JP3708395B2 - Non-contact data transmission / reception system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a non-contact data transmission / reception system for transmitting and receiving data in a non-contact manner between an interrogator provided on the locker side and a responder carried by the user, for example, and locking and unlocking a locker door.
[0002]
[Prior art]
FIG. 7 is a block diagram showing the configuration of a conventional interrogator, and this interrogator is provided at the door of each storage chamber of a locker having a large number of storage chambers. In the figure, the interrogator 101 includes a main control device 110, a transmission device 120, and a reception device 130. 102 is an antenna, 103 is a responder corresponding to the interrogator 101, this responder 103 is a coil that receives a radio wave from the antenna 102 and induces a voltage, and a transmitter that transmits its own ID data by this induced voltage Etc. are built-in. Reference numeral 104 denotes a host device such as a personal computer connected to the interrogator 101 via the transmission network 105.
[0003]
The main controller 110 includes a memory 111, a communication circuit 112 connected to the transmission network 105, and a data control / arithmetic circuit 113. The transmission device 120 includes a data modulation circuit 121, a power amplification circuit 122, and a high frequency circuit 123, and the reception device 130 includes a high frequency circuit 123 and a data demodulation circuit 131. The antenna 102 is connected to the high frequency circuit 123.
[0004]
Next, the operation will be described.
Transmission data from the main controller 110 of the interrogator 101 is transmitted from the antenna 102 to the responder 103 in a non-contact manner from the data modulation circuit 121 in the transmission device 120 via the power amplification circuit 122 and the high frequency circuit 123. . The responder 103 that has received the transmission data induces a voltage by a built-in coil, and transmits its own ID data from the built-in transmission device using the induced voltage.
[0005]
On the other hand, the interrogator 101 supplies the ID data from the responder 103 received by the antenna 102 to the data demodulation circuit 131 via the high frequency circuit 123 and demodulates it, and then the data control / arithmetic circuit 113 of the main controller 110. Then, the data is controlled / calculated, and the control / calculation result is stored in the memory 111. In addition, the control / calculation result in the data control / arithmetic circuit 113 is transmitted to the host device 104 via the communication circuit 112. The host device 104 receives the supplied data, compares it with the ID data it has, and locks or unlocks the locker door when they match.
[0006]
[Problems to be solved by the invention]
Since the conventional contactless data transmission / reception system is configured as described above, the interrogator antenna and the responder must be arranged in a one-to-one relationship. Therefore, when an interrogator is provided on the doors of a plurality of storage rooms of a locker, a space is required for securing a place for installing a plurality of interrogators corresponding to the responder on a one-to-one basis. With the installation of the interrogator, there were problems such as securing a power source and increasing power consumption.
[0007]
The present invention has been made to solve the above-described problems, and an object of the present invention is to obtain a contactless data transmission / reception system that realizes space saving and facility cost reduction.
[0008]
[Means for Solving the Problems]
The non-contact data transmission / reception system according to the present invention is a non-contact data transmission / reception system including an interrogator that performs non-contact data transmission / reception with a plurality of responders, wherein the interrogator includes a plurality of antennas corresponding to the responders. , An antenna switching circuit for sequentially selecting the antennas, a transmission device for supplying a transmission signal to the selected antenna, a reception device for inputting a reception signal of the selected antenna, and controlling the transmission device to receive the reception And a main control device that stores a received signal of the device in a memory and controls the switching of the antenna switching circuit.
[0009]
In the antenna switching circuit of the non-contact data transmission / reception system according to the present invention, the antenna switching circuit connects the selected antenna to the transmitting device and the receiving device and does not connect the other antennas.
[0010]
In the non-contact data transmission / reception system according to the present invention, the antenna is a loop antenna.
[0011]
The antenna of the non-contact data transmission / reception system according to the present invention is constituted by a resonance circuit of a combination of an inductance, a capacitor and a resistance.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described below.
Embodiment 1 FIG.
FIG. 1 shows an overall configuration diagram of a non-contact data transmission / reception system according to Embodiment 1 of the present invention. In FIG. 1, reference numeral 1 denotes an interrogator provided for each locker having a large number of storage rooms. 2-n is an antenna provided in each of the storage room doors, and 3-1 to 3-n are responders (see FIG. 2) corresponding to the antennas 2-1 to 2-n. 3-n incorporates a coil that receives a radio wave from the antennas 2-1 to 2-n and induces a voltage, and a transmitter that transmits its own ID data by the induced voltage. Reference numeral 4 denotes a host device such as a personal computer connected to the interrogator 1 via the transmission network 5.
[0013]
FIG. 2 is a block diagram showing the configuration of the interrogator 1. In the figure, an antenna switching circuit for selectively operating one of the main controller 10, the transmitter 20, the receiver 30, and the antennas 2-1 to 2-n. 40. The main controller 10 includes a memory 11, a communication circuit 12 connected to the host device 4 via a transmission network 5, and a data control / arithmetic circuit 13.
[0014]
The transmission device 20 includes a data modulation circuit 21, a power amplification circuit 22, and a high frequency circuit 23, and the reception device 30 includes a high frequency circuit 23 and a data demodulation circuit 31. The high frequency circuit 23 is connected to the common terminal (not shown) side of the antenna switching circuit 40, and the antennas 2-1 to 2-n are connected to the plurality of switching terminal (not shown) sides, respectively.
