JP2002026778A - Power/signal multiplex transmission system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a small-scale and inexpensive power/signal multiplex transmission system that can transmit a high power signal with a signal superimposed on it. SOLUTION: The power/signal multiplex transmission system is provided with switches SW1-SW3, an oscillation circuit 12 that generates AC power with a current specific to an operated switch, when any of the switches SW1-SW3 is operated; transformers 10, 20 that receive and output the AC power; and a smoothing circuit 21 that generates and outputs a signal corresponding to the current of the AC power outputted from the transformers 10, 20 and rectifies and outputs the AC power outputted from the transformers 10, 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power / signal multiplex transmission system for transmitting a signal by superimposing a signal on a power transmission line.

[0002]

2. Description of the Related Art Conventionally, a power / signal multiplex transmission system for transmitting power and transmitting / receiving a signal by superimposing a signal on a power line has been used. As one of such power / signal multiplex transmission systems, a contactless power transmission system using electromagnetic induction is known. For example, Japanese Unexamined Utility Model Publication No. 1-154616 discloses a "contactless power supply device for automobile wiring" as one of the contactless power transmission systems. This non-contact type energizing device for automobile wiring includes a non-contact type energizing part in the middle of the AC wiring provided in the automobile, and the energizing parts are separated from each other and a pair of coils facing each other have ends of the wiring. Connected and configured.

In a non-contact type energizing device for automobile wiring, an AC current is generated when a switch on a transmitting side is turned on, and is transmitted to an AC signal detecting section on a receiving side which is electromagnetically inductively coupled by a coil. The AC signal detection unit detects the transmission frequency of the AC current and notifies the drive unit of the detection.
Further, when there are a plurality of switches on the transmission side, the transmission frequency is changed and notified to the plurality of driving units on the reception side. As a result, the number of lines in the harness can be reduced, the connector can be omitted, and the like, so that the entire apparatus can be simplified, and mounting can be easily performed even in a narrow portion.

As another power / signal multiplex transmission system, Japanese Patent Application Laid-Open No. 60-109340 discloses a "power supply system". In this power supply method, an optical signal obtained by superimposing a DC light on a signal light is transmitted through a transmission system including an optical fiber, and the optical signal transmitted through the transmission system is photoelectrically converted. A current other than the signal current extracted in the step is supplied for driving the apparatus.
As a result, the power can be supplied together with the signal using the transmission line of the optical fiber, and there is no need to provide a power supply on the device side.

[0005]

However, in the non-contact type energizing device for automobile wiring disclosed in Japanese Utility Model Laid-Open Publication No. 1-154616, only one type such as ON and OFF can be controlled at one frequency. When there is a control object, a plurality of AC signal transmitting units and AC signal detecting units are required, and there is a problem that the apparatus becomes large-scale and expensive.

In the power supply system disclosed in Japanese Patent Application Laid-Open No. 60-109340, a signal can be superimposed on electric power. However, since electric power is transmitted using light as a medium,
Parts such as a light emitting element, a light receiving element, and an optical cable are required. In addition, since power is transmitted using light as a medium, the power that can be transmitted is limited, and it is not suitable for applications requiring relatively large power transmission, such as automobiles.

SUMMARY OF THE INVENTION The present invention has been made to solve such problems, and an object of the present invention is to make it possible to transmit a signal by superimposing a signal on relatively large power, and to realize a small-scale and inexpensive. An object of the present invention is to provide a power / signal multiplex transmission system.

[0008]

In order to achieve the above object, according to the present invention, a plurality of switches and a switch operated when any one of the plurality of switches is operated are provided. An oscillation circuit that generates AC power having a unique current, a transformer that inputs and outputs the AC power, and generates and outputs a signal corresponding to the magnitude of the current of the AC power output from the transformer; and And a smoothing circuit for rectifying and outputting the AC power output from the transformer.

According to the first aspect of the present invention, when any one of the plurality of switches is operated, the AC power having a voltage unique to the operated switch is transformed by the transformer (when the voltage is not changed). And the same applies hereinafter). Then, a signal is generated and output according to the magnitude of the current of the output AC power, and the AC power is rectified and output as DC power. Therefore,
A plurality of signals respectively corresponding to the plurality of switches can be transmitted by being superimposed on electric power. In this case, since only one frequency of the AC power is required, the power / signal multiplex transmission system can be configured small-scale and inexpensively, and since light is not used as a medium, a signal is superimposed on relatively large power and transmitted. Can be.

According to a second aspect of the present invention, there is provided an oscillator circuit for generating, when one of the plurality of switches is operated, an AC power having a voltage unique to the operated switch. And a transformer for inputting and outputting the AC power, generating and outputting a signal corresponding to the magnitude of the voltage of the AC power output from the transformer, and rectifying and outputting the AC power output from the transformer. And a smoothing circuit that performs the operation.

According to the second aspect of the present invention, when any one of the plurality of switches is operated, AC power having a voltage specific to the operated switch is transformed by the transformer and output. Then, a signal is generated and output according to the magnitude of the voltage of the output AC power, and the AC power is rectified and output as DC power. Therefore, a plurality of signals respectively corresponding to the plurality of switches can be transmitted while being superimposed on the electric power.
Has the same effects as the invention described in (1).

According to a third aspect of the present invention, there is provided a power supply system comprising: a plurality of switches; an oscillating circuit for generating AC power; a transformer for inputting and outputting the AC power; An actuator for changing the gap of the transformer so as to have a gap unique to the operated switch, and a signal corresponding to the magnitude of the current of the AC power output from the transformer whose gap has been changed by the actuator. And a smoothing circuit for generating and outputting, and rectifying and outputting the AC power output from the transformer.

