JPH10293826A - Power and information non-contact transmitting device provided with link head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To continue the transmitting action of a non-contact transmitting device even when a mobile part of a machine device varies its relative position relation to a fixed part by applying the combinations of plural power receiving heads which are linked with each other. SOLUTION: A power transmitting head 1 placed at a fixed part of a machine device consists of a coil 6-1 and a capacitor 5-1, i.e., the primary elements. Meanwhile, a power receiving head 2 placed at a mobile part of the machine device primarily consists of a coil 6-2 and a capacitor 5-2. A head 10 of such a constitution and its equivalent heads 11, 12, etc., are linearly aligned at each prescribed space. When each of heads 10 to 12, etc., of the head 2 of the mobile part has the linear reciprocating movements with large strokes, one of these heads is always set opposite to the head 1 of the fixed part. As a result, a prescribed transmitting action is continued.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for transmitting a digital signal or an analog signal in a non-contact manner using electromagnetic waves, and more particularly to a device having a fixed body and a mobile body, for example, a traffic equipment, a vehicle, and a machine. In machines, robotic devices, communication and transport devices, and various other automatic machines, the mobile side module is mounted on the moving body, the fixed side module is mounted on the device body, and digital signals or digitized data signals that you want to transmit from the mobile side or The present invention relates to a device for transmitting an information signal of an analog signal (for example, shape, position, distortion, pressure, sound, temperature, color, etc.) to a fixed side in a non-contact manner.

[0002] The present invention relates to an electronic apparatus having a fixed body and a moving body, in which the fixed body and the moving body mutually transmit and receive digital signal and analog signal information using electromagnetic waves as a medium without contacting each other. The present invention relates to a signal transmission device that supplies power by contact.

[0003]

2. Description of the Related Art In a signal transmission apparatus for transmitting a contactless radio wave of this kind,
Conventionally, a circular or square cross section has been generally used as a cross-sectional shape of an opposing portion of a transmission head and a reception head which directly control transmission of power and information signals. For this reason, when the power consumption of the moving-side module is constant, the distance that can be transmitted from the head is determined mainly by the performance of the coil with a magnetic core and the air-core coil related to power transmission.

[0004] Therefore, in such non-contact transmission,
The maximum efficiency is obtained only when both heads face each other in the specified specific positional relationship, and if they deviate even slightly from that position, the power transmission efficiency is extremely reduced.

[0005] In particular, in a mechanism in which the moving part and the fixed part are largely close to or separated from each other in a straight line or a curved line, there is a state where both heads do not face each other. Can not. Therefore, at present, transmission is performed only at a specific opposing position specified in advance, and the other position must be blind.

However, regarding the exchange of information signals only,
Since the transmission power can be very small, the antenna of the moving part and the fixed part always tries to transmit and receive continuously continuously.
There is an information transmission device disclosed in Japanese Patent Application Laid-Open No. 60-21640.

[0007] The present invention has been made in view of the above points, and a relative positional relationship between a mobile-side module and a fixed-side module for transmitting electric power and an information signal in a non-contact manner by electromagnetic waves. It is an object of the present invention to provide a transmission device which retains the operating power even when the signal fluctuates to some extent and allows the information signal to be continuously transmitted.

When information signals are transmitted and received between a fixed side and a movable side of an electronic device in a non-contact manner by electromagnetic waves, a system in which a power supply for operating an electronic circuit on the movable side is connected by a lead wire or a sliding contact is applied. Have been.

There is also a method of supplying electric power to the moving side by an electromagnetic coupling method. However, in non-contact transmission between the opposing heads by a pair of electromagnetic coils, a transferable transmission distance is limited.

The maximum power transmission efficiency can be obtained only when both heads face each other in a specified specific positional relationship, and if they deviate even slightly from that position, the transmission efficiency will be extremely reduced. .

In particular, in the case of a mechanism in which the distance between the moving side and the fixed side is large, a state where the two power transmission heads do not face each other may occur, or normal electromagnetic coupling may not be performed. In some cases, the power supply to the mobile side is hindered, and continuous transmission of the information signal cannot be performed.

