JP2000278203A - Rescue contact system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rescue contact system that immediately informs a guard headquarters about a site requiring rescue in the case that a user encounters a crime and requests rescue and allows guards to dispatch to the user. SOLUTION: This rescue contact system is provided with an emergency signal transmitter 4 that is carried by a user and transmits a radio wave carrying an identification number multiplexed thereon when the user depresses an emergency switch 3, a plurality of base stations K1-Kn that are dispersed over an available area, an emergency signal receiver 6 that is installed in each base station and a guard headquarters unit 8 that calculates a position of a user on the basis of information from each base station, and also with a search signal transmitter 10 that is carried by a guard who is dispatched by a command of a guard headquarters where the guard headquarters unit 8 is installed, a search signal receiver 12 that is carried by a user, receives a search signal and rings an alarm tone generator 11, and a distance detection emergency signal receiver 13 that is carried by a guard and receives an emergency signal. The user depresses the emergency switch 3 in an emergency where the user desires rescue to transmit the emergency signal.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system in which, when a user is involved in a crime or the like, the user is notified to the security headquarters using a wireless network, and the security headquarters sends the security guard to the user. It relates to a rescue communication device for preventing crime and the like.

[0002]

2. Description of the Related Art Conventionally, there is known a security buzzer that sounds when a user encounters a crime to notify surrounding people. When a crime occurs and a security buzzer sounds, it may be helpful if people around you hear the sound of the security buzzer, but the psychology of the criminal may be caught by the people who gathered by the sound If not, a situation that hurts will occur.

[0003]

In any case, in the conventional security buzzer, there must be a person who can take over the culprit. Therefore, if the user is walking alone and the security buzzer sounds, the criminal will panic and the progress of the crime will be accelerated. There was a problem of suffering damage.

[0004] The present invention is to solve the above-mentioned problem, and when a user encounters a crime or the like, immediately informs the security headquarters of the location and directs the security staff to the user. It is an object of the present invention to provide a rescue liaison device that can perform the rescue communication.

[0005]

A rescue communication device according to the present invention comprises: a user who seeks rescue in a specific area;
A plurality of base stations installed at an appropriate distance in the area, a security headquarters that analyzes information gathered from the base stations and issues instructions to security personnel, and a rescue contact device using a wireless network connecting security personnel An emergency signal transmitter carried by a user and transmitting an emergency signal including an identification number on a radio wave, and an emergency signal installed at a base station and receiving an emergency signal transmitted from the emergency signal transmitter, Based on the emergency signal receiver that obtains the information of the identification number and radio field intensity, and the radio field intensity information collected from the emergency signal receiver of each base station installed at the security headquarters,
A security headquarters device that identifies the current location of the user, a search signal transmitter that is carried by the security guard and transmits a weak search radio wave,
A search signal receiver having an alarm sound generator that generates an alarm sound when a user carries and receives a search radio wave, and a security guard carries the radio wave transmitted from the emergency signal transmitter, Based on the direction of the transmission point of the radio wave and the strength of the radio wave,
And a distance detection emergency signal receiver for detecting a distance to the user.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a system configuration diagram of a rescue communication device 1 according to the present invention. The rescue communication device 1 of the present invention is carried by a user subscribing to the rescue communication system, and an emergency signal including an identification number assigned to each user is placed by pressing an emergency switch 3 provided there. An emergency signal transmitter 4 for transmitting radio waves, a plurality of base stations K1 to Kn installed at appropriate distance intervals, an emergency signal receiver 6 installed in the base stations K1 to Kn, and an emergency signal receiver 6 A signal transmission unit 7 for transmitting a signal including information on the output identification number and radio field intensity, and a signal from the signal transmission unit 7 of each of the base stations K1 to Kn are received, and the information is analyzed to determine the position of the user. Security headquarters device 8 installed at the specified security headquarters
A standby radio, or a business radio carried by a guard who patrols the vicinity, and a search signal transmitter 10 carried by the guard and sending a search signal with a radio wave reach of about 10 meters, Each user carries a search signal receiver 12 that receives a search signal and sounds an alarm sound generator 11 when a search signal transmitter 10 of a security guard approaches, and a security guard carries an emergency signal. Based on the strength of the radio wave from the transmitter 4,
And a distance detection emergency signal receiver 13 for detecting the distance to the user.

Next, the details of each component will be described. As shown in the block diagram of FIG. 2, the emergency signal transmitter 4 includes an emergency switch 3 operated by a user in an emergency, an identification signal storage unit 42 for storing identification number data, and an identification signal transmitted from the identification signal storage unit 42. An identification signal output unit 43 for outputting a signal of a number to a modulator 44, a modulator 44 for modulating a high frequency oscillated by an oscillator 45 with a signal of an identification number, an oscillator 45 for oscillating a high frequency, and a high frequency for amplifying a modulated high frequency signal It comprises an amplifier 46, a high-frequency filter 47 for passing only high-frequency signals in a specific frequency range, and an antenna 48 for transmitting radio waves.

The emergency signal transmitter 4 is carried by a user who has subscribed to the rescue communication system, and when the user is involved in a crime, the emergency switch 3 starts the user to contact the security headquarters. By pressing, a radio wave carrying an identification number given to each user is transmitted. In the standby state where the emergency switch 3 is not pressed, the emergency switch 3
Only the switch circuit for detecting N / OFF is energized to reduce battery consumption. The emergency signal receivers 6 installed in the base stations K1 to Kn receive the radio waves transmitted by the emergency signal transmitter 4, but if a certain number of the base stations K1 to Kn are installed in the use area, the emergency signal transmitters 4 The transmission output of is weak and can be used.

The base stations K1 to Kn are installed at intervals of several hundred meters in a city, and at intervals of several kilometers in a rural area. The structure of the base stations K1 to Kn is about the size of the receiving part of the handy transceiver, and does not depend on the installation location. The base stations K1 to Kn are provided with an emergency signal receiver 6 for receiving a radio wave bearing an identification number, and a signal transmission unit 7 for transmitting information on the identification number and the radio wave intensity to the security headquarters at regular intervals.

As shown in the block diagram of FIG. 3, the emergency signal receiver 6 receives an antenna 61 for receiving a radio wave of a specific frequency including the emergency signal, a high frequency filter 62 for passing only the received high frequency signal, and amplifies the high frequency signal. High frequency amplifier 6
3. A mixer 6 that mixes the amplified received signal with a specific high-frequency signal from a local oscillator 66 and converts it into an intermediate frequency signal.
4. a detector 65 for detecting the output signal of the mixer 64; a frequency control circuit 6 for controlling the oscillation frequency of the local oscillator 66
7, a local oscillator 66 that oscillates a high frequency, a data demodulation circuit 68 that demodulates an identification number from an output signal of the detector 65, an identification signal storage unit 70 that stores a predetermined identification signal in advance,
An identification signal comparing section 69 for comparing the identification number demodulated by the data demodulation circuit 68 with the identification number stored in the identification signal storage section 70; a level detector 71 for detecting the intensity of the received radio wave; An A / D converter 72 for converting the output into a digital signal,
Receives the radio signal of the emergency signal including the identification number transmitted from the device, and outputs the information of the identification number and the radio field intensity obtained from the received signal to the signal transmission unit 7.

The signal transmission unit 7 transmits the information of the identification number and the radio wave intensity sent from the emergency signal receiver 6 to the security headquarters device 8 installed in the security headquarters at regular intervals. The security headquarters device 8 is configured with a computer as a main part,
A signal is received from the signal transmission unit 7 of each of the base stations K1 to Kn, a user is specified from the information of the identification number, a calculation is performed using information of the radio wave intensity and the like as described later, and the position of the user is determined. Identify. The method for specifying the position of the user will be described in detail with reference to FIG. 7, but not only the position of the user but also the moving speed of the user can be specified.

At the security headquarters where the security headquarters device 8 is installed, a security guard waits or patrols the vicinity, and the security headquarters transmits the position of the user identified by the security headquarters 8 to the security guard. Tell by machine. The guard carries a search signal transmitter 10 for sending a search signal, an emergency signal receiver 13 for distance detection for searching for the position of the user, and a radio for communicating with the security headquarters.

As shown in FIG. 4, a search signal transmitter 10 outputs a search signal of a specific code.
1, a modulator 32 for modulating a high frequency oscillated by an oscillator 33 with a search signal, an oscillator 33 for oscillating a high frequency, a frequency switching circuit 34 for switching the oscillation frequency of the oscillator 33, and a high frequency amplifier 3 for amplifying a high frequency signal from the oscillator 33
5. Consisting of a high-frequency filter 36 for passing only a high-frequency signal of a specific frequency, and an antenna 37 for transmitting radio waves,
A weak radio wave (a radio wave reach distance of about 10 meters) carrying a search signal is transmitted.

The search signal receiver 12 carried by the user is:
As shown in the block diagram of FIG. 5, an antenna 81 for receiving a radio wave of a specific frequency including an emergency signal, a high-frequency filter 82 for passing only the received high-frequency signal, a high-frequency amplifier 83 for amplifying the high-frequency signal, A mixer 84 for mixing a specific high-frequency signal from the local oscillator 86 and converting it into an intermediate frequency signal, a detector 85 for detecting an output signal of the mixer 84, a frequency control circuit 87 for controlling the oscillation frequency of the local oscillator 86, A local oscillator 86 that oscillates
A data demodulation circuit 88 for demodulating a search signal from an output signal of the detector 85; a search signal storage unit 7 for storing a search signal
3. A search signal comparison unit 89 that compares the search signal demodulated by the data demodulation circuit 88 with the search signal stored in the search signal storage unit 73, and sounds the alarm sound generator 11 when the search signal is received. When a search signal transmitted by a search signal transmitter 10 carried by a guard is received, a signal is output from the search signal receiver 12 to the alarm sound generator 11. The alarm sound is output and the alarm sound generator 11 generates an alarm sound.

As shown in the block diagram of FIG. 6, the distance detection emergency signal receiver 13 carried by the guard includes an antenna 21 for receiving a radio wave of a specific frequency transmitted from the emergency signal transmitter 4, and an antenna 21. A shield portion 22 that surrounds and has an opening in only one direction and has directivity to the antenna, a high-frequency filter 23 that passes only a specific high-frequency signal, a changeover switch 24 that switches reception sensitivity, A sensitivity adjuster 25 for changing an amplification factor, a high-frequency amplifier 26 for amplifying a high-frequency signal,
A mixer 27 that mixes the amplified received signal with a specific high-frequency signal from a local oscillator 29 and converts the mixed signal into an intermediate frequency signal;
A detector 28 for detecting an output signal of the mixer 27, a frequency control circuit 91 for controlling an oscillation frequency of a local oscillator 29, a local oscillator 29 for oscillating a high frequency, a data demodulation circuit for demodulating an identification number from an output signal of the detector 28 92, an identification signal storage section 96 for storing a predetermined identification signal in advance, an identification number demodulated by the data demodulation circuit 92 and the identification signal storage section 96
Identification signal comparing section 9 for comparing with an identification number stored in
3. a level detector 94 for detecting the intensity of the radio wave, a radio wave level meter 95 for displaying the output of the level detector 94,
It comprises a display 97 for displaying the comparison result of the identification signal comparing section 93.

When receiving the emergency signal radio wave including the identification number transmitted from the emergency signal transmitter 4, the distance detection emergency signal receiver 13 measures the radio wave intensity and displays it on the radio wave level meter 20. . The receiver 13 is provided with a changeover switch 24 for switching the receiving sensitivity. Further, as shown in FIG. 8 showing the external appearance of the receiver 13, an antenna 21 for receiving a radio wave of a specific frequency transmitted from the emergency signal transmitter 4 is surrounded by a shield part 22 opened only in one direction, and has a directivity. To receive radio waves. for that reason,
The position of the emergency signal transmitter 4 that is the transmission source is determined by the change in the reception intensity of the radio wave when the direction of the distance detection emergency signal receiver 13 is changed, that is, by detecting the direction in which the radio wave intensity is maximum. You can know.

Next, a method for specifying the position of the user will be described with reference to FIG. For example, it is assumed that the base stations K1 to K5 are installed at positions where radio waves carrying identification numbers transmitted from the location where the user is present can be received. In free space, there is generally a relation of E = 7√ (Pt · Gt) / d, where E is the electric field strength, Pt is the transmission power, Gt is the transmission antenna gain, and d is the transmission / reception distance.
If the transmission power Pt and the transmission antenna gain Gt are kept constant, the electric field strength E of the radio wave is inversely proportional to the transmission / reception distance d. Therefore, if the electric field strength E of the radio waves at the base stations K1 to K5 is known, the occurrence of a user incident occurs. The distance to the place is known,
The location of the incident location can be specified.

That is, as shown in FIG. 7, circles are respectively drawn on a map with the base stations K1 to K5 as the center and the transmission / reception distance d obtained from the electric field strength E of the radio wave as the radius. Base stations K1 to
One point where all the circles centered on K5 intersect is the incident location where the user is present. Therefore, for example, let the location of the base station K1 be a position (X ₁ , Y ₁ , Z ₁ ) on three-dimensional coordinates,
The location of the base station K2 is represented by a location on three-dimensional coordinates (X ₂ , Y ₂ ,
Z ₂ ), the location of the base station K ₃ is a position on three-dimensional coordinates (X ₃ , Y ₃ , Z ₃ ), the incident location is a position on three-dimensional coordinates (Xo, Yo, Zo). If the distance between the station K1 and the incident location is d1, the distance between the base station K2 and the incident location is d2, and the distance between the base station K3 and the incident location is d3, d1 = √ ｛(X ₁ −Xo) ² + (Y ₁ -Yo) ² + (Z
₁₋ Zo) ² ｄd2 = √ ｛(X ₂ −Xo) ² + (Y ₂ −Yo) ² + (Z
^{_{2 -Zo) 2} d3 = √}} {(X 3 -Xo) 2 + (Y 3 -Yo) 2 + (Z
_{From the} three-dimensional simultaneous equation of ₃₋ Zo) ² ｝, the location (Xo, Yo, Zo) on the three-dimensional coordinates of the incident location can be calculated using an arithmetic device such as a computer.

When the user is moving, the electric field strength E of the radio wave changes with time. Therefore, the position of the user at each time point is specified from the electric field strength E of the radio wave measured at each time point. The moving speed can be obtained by calculating the moving distance between the points and dividing the moving distance by the time between each time point.

Next, the manner of use of the rescue communication device 1 configured as described above will be described. The user subscribes to the rescue communication system, is given an identification number for distinguishing from other users, transmits an emergency signal carrying the identification number, an emergency signal transmitter 4, and a search signal receiver 12 for receiving a search signal. Passed. The user has the emergency signal transmitter 4 and the search signal receiver 12
Always carry.

When seeking rescue, such as when being involved in a crime, the emergency switch 3 on the emergency signal transmitter 4
When is pressed, the identification signal output unit 43 reads the identification number stored in the identification signal storage unit 42 and outputs the identification signal to the modulator 44. The modulator 44 modulates the high-frequency signal oscillated by the oscillator 45 with the identification signal, and the modulated high-frequency signal is amplified by the high-frequency amplifier 46. The high frequency filter 47 removes the signal of the extra frequency and sends the high frequency signal to the antenna 48, and the antenna 48 transmits a radio wave with an identification number.

As shown in FIG. 7, when radio waves carrying identification numbers reach base stations K1 to Kn scattered in the vicinity, antennas 6 of emergency signal receivers 6 installed in the respective base stations K1 to Kn.
1 receives the radio wave, removes an extra frequency signal by a high frequency filter 62, sends a specific high frequency signal to a high frequency amplifier 63, and amplifies the high frequency signal. The mixer 64 mixes the received high frequency signal with the high frequency oscillated by the local oscillator 66 controlled by the frequency control circuit 67, converts the mixed signal into an intermediate frequency signal, and the detector 65 detects the signal.

The output signal of the detector 65 is transmitted to the data demodulation circuit 6
8 and a level demodulation circuit 68
And the identification signal comparing section 69 compares the identification signal stored in the identification signal storage section 70 with the demodulated identification signal. The level detector 71 detects the intensity of the output of the detector 65, and the A / D converter 72 converts the output of the level detector 71 into a digital signal. The identification signal output from the identification signal comparison unit 69 and the radio field intensity signal output from the A / D converter are sent to the signal transmission unit 7.
Thus, the information of the identification code and the radio wave intensity is sent to the security headquarters device 8.

The information gathered from each of the base stations K1 to Kn to the security headquarters device 8 is used by a computer of the security headquarters device 8 to identify a user from information of a pre-registered identification number, The position of the user and the moving speed of the user are calculated by using the above arithmetic expressions. Then, the security headquarters determines the position of the user identified by the security headquarters device 8,
A patrol or waiting guard is notified by radio and instructed to head to the user.

As soon as a command is sent from the security headquarters to the user by the wireless device, the security guard activates the search signal transmitter 10 to move to the position of the specified user of the security headquarters device 8. When the search signal transmitter 10 operates, the search signal output from the search signal output unit 31 is transmitted to the modulator 3.
2 and modulates the high-frequency signal oscillated by the oscillator 33. The modulated oscillating frequency signal of the oscillator 33 is amplified by the high-frequency amplifier 35, sent to the antenna 37 through the high-frequency filter 36, and put the search signal therefrom. The transmitted radio wave is transmitted.

At the same time, the guard activates the emergency signal receiver 13 for distance detection and heads in the direction of the user who seeks rescue. At this time, the emergency signal receiver 13 for distance detection
When the radio wave of the emergency signal including the identification number transmitted from the emergency signal transmitter 4 is received, the radio wave intensity is displayed on the radio wave level meter 20. In other words, the guard uses this receiver 13
Of the user having the antenna 21 surrounded by the shield part 22 opened only at the front while operating the changeover switch 24 of the Find the direction. When the direction of the distance detection emergency signal receiver 13 is changed, the direction in which the radio wave reception intensity is highest, that is, the direction in which the radio wave intensity is maximum, is the user's emergency signal transmitter 4 as a transmission source.
Direction.

On the other hand, search signal receiver 1 carried by the user
In 2, when the guard approaches the user, for example, about 10 meters, the radio wave of the search signal transmitted from the search signal transmitter 10 is received by the receiver 12 antenna 81, and the high frequency signal passed through the high frequency filter 82 is High frequency amplifier 8
Amplified at 3 and sent to mixer 84. In the mixer 84, the high frequency signal from the high frequency amplifier 83 and the local oscillator 8
6 is mixed with the high-frequency signal oscillated by the oscillator 6 and converted into an intermediate frequency signal. The signal is sent to a detector 85 for detection. Is taken out. The search signal is compared with a predetermined search signal stored in a search signal storage unit 73 by a search signal comparison unit 89, and if the search signal is confirmed, the alarm signal output circuit 74 turns the alarm sound generator 11 on. Sound.

As a result, the search signal receiver 12 carried by the user emits a loud alarm sound, and the security guard approaching the vicinity can hear the alarm sound to notify the user who is seeking help. Can be further approached, the user can be recognized, and rescue such as prevention of crime can be performed.

It is needless to say that the above-mentioned rescue can be used not only to prevent crime but also in the case of poor physical condition of the user. In other words, if the user suddenly becomes ill and wants someone to help, press the emergency switch 3 of the emergency signal transmitter 4 and contact the security headquarters, and the security staff will immediately rush there. Will be. Furthermore, if a demented elderly person with a wandering habit has an emergency signal transmitter 4 that constantly transmits radio waves,
Even if the old man goes out before his or her family knows, the family member can contact the Security Headquarters to confirm the location of the old man. In this case, the identification number of the user may be set for the wandering elderly so as to be distinguishable from the emergency identification number.

[0030]

As described above, according to the rescue communication device of the present invention, the emergency switch of the emergency signal transmitter is provided when the user is involved in a crime or the like and seeks rescue, as configured as described above. , An emergency signal is transmitted, received by an emergency signal receiver of a nearby base station, its identification information and information indicating radio field intensity are sent to the security headquarters device, and the security headquarters device has an identification number registered in advance. The user can be identified from the information of the user, the location of the user can be identified using the information of the radio wave intensity and the arithmetic expression, the security can be reported to the security guard, and the security guard can be directed to the user. . Therefore, unlike the conventional security buzzer, even if there is no helper around,
You can ask security guards for help and prevent crime.

[Brief description of the drawings]

FIG. 1 is a system configuration diagram of a rescue communication device of the present invention.

FIG. 2 is a block diagram of an emergency signal transmitter.

FIG. 3 is a block diagram of an emergency signal receiver.

FIG. 4 is a block diagram of a search signal transmitter.

FIG. 5 is a block diagram of a search signal receiver.

FIG. 6 is a block diagram of a distance detection emergency signal receiver.

FIG. 7 is an explanatory diagram showing a method of specifying a transmission position.

FIG. 8 is a perspective view of a distance detection emergency signal receiver.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Relief communication device 3 ... Emergency switch 4 ... Emergency signal transmitter K1-Kn ... Base station 6 ... Emergency signal receiver 7 ... Signal transmission part 8 ... Security headquarters device 10 ... Search signal transmitter 11 ... Alarm sound generator 12 ... Search signal receiver 13 ... Emergency signal receiver for distance detection

Claims (1)

[Claims] 1. A user who seeks rescue in a specific area, a plurality of base stations installed at an appropriate distance from the area, and a security which analyzes information gathered from the base stations and issues an instruction to a security guard. A rescue communication device using a wireless network linking a headquarters and the guard, an emergency signal transmitter carried by the user and transmitting an emergency signal including an identification number on a radio wave, the base An emergency signal receiver installed in a station, receiving an emergency signal transmitted from the emergency signal transmitter, and obtaining information on the identification number and radio field intensity, installed in the security headquarters, installed in each of the base stations A security headquarters device that identifies the current position of the user based on the information of the radio wave intensity collected from the emergency signal receiver, and a search signal transmission carried by the security guard and transmitting a weak search radio wave. Machine and said A search signal receiver having an alarm sound generator that generates an alarm sound when the user carries the search radio wave, and receives a radio wave carried by the security guard and transmitted from the emergency signal transmitter. And a distance detection emergency signal receiver for detecting the distance to the user based on the direction of the transmission point of the radio wave and the intensity of the radio wave.