According to the third aspect of the present invention, when any one of the plurality of switches is operated, the gap of the transformer is changed so as to be a gap specific to the operated switch. In this state, AC power is output from the transformer. Then, a signal is generated and output according to the current of the output AC power, and the AC power is rectified and output as DC power. Therefore, a plurality of signals respectively corresponding to a plurality of switches can be superimposed on electric power and sent to the secondary side. in this case,
In addition to providing the same effect as the first aspect of the present invention, a configuration for generating AC power having a current specific to the operated switch as in the first aspect of the present invention is not required. It is possible to reduce the size and cost of the signal multiplex transmission system.

According to a fourth aspect of the present invention, a plurality of switches, an oscillating circuit for generating AC power, a transformer for inputting / outputting the AC power, and any of the plurality of switches are operated. An actuator that changes the gap of the transformer so as to have a gap specific to the operated switch, and a signal corresponding to the magnitude of the voltage of the AC power output from the transformer whose gap has been changed by the actuator. And a smoothing circuit for generating and outputting, and rectifying and outputting the AC power output from the transformer.

According to the fourth aspect of the invention, when any one of the plurality of switches is operated, the gap of the transformer is changed so as to be a gap specific to the operated switch. In this state, AC power is output from the transformer. Then, a signal is generated and output according to the voltage of the output AC power, and the AC power is rectified and output as DC power. Therefore, a plurality of signals respectively corresponding to the plurality of switches can be superimposed on the electric power and sent to the secondary side, and the same effect as the third aspect of the invention can be obtained.

According to a fifth aspect of the present invention, there is provided a power / signal multiplex transmission system for transmitting AC power generated on a transmission side to a reception side via a transformer, wherein the reception side is configured to transmit the AC power from the transformer. A smoothing circuit for rectifying and outputting the output AC power, a plurality of switches, and when any one of the plurality of switches is operated, a current having a magnitude unique to the operated switch is applied to the transformer. A load setting device for setting a load so as to flow to the secondary side, wherein the transmitting side includes an oscillation circuit that generates AC power to be supplied to the primary side of the transformer, and a current flowing to a secondary side of the transformer. And a current sensor for outputting a signal corresponding to the magnitude of the current flowing to the primary side of the transformer.

According to the fifth aspect of the present invention, when any one of the plurality of switches on the receiving side is operated, the load setting device is set so as to provide a load corresponding to the operated switch. In this state, AC power is output from the transformer. Then, the output AC power is rectified and taken out as DC power. On the other hand, the current sensor outputs a signal corresponding to the magnitude of the current flowing to the primary side of the transformer due to the current flowing to the secondary side of the transformer.
Therefore, power can be transmitted from the transmitting side to the receiving side, and
A signal can be transmitted from the receiving side to the transmitting side. In this case, the same effects as those of the first aspect of the invention can be obtained, and the transmitting side can be controlled from the receiving side, so that the range of application is widened.

According to a sixth aspect of the present invention, there is provided a power / signal multiplex transmission system for transmitting AC power generated on a transmission side to a secondary side via a transformer, wherein the reception side includes the transformer. A smoothing circuit that rectifies and outputs the AC power output from the switch, a plurality of switches, and when any one of the plurality of switches is operated, a voltage having a magnitude unique to the operated switch is applied to the transformer. A load setting device for setting a load so as to be output from the secondary side, wherein the transmitting side includes an oscillation circuit that generates AC power to be supplied to the primary side of the transformer, and an output circuit from the secondary side of the transformer. A voltage sensor that outputs a signal corresponding to the magnitude of the voltage generated on the primary side of the transformer due to the applied voltage.

According to the sixth aspect of the present invention, when any one of the plurality of switches on the receiving side is operated, the load setting device is set to have a load corresponding to the operated switch, In this state, AC power is output from the transformer. Then, the output AC power is rectified and taken out as DC power. On the other hand, the voltage sensor outputs a signal corresponding to the magnitude of the voltage generated on the primary side of the transformer due to the voltage output from the secondary side of the transformer. Therefore, power can be transmitted from the transmission side to the reception side, and a signal can be transmitted from the reception side to the transmission side, so that the same effect as the invention described in claim 5 can be obtained.

According to a seventh aspect of the present invention, there is provided a power / signal multiplex transmission system for transmitting AC power generated on a transmission side to a reception side via a transformer, wherein the reception side is configured to transmit the AC power from the transformer. A smoothing circuit that rectifies and outputs the output AC power, and a plurality of switches that vary the magnitude of the current flowing out of the smoothing circuit, wherein the transmitting side supplies AC power to a primary side of the transformer. And a current sensor that outputs a signal corresponding to the magnitude of the current flowing to the primary side of the transformer due to the magnitude of the current flowing out of the smoothing circuit. .

According to the present invention, AC power from the transmitting side is output from the transformer. And
The output AC power is rectified and output as DC power. In this state, when any of the plurality of switches on the receiving side is operated, a current corresponding to the operated switch flows out of the smoothing circuit. On the other hand, the current sensor outputs a signal corresponding to the magnitude of the current flowing to the primary side of the transformer due to the magnitude of the current flowing out of the smoothing circuit. Therefore, power can be transmitted from the transmission side to the reception side, and a signal can be transmitted from the reception side to the transmission side.
In this case, the same effect as that of the invention described in claim 1 can be obtained, and the load setting device as in the invention described in claim 5 becomes unnecessary, so that the power / signal multiplex transmission system can be reduced in size and cost. Becomes possible.

An eighth aspect of the present invention is a power / signal multiplex transmission system for transmitting AC power generated on a transmitting side to a receiving side via a transformer, wherein the receiving side receives the AC power from the transformer. A smoothing circuit that rectifies and outputs the output AC power, and a plurality of switches that vary the magnitude of the voltage output from the smoothing circuit, wherein the transmitting side supplies an AC voltage to a primary side of the transformer. An oscillation circuit that generates power, and a voltage sensor that outputs a signal corresponding to the magnitude of the voltage generated on the primary side of the transformer due to the magnitude of the voltage output from the smoothing circuit. Features.

