JPH11169353A - Personal security system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a system that permits searching for or tracking a target at low cost by allowing the identification of the position of the target in areas scattered in a wide area such as a street, eases the protection of a bicycle or motorbike from theft or searching for such machine after stolen or prevents an aged man or a child from loitering about and allows searching for them by making a portable terminal added to the target in particular handy and inexpensive to an extent that it may be thrown away after use. SOLUTION: A target for searching for is made to carry a portable terminal 11 that can repeat intermittently the transmission of a signal string containing a predetermined natural identification signal by burst radio transmission, the signals are received by local control stations 21 to 24 arranged in various locations, the position of the portable terminal is identified or found from the positions of local control stations 12 or in addition the strength of reception. The portable terminals 11 are made cheap to an extent they may be thrown away after use for ensuring widespread use, and the use of solar cells, a swing type or other energy sources is proposed to eliminate the need for daily maintenance.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to articles, animals,
Security system, and especially the unique identification code sequence.
A system for searching or tracing their locations by giving
Related to. 2. Description of the Related Art The location of an article, an animal, a person, etc. can be remotely confirmed.
As a method of recognition or identification confirmation, a unique bar code
To identify by reading with light beam irradiation, or
Or a small transponder that can transmit unique code sequences by radio
At least a method of reading and identifying was proposed and put into practical use.
Have been In addition, using the artificial satellite
Receiver location systems are also starting to be used
You. [0003] The bar code as described above
The utilization system is illuminated to read the barcode optically.
The barcode must be exposed to the projection optical system.
The use will be very limited. By using satellites
The method of identifying the position of the location has sufficient accuracy and function
However, the cost is high, miniaturization of the terminal is difficult, and
It does not lead to general dissemination, assuming disposables. [0004] In addition, an electromagnetic wave response type system is remote.
It has the potential for detection and identification, and is promising. However, currently I
At best, examples of practical use with C cards etc.
It is intended for detection in the vicinity of the gate.
Can be used for searching and tracking of scattered objects
It is not a system. The caller's
Although it is possible to specify the location, it is cheap enough for general use.
There is no costly system. (4/22) Therefore, the object of the present invention is to
The position of the target
Search or tracking at low cost
Is to provide a system that can Especially attached to target
Mobile terminals are simple and inexpensive, make disposable,
Prevents theft of vehicles and motorcycles, etc.
Or a system to prevent wandering of old people and infants, search, etc.
With the goal. [0006] A personal device according to the present invention.
The security system has a predefined target
Transmission of a signal sequence containing a unique identification code
With a mobile terminal that can intermittently repeat calls,
Receive these signals at local control stations located in various places
However, based on the position of the local control station or the reception strength, etc.
Is a system that attempts to identify or find the location of
You. [0007] The first personal security according to the present invention
The system consists of a portable device, a local control station, and a central control
The mobile device is activated by the carrier and is set in advance.
To the central control station, or to the central control station
Intermittently generates a signal sequence that also contains information that
It keeps emitting repeatedly, and the local control station
General commercial telephone line located in various places to receive signals
Alternatively, the central control station is connected to the central control station by a dedicated line, etc.
From the local control station that received the signal from the portable device to the portable device
Unique identification code, local control station location, or further reception
The location of the portable device is specified by obtaining information such as strength. In the first aspect of the present invention, the carrier carries a special key.
Press or press a special combination of keys in the key layout
It is activated by a predetermined method such as a helper in case of emergency
It is applied as a system that can call Or mobile
Detects patient conditions, such as increased blood pressure of the carrier, cardiac abnormalities, etc.
Attach sensors that can be activated by these sensors
It can also be applied as a system. (5/22) Personal Security According to Second Invention
The system consists of a portable device, a local control station, and a central control
Stations, etc., and portable units are started individually by radio broadcasting.
Activated and includes a predetermined portable device-specific identification code.
Signal sequence continues to be emitted intermittently.
Located in various places to receive signals from the portable device
Connect to central control station via general commercial telephone line or dedicated line
The central control station sends a signal for starting the portable device as needed.
Was transmitted by radio broadcasting, and transmission was started by activation
From the local control station that has received the signal from the portable device,
The unique identification code of the band, the location of the local control station, or
The location of the portable device is specified by obtaining information such as reception strength. A second aspect of the present invention is a search for a portable person or a portable device.
When searching for an object with the
Command including the identification signal of the portable device by broadcast radio waves, etc.
Send out, activate the target portable device and start position search.
Start. Activation by broadcast radio is currently popular
System itself and takes some of the functions of a pager.
