JPH0784033A - Responder - Google Patents

Abstract

PURPOSE:To confirm and alter data without using an interrogator. CONSTITUTION:A microcomputer 25 has serial input and output ports RXD, TXD. The responder comprises connecting terminals T1, T2 for connecting a data setter for reading and writing data in a wired system, and an interface 32 for communicating data with the setter. The responder also comprises an OR circuit 33 which executes an OR operation of an output of the interface 32 at the responder side and an output of a receiver 40 and inputs it to the port RXD. The port TXD is connected to an input of the interface 32 at the responder side. The responder transmits the data via the wired system.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transponder in a mobile communication system including a transponder mounted on a mobile unit and an interrogator for performing data communication with the transponder.

[0002]

2. Description of the Related Art A mobile communication system including a responder mounted on a mobile unit and an interrogator for performing data communication with the responder is proposed in Japanese Patent Application Laid-Open No. 64-84175. There is a mobile identification device. This mobile body identification device includes a transponder mounted on the mobile body, and an interrogator that communicates with the transponder by radio waves to write data to the transponder and read data from the transponder.

In this mobile communication system, radio waves (mainly microwaves) are transmitted from the interrogator, which is generally fixed and installed, toward the mobile body. Then, in the transmission of data from the interrogator to the responder, the transmission data is temporarily FSK-modulated, the FSK-modulated signal is AM-modulated and transmitted to the responder. In the transponder, the transmitted signal is received and detected, and F
Data is obtained by SK demodulation. The data indicates an instruction to return an identification code from the interrogator. As a result, the transponder is ready to return data.

Then, the interrogator transmits an unmodulated transmission wave to read the data of the responder. The transponder receiving the unmodulated transmission wave performs phase modulation on the transmission wave with the FSK-modulated modulated signal of the reply data, and sends back to the interrogator. The interrogator performs phase comparison between the received output of the reply wave and the output obtained by shifting the carrier wave of the transmission signal,
Demodulate into a K-modulated signal and then perform FSK demodulation to obtain data. That is, the mobile body is identified by receiving the data such as the identification code from the responder.

A schematic of the transponder is shown in FIG. In the responder of FIG. 7, when the receiving unit 1 receives a command from the interrogator, the control unit 25 including a microcomputer reads the data stored in the memory 26, and the reply unit 41 transfers the data to the interrogator. It is configured to reply.

[0006]

In the mobile communication system described above, reading and writing of data from and to the transponder can be performed only by a wireless method. That is,
It was always necessary to confirm or change the data of the transponder via the interrogator. Therefore, check the data on the responder side.
The inconvenience was that we couldn't make any changes. Also,
If data needs to be exchanged between the transponder and the interrogator, the interrogator is also required on the mobile side, and the configuration is complicated.

The present invention has been made in view of the above points, and an object of the present invention is to provide a responder capable of confirming and changing data without using an interrogator. is there.

[0008]

In order to achieve the above-mentioned object, the invention of claim 1 outputs a serial input port for inputting transmission data from an interrogator and data stored in a memory to a reply section. A serial output port is provided in the control unit, a connecting means for connecting a data setting device for reading and writing data in a wired manner, an interface for performing data communication with the data setting device, and an output on the responder side of the interface And an output circuit of the receiving unit, and an OR circuit for inputting the logical OR of the output to the input port of the control unit is provided.

Further, in the invention of claim 2, a first serial input port for inputting the transmission data from the interrogator, a second serial output port for outputting the data stored in the memory to the reply section, and In addition to the first serial input / output port, the control unit is provided with a second serial input / output port individually, and between the connection means for connecting the data setting device for reading and writing data by a wired method, and this data setting device. An interface for data communication is provided, and the input / output on the responder side of the interface is connected to the second input / output port.

