JPH0815265B2 - Non-contact type response unit - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a non-contact type response unit such as a transponder mounted and used in a mobile machine or the like in an automatic production line.

(Summary of the Invention) A non-contact type response unit of the present invention is electromagnetically coupled with a communication partner to receive power from the communication partner based on a high frequency signal for power supply, and uses this power as an operating power source for the high frequency signal. It has a function of taking out the write data and the write position designation information superimposed on it from the communication unit and storing the write data and the write position designation information in the nonvolatile storage means. It has a function of returning to the other party.

(Prior art and its problems) In an automatic production line, a mobile machine equipped with a tool is moved to a predetermined position based on a command signal from a stationary machine, and the mobile machine performs a predetermined work with the tool at that position. It has become. The command signal from the fixed device to the mobile device is transmitted by receiving the command signal from the transmitter antenna of the fixed device at the antenna of the transponder of the mobile device. The wiring between and is simplified to simplify the configuration and allow the mobile unit to operate more freely.

However, in the case of such a conventional example, the wiring for supplying the operating power of the transponder of the mobile device is required, and the configuration becomes complicated and the assembly is troublesome.

(Object of the Invention) An object of the present invention is to provide a non-contact type response unit whose operating power is given by transmission from a transmission partner and has a simple structure.

Another object of the present invention is to provide a non-contact type response unit in which the data received and written from the transmission partner and the writing position designation information can be sent back by feedback so that the transmission partner can confirm the transmission.

(Structure and Effect of the Invention) Electromagnetic induction coupling is performed with a communication partner that transmits an electromagnetic wave for power supply on which write data and write position specification information are superimposed, and electric power is received based on a transmission signal from the communication partner, and this reception is performed. A non-contact type response unit that operates using the electric power as an operating power source, which is generated from the antenna coil that is electromagnetically inductively coupled by the transmission signal from the communication partner and the antenna coil according to the transmission signal from the communication partner that is electromagnetically coupled. A power receiving unit for converting the AC output into electric power, a demodulating unit for taking out the write data and the write position designation information from the transmission signal from the communication partner by using the power converted by the power receiving unit as the operating power, and the demodulating unit. Designated by non-volatile storage means for recording the extracted write data and write position specification information extracted by the demodulation means Control means for writing the write data to the address of the storage means, and reading the write data written in the storage means after writing the data in the storage means, modulating the modulated data to the communication partner side from the antenna coil. It is characterized in that it is provided with a transmitting means for returning and transmitting.

The non-contact type response unit of the present invention receives electric power based on a transmission signal transmitted from a communication partner, and operates with the received electric power as an operating power source.

Furthermore, since the write data and the write position designation information transmitted from the communication partner are sent back to the communication partner, the communication partner confirms the transmission.

Therefore, according to the present invention, it is possible to obtain the non-contact type response unit having a simple structure in which the wiring for supplying the operating power is omitted. Especially, data for writing and power are 1
Since it is received by one antenna coil, it is possible to downsize the device and reduce the cost.

Further, a highly reliable non-contact type response unit capable of confirming the transmission on the communication partner side can be obtained. In the non-contact type response unit of the present invention, the power supply is performed by the electromagnetic wave for power supply on which the write data from the communication partner and the write position designation information are superimposed as described above. May not be performed stably, and in that case, writing of data to the memory may not be performed correctly. Therefore, it is very effective that the non-contact type response unit of the present invention has the feedback transmission function and the transmission partner side can confirm the transmission.

(Description of Embodiments) Hereinafter, the present invention will be described in detail based on embodiments illustrated in the drawings. In this embodiment, the transponder B is used as the non-contact type response unit, and the write data and the address information for designating the write position are coded when the ID code is set from the fixed machine A to the transponder B. An example is given as a signal. FIG. 1 is a circuit block diagram of the stationary machine A. The stationary machine A is fixedly installed on a side of a predetermined position on the tool movement path of an automatic production line in an unmanned factory or the like. In FIG.
Reference numeral 1 denotes a first antenna coil, and the first antenna coil 1 is provided with a power supply unit 2 for performing code setting and power supply.
And the receiving unit 3 are connected via a coupling circuit 4.

