JPS62228959A - Recognizing transmitting and receiving method for individual body - Google Patents

Abstract

PURPOSE:To prevent a battery from being consumed unnecessary and to make a secure response communication by synchronizing the power-on period of a receiver with transmission on reception from a transmitter and turning on and off the power source of the receiver according to the entry and exit of an individual into and from a monitor area. CONSTITUTION:Transmitting and receiving terminal equipments (SR) 211-2nl sends electromagnetic waves of specific frequencies repeatedly at a constant period for a specific time according to a command from a center equipment 5, and receive answer signals individual bodies IDs 71-7m that individuals in respective rooms 11-1n have. The reception from the IDs 71-7m is performed during transmission for a longer period than the constant period, the power-on period of the IDs 71-7m is synchronized with the constant-period transmission. Further, the power source of the individual bodies 71-7m are turned on and off according to the entry and exit of the individuals 71-7m into and from the rooms 11-1n.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is used in offices, laboratories, factories, etc. to recognize where a moving object such as an individual or a transport vehicle is located. It concerns methods of transmission and reception.

[Prior art] Conventionally, in order to prevent illegal entry into a specific security area, a card, badge, etc. is provided to a person who is permitted to enter the area, and the person is required to present these at the entrance, or the person is asked to insert the card into a card reader. , a method of identifying persons permitted to enter, a method of assigning a specific number, password, etc. to each person permitted to enter, and confirming the person permitted to enter by inputting it on a keyboard, etc., fingerprints, voice prints, etc. of the person permitted to enter, Techniques are generally employed in which the shape of blood vessels in the retina is used as a pattern, and photoelectric detection is used to confirm the person who is allowed to enter.These methods are used to identify the person who is allowed to enter.

In recent years, however, in order to improve the operating efficiency of each moving individual in offices, laboratories, factories, etc., and to make it easier to confirm the location of the target individual, each individual can be moved to any part of a large room or within a premises. There is a need to grasp the existence of PE-J from time to time, and to immediately transmit the necessary information to the target individual, or in the event of an emergency such as a fire, the presence of each individual It has become necessary to understand the area, communicate appropriate instructions, and take countermeasures intelligently.However, when using conventional methods, it is only possible to control access to specific areas, and it is not possible to control access to specific areas. The disadvantage is that each individual cannot be recognized at all times.

Therefore, as a countermeasure to this problem, an [individual recognition method] applied separately by the applicant is used to repeatedly transmit electromagnetic waves of the same specific wave number to a specific monitoring area for a predetermined period of time, so that each individual When the electromagnetic wave is received by the receiver prepared for this, after a delay time that is determined differently for each individual, each individual responds by transmitting electromagnetic waves of the same frequency to each individual by the transmitter provided for each individual, and this response is sent. A method has been proposed in which the delay time of each individual is detected by the reception of υ, and the presence of each individual within the monitoring area is determined based on the detection results.

[Problem that the invention seeks to solve]

However, since the transmitter/receiver included in each individual generally uses battery power, in order to prevent unnecessary consumption t1'' of the transmitter/receiver,
It is considered possible to turn on the receiver power in synchronization with the transmission of a certain period, but if this method is adopted, if a new enclosure enters the monitoring area and the The timing of the period transmission and the receiver power on period do not match,
This causes a problem in that the receiver cannot receive the constant periodic transmissions, and no response transmissions are performed.

Furthermore, if the receiver IFL source of the transmitter/receiver provided in each individual is always synchronized with the radio, if the individual leaves the monitoring area, a problem arises in that the battery is wasted unnecessarily.

[Means for solving problems]

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

That is, in the above method, after repeating transmission at a fixed period a specified number of times, transmission is performed for a period longer than the fixed period, and at the same time, the power of the receiver is turned on in synchronization with the transmission at a fixed period. The period in which the receiver is turned on is extended when transmission cannot be received for a specific period of time.

[For production]

Therefore, reception is always performed during transmission for a period longer than a fixed period, and this allows the receiver's electric field period to enter a synchronized state with the transmission for a fixed period.
If the individual leaves the monitoring area, the period during which the receiver is turned on is extended, reducing battery consumption.