According to the third aspect of the invention, the control section is provided with a serial input port for inputting the transmission data from the interrogator and a serial output port for outputting the data stored in the memory to the reply section, and the reading / writing of data is performed. The data setting device is provided with a connecting means for connecting the data setting device in a wired manner, and an interface for performing data communication with the data setting device,
The input / output on the responder side of the interface is connected to the general-purpose port of the control unit.

[0011]

According to the invention of claim 1, with the above configuration, the data setting device is connected to the transponder by the wired system through the connecting means, and the data is transmitted between the interrogator of the control unit. The serial I / O port is also used as an I / O port for data transmission between the data setting device and the control unit, enabling data transmission between the data setting device and the control unit via an interface, and an interrogator Data can be checked and changed with the data setting device without using it.

According to a second aspect of the present invention, when the control unit individually has a serial input / output port, the I / O port is used as an input / output port for data transmission between the data setting device and the control unit. Data can be transmitted between the data setting device and the control unit via the data setting device, and the data setting device can check and change the data without using an interrogator.

According to the third aspect of the present invention, the general-purpose port of the control unit is used as the input / output port for data transmission between the data setting device and the control unit, and the data setting device and the control unit are connected via the interface. Data can be transmitted and received, and data can be confirmed and changed by the data setting device without using an interrogator.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Before describing the present invention, a mobile communication system to which the present invention is applied will be described below. 2 to 4 are block diagrams of the mobile communication system of the present invention. As shown in FIG. 4, the mobile communication system of the present embodiment is a transponder (hereinafter referred to as a data carrier) B mounted on the mobile unit and an interrogator for performing data communication between the data carrier B and the responder. (Hereinafter referred to as a read-writer). In the data communication between the read / write A and the data carrier B, the read / write A transmits data to the data carrier B (writes data) and returns data from the data carrier B ( The data held by the data carrier B is read out).

In the mobile communication system of this embodiment, the read / write A performs data communication with the data carrier B under the control of the controller C. Here, the controller C can control up to two lead-writers A, and the lead-writer A is supplied with power (24VDC) via the controller C. Here, the schematic operation of the mobile communication system of the present embodiment will be described first. Upon receiving the command from the controller C, the read writer A sends this command to the data carrier B. Here, the command sent from the read / write A to the data carrier B means the write data. After that, a non-modulated transmission signal is transmitted to the data carrier B so that the return data can be received.

Upon receiving the transmission signal from the read / write A, the data carrier B executes the processing according to the command content of the transmission signal. Then, the processing result is returned to the read / write A. Upon receiving the reply signal, the reader / writer A sends the processing result to the controller C. The configuration of each unit will be described below with reference to FIGS. 2 and 3.

As shown in FIG. 3, the internal structure of the read / write unit A includes a high frequency unit (hereinafter abbreviated as RF unit) a ₁ and an intermediate frequency unit (hereinafter abbreviated as IF unit) a _2. Be separated. RF unit a
_As shown in FIG. 2, ₁ is a carrier signal of the transmitted wave (2.45).
The oscillator 1 for oscillating GHz, the output adjustment unit 2 for stabilizing the output level of the oscillator 1, and the output path of the output adjustment unit 2 are switched to switch the read / write A to the transmission / reception state (to the data carrier B). Writing data,
Data carrier for switching the reading of data from B) receiving switching unit (W / R CONTROL) 3 and the transmission (carrier signal in accordance with transmission data supplied from the IF unit a ₂ to be described later data write) at ( An ASK modulator (ASK) that applies ASK modulation to the output of the output adjustment unit 2)
MOD) 4, an antenna (ANT) 5 for transmitting the modulated signal of the ASK modulator 4 and receiving the return wave from the data carrier B, and an input via the output adjusting unit 2 at the time of reception (reading of data). The transmitted carrier signal is sent to the antenna 5
And a mixer 7 that mixes the demultiplexed signals of the respective demultiplexers 6 with each other and outputs the demultiplexed return signal from the data carrier B received by the antenna 5. I am doing it.

