JPS58115945A - Power transmission and signal transmission and reception method to steering section - Google Patents

Abstract

PURPOSE:To improve the reliability, by connecting a car body fixed section and a steering section with a contactless method, reducing a required space for wirings remarkably by means of arranged jumpers, and preventing the mixing of noise. CONSTITUTION:A rotary transformer 3 is placed in opposition to a shaft of the steering section and the fixed section, magnetic cores 4, 5, and coils 4a, 5a are formed at the inside, allowing to attain stable electromagnetic coupling and transforming performance regardless of the rotation of the steering. The coils 4a, 5a are shielded for electromagnetic waves in an excellent way to external devices and are connection elements of a transmission line hardly invaded with noise. Signals are converted into AC at an inverter 10 and given to a synthesis and separation circuit 11. Further, a transmission signal is given to the circuit 11 and superimposed on a positive half wave of a power transmission wave and transmitted to a synthesis separation circuit 16 of the steering section 1 via the rotary transformer 3, signals are separated from the power transmission waves at the circuit 16 and the signals are given to a reception demodulation circuit 20. The power transmission wave transmitted from the circuit 16 to a rectifying and stabilization circuit 17 is converted into DC and applied to each circuit.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for simultaneously transmitting and receiving signals while transmitting electric power from a vehicle body fixed part to a steering wheel part of an automobile.

In automobiles, drivers1
It has been proposed to place switches and various indicators necessary for driving on the top of the handle, where drivers always place their hands.

However, when installing switches and various indicators on the rotating handle, it is necessary to route power supply lines to the handle and numerous signal transmission lines for each device from the vehicle body to the rotating handle. A slip ring and a sliding contact are used to electrically connect the handle while allowing rotation of the handle, or a helical or spiral conductor is used as the connection wire.

Therefore, with the former connection method, contact failure is likely to occur due to wear of the slip rings and sliding contacts, causing malfunctions, resulting in low reliability, while with the latter connection method, the space required for wiring is large and the external There were problems such as the fact that it was easy to pick up noise.

This invention was made in order to solve the above-mentioned problems, and in addition to connecting the fixed part and the handle part without contact, it also consolidates and organizes the connecting wires of the connecting part, greatly reducing the space required for wiring. It is an object of the present invention to provide a method for transmitting power to a handle portion and transmitting and receiving signals, which can reduce noise and improve reliability by preventing noise from entering. In order to keep this in mind, the present invention provides a mechanism for moving from the fixed part to the handle part via a rotary transformer in which at least/pair of coils are wound around a magnet D placed opposite to the shaft of the handle part and the fixed part. A method of simultaneously transmitting and receiving signals while transmitting power, in which a time-division multiplexed signal or a frequency-division multiplexed signal is superimposed on the power transmission wave that is formed at the fixed part and transmitted to the handle part by a rotating transformer. The gist is that the system is configured to transmit and receive signals.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an explanation will be given based on the drawings of embodiments of the present invention.

FIG. 1 shows a cross section of a handle portion 1 of an automobile, and FIG. 2 shows an enlarged perspective view of a rotary transformer B used for a signal and power transmission line connection between a fixed portion 2 and a handle portion 1. As shown in FIG. This rotary transformer 3 has independent coils zL/4a and 5a wound around donut-shaped magnets 4 and 5, which are arranged opposite to the shaft of the handle and a fixed part and have a recess inside, respectively. Even if D4 and D4 rotate relative to each other, the carp/L'4a 5- . The structure is such that the electromagnetic coupling between 5a is not affected by this and stable transformer performance can be obtained. In addition, since the coils/I/4a and 5a are surrounded by the magnets 4 and 5, except for those facing each other, they are well electromagnetically shielded from the outside, making it difficult for noise to penetrate into the connection area of the transmission line. It consists of In addition,
The magnet, b, and coil of the rotating transformer may be formed into a pot shape as necessary, or may be configured to have multiple annular grooves formed on a disk so that more than one pair of coils can be wound therein. You can also do it. 7
An operation panel is connected to the coil 4a by wiring and is attached to the front of the handle portion 1, on which switches and various indicators are arranged.

