JP2002198873A - High-frequency type remote driving apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the transmission speed of digital data transmitted/received between a base section and a remote section in a high-frequency type remote driving apparatus in which power from a power supply is transmitted from the base section to the remote section by wireless. SOLUTION: A high frequency signal for a power supply is electromagnetically emitted from an oscillation circuit 17 in a base section 13. In a remote section 23, this signal is electromagnetically induced, and then, is rectified and smoothed to generate a power supply voltage. In the section 23, a digital data signal S3 for decreasing the deviation between the power supply voltage and a reference voltage is formed, and an infrared ray is emitted from a light emitting element d2 based on the signal S3. In the section 13, the infrared ray from the element d2 is converted into an electric signal to generate a digital data signal S2, and an oscillation driving section 15 is variably controlled by a control signal S1 based on the signal S2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-frequency type remote driving device, which wirelessly transmits power supply power from a base unit to a remote unit, detects an object to be detected by the remote unit, and performs various control operations. The present invention relates to an improvement of a high-frequency remote drive device to be operated.

[0002]

2. Description of the Related Art For example, in an assembly line, parts and members are arranged and mounted on a moving container or tray to assemble a product. However, the arrangement or mounted parts or members are detected on the container or tray. In the case of inspection, it is necessary to perform a predetermined control operation by wirelessly transmitting power supply power from the base unit to the containers and trays as remote units.

Conventionally, a high-frequency type remote drive used for this kind of application has a configuration as shown in FIG.

That is, a pulse signal of, for example, 20 KHz is oscillated in the fixed-side base unit 1, and the pulse signal is output as a high-frequency signal for power supply from a resonance circuit 3 comprising a coil L 1 and a capacitor C 1 and resonating at 20 KHz. A resonance circuit 7 which emits power to the outside and a high-frequency signal for power supply electromagnetically transmitted from the base 1 in the movable remote unit 5 (container or tray) comprises a coil L2 and a capacitor C2 and resonates at 20 KHz. In addition, the induced high-frequency signal for power supply is rectified and smoothed and used as a drive power supply.

The remote unit 5 drives the light emitting diodes D1 to Dn to emit light when components or members are detected by switches SW1, SW2,..., SWn by a drive power transmitted wirelessly from the base unit 1, or not shown. Operate a mechanical operation such as an arm.

The remote unit 5 oscillates a high-frequency signal of, for example, 3 MHz and digitizes a control signal for reducing a deviation between the transmitted power supply voltage and a predetermined reference voltage. Modulates a high-frequency signal and consists of a coil L3 and a capacitor C3.
The modulated high-frequency signal is electromagnetically emitted to the outside from the resonance circuit 9 resonated at MHz, and the base unit 1 transmits the modulated high-frequency signal to the remote unit 5.
A modulated high-frequency signal transmitted electromagnetically from the control circuit is induced in a resonance circuit 11 composed of a coil L4 and a capacitor C4 and resonated at 3 MHz, a digital data signal is detected, and a digital data signal is emitted to the remote unit 5 based on the detected digital data signal. The level and frequency of the power-supply high-frequency signal are varied to stabilize the drive power of the remote unit 5 at a desirable level.

The remote unit 5 includes a switch SW1,
... A high-frequency signal of 3 MHz is modulated by the on-off signal (digital data signal) detected by SW2,..., SWn, and emitted from the resonance circuit 9, and the base unit 1 detects a digital data signal from the modulated high-frequency signal. SW
2. A configuration for displaying a display corresponding to SWn has also been proposed.

[0008]

However, in the high-frequency remote driving apparatus having the above-described configuration, the high-frequency signal is modulated by the digital data signal and electromagnetically transmitted from the remote unit 5 to the base unit 1 side. It is difficult to increase the transmission speed of the digital data signal transmitted from the remote unit 5 to the base unit 1 side.

That is, as shown in FIG. 6A, the digital data signal transmitted from the remote unit 5 to the base unit 1 is formed by combining an 8-bit or 16-bit pulse signal within a predetermined short timing cycle. As shown in FIG. B, the high-frequency signal modulated by this is also an alternating-current signal that changes in a short cycle. Therefore, when the timing cycle of the digital data signal is increased to approach the frequency of the high-frequency signal, the pulse width in FIG. It tends to be narrow, making it difficult to transmit and detect digital data signals. FIG. 6A shows only four bits in one cycle as an example.

