JPH0575863U - Mobile station identification information storage device - Google Patents

Abstract

(57) [Abstract] [Purpose] An object of the present invention is to provide a data storage memory of an ID card as a mobile station by serial access at low cost. [Configuration] A mobile station receives a transmission request signal transmitted from a fixed station, transmits a unique identification code from this mobile station,
This is a fixed station that determines whether or not it is registered and controls the controlled device.In the mobile station, the unique identification code is serially stored, and serially from the beginning by a read clock. It has a serial ROM for output. Then, the unique identification code is read out bit by bit in synchronization with the clock signal, the carrier signal is sequentially modulated by this data, and serially transmitted in time series as a serial bit string from the antenna. Even when the identification code of the serial ROM is rewritten, the bits forming one word are sequentially stored in synchronization with the clock signal.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an identification information storage device for a mobile station, which is adapted to transmit a unique identification code signal when the mobile station approaches a fixed station and detects a transmission request signal from the fixed station. is there.

[0002]

[Prior Art]

 For example, in order to allow only a specific person to enter and exit a specific entrance / exit, conventionally, an ID card as a mobile station with an identification code is issued and the ID card is installed at the entrance / exit or on the side of the entrance / exit. I inserted it into the card reader and judged whether it was an identification code given only to those who could enter the room, and if it matched, the door was opened. Similarly, at automatic ticket gates at stations, when a commuter pass is inserted into an automatic ticket gate, it is determined whether the stored identification code is normal, and if normal, the door or arm is opened.

[0003]

[Problems to be solved by the device]

 However, the ID card as a mobile station needs to store its own unique identification code in its internal memory. Normally, when this data is rewritten from the outside, it may be called digital processing. Although there were parallel accesses, there was the problem that the cost was high because many pins were needed to connect the 8-bit data line and several control lines.

An object of the present invention is to provide a data storage memory of an ID card as a mobile station by serial access at low cost.

[0005]

[Means for Solving the Problems]

 According to the present invention, a mobile station receives a transmission request signal transmitted from a fixed station, transmits a unique identification code from the mobile station, and the fixed station determines whether or not it is registered and controls The mobile station includes a serial ROM that serially stores the identification code and outputs the identification code serially from the beginning according to a read clock. This is a device for storing identification information of mobile stations.

[0006]

[Action]

 When the reset pulse signal is repeatedly sent from the fixed station central control circuit to the fixed station, the fixed station issues a transmission request signal. Then, the mobile station drives the timer circuit and oscillates the first clock signal and the second clock signal.

In the first clock signal, a unique identification code consisting of 4 to 6 digits, each word being 8 bits, is read out bit by bit in synchronization with the clock signal, and the data is used to sequentially modulate the second clock signal. , Serially transmit in time series as a serial bit string from the antenna. The identification code signal of the mobile station is sequentially detected and demodulated by the fixed station, amplified and waveform shaped, and input to the microcomputer. It is determined whether the identification code input by this microcomputer is registered. If registered, it controls the controlled machine such as opening and closing the door. Even when the identification code of the serial ROM is rewritten, the bits constituting one word are sequentially stored in synchronization with the clock signal.

[0008]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 3 is an overall block diagram showing the relationship between a fixed station and a mobile station (hereinafter referred to as an ID card), and shows a case where a plurality of fixed stations are centrally managed at one place. Of course, the present invention can be applied to only one fixed station and one ID card. Further, as a controlled device, for example, a case where an ID card having a specific identification code is detected by a fixed station to automatically open and close the door will be described.

A fixed station A11, a fixed station B21, a fixed station N31, ... Are installed directly or near the doors 12, 22, 32, ... As the controlled machines. These fixed stations 11, 21, 31, ... Are connected in parallel to a fixed station centralized management circuit 40, and this fixed station centralized management circuit 40 is further connected to a control circuit 41. The management circuit 40 controls opening / closing of the doors 12, 22, 32, ... As the controlled machines. When the ID card A10, the ID card B20, the ID card N30, ... Receive the transmission request signals from the fixed stations 11, 21, 31 ,.