According to the eighth aspect of the present invention, the AC power from the transmitting side is output from the transformer. And
The output AC power is rectified and output as DC power. In this state, when any of the plurality of switches on the receiving side is operated, a voltage corresponding to the operated switch is output from the smoothing circuit. On the other hand, the voltage sensor outputs a signal corresponding to the magnitude of the voltage generated on the primary side of the transformer due to the magnitude of the voltage output from the smoothing circuit. Accordingly, power can be transmitted from the transmission side to the reception side, and a signal can be transmitted from the reception side to the transmission side.
An effect similar to that of the seventh aspect is obtained.

[0024]

Embodiments of the present invention will be described below in detail with reference to the drawings. In the following embodiments, the same or corresponding parts will be denoted by the same reference characters and described.

(First Embodiment) FIG. 1 is a block diagram showing a configuration of a power / signal multiplex transmission system according to a first embodiment of the present invention. This power / signal multiplex transmission system includes a primary side and a secondary side. In the first embodiment, the primary side is a power and signal transmitting side, and the secondary side is a power and signal receiving side.

The primary side is a primary coil of a transformer (hereinafter referred to as “primary transformer”) 10, a switch panel 1
1 and an oscillation circuit 12. Oscillation circuit 12
Has a current switching device 13. The secondary side includes a secondary coil (hereinafter, referred to as “secondary transformer”) 20 of a transformer and a smoothing circuit 21. The smoothing circuit 21 has a current sensor 22 and a rectifier 23.

The primary transformer 10 and the secondary transformer 20 are arranged so as to have a predetermined gap, thereby forming a transformer for electromagnetic induction coupling. When an AC power having a predetermined voltage is applied to the primary transformer 10, the secondary transformer 20
It outputs AC power having a voltage proportional to the ratio (turn ratio) between the number of turns of 0 and the number of turns of the secondary transformer 20.

The switch panel 11 includes a plurality of switches S
W1, SW2 and SW3 are provided. Each of the switches SW1 to SW3 outputs a signal indicating that when pressed. The signal output from each of the plurality of switches SW1 to SW3 is supplied to the oscillation circuit 12.

The oscillation circuit 12 generates AC power oscillating at a predetermined frequency. The current switching device 13 included in the oscillating circuit 12 converts the AC power current generated by the oscillating circuit 12 into A according to a signal from the switch panel 11.
Switch to any of [mA], B [mA] and C [mA]. The AC power generated by the oscillation circuit 12 is supplied to the primary transformer 10.

The secondary-side smoothing circuit 21 includes a secondary transformer 2
AC power from 0 is input and smoothed, taken out as DC power, and a signal corresponding to the pressed switch of the switch panel 11 is output.

The current sensor 2 included in the smoothing circuit 21
2 detects the current of the AC power from the secondary transformer 20 and outputs it as any one of A '[mA], B' [mA] and C '[mA] according to the detection result. The AC power from the current sensor 22 is supplied to the rectifier 23.

The rectifier 23 receives the input A '[mA],
The AC power of either B ′ [mA] or C ′ [mA] is smoothed and output as DC power. The rectifier 23
Has output terminals T1, T2 and T3 respectively corresponding to A '[mA], B' [mA] and C '[mA], and outputs an active signal from the output terminal corresponding to the input current. I do.

Next, the operation of the power / signal multiplex transmission system according to the first embodiment thus configured will be described with reference to FIG.
This will be described with reference to FIG. FIG. 2 is a graph showing the electric power shown in FIG.
It is the figure which showed the signal multiplex transmission system functionally. Since power transmission in this power / signal multiplex transmission system is a general technique performed by an electromagnetic induction action of a transformer, the following description focuses on signal transmission.

Now, the switch SW1 of the switch panel 11
Is pressed, a signal to that effect is transmitted to the current switching device 13. Thereby, the current switching device 13
Selects the current A [mA] corresponding to the switch SW1 and supplies it to the primary transformer 10. Thereby, A [mA]
Power is transmitted.

On the secondary side, the current sensor 22 detects the current of the AC power received via the secondary transformer 20. In this case, A ′ [mA] is detected. The detected A '[mA] is output as an active signal from the output terminal T1 via the rectifier 23. Further, the received AC power is distributed by the current sensor 22, and then passes through the rectifier 23, so that the current on the secondary side is stabilized. Therefore, stable electric power is supplied to devices connected to the secondary side. Supply becomes possible.

With the above operation, an active signal can be generated at the output terminal T1 on the secondary side by pressing the switch SW1 of the switch panel 11 on the primary side. By pressing the switches SW2 and SW3 of the switch panel 11 by the same operation, an active signal can be generated at the output terminals T2 and T3 on the secondary side, respectively.

In the above description, a plurality of signals are transmitted by changing the current of the AC power to be transmitted. However, the transformer operates when a predetermined current of the AC power is applied to the primary transformer 10. And secondary transformer 2
0 has the property of outputting AC power having a current inversely proportional to the turns ratio, and can be configured to transmit a plurality of signals by changing the current of the AC power to be transmitted.

In this case, a voltage switching device is used instead of the primary current switching device 13 and the secondary current sensor 2
A voltage sensor is used instead of 2. Then, the voltage switching device selects a voltage corresponding to the pressed switch and supplies the selected voltage to the primary transformer 10. The voltage sensor outputs an active signal from an output terminal corresponding to the detected voltage value.

Next, the electric power according to the first embodiment
An example in which the signal multiplex transmission system is applied to an automobile,
This will be described with reference to FIG. In this example, an instrument panel (hereinafter, abbreviated as “instrument panel”) is used as a primary side, and a meter is used as a secondary side.