〔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 terminal device (hereinafter referred to as SR) having the function of transmitting and receiving electromagnetic waves from 1 to 1n 2+t to 2+1 to 2n+ to
2nJ is installed, and these also have the function of a telephone, and are equipped with a duplexer for large signal volumes (hereinafter referred to as FDV) 3t1~
It is accommodated in the premises exchanger (hereinafter referred to as PBX) 4 via L+J to 3nl to 3nJ, and is also connected to FE, V
31s to 3nj to the central display of electronic computers, etc. (hereinafter referred to as
The CTF25 is also connected to the CTE5, and the CTF25 comes with operating devices (hereinafter referred to as the MM6) such as a keyboard, cathode ray tube display, and printer.

In addition, each of 5R211 to 2nj repeatedly transmits electromagnetic waves of a specific frequency for a predetermined period of time in response to a command from CTIE5, while each individual in each room 11 to 1n transmits an individual (hereinafter, lo ) 71~7m and possesses a badge that has the function of transmitting and receiving electromagnetic waves, and with this iL,
When receiving electromagnetic waves from 5R2u~2nj, each I[)
After a delay time that is set differently for each 71~7m, each 5R211~2nl receives a response transmission of electromagnetic waves with the same station wave number, and the delay is delayed. According to the result of detecting time for each individual, each ID
7. It is designed to detect the presence of up to 7 m.

For each SR2+t~2y1j, an effective range for transmission and reception is determined, and this is defined as a monitoring area 811~LJ~81j.
SR2, 1 to 2n1 are placed adjacent to each other and overlap each other as SRs 2 and 8nt, and each SR2, 1 to 2n1 adds its own address number to each detection result and sends it to CTES. Recognize in which part of which chamber I() exists, and M
It is displayed using MI6 or printed out periodically.

Figure 1 shows the transmission status of each SR2 and each ! D71~7m
This is a timing chart showing the response transmission status of (A).
), SR2 is the specific same wave number fo as in (a)
For example, a constant period T of s sec.

The transmission is repeated for each predetermined time To, and in each ID 7 + to 7m, the period from immediately before transmission (a) to immediately after the end of the predetermined time To is synchronized with the period TI. Then, turn on the receiver power (b) and send! When (a) is received, the timer for each ID71 to 7m starts based on the time when this ends, and a delay time t is set differently for each ID71 to 7m.
After 1 to tm have elapsed, each of them individually transmits responses (e) to (e) using the same number 8e and number fo.

Therefore, each SR2 has a delay time t! from the end of its own transmission until it receives response transmissions (c) to (e)! ~tm, it is possible to detect whether each ID7s~7m exists within its own monitoring area 8.

Then, in transmission (a), after repeating the transmission 1 at a constant period 'rl a specified number of times, the transmission (a) is performed at a constant period T! For example, Tp+T6 is transmitted as a period longer than that.
After the period Tp has elapsed, the transmission using the synchronization T1 is repeated again from the time when TI has elapsed, and the transmission of the period Tp+To is repeated every time the transmission of the synchronization T1 is performed a prescribed number of times.

Note that during the period Tp+T6, each of the IDs 71 to 7m suspends response transmission (c) to (e), and resumes response transmission at the end of the period Tp+T0.

CB) in the same figure shows a case where one of the 107s leaves the monitoring area 9 and then enters the monitoring area again.
When transmission (a) cannot be received for a specific time Ts, (b)
), the period for turning on the receiver power is extended to Tp, and the transmission (a) is performed at a constant period T1 or for a period Tp.
If the +'l'o transmission is received by 1δ, then 1 immediately after this ends.
The power source (b) is kept in the on state, and upon completion of transmission, the power source (b) is turned on again at a constant period Tl, and response transmission is resumed.

In addition, if n is an integer and the relationship Tp = n - TI is established, the relationship with the synchronization state of each ID71 to 7m existing on the SR2 and CTES side and in the monitoring area, and the new monitoring This is preferable in relation to the operation in which ID7 enters the area and smoothly enters the synchronized state.

Therefore, in the IDT, battery consumption is reduced by extending the power-on period, and when entering the monitoring area, it is possible to receive the transmission of the period Tp"To without fail, and from this point on, the period Tp"To is transmitted. The power is turned on in synchronization with the transmission of T1, and the response transmission is also performed accurately.