Invest if considering the use of shared facilities and facilities
Cost can also be reduced. Or to a pager system terminal
It is also possible to incorporate the functions of the present invention. Old man, infant
Or it can be applied to search for pets, etc.
It is a system that can be applied to search for stolen items such as hacks. In the first and second aspects of the present invention, the local control
Local control of mobile phone system base stations without dedicated stations
Capital investment can be reduced by using as a station
You. In other words, the code sequence transmitted from the portable
The format acceptable to the local control station of the system
Access to the central control station during the transmitted code sequence
Through the mobile phone system, including the pass, ie the phone number
The code sequence unique to the portable device is sent to the central control station.
The simplest system is the mobile phone
Equipment costs can be reduced by incorporating functions. (6/22) Furthermore, the local control station and the central control station
Use mobile phone line or general phone line for connection between
Can reduce the cost of installing the system.
In this case, the access path to the central control station is also a telephone number. [0013] A personal security according to the third aspect of the present invention.
The system consists of a portable device, a local control station, and a central control
The mobile device is composed of a station and the like.
Repeatedly and intermittently emit a signal sequence containing a valid identification code
Local control stations are located in various places and
Connected to the central control station by line or dedicated line, etc.
The unique identification code specified by your station was received from the portable device
The matching search is performed from the unique identification code sequence.
Identification code, local control station location, or even reception sensitivity
Information to the central control station to identify the location of the portable device.
You. In the third aspect of the present invention, the portable device always transmits a predetermined
A system that continues to transmit the signal sequence of
Location management tracking system in limited places such as amusement parks and ranches
Suitable for applications such as [0015] These first, second and third inventions are the present invention.
Is the basic system. In each case, a portable device is added to the target,
Information such as unique identification code is repeated by radio waves in a burst
And transmit the received information from the local control stations located in various places.
A system for estimating the position of the portable device based on clues and searching or managing it
Stem. An important point here is the cost of the system.
In particular, the cost of portable devices has been reduced, making them easier to use.
It is to do. In the present invention, the system can be inexpensive.
When the operating frequency of radio waves is extremely limited, for example,
It is assumed that it can be established with any type. As a result,
The configuration of both the band and the local control station can be simplified,
On the other hand, radio waves transmitted from multiple
(7/22) There is a concern that it will not function as a system. In the present invention, a sufficient
Gives a workaround. That is, the portable device repeats burst transmission.
Returns, but repeats the burst transmission duration by the time interval
Setting to a significantly lower level may cause interference between multiple portable units.
Probability is small. One setting for these time ratios
Mobile devices that could compete with local control stations
It will depend on what you assume. [0018] Contents transmitted in bursts from the portable device
It is natural that interference detection code is included or interference or weakness
System misrecognizes due to received data error due to level
Although there is no practical possibility to do so,
Data error due to continuous interference of signals
Repeating burst transmission for each portable device so as to avoid things
Change the time interval setting, or use the same
Further measures such as randomizing the
I am planning. Another important point is the power consumption of the portable device.
By realizing the practical reach of electromagnetic waves while suppressing
is there. The present invention addresses this point with bursty transmission.
By increasing the ratio between the duration and the repetition time interval,
Power consumption as an average even if the instantaneous power of the transmission is large
Has been proposed that can be kept small. This is also
As mentioned earlier, even a proposal to reduce the probability of interference
Yes. As a result, the power consumption of the portable device is
To a level that can be covered by a portable generator, etc.
A system that does not require a license is realized. The personal security system according to the present invention
Basically has a mobile device as a search or management target,
Localizers that place electromagnetic waves emitted from portable devices in various places
Received at the control station, and from the position where the signal was received or the receiving sensitivity, etc.
Identify the location of the mobile device. (8/22) Inexpensive or wide-ranging portable devices can be disposable
Portable equipment that is a challenge to realize a small size to secure the use range
Low power consumption, securing reachable distance at a practical level,
Transmission power should not be secured against data errors due to communications, etc.
The transmission signal sequence is also made short and burst-like, and
The average reception power is reduced by increasing the distance to reduce the average power consumption.
However, even in the same frequency band, there is little chance of interference.
Further, by means such as randomizing the transmission interval,
We propose measures to reduce the probability of data errors,
The system is easy to implement. The present invention will be described below with reference to the drawings.
The operation, principle, effects, etc. of the lever will be described in detail. FIG. 1 illustrates the basic system of the present invention.
This is a diagram for clarification, and the common items of the present invention will be described with reference to the diagram.