The power supply unit 2 includes an oscillator circuit (OSC) 5 for generating a high frequency signal, a code setting unit 6 for setting a specific code signal having an address section and a data section, and a modulation circuit for modulating the code signal. 7 and an amplifier circuit 8 for amplifying a high frequency signal on which a code signal is superimposed. The code setting circuit 6 corresponds to the setting means in the claims, and the modulating circuit 7 and the amplifying circuit 8 correspond to the transmitting means.

The receiving unit 3 includes an amplification circuit 9, a demodulation circuit 10, a serial-parallel conversion circuit (SPC) 11, and a matching circuit 1 as a matching means.
It has 2 and. The amplification circuit 9 and the demodulation circuit 10 described above.
Corresponds to the demodulation means in the claims.

The code signal from the code setting unit 6 is input to the matching circuit 12, and the code signal is compared with the code signal transmitted from the transponder B side described later,
You can check whether the code signal is set correctly.

FIG. 2 is a circuit block diagram of a transponder B as a non-contact type response unit according to the embodiment of the present invention.
Although not shown, the transponder B is equipped with a tool and is integrally configured as a mobile device. In FIG. 2, 13 is a second antenna coil that is coupled to the first antenna coil 1 by electromagnetic induction. The second antenna coil 13 includes a power receiving unit 14 and a code signal setting receiving unit 15. The transmission unit 16 as a transmission unit is connected via a switching circuit 17. The power receiving unit 14 and the transmitting unit 16 are connected via a switch circuit 18. The switching circuit 17 and the switching circuit 18 are switching-controlled by the timing control circuit 19. An EPROM 20 is connected to the timing control circuit 19 as a storage means for writing a code signal and setting a code. The timing control circuit 19 also functions as control means for controlling data writing to the EPROM 20, and the storage means is not limited to the EPROM 20 and may be a PROM.
Various modifications such as are possible.

The power receiving unit 14 is provided with a rectifier circuit 21 that converts the AC output from the second antenna coil 13 into DC, and a capacitor 22 that stores the DC charge.

The code signal setting receiver 15 includes an amplifier circuit 23 and a demodulator circuit 24 as a demodulator.

The transmitter 16 includes a modulation circuit 25 and an amplification circuit 26 as a modulation means.

Although not shown, the fixed machine A and the transponder B
Both are covered with a case made of a material such as brass or copper to protect them from oil and dust.
Then, the first antenna coil 1 and the second antenna coil 13
And are magnetically coupled by approaching, for example, about 5 mm.

FIG. 3 is a circuit diagram showing in detail the periphery of the switching circuit 17, the rectifying circuit 21, and the switching circuit 18. In this figure, 27 is a resonance capacitor for resonating with the second antenna coil 13. . In this configuration, the switching circuit 17 and the switching circuit 18 are controlled by the timing control circuit 19, the switching circuit 17 is switched, and the rectifying circuit 21 and the code signal setting receiving unit 15 are connected to the second antenna coil 13. At the same time, the switch circuit 18 is opened, and in that state, electric charge is accumulated in the capacitor 22. At this time, basically, the accumulated charges do not flow out to the outside except the leakage current from the rectifier circuit 21 and self-discharge unless the switch circuit 18 is closed. On the other hand, by switching the switching circuit 17, the transmission unit 16 is connected to the second antenna coil 13 and the switching circuit 18 is closed so that a predetermined code signal can be transmitted by using the charge accumulated in the capacitor 22 as an operating power source. It has become.

Next, the operation of this embodiment will be described with reference to the time chart of FIG.

The code setting unit 6 is added to the high frequency signal generated by the oscillation circuit 5.
The specific code signal having the address portion and the data portion as shown in b set in b is superimposed and modulated to obtain the signal as shown in a, and the high frequency signal a is set by the control means (not shown) for a set time. It is supplied to the first antenna coil 1 every other time and the first antenna coil 1 is excited. In the first antenna coil 1, a magnetic field corresponding to the above-mentioned high frequency signal a is generated, the second antenna coil 13 is electromagnetically coupled by this magnetic field, and the second antenna coil 13 is electromagnetically induced by the magnetic field.
An AC output as shown in 13 to c is generated. This AC output c is converted into DC by the rectifier circuit 21 via the switching circuit 17, and a rectified output as shown in d is output.