Also, the period of transmission (a) TI % 'rp'' To
and the predetermined time To constitute a timer and a kakunta for counting the number of transmissions corresponding to each other during CTES,
With these, the transmission command can be given to each SR2 at the same time, and the specific time Ts and extended synchronization Tp are
A corresponding timer and judgment control circuit may be provided in the D transmitter/receiver, and power-on control may be performed using these.

However, each delay time tI-trn can also be determined based on the start time of transmission (a).

Figure 3 shows the external appearance of the SR2, with the figure (Figure 3) being a plan view and CB) being a side view. It is equipped with a key detail 13, a display Fa14 such as a liquid crystal display, and a key #15 for transmitting and receiving data with the CTES, and the display 14 performs display for the telephone and display based on data transmission and reception. At the top of the back side, there is an antenna 1 for transmitting and receiving electromagnetic waves.
6 is provided. In addition, SR2 can be used as a function phone and
It has a built-in electromagnetic wave transmitting section, receiving section, and related control section, etc., and transmits and receives data to and from the CTE5 using a specific sound PFiU wave number signal outside the communication band.

Figure 4 is a block diagram of SR2, and the control section (hereinafter referred to as
CNT) 21, transmitter (hereinafter referred to as TX) 22t122
2. Receiving unit (hereinafter referred to as RX) 23+ 1232, and
The CNT 21 is roughly divided into telephone circuits (hereinafter referred to as ``CPU'') 24, and the CNT 21 is a telephone circuit (hereinafter referred to as ``CPU'')
)211, fixed memory (hereinafter referred to as ROM)
212, a variable memory (hereinafter referred to as RAM) 213, and interfaces (hereinafter referred to as I/F) 214 to 217 are arranged around the periphery, and these are connected by a bus bar, and from the I/F 214, control signals to the TX 22t and 222 are transmitted: In addition to sending control signals to the selector (hereinafter referred to as 5EL) 25, depending on the I/F 217, RX23+, 23
I/F 2 which has a transmitting and receiving function accepts received outputs from 2 and sends control signals to these.
A telephone line 28 from the PBX 4 is connected to the key group (hereinafter referred to as KG) 13 via a modulator/demodulator (hereinafter referred to as MDM) 26 and a high frequency frequency filter (hereinafter referred to as HPF) 27 at I/F 216. and display device (hereinafter referred to as DP) 14
is connected! l), for DP14
A display signal from 24 is also provided.

In addition, TgL24 is a low-frequency f-wave device (
Hereinafter, it is connected to the telephone line 28 via the LPF 29, and is capable of freely transmitting calls through the device 28, regardless of data transmission and reception by the MDM 26 via the HPF 27 (9).

TX22s and 2h each have a tube wave number si/sizer (
(hereinafter referred to as FSY) 221+, 22h, modulator (hereinafter referred to as M
OD) 222+, 22h, and a power amplification stage (hereinafter referred to as PA) 223+, 223z having a predetermined bandwidth, and FSY221 according to the control of CNT21.
The respective generation frequencies of t and 2212 are determined, and MOD2
22+.

Intermittent modulation is performed at 2222 and PA 2331
.

After being amplified by 2332, it is sent as a transmission output to SEI:L25, and either one of the transmission outputs is selected by the response of 5EL25 under the control of CNT21, or both outputs are mixed, and then sent to the antenna multiplexer ( Hereinafter, it is transmitted as an electromagnetic wave from the antenna 16 via the MPX) 30.

On the other hand, RX231.232 is a band MP waveform filter (hereinafter referred to as BPF) 231+, 2312, and a high frequency amplification stage (hereinafter referred to as HFA) 232+, 232? , mixer (hereinafter referred to as MIX) 233+, 2332, tD FS for local oscillation
Y234t, 234I intermediate frequency increase 1 stage (hereinafter referred to as IF input,
) 235+, 2352, level selection circuit (hereinafter referred to as L) that blocks noise components by passing only signals above a specified level.
SE) 236I, 2361% demodulator (hereinafter referred to as OEM)
237t.