Explain the pattern. The basic system shown in FIG.
And the local control stations 12 (numbers in FIG. 1)
No. 12 collectively refers to the local control station)
And the station 13. The portable device 11 has a unique identification code.
Code sequence and a code sequence including the unique identification code
Electromagnetic waves in short bursts according to the specified format
A search or tracking pair that keeps transmitting repeatedly
It is held or added to the elephant. Local system located in various places
Your station 12 receives the electromagnetic waves transmitted from the portable device 11
To the central control station 13 and the central control station 13
One or more rows that have received a signal from the
From the position of the local control station 12 or from the reception sensitivity and the like.
1 is specified. Local control station 12 and central control station
13 may be connected by a dedicated line, but in FIG.
Shows an example of using a mobile phone system line.
No. 14 is the base located in various places in the mobile phone system.
Reference numeral 15 indicates a general station, and reference numeral 15 indicates a general line. As shown in the model in FIG.
The local (9/22) control stations 12 are distributed and arranged at the nodes of each cell 20.
, But can receive signals from the portable device 11
Local control station 12 so that it is limited to one or several stations.
Since the size of the rule 20 is set, the central control station 13
Based on the position information of the local control station 12, the portable device 1
You can know the approximate location where 1 exists. In the figure
Therefore, the signal transmitted from the portable device 11 is
Number 2 spreads concentrically around the portable device 11
Received by local control stations indicated by 1, 22, 23, 24, etc.
Indicates that you will be trusted. The portable device 11 transmits the received local
Presumed to exist between control stations 21, 22, 23, 24
Is done. Of course, if the sensitivity is sufficient, the local system farther away
The station 12 can also receive the signal.
It is difficult to estimate the position of (1). When the portable device 11 moves as indicated by the arrow 26,
If a new signal is received from the portable device 11,
It is possible to know the locus of movement from the position of the
It is possible to specify the position of the portable device 11 more accurately.
become. In addition, each local control station 12 (collectively) is a portable device 1
If the reception sensitivity of the signal from 1 can be detected,
Each of the local control stations 21 and 21 receiving these signals
Since the estimated position from 2, 23, 24 is known,
Of the estimated position from the control stations 21, 22, 23, 24
As a result, the position of the portable device 11 can be easily specified. The important point in this system is that
Costs, initial system costs, maintenance costs, etc.
To reduce as much as possible.
Reduce the power consumption of the portable device to the distance from the portable device that can receive
To the practical level, and at the practical level
Avoid interference, avoid malfunction due to interference, etc.
And these measures have also been proposed as part of the present invention.
I have. Extending the reach of electromagnetic waves from portable devices
In order to increase the distance (10/22) from the local control station, the transmission power must be increased or the transmission / reception antenna must be increased.
It is possible to improve the efficiency of the receiver and increase the sensitivity of the receiver. Book system
System's local control station pursues the full potential
Limits on portable devices, that is, the amount of power available and size
Considering the limitation of the transmission, etc., while using the necessary and sufficient transmission power
The solution is to reduce the average power consumption. That is, for a short time
The burst transmission of
Average power with sufficiently long repetition interval
To the minimum necessary. For example, specifically, the transmission power in a burst form is
10mm as in the case of PHS which is one form of mobile phone
Output of about watts (mW) and transmission time of 10 mm
Average power consumption if the transmission time interval is 10 seconds on average
Is as small as 10 microwatts. This is for environmental conditions
However, it is possible to achieve a reception range of several hundred meters.
You. This means that the burst transmission time is 100 times of the transmission time interval.
It is proposed in the present invention as a fraction or less. Depending on the application
However, the signal transmission from the portable device does not need to be frequent,
Since there are many cases where 10 or 100 seconds are sufficient,
On average, it is easy to realize small power consumption. The usual way to avoid interference is to separate the frequencies
To increase the burden on the local control station
Therefore, a system that can be used even if the frequency types are limited
Required for very short burst transmissions from mobile devices
Information is transmitted and the time interval for the repeated transmission is
If the transmission time is sufficiently longer than the burst transmission time,
The rate is small. Specifically, the time of burst transmission
The transmission interval is set to 1: 100 or more, for example, the transmission time is set to 1
If the transmission time interval is set to 1/00 second and the transmission time interval is set to 10 seconds,
Even if one frequency is used, interference between portable devices becomes practical
Can be smaller. This is also proposed as part of the present invention
ing. Also, the time between transmissions in the form of a burst
Set the interval to a different (11/22) value for each portable device as much as possible, or set the transmission time interval to random
The probability of occurrence of continuous interference can be reduced by changing to
For practical purposes, we have proposed a sufficient system implementation. Transmission time
Proposal to change the interval for each portable device, and even for the same portable device
Proposal for randomly changing the transmission time interval is also a part of the present invention
It is. The same frequency can be used or
Interference occurs even when the same type of spread spectrum system is used.