[0010] Incidentally, in experiments by the present inventor, the limit was to increase the transmission rate per bit to about 200 microseconds, and the frequency of a high-frequency signal carrying a digital data signal was increased to, for example, a GHz band. However, there has been a problem that the situation has not been improved so much, and there has been a problem that as the frequency is increased, the price of component parts rises.

In a configuration in which a digital data signal is transmitted electromagnetically, power consumption for transmitting the digital data signal is required to some extent, so that the operation function on the remote unit 5 side is limited or the digital data signal is transmitted from the base unit 1. It is difficult to reduce power supply power.

The recent remote unit 5 has a tendency to increase the number of switches SW1, SW2,... SWn for detecting parts and members, and to enrich the robot arm and other mechanisms for performing mechanical operations. It is desired that the power to be wirelessly transmitted to the unit 5 be increased and the loss be reduced.

The present invention has been made under such a circumstance, and it is possible to greatly increase the transmission speed of digital data signals transmitted and received between a base unit and a remote unit, and to reduce power consumption. The purpose of the present invention is to provide a remote-type driving device.

[0014]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a high-frequency type remote driving apparatus according to the present invention is provided. And a base unit for supplying the high-frequency signal for power supply to the remote unit by electromagnetic coupling.The remote unit and the base unit have a transmission unit for transmitting a digital data signal from one of them, and are transmitted. A receiving unit that receives the digital data signal on the other side, the transmitting unit includes a light emitting element that emits an optical signal based on the digital data signal, and the receiving unit includes a light receiving element that receives the optical signal. are doing.

Further, in the present invention, it is preferable to use, as the light emitting element and the light receiving element, an element which emits and receives light having a wavelength longer than the infrared region.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, the base 13 is
It comprises an oscillation drive section 15, a resonance circuit 17, a reception section 19 having a light receiving element d1, a reception signal processing section 21, and the like.

The remote unit 23 includes a resonance circuit 25, a rectifying and smoothing circuit 27, a load circuit 29, a transmission signal processing unit 31, a transmission unit 33 having a light emitting element d2, and the like.

The oscillation drive section 15 of the base section 13 oscillates a high-frequency signal for power supply for transmitting power to the remote section 23, for example, a PWM signal of 20 KHz (see FIG. 2A or B), and receives an input control signal. It has a function of varying the duty ratio of the PWM signal based on S1 and is connected to the resonance circuit 17.

The resonance circuit 17 has a coil L5 and a capacitor C5 connected in parallel, resonates at 20 KHz, and is driven by the high-frequency signal for power supply.

The light receiving element d1 of the base section 13 receives infrared rays from a light emitting element d2 of the remote section 23, which will be described later,
It is a photodiode that converts to an electrical signal in response to intermittent infrared radiation.

The receiving section 19 drives the light receiving element d1 and amplifies or shapes the waveform of the serial intermittent electric signal from the light receiving element d1 to generate a digital data signal S2 described later. It is connected to the.

The receiving unit 19 includes, for example, as shown in FIG.
A connection point between the light receiving element d1 and the resistor R1 connected between the power source E and the ground is connected to the inverting input terminal of the operational amplifier OP via the resistor R2, and the resistors R3 and R connected between the power source E and the ground.
4 is connected to the non-inverting input terminal of the operational amplifier OP, the output terminal of the operational amplifier OP is connected to an amplifier circuit (not shown) at the subsequent stage, and is connected to the inverting input terminal via the resistor R5. The resistors R1 to R4 are bias resistors, and the resistor R5 is a feedback resistor.

The digital data signal shown in FIG. 2C is equivalent to the digital data signal S2 and S3 described later, and is extremely shorter than the period of the power supply high-frequency signal in FIGS. For simplicity, the period is exaggerated and long.

The received signal processing unit 21 converts the digital data signal S2 into parallel data, decodes the meaning of the digital data signal S2, forms a control signal S1 corresponding to the content, and generates an oscillation drive unit 15 and, if necessary, an external signal. It has the function of outputting to

For example, when the meaning of the digital data signal S2 is that the power supply voltage of the remote unit 23 is lower than the reference voltage, and the digital data signal S2 requires an increase in power supply power transmitted from the base unit 13 to the remote unit 23. And a control signal S1 for increasing the duty ratio of the power supply high-frequency signal (PWM signal) oscillated by the oscillation drive section 15. FIG. 2B shows a high-frequency signal for power supply whose duty ratio is larger than that of FIG.