23γ? , waveform shaper (hereinafter referred to as WF) 238+, 2382, automatic gain control circuit (hereinafter referred to as AGC) 2391.239. The FSY234 corresponds to the control of the CNT21.
+, the reception frequency is fixed by the generation wave number of 2342,
According to the control of CNT21, TX22+ and 22z are turned off during transmission, and during reception input from MPX30 via gate circuit (hereinafter referred to as GT) 31 which is turned on at other times. Extract only the wavenumber component, )TF'A232+,
2322, converted to the same intermediate wave number in MrX233t and 2332, and then IFA235s and 23
LSg236 further amplified by 52 and using a comparator etc.
1123h extracts signal components above the specified level, and detects them in DEM237+ and 2372.
After being subjected to waveform shaping and conversion into a pulse train by the WF23BK and 2382, it is given to the CNT21 as a reception output.

In addition, from CNT21, each pulse a of receiver 1 output
A reset signal is sent in response to the recognition, and the WF238112
It is used to reset the integration circuit in the 382.

In contrast to the above, the CPU 211 in the CNT 21 is R
Execute the instructions in OM212 and save the required data to R.
The control operation is performed while accessing the AM 213, and in response to the command from the CTE 5 via the MDM 26 and the I/F 215, the TX 22□ and 222 are placed in the transmitting state, and the transmission shown in FIG. 1(a) is repeated. RX2:l sends a response from ID7+-7m corresponding to
, 2h, and each delay time tx ” tty + t according to each reception output via I/F 217
Detected by the timer configured in the CPU 211,
The result recognized by this is temporarily stored in the RAM 213, and then sent to the CTT 25 via the I/F 215 and MDM 26.
Send it as recognition data to.

When there are a large number of Ml, ID7t to ID7m, there is a limit to the number of delay times ts and tm that can be allocated using only a single frequency fo.For example, different frequencies fl and fz may be used at the same time. For this purpose, TX
There are two systems each for 221.2h, RX23t, and 23tomi.

Further, the CPU 211 responds to the operations of the KG 13 to set each transmission and reception frequency, and to set and update each data for control and recognition, and displays these conditions on the DP 14.

Figure 5 shows the shape of the transceiver possessed by ID7,
(B) is a front view, and (B) is a cutaway side view of the main parts, showing a disc-shaped case 31, a ring 32 that is screwed onto the front surface of the case, and a ring 32 that is attached between the inner surface of the periphery and the case 31. It consists of a transparent cover 33 and a card 34 that are held together, 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 back plate 35, which allows it to be attached to a pocket etc. It is easy to fasten and dust, and the entire card is shaped like a badge, and information such as location, name, name, etc. can be freely written on the card 34.

1. Inside the case 31, there is an integrated circuit 38 mounted on a printed circuit board 37 and a button-shaped glue battery 3.
9, etc., and an antenna 40 is buried in a ring-shaped groove provided on the outside of the periphery of the case 31.
1, the head of a power switch PS using a lock-type pushbutton switch is exposed.

FIG. 6 is a block diagram of the transceiver shown in FIG.
RX41, TX42 and CNT43 are the main components, and RX41 and TX42 are RX23 in Fig. 4.
and TX229, RX41 is BPF
411, HFA412, MIX4i3, FSY414,
HFA415, LSE416, DEM417, WF
418, AGC419, and TX42 is F
It is composed of SY421, MOD422, and PA423, and CNT43 is also the CNT in Fig. 4.
21, CPU431, ROM432, RAM
433, I/F 434 to 437, and I/F
It accepts the received output from RX 41 and controls RX 41 via I/F 435, and controls TX 42 via I/F 436.

The I/F'434 is equipped with a setting device (hereinafter referred to as SgT )438 is connected, and I/F4
37, from battery 39 to RX41 and T
Each control input of a switch circuit (hereinafter referred to as 5W) 44.45 including a switching element that supplies power to each X42 is connected, and when the CNT43 starts operating in response to turning on the power switch PS, the CPU431
The transmission period T of SR2 is determined by the timer configured in
Turn on υsw44 as shown in Figure 1(f) according to
) is controlled on/off by SW44,
The SW 45 is controlled to be turned on only during the period when the TX 42 transmits a response.

Note that, similar to the SR2, the CPU 431 executes instructions in the ROM 432 and performs control operations while accessing necessary data to the RAM 433.
31 The delay time tl − is determined by the timer configured in
tm regulations.