The output adjusting section 2 is, as shown in FIG.
It is composed of an attenuator (RF ATT) 2a and an amplifier 2b and has a function of stabilizing the output level of the oscillator 1 by feedback control. The demultiplexer 6 outputs the carrier signal input through the transmission / reception switching unit 3 to the antenna 5 at the time of reception (data reading), and branches the reception signal received by the antenna 5 into two systems and outputs it. The hybrid branching device (HYB) 6a and distributors (DIV) 6b ₁ and 6b ₂ for further distributing the respective outputs of the reception signals branched by the hybrid branching device 6a.

The mixer 7 includes the distributors 6b ₁ and 6b _{2 respectively.}
Mixer 7a for mixing the distributed outputs distributed by
₁ and the output of the distributor 6b ₂ by 90 °.
0 °) 7b, the second mixer 7a ₂ for mixing the output of the phase shifter 7b and the output of the distributor 6b ₁ , and the outputs of the respective mixers 7a ₁ , 7a ₂ to the IF unit a ₂ . It is composed of buffers (BUFF) 7c ₁ and 7c ₂ .

The IF unit a ₂ is, as shown in FIG.
Interface 1 for communication with controller C
1 and switching control between a transmission state in which the RF unit a ₁ transmits data to the data carrier B and a reception state in which the data of the data carrier B is received under the control of the controller C via the interface 11. A transmission / reception control unit 12 and an amplification detection unit 8 for amplifying and detecting the outputs of the buffers 7c ₁ and 7c ₂ which are the outputs of the RF unit a _1.
A combining unit 9 for combining the respective detection outputs of the amplification detecting unit 8, an FSK demodulator (FSK DEMOD) 10 for demodulating the output of the combining unit 9 into data, and a power supply supplied via the controller C ( DC24V) to RF unit a
Power supply circuit (DC / DC) that creates power for each part including ₁
CONVERT) 13 and the like.

The amplification detection unit 8, as shown in FIG. 3, the buffer 7c _1, 7c amplification detection unit 8 ₁ that amplifies detection of the respective outputs of the _2, consists of 8 _2, amplification detection unit 8 ₁ each, 8 ₂
Is a bandpass filter (BPF) 8a and an amplifier circuit 8
b, 8c, an AGC circuit 8d, and a detection circuit 8e. The combiner 9 adds the outputs of the respective amplification detectors 8 ₁ and 8 ₂ , an adder 9 a, an amplifier circuit 9 b that amplifies the added output of the adder 9 a, and a waveform shaping of the output of the amplifier circuit 9 b. And a waveform shaping circuit (Schmitt trigger circuit) 9c.

The interface 11 is RS-4.
It is configured by using a driver / receiver conforming to the 22 standard, performs data transmission with the CPU of the controller C, and has a TTL signal conversion function. Transmission / reception control unit 1
2 is an FSK modulator (FSK) that FSK-modulates the data supplied from the controller C via the interface 11.
SK MOD) 12a, and this FSK modulator 12a is provided with a function of performing switching control of the transmission / reception switching unit 3.

The data carrier B, as shown in FIG.
RF unit b₁, IF unit b ₂, And microcomputer
Knit (hereinafter abbreviated as MICOM unit) b₃To
Broadly divided. RF unit b₁As shown in FIG.
Antenna 21 for receiving the transmission wave from read / write A
And a detector for detecting the reception output of the antenna 21 (DE
T) 22, an amplifier circuit 23 for amplifying the detection output, and a data
The unmodulated signal transmitted from the read / write A when reading
The transmitted wave is sent to the IF unit b₂Reply data given by
Phase modulator (PSK MOD) 24 for PSK modulation with
It is composed of. This RF unit b₁Phase modulator 2
No. 4 receives an unmodulated transmission signal at the antenna 21.
The IF unit b₂From
Antenna 2 is applied with phase modulation according to the returned signal.
It is a so-called reflective type that sends a reply signal from 1.
That is, so-called BPSK modulation is performed.