The probability of interference and the probability of continuous interference
I can do it. On the other hand, in the transmitted code sequence,
If at least an error-detecting code with sufficient capability is included
If interference occurs, an error is detected by the error detection code.
To avoid misinterpretation due to interference and wait for the next transmission signal
Information is received. FIG. 2 shows a burst transmission from a portable device.
1 shows an example of a signal format. In the figure
The signal format 30 includes a synchronization signal section 31 on the time axis t,
Unique identification code 32, central control station telephone number 33, error detection
Reference numeral 34, an end mark section 35, and the like. main
The important points are the unique identification code 32 and the access pattern to the central control station.
The central control station telephone number 33 is
Therefore, additional signals, such as various states of the portable device,
May be included. Also, as explained later with examples,
If you use a part of the telephone system, mobile phone
The base station of the system is equivalent to the local control station in the present invention
And the format must be compatible with the base station.
You. Furthermore, the error detection code 34 should always be added and is good.
Malfunctions in this system where a reliable transmission / reception environment cannot always be expected
It makes me avoid the work. Other synchronization signal part 31, d
The mark section 35 is not necessary information for this system.
Is hardware for transmitting and receiving signals between portable devices and local control stations
Required in the field and belongs to the art.
No particular description is given in the text. In addition, the error detection code 34
Since the contents and functions are well known, they will not be particularly described. (12/22) In burst transmission, transmission is suddenly performed.
Starting up and shutting down power can cause unnecessary harm.
Slow rise and fall of transmission power
It is desirable to control to have a gentle slope
Not even. In the figure, the envelope 36 of these signal amplitudes is used.
An example is shown schematically. FIG. 3 shows a case where a plurality of portable units transmit at the same time.
How interference occurs at the time, and the probability of interference
It is a figure for explaining a measure which makes a rate small. In the figure,
Berths emitted from a plurality of portable devices 41, 42, 43, 44
The G-like signal indicates a race condition on the time axis t. System
Use as few frequency types as possible to reduce cost
Transmission time that is significantly shorter than the transmission intervals Tp1 and Tp4
Burst transmission 45, 46, 47, 48 at Ts
But still a bursty transmission indicated by numbers 45 and 46
Bursts from different portable devices 41 and 44 like radio waves
May overlap with each other and reach the local control station.
You. These signals are generated by the error detection code contained in the signals.
Although it is processed without being mistaken, in the present invention, the burst
Time interval Tp with burst transmission 47 after state transmission 45
1, the burst transmission 48 is followed by the burst transmission 48.
As shown in the figure, the time interval Tp4 differs for each portable device.
And the possibility of continuous interference is small.
Signal to the local control station.
Has a high probability of being received. Furthermore, Bath
The transmission time Ts is calculated from the transmission intervals Tp1 and Tp4.
Setting it to a small value is also an effective way to reduce the probability of interference.
Some things are self-evident, but their values are set in the same local
The number of portable devices that can reach the control station
It is set depending on whether or not. The present invention is based on the system described above.
Portable device configuration, portable device activation method, local control station configuration
System that can be applied to various applications by changing and modifying
(13/22) In the specific examples described below,
Based on this system, only the different parts are taken
I will explain. FIG. 4 shows a first embodiment of the present invention.
You. Sometimes an individual who needs care due to physical problems
Contractor and in the event of an emergency, at the request of the contractor
Care center searches for the contractor and provides necessary care
1 shows a system. In the figure, the portable device 51 is owned by the contractor.
When the contractor activates the portable device in the prescribed manner, the portable device
Reference numeral 51 denotes a base station of the mobile phone system arranged in various places.
Local control station 52 (in FIG. 4, the number 52 is
Data format that can access the local control station)
Unique identification signal on mat and telephone number of care center 54
Is transmitted intermittently repeatedly. Above
Receiving the signal, the local control station 52 transmits the signal included in the signal.
The telephone number is accessed through the telephone line 53 and the portable device 51 is accessed.
Unique identification code and local control station identification number, plus
If so, the receiver transmits the reception sensitivity and the like. The care center 54
Local that has received a signal having the same unique identification code
Control stations 55, 56, 57, 58, etc.