The rectified output d is supplied to the capacitor 22, and the DC charge is stored in the capacitor 22. Further, the AC output c from the second antenna coil 13 is amplified by the amplifier circuit 23 and demodulated by the demodulator circuit 24 into the original code signal as indicated by e. When the accumulated charge amount of the capacitor 22 exceeds a predetermined threshold level L, the timing control circuit 19 outputs a read / write signal (R / W signal) to the EPROM 20 as shown in f, and based on the code signal, EPR
Write the specified data to the specified address of OM20. The timing control circuit 19 outputs a timer output to each of the switching circuit 17 and the switching circuit 18 after a predetermined time elapses, switches the switching circuit 17 to connect the transmitting unit 16 to the second antenna coil 13, and 18 is switched to supply the electric charge accumulated in the capacitor 22 to the transmitter 16,
Using this as the operating power source, as shown in h, the EPROM20
The code signal written in is read and input to the modulation circuit 25, and the modulated signal g is amplified by the amplification circuit 26 and supplied to the second antenna coil 13 to excite the second antenna coil 13.

The second antenna coil 13 generates a magnetic field according to the above-mentioned modulated signal g, and this magnetic field causes the first antenna coil 1 to move.
Are electromagnetically coupled, and a signal corresponding to the modulated signal g is generated from the first antenna coil 1 by the electromagnetic induction.
This signal is amplified by the amplification circuit 9, demodulated by the demodulation circuit 10 and converted into a parallel signal by the serial-parallel conversion circuit 11, and then compared by the collation circuit 12 with the code signal set by the code setting section 6 to determine a predetermined value. It is confirmed whether the code signal of is written in the EPROM 20. The transmission of the code signal from the transponder B to the fixed device A is set to be performed in a time zone corresponding to the non-transmission of the high frequency signal from the fixed device A to the transponder B.

In each of the transponders B to which the specific code signal is written in this way, a tool is provided, and the transponder B with the tool is placed in a predetermined transport path,
By reading the code signal of the transponder B sequentially conveyed by the code signal reading device separately provided (or also used as the stationary machine A), what is the tool provided in the transponder B? It is determined whether or not there is, and based on the result of the determination, a predetermined tool is selected and held in the holder to perform a predetermined machining operation.

The first and second antenna coils 1 and 13 are not limited to the ferrite coils shown in the drawing, but loop coils may be used.

In the above embodiment, the stationary machine A is used as the code setting means, but the present invention may be configured such that a large number of transponders B are arranged and the code setting means is moved with respect to the transponders. . In the above embodiment, the write data and the address information for designating the write are given as an example of the code signal when the ID code is set from the fixed device A to the transponder B. It goes without saying that it can be applied as address information for designating a writing position. Further, as the non-contact type response unit, an IC card can be used in addition to the transponder in the above-described embodiment, and various applications of the non-contact type response unit are conceivable. In that case, the stationary device A serves as an IC card data reading device.

[Brief description of drawings]

FIG. 1 is a circuit block diagram of a stationary machine according to an embodiment of the present invention,
FIG. 2 is a circuit block diagram of the transponder, FIG. 3 is a circuit diagram of essential parts, and FIG. 4 is a time chart for explaining the operation. 1 ... First antenna coil, 5 ... Oscillation circuit, 6 ... Code setting section, 13 ... Second antenna coil, 20 ... EPROM as memory, 21 ... Rectifier circuit, 22 ... Capacitor, 2
4 ... Demodulation circuit, 25 ... Modulation circuit, A ... Stationary device, B ...
…transponder.

Claims (1)

[Claims] 1. An electromagnetic induction coupling with a communication partner that transmits an electromagnetic wave for power supply on which write data and write position designation information are superimposed, receives power based on a transmission signal from the communication partner, and receives the received power. A non-contact type response unit that operates by using as an operating power source, an antenna coil that is electromagnetically inductively coupled by a transmission signal from a communication partner, and an alternating current generated from the antenna coil according to a transmission signal from the communication partner that is electromagnetically coupled. An electric power receiving unit for converting the output into electric power, a demodulating unit for taking out the write data and the write position specifying information from the transmission signal from the communication partner by using the electric power converted by the electric power receiving unit as the operating power, and the demodulating unit Specified by the writing position specification information extracted by the non-volatile storage means and the demodulation means. Control means for writing the write data to the address of the storage means, and reading the write data written in the storage means after writing the data in the storage means, modulating it, and transmitting the feedback from the antenna coil to the communication partner side. A non-contact type response unit, comprising: