power saving of device, select external reference voltage for use, with the working time of assurance device
8. motion detection circuit (210) uses the SMB380 3-axis acceleration sensor, the vibration that traditional mechanical type pedometer adopts reed or elastic force bead to detect and goes on foot generation when the people walks judges that by internal processor electronic impulse realizes that meter goes on foot, adopt this mode can't distinguish walking and other movable vibration that produces, sensitivity and accuracy are not high.Use 3-axis acceleration sensor can measure three orthogonal axles and in the centrifugal force scope, keep static state and dynamic acceleration on the absolute direction, can detect the vibration that general physical activity produces, the signal of gathering is data signal, and collection result is transferred to processor by the SPI interface.
9. serial communication (208) uses the MAX232 chip rs-232 standard serial ports single supply electrical level transferring chip of TI company, use+5v single power supply, and interface uses the SMT2.5 socket, can use transit cable to connect computer 9 needle serial ports and realize communication.
10. power circuit (209) part comprises battery, voltage transitions and battery management part; battery uses lithium-ions battery; lithium battery (group) should have anti-reverse function; have outside the internal protection circuitry; have outer holding circuit is arranged; possess anti-overcharge, prevented putting, functions such as overcurrent, short circuit, also have equalizaing charge, balanced discharge function.Voltage transitions adopts the MAX1724 power supply chip.
Among the embodiment, the system of call device forms and comprises as shown in Figure 3:
1. positioning subsystem (302), be responsible for gathering peripheral WI-FI access point to the signal strength of module from the WI-FI communication module, and according to the positional information of field intensity signal, access point, obtain the position of call device in conjunction with the personnel's of wearing step-length step number computing, be uploaded to location-server by communication subsystem.
2. communication subsystem (303) is responsible for and the communicating by letter of server and external device, and comprises the control of WI-FI radio communication, and serial communication is controlled.The communication protocol of call device comprises two parts: first is external protocol, is the communication protocol between call device and aboveground server; Second portion is internal agreement, is the processor of call device and the agreement of Wi-Fi module, and producer's difference of Wi-Fi module then this agreement is also different.Wherein first's agreement is the important component part of call device system design, can independently define, and it does not rely on concrete Wi-Fi equipment and module manufacturer.The based on network application layer of the realization of external protocol is on the tcp/ip layer, and data link adopts TCP or UDP mode, and the external communication protocol structure is divided into information header and the information content.Information header comprises frame head, device id, and frame total length (containing information header and imformosome), frame type, 4 contents of frame serial number take double byte length respectively.The external protocol content can be according to the functional requirement expansion of system.
3. acquisition subsystem (301) is responsible for the collection of call device input signal, comprising: the collection of temperature information collection, motion detection signal, the step computing of voltage acquisition meter and actuation of keys collection.Be responsible for the acquisition process of 3-axis acceleration sensor signal, use the acceleration signal on three directions of buffer memory, X is the value of X-direction, Y is the value of Y direction, Z is the value of Z-direction, getting the axle of velocity variable maximum counts the step, according to the statistical measurement common people run per second be no more than 5 the step, low-speed running is not less than 1 step of per second, can be with the effective range of 0.5-5Hz as the signal in meter step, remove high-frequency noise by LPF, data realize the accurately meter step through computing such as characteristic matching on reference to other axle.Use the method meter step not limited by the call device wearing position, the user of service can be contained in the optional position with oneself with call device, as the clothing pocket of packing into up and down, is fixed on the waistband or in the knapsack, all can accurately counts the step.By three data analysis, also can detect other human motion simultaneously.
4. display subsystem (304) is responsible for the driving of LCD screen of call device and the demonstration of information.
5. RACS (305), hardware cells such as buzzer, LED, the LCD that is responsible for the control call device is backlight, power supply are realized function separately.
6. storage subsystem (306) is responsible for communicating by letter between control call device and the storage chip, realizes storage and the read operation of data.Canned data comprises schedule information, the warning message that prestores, positional information and ambient temperature information etc.
In embodiment illustrated in fig. 4, call device real time temperature collection implementation process example is as follows:
Call device has the real time temperature acquisition function, the conversion value that processor reads temperature A/D deposits internal memory (401) in, change the conversion times of stipulating (402) as arriving after the multiple conversions, depositing A/D conversion value is carried out software filtering (403), filtering algorithm adopts simple and effective limit filtration algorithm in conjunction with the arithmetic average filtering algorithm, namely determine the maximum deflection difference value P that double sampling allows, x
nBe this collection value, x
N-1For collection last time value, as x
n-x
N-1Then this time the collection value is effective for≤P, otherwise abandons this sub-value, uses sub-value and replaces, be i.e. x
n=x
N-1, can effectively remove the impulse disturbances that accidentalia causes through limit filtration, carry out arithmetic average filtering in the time of limit filtration, with x
1... x
nThe computing of averaging of n collection value
Then will go up the average x that obtains of step computing and bring the realistic border of calibration equation temperature value (404) into; Position computing (405), send display subsystem to show (406) temperature value, deposit temperature value, position and data acquisition time in storage chip (407); Judge wireless communication link whether normal (408), as communication link normally with temperature and accurately positional information according to external protocol upload onto the server again (409) of packing; As communication link not general rule continue gatherer process, when recovering to communication link institute's deposit data is not sent data and is sent to server.
In embodiment illustrated in fig. 5, the automatic vital movement monitoring of call device implementation process example is as follows:
Call device has automatic movable feature detection warning function, when the personnel that wear call device carry out normal operation, 3-axis acceleration sensor can be responded to the personnel activity, handle simultaneously and detect button operation (501), the human motion triggered time of sensing or button operation time (502) that system's record is last, as arrive and regularly report bit time (503), call device positions calculating (504), report this time record (505) with locating information, when 3-axis acceleration sensor does not detect human motion or button operation for a long time, namely detect overtime 507, then call device enters alerting automatic telling status (508), send position and last detected human motion time to location-server at once, call device waits the affirmation information (510) that server is beamed back after sending warning message, does not receive the confirmation then repetition of alarms acousto-optic calling for help (508) simultaneously of information at the appointed time.
In embodiment illustrated in fig. 6, the special-purpose search and rescue device of search is as follows with calling for help implementation process example automatically under TCP connection communication mode for call device:
Call device is set up TCP with aboveground server communication both sides in client-server end mode and is connected (601), call device is as client Connection Service device fixed ip address and port, server end is that server side uses fixed ip address and fixed port, and up-downgoing information is transmitted based on the TCP link channel.When not having transfer of data on the link channel, call device should send link detecting packet (603) every time S (602) and connect to keep TCP, system picks up counting and do not receive answer (604) after the link detecting packet sends overtime K, sends link detecting bag (603) immediately again; Do not receive yet that after continuously sending R time (605) answer judges that then link is invalid, data receiver initiatively disconnects this connection (614) repetition TCP connection procedure (601); If TCP fails successful connection, then reconnect network, as connecting network (606) yet G time and then enter the search pattern (608) of crying for help automatically surpassing, communication subsystem arranges the WI-FI communication module and enters search search and rescue device state, and call device is supported the ad hoc mode networking of WI-FI under this state; Call device acousto-optic is simultaneously called for help (609), and controller control buzzer and LED send ...---... three short three long three short S.O.S. international morse code Maydays are convenient to rescue worker's detecting rescue; Be connected with location-server TCP not as call device that number of success (606) does not reach G time, then in LCD screen display reminding information, the user of service can enter help-asking mode (608) with manually controlling call device by the special function keys of call device often; Near the signal of search and rescue device call device searches, the Ad hoc network that adds the search and rescue device tissue, automatically obtain the search and rescue device IP address allocated, be connected to search and rescue device (610) by TCP, detect search and rescue device signal strength (611), send information (612) such as field intensity, call device identity and last human motion time to search and rescue device by the TCP interface channel, H blanking time (613) back duplicate detection field intensity (611) and transmission information (612) process; Repeat acousto-optic if call device does not detect the search and rescue device signal and call for help (609) continuation search search and rescue device signal.Also can initiatively regularly detect link as data receiver's server, what overtime S1 did not receive call device uploads data or link detecting packet, then judges link failure, initiatively disconnects the connection of call device therewith.When parameter S, K, R, G, H, S1 can set according to link condition, with reference to value be: S=3min, K=30s, R=3, G=8, H=10s, S1=6min.
