JPH0222998A - Remote operating device - Google Patents

Abstract

PURPOSE:To make an internal power source unnecessary and to improve convenience by converting electromagnetic energy to a power by receiving an electromagnetic wave having a predetermined frequency radiated from a sensor that is a transmission means, and performing an operation by the power. CONSTITUTION:When a person P holding an identification card 20 that is a remote operating device on the pocket part of a jacket, etc., as a passport stands in the electromagnetic wave M issued to a range of 1.5m square from the panel shaped sensor 10 provided on the wall 2a of a passage outside a room 2, the card 20 generates a current on an LC parallel resonance circuit 22 by the electromagnetic wave. An identification code number set in a storage means such as a ROM27a, etc., is issued by, for example, radio frequency- modulated setting the current as a power source. In such a way, it is possible to make the internal power source such as a battery, etc., unnecessary and to improve the convenience.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a remote actuating device that operates by being supplied with power from a transmitting means without contact.

2. Description of the Related Art An identification device is used that uses a widely spread magnetic card to write information for identifying an individual, and reads the information with a reader to identify the individual holding the magnetic card. On the other hand, there is no need to take out the card, the card and the reading device are configured without contact, so there is no mechanical damage or trouble, and it is difficult to duplicate the memory contents of the card, resulting in increased reliability. Contactless identification devices with high characteristics are also used. In this conventional contactless identification device, the card used is equipped with means for generating an identification signal such as a numerical code used for identification, and means for transmitting an identification signal, and the power source is an internal power source such as a lithium battery. was incorporated.

Problems to be Solved by the Invention Therefore, if the identification signal is constantly being transmitted, the battery will run out and the card will have a lifespan of, say, one year. or forgetting to cut it, making it difficult to handle.
This has had problems such as the above-mentioned convenience compared to magnetic cards is reduced by half.

An object of the present invention is to provide a remote actuation device that solves the above-mentioned technical problems, eliminates the need for an internal power source such as a battery, and allows desired operations to be performed remotely. .

Means for Solving the Problems The present invention is characterized in that it receives electromagnetic waves having a predetermined frequency emitted from a transmitting means, converts the electromagnetic energy into electric power, and operates using the electric power. It is a remote actuation device.

Further, in the present invention, the remote actuating device includes a resonant means having the above-mentioned frequency as a resonant frequency, a smoothing means for smoothing the output of the resonant means and outputting DC power, and a signal generating means energized by the output of the smoothing means. , and transmitting means for converting the output of the signal generating means into electromagnetic waves and transmitting the electromagnetic waves.

Further, in the present invention, the transmitting means may have a modulating means that uses the above frequency as a carrier wave frequency and modulates the transmitted data with the carrier wave, and the remote operating device may include a demodulating means that demodulates the transmitted data.

Operation In the remote actuation device according to the present invention, electromagnetic waves having a predetermined frequency emitted from the transmitting means are received and the electromagnetic energy is converted into electric power. The remote actuating device operates using the electric power, so that the remote actuating device does not require an internal power source such as a battery, and does not require maintenance work such as battery replacement, which greatly improves convenience. Furthermore, if an internal power source such as a battery is provided, the lifespan of the remote operating device may be shortened due to battery expiration, or internal damage may occur.
The present invention prevents such a situation.

Further, according to the present invention, the remote actuating device may be provided with a resonance means, a smoothing means, a signal generating means, and a transmitting means. In this case, the signal generated by the signal generating means may be If the mode is different for each remote actuating device, the transmitting means can mutually identify a plurality of remote actuating devices by receiving a signal transmitted from the remote actuating device.

Further, the data transmitted from the transmitting means is modulated by the modulating means, and demodulated into data by the demodulating means of the remote operating device. In this way, it is possible to perform complex data transmission.

EXAMPLES Below, examples of the present invention will be described in detail with reference to the drawings.