The MICOM unit b ₃ is, as shown in FIG. 2, a microcomputer (MICRO COMPU).
TER) 25 and a memory (RAM) 2 for storing data
6, and an FSK demodulator 27 for FSK demodulating the received signal,
An FSK modulator 28 that FSK-modulates the return data, and a battery (BAT) that supplies power to each part of the data carrier B.
T) 29.

Here, the FSK demodulator 27 and the FSK demodulator 28 are integrally configured as an FSK modulator / demodulator (FSK MOD DEMOD) 30 as shown in FIG. 3, and the FSK modulator / demodulator 30 is a MICOM. Unit b ₃
A control unit for controlling the operation of each of the units b ₁ and b ₂ other than the above is integrally incorporated. The IF unit b ₂ is an ASK modulator (ASK MOD) that further ASK-modulates the FSK-modulated return data supplied from the FSK modulator / demodulator 30.
It is composed of 31.

The operation of the mobile communication system of this embodiment will be described below. First, when data is transmitted from the reader / writer A to the data carrier B (writing of data), FS is performed in response to an instruction from the controller C.
The K demodulator 12 a controls the transmission / reception switching unit 3 so that the output of the oscillator 1 is output to the ASK modulator 4. At this time,
The ASK modulator 4 is provided with transmission data obtained by FSK-modulating the data received from the controller C via the interface 11 with the FSK modulator 12a, and the transmission data is ASK-modulated and transmitted from the antenna 5.

When the transmission wave from the read / write A is received by the antenna 21 of the data carrier B, the reception output of the antenna 21 of the data carrier B is detected by the wave detector 22 and amplified by the amplifier 23. The obtained FS
The K signal is demodulated by the FSK modulator / demodulator 30 to obtain data.
This data is stored in the memory 26 in the microcomputer 25.
Write in. In this case, the data carrier B executes the process according to the data, that is, the instruction from the read / write A described above.

Next, when data is transmitted from the data carrier B to the read / write A, that is, when the read / write A reads the data of the data carrier B,
The FSK demodulator 12a according to the instruction from the controller C
Controls the transmission / reception switching unit 3 to output the output of the oscillator 1 to the hybrid branching device 6a. At this time, the output of the oscillator 1 input to the hybrid branching device 6a is transmitted from the antenna 5. That is, in this case, the antenna 5
A non-modulated transmission wave is emitted from.

When the unmodulated transmission wave is received by the antenna 21 of the data carrier B, the phase modulator 24 performs phase modulation according to the return data given from the ASK modulator 31, and the antenna 21 transfers to the lead writer A. The reply data is sent back. Here, the reply data provided from the ASK modulator 31 is created by the processing of the microcomputer 25, FSK-modulated by the FSK modulator / demodulator 30, and ASK-modulated by the ASK modulator 31.

In the read writer A which receives the return wave at the antenna 5, the received signal is branched into two systems by the hybrid branching device 6a, and the branching outputs are further distributed by the distributors 6b ₁ and 6b ₂ . Then, the respective distributors 6b ₁ and 6
One of the distributed outputs of b ₂ is mixed by the mixer 7 a ₁ , and the other of the distributed outputs of the distributor 6 b ₂ is mixed by the phase shifter 7 b.
At 90 °, and the mixer 7b ₂ mixes it with the other distributed output of the distributor 6b ₁ . Then, the respective mixers 7a ₁ and 7a
The output of a ₂ is amplified and detected by the amplification detection units 8 ₁ and 8 ₂ , and the output is added by the adder 9a to demodulate into an FSK signal. This demodulated output is further demodulated by the FSK demodulator 10 to obtain data. The data is sent to the controller C via the interface 11.