[0015]
As the antennas 2-1 to 2-n, a loop antenna shown in FIG. 3 or an antenna composed of a resonance circuit combining a capacitor C, an inductance L, and a resistance R shown in FIG. 4 is used.
[0016]
Next, the operation will be described.
In FIG. 5, the main controller 10 of the interrogator 1 switches the antenna switching circuit 40 to sequentially select the antennas 2-1 to 2-n, and the antennas 2-1 to 2-n and the responders 3-1 to 3-3. It is the figure which showed communication operation with -n with progress of time.
[0017]
First, in the interrogator 1, the main control device 10 controls the transmission device 20 to supply transmission data to the antenna switching circuit 40. In this state, the main control device 10 switches the antenna switching circuit 40 and the antenna 2-1. ˜2-n are sequentially selected, and the transmission data is emitted as radio waves from the selected antenna.
[0018]
In this state, when a person having one of the responders 3-1 to 3-n approaches the locker, the radio wave acts on the coil in the responder to induce a voltage in the coil. To actuate the transmitter to transmit the ID data specified to itself.
[0019]
On the other hand, the interrogator 1 receives the ID data by the selected antenna, demodulates the ID data by the data demodulating circuit 31 via the high frequency circuit 23, and then the data by the data control / arithmetic circuit 13 of the main controller 10. The control / calculation is performed, and the control / calculation result is stored in the memory 11. The control / calculation result is transmitted to the host device 4 via the transmission network 5. The host device 4 receives the supplied ID data, collates it with previously held ID data, and locks or unlocks the locker door when they match. The same thing may be performed by the interrogator 1 itself.
[0020]
The antenna selected by the antenna switching circuit 40 is connected to the transmitting device 20 and the receiving device 30, but other antennas not selected by the antenna switching circuit 40 are connected to the transmitting device 20 and the receiving device 30. Not inactive.
[0021]
The order of switching the antennas 2-1 to 2-n (the order in which the antennas are selected) is, as shown in FIG. 6, several orders, for example: (1) Ascending order of antenna addresses (2) Ascending order of odd numbers of antenna addresses Then, the ascending order of even numbers (3) the descending order of antenna addresses (4) the ascending order of even numbers of antenna addresses and the ascending order of odd numbers after that are stored in the memory 21 in the main controller 12, and in which order the antennas 2-1 to 2 Select in advance whether to switch -n.
[0022]
【The invention's effect】
As described above, according to the present invention, the interrogator is provided with at least one antenna, and the one antenna is selected by the antenna switching circuit and is electrically connected to the transmission device and the reception device. Therefore, it is only necessary to secure an interrogator as much as possible to install one interrogator, so that space saving can be realized. Moreover, since it is not necessary to install an interrogator corresponding to each of a plurality of responders, there is an effect that it is possible to reduce the cost of equipment.
[0023]
In addition, according to the present invention, the antenna selected by the antenna switching circuit is connected to the transmitting device and the receiving device, and the other antennas are not connected, so the communication with the responder is performed one-to-one. . As a result, since it is possible to communicate with the responder without interfering with adjacent antennas, there is an effect that communication with the responder is ensured and high reliability can be obtained.
[0024]
Furthermore, according to the present invention, the antenna is constituted by a loop antenna or a resonance circuit of a combination of an inductance, a capacitor, and a resistor, so that the wiring of the antenna can be simplified and the man-hours for installation can be reduced. There is an effect that can.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a contactless data transmission / reception system according to Embodiment 1 of the present invention;
FIG. 2 is a block diagram showing a configuration of an interrogator in the non-contact data transmission / reception system.
FIG. 3 is a perspective view showing a loop antenna.
FIG. 4 is a resonance circuit diagram constituting the antenna.
FIG. 5 is a diagram showing processing for a plurality of antennas by a main controller of the interrogator as time passes.
FIG. 6 is an explanatory diagram showing an antenna switching order.
FIG. 7 is a configuration diagram of a conventional non-contact data transmission / reception system.
[Explanation of symbols]
1 Interrogator 2-1 to 2-n Antenna 3-1 to 3-n Responder 4 Host device 5 Transmission network 10 Main controller 11 Memory 12 Communication circuit 13 Data control / arithmetic circuit 20 Transmitter 21 Data modulation circuit 22 Power Amplifier circuit 23 High-frequency circuit 30 Receiver 31 Data demodulator 101 Interrogator 102 Antenna 103 Responder 104 Host device 110 Main controller 111 Memory 112 Communication circuit 113 Data control / arithmetic circuit 120 Transmitter 121 Data modulator 122 Power amplifier 123 High-frequency circuit 130 Receiver 131 Data demodulation circuit

Claims (4)

In a non-contact data transmission / reception system including an interrogator that performs non-contact data transmission / reception with a plurality of transponders, the interrogator includes a plurality of antennas corresponding to the transponders, and an antenna switching circuit that sequentially selects the antennas. A transmission device that supplies a transmission signal to a selected antenna; a reception device that inputs a reception signal of the selected antenna; a control device that controls the transmission device; stores a reception signal of the reception device in a memory; and A non-contact data transmission / reception system comprising: a main control device for controlling the order of switching the antenna switching circuit. 2. The non-contact data transmission / reception system according to claim 1, wherein the antenna switching circuit connects the selected antenna to the transmission device and the reception device and does not connect other antennas. The non-contact data transmission / reception system according to claim 1, wherein the antenna is a loop antenna. 2. The non-contact data transmission / reception system according to claim 1, wherein the antenna is constituted by a resonance circuit of a combination of an inductance, a capacitor, and a resistance.

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