JPS62206472A - Method for recognizing presence of individual body - Google Patents

Abstract

PURPOSE:To always enable the recognition on whether a specified individual body is present in a specified range, by performing a response transmission after a belay time varying with the individual body when the individual body in a specified range receives electromagnetic waves each with an assigned frequency. CONSTITUTION:Transmitting/receiving terminals (SR)211-2nl connected to a central unit (CTE)5 such as electronic computer or the like are arranged in office rooms 11-In through a branching filter (FDV) 3 for multiplexing signals. In response to a command from the CTE, the terminals SR211-2nl each transmits an electromagnetic wave with an assigned frequency repeatedly for a specified time and at a fixed cycle. When receiving electromagnetic waves each with an assigned frequency, badges possessed by individual persons in the respective rooms 11-In perform a response transmission of an electromagnetic wave with the same frequency after a delay time differently determined for each badge respectively. Then, the electromagnetic waves are received at the terminals SR211-2nl to recognize the presence of each person through the detection of the respective delay time.

Description

[Detailed Description of the Invention] Industrial Application Field] The present invention relates to a method for recognizing where a moving object such as an individual or a transport vehicle is located in an office, research institute, factory, etc. It is something.

[Conventional technology]

In the past, in order to prevent illegal entry into designated security areas, cards, badges, etc. were provided to those who were allowed to enter.
A method of confirming the person authorized to enter by requesting the presentation of these at the entrance or inserting a card into a card reader, and a method of assigning a specific number, password, etc. to each authorized person and inputting it using a keyboard etc. Generally, methods are used to confirm the person who is allowed to enter, such as registering the person's fingerprints, voiceprint, retinal blood vessel shape, etc. as a pattern, and using photoelectric detection to confirm the person who is allowed to enter.
These are used to recognize the identity of the person authorized to enter.

[Problem that the invention seeks to solve]

However, in recent years, with the aim of improving the operating efficiency of each moving individual in offices, research institutes, factories, etc. and easily obtaining information on the location of each moving individual, each individual has been It is possible to grasp the location of each individual from time to time, create a request to immediately transmit necessary information or commands to the target individual, or in the event of an emergency such as a fire outbreak, to grasp the location of each individual, Due to the need to convey appropriate instructions and comprehensively implement countermeasures,
When using each conventional method, it is only possible to control access to and exit from specific parts, creating the problem that each individual in a wide area cannot be recognized at all times.

[Means for solving problems]

In order to solve the above-mentioned problem, the present invention is constructed by the following means.

In other words, electromagnetic waves of a specific frequency are repeatedly transmitted to a monitoring area of a specific range for a predetermined period of time, and when a plurality of individuals receive the electromagnetic waves with their respective receivers, the electromagnetic waves are transmitted differently for each individual. After a predetermined delay time has elapsed, each individual transmits a response to all electromagnetic waves of the same frequency using its own transmitter, and by receiving this response transmission, each individual detects the delay time, and monitors according to the detection result. The existence of each individual within the area is recognized.

[Effect]

Therefore, by setting the response transmission delay time for each individual individual, it is possible to recognize whether or not a specific individual exists within the monitoring area. Individual recognition becomes possible.

〔Example〕

Hereinafter, the present invention will be explained in detail with reference to figures showing examples.

Figure 2 is a block diagram of the entire configuration.
Transmitting/receiving bucket terminal (hereinafter referred to as 5R) having the function of transmitting and receiving electromagnetic waves into 1~1n 2□1~2ji or 2nt~2
n4, which also has the function of a telephone, and has a branching device (hereinafter referred to as FDV) 3+t to 3+ for signal multiplexing.
It is accommodated in a certain private exchange machine (hereinafter referred to as PBX) 4 via 2 to 3nt to 3nJk, and FDV 3s
Solid devices such as electronic computers (hereinafter referred to as CT
CTE5 is also connected to CTE5, and operating devices such as keyboards, cathode ray tube displays, printers, etc. (hereinafter referred to as M
MI) 6 is included.

In addition, each of the 5R211 to 2nJ repeatedly transmits electromagnetic waves of a specific frequency for a predetermined period of time in response to a command from the CTE5, while each individual in each room 11 to 1n transmits an individual (hereinafter referred to as ID) 71~7m and possesses a badge that has the ability to transmit and receive electromagnetic waves.

As a result, when receiving electromagnetic waves from 5R2n to 2nj, each ID71 to 7m will respond with electromagnetic waves of the same frequency after a delay time that is determined differently for each ID71 to 7m. Transmit each SR211~2
The existence of each ID 71 to 7m is recognized according to the results received by nt and the delay times detected for each individual.