Switch panel 11 provided on instrument panel
Has an ODO / TRIP switch and a reset (R
SET) switch is provided. Also, the oscillation circuit 1
Reference numeral 2 denotes an electronic control unit (hereinafter, referred to as “ECU”).
3 are provided. Also, a HOLD signal, ODO / T is output from the rectifier 23 of the smoothing circuit 21 provided in the meter.
The RIP signal and the RESET signal are output and supplied to the display device 30.

The operation of the above configuration will be described. First, when the ODO / TRIP switch of the switch panel 11 provided on the front panel of the instrument panel is pressed, a signal indicating this is transmitted to the current switching device 13 formed inside the ECU 12. As a result, the current switching device 13
A [mA] (switching signal current) corresponding to the DO / TRIP switch is selected and supplied to the primary transformer 10. Thereby, power transmission is performed at A [mA]. Normally, that is, in a state where none of the switches of the switch panel 11 are pressed, power transmission is performed at N [mA].

The smoothing circuit 21 in the meter receives the AC power transformed to A '[mA] by passing through a transformer. The current sensor 22 detects the current of the received AC power. In this case, A '[mA] is detected. The detected A '[mA] is supplied to the power supply unit (not shown) of the meter via the rectifier 23.
The signal passed through the rectifier 23 is supplied to the display device 30 as an ODO / TRIP signal. This OD
In response to the O / TRIP signal, switching between displaying an ODO meter and displaying a TRIP meter is performed.

When a certain period of time has elapsed since the ODO / TRIP switch of the switch panel 11 was pressed, the current switching device 13 selects a current N [mA] indicating that none of the switches has been pressed, and selects the primary current. Supply to transformer 10. Thus, after the elapse of the certain time, N [m
A], power transmission is performed. Thereby, the smoothing circuit 21 in the meter is connected to the N 'through the transformer.
The AC power converted to [mA] is received. The current sensor 22 detects the current of the received AC power. In this case, N ′ [mA] is detected. The detected N '[mA] is supplied to the power supply of the meter via the rectifier 23. The signal passed through the rectifier 23 is HO
It is supplied to the display device 30 as an LD signal. When the HOLD signal is supplied to the display device 30, the display content of the display device 30 does not change.

As described above, according to the power / signal multiplex transmission system according to the first embodiment of the present invention, the frequency of the AC power may be one, so that the power / signal multiplex transmission system is small-scale. In addition, since it can be configured at low cost and does not use light as a medium, a signal can be superimposed on relatively large power and transmitted. In addition, since power and signals can be multiplexed and transmitted by an existing device that does not require a special technique, the number of development steps can be reduced.

(Second Embodiment) The power / signal multiplexing transmission system according to the second embodiment recognizes that the current and the voltage fluctuate depending on the size of the gap between the primary side and the secondary side of the transformer. This is used to distinguish the pressed switch.

FIG. 4 is a block diagram showing a configuration of a power / signal multiplex transmission system according to a second embodiment of the present invention. This power / signal multiplex transmission system includes a primary side and a secondary side. In the second embodiment, the primary side is a power and signal transmitting side, and the secondary side is a power and signal receiving side.

The primary side comprises a primary transformer 10, a switch panel 11, an oscillation circuit 12, and an actuator 15. The oscillation circuit 12 has a control circuit 14. The secondary side includes a secondary transformer 20 and a smoothing circuit 21. The smoothing circuit 21 has a current sensor 22 and a rectifier 23.

The primary transformer 10 and the secondary transformer 20 are arranged so that the gap can be varied, and form a transformer. When a predetermined current of AC power is applied to the primary transformer 10, the transformer
Outputs AC power of a current inversely proportional to the turns ratio.

The switch panel 11 includes a plurality of switches S
W1, SW2 and SW3 are provided. Each of the switches SW1 to SW3 outputs a signal indicating that when pressed. The signal output from each of the plurality of switches SW1 to SW3 is supplied to the oscillation circuit 12.

The oscillation circuit 12 generates AC power oscillating at a predetermined frequency. The AC power generated by the oscillation circuit 12 is supplied to the primary transformer 10. This oscillation circuit 1
2 drives an actuator 15 in accordance with a signal from the switch panel 11. As a result, the primary transformer 10 moves in the direction in which the gap interval changes (the left-right direction in the figure).

The secondary-side smoothing circuit 21 includes a secondary transformer 2
AC power from 0 is input and smoothed, taken out as DC power, and a signal corresponding to the pressed switch of the switch panel 11 is output.

The current sensor 24 included in the smoothing circuit 21
Detects the current of the AC power from the secondary transformer 20,
A [mA], b [mA] and c [mA] according to the detection result
Is output as any of the AC power. This current sensor 2
4 is supplied to the rectifier 23.

The rectifier 23 receives the input a [mA], b
The AC power of either [mA] or c [mA] is smoothed and output as DC power. The rectifier 23 has output terminals T1, T2 and T3 respectively corresponding to the above-mentioned a [mA], b [mA] and c [mA], and active from the output terminal corresponding to the input current. Output a signal.

Next, the operation of the power / signal multiplex transmission system according to the second embodiment thus configured will be described with reference to FIG.
This will be described with reference to FIG. FIG. 5 is a diagram functionally showing the power / signal multiplex transmission system shown in FIG.
Since power transmission in this power / signal multiplex transmission system is a general technique performed by an electromagnetic induction action of a transformer, the following description focuses on signal transmission.

Now, the switch SW1 of the switch panel 11
Is pressed, a signal indicating this is transmitted to the control circuit 14. Thereby, the control circuit 14 drives the actuator 15 to move the secondary transformer 20 to the position “A”. On the other hand, the oscillation circuit 12 supplies AC power having a predetermined frequency, voltage and current to the primary transformer 10.
To supply. Thereby, power transmission of the AC power is performed.