With respect to the transmission and reception of only information signals performed between the mobile side and the fixed side at a distance, an information transmission apparatus described in Japanese Patent Application Laid-Open No. 60-21640, which attempts to continuously transmit and receive information signals using an antenna, has been proposed. is there.

[0013] It is an object of the present invention to provide a signal transmission device configured to transmit electric power and information signals from one of a mobile module and a fixed module to the other by electromagnetic waves in a non-contact manner, and to install a mechanical device. It is an object of the present invention to provide a non-contact transmission device capable of continuing the transmission operation even when the moving body changes its relative positional relationship with the fixed body to some extent.

[0014]

SUMMARY OF THE INVENTION A non-contact power and information transmission apparatus provided with an interlocking head according to the present invention transmits power required for operation of a mobile module from a fixed module opposed thereto at a short distance. A function and a function of transmitting and receiving an information signal between the two modules, a signal transmission device that operates using an electromagnetic wave as a medium when a transmission head and a reception head provided in each of the modules face each other, The power receiving head is constituted by a combination of a plurality of heads linked to each other, and the information signal transmitting heads are respectively mounted near the heads.

Also, a characteristic feature is that a plurality of linking heads are linearly or planarly arranged at predetermined intervals to constitute a power receiving head. Also, each of the opposing heads including the coordinating head that controls transmission and reception of power and information signals is configured with a coil and a capacitor as main elements.
In addition, the power receiving head further comprises a coil and a capacitor as main elements, and the transmitting head and the receiving head for transmitting and receiving information signals can be formed as a shortened antenna having a loading coil as a main element.

Further, by inserting rectifiers in series at the output sides of a plurality of heads in which power receiving heads are linked to each other, it is possible to prevent current from flowing to heads other than the head receiving power. And a non-contact transmission device configured to combine respective outputs.

In particular, by limiting the interval between the modules to a short distance, the ratio between the required power for power transmission and the input power of the receiving system is reduced, so that the transmission system for power transmission and the signal transmission are reduced. And at the same time, they are mounted on the same module or the same head in order to simplify and miniaturize the handling.

The non-contact transmission device of the present invention has a mechanism in which electric power required for operation of the mobile module is supplied from the fixed module by electromagnetic waves in a non-contact manner. Then, the fixed-side module is operated by a commercial power supply or another power supply. Further, the signal transmission system of the non-contact transmission device of the present invention can be applied to either one-way or two-way transmission between both modules.

However, the induction disturbance from the power transmission system to the signal-related reception system for wirelessly transmitting the power of the mobile module is a serious problem. That is, an output of several watts or more is required in order to transmit electric power enough to supply the operating power of the mobile module from the fixed module in a non-contact manner.

On the other hand, since the required receiving power of the receiving system is on the order of microwatts, the power ratio between them becomes as much as 10,000 to 100,000 or more, and as in the present invention, both are located in or near the same module. If incorporated, guidance from the power transmission system to the reception system becomes an obstacle.

However, since the power ratio is proportional to the distance between the modules, if the distance between the modules is small, the transmission power may be small, and the receiving sensitivity may be low. The induction to the small.

In the present invention, this problem has been solved and practical use has been made possible by suppressing the distance between modules to the minimum necessary (for example, about 5 to 10 mm).

In order to achieve the above object, the present invention comprises a moving-side module and a fixed-side module, and the transmitting-side module and the receiving-side head provided on both of the modules face each other with a gap therebetween when the moving-side module is mounted. A non-contact transmission of power required for the operation from the fixed-side module using an electromagnetic wave as a medium, and a signal transmission device having a function of transmitting and receiving information signals between the two modules in a non-contact manner. The power required for the operation is such that the power receiving head of the mobile module and the power transmitting head belonging to the fixed module each formed using an electromagnetic coil contact the power carrier in a non-contact manner during an electromagnetic coupling period in which the power receiving head is in close proximity to each other. Contactless transmission of power and information, characterized in that it is transmitted and rectified and smoothed. It is intended to provide location, a.

That is, the non-contact information and power transmission apparatus according to the present invention includes a mobile module and a fixed module, and the transmission and reception of information signals between both modules is performed via an antenna for transmission and reception using electromagnetic waves as a medium. Are performed without contact with each other.