The position of the portable device 51 is determined from the
Search for contractors and provide necessary care. In addition,
If the contractor is moving, the signal of the portable device 51 is transmitted over time.
Monitors the position of the received local control station 52 (collectively)
As a result, the location of the carrier can be accurately determined, and the search can be performed easily.
Becomes easier. The portable device 51 can be an independent card or other
It can be easily portable, but other systems, such as existing
It can also be incorporated as a function of the mobile phone system.
Therefore, the overall system cost is expected to be kept low.
It is. In that case, the startup method is installed in the system.
Can be defined by the combination conditions of various keys that are present. In addition,
The activation method of the portable device 51 depends on the physical condition of the carrier.
It can also be a system that performs. For example, functions such as heart
The abnormality sensor may be used to activate the portable device 51. (14/22) FIG. 5 shows a portable device 60 according to the first embodiment.
Is shown in a functional block diagram. In FIG.
Numeral 60 designates an antenna part 61 for signal transmission and a radio wave transmitting antenna.
, A signal generator 63, a transmission start switch 66
, A timer 64, a battery 65, and the like. Faith
The signal generator 63 has a built-in semiconductor memory
With 60 unique identification codes and access passes to care centers
A certain telephone number and additional bits for error detection are stored.
Have been. When activated by the transmission activation switch 66,
The timer 64 is started, and the instruction of the timer 64 is given.
Thus, the signal generator 63 sequentially reads the stored code sequence.
To the next radio wave transmitting amplifier 62, and
Emit electromagnetic waves modulated by signals. Emission of electromagnetic waves
The emission is short and burst, and the next
Immer 64 controls the intervals to be random
Is done. The start of the above function of the portable device 60 is the transmission start mode.
The transmission is performed by the switch 66, but the transmission is stopped by the portable device 60.
The switch in the small hole provided in the case (not shown)
It is stopped by pushing the switch with a thin pin. These machines
There are various types of outages according to the purpose. For example, after startup
Collection or battery 65 is exhausted to make it difficult to stop
Or as a function of a mobile phone
If this system is included, use a combination of numbers
Or a release switch. FIG. 6 shows a second embodiment for preventing bicycle theft.
Alternatively, in a case where the portable device 70
Fig. The system is shown in Figure 6 attached to a bicycle.
Mobile device 70 and local control stations located in various places,
And a central control station. Portable device 70 is small
Made, hard to find and damaged by wind and rain
A bicycle that can easily secure the light necessary for solar cells
It shall be housed in a light box. The benefits of this system
The user contracts with the local government or security company, etc.
Of the portable device 70 having the
Register the unique identification code. Those contractors in case of loss such as theft
To the local government or the police (15/22) as a central control station.
Is issued in a predetermined signal format, and the portable device 70 is activated.
You. Once the portable device 70 is started, it is collected and
Constant until stopped by an electromagnetic stop command
Signals in the signal format are intermittently transmitted in bursts
to continue. The signal format is self-governing as a central control station.
Including the phone number of the body or security company,
The local control station that received these signals is included in the signal
Access the telephone number to access the unique identification code and local station
The central control station transmits the position or further the reception sensitivity, etc.
The size of the bicycle to which the portable device 70 is added based on the information
Inform the contractor of the general location or collect. In the same figure, the energy source of the portable device 70
As a solar cell 77 and a condenser 78 as a secondary battery
An example of a configuration using a power source is shown. The portable device 70 is
Tenor 71, received signal decoder 75, radio wave transmitting amplifier 7
2, signal generator 73, timer 74, solar cell 77,
And a capacitor 78 and the like. Power generation by solar cell 77
Power is always supplied to the capacitor 78 via the diode 79.
It is stored. The command radio signal from the central control station
Received by the antenna 71 and received by the received signal decoder 75
After confirming that this is a start signal for this portable unit,
to start. Timer 74 is stored in capacitor 78
Monitor the electric power, and when it reaches a certain level,
3. Activate the radio wave transmission amplifier unit 72, and the signal generator 73
Unique identification code of portable device read from memory and center
Telephone number serving as access path to control station, and error detection
Radio signal transmission of synchronization section and other signals in addition to additional bits for
Output to the output amplifier section 72 and modulated via the transmission / reception antenna 71
The transmitted electromagnetic wave is transmitted in a burst. Condenser 7
The capacity of 8 stores the power necessary for one burst transmission.
It is enough if the capacity is slightly larger than
Randomize the sending time interval. In this case, timer 7
4 supervises that the time interval does not become too small.
To watch. (16/22) The power supply section 76 converts the power generated by the solar cell 77 into a diode.