3rd (2I) is a system diagram of a configuration according to an embodiment of the present invention, and FIGS. 4 to 7 are perspective views showing application examples. A panel-shaped sensor 10, which is a transmitting means, is installed on the wall 2a of the corridor 3 outside the room 2, which was devised to control the coming and going of people in the room 2. When a person P stands in the emitted electromagnetic waves M with an identification card 2゜, which is a remote activation device, attached to the bogget part of his jacket as a pass as shown in Figure 6, the card 2o will be moved by the electromagnetic waves. As will be described later, a current is generated in the LC parallel resonant circuit, and this current is used as a power source to transmit an identification code number set in a storage means such as a ROM (read-only memory) on, for example, a frequency-modulated radio wave. .

The sensor 10 receives frequency modulated radio waves from the card 2o using a receiver, decodes them, and outputs them to the control unit 30. The control unit 30 stores the data received by the sensor 10 in an external storage device 31 such as a floppy disk device as shown in FIG. 4, and prints out the data using a printer 32 as shown in FIG. Output to the main computer 40.

The main computer 40 stores the received identification code number in a byte RO mounted on the board 41, for example, 560.
A search is made to see if permission to enter the confidential A class room 2 is registered in a storage file constituted by a storage means such as M. If registered, the electric lock 7 is unlocked, the door 4 is opened by the electric motor 5, and the person carrying the card 20 storing the identification card number is allowed to enter the room.

If it is not registered, for example, the synthesized voice will be used for speaker 6.
He informs Matsu P, who is in possession of the card, that he is not allowed to enter the room.

The main computer 40 can register new cards and delete current data through input means such as the keyboard 42, and also organizes ledgers such as daily reports and weekly reports.
Furthermore, it is printed out using the printer 32. Further, various data can be displayed at any time on a display device 44 such as a CRT (cathode ray tube) as shown in FIG. The same operation is performed when leaving the room as when entering. The sensor 10 is
For example, a white acrylic plate is used as the case body 11, and a painting or the like can be attached to the front as shown in FIG.

FIG. 1 is a block diagram of the internal configuration of the card 20, and FIG. 2 is a block diagram of the configuration related to the senna 10.

Referring to these drawings, the inside of the sensor 10 is supplied with DC power of, for example, 12V DC so that it can operate even in the event of a power outage with DC current from a backup battery, and has a resonant frequency of 24kHz (according to the Technical Enforcement Regulations). An oscillation/power amplifier 12 that generates an alternating current amplified to a frequency (not subject to regulations), and an L that receives the alternating current from the oscillation/power amplifier 12 and forms a magnetic field that changes in a resonant state.
C series resonant circuit 13.

There is also a superheterodyne receiver 15 and a pulse width discrimination circuit 16 that selectively receive and reproduce frequency modulated radio waves from the card 20 received by the antenna 14, and repeatedly read the selected received information for the first and second reading. a 16-BIT decoder circuit 17 that outputs an output when it matches the reading;
A 16-BIT digital output terminal L8a to the control unit 30 and a BUS that outputs the read completion signal.
It is provided with a Y1 child 18b and a 5TROBE terminal 19 for inputting a processing completion signal from the control unit.

The LC series resonant circuit 13 as an antenna consists of a coil 13a and a capacitor 13b as electromagnetic wave transmitting means. The resonant frequency fO of this resonant circuit 13 is obtained by fo=1i2yt-E (1), and the circuit impedance ZO is obtained by Zo=R''+
(a+L-1)'(&lC)'-(2
) can be obtained. However, L is the self-inductance of the coil 13a, C is the reactance of the capacitor 13b, R is the DC resistance of the circuit 13, and ω is the angular frequency.

Therefore, for example, the coil 13a of 4.4 mH and the
．． When an alternating current of 24 kHz (corresponding to a resonance frequency of 11 f o ) is supplied to the LC series resonant circuit 13 consisting of a capacitor 13 b of 01 μF, it becomes a resonant layer (ωL
−1/ωC〉 becomes O, and the impedance Z of the circuit 13
o is only the effective resistance R.

This makes it possible to transmit strong electromagnetic waves, form an electromagnetic field M that reaches farther, and efficiently input power to the LC parallel circuit 22 as an electromagnetic induction circuit of the card 20. That is, the voltage generated by the coil 13a is the product of the current flowing through the coil and the inductance of the coil, and a large voltage is generated, causing the parallel resonant circuit 22 of the card 20fl to generate a large voltage.

For example, the card 20 has a size of approximately 90 mm x 50 mm x 4 m, on which a pass 87 etc. can be attached as shown in Fig. 6.
In a thin plate-like plastic case 21 of m, there is an LC parallel circuit that receives the 24 kHz induced electromagnetic field M from the sensor 10, sets the coil inductance and capacitor capacity to a resonance state, and generates a large alternating current. A resonant circuit 22, a rectifier circuit 23 for rectifying the induced alternating current generated in the resonant circuit 22, a regulator circuit 24 for keeping the voltage of the rectified DC current constant, An oscillation circuit 25 that provides a repetition frequency, a clock pulse generation circuit 26 with a 16-pulse count section 26a, a shift register 27 that reads out the identification code number set in the ROM chip 27a, and a pulse width of 5 to 5 ms from 1 ms to 5 ms. 20 times/second 1! A 16-bit pulse width modulation circuit 28 that modulates the return cycle, and 60
FM radio wave transmitter 2 that transmits weak radio waves of ~150kHz
9. With such a configuration, the above-described operation can be realized.

In this embodiment, the sensor lO and the main computer 40 are constructed separately, but it is also possible to omit the main computer 40 and incorporate a microcomputer into the control unit 30 for compact integration.

In addition, although this embodiment describes an example in which the card 20 is applied to check entry and exit to the secret room 2, the card 20 is attached to the key of a members-only club or hotel to record the turnout time and number of visits to provide customer service. It is possible to smoothly improve and manage information, and to use it for security control and crime prevention.

Alternatively, it can be used to check baggage at airports, etc.

FIG. 8 is a block diagram of the internal configuration of the card 20a according to the second embodiment of the present invention, and FIG. 9 is a block diagram of the internal configuration of the card 20a according to the second embodiment of the present invention.
FIG. 2 is a block diagram of a configuration related to. Referring to these drawings, card 20a includes LC parallel resonant circuit 22 including loop antenna 73 and tuning capacitor 88 provided therein. The output of the resonant circuit 22 is shared by the rectifying/smoothing circuit 23 and the constant voltage generating circuit 24 as DC power. Also, as a circuit powered by this DC power, there is a ROM 27 that stores data to be transmitted.
A is provided. The parallel data read from the ROM 27a is converted into serial data by a parallel/serial converter 79 and input to the logic circuit 76. The output of the logic circuit 76 is the crystal oscillator 80 output divided by the frequency dividing circuit 81.
A desired clock signal obtained by frequency division is inputted to a modulation circuit 82, and modulated using the tarock signal as a carrier, for example, by a PWM (pulse width modulation) method. The modulation circuit 82 output is transmitted from a transmitting antenna 84 via an antenna matching device.

Inside the sensor 10a, a configuration is provided that generates an alternating current with a resonance frequency of 24 kHz. That is, a crystal oscillator 92, a frequency dividing circuit 93 that divides its output frequency into the 24 KHz, a low-frequency f-wave generator 94 that removes noise such as harmonics, and a circuit that sets its output level to an appropriate level. A power amplifier 96 and a power amplifier 98 are provided.

It also includes an LC series resonant circuit 99 that receives an alternating current from a power amplifier 98 and includes a loop antenna 8 and a loaded capacitor 9 that forms an electromagnetic field M that changes in a resonant state.
In addition, in order to selectively receive and reproduce the frequency inverted in-wave from the card 20a received by the loop antenna 33, an antenna matching device 34, a high frequency amplifier 68, and six intermediate frequency amplifiers are provided.
A demodulating low frequency amplifier 70, a waveform shaping circuit 71, a pulse width discriminator 35, and a decoder 36 are provided. The resonant frequencies fO of the nine LC series resonant circuits serving as antennas are determined in the same manner as in the first embodiment.

Even with this configuration of this embodiment, the same effects as those of the first embodiment can be achieved. Further, in this embodiment, a crystal oscillator 80 is used. In the first embodiment, if there is a large temporal change in the relative distance between the sensor 10 and the card 20, it is assumed that the card 20 may not be able to achieve the desired operation due to, for example, a deviation in reception frequency by the card 20. Ru. In this embodiment, the crystal oscillator 80 is used to generate a clock signal that defines the electrical operation of the card 20, so such a situation can be prevented.

FIG. 10 is a block diagram showing the basic configuration of a third embodiment of the present invention. In each of the embodiments described above, the cards 20,2
Card 2 sends data from 0a to sensors 10 and 10a.
The fixed data was stored in the ROM 9 provided in the card 20.20a, but in this embodiment, the data stored in the ROM 9 provided in the card 20.2
It is intended to perform mutual transmission of digital signals between a card 51 and a sensor 52 having a configuration similar to that of 0a.

The sensor 52 is provided with a transmitter/receiver 53 that transmits/receives signals with the card 51 as described later, and a controller 54 that controls the transmitter/receiver 53.
For example, commercial AC power is supplied to 2, and
A control unit 56 is connected via a data line 55.

The control unit 56 is provided with a serial/parallel converter 57 configured by, for example, a shift register or the like, which converts digital data transmitted as a serial signal on the data line 55 into a parallel signal.

Data from the serial/parallel converter 57 is provided to a microcomputer 58 including, for example, a microprocessor. Based on these data, the microcomputer 58 displays various data on the display unit 44 as described in the first embodiment, and also prints out these data on the printer 32. Further, based on various data obtained from the card 51, the opening/closing of the electric motor 8 is controlled as appropriate via the door control section 59.

FIG. 11 is a block diagram showing an example of the configuration of the sensor 52. Referring to FIG. 11, the sensor 52 includes the control section 54 which reads data from the data line 55 via the internal bus 60. As shown in FIG. Commands input to the microcomputer 58 using the keyboard 42 or the like are transmitted to the control unit 54 . The sensor 52 is also equipped with a crystal oscillator 61, the output of which is input to a frequency dividing circuit 62 realized by, for example, a phase-locked loop circuit (PLL circuit) or the like to generate a necessary frequency. The output is modulated by, for example, a pulse width modulation method (PWM method) in the modulation circuit 63 based on digital data inputted from the control section 54 via the logic circuit 64 .

The output of the modulation circuit 63 passes through a low-pass filter 65 to remove noise components, and then is sent to an attenuator 66 and a power amplifier 6.
After the signal is converted to the required output level via the antenna 7, it is transmitted from the antenna 53.

On the other hand, the radio waves received by the antenna 53 are transmitted to the control unit 5 via a high frequency amplifier 68, an intermediate frequency amplifier 69, a demodulation low frequency amplifier 70, a waveform shaping circuit 71, and a logic circuit 72.
4 is input.

FIG. 12 is a block diagram showing an example of the configuration of the card 51. As shown in FIG. Referring also to FIG. 12, the card 51 has a loop antenna 73 that performs transmission and reception with the antenna 53 of the sensor 52.
is provided. The output from the loop antenna 73 is sent to the card 5 via a rectifying and smoothing circuit 74, etc., as in the first embodiment.
1 supplies DC power. On the other hand, the output from the loop antenna 73 is input to the logic circuit 76 via the demodulation amplification circuit 75.

The card 51 is provided with a memory section 77 made of, for example, a memory element having a complementary metal oxide silicon structure (C-MO9#I structure). In the storage section 77, a predetermined address is selected according to data inputted from the program counter 78 via lines rOrl, . . . , ra.
The data stored at the address is on line co, c1.
．． ..., is output to seven registers via cb.

Such read ii control is performed by the 10
This is done by commanding the gram counter 78.

The card 51 includes a crystal oscillator 80 whose power is regulated by the DC power supply from the rectifying and smoothing circuit 74, and a frequency dividing circuit 81 which divides its output into an appropriate frequency. The output is input to the register 79 to define its operation, and is also input to the modulation circuit 82 to modulate the serial data read out from the register 79. The output of the modulation circuit 82 is input to an antenna matching circuit 83 to achieve impedance matching with the transmitting antenna 84, and then outputted by the transmitting antenna 8'4.