The resonance circuit 25 of the remote unit 23 includes a coil L6 and a capacitor C6, is formed in a parallel form that resonates at 20 KHz, and induces a power supply high-frequency signal electromagnetically emitted from the resonance circuit 17 of the base unit 13. And connected to the rectifying and smoothing circuit 27.

The rectifying / smoothing circuit 27 includes, for example, a resonance circuit 25
Rectifier diodes D3, D4 connected forward from both ends of
And a choke coil CH having one end connected to the common cathode side of the diodes D3 and D4. The other end of the choke coil CH is connected to the load circuit 2
9 is connected.

Although not shown, the load circuit 29 includes, for example, a switch for detecting a component or a member, a light emitting diode for indicating the detection, and a load as a mechanical drive unit such as an arm. It has a built-in stabilization circuit for supplying a stable power supply voltage to the load, a DC-DC converter for boosting the power supply voltage, and the like.

The transmission signal processing unit 31 includes a rectifying / smoothing circuit 27
, Ie, a power supply voltage in the load circuit 29 and a predetermined reference voltage, and forms a digital data signal S3 for reducing the deviation. The digital data signal S3 is connected to the transmission unit 33.

For example, the digital data signal S3 is obtained by converting a value corresponding to the deviation from a parallel configuration of 6 bits or 8 bits to a serial configuration. A control signal S1 corresponding to the content is generated.

The transmitting section 33 forms a pulse drive signal which is intermittent at an arbitrary short timing in accordance with the serial bit configuration of the digital data signal S3, and is connected to the light emitting element d2.

The light emitting element d2 is a light emitting diode that emits infrared light in response to a pulse drive signal from the transmission unit 33 and emits light intermittently according to the intermittent pulse drive signal.

Next, the operation of the high-frequency remote driving device according to the present invention will be briefly described. When power is supplied to the base unit 13, the oscillation driving unit 15 of the base unit 13 oscillates a PWM signal (see FIG. 2A) having a predetermined initial duty ratio at 20 KHz as a power supply high-frequency signal, and the power supply high-frequency signal. Drives the resonance circuit 17 and emits it to the outside.

Initially, no infrared light is emitted from the remote unit 23, no electric signal is generated in the light receiving element d1, and the receiving unit 19 and the received signal processing unit 21 are connected to at least the light receiving element d1.
There is no operation based on the electrical signal from

When the resonance circuit 25 of the remote unit 23 approaches the resonance circuit 17 of the base unit 13, a high-frequency signal for power supply of 20 KHz is induced in the resonance circuit 25, and is rectified and smoothed by the rectification and smoothing circuit 27 to be DC. The power supply voltage is supplied to the load circuit 29.

The load circuit 29 detects a component or a member, displays a detection result, and causes a mechanical operation of an arm or the like based on the power supply voltage.

The transmission signal processing section 31 compares the power supply voltage in the load circuit 29 with the reference voltage, and if the power supply voltage is lower than the reference voltage, increases the power supply voltage to reduce the deviation thereof. When the power supply voltage is higher than the reference voltage, the data signal (serial signal) S3 is output as a digital data signal (serial signal) S3 having a bit configuration such that the power supply voltage is lowered to reduce the deviation.

The transmitting section 33 forms a pulse driving signal which is intermittently at a short timing in accordance with the digital data signal S3, and drives the light emitting element d2 to emit light intermittently to emit infrared rays.

The receiving section 19 of the base section 13 includes a light emitting element d
2 is converted into an electric signal and output to the receiving unit 19, and the receiving unit 19 shapes the waveform of the intermittent electric signal and generates a digital data signal S2. Output.

The received signal processing section 21 decodes the meaning of the digital data signal S2, that is, whether the request is to increase the power supply voltage or to decrease the power supply voltage, and forms a control signal S1 corresponding to the content. Output to the oscillation drive unit 15 and others.

If the control signal S1 requests a rise in the power supply voltage, the oscillation drive section 15 oscillates a PWM signal having a large duty ratio and transmits it to the remote section 23, as shown in FIG. 2B. If it is a control signal S1 requesting a voltage drop, a PWM signal with a reduced duty ratio is oscillated and transmitted, although not shown.

As described above, in the high-frequency type remote drive device of the present invention, the base unit 13 electromagnetically emits a high-frequency signal for a power supply having a predetermined frequency from the resonance circuit 17 to the outside, and the remote unit 23 controls the power supply high-frequency signal. While high-frequency signals are electromagnetically induced, rectified and smoothed to generate and operate a power supply voltage,
The remote unit 23 forms a digital data signal S3 having a content for reducing the deviation between the power supply voltage and the reference voltage, and based on the digital data signal S3, a light emitting element d.
2 is driven to emit light intermittently.
2 is converted into an electric signal to generate a digital data signal S2, and the oscillation driving unit 15 is controlled by a control signal S1 based on the digital data signal S2.