FIG. 3 shows a block diagram of a transmission circuit that transmits power from the fixed part 2 to the handle part 1 and also transmits and receives signals by superimposing a time division multiplexed signal on a power transmission wave. First, in the circuit on the fixed part 2 side, 8 is a clock pulse oscillator that applies a clock pulse signal to the transmission modulation circuit 12 and the reception demodulation circuit 13, and 10 is an inverter that converts the DC input from the variation B into a square wave AC. be. 1
6-1 is a combination/separator that superimposes a time division multiplexed signal from the transmission modulation circuit 12 on the power transmission wave from the impa-tower 10, and further receives and separates the signal transmitted from the handle section 1. The circuit is connected to the coil 5a of the rotary tranne B. Based on the input clock pulse signal, the transmission modulation circuit 12 generates a time-division signal according to the state of the switch section 14 provided in the fixed section 2, and sends it to the synthesis/separation circuit 11. The signal is also configured to be sent to the handle portion 1 side. 13 is a reception demodulation circuit which inputs a clock pulse signal for demodulation from the clock pulse oscillator 8, receives a signal from the handle part 1 via a synthesis/separation circuit 11, and demodulates the reception signal based on the clock pulse signal. The connection structure is such that a drive signal is sent to the actuator section 15. The actuator section 15 is, for example, a device such as an automobile lamp or a wiper device, and is actuated by operating the switch section 22 of the handle section 1. In the handle section 1, 16 is a coil of one of the rotary transformers 3. /l/4a, which separates the power transmission wave from the fixed part 2 and the signal superimposed on it, sends the AC power to the rectification/stabilization circuit 17, and sends the received signal to the reception In addition to sending it to the demodulation circuit 20, it also sends it to the transmission modulation circuit 19.
It is configured such that a signal based on the operation of the switch section 22 sent from the power transmission wave is superimposed on a power transmission wave and transmitted to the fixed section 2 . Reference numeral 35 denotes a timing extraction circuit which operates to extract the timing of the transmission signal from the transmission signal sent from the fixed part 2 side, and to command the timing 2 of oscillation of the clock pulse oscillator 36 based on this timing signal. The transmission modulation circuit 19 inputs the pulse signal from the clock pulse oscillator 36, and based on this pulse No. 100 encodes the states of the various switch sections 22 provided in the handle section 1 to create a time-division signal. The reception demodulation circuit 20 is connected to send the pulse signal for demodulation from the clock pulse oscillator 36 to the synthesis/separation circuit 16.
and demodulate the received signal based on the pulse signal? It is connected so as to separate and identify and send a drive signal to an actuator unit 21 such as a display.

Next, to explain the power transmission and signal transmission/reception operations in the circuit shown in FIG. Sent. On the other hand, in the transmission modulation circuit 12, a signal encoding the state of the switch unit 14 is generated based on the pulse signal from the clock pulse oscillator 8, and this transmission signal is sent to the synthesis/separation circuit 11 to generate a signal that encodes the state of the power transmission wave. is superimposed on the half-wave part of Then, the power transmission wave on which the signal has been superimposed is sent to the combination/separation circuit 16 of the handle section 1 via the rotary transformer 3, where the signal is separated from the power transmission wave, and the signal is sent to the reception demodulation circuit 20. The timing extraction circuit 35 extracts the timing of the received signal, and based on this, the C clock pulse oscillator 3
6 is driven, and a clock pulse for demodulation is applied to the reception demodulation circuit 20-9=. Then, the reception demodulation circuit 20 demodulates the reception signal using this clock pulse signal, and a drive signal is sent to the actuator section 21 specified by the signal, so that, for example, a display on the handle section 1 is displayed. Note that the power transmission wave sent from the combination/separation circuit 16 to the rectification/stabilization circuit 17 is converted into direct current and supplied to each circuit.

On the other hand, the switch section 22 operated on the handle section 1
The signal is modulated based on the puff-less signal of the clock pulse oscillator 36, and sent to the gold component j chick circuit 16, where the transmitted signal is superimposed on the negative half period of the power transmission wave, and passed through the rotating transformer 3. The signal is sent to the combination/separation circuit 11 of the fixed section 2. This received signal is separated from the power transmission wave at this point,
The signal is sent to the reception demodulation circuit 13. The reception demodulation circuit 13 demodulates the reception signal based on the pulse signal from the clock pulse oscillator 8, and this signal sends a drive signal to the designated actuator section 15, so that an operation such as turning on a light is performed, for example. .

In addition, in the above embodiment, the component separation circuit 11.1-1〇
- Although the signal was superimposed and separated on the power transmission wave by Party B, each coil/L'4B, 5a was made into two windings, and the power transmission wave and signal were input to each coil separately. The combination/separation circuit can also be omitted.