The transfer-side module has a function of transmitting a modulated signal wave obtained by modulating a signal carrier in accordance with an external input signal. The fixed-side module that operates on the commercial power supply is a signal transmission device having a processing function of demodulating the received modulated signal wave and outputting the demodulated signal wave to an external device as an information signal.

The power required for the operation of the mobile module is determined by the electromagnetic coupling period in which the power receiving head of the mobile module and the power transmitting head belonging to the fixed module, each of which is constituted by using an electromagnetic coil, are in close proximity to each other. In addition, the power carrier is transmitted in a non-contact manner and rectified and smoothed so as to be obtained.

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the embodiments of the present invention described below, power is transmitted from a fixed module to a mobile module and information signals are transmitted from the mobile module to the fixed module for simplification of description. The case of unidirectional transmission for transmission will be described.

The main functions of the fixed-side module A in FIG. 1 are to transmit the power required for the operation of the mobile-side module B from the power transmission head 1 using the power carrier f1 as a medium, and to transmit from the mobile-side module B FM that has been
(Frequency modulation) A signal wave is received by the signal receiving head 4, demodulated, and output to the outside as a signal output Do.

On the other hand, the main functions of the mobile module B are as follows.
The power transmitted by the power carrier f1 from the fixed-side module A is received by the power receiving head 2, and after rectification and smoothing, the power is supplied as the operating power of each unit. The frequency of the signal carrier f2 is modulated by the input signal Di. And then propagate the signal toward the fixed module A by the signal transmission head 3.

The opposing heads of the power transmitting head 1 and the power receiving head 2 and the signal transmitting head 3 and the signal receiving head 4 can use various types of heads. Basically, as shown in FIG. In many cases, a coil 6 in which coils 5 are connected in parallel is used.

The basic configuration of the opposing head in the present invention is as follows. For example, in the case of power transmission, coils 6-1 and 6-2 are wound around magnetic cores 7-1 and 7-2, respectively, as shown in FIG. The capacitors 5-1 and 5-2 are connected in parallel and tuned. One of them is used as a power transmitting head 1 and the other is used as a power receiving head 2 so as to face each other.

As for the opposing head for information signals,
If the transmission frequency is selected to be high, an open type such as a general antenna can be applied instead of a closed type such as a coil. However, when the transmission distance between the two modules is relatively short as described above, the gain is not a problem, and therefore, it is not necessary to use an antenna having a length that is an integral multiple of the normally used quarter wavelength. Therefore, as a basic configuration of two pairs of opposing heads that simultaneously transmit power and an information signal, an antenna 9 to which a loading coil 8 for shortening an antenna for transmitting an information signal is added as shown in FIG. -3, 9-4 are used.

That is, the fixed module A is equipped with an antenna 9-4 of the signal receiving head 4 near the coil 6-1 of the power transmitting head 1. Similarly, the moving-side module B is equipped with the antenna 9-3 of the signal transmission head 3 near the coil 6-2 of the power reception head 2 to constitute two pairs of opposing heads. In such a case, as shown in FIG. 4, even if the shape of the power transmission head 1 is smaller than that of the power reception head 2, it is usual that the power transmission head 1 is designed to sufficiently achieve the purpose of transmission. Further, the outer shape and cross-sectional shape of the magnetic core 7 are not necessarily limited to the rectangular parallelepiped shape as illustrated.

In the non-contact transmission device of the present invention, as shown in FIG. 5, for example, the power transmission head 1 mounted on a fixed portion of a mechanical device includes one coil 6-1 and one capacitor 5-1. It is configured as the main element. Each of the power receiving heads 2 mounted on the moving unit has a coil 6-2.
1 composed mainly of a capacitor and a capacitor 5-2
A plurality of zeros and equivalent heads 11 and 12 are linearly arranged at predetermined intervals.

When each of the heads 10 to 12 of the power receiving head 2 mounted on the moving part reciprocates linearly with a large stroke, any one of the heads is always connected to the power transmitting head 1 of the fixed part. They are opposed to each other. Therefore, the predetermined transmission operation is continuously performed.