On the secondary side, the current sensor 24 detects the current of the AC power received via the secondary transformer 20. In this case, a [mA] is detected. The detected a [mA] is output as an active signal from the output terminal T1 via the rectifier 23. Also,
After the received AC power is distributed by the current sensor 24, the current on the secondary side is stabilized by passing through the rectifier 23, so that a stable power supply is provided to devices connected to the secondary side. Will be possible.

With the above operation, an active signal can be generated at the output terminal T1 on the secondary side by pressing the switch SW1 of the switch panel 11 on the primary side. By the same operation, when the switch SW2 is pressed, the primary transformer 10 is moved to the position “B” and the current sensor 24 detects b [mA]. Therefore, an active signal is output to the secondary output terminal T2. Is generated. When the switch SW3 is pressed, the primary transformer 10 is moved to the position “C”, and the current sensor 24
Since c [mA] is detected, an active signal is generated at the output terminal T3 on the secondary side.

In the above description, the secondary transformer 2
By detecting a current from 0, the switch pressed on the primary side is determined.
By detecting a voltage from 0, the pressed switch on the primary side may be determined. in this case,
A voltage sensor is used instead of the secondary-side current sensor 24. Then, the voltage sensor outputs an active signal from an output terminal corresponding to the detected voltage value.

Next, the electric power and power according to the second embodiment will be described.
An example in which the signal multiplex transmission system is applied to an automobile,
This will be described with reference to FIG. In this example, a roof ECU is used as a primary side, and a room lamp is used as a secondary side.

The switching lever as the switch panel 11 provided in the roof ECU includes ON, OFF, and DOO.
Three positions of R are provided. A signal indicating the position from the switching lever is supplied to the control circuit 14. The rectifier 23 of the smoothing circuit 21 provided in the room lamp outputs an ON signal,
The DOOR signal and the OFF signal are output and supplied to the lamp 31.

The operation of the above configuration will be described. First, when the switching lever is set to the ON position, a signal indicating this is transmitted from the switching lever to the control circuit 14.
Thereby, the control circuit 14 drives the actuator 15 to move the secondary transformer 20 to the position “A”.
On the other hand, the oscillating circuit 12 supplies AC power of a predetermined frequency, voltage and current to the primary transformer 10. This allows
The power transmission of the AC power is performed.

The current sensor 24 of the smoothing circuit 21 in the room lamp detects the current of the AC power received via the secondary transformer 20. In this case, a [mA] is detected. The detected a [mA] is output as an active signal from the output terminal T1 via the rectifier 23. Note that the received AC power is distributed by the current sensor 24 and then passed through the rectifier 23 to stabilize the current on the secondary side, thereby providing stable power to the lamp 31 connected to the secondary side. Supply.

As described above, according to the power / signal multiplex transmission system according to the second embodiment of the present invention, the size of the system can be reduced by simplifying the device on the primary side.
The price can be reduced.

(Third Embodiment) In the power / signal multiplex transmission system according to the third embodiment, a signal is transmitted from a power receiving side by reversing a signal transmission direction to a power transmission direction. This makes it possible to control the side.

FIG. 7 is a block diagram showing a configuration of a power / signal multiplex transmission system according to the third embodiment of the present invention. This power / signal multiplex transmission system includes a primary side and a secondary side. In the third embodiment, the primary side is a power transmitting side and a signal receiving side, and the secondary side is a power receiving side and a signal transmitting side.

The primary side comprises a primary transformer 10 and an oscillation circuit 12. The oscillation circuit 12 is a current sensor 1
6. The secondary side is a secondary transformer 20,
It comprises a smoothing circuit 21 and a switch panel 26. The smoothing circuit 21 includes a load setting device 25 and a rectifier 23.
have.

The primary transformer 10 and the secondary transformer 20 are arranged so as to have a predetermined gap, and form a transformer. When a predetermined current of AC power is applied to the primary transformer 10, the transformer
Outputs AC power of a current inversely proportional to the turns ratio.

The oscillation circuit 12 generates AC power oscillating at a predetermined frequency. A current sensor 16 included in the oscillation circuit 12 detects a current of AC power flowing through the primary transformer 20. This current sensor 16 outputs a current A ′ [m
A], B ′ [mA], and C ′ [mA] are provided with output terminals T1, T2, and T3, respectively, and output an active signal from the output terminal corresponding to the detected current.

The secondary-side smoothing circuit 21 includes a secondary transformer 2
AC power from 0 is input, smoothed, and taken out as DC power. Further, it outputs a signal corresponding to the pressed switch of the switch panel 26 to control the load current value.

The load setting device 25 included in the smoothing circuit 21 detects that the current of the AC power from the secondary transformer 20 is set to A when the switch SW1 of the switch panel 11 is pressed.
[MA], when switch SW2 is pressed, B [m
A] and C [mA] when the switch SW3 is pressed.
Adjust so that The rectifier 23 is a secondary transformer 2
The AC power transmitted from 0 through the load setting device 25 is rectified and taken out as DC power.

The switch panel 26 includes a plurality of switches S
W1, SW2 and SW3 are provided. Each of the switches SW1 to SW3 outputs a signal indicating that when pressed. The signal output from each of the switches SW1 to SW3 is supplied to the load setting device 25 via the rectifier 23.

Next, the operation of the power / signal multiplex transmission system according to the third embodiment thus configured will be described with reference to FIG.
This will be described with reference to FIG. FIG. 8 is a diagram functionally showing the power / signal multiplex transmission system shown in FIG.
Since power transmission in this power / signal multiplex transmission system is a general technique performed by an electromagnetic induction action of a transformer, the following description focuses on signal transmission.