In the case of this embodiment, the transmission from the lead writer A to the data carrier B is performed with right-handed circular polarization, and the reply from the data carrier B to the lead writer A is provided with left-handed circular polarization. The reliability of data transmission is improved by reducing the risk of interference. The features of the present invention will be described below. In this embodiment, as shown in FIG.
Connection terminals T ₁ and T ₂ for connecting a data setting device (not shown) for reading and writing data are provided on the data carrier B, and an interface 32 for performing data communication with the data setting device is provided on the data carrier B. Data transmission by a so-called wired system is performed between the data carrier B and the data setting device via the interface 32. Here, the interface 3
As 2, there may be used one that conforms to a standard such as RS232C or RS422.

The receiving section 40 in FIG. 1 comprises the detector 22, the amplifier circuit 23, and the FSK demodulator 27 in FIG. 2, and the return section 41 includes the phase modulator 24 and AS.
It comprises a K modulator 31 and an FSK modulator 28. The microcomputer 25 of the data carrier B in FIG. 1 has a serial input / output port R for inputting data.
Only one XD and one TXD are provided.

Therefore, in this embodiment, the output of the interface 32 on the data carrier B side is output via the OR gate 33 together with the output of the receiving section 40 to the serial input port RXD.
It is designed to be imported from. The serial output port TXD is directly connected to the input on the data carrier B side of the interface 32, and the reply data is output to both the reply unit 41 and the interface 32.

By thus connecting the data setting device to the data carrier B side so that the data can be confirmed and changed, the data can be confirmed and changed without using the read / write A. In addition, when data is exchanged with the read / write A, the data setting device can be used, and the read / write A is not required to be mounted on the moving body side, so that the system configuration is not complicated. In addition, if the data setting device enables data exchange as described above, and if it is a method of modulating and reflecting an unmodulated transmission radio wave from the read / write A as in the above-mentioned data carrier B, the data carrier B itself is Since it does not radiate radio waves, there is also an advantage that the radio wave law is not applied to the data carrier B side.

In the above case, the microcomputer 25 has one serial input / output port RX.
Although the description has been made for the case where only D and TXD are provided, as shown in FIG.
If the TXD is provided separately, its input / output port RX
The interface 32 may be connected to D (2) and TXD (2). In addition, in FIG.
RXD I / O port for data communication with
(1) and TXD (1). In this case, there is an advantage that both the call on the wireless side and the call on the wired side can be simultaneously answered.

Further, as shown in FIG. 6, it is also possible to use the general-purpose input / output ports P ₁ and P ₂ of the microcomputer 25 as input / output ports for connecting the interface 32. In this case, the microcomputer 25
It is sufficient to set up the program so that communication of start-stop synchronization can be performed on the software. Asynchronous is a start bit and a start bit before and after data,
In addition, it is a method of adding a parity bit to perform data transmission. In this case, an inexpensive computer 25 can be used as the microcomputer 25 of the data carrier B because both the wireless side call and the wired side call can be simultaneously answered and only one set of serial input / output ports is required.

In the above description, the case where the mobile communication system to which the present invention is applied uses radio waves has been described, but the present invention can also be applied to a communication system other than radio waves, for example, using light. .

[0038]

As described above, according to the first aspect of the invention, the control unit has the serial input port for inputting the transmission data from the interrogator and the serial output port for outputting the data stored in the memory to the reply unit. Connection means for connecting a data setting device for reading and writing data in a wired manner, an interface for performing data communication with the data setting device, and a logic of an output on the responder side of the interface and an output of the receiving unit. It is equipped with an OR circuit for taking the sum and inputting it to the input port of the control unit, and because the output port of the control unit is connected to the input of the responder side of the interface, data is set in the responder in a wired manner via the connecting means. The serial I / O port that connects the device and performs data transmission with the interrogator of the control unit also serves as the I / O port for data transmission between the data setting device and the control unit. And, it can perform data transmission between the data setting apparatus and the control unit via the interface, without using the interrogator, it can be performed check and change the data in the data setting apparatus.

