JPH01161597A - Identification unit of non-contact identification system - Google Patents

Abstract

PURPOSE: To save power consumption while keeping a long distance for receiving the trigger signals of an identification body and to prolong the service life of a battery by providing a means for amplifying received code signals and the means for controlling the ON/OFF of the power source part of the means. CONSTITUTION: When a person possessing this identification body B approaches a part where the trigger signals are originated, the trigger signals received in a reception part 13 resonate in an LC resonance circuit and a resonance voltage is generated. The resonance voltage is amplified in an amplifier 18, and when the amplified voltage becomes more than a fixed value, a switch 16 is turned ON, the power of a power source part 17 is supplied to a transmission control part 11 and its own identification code stored in a present code storage part 15 is transmitted by a transmission part 10. In this case, operation time is decided by a timer 19 so as not to operate the identification body B for the prescribed time and the ON/OFF control of the power source part 17 of the amplifier 18 is performed by a power source control circuit 20.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an identifier for a non-contact identification system used in a system for controlling access to and from a controlled location.

[Conventional technology]

In general, this non-contact identification system for lumberjacks is shown in Figure 2 (al.
As shown in Figure 1, there is a monitor controller η) that is installed at the entrance of the controlled area and controls the opening/closing mechanism of the entrance/exit gate, etc. The identification body, for example, an identification card (Bl), is attached to or held in a vehicle, and operates in the following manner.

That is, on the monitor controller side, the transmission control section (3) sends the code request signal to the transmission section (2).

A bird with a specific frequency is constantly sending out a signal from the antenna (1). On the other hand, when the identification card (Bl) approaches the area where the bird can receive the signal, its antenna α
2, the reception unit 113 receives the code request signal, the discrimination processing unit I detects the code request signal, transmits it accordingly, the control unit I retrieves the identification code stored in the own code storage unit t1!9, and outputs the identification code as a response signal. The signal is transmitted from the transmitter lIG and the antenna (9) to the monitor controller (Al.The monitor controller receives the response signal from the identification card (Bl) by the antenna (4) and the receiver (5), and sends it to the discrimination processor 1. At step (6), it is determined whether the identification code in this reception response signal is the same as the identification code stored in the code storage section (7).

The result is sent to the control section (8). The control unit (8) performs predetermined processing control such as opening and closing of the gate entrance based on the sent determination results.

In the non-contact type identification system configured as described above, it would be inconvenient if the distance at which the identification object, that is, the identification card IB+, can receive the trigger signal from the monitor controller is extremely short.

It is necessary to extend this distance to some extent, but if the trigger signal transmission power is increased for this purpose, there is a problem that the monitor controller (Al) becomes large and expensive.

Conventionally, attempts have been made to solve this problem by providing an amplifier aS that amplifies the signal received by the receiving section a3 of the identifier (Bl), as shown in Figure wJ3.

That is, FIG. 3 is a configuration diagram schematically showing an identifier of a conventional non-contact type identification system, and in FIG. 1, a3 is LC.
A receiving section for receiving a trigger signal consisting of a resonant circuit, or a transmitting section for transmitting an identification code, tle is a low power consumption CMO
S analog switch, 1 is the own code storage section that stores the identification code, +111 is the transmission control section that extracts and transmits the identification code, anl is the power supply section such as a lithium battery, fi
II is an amplifier that amplifies the LC resonance voltage generated by the trigger signal received by the receiver a3.

Next, to explain the operation of this object, this identifier 1
When a person in possession of 81 approaches the monitor controller (AI) that is emitting a trigger signal, the trigger signal received by the receiver a3 resonates with the LC resonant circuit and generates a resonant voltage. This resonant voltage is amplified by the amplifier fill. When the voltage of this amplifier reaches a certain level or higher, the analog switch ae of 0MO8 is turned on.Then, the transmission control section fi
The gL source of the power supply section aS is connected to υ, and the own code storage section a! 9
The transmission member will transmit the identification code stored in , and the operations described in Figure i@2 will be performed.

[Problem that the invention seeks to solve]

The conventional non-contact type separate unit had an active amplifier aS inserted after the common circuit as described above, which had the problem of high steady power consumption and shortening the lifespan of the power supply part fiη such as a lithium battery. .

Moreover, if the trigger signal receiving section α3 is configured from a passive LCC common circuit to reduce power consumption, #! Another body(
This results in the original problem of shortening the distance at which the Bl trigger signal can be received, causing inconvenience.

This invention was made in order to solve the above-mentioned problems, and provides an identifier for a non-contact identification system that saves power consumption and has a long battery life while maintaining a long distance for receiving the trigger signal of the identifier. The purpose is to obtain.

[Means for resolving issues]

The identification body of the non-contact identification system according to the present invention receives a code signal and emits its own identification code, and includes an amplifier that amplifies the received code signal, and an ON/OFF switch for the The present invention is characterized in that it is provided with an IE power supply control circuit for controlling.

[Effect]

In the identifier according to the present invention, in order to increase the distance at which the trigger signal can be received by the receiver, the signal is amplified by an amplifier, and during the operation time of this amplifier, the illumination control circuit is used to extend the battery life of the power supply. can be controlled and determined by

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIG.
In Figure 1, fitlfin) (13fiJαe
αηa8 is the same as the conventional one shown in FIG. 3 described above, as indicated by the same reference numerals, and the explanation thereof will be omitted. (1
9 is a timer for selecting the operating time of the identifier (B1), and 2 is a power supply control circuit for controlling ON/OFF of the power supply section fiη, which serves as the power supply for the amplifier side.

Next, the operation will be explained. Long, non-contact identifier IB
When a person carrying Ii approaches a place where a trigger signal is being emitted, the trigger signal received by the receiver O resonates in the LCC common circuit and generates a resonant voltage.

This resonant voltage is amplified by the amplifier fig, and when this amplified voltage exceeds a certain level, the 0MO8 analog switch (Ie turns on), which supplies power from the power supply unit +171 to the transmission control unit 0υ, and connects the own code storage unit. The transmitter +11 transmits its own identification code stored in T1.By the way, the amplifier a second generally consumes a large amount of power.
If this continues, the lithium battery that serves as the power supply will run out soon, so for example, set the operating time using the timer US so that the identifier IBI only operates for 8 hours during the day.
The power supply section r1n of the amplifier Os is turned on by the power supply control circuit ■.
-Perform OFF control. Incidentally, instead of using the timer α9, an external reset operation time may be determined.

In this way, if the power supply unit (1711) that is the power source for the amplifier aS is controlled ON-OFF by the power supply control circuit 121K, and the operating time of the amplifier can be determined as necessary, the power f:'ni can be reduced accordingly. .

Note that even when the amplifier us 2 is OFF, if the separate body (Bl″f, l-IJ) is brought closer to the place where the signal is being emitted.

Needless to say, it can be made to work.

Further, in the above embodiment, the case where the signal is a radio wave is shown, but it is clear that the signal may be one using light such as infrared rays.

〔Effect of the invention〕

As described above, according to the present invention, the power supply of the amplifier is controlled ON-OFF.

This has the effect of saving power consumption and extending the life of the battery that serves as the power source.

[Brief explanation of the drawing]

FIG. 1 is a block diagram schematically showing a non-contact type identification body according to an embodiment of the present invention. FIG. 2 is a block diagram illustrating the configuration of a non-contact identification system, and FIG. 3 is a schematic configuration diagram showing a conventional non-contact identification body. In addition, the same symbols in Figure 9 indicate the same or equivalent parts, f
il is a transmitting section, t13 is a receiving section, salmon is a power supply section, am is an amplifier, f19 is a timer, and ■ is a power supply control circuit.

Claims (1)

[Claims] In a device in which the receiving section receives a code signal, extracts its own identification code, and emits the identification code from the transmitting section, an amplifier is provided to amplify the received code signal, and the power supply section of this amplifier is turned on. - An identifier for a non-contact identification system, characterized in that it is provided with a power supply control circuit for OFF control.