It is stored in the condenser 78 via 79. Solar cell 77
The power generated by the sensor varies with the amount of light
Combined with the variation of the condenser 78 for each portable device
The charging time for capacitor 78 will be randomized.
You. In applications such as this system, the function
No, so regular batteries are used as a power source for daily maintenance
Troubles of forgetting management and not working when needed
However, in the embodiment of the present invention, it is necessary to
Make mistakes when needed by using no energy source
Function can be expected. Of course, continuous
Insufficient energy is available, which hinders night use. I
However, this type of search system is a matter of time
Function often only during the daytime
Even so, the purpose can be sufficiently achieved. Also, of course
Can also be applied to vehicles, automobiles, etc.
If you use this as a power source because it has a terry,
A signal can be emitted during this time. FIG. 7 shows a local system employed in the second embodiment.
A configuration example of the control station 80 is shown in a block diagram. In the figure
Therefore, the local control station 80 communicates with the receiving antenna 81 and the signal solution.
Connection between reader 82, control unit 83, and mobile phone system
It comprises a circuit 86 and a power supply unit 87. Signal decoder
Reference numeral 82 denotes a mobile phone among the signals received through the receiving antenna 81.
The control unit 83 analyzes the code sequence of the portable device and obtains the obtained portable device.
Unique identification code, the access path to the central control station
Connect the mobile phone system to the central control station based on information such as the talk number.
The connection circuit 86 is activated, connected, and transmitted. Mobile phone system
The connection circuit 86 of the system includes a transmitting / receiving antenna 85 and a mobile phone.
It is composed of a system control circuit 84, but as a function
Is the mobile phone itself. The power supply unit 87 is a solar cell 88
And a secondary battery 89 and a diode 90,
Represents the power generated by the solar cell 88 via the diode 90.
It is stored in the secondary battery 89, and the local control station 80
It gets power from 89. Row adopted in the second embodiment
Cal control station 80 thus uses solar cells as the power source.
Use the existing mobile phone system with the central control station.
It is a special process for connecting any
It does not require anything and is cheaper (17/22). The third embodiment will be described with reference to FIGS.
You. As in the second embodiment, the purpose is to prevent bicycle theft or
Is an example applied to a search system. Added to the bicycle
Mobile devices, local control stations located in various places, and central
It consists of a control station. Handset made small and found
Bicycles that are hard to
It shall be housed in a light box. Contract of this system
The contractor must sign a contract with the local government or security company, etc.
Or a unique identification code of the portable device
Register the issue. The local control station has a central
It is assumed that it is connected to the control station. In the third embodiment, the portable device is unique
Identification code or unique identification code and access to the central control station
Signals including telephone numbers that are used as access paths are always burst-like
Continue sending intermittently. On the other hand, the contractor is stolen or lost
After confirming that the situation was correct, the report was sent to the designated department and the local government as the central control station
Alternatively, the security company receives the notification and then goes to each local control station
The local control station issues a search command for the unique identification code.
After receiving the command, the signal continues to be transmitted from the portable device.
Continues to search for the unique identification signal specified by
Can identify the location of the local control station to the central control station
Report with local control station identification number. Central control station
Is based on that information,
Inform the contractor of the approximate location or collect. Real truth
In this example, a signal is continuously emitted from the portable device.
The number of portable devices that the local control station can process is limited,
This has the advantage that the cost of the banding machine can be kept low. FIG. 8 shows a portable device 10 used in the third embodiment.
0 is a functional block diagram. The portable device 100 has an
Antenna 101, radio wave transmitting amplifier 102, signal generator 1
03, timer 104, and power supply 105
Is done. The power supply unit 105 includes a solar power (18/22) battery 106, a capacitor 107, and a diode 108.
The power generated by the solar cell 106 is always
It is stored in the circuit 107 via a diode 108. Ta
Immer 104 uses the power stored in capacitor 107
Monitor, and when it reaches a certain level, signal generator 103, radio wave
The transmission amplifier unit 102 is started, and the signal generator 103
Unique identification code of the portable device 100 read from the
Telephone number serving as access path to central control station, and error detection
A code sequence such as an output additional bit is transmitted to a radio wave transmitting amplifier unit 102.
To transmit the modulated electromagnetic wave in a burst. Ko
The capacity of the capacitor 107 is necessary for one burst transmission.
It is enough if it is slightly larger than the capacity that can store the necessary power.