The ID card 10 (the same applies to 20, 30, ...) And the fixed station 11 (the same applies to 21, 31, ...) Will be described in detail with reference to FIG. The fixed station 11 includes an antenna 50 for receiving a signal from the ID card 10, a tuning circuit 51 for extracting a specific signal from the received signal, an amplifying circuit 52 for voltage amplification, and a waveform shaping for shaping an input signal waveform. A circuit 53, a microcomputer 54 for exchanging signals with the fixed station centralized control circuit 40, a transmission request signal generation circuit 55 for generating a transmission request signal at a constant time interval from the microcomputer 54, and ASK modulation of this transmission request signal. It comprises a modulation circuit 56, an amplification circuit 57 for current amplification, and an antenna 58 for transmitting radio waves to the ID card 10.

The ID card 10 includes an antenna 60 for receiving a signal from the fixed station 11, a tuning circuit 61 for extracting a specific signal from the received signals, a waveform shaping circuit 63 for shaping an input signal waveform, and this waveform. A timer circuit 64 that starts operation with the first signal from the shaping circuit 63, a clock generation circuit 65 that oscillates a clock signal at the output of the timer circuit 64, and a first clock generation circuit 65 at the output of the timer circuit 64. A second clock generation circuit 66 that oscillates a high frequency clock signal, an identification code generation circuit 67 that outputs a self-specific identification code in response to a read clock signal from the first clock generation circuit 65, and this identification code generation A modulation circuit 68 for ASK-modulating the frequency of the second clock generation circuit 66 according to the identification code of the circuit 67, the fixed station 1. 1 comprises an antenna 70 for transmitting radio waves.

As shown in FIG. 2, the identification code generation circuit 67 includes a serial ROM 80 for storing a self-specific identification code. The serial ROM 80 receives a clock signal from the first clock generation circuit 65 that oscillates by the timer circuit 64 and a reset signal from the timer circuit 64, and serially accesses and outputs as data. Is.

The operation of the above configuration will be described with reference to the waveform chart of FIG. (1) When the fixed station central control circuit 40 is powered on, reset pulse signals such as A1, B1 and N1 are repeatedly sent to the fixed stations 11, 21, and 31 in a time-division manner. For example, if there are three fixed stations 11, ..., First, a fixed pulse signal of 500 ms is sent to the fixed station 11, then a reset pulse signal of 500 ms is sent to the fixed station 21, and then the fixed station. A reset pulse signal of 500 ms is sent to 31. Then, the reset pulse signal of 500 ms is sent to the fixed station 11 again, and this is repeated thereafter.

(2) In response to the reset pulses A1, B1, and N1 from the fixed station centralized management circuit 40, the fixed stations 11, 21, and 31 respectively transmit transmission request signals. The exchange of signals with the ID card 10 will be described. When a signal is output from the microcomputer 54 by the reset pulse A1 from the fixed station central control circuit 40 and a transmission request signal is output from the transmission request signal generation circuit 55, this is ASK modulated by the modulation circuit 56 and the amplification circuit 57. The current is amplified by and the transmission request signal A2 of FIG. 3 is repeatedly transmitted from the antenna 58 at regular intervals.

(3) The tuning circuit 61, the amplification circuit 62, and the waveform shaping circuit 63 are always operating and detect the presence or absence of the transmission request signal A2. Here, assuming that the ID card 10 has entered the receivable area of the transmission request signal A2 by the fixed station 11, the antenna 60 and the tuning circuit 61 of the ID card 10 receive the transmission request signal A2, The signal level input to the waveform shaping circuit 63 exceeds the preset threshold, and the waveform shaped signal is output from the waveform shaping circuit 63, and the timer circuit 64 is driven for the first time to generate the first clock. Different clock signals are oscillated from the circuit 65 and the second clock generation circuit 66, respectively.