In FIG. 6, the high-frequency output transmitted from the power transmission head 1 composed of the coil 6-1 and the capacitor 5-1 is supplied to the capacitors corresponding to the coils 6-2, 6-3, 6-4, etc. A plurality of heads including 5-2, 5-3, 5-4, etc. are received by the power receiving head 2 configured in cooperation. This received power is used as a power source for the operation circuit of the mobile module.

However, in principle, power transmission is performed only in a plurality of power receiving heads 2 which are opposed to the power transmitting head 1 among a plurality of power receiving heads 2. In this case, it is sufficient that all the heads always resonate with the power carrier f1 (in the case of parallel tuning, the impedance at the frequency becomes infinite). The resonance frequency deviates due to the mutual inductance between the two heads. Therefore, in order to improve the power transmission efficiency, it is necessary to set a head that is actually involved in transmission, that is, a head facing the power transmission head 1 so as to resonate with the power carrier f1. .

Therefore, the resonance frequency of the head not facing the power transmission head 1 is shifted from the power carrier f1, and the impedance at the frequency is reduced. It also affects the resonance of the head involved in transmission. In such a case, by connecting the rectifier 13 to a plurality of linking heads as shown in FIG. 6 and rectifying the induced high-frequency waves to convert them into direct current and then combining them, the above-mentioned adverse effects can be reduced and The effect of preventing a so-called current sneak phenomenon in which the received power is short-circuited by the resistance of the coil which is not related to the resonance of the receiving head can be brought about.

In the above embodiment, a plurality of heads are arranged linearly at predetermined intervals, and electrically connected in parallel. However, even when a plurality of heads are arranged in a curved line, or in a plane or three-dimensional arrangement, at least one of these heads faces the other head. With such settings, the operation and effect are exactly the same as described above. The heads may be electrically connected in series, or may be connected in a matrix.

In the above embodiment, the configuration of the opposing head for power transmission has been mainly described. However, the opposing head for information signal transmission is not limited to the coil for signal transmission together with the coil for power transmission and the magnetic core. Can be wound. The signal-to-noise ratio can be increased by using measures such as selecting frequencies related to power transmission and signal transmission and improving the sensitivity and selectivity of the signal receiving system.

As described above, when an antenna is applied as an opposing head for transmitting information signals, in a power receiving head in which a plurality of heads are combined as described above, the antenna is connected to a coil for power transmission. For example, the antenna may be integrated by winding it around a core, or installed near each power transmission head, or provided with an antenna that works across each power transmission head. However,
When an electromagnetic wave having a frequency enough to use an antenna is used for an information signal transmission system, a wide range can be covered. Therefore, a large number of receiving heads may be covered with one or several pairs of antennas.

The configuration example shown in FIG. 7 is different from the signal transmission antenna 14 and the loading coil 8 provided for each head.
In this embodiment, a power supply process is performed using a coaxial cable 16 from a branching unit 15 connected to an output terminal for a signal carrier f2 of a mobile module B. Further, in the system shown in FIG. 8, the signal transmitting antenna 14 is of a folded dipole type as shown in the figure.

For the purpose of improving the effect on the power transmission side and reducing unnecessary high-frequency radiation, power is not supplied to a plurality of power transmission heads on average, and for example, a light source such as an LED is mounted on the power reception head. A light receiving element such as a phototransistor is installed in each of the plurality of power transmission heads, and the output thereof is applied to a power multiplexer, thereby opposing the power reception head from the plurality of power transmission heads. It is also possible to detect what is being done and supply power only to the head by applying a conventional technique.

In the above embodiment, the power transmission head 1
Since the relationship between the power receiving head 2 and the power receiving head 2 is globally reversible, it goes without saying that the relationship may be reversed. Also, of the two modules, A is the fixed side,
Although B has been described as the moving side, both may be the fixed side or the moving side. In addition, although the FM modulation method is used as the modulation method in the above embodiment, it is obvious that various modulation methods used for ordinary wireless communication can be almost applied in the present invention.

In the embodiment of the present invention described below, for the sake of simplicity, the power is transmitted from the fixed module to the mobile module, and the information signal is transmitted from the mobile module to the fixed module. The case of directional transmission will be described.

In FIG. 9, the main function of the fixed-side module A connected to the commercial power supply E is to transmit the power required for the operation of the mobile-side module B from the power transmission head 1 using the power carrier f1 as a medium. And demodulation after receiving the FM (frequency modulation) signal wave transmitted from the mobile side module B by the signal receiving antenna 4 and outputting the demodulated signal to the outside as a signal output D0.

On the other hand, the main functions of the mobile module B are:
The power transmitted by the power carrier f1 from the fixed-side module A is received by the power receiving head 2, and after rectification and smoothing, the power is supplied as the operating power of each part of the circuit. The signal carrier f2 is frequency-modulated by the input signal Di. After that, the FM signal wave is propagated from the transmitting antenna 3 toward the fixed-side module A.

The information signal transmitted from the mobile module B is transmitted to another external processing device via the fixed module A.

As the opposing heads of the power transmitting head 1 and the power receiving head 2 and the transmitting antenna 3 and the receiving antenna 4, various types can be used. In principle, a capacitor 5 and a coil as shown in FIG. 6 is often used in parallel.

The basic configuration of the opposed head according to the present invention is as follows. For example, in the case of power transmission, as shown in FIG. 11, 6-1 and 6-2 are wound around magnetic cores 7-1 and 7-2, respectively. In addition, capacitors 5-1 and 5-2 are connected in parallel to achieve tuning.

One of them acts on the electromagnetic coil of the power transmission head 2, and when both come close to each other, electromagnetic coupling occurs and power is supplied in a non-contact manner.

For the information signal, if the transmission frequency is selected to be high, an open type such as a radio wave antenna is generally applied instead of a closed type such as a coil.

If only the power transmission head 1 belonging to the fixed-side module A is arranged with the connection line extended, the power reception head 2 and the movable-side module B are moved to that position.
Can be set apart.

FIG. 12 shows a fixed module A operated by a commercial power source, a divided module A1 obtained by dividing only a circuit function part for supplying a power carrier f1, and a fixed module A0 for the other. is there. The configuration in which the power transmission head 1 is connected to this is nothing but a non-contact transmission device having the same operation and effect as FIG.

Therefore, although not shown, the division module A1 and the power transmission head 1 can be installed separately from the fixed-side module A0, and can be operated by a commercial power supply.

With such a separating means, a plurality of divided modules can be arranged everywhere, so that the number of movable modules can be increased compared to a set of fixed modules A0 provided with the antenna 4.

[Modification] In the above embodiment, since the relationship between the power transmitting head 1 and the power receiving head 2 is reversible globally, it goes without saying that the relationship may be reversed. Absent. Also, of the two modules,
Although A has been described as the fixed side and B as the moving side, both may be the fixed side or the moving side.

In addition, although the FM modulation method is used in the above embodiment, it is obvious that various modulation methods used for ordinary wireless communication can be applied in the present invention.

FIG. 5 shows the power receiving heads 2 opposed to the power transmitting division heads 1-1 and 1-2 provided in each of the plurality of division modules A1 and A2 belonging to the fixed-side module A0. -1 and 2-2 are provided with a plurality of moving side modules B1 and B2. In this embodiment, an information signal is exchanged between the antenna 3-1 or 3-2 of the mobile module B1 or B2 and the antenna 4 of the fixed module A0.

[0060]

According to the present invention, continuous power and data transmission can be performed simultaneously even when the relative moving distance between the moving part and the fixed part on the mechanism is considerably large. In particular, by appropriately combining and linking a plurality of heads, a large margin can be obtained in a required transmission area.

In addition, the configuration of the head including the antenna has an effect that it is possible to eliminate the need for adjustment and maintenance when installing or expanding the head, and to improve the reliability. And such a feature, when commercializing the present invention,
This is extremely advantageous in terms of mass productivity and inventory management.

Of the magnetic cores applied to this type of device, an expensive high-frequency ferrite core is used for transmitting information signals, but in the present invention, the core or the core is replaced by an antenna. Since the winding operation is unnecessary, it can greatly contribute to the reduction in the price of the entire system.

According to the present invention, even when the relative position and the moving distance between the moving part and the fixed part are considerably large, the power transmission head 1 including the fixed-side divided module A1 is arranged near the moving-side module. By doing so, it is possible to continuously perform predetermined information transmission without concern about power consumption of the moving unit. In addition, if a plurality of similarly configured divided modules are arranged everywhere, there is an unprecedented effect that a plurality of moving-side modules can be installed.