However, for each 5R211 to 2nJ, the effective range of transmission and reception is determined, and the entire monitoring area 8o to 8t1 to 8nx to
8nJ are arranged adjacent to each other, and each of 5R2tt to 2nJ adds its own address number to the recognition result and sends it to CTE5. Comprehensively recognizes whether it exists in the site and uses MMI6! Shows 1lea,
Or, it is something that is regularly pudding.

FIG. 1 shows the transmission status of each SR2 and each ID7. ~7
This is a timing chart showing the response transmission status of S.
When R2 is (,), depending on the specific frequency fo, for example, 5
- as a constant period TI and a predetermined time T.

The transmission is repeated for each period of ID7. ~7m, for a predetermined period of time from immediately before transmission (,).
During the period immediately before the end of o, the power supply (b) of the receiving unit is turned on in synchronization with the cycle TI, and when the transmission (,) is received, each ID7t to 7 is set based on the time when this ends.
The timer of m starts, and after the delay time t1 to tm, which is determined differently for each ID 7t to 7m, has elapsed, each ID transmits a response (e) to (e) using the same frequency fo. ing.

Therefore, in each SR2, each ID7. ~7m exists within its own monitoring area 8.

Figure 3 shows the appearance of SR2, (4) is a plan view, (B
) is a side view, and has the form of a functional telephone, and is equipped with a handset 11, dial keys 12, and a group of function keys 13 for various memory dials, etc., as well as a display 14 such as a liquid crystal display, It is equipped with a group of keys 15 for transmitting and receiving data to and from the CrB2, and a display 14 is used to display telephone displays and displays based on data transmission and reception.
6 is a provision.

In addition, the SR2 can be used as a function phone, and
It incorporates an electromagnetic wave transmitting section, a receiving section, a control section related thereto, etc., and transmits and receives data to and from the CrB2 using a specific audio frequency signal outside the communication band.

Figure 4 is a block diagram of SR2), control unit (hereinafter referred to as
CNT)21. Transmitting unit (hereinafter referred to as TX) 22t.

222, receiving unit (hereinafter referred to as RX) 231, 232. and.

It is roughly divided into telephone circuits (hereinafter referred to as "location") 24, and CNT21 (
l″jj microprocessor processor (hereinafter referred to as

CPU) 211 is all centered, fixed memory (hereinafter referred to as RO
M) 212, variable memory (hereinafter referred to as RAM) 213, and interfaces (hereinafter referred to as I/F) 214 to 211 are arranged around the periphery, and these are connected by a bus bar.
From 214, TX22! , 222 and the selector (hereinafter referred to as SOL) 25, and depending on the I/F 217, the RX23t-
232 and sends out control signals to them.
The F215 is connected to the PBX4 via a modulator/demodulator (hereinafter referred to as MDM) 26 and a high frequency p-wave filter (hereinafter referred to as HPF') 27.
A telephone line a28 is connected to the I/F'21&, and a key group (hereinafter referred to as KG) 13 and a display unit (hereinafter referred to as DP) 14 are connected to I/F'21&. A signal for use is also provided.

In addition, the holder 24 is a low-frequency P-wave device (hereinafter referred to as
The telephone line 28 is connected to the telephone line 28 via the LPF 29, and calls can be made and received by the telephone line 28, regardless of data transmission and reception by the MDM 26 via the HPF 27'.

TX22s-222 each has a frequency synthesizer (
FSY) 221t, 2212, modulators (MOD) 2221, 2222, and a power amplification stage (FA) 22:3+-22 having a predetermined bandwidth.
32, and FSY according to the control of CNT21.
As each generation frequency of 2211-2212 is determined, M
OD222+, intermittent modulation is performed at 2222,
5E after being amplified by PA233t -233t
In addition to being sent to L25 as a transmission output, one of the transmission outputs is selected by the response of 5EL 25 under the control of CNT 21, or both outputs are mixed, and then
It is transmitted as an electromagnetic wave from the antenna 16 via an antenna multiplexer (hereinafter referred to as Mpx) 30ffi.

On the other hand, the RX23t, 232 includes a band p-wave filter (hereinafter referred to as BPF) 2311, 2312 for noise removal, a high frequency amplification stage (hereinafter referred to as HFA) 232t, 2322, a mixer (
(hereinafter referred to as MIX) 2331.2332, F for local oscillation
SY2341.

2342, intermediate frequency amplification stage (hereinafter referred to as IFA) 2351
-2352, level selection circuit (hereinafter referred to as LSE) 23 that blocks noise components by passing only signals above a specified level
61.