Now, the switch SW1 of the switch panel 26
Is pressed, a signal to that effect is transmitted from the switch panel 26 to the load setting device 25. Thus, the load setting device 25 sets the current A [mA] corresponding to the switch SW1 to flow to the secondary transformer 20.

On the primary side, the current sensor 16 is connected to the primary transformer 1 that fluctuates according to the current of the secondary transformer 20.
The current flowing through 0 is detected. In this case, A ′ [mA]
Is detected. The detected A '[mA] is output from the output terminal T1 as an active signal. In addition,
Since the AC power received on the secondary side passes through the rectifier 23, the current on the secondary side is stabilized, so that it is possible to supply power stably to devices connected to the secondary side.

With the above operation, an active signal can be generated at the primary output terminal T1 by pressing the switch SW1 of the secondary switch panel 26. By pressing the switches SW2 and SW3 of the switch panel 26 by the same operation, an active signal can be generated at each of the primary output terminals T2 and T3.

Next, according to the third embodiment,
An example in which the signal multiplex transmission system is applied to an automobile,
This will be described with reference to FIG. In this example, an instrument panel is used as a primary side, and a steering is used as a secondary side.

The ECU 32 provided on the instrument panel receives an UP ′ signal, a HOL signal from the current sensor 16 in the oscillation circuit 12.
D 'and DOWN' signals are provided. In addition, a shift switch (shift SW) as a switch panel 26 provided on the steering is provided according to the setting thereof.
Any of the UP signal, the HOLD signal, and the DOWN signal is output and supplied to the load setting device 25 in the smoothing circuit 21.

The operation of the above configuration will be described. First, when the shift switch mounted on the steering wheel is set to UP, an UP signal indicating this is supplied from the switch panel 11 to the load setting device 25 in the smoothing circuit 21. Thus, the load setting device 25 is connected to the secondary transformer 2
It is adjusted so that a current of A [mA] (current for an UP signal) flows to 0. In a normal state, that is, in a state where the shift switch is set to HOLD, the current is set to flow N [mA].

Thus, the oscillation circuit 12 in the instrument panel
Is set so that a current of A ′ [mA] flows through the primary transformer. The current sensor 16 of the oscillation circuit 12 detects this current and outputs an UP 'signal. With this, the ECU
No. 32 recognizes that the shift switch has been set to UP.

As described above, according to the power / signal multiplex transmission system according to the third embodiment of the present invention, the power / signal multiplex transmission system according to the first and second embodiments described above is provided. , While the secondary side can be controlled from the primary side, the primary side can be controlled from the secondary side.

In the third embodiment, a plurality of signals are transmitted from the secondary side to the primary side by adjusting the current of the transmitted AC power by the load setting device 25. When AC power having a predetermined voltage is applied to the primary transformer 10, the secondary transformer 20
Utilizing the property of outputting AC power having a voltage proportional to the turns ratio, it can be modified to transmit a plurality of signals by adjusting the voltage of the transmitted AC power.

(Fourth Embodiment) The power / signal multiplex transmission system according to the fourth embodiment is similar to the third embodiment described above.
In the above embodiment, the switch panel is constituted by resistors.

FIG. 10 is a block diagram showing a configuration of a power / signal multiplex transmission system according to the fourth embodiment of the present invention. This power / signal multiplex transmission system includes a primary side and a secondary side. In the fourth embodiment, the primary side is a power transmitting side and a signal receiving side, and the secondary side is a power receiving side and a signal transmitting side.

The structure of the primary side is the same as that of the third embodiment. The secondary side includes a secondary transformer 20, a smoothing circuit 21, and a switch panel 27. The smoothing circuit 21 has a rectifier 23. The rectifier 23 included in the secondary-side smoothing circuit 21 receives and smoothes the AC power from the secondary transformer 20 and extracts the DC power.

The switch panel 27 includes a plurality of switches S
It is composed of W1, SW2 and SW3. One end of the switch SW1 is connected to the rectifier 23 via the resistor R1, and the other end is grounded. One end of the switch SW2 is connected to the rectifier 23 via the resistors R1 and R2, and the other end is grounded. One end of the switch SW3 is connected to the resistors R1, R
2 and R3 are connected to the rectifier 23, and the other end is grounded.

Next, the operation of the power / signal multiplex transmission system according to the fourth embodiment configured as described above will be described. Since power transmission in this power / signal multiplex transmission system is a general technique performed by an electromagnetic induction action of a transformer, the following description focuses on signal transmission.

Now, the switch SW1 of the switch panel 27
Is turned on, the current from the rectifier 23 flows to the ground via the switch SW1. In this case, the current A [m corresponding to the switch SW1 is supplied to the secondary transformer 20.
A] is set such that the resistance value of the resistor R1 flows.

On the primary side, the current sensor 16 detects a current flowing through the primary transformer 10 that fluctuates according to a current fluctuation of the secondary transformer 20. In this case, A '[m
A] is detected. As a result of this detection, an active signal is output from the output terminal T1. Note that the AC power received on the secondary side passes through the rectifier 23, so that the current on the secondary side is stabilized, so that a stable power supply can be provided to devices connected to the secondary side. .

By the above operation, by turning on the switch SW1 of the secondary-side switch panel 26, an active signal can be generated at the primary-side output terminal T1. By the same operation, when the switch SW2 of the switch panel 27 is turned on, a current flows from the rectifier 23 to the ground via the resistors R1 and R2, so that the current sensor 16 detects b ′ [mA], An active signal is generated at the primary output terminal T2. When the switch SW3 of the switch panel 27 is turned on, the rectifier 23 outputs the resistors R1, R2 and R3.
Current flows to the ground via the
Detects c ′ [mA], and an active signal is generated at an output terminal T3 on the primary side.