If means for storing the rectified and smoothed power supplied to the transfer-side module in a non-contact manner and storing it in the power storage device is used, information transmission between both the mobile unit and the fixed unit is performed over the operation area of the antenna. Needless to say, it can be applied.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a basic configuration example of a contactless transmission device according to the present invention.

FIG. 2 is a wiring diagram showing a circuit example of a transmission or reception head in one embodiment of the present invention.

FIG. 3 is a basic configuration diagram of a facing head according to an embodiment of the present invention.

FIG. 4 is a basic configuration diagram of an opposing head according to an embodiment of the present invention.

FIG. 5 is a configuration diagram of an opposing head according to an embodiment of the present invention.

FIG. 6 is an electric circuit diagram of the opposing head according to the embodiment of the present invention.

FIG. 7 is a diagram showing a configuration of a plurality of heads according to another embodiment of the present invention.

FIG. 8 is a diagram showing a configuration of a plurality of heads according to another embodiment of the present invention.

FIG. 9 is a block diagram showing a basic configuration example of a non-contact transmission device according to the present invention.

FIG. 10 is a wiring diagram showing a circuit example of a transmission or reception head in one embodiment of the present invention.

FIG. 11 is a basic configuration diagram of a facing head according to an embodiment of the present invention.

FIG. 12 is a basic configuration diagram of a contactless transmission device according to an embodiment of the present invention.

FIG. 13 is a block diagram showing a configuration according to an embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List A Fixed-side module B Moving-side module 1 Power transmission head 2 Power reception head 3 Signal transmission head 4 Signal reception head 5 Capacitor 6 Coil 7 Magnetic core 8 Loading coil 9-3 Signal transmission antenna 9-4 Signal reception antenna 10, 11, 12 head 13 rectifier 14 signal transmitting antenna 15 branching device 16 coaxial cable

[Procedure amendment]

[Submission date] March 25, 1998

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction contents]

[Document Name] Statement

Patent application title: Non-contact power and information transmission device with an interlocking head

[Claims]

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for transmitting a digital signal or an analog signal in a non-contact manner using electromagnetic waves, and more particularly to a device having a fixed body and a mobile body, for example, a traffic equipment, a vehicle, and a machine. In machines, robotic devices, communication and transport devices, and various other automatic machines, the mobile side module is mounted on the moving body, the fixed side module is mounted on the device body, and digital signals or digitized data signals that you want to transmit from the mobile side or The present invention relates to a device for transmitting an information signal of an analog signal (for example, shape, position, distortion, pressure, sound, temperature, color, etc.) to a fixed side in a non-contact manner.

[0002]

2. Description of the Related Art In a signal transmission device for transmitting a contactless signal by electromagnetic waves of this kind, a cross section of a cross section of a transmission head and a reception head which directly controls transmission of electric power and information signals has conventionally been circular or square. Things are commonly used. For this reason, when the power consumption of the moving-side module is constant, the distance that can be transmitted from the head is determined mainly by the performance of the coil with a magnetic core and the air-core coil related to power transmission.

[0003]

Therefore, in such a non-contact transmission, the maximum efficiency is obtained only when both heads face each other in a specified specific positional relationship, and when the heads are slightly deviated from that position. In this case, the power transmission efficiency is extremely reduced.

[0004] In particular, in a mechanism in which the moving part and the fixed part are close to or separated from each other in a straight line or a curved line, since there is a state where both heads do not face each other, continuous power and data transmission can be performed. Can not. Therefore, at present, transmission is performed only at a specific opposing position specified in advance, and the other position must be blind.

However, regarding the transmission and reception of only information signals,
Since the transmission power may be very small, there is an information transmission apparatus disclosed in Japanese Patent Application Laid-Open No. Sho 60-21640, in which transmission and reception are always performed continuously by an antenna of a moving part and a fixed part.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a signal transmission device configured to transmit electric power and information signals from one of a mobile module and a fixed module to the other by electromagnetic waves in a non-contact manner, and to provide a mechanical device for mounting the signal transmission device. It is an object of the present invention to provide a non-contact transmission device capable of continuing the transmission operation even when the moving body changes its relative positional relationship with the fixed body to some extent.