2362, demodulator (hereinafter referred to as DEM) 23L-2372
, a waveform shaper (hereinafter referred to as
WF) 2381.2382, automatic gain control circuit (hereinafter referred to as AGC) 2391.2392, and FSY2341.23 corresponding to the control of CNT21.
The reception frequency is determined by the generation frequency of CNT2.
1, the BPFs 231 and 2312 receive the desired signal from the reception input from the MPX 30 via the gate circuit (hereinafter referred to as GT) 31, which is turned off during transmission and turned on at other times. Extract only the frequency component, amplify it with HFA2321-232z, convert it to an intermediate frequency with MIX233t-2332, further amplify with IFA235+ and 235□, and use LSE236+-2362 using a comparator etc. to detect the signal above the specified level. After extracting the components, DEM23
7t, Detection is performed at 2372, and WF238
1,2382 hours After checking the continuous time and performing all waveform shaping, it is given to the CNT 21 as a reception output.

Note that the CNT 21 sends out a reset signal in response to confirmation of the received output, and resets the integration circuits in the WFs 2381 and 2382.

In contrast to the above, the CPU 211 in the CNT 21 uses the ROM2
Execute the instructions in 12 and store the required data 'i RAM
Control operations are performed while accessing 213, and M
In response to the CrF2 command via DM 26 and I/F 215, TX 221 and 222 are placed in the transmitting state, and the transmission shown in FIG. 1 (-) is repeated, and the corresponding ID/
The response transmission eRX 23t from 71 to 7m is received by the eRX 232, and each delay time t1 to tm is detected by a timer configured in the CPU 211 according to each reception output via the I/F 217t, and the recognized result is sent to the RA.
Once stored in M213, I/F215 and MDM
26 to CrF2 as recognition data.

However, if there are many IDs 71 to 7m, the delay time will be 1. There is a limit to the number of ~tm that can be allocated, and for example, different frequencies of fx and fz must be used at the same time.For this purpose, TX221-
Two systems each of 222, RX23+, and 232 are provided.

In addition, the CPU 211 responds to the operation of the KG 13, sets each transmission and reception frequency, sets and updates each data for control and recognition, and records these conditions using the DPI.
4.

Figure 5 shows the shape of the transmitter/receiver possessed by ID7.
A) is a front view, and (B) is a cutaway side view of the main part, showing a disc-shaped case 31 and a ring 32 that is screwed onto the surface of the case 31. It consists of a transparent cover 33 and a card 34 that are held between the inner surface of the periphery and the case 31, and a back plate 35 that is screwed into the back of the case 31.
A clip 36 is fixed to the back side of the card 34, which makes it easy to attach it to a pocket, etc. The card 34 is made in the shape of a badge as a whole, and information such as affiliation and name can be freely written on the card 34. .

Also, inside the case 31, an integrated circuit 38 mounted on the printed circuit board 31 and a button-shaped glue battery 3 are provided.
9, etc., and an antenna 40 is buried in a ring-shaped groove provided on the outside of the periphery of the case 31.
At the top of 1, the head of a power switch PS using a lock chisel push button switch is exposed.

FIG. 6 is a block diagram of the transceiver shown in FIG.
RX41. TX42 and CNT43 are the main components, RX41 and TX42 are the same as RX22 and TX21 in Fig. 4, and RX41 is BPF411,
HFA412, MIX413, FSY414
, IFA415, LSE416, DEM4
17, WF418, AGC419, TX42 is FSY421, MOD422゜P
A423, and like the CNT21 in FIG. 4, the CNT43 also has CPU431', , R
OM432.

It is composed of RAM 433 and I/PLs 434 to 437, and accepts the reception output from RX 41 and controls RX 41 via I/F 436 ff.
The TX 42 is controlled via the i.

However, I/F434. , the delay time tl~tm
In order to set which one to use and to set the transmitting/receiving frequency, etc.
Hereinafter, 5ET) 438 is connected and I/F
In 437, from battery 39 RX41 and TX4
Each control input of a switch circuit (hereinafter referred to as 5W) 44.45 including a switching element that supplies power to each of the CNTs 2 and 2 is connected, and when the CNT 43 opens its operation in response to the power switch PS being turned on, the CNT 43 opens its operation. , SR2 transmission cycle T
5W44 is turned on for a long period of time, and as all transmissions and receptions of SR2 are received, on/off control of Figure 1) is performed.
While this is done for W44, control is performed to turn on 5W45 only for a period slightly longer than the period during which the response is transmitted by TX42.