Random transmission time interval using variation in charging time
Become In this case, the timer 104
Monitor to make sure it is not too small. Features of this embodiment
It means that the portable device 100 has enough power for the condenser 107
The second implementation is to continue sending signals intermittently if there is any
There is an advantage that the cost is lower than the example. FIG. 9 shows a local system in the third embodiment.
A configuration example of the control station 110 is shown in a functional block diagram. In the figure
And the local control station 110 is connected to the mobile phone system.
Circuit 111, instruction decoder 114, memory 116, control
Section 115, identification code collator 120, receiving antenna 11
7. Decryptor 118, memory 119 and power supply unit 121
It is composed of The connection circuit 111 of the mobile phone system transmits and receives
Trust antenna 112 and mobile phone system control circuit 113
The search instruction is sent from the central control station to the mobile phone.
Through the mobile phone system connection circuit 111 through the system
Is decoded by the command decoder 114 and the designated unique
Stores identification code in memory 116 and controls command at the same time
Send to section 115. On the other hand, a bar transmitted from the portable device 100
The strike transmission signal is transmitted through the receiving antenna 117 and the decoder 118.
And transmits the decoded unique identification code to the memory 119.
The memory 119 and the memo
(19/22) The identification code matching unit 120 checks whether or not the contents obtained are the same.
Search by collation. If the data stored in the memory 119 is
Restored for searching in the identification code and memory 116
If the unique identification code matches, the mobile phone connection
Unique identification code via system 111, local control station
110 to the central control station,
This is used as a clue for position estimation of 0. The power supply unit 121 is a solar power
It consists of a pond and a secondary battery.
The power is stored in the secondary battery via the diode,
The control station 110 usually obtains power from a secondary battery. The third embodiment is to prevent bicycle theft or
The application to the search system was taken as an example, but the
When the signal containing the unique identification code etc. is
Because it is a limited place such as an amusement park,
Handing over the mobile device in the form of a letter and paying for various contactless places without contact
If applied to a system or management system,
The effect can be expected. However, the power supply of the portable device in this case is
Reliable hands, such as batteries, depending on the importance of the target function
Requires a step. In the example shown in FIGS. 6 and 8, the energy source
As for the solar cell shown by the number 77 and the number 106
The generated power is stored in capacitors 78 and 107 for use.
Was. However, operation is expected even at night without light.
Or kept under light-free conditions such as talismans
Energy sources other than solar cells where possible
Must be adopted. If a portable device is added or
If the object you carry always moves or vibrates,
An oscillating generator that generates power by vibration and acceleration
Or use batteries. Those choices are human
In addition, it depends on the circumstances of the application field and the cost bearing capacity. (20/22) In each embodiment, the description was not made individually.
However, the transmitting and receiving antennas of each portable device are short metal pieces or loops.
It is composed of a loop coil, a dielectric and the like. For these small devices
Transmitting and receiving antennas are already available for various mobile phones,
Systems, IC cards, etc.
is there. In addition, electronic circuits such as control circuits are already wireless IC cards.
Small and low power consumption semiconductors such as card and pager systems
An integrated circuit has been developed and realized, which is a known technique. did
Therefore, a small and inexpensive portable device required for the present invention is realized.
Necessary elemental technologies exist, and the present invention can be easily implemented.
Can be commercialized. The present invention has been described with reference to the drawings.
As described above, the personal security system according to the present invention is
The system basically has a portable device as a search or management target.
And the electromagnetic waves emitted from the portable device are
Received by the local control station, the position where the signal was received or the receiving sensitivity, etc.
Inexpensive system that identifies the position of the portable device from
Search for lost or stolen bicycles and motorcycles in the city
It can be applied to searching for ropes, wandering old people, infants, etc. Less than
The application examples listed above are only examples as examples.
Therefore, various modifications and applications are possible.
It does not limit the scope of the light.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram for explaining a basic system of the present invention. FIG. 2 is an example of a format of a burst transmission transmitted from a portable device. FIG. FIG. 4 is a diagram for explaining an interference avoidance measure according to the present invention. FIG. 4 is a diagram for explaining a system according to a first embodiment. FIG. 5 is a functional block diagram of a portable device in the first embodiment (21/22). FIG. 6 is a functional block diagram of a portable device in the second embodiment. FIG. 7 is a functional block diagram of a local control station in the second embodiment. FIG. 8 is a diagram of the third embodiment. Functional block diagram of portable device [FIG. 9] Functional block diagram of local control station in third embodiment [Description of symbols] 11: portable device, 12: local control station, 13: center Control station, 14.