FIG. 1 shows power transmission from the fixed part 2 to the handle part 1, and a time division multiplexed signal synchronized with the power transmission wave. This is a block diagram of a transmission circuit that sends and receives signals in a superimposed manner. First, to explain the circuits provided on the fixed part 2 side, 8 is a clock pulse oscillator, and 9 is a divider, which divides the clock signal and generates a low frequency signal of several tens to several KHz used for power transmission. Make impa-
10. Reference numeral 11 denotes a synthesis/separation circuit that superimposes various signals sent from a circuit described later on the AC power transmission wave of a predetermined frequency generated by the inverter 10, or receives and separates the signal transmitted from the handle part 1. It is. 12 is a transmission modulation circuit which inputs the transmission timing pulse sent from the clock pulse oscillator 8, and based on this timing pulse, generates a time division signal according to the state of the switch section 14 provided in the fixed section 2IllI. It is connected so that it is produced and sent to the synthesis/separation circuit 11. Reference numeral 13 denotes a reception demodulation circuit which receives timing pulses for reception from the clock pulse oscillator 8, receives pulse signals sent from the handle section via a synthesis/separation circuit 11, and transmits signals based on the timing pulses. The connected pulse signals are separated and identified, and are connected to each drive signal to the actuator section 15. The actuator section 15 is, for example, an operating device such as a lamp or wiper device of an automobile, and is activated by operating the switch section 22 of the handle section 1. Further, B is an automobile battery that serves as a power source for each electric circuit.

Next, to explain the circuit configuration provided on the handle part 1 side, 16 is a combination/separation circuit, which inputs the power transmission wave from the fixed part 2 and the signal superimposed thereon via the circulation transformer 3. The signal is separated from the power transmission wave and sent to the reception demodulation circuit 20, and the AC power is rectified and stabilized by the circuit 1.
The power transmission wave is connected so that a signal based on the operation of the switch unit 22 sent from the transmission modulation circuit 19 is superimposed on the power transmission wave. Reference numeral 18 denotes a synchronous oscillator consisting of a PLLu path, etc., which oscillates a timing pulse signal having a phase and frequency that completely matches the signal transmitted from the fixed part 2, and sends it to the transmission modulation circuit 19 and the reception demodulation circuit 20.
It is configured such that signal processing on the handle portion 1 side is performed in synchronization with the fixed portion 2 side. The transmission modulation circuit 19 inputs the timing pulse signal from the synchronous oscillator 18, and based on this timing pulse, codes the state of the switch section 22 installed in the handle section 1 for lighting the T lamp and operating various devices. It is connected so as to send the divided signals to a combination/separation circuit 16. Further, the reception demodulation circuit 20 receives input from the reception timing pulse and the I-less synchronous oscillator 18 as well as a signal sent from the fixed part 2 via the synthesis/separation circuit 16, and converts the reception signal based on the timing pulse. They are separated and identified, and connected to the actuator sections 21 such as various indicators and lamps arranged on the handle section 1 so as to send drive signals 13- respectively. 17 is a rectification/stabilization circuit, which operates to rectify the AC power sent from the synthesis/separation circuit 16 and supply stabilized DC power to each circuit of the handle portion 1.

Note that by making the power transmission wave a square wave created by frequency-dividing the clock pulse, the temporal relationship between the power transmission wave and the signal pulse is always constant. The circuit of the above configuration, which can also use the start-stop synchronization method based on the falling time, transmits power and signals from the fixed part 2 to the handle part 1, and handle part 1.
Signal transmission from the fixed part 2 to the fixed part 2 is carried out as follows.

First, in the inverter 10, the frequency of the oscillation signal from the clock pulse oscillator 8 is divided by the frequency divider 9 to form a square wave of several hundred Hz. and sends it to the synthesis/separation circuit 11.

On the other hand, in the transmission modulation circuit 12, a signal encoding the state of the switch section 14 is generated at a period considerably shorter than the original oscillation frequency of the clock pulse oscillator 8, that is, the square wave described above.
1, this signal is superimposed on the positive half wave of the square wave for gravity transmission.The transmission signal from the handle part 1 is superimposed on the negative half wave of the power transmission wave, and the transmission wave of the transmitted and received signal is The signal modulation and separation are made easy by performing the distribution at the Here, the signal is separated from the power transmission wave, and the signal is sent to the reception demodulation circuit 20. On the other hand, the synchronous oscillator 18 generates a timing pulse oscillated by the clock pulse oscillator 8 of the fixed part 2 based on the reception signal. A timing pulse that is completely synchronized with the V signal is generated and applied to the reception demodulation circuit 20. Therefore, the reception demodulation circuit 20 demodulates the reception signal using this timing pulse, and the actuator section specified by the signal is activated. An operation command signal is sent to 21 to turn on a lamp or the like, for example.The power transmission wave sent from the synthesis/separation circuit 16 to the rectification/stabilization circuit 17 is converted into direct current and supplied to each circuit.