Note that the CPU 431 executes instructions in the ROM 432,
Control operations are performed while accessing the required data'k RAM 433, as in the SR2, and the CPU 4
31, the configured timer causes a delay time t! ~tm regulations are in place.

Therefore, the transmission of SR2 is performed using antenna 40, MPX4
After the received output from the WF418 is given, a timer by the CPU 431 is started in response to the disappearance of the output, and according to the time amplifier, the timer shown in FIG. 1. A response is sent by TM01.

In addition, the CPU 431 controls S for a predetermined period of time.
If the transmission from R2 cannot be received, 5W44 is left off and RX41. The power supply to TM01 is cut off, and these controls prevent unnecessary consumption of the pond 39.

As mentioned above, ID7 is set for each monitoring area 811 to 8ni.
1 to 7m can be recognized by the constant cycle T1, and if this information is given to the PBX 4, it is possible to reliably transfer calls to a specific ID, and the same can be done for e-mail transfers. Since it becomes easy to set air conditioning conditions, control the blinking of lights, etc. by understanding the number of people in the room (~1n), it is possible to provide convenience to people who use the office, etc., and also to save energy.

Furthermore, in factories and the like, management of transport vehicles and the like becomes easier and more accurate, improving work efficiency.

In addition, in an emergency situation such as a fire outbreak, by understanding the location of each ID, evacuation guidance and disaster response can be ensured.

However, in Fig. 2, each S R2n to 2nL and C
It may also be connected to TE5 through a dedicated transmission line.

Each SR2++ to 2nJk may be fixed to the ceiling, wall surface, etc., or buried, and the shape shown in FIG. 3 may be selected accordingly.

In addition, in Figures 4 and 6, F8Y221t
.

Frequency modulation is performed under the control of 2212 and 421,
Amplitude modulation may be performed by controlling MOD222+, 2222.422, or both may be used in combination.The configuration of each RX231, 232, 41 may be selected accordingly, and depending on the conditions, each FSYO may be replaced with A single frequency crystal oscillator can also be used.

The configuration shown in Figure 4 is for TM221.22z and RX
231 and 232 may be made larger, or may be set as - for each year, and the CNT 43 in FIG. 6 may optionally use a combination of counters and various logic circuits without particularly using the CPU 431.

In addition, the shape shown in Figure 5 may be determined depending on the application.
For personal use, it can be used as a rectangular badge or card, and for vehicles, it can be used as a magnetic plate. In Figure 1, each 5R211
The delay time t is based on the transmission start point from ~2nJ.
l~tmf: Although equivalent results can be obtained even if the
The structure and shape of each figure can be modified in various ways, such as using a digital type as the PBX 4 in the figure and selecting the data signal format and multiplexing method accordingly.

〔Effect of the invention〕

As is clear from the above explanation, according to the present invention, the presence location of each moving ID can be recognized with a simple configuration that detects the delay time of response transmission, thereby improving the operating efficiency of offices, laboratories, factories, etc. , dealing with disasters, etc. becomes accurate and easy, and a remarkable effect can be obtained in recognizing various IDs.

[Brief explanation of drawings]

The figures show an embodiment of the present invention, Fig. 1 is a timing chart showing the status of transmission and response transmission, Fig. 2 is a block diagram of the entire configuration, Fig. 3 shows the appearance of the SR, and (4) is a plan view. (B) is a side view, Fig. 4 is a block diagram of SR, Fig. 5
The figure shows the transceiver for ID, (4) is a front view, (B)
6 is a cutaway side view of essential parts, and FIG. 6 is a block diagram of the transceiver shown in FIG. 5. 2++~2nJ...SR (transmitting/receiving terminal), 5...
...CTE (solid device), 6...MMI (control device), 71~7m...ID (individual), 8□, ~3nJ
...Monitoring area, 16.40...Antenna,
21, 43---CNT (control unit). 221.222.41...TX (transmission section), 231
゜232.42...RX (receiving section), 30.46.
...MPX (multiplexer), 31...GT (
gate circuit), 39... battery, 44.45...
SW (switch circuit), To...predetermined time, T
1... Constant cycle, t1-tm... Delay time.

Claims (1)

[Claims] Electromagnetic waves of a specific frequency are repeatedly transmitted to a monitoring area of a specific range for a predetermined period of time, and when each of the plurality of individuals receives the electromagnetic waves with their respective receivers, After the delay time elapses, each individual transmits an electromagnetic wave of the same frequency as a response to each individual using a transmitter provided in each individual, and upon reception of the response transmission, each individual detects the delay time, and according to the detection result, the monitoring is performed. An individual recognition method characterized by recognizing the presence of each individual in an area.