Therefore, as compared with the conventional configuration in which the digital data signal transmitted from the remote unit 23 is modulated with a high-frequency signal and transmitted electromagnetically, the light emitting element d
2 can be driven to emit light intermittently at a very high cycle,
As can be seen from FIG. 3, since the light emitting element d2 can easily convert the electric signal into an electric signal corresponding to the intermittent infrared light and output the electric signal, the digital data signal can be transmitted at a significantly high speed. High-speed and stable control of the power supply voltage becomes possible.

According to the experiment of the present inventor, the transmission rate per bit is about 2 to 20 microseconds, which is about 1/100 of that of the conventional configuration in which digital data signals are transmitted electromagnetically. Could be transformed.

Further, the driving current flowing through the issuing element d2 is:
The distance between the remote unit 23 and the base unit 13 is several mm to several c
If the distance is about m, it is possible to keep the distance very small, and thus there is an advantage that the power of the remote unit 23 can be reduced.

The high-frequency type remote driving device shown in FIG.
The digital data signal is transmitted from the remote unit 23 to the base unit 13.
Although a configuration for optically transmitting digital data signals to the remote unit 23 from the base unit 13 and a configuration for bidirectional optical transmission of individual digital data signals from the base unit 13 are also possible in the present invention. is there.

FIG. 4 relates to a high-frequency remote driving apparatus according to the present invention, and shows a configuration for optically transmitting a digital data signal bidirectionally.

In FIG. 4, in addition to the oscillation drive unit 15, the resonance circuit 17, the resonance circuit 25, and the reception unit 19, the base unit 13 includes a signal processing unit 35 and a transmission unit 3 having a light emitting element d3.
7 and the like.

The remote unit 23 includes a resonance circuit 25, a rectifying and smoothing circuit 27, a load circuit 29, a transmission unit 33, a signal processing unit 39, a reception unit 41 having a light receiving element d4, and the like.

Oscillation driver 15, resonance circuit 17, receiver 1
9, the operation of the resonance circuit 25, the rectifying and smoothing circuit 27, the load circuit 29, and the transmission unit 33 are the same as those in FIG.

The signal processing section 35 of the base section 13 decodes the meaning of the digital data signal S2 from the receiving section 19 as described above, forms a control signal S1 corresponding to the content, and generates an oscillation driving section. 15 and a function of outputting to the outside, and transmitting control information for controlling the detection function and the arm function of the remote unit 23 to the remote unit 23, for example.
The data is converted into a digital data signal S4 having a serial configuration of bits or 8 bits, and is connected to the transmission unit 37.

The transmitting section 37 forms a pulse drive signal that is intermittent at an arbitrary short timing in accordance with the bit configuration of the digital data signal S4, and is connected to the light emitting element d3.

The light emitting element d3 is a light emitting diode that emits infrared light in response to a pulse drive signal from the transmission unit 37, and emits light intermittently according to the intermittent pulse drive signal.

On the other hand, the signal processing section 39 of the remote section 23
Transmits the digital data signal S3 that reduces the deviation between the power supply voltage and the reference voltage in the load circuit 29.
3 and decodes the meaning of the digital data signal S5 obtained from the receiving unit 41 to form a control signal S6 corresponding to the content, as described later. This is output to the detection unit and the arm unit.

The light receiving element d4 of the remote unit 23 is a photodiode that receives infrared light from the light emitting element d3 of the base unit 13 and converts the infrared light into an electric signal corresponding to the intermittent light.

The receiving section 41 has a function similar to that of the receiving section 19 of FIG. 1. The receiving section 41 drives the light receiving element d4 and shapes the intermittent electric signal from the light receiving element d4 into, for example, a waveform to convert the digital data signal S5. It is generated and connected to the signal processing unit 39.

In the high-frequency type remote driving device shown in FIG. 3, a digital data signal can be transmitted from the remote unit 23 to the base unit 13 using infrared rays as described above. Is transmitted to the remote unit 23 using infrared rays,
The remote unit 23 can be wirelessly controlled from the base unit 13 side.

In each of the above-described embodiments, the configuration using infrared light as a medium for transmitting digital data signals has been described. However, the present invention is not limited to this.
It is possible to use laser light, far infrared light, or light having a longer wavelength than infrared light.