Next, according to the fourth embodiment,
An example in which the signal multiplex transmission system is applied to an automobile,
This will be described with reference to FIG. In this example, an instrument panel is used as a primary side, and a steering is used as a secondary side.

The ECU 32 provided in the instrument panel receives an UP 'signal from the current sensor 16 in the oscillation circuit 12 and a HOL signal.
D 'and DOWN' signals are provided. In addition, a current from the rectifier 23 flows to the ground from a shift switch (shift SW) as a switch panel 27 provided on the steering via a resistor having a different resistance value according to the setting.

The operation of the above configuration will be described. First, when the shift switch mounted on the steering wheel is set to UP, the switch SW1 is turned on, and the rectifier 23
The current flows through the resistor R1 to the ground. As a result, a current of A [mA] (UP signal current) flows through the secondary transformer 20. Normally, that is, when the shift switch is set to HOLD, the current is set so as not to flow.

Thus, the oscillation circuit 12 in the instrument panel
Is set so that the current of A ′ [mA] flows through the primary transformer. The current sensor 16 of the oscillation circuit 12 detects this current and outputs an UP 'signal. Thereby, the ECU 3
2 recognizes that the shift switch has been set to UP.

As described above, according to the power / signal multiplex transmission system according to the fourth embodiment of the present invention, similarly to the above-described third embodiment, control of the primary side from the secondary side is performed. It becomes possible to do. Further, unlike the third embodiment, there is no need to provide a load setting device, so that there is an advantage that the circuit configuration is simplified.

[0095]

According to the first aspect of the present invention, when any one of the plurality of switches is operated, AC power having a current specific to the operated switch is transformed by the transformer and output, and A signal is generated and output according to the magnitude of the current of the output AC power, and the AC power is rectified and output as DC power, so that a plurality of signals respectively corresponding to the plurality of switches are output. It can be transmitted by being superimposed on electric power. In this case, since only one frequency of the AC power is required, the power / signal multiplex transmission system can be configured small-scale and inexpensively, and since light is not used as a medium, a signal is superimposed on relatively large power and transmitted. Can be.

According to the second aspect of the present invention, when any one of the plurality of switches is operated, AC power having a voltage specific to the operated switch is transformed by the transformer and output. A signal is generated and output according to the magnitude of the voltage of the output AC power, and the AC power is rectified and output as DC power.
A plurality of signals respectively corresponding to the plurality of switches can be transmitted while being superimposed on the electric power, and the same effect as that of the first aspect can be obtained.

According to the third aspect of the invention, when any one of the plurality of switches is operated, the gap of the transformer is changed so as to be a gap unique to the operated switch. In this state, the AC power is output from the transformer, a signal is generated and output according to the current of the output AC power, and the AC power is rectified and output as DC power. Therefore, a plurality of signals respectively corresponding to the plurality of switches can be superimposed on the electric power and sent to the secondary side, so that the same effect as that of the first aspect of the invention can be obtained, and the first aspect of the invention. This eliminates the need for a configuration for generating AC power having a current specific to the operated switch as described above, and makes it possible to reduce the size and cost of the power / signal multiplex transmission system.

According to the fourth aspect of the present invention, when any one of the plurality of switches is operated, the gap of the transformer is changed so as to be a gap specific to the operated switch. In this state, AC power is output from the transformer. Then, a signal is generated and output in accordance with the voltage of the output AC power, and the AC power is rectified and output as DC power. , And can be sent to the secondary side, and the same effect as that of the invention described in claim 3 can be obtained.

According to the fifth aspect of the present invention, when any one of the plurality of switches on the receiving side is operated, the load setting device is set so as to provide a load corresponding to the operated switch. In this state, AC power is output from the transformer, and the output AC power is rectified and taken out as DC power. On the other hand, the current sensor outputs a signal corresponding to the magnitude of the current flowing to the primary side of the transformer due to the current flowing to the secondary side of the transformer. Therefore,
The power can be transmitted from the transmission side to the reception side, and a signal can be transmitted from the reception side to the transmission side.
In addition to the effects similar to those of the invention described in (1), since the transmitting side can be controlled from the receiving side, the application range is widened.

According to the present invention, when any one of the plurality of switches on the receiving side is operated, the load setting device is set so as to provide a load corresponding to the operated switch. In this state, AC power is output from the transformer. Then, the output AC power is rectified and taken out as DC power. On the other hand, the voltage sensor outputs a signal corresponding to the magnitude of the voltage generated on the primary side of the transformer due to the voltage output from the secondary side of the transformer, so that power is transmitted from the transmission side to the reception side. Can transmit signals from the receiving side to the transmitting side,
An effect similar to that of the fifth aspect is obtained.

According to the seventh aspect of the present invention, the AC power from the transmitting side is output from the transformer, and the output AC power is rectified and output as DC power. In this state, when any of the plurality of switches on the receiving side is operated, a current corresponding to the operated switch flows out of the smoothing circuit. On the other hand, the current sensor outputs a signal corresponding to the magnitude of the current flowing to the primary side of the transformer due to the magnitude of the current flowing out of the smoothing circuit. Therefore, the power can be transmitted from the transmission side to the reception side, and the signal can be transmitted from the reception side to the transmission side, so that the same effects as those of the first aspect can be obtained, and the fifth aspect can be achieved. Since load setting equipment like the invention is not required,
The power and signal multiplex transmission system can be reduced in size and cost.

According to the present invention, AC power from the transmitting side is output from the transformer, and the output AC power is rectified and output as DC power. In this state, when any of the plurality of switches on the receiving side is operated, a voltage corresponding to the operated switch flows out of the smoothing circuit. On the other hand, the voltage sensor outputs a signal corresponding to the magnitude of the voltage generated on the primary side of the transformer due to the magnitude of the voltage flowing out of the smoothing circuit. Therefore, the power can be transmitted from the transmission side to the reception side, and the signal can be transmitted from the reception side to the transmission side.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a power / signal multiplex transmission system according to a first embodiment of the present invention.