On the other hand, the switch section 2 operated on the handle section 1
2 signal is sent to the synchronous 5a FA unit 1 by the transmission modulation circuit 19.
It is modulated based on the timing pulse signal from 8 and sent to the synthesis/separation circuit 16. Here, the transmission signal is superimposed on the negative half period of the power transmission wave, and is sent to the combination/separation circuit 11 of the fixed part 2 via the rotary transformer 6. This received signal is separated from the power transmission wave here and is then separated into the receiving demodulation circuit 1.
3, the received signal is demodulated in the reception demodulation circuit 13 based on a predetermined timing pulse signal applied from the clock pulse oscillator 8, and an operation command signal is sent to the designated actuator section 15 based on this signal, for example. , starting the wiper device, etc., are performed in response to the switch section 22 of the handle section 1.

FIG. 5 shows an embodiment in which signal transmission is performed by superimposing a frequency-divided signal on a power transmission wave.

To explain the circuit configuration, first, in the fixed part 2,
10 is a direct current supplied from battery B, for example, several hundred H2.
This is an inverter that converts the AC power into low-frequency AC power and sends the AC power to the combining/separating circuit 11. The combining/separating circuit 11 operates to superimpose a frequency division signal, which will be described later, on this power transmission wave and send it to the rotating transformer 6. do. 23 is an oscillator that outputs a frequency signal with a considerably higher frequency than the frequency of the power transmission wave, for example, several MHz. It is composed of n oscillators that oscillate different frequency signals from fl to fn, and each oscillator are connected to send a signal of a predetermined frequency to the synthesis/separation circuit 11 by each switch operation of the switch section 14. Further, 24 is a receiving filter, which is separated from the synthesis/separation circuit 11 and passes the frequency signal from the handle part 1 through a bandpass filter having frequency characteristics from fn+1 to fn-1-m to obtain a predetermined frequency signal. It is connected so as to operate the device of the actuator unit 15 connected to the output side by taking it out.

On the other hand, in the circuit of the handle part 1, 16 is the fixed part 2
17- A power transmission wave on which a frequency division multiplexed signal is superimposed is inputted via the rotating transformer 3, and the frequency division multiplexed signal is separated, and another frequency division multiplexed signal sent from the handle part 1 to the fixed part 2 is converted into power. The synthesis/separation circuit 17 superimposed on the transmission wave is a rectification/stabilization circuit that inputs and rectifies the AC power taken out from the synthesis/separation circuit 16 and supplies DC power to each circuit. Furthermore, 25 is a receiving filter, which extracts a specific frequency signal by passing the frequency signal from the fixed part 2 separated from the synthesis/separation circuit 16 through a bandpass filter having frequency characteristics from fl to fn. Thus, the actuator section 21 connected to the output side is connected to operate the device. 26 is an oscillator that outputs a frequency signal of several MHz, and is connected to output different frequency signals from fn+ to fn0m by each switch operation of the switch section 22, and send it to the synthesis/separation circuit 16. ing.

According to the circuit shown in FIG. S, a frequency signal of, for example, f is output from the oscillator 26 connected to the switch circuit based on the operation of the switch section 14.

18- Then, in the synthesis/separation circuit 11, a transmission signal having a considerably higher frequency fl is superimposed on the power transmission wave sent from the inverter 10, and this frequency-divided signal and the power transmission wave are combined through the rotary transformer 6. The signal is sent to the synthesis/separation circuit 16 of section 1. In the synthesis/separation circuit 16, the frequency-divided signal is separated from the power transmission wave and sent to the receiving filter 25, and the power transmission wave is sent to the rectification/stabilization circuit 17, where it is rectified and supplied to each circuit. Ru. On the other hand, the frequency-divided signal having a frequency of, for example, r, sent to the receiving filter 25 is extracted by the filter fl, and the device of the actuator unit 21 connected to the circuit is operated.

On the other hand, when a frequency signal of fn+, for example, is output from the oscillator 26 by operating the switch section 22 of the handle section 1, this is sent to the synthesis/separation circuit 16 and superimposed on the power transmission wave. Then, in the fixed unit 2, the frequency signal fn+ is separated from the power transmission wave by the synthesis/separation circuit 16, and is applied to the reception filter 24. In the receiving filter 24, this frequency signal is extracted through a filter having a bandpass characteristic of fn+, and the actuator section 15 connected thereto is operated in response to a switch on the handle section 1.