On the other hand, the rectifying and smoothing circuit 74 includes a switching means 8.
5 is connected, and supplies power to the logic circuit 76 and the like, and also supplies power to a power storage unit 86, which is composed of a relatively large-capacity capacitor such as an electrolytic capacitor, to store power.

The operation based on the configuration of the third embodiment described above will be explained. The operation of generating a parallel resonance phenomenon on the card 51 side based on the radio waves from the sensor 52 side and thereby obtaining DC power for the card 51 is the same as that of the previous embodiment. A frequency that is generated and causes a parallel resonance phenomenon in the card 51 is used as a carrier wave, and data to be sent to the carrier wave is modulated using a pulse width modulation method.

Therefore, the card 51 can obtain DC power from such transmitted radio waves as in the above-described embodiment, and
The DC power energizes the circuit and enables data processing. That is, by specifying a desired address in the storage section 77 of the card 51 using such data generated from the sensor 52, a so-called shake is performed to extract different data from a single card 51 as the usage environment of the card 51 changes. It is also possible to communicate with each other by hand.

With such a configuration as well, it is possible to achieve the same effects as those described in the above-described embodiments, and to provide a remote actuating device with significantly improved convenience.

Although the data generated from the sensor 52 in the second embodiment is modulated using a pulse width modulation method, it is of course possible to use other modulation methods such as a frequency modulation method.

Effects of the Invention As described above, according to the present invention, the remote actuating device does not require an internal power source such as a battery, and maintenance work such as battery replacement is not required, thereby greatly improving convenience. Furthermore, if an internal power source such as a battery is provided, damage to the inside of the remote operating device may occur due to the expiration of the battery life, but the present invention prevents such a situation.

Further, according to the present invention, if the signal generated by the signal generating means is made to have a different form for each remote actuating device, the transmitting means, upon receiving the signal transmitted from the remote actuating device, can send a plurality of remote actuating devices. They will be able to identify each other.

The transmitting means may also be provided with modulating means for generating a signal by modulating the transmitted signal with a resonant frequency, and the remote actuating device may be provided with demodulating means, thereby making it possible to retrieve different data from the remote actuating device. .

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a sensor 10 according to an embodiment of the present invention, FIG. 2 is a block diagram of a card 20 of the same embodiment, and FIG.
4 is a perspective view of the main computer 40 of the same embodiment, FIG. 5 is a perspective view of the printer 32, FIG. 6 is a perspective view of the card 20, and FIG. 7 is a perspective view of the sensor 10. 8 is a block diagram of the sensor 20a of the second embodiment, FIG. 9 is a block diagram of the card 10a, and FIG. 10 is a block diagram of the sensor 20a of the second embodiment.
Block diagram of the basic configuration of the embodiment, No. 11 [! 1 is a block diagram of the sensor 52, and FIG. 12 is a block diagram of the card 51. 1... Contactless identification device, 10, 10a, 52...
Sensor, 13...LC series resonant circuit, 15...FM
Receiving means, 17...decoding circuit, 20.20a, 5
1... Card, 22... LC parallel resonant circuit, 23.
74... Rectifier circuit, 24... Regulator, 30...
...Control unit agent Patent attorney Number of strokes Kei part 311 Figure Figure Figure Figure Figure Figure Figure Figure Figure Figure 10 Figure Figure 12

Claims (3)

[Claims] (1) A remote operating device characterized in that it receives electromagnetic waves having a predetermined frequency emitted from a transmitting means, converts the electromagnetic energy into electric power, and operates using the electric power. (2) Resonant means having the above frequency as a resonant frequency, smoothing means for smoothing the output of the resonant means and outputting DC power, signal generating means energized by the output of the smoothing means, and converting the output of the signal generating means into electromagnetic waves. 2. The remote operating device according to claim 1, further comprising transmitting means for converting and transmitting a signal. (3) The transmitting means uses the frequency as a carrier wave frequency, and has modulating means for modulating the transmitted data with the carrier wave, and the remote operating device includes demodulating means for demodulating the transmitted data. The remote actuation device according to item 1.