The first clock generation circuit 65 starts oscillating by the timer circuit 64 and inputs it to the serial ROM 80 as a clock signal. At the same time, the signal from the timer circuit 64 is input to the serial ROM 80 as a reset signal. With these signals, a unique identification code consisting of 4 to 6 digits, each word being 8 bits, is read out bit by bit in synchronization with the clock signal. At this time, the identification code is added with an odd parity check when the number of "1" bits is odd, an even parity check when the number of "1" bits is even, etc. for each code. .. The identification code from the identification code generation circuit 67 is ASK-modulated by the modulation circuit 68 with respect to the clock signal of the second clock generation circuit 66, and the signal A3 of FIG. To call in sequence.

(4) The identification code signal A3 of the ID card 10 is detected and demodulated by the antenna 50 and the modulation circuit 51 of the fixed station 11, the voltage is amplified by the amplification circuit 52, the waveform is shaped by the waveform shaping circuit 53, and the microcomputer 54 To enter. The microcomputer 54 determines whether or not the input identification code is registered.

(5) If registered, the fixed station number of the fixed station 11 is added to the identification code and the signal A4 of FIG. 4 is output from the microcomputer 54 to the fixed station centralized management circuit 40.

(6) The data A4 input to the fixed station central management circuit 40 is converted into predetermined data and output to the control circuit 41.

(7) The control signal from the control circuit 41 controls such as opening the door 12 as a controlled machine, and when a person carrying the ID card 10 passes by, it is regarded as a controlled machine. The door 12 of is closed.

Even when the identification code of the serial ROM 80 is rewritten, the bits forming one word are sequentially stored in synchronization with the clock signal.

In the above description, the relationship between the ID card 10 and the fixed station 11 has been described, but the relationship between the ID card 20 and the fixed station 21 and the relationship between the ID card 30 and the fixed station 31 are the same. Is.

[0023]

[Effect of the device]

 According to the present invention, as described above, the mobile station is equipped with the serial ROM that serially stores the unique identification code and serially outputs the read code from the beginning, so that, for example, one word is 8 words in the clock signal. A unique identification code consisting of 4 to 6 digits is read bit by bit in synchronization with the clock signal, and the carrier signal is sequentially modulated by this data, and can be sequentially output as a serial bit string in time series. Also, when the identification code of the serial ROM is rewritten, the bits forming one word are sequentially stored in synchronization with the clock signal. Therefore, the advantages are that it is inexpensive, can be made compact, and is not limited to the installation location.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of an identification information storage device of a mobile station according to the present invention.

FIG. 2 is a specific block diagram of an identification code generation circuit.

FIG. 3 is an overall block diagram of an apparatus according to the present invention.

FIG. 4 is an output waveform diagram of each unit.

[Explanation of symbols]

10 ... ID card A as mobile station, 11 ... Fixed station A,
12 ... Door as controlled machine, 20 ... I as mobile station
D card B, 21 ... Fixed station B, 22 ... Door as controlled device, 30 ... ID card N as mobile station, 31 ... Fixed station N, 32 ... Door as controlled device, 40 ... Centralized control of fixed station Circuit, 41 ... Control circuit, 50 ... Antenna, 51 ... Tuning circuit, 52 ... Amplification circuit, 53 ... Waveform shaping circuit, 54 ...
Microcomputer, 55 ... Transmission request signal generation circuit, 56 ... Modulation circuit, 57 ... Amplification circuit, 58 ... Antenna, 60 ... Antenna, 61 ... Tuning circuit, 62 ... Amplification circuit, 63 ... Waveform shaping circuit, 64 ... Timer circuit, 65 ... first clock generation circuit, 66 ... second clock generation circuit, 67 ... identification code generation circuit, 68 ... modulation circuit, 69 ... amplification circuit, 70 ... antenna, 80 ... serial ROM.

Claims (1)

[Scope of utility model registration request] 1. A mobile station receives a transmission request signal transmitted from a fixed station, transmits a unique identification code from the mobile station, and the fixed station determines whether or not the identification code is registered and controls the control. In the mobile station, the mobile station comprises a serial ROM that serially stores the identification code and outputs the serially from the beginning according to a read clock. Identification information storage device.