FIG. 4 shows another embodiment of the power transmission and signal transmission/reception method by frequency division, and its circuit configuration will be explained. First, in the fixed part 2, 33 is an oscillator, 10 is an inverter, 1
1 is a synthesis/separation circuit.

27 inputs the reference frequency signal from the oscillator 33;
Frequency signals for power transmission waves and from 1゛1 to fn and rn
It is a multi-frequency divider that divides and creates each frequency signal for transmission and reception from '-1 to fn-1-m. WiM applied to 10 and much higher than this,
The frequency signal from fl to fn of I(z is
4 and the combining circuit 29 to the combining/separating circuit 11.
Frequency signals from n+ to Cn+m are processed by a synchronous detector 28.
connected to be sent to. In addition, the coupling circuit 29
is composed of a buffer circuit etc. for putting frequency signals from l to fn on the same line, and the synchronous detector 28 receives frequency signals from f n +1 to rn sent from the handle part 1.
The frequency division signal of 10m i is detected by each demodulation frequency signal from the multi-frequency demultiplexer 27, the signal is extracted, and the actuator 15 on the output side is actuated.

On the other hand, in the handle part 1, 16 is a combination/separation circuit connected to the combination/separation circuit 11 of the fixed part 2 via the rotary transformer 6, and 17 is a DC power source that rectifies the power transmission wave output from the combination/separation circuit 16. This is a rectification and stabilization circuit that supplies each circuit as a 34 is a synchronous oscillator consisting of a PLL circuit, etc., which inputs the power transmission wave and frequency division multiplexed signal sent from the fixed part 2, and generates the same oscillation frequency as the oscillation frequency of the oscillator 33, which is the basis of the power transmission wave in the fixed part 2. , oscillates a reference frequency signal of the same phase, and transmits this signal to the multi-frequency frequency divider 30.
Configured to send to the connected device.

The multi-frequency divider 30 has almost the same configuration as the multi-frequency divider 27 on the fixed part side, and inputs and divides the base 21-zero frequency signal from the synchronous oscillator 34, and outputs frequency signals from fl to fn. is applied to the synchronous detector 32 as a demodulation signal, and the output frequency signals from fn-1-1 to fn10m are connected so as to be sent to the synthesis/separation circuit 16 via the switch section 22 and the coupling circuit 61. be done. Synchronous detector 3
2 detects the frequency-divided signals f, to fn sent from the fixed part 2 by the respective demodulating frequency signals from the multi-frequency divider 30, and thereby moves the actuator 21 on the output side. connected to the configuration.

In the transmission circuit shown in Fig. 4, in the inverter 1o, DC is converted into AC power by a frequency signal of about several hundred Hz created by dividing the reference frequency of the oscillator 3B by a multi-frequency divider 27, and then synthesized. The signal is sent to the separation circuit 11. On the other hand, when the switch fl, for example, is operated in the switch unit 14, a signal with a high frequency f1 of, for example, several MHz is applied from the multi-frequency divider 27 to the synthesis/separation circuit 11 via the switch and the coupling circuit 29. Ru. Then, the synthesis/separation circuit 11
Then, the frequency signal fl is superimposed on the power transmission wave 22-, and this power transmission wave is sent to the synthesis/separation circuit 16 of the handle portion 1 via the rotary transformer. The synthesis/separation circuit 16 separates the fl frequency signal from the power transmission wave and sends it to the synchronous detector 32 . On the other hand, the synchronous oscillator 34 oscillates a frequency signal synchronized with the reference frequency generated by the fixed section 2 based on the frequencies of the power transmission wave and the frequency division multiplexed signal, and outputs it to the multifrequency branching unit 30. Therefore, the multi-frequency divider 30 divides this signal to create a frequency signal of rl for demodulation, and sends it to the synchronous detector 32 to perform synchronous detection. As a result, a detected output is output from the synchronous detector of fl, and the actuator 21 connected to this circuit is activated in response to the switch operation of the fixed part 2.

On the other hand, in the switch section 22 of the handle section 1, rr++
, when the switch of the circuit of , is operated, a signal of frequency f n + + is sent to the combining circuit 16 via the coupling circuit 31, where the transmission signal of fn+1 is superimposed on the power transmission wave and the rotating transformer 3 The signal is transmitted to the combining/separating circuit 11 on the fixed part 2 side via the.

Then, the synthesis/separation circuit 11 separates this f n ++ received signal and sends it to the synchronous detector 28 , where the synchronous detector 28 receives the f n + frequency signal from the multi-frequency frequency divider 27 . The circuit performs synchronous detection,
By outputting the detection output of this circuit, the actuator 15 connected to this output circuit operates in response to the operation of the handle portion 1.

In addition, when sending an audio signal from the fixed part to the handle part and emitting the sound from the speaker installed in the handle part, PAM, PTM, PC! It is also possible to transmit signals using M or the like.

As described above, according to the signal transmission and reception method according to the present invention,
Electric power is transmitted from the fixed part to the handle part through a rotary transformer in which at least a pair of coils /I/ are wound around a magnetic U placed opposite the shaft of the handle part and the fixed part, while transmitting signals at the same time. A method of transmitting and receiving signals by superimposing a time-division multiplexed signal or a frequency-division multiplexed signal on a power transmission wave formed in a fixed part and transmitted to the handle part via a rotating transformer. With this configuration, the transmission path can be made small and compact, and noise can be prevented from entering the transmission path, allowing highly reliable power and signal transmission against noise.

In addition, the structure of the transmission circuit for both the fixed part and the handle part can be relatively simple.

[Brief explanation of the drawing]

The figures show embodiments of the present invention, in which Fig. 1 is a longitudinal cross-sectional view of the handle part, Fig. 2 is a perspective view of the rotary transformer, Fig. 3 is a block diagram of the transmission circuit, Fig. 7, Fig. S, Fig. Figure O is a transmission circuit block diagram of another embodiment. DESCRIPTION OF SYMBOLS 1... Handle part, 2... Fixed part, 3... Rotating transformer, 4, 5... Magnetizing, 4a, 5.a... Coil, 8... Clock Hals oscillator, 9. ...Frequency divider, 1
0... Inverter, 11.16... Synthesis/separation circuit,
12.19... Transmission modulation circuit, 13.20... Receiving demodulation circuit, +8... Synchronous oscillator. -25= Fig. 1 2E

Claims (6)

[Claims] (1) Electric power is transmitted from the fixed part to the handle side through a rotating transformer with at least one pair of coils/l/'; However, this is a method of transmitting and receiving signals at the same time, in which signals are transmitted and received by superimposing time-division multiplexed signals on power transmission waves that are formed in the fixed part and transmitted to the handle part by the rotary transformer. The power transmission and signal transmission/reception method to the handle section is characterized by: (2) Power is transmitted from the fixed part to the handle side while simultaneously transmitting and receiving signals through a rotating transformer in which at least one pair of coils is wound around a magnetic Iu placed opposite the handle part and the fixed part. A method for transmitting and receiving signals by superimposing a time-division multiplexed signal on a power transmission wave formed in the fixed part and transmitted to the handle part by the rotary transformer, and transmitting and receiving the signal. Synchronize and create the clock pulse signal of the power transmission wave with the power transmission wave, and use a part of the power transmission wave as a synchronization signal for demodulating the time division multiplexed signal? Features include power transmission to the handle and signal transmission/reception method. (3) The handle according to claims 1 and 2, characterized in that transmission and reception of the time division multiplexed signal are separately superimposed on the positive half wave and the negative half wave of the power transmission wave. power transmission and signal transmission/reception methods. (4) Power is transmitted from the fixed part to the handle part through a rotating transformer in which at least one pair of coils is wound around a magnetic U placed opposite the handle part and the fixed part, while simultaneously transmitting signals. A method for transmitting and receiving signals to a handle part, the method comprising transmitting and receiving signals by superimposing a frequency division multiplexed signal on a power transmission wave formed in a fixed part and transmitted to the handle part by the rotary transformer. power transmission and signal transmission/reception methods. (5) Magnet 1b placed opposite the handle part and fixed part
This method transmits power from the fixed part to the handle part through a rotating transformer having at least a pair of coils wound thereon, and simultaneously sends and receives signals. A frequency division multiplexed signal is superimposed on the power transmission wave transmitted to the
A method for transmitting power to a handle portion and transmitting and receiving signals, characterized in that the frequency division multiplexed signal is created in synchronization with the frequency of the power transmission wave. (6) The handle portion according to claims 3 and 4, wherein transmission and reception of the frequency division multiplexed signal are separately superimposed on the positive half wave and the negative half wave of the power transmission wave. power transmission and signal transmission/reception methods.