In embodiment illustrated in fig. 7, the search search and rescue device is as follows with calling for help implementation process example automatically under the UDP communication mode for call device:
Call device is communicated by letter in the UDP mode with aboveground server both sides, the call device end transmits and receive data and uses two heterogeneous networks ports, server end uses the fixed network port to communicate by letter with all call devices, after the call device opening initialization system, parameter (701) such as udp port at first is set receives serve port with server end and set up corresponding relation, set up transmission channel.When not having transfer of data, call device should send link detecting packet (703) to keep the UDP passage every time S (702), system picks up counting and do not receive answer (704) after the link detecting packet sends overtime K, sends link detecting bag (703) immediately again; Do not receive yet that after continuously sending R time (705) answer judges that then link is invalid, data receiver initiatively discharges this connection (714) repetition udp port setting up procedure (701); As repeat udp port setting up procedure (701) and then enter the search pattern (708) of crying for help automatically surpassing still can't to communicate by letter for G time, communication subsystem arranges the WI-FI communication module and enters search search and rescue device state, and call device is supported the networking of ad hoc mode under this state; Call device acousto-optic is simultaneously called for help (709), and controller control buzzer and LED send ...---... three short three long three short S.O.S. international morse code Maydays are convenient to rescue worker's detecting rescue; Near the signal of search and rescue device call device searches, the Ad hoc network of adding search and rescue device tissue obtains the search and rescue device IP address allocated automatically, is connected to search and rescue device (710) by the TCP mode; Detect search and rescue device signal strength (711); Send information (712) such as field intensity, call device identity and last human motion time to search and rescue device; H blanking time (713) back duplicate detection field intensity (711) and transmission information (712) process.Repeat acousto-optic if call device does not detect the search and rescue device signal and call for help (709) continuation search search and rescue device signal; Be connected with server TCP not as call device that number of success (706) does not reach G time, then in LCD screen display reminding information, the user of service can enter help-asking mode (708) with manually controlling call device by the special function keys of call device often.Parameter S, K, R, G, H can set according to link condition, with reference to value are: S=3min, K=30s, R=3, G=8, H=10s.
In embodiment illustrated in fig. 8, the implementation procedure of personnel positioning is as follows:
In the call device systems soft ware initial procedure, at first the height record T according to the call device user of service who stores obtains its actual step size (801) by following formula:
N＝1.85(T-132)
The field intensity (802) that call device periodic monitor and each radio communication base station transmit, when the personnel in the pit carries the call device walking near radio communication base station, field intensity is to peaking, with the position of this radio communication base station current location as call device, as once reliably locating storage radio communication base station numbering, this position as when prelocalization reference point (803), is begun the meter step simultaneously.The step number M of call device real time record personnel through walking behind the radio communication base station multiply by the personnel's that wear call device that self store individual step-length, can obtain the distance (804) of personnel and prelocalization reference point; If step number is M, step-length is N, and then call device with the distance L of working as the prelocalization reference point is:
L＝MN
Direction is judged (805), as shown in Figure 9, judge personnel in the pit's (904) direct of travel according to the reliable locator data of the last time of recording, the radio communication base station of accurately locating as last time is A (901), this time accurately the radio communication base station of location is B (902), and the direct of travel that then can judge personnel is to be moved to wireless base station B direction by radio communication base station A; Also can judge direction according to the field intensity variation tendency of the detected radio communication base station of call device (3), detect the field intensity of two adjacent wireless base stations when call device, as the field intensity variation tendency that detects radio communication base station B (902) is to diminish gradually, and the field intensity variation tendency of radio communication base station C (903) is to become big gradually, judges that then direct of travel is to be moved to radio communication base station C direction by radio communication base station B; Error judgment (806), according to the next one location reference point on personnel's direct of travel judgement moving direction of wearing call device, greater than when the distance between prelocalization reference point and the next location reference point, illustrate then that there is error in this distance value as the value of distance L, as with reference to being worth; Detect the signal strength value Rd1 when prelocalization reference point place radio communication base station (902) and next location reference point place radio communication base station (903), Rd2 (807); Calculate distance (808) according to field intensity, with field intensity bring into the following formula of substitution obtain call device and radio communication base station (902) and (903) apart from d1, d2.
A is that signal is propagated the power that 1m receives signal when far away in the formula;
N is that propagation factor is also referred to as loss index, and its numerical values recited depends on the propagation of wireless signal environment;
Rd is the signal strength signal intensity of the radio communication base station that receives of call device, i.e. RSSI value;
X
δGaussian distribution normal random variable for zero-mean
As shown in figure 10, get d1, d2, the value at three public parts of distance common factor of L center is as the d (809) of call device with the distance of working as prelocalization reference point place radio communication base station (902); Call device is arrived the curvilinear equation of tunnel on map apart from d substitution two radio communication base station places of working as prelocalization reference point place radio communication base station (902), can obtain the current coordinate (810) of call device, as shown in Figure 9, the tunnel of establishing two radio communication base station places is respectively (x for line endpoints always
1, y
1), (x
2, y
2), will apart from d and two point form linear equation solve an equation namely obtain the call device coordinate (x, y)
, the position computing is finished in conjunction with map vector data by location-server.