In particular, by using light in the infrared region and light having a longer wavelength, the light-emitting and
Even if there is some obstacle between the light-emitting and light-receiving elements d2 and d4 of the remote unit 23, the light emitted by the light-emitting elements d2 and d3 can be received by the light-receiving elements d1 and d4 and the light can be emitted. Also, the light receiving element is inexpensive.

As for the light emitting and receiving elements d1 to d4, various electronic component elements can be used according to the type of light as a transmission medium. Light emitting diodes, optical communication diodes, semiconductor laser elements and the like can be used as the light emitting elements. As a light receiving element, a photoelectric conversion element such as cds, a photodiode, a phototransistor, a photothyristor, and the like can be arbitrarily selected.

Further, the digital data signal optically transmitted between the light-emitting and light-receiving elements d1 to d4 can be transmitted not only by intermittent light but also by a bit configuration depending on the intensity of the light. The portions 19 and 41 may be formed.

The digital data signal transmitted between the base unit 13 and the remote unit 23 is not limited to the transmission power control information but may be any operation control information.

[0063]

As described above, the high-frequency type remote driving apparatus according to the present invention is a system for electromagnetically transmitting power supply power from a base unit to a remote unit.
The remote unit and the base unit each have a transmitting unit for transmitting a digital data signal from one of them, and a receiving unit for receiving the transmitted digital data signal on the other, and the transmitting unit transmits the digital data signal to the digital data signal. It has a light-emitting element that emits an optical signal based on it, and the receiving unit has a light-receiving element that receives the optical signal, so that the transmission speed of digital data signals transmitted and received between the base unit and the remote unit is greatly increased. It is possible to reduce power consumption and transmission power in the remote unit. Further, in the present invention, in the configuration in which the light emitting element and the light receiving element use an element that emits and receives light having a wavelength longer than the infrared region, in addition to the above-described advantages, transmission of a digital data signal is reliable, Light emitting and light receiving elements are available at low cost.

[Brief description of the drawings]

FIG. 1 is a schematic block diagram showing an embodiment of a high-frequency type remote drive device according to the present invention.

FIG. 2 is a waveform chart showing a part of the operation of the high-frequency remote drive device shown in FIG.

FIG. 3 is a schematic circuit diagram of a main part showing a receiving unit in FIG. 1;

FIG. 4 is a schematic block diagram showing another embodiment of the high-frequency remote drive device of the present invention.

FIG. 5 is a schematic block diagram showing a conventional high-frequency remote drive.

6 is a waveform chart showing a part of the operation of the high-frequency remote drive device shown in FIG.

[Explanation of symbols]

 1, 13 Base unit 3, 7, 9, 11, 17, 25 Resonant circuit 5, 23 Remote unit 15 Oscillation drive unit 19, 41 Receiving unit 21 Received signal processing unit 27 Rectifying and smoothing circuit 29 Load circuit 31 Transmission signal processing unit 33 , 37 transmitting sections 35, 39 signal processing sections C1, C2, C3, C4 capacitors D1, D2, Dn light emitting diodes D3, D4 diodes d1, d4 light receiving elements d2, d3 light emitting elements L1, L2, L3, L4, coil R1, R2, R3, R4, R5 Resistance OP Operational Amplifier SW1, SW2, SWn Switch

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Yoshiaki Gonda 274 Gomei, Tamagawa-mura, Hiki-gun, Saitama Japan Inside the Tamagawa Plant of Roof Co., Ltd. No. Chuo Denshi Kogyo Co., Ltd. F-term (reference) 5K002 BA14 BA16 FA03 GA04 GA07 5K012 AB05 AC06 AE13 BA03

Claims (2)

[Claims] 1. A remote unit that electronically operates with a drive power supply based on a power supply high-frequency signal supplied by being electromagnetically coupled, and a base unit that supplies the power supply high-frequency signal to the remote unit by electromagnetic coupling. In the high-frequency type remote driving device provided, the remote unit and the base unit have a transmitting unit that transmits a digital data signal from one of them and a receiving unit that receives the transmitted digital data signal on the other, The high-frequency remote driving device according to claim 1, wherein the transmitting unit includes a light emitting element that emits an optical signal based on the digital data signal, and the receiving unit includes a light receiving element that receives the optical signal. 2. The high-frequency remote drive according to claim 1, wherein the light-emitting element and the light-receiving element emit and receive light having a wavelength longer than the infrared region.