..Base stations of mobile telephone systems, 15 ... general lines,
20 ... cell, 21, 22, 2
3, 24 ... a local control station that has received the signal of the portable device 11, 25 ... a dotted line, 26 ...
Arrow 30: Transmission signal format, 31: Synchronization signal part, 32: Unique identification code, 33:
Central control station telephone number, 34 ... error detection code,
35 ... end mark part, 36 ... envelope 41, 42, 43, 44 ... portable device, 4
5, 46, 47, 48: Signals from portable devices 41 and 44 51: Portable device, 52: Local control station, 53: Telephone line,
54 ... care center, 55, 56, 57, 58
..The local control station 60 receiving the signal of the portable device 51..the portable device, 61..the antenna portion, 62..the radio wave transmitting amplifier portion, 63 ..
・ Signal generator, 64 ・ ・ ・ Timer, 6
5 ... battery, 66 ... transmission start switch 70 ... portable device, 71 ... transmission / reception antenna, 72 ... radio wave transmission amplifier part, 73
..Signal generators, 74 ... timers,
75: Received signal decoder, (22/22) 76: Power supply unit, 77: Solar cell, 78: Capacitor, 79: Diode 80: Local control station, 81 ... · Receiving antenna, 82 ··· Signal decoder, 83 · · ·
Control unit, 84 ··· mobile phone system control circuit, 85
... Transceiver antenna, 86 Connection circuit with mobile phone system, 87 Power supply unit
88 ... solar cell, 89 ... secondary battery,
Reference numeral 90: diode 100: portable device, 101: transmitting antenna, 102: radio wave transmitting amplifier unit, 10
3 ... signal generator, 104 ... timer,
105: power supply unit, 106: solar cell,
107: condenser, 108: diode 110: local control station, 111: connection circuit of mobile phone system, 112: transmitting / receiving antenna, 113: mobile phone system control circuit, 11
4 command decoder 115 control unit
116: memory, 117: receiving antenna, 118: signal decoder, 119
... memory, 120 ... identification code collator,
121 ・ ・ ・ Power supply unit

Claims (1)

Claims: 1. A portable device comprising a portable device, a local control station, a central control station, and the like. Further, a signal sequence including information serving as an access path to the central control station continues to be emitted intermittently repeatedly in a burst-like electromagnetic wave so that the transmission time becomes repetitively smaller than the time interval. In order to receive the signal, it is arranged in various places and connected to a central control station via a general commercial telephone line or a dedicated line, etc. The central control station receives a signal from the portable device and sends a unique identification code of the portable device to the local control station. A personal security system characterized in that the location of a portable device is specified by obtaining information such as the position of a local control station, or furthermore, reception strength and the like. A central control station and the like, wherein the portable unit is individually activated by radio broadcast and is a signal sequence including an identification code unique to the portable unit or information that further serves as an access path to the central control station. And the local control station is arranged in various places to receive signals from the portable device, and is transmitted to a general commercial telephone line. Alternatively, the central control station is connected to the central control station by a dedicated line or the like. 3. A personal security system characterized in that the location of a portable device is obtained by obtaining a portable device, a portable device, a local control station, a central control station, and the like. An intermittent repetition of a signal sequence including an identification code unique to a predetermined portable device or further including an information serving as an access path to the central control station in a burst-like electromagnetic wave so that the transmission time is repetitively smaller than the time interval. The local control station (2/22) is arranged in various places to receive the signal from the portable device, is connected to the central control station via a general commercial telephone line or a dedicated line, and is instructed by the central control station. The identified identification code sequence is collated and searched from the unique identification code sequence received from the portable device, and when the identification code sequence matches, the unique identification code, the position of the local control station, or further information such as the receiving sensitivity is sent to the central control station, and the portable device sends the information. A personal security system characterized by identifying the location of a personal security system. In the personal security system according to any one of claims 1 to 3, A personal security system characterized in that the transmission time interval of a predetermined signal sequence that is repeatedly transmitted in a burst form is made different for each portable device. A personal security system in which a transmission time interval of a predetermined signal sequence that a portable device intermittently transmits in a burst form is randomized in a security system. 4. The personal security system according to claim 1, wherein the portable unit has a solar cell or a rocking generator as an energy source, and transmits the signal sequence each time the amount of generated power is accumulated at a certain level or more. A personal security system characterized in that the transmission time interval is randomized as a matter of fact. 6. The personal security system according to claim 1, wherein the duration of the signal sequence transmitted by the portable device in a burst is less than 1/100 of the time interval at which the signal sequence is transmitted repeatedly. Personal Security System (3/22)