Therefore, the transmission of SR2 is performed using antenna 40° MPX4.
ti is received by RX41, and its WF4
18, a timer is started by the CPU 431 in response to the generation of the same output, and according to the time-up of this timer, the TX 42 transmits a response for the period to shown in FIG. 1 (4). It will be done.

In addition, the CPU 431 monitors the specific time Ts using the same timer as mentioned above, and if it cannot receive 9 signals from SR2 during this time, it uses a separate timer to execute the extended synchronization Tp.
(/(5W44) is started, and when reception resumes, the control returns to the control shown in FIG. 1. This prevents the battery 39 from being consumed unnecessarily.

Therefore, if ■DT leaves monitoring area 8, battery 3
9 consumption is reduced, and when newly entering monitoring area B and taking action, the period T p + T due to SR2
The RX 41 will always receive this during the transmission of 6, and from then on, the transmission period T will be constant.

Since the power of RX41 is turned on in synchronization with this, response transmission is performed accurately in accordance with this, and each SR2 can reliably detect I[>7.

However, the period Tp+T may be set longer,
The prescribed number of transmissions in the fixed period T1 may be determined according to the required detection accuracy of each ID 70, and the specific time 'rs and the extension period Tp may also be determined according to the conditions.

In addition, in Fig. 2, each 5R211 to 2nj and CT
l1l:5 may be connected by a dedicated transmission line,
The same effect can be achieved by fixing each 5R2u to 2rJ to the ceiling, wall, etc., or by burying them, so the shape shown in Figure 3 can be selected accordingly, and a digital type can be used as the PBX4, and multiplexing can be performed according to this. +r even if you select the
Mr. q may configure CTE5 by a combination of /41 logic circuits.

In addition, in Figure 4 and Wc6, FSY22
1t.

2212.421 control to perform sound wave number modulation,
MOD222+, 222! , '422 control υ
Amplitude modulation or a combination of both may be used.
It is only necessary to select the configuration of each RX2:l, 232.41 according to this, and depending on the conditions, each FSY221+
.

A single frequency crystal oscillator can also be used instead of 2212.234+, 234z, 414.421.

In addition, in the configuration of FIG. 4, the number of TX221.222 and RX231.23g may be larger, or each year may be changed to CNT21.222 and RX231.23g.
43 does not specifically use CI'U211.431, and is a color/
The same effect can be obtained by using combinations of logic circuits and various logic circuits, etc., and the shape shown in Fig. 5 may be determined depending on the purpose.For personal use, it may be used as a rectangular badge or card shape. In the case of a vehicle, various modifications can be made at will, such as a magnetically adsorbed plate shape.

〔Effect of the invention〕

As is clear from the above explanation, according to the present invention, even IDs that newly enter the monitoring area can reliably receive transmissions from the SR, and from now on, they will respond in response to transmissions from the SR. Once the transmission is done and the ID leaves the monitoring area, battery consumption will be at a minimum.
Remarkable effects can be obtained in individual recognition for various purposes.

[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 (A) is a plan view. Fig. 4 shows the SR block diagram, Fig. 5 shows the ID transceiver, (A) shows the front view, and (B) shows the front view.
) is a cutaway side view of essential parts, and FIG. 6 is a block diagram of the transceiver shown in FIG. 5. 211~2ns...SR (transmission/reception terminal), 5.
...CTE (solid equipment), 6...MMI (manipulation device), T! ~7m fist...ID (individual), 81~8nj
...Bone monitoring area, 16.40...Antenna, 21.43.Φ...CNT (control unit), 22. ．． 22
2.41...TXII, transmitter), 231.2h
, 42...RX (receiving section), 30.46
...MPX (multiplexer), 31...
GT (gate circuit), 39...-Battery, 44.45.
...SW (switch circuit), To...predetermined time, T1...fixed period, t, ~tm...delay time, Ts...specified time, Tp...extension period.

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. In the method of recognizing the presence of each individual in an area, after repeating the transmission at the fixed period a specified number of times, transmitting for a period longer than the fixed period, and turning on the power of the receiver at the fixed period. An individual recognition transmission/reception method characterized by turning on the receiver in synchronization with transmission, and extending the cycle of turning on the power of the receiver when the transmission cannot be received for a specific time.