Claims (10)
1. the multi-functional personnel positioning distress system in down-hole comprises: location-server, monitor terminal, wire communication subsystem, radio communication base station and call device; The wire communication subsystem comprises optical fiber, optical splitter and wireless exchange board; Radio communication base station comprises explosion-proof tank, power supply, reserve battery, radio reception device, antenna isolator and antenna; Call device comprises: processor, wireless communication unit, button, storage, LCD display, LED light, sounding component, temperature pick up, motion detection circuit and power circuit; The wireless communication unit of call device comprises wireless communication module and antenna; The motion detection circuit of call device adopts 3-axis acceleration sensor; The installation radio communication base station that keeps at a certain distance away in the down-hole, radio communication base station connects aboveground wireless exchange board and location-server by optical fiber; Call device is communicated by letter by wireless mode with radio communication base station, realizes the two-way communication with location-server; Call device is accurately located apart from realization based on the pacing of field intensity positioning combination meter; Call device detects in certain hour less than physical activity and then reports to the police automatically by 3-axis acceleration sensor detection record user of service walk step number and its vital movement feature of monitoring; Call device by the Adhoc network from the special-purpose search and rescue device that is dynamically connected, by making the rescue worker can obtain position, identity and the active state of trapped personnel with the search and rescue device two-way communication.
2. distress system according to claim 1, it is characterized in that: call device processor control wireless communication unit is from being dynamically connected search and rescue device, when call device a period of time fails to connect into intrinsic wireless network, enter the emergency search condition, from the Adhoc network that is dynamically connected by search and rescue system device tissue, and to information such as search and rescue device transmission signal strength, ID and the last activity times, make search and rescue system obtain position, identity and the active state of trapped personnel.
3. distress system according to claim 1, it is characterized in that: call device uses automatic or manual mode and the two-way communication of search and rescue system device, after call device and search and rescue device connect, the user of service can operate call device and send built-in information to the search and rescue system device, receives the information that search and rescue device sends.
4. distress system according to claim 1 is characterized in that: the processor real-time of call device detects button operation, records the last button operation time, when the call device radio communication, sends interocclusal record this moment with packets of information.
5. distress system according to claim 1, it is characterized in that: the processor real-time human body activity of call device, when the processor certain hour does not detect any physical activity or then triggering warning automatically of button operation, outwards transmit warning by radio communication and acousto-optic mode, enter the calling for help state.
6. according to claim 2 or 5 described distress systems, it is characterized in that: when call device enters emergency search condition or the state of calling for help, send international standard three short three long three short SOS distress calls by processor control sounding component.
7. according to claim 2 or 5 described distress systems, it is characterized in that: when call device enters emergency search condition or the state of calling for help, send international standard three short three long three short SOS distress calls by processor control LED light.
8. distress system according to claim 1, it is characterized in that: call device detects call device place environment temperature by temperature-sensitive element or the built-in temperature detecting unit of controller, and temperature information is uploaded to aboveground server together with locating information by radio communication.
9. distress system according to claim 1, it is characterized in that: the processor control wireless communication unit of call device is realized downlink communication, receive communication with dispatch instructions and information warning that location-server issues, and be stored in the storage chip, remind the wearer to read by acousto-optic hint simultaneously.
10. distress system according to claim 1 is characterized in that: the uplink information that call device sends is just often uploaded in real time at communication link, and when communication link was obstructed, processor for recording is operation this time, and communication link is just often uploaded automatically again by the time.
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| CN2012206214602U CN203050782U (en) | 2012-11-19 | 2012-11-19 | Underground multi-functional personnel positioning distress system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102979578A (en) * | 2012-11-19 | 2013-03-20 | 中国矿业大学(北京) | Downhole multifunctional personnel location distress system |
| CN104020464A (en) * | 2014-05-29 | 2014-09-03 | 燕山大学 | Hybrid positioning system based on accelerometer and wireless range finding technology, and positioning method thereof |
| CN113446061A (en) * | 2021-07-14 | 2021-09-28 | 上海六梓科技有限公司 | High-precision personnel positioning method |
-
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- 2012-11-19 CN CN2012206214602U patent/CN203050782U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102979578A (en) * | 2012-11-19 | 2013-03-20 | 中国矿业大学(北京) | Downhole multifunctional personnel location distress system |
| CN104020464A (en) * | 2014-05-29 | 2014-09-03 | 燕山大学 | Hybrid positioning system based on accelerometer and wireless range finding technology, and positioning method thereof |
| CN113446061A (en) * | 2021-07-14 | 2021-09-28 | 上海六梓科技有限公司 | High-precision personnel positioning method |
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