FIG. 2 is a diagram functionally showing the power / signal multiplex transmission system shown in FIG. 1;

FIG. 3 is a diagram for explaining an example in which the power / signal multiplex transmission system according to the first embodiment of the present invention is applied to an automobile.

FIG. 4 is a block diagram illustrating a configuration of a power / signal multiplex transmission system according to a second embodiment of the present invention.

FIG. 5 is a diagram functionally showing the power / signal multiplex transmission system shown in FIG. 4;

FIG. 6 is a diagram for explaining an example in which a power / signal multiplex transmission system according to a second embodiment of the present invention is applied to an automobile.

FIG. 7 is a block diagram illustrating a configuration of a power / signal multiplex transmission system according to a third embodiment of the present invention.

FIG. 8 is a diagram functionally showing the power / signal multiplex transmission system shown in FIG. 4;

FIG. 9 is a diagram for explaining an example in which a power / signal multiplex transmission system according to a third embodiment of the present invention is applied to an automobile.

FIG. 10 is a block diagram showing a configuration of a power / signal multiplex transmission system according to a fourth embodiment of the present invention.

FIG. 11 is a diagram for describing an example in which a power / signal multiplex transmission system according to a fourth embodiment of the present invention is applied to an automobile.

[Explanation of symbols]

 Reference Signs List 10 Primary transformer 11 Switch panel 12 Oscillation circuit 13 Current switching device 14 Control circuit 15 Actuator 16, 22, 24 Current sensor 17 Voltage sensor 20 Secondary transformer 21 Smoothing circuit 23 Rectifier 25 Load setting device 26, 27 Switch panel 30 Display device 31 Lamp 32 ECU

Claims (8)

[Claims] A plurality of switches; an oscillating circuit for generating AC power having a current specific to the operated switch when one of the plurality of switches is operated; and inputting / outputting the AC power. A transformer, and a smoothing circuit that generates and outputs a signal corresponding to the magnitude of the AC power output from the transformer, and rectifies and outputs the AC power output from the transformer. Power / signal multiplex transmission system characterized by the above-mentioned. A plurality of switches; an oscillating circuit for generating AC power having a voltage specific to the operated switch when any one of the plurality of switches is operated; and inputting / outputting the AC power. A transformer, and a smoothing circuit that generates and outputs a signal corresponding to the magnitude of the voltage of the AC power output from the transformer, and rectifies and outputs the AC power output from the transformer. Power / signal multiplex transmission system characterized by the above-mentioned. A plurality of switches; an oscillation circuit for generating AC power; a transformer for inputting and outputting the AC power; and when any one of the plurality of switches is operated, a specific operation of the operated switch is performed. An actuator for changing a gap of the transformer so as to form a gap, a signal corresponding to a magnitude of a current of AC power output from the transformer whose gap has been changed by the actuator, and generating and outputting the signal; And a smoothing circuit for rectifying and outputting the AC power output from the power / signal multiplexing system. A plurality of switches; an oscillation circuit for generating AC power; a transformer for inputting and outputting the AC power; and when any one of the plurality of switches is operated, a specific operation of the operated switch is performed. An actuator for changing a gap of the transformer so as to form a gap, and a signal corresponding to the magnitude of the voltage of the AC power output from the transformer, the gap of which is changed by the actuator; And a smoothing circuit for rectifying and outputting the AC power output from the power / signal multiplexing system. 5. A power / signal multiplex transmission system for transmitting AC power generated at a transmission side to a reception side via a transformer, wherein the reception side rectifies the AC power output from the transformer. An output smoothing circuit, a plurality of switches, and a load set so that when any one of the plurality of switches is operated, a current having a magnitude unique to the operated switch flows to the secondary side of the transformer. A transmission setting side, wherein the transmitting side generates an AC power to be supplied to a primary side of the transformer, and an oscillation circuit which flows to a primary side of the transformer due to a current flowing to a secondary side of the transformer. And a current sensor that outputs a signal corresponding to the magnitude of the current.
Signal multiplex transmission system. 6. A power / signal multiplex transmission system for transmitting AC power generated on a transmission side to a secondary side via a transformer, wherein the reception side rectifies the AC power output from the transformer. And a plurality of switches. When any of the plurality of switches is operated, a voltage having a magnitude unique to the operated switch is output from the secondary side of the transformer. A load setting device for setting a load on the transmission side, the transmission side includes an oscillation circuit that generates AC power to be supplied to a primary side of the transformer, and a voltage output from a secondary side of the transformer. And a voltage sensor for outputting a signal corresponding to the magnitude of the voltage generated on the primary side of the transformer. 7. A power / signal multiplex transmission system for transmitting AC power generated at a transmission side to a reception side via a transformer, wherein the reception side rectifies the AC power output from the transformer. A smoothing circuit for outputting, and a plurality of switches for changing a magnitude of a current flowing out of the smoothing circuit, wherein the transmitting side generates an AC power to be supplied to a primary side of the transformer; And a current sensor for outputting a signal corresponding to the magnitude of the current flowing to the primary side of the transformer due to the magnitude of the current flowing out of the circuit. 8. A power / signal multiplex transmission system for transmitting AC power generated on a transmission side to a reception side via a transformer, wherein the reception side rectifies the AC power output from the transformer. A smoothing circuit for outputting, and a plurality of switches for changing the magnitude of the voltage output from the smoothing circuit; the transmitting side; an oscillation circuit for generating AC power to be supplied to a primary side of the transformer; Power / signal multiplex transmission, comprising: a voltage sensor that outputs a signal corresponding to the magnitude of the voltage generated on the primary side of the transformer due to the magnitude of the voltage output from the smoothing circuit. system.