Further, in the invention of claim 2, a first serial input port for inputting the transmission data from the interrogator, a second serial output port for outputting the data stored in the memory to the reply section, and In addition to the first serial input / output port, the control unit is provided with a second serial input / output port individually, and between the connection means for connecting the data setting device for reading and writing data by a wired method, and this data setting device. Since the input / output on the responder side of the interface is connected to the second input / output port, when the control unit individually has the serial input / output port, the interface for performing data communication is used. Used as an input / output port for data transmission between the data setting device and control unit,
Data can be transmitted between the data setting device and the control unit via the interface, and the data setting device can confirm / change the data without using an interrogator.

In the third aspect of the invention, the control section is provided with the serial input port for inputting the transmission data from the interrogator and the serial output port for outputting the data stored in the memory to the reply section, and the reading / writing of data is performed. The data setting device is provided with a connecting means for connecting the data setting device in a wired manner, and an interface for performing data communication with the data setting device,
Since the input / output on the responder side of the interface is connected to the general-purpose port of the control unit, the general-purpose port of the control unit is used as the input / output port for data transmission between the data setting device and the control unit. Data can be transmitted between the data setting device and the control unit via the interface, and the data setting device can confirm and change the data without using an interrogator.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.

FIG. 2 is a block diagram showing a circuit configuration of a mobile communication system.

FIG. 3 is a block diagram more specifically showing the circuit configuration of the above.

FIG. 4 is an explanatory diagram of a schematic system configuration of the above.

FIG. 5 is a block diagram showing the configuration of another embodiment.

FIG. 6 is a block diagram showing the configuration of still another embodiment.

FIG. 7 is a block diagram showing a configuration of a conventional example.

[Explanation of symbols]

A read / write device B data carrier T ₁ , T ₂ connection terminal 25 microcomputer 26 memory 32 interface 33 OR circuit 40 receiving section 41 reply section

Claims (3)

[Claims] 1. A transponder mounted on a mobile unit, and an interrogator for wirelessly performing data communication with the transponder. When an instruction from the interrogator is received by a receiving unit, the interrogator is stored in a memory. A responder of a mobile communication system in which stored data is read by a control unit composed of a microcomputer, and data is returned from a reply unit to an interrogator, and a serial input port for inputting transmission data from the interrogator and a memory The control unit includes a serial output port that outputs the data stored in the reply unit to the reply unit, and the data communication is performed between the connecting unit that connects the data setting device that reads and writes the data by a wired method and the data setting device. The output port of the controller is equipped with Is connected to the input on the responder side of the interface. 2. A transponder mounted on a mobile unit, and an interrogator for performing wireless data communication with the transponder, and when a command from the interrogator is received by a receiving unit, the interrogator is stored in a memory. A first serial input port which is a transponder of a mobile communication system in which stored data is read out by a control unit including a microcomputer and data is returned from an interrogator to an interrogator, the transmission data from the interrogator being input. And a second serial output port for outputting the data stored in the memory to the reply unit, and a second serial input / output port separately from the first serial I / O port, which is provided in the control unit. The data setting device is connected to the data setting device by a wired method, and the interface for performing data communication with the data setting device is provided. A transponder characterized by being connected to a second input / output port. 3. A transponder mounted on a mobile unit, and an interrogator for performing wireless data communication with the transponder, and when a command from the interrogator is received by a receiving unit, the interrogator is stored in a memory. A responder of a mobile communication system in which stored data is read by a control unit composed of a microcomputer, and data is returned from a reply unit to an interrogator, and a serial input port for inputting transmission data from the interrogator and a memory The control unit includes a serial output port that outputs the data stored in the reply unit to the reply unit, and the data communication is performed between the connecting unit that connects the data setting device that reads and writes the data by a wired method and the data setting device. With an interface to do,
A transponder characterized in that the input / output on the transponder side of the interface is connected to a general-purpose port of the control unit.