[0007]

SUMMARY OF THE INVENTION A non-contact power and information transmission apparatus provided with an interlocking head according to the present invention transmits power required for operation of a mobile module from a fixed module opposed thereto at a short distance. A function and a function of transmitting and receiving an information signal between the two modules, a signal transmission device that operates using an electromagnetic wave as a medium when a transmission head and a reception head provided in each of the modules face each other, The power receiving head is constituted by a combination of a plurality of heads linked to each other, and the information signal transmitting heads are respectively mounted near the heads.

[0008] Another characteristic is that a plurality of linking heads are linearly or planarly arranged at predetermined intervals to form a power receiving head. Also, each of the opposing heads including the coordinating head that controls transmission and reception of power and information signals is configured with a coil and a capacitor as main elements.
In addition, the power receiving head further comprises a coil and a capacitor as main elements, and the transmitting head and the receiving head for transmitting and receiving information signals can be formed as a shortened antenna having a loading coil as a main element.

Further, by inserting rectifiers in series at the output sides of a plurality of heads for which power receiving heads are linked to each other, it is possible to prevent current from flowing to heads other than the head receiving power. And a non-contact transmission device configured to combine respective outputs.

In particular, by limiting the interval between modules to a short distance to reduce the ratio of the required power for power transmission to the input power of the receiving system, the transmission system for power transmission and the signal transmission are reduced. And at the same time, they are mounted on the same module or the same head in order to simplify and miniaturize the handling.

The non-contact transmission device of the present invention has a structure in which electric power required for operation of the mobile module is supplied from the fixed module in a non-contact manner by electromagnetic waves. Then, the fixed-side module is operated by a commercial power supply or another power supply. Further, the signal transmission system of the non-contact transmission device of the present invention can be applied to either one-way or two-way transmission between both modules.

However, the induction disturbance from the power transmission system for transmitting the power of the mobile-side module in a non-contact manner to the signal-related reception system is a serious problem. That is, an output of several watts or more is required in order to transmit electric power enough to supply the operating power of the mobile module from the fixed module in a non-contact manner.

On the other hand, since the required receiving power of the receiving system is on the order of microwatts, the power ratio between them is 10,0.
In the case where both are incorporated in or near the same module as in the present invention, induction from the power transmission system to the reception system becomes an obstacle.

However, since the power ratio is proportional to the distance between the modules, when the distance between the modules is small, the transmission power may be small, and the receiving sensitivity may be low. The induction to the small. In the present invention, the distance between modules is set to the minimum necessary (for example, 5
This problem has been solved, and practical use has become possible.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the embodiments of the present invention described below, power is transmitted from a fixed module to a mobile module, and information signals are transmitted from the mobile module to the fixed module for simplification of description. The case of unidirectional transmission for transmission will be described.

The main functions of the fixed-side module A in FIG. 1 are to transmit the power required for the operation of the mobile-side module B from the power transmission head 1 using the power carrier f1 as a medium, and to transmit from the mobile-side module B FM that has been
Demodulated after receiving the (frequency modulation) signal wave by the signal reception head 4, and output as a signal output D ₀ to the outside.

On the other hand, the main functions of the mobile module B are as follows.
The power transmitted by the power carrier f1 from the fixed-side module A is received by the power receiving head 2, and after rectification and smoothing, the power is supplied as the operating power of each unit. The frequency of the signal carrier f2 is modulated by the input signal Di. FM
After the modulated wave, the signal is transmitted by the signal transmission head 3 toward the fixed-side module A.

The opposing heads of the power transmitting head 1 and the power receiving head 2 and the opposing heads of the signal transmitting head 3 and the signal receiving head 4 can use various types, but basically, a capacitor as shown in FIG. In many cases, a coil 6 in which coils 5 are connected in parallel is used.

The basic configuration of the opposed head according to the present invention is as follows. For example, in the case of power transmission, coils 6-1 and 6-2 are wound around magnetic cores 7-1 and 7-2, respectively, as shown in FIG. Capacitors 5-1 and 5-2 are connected in parallel with each other to perform tuning, and one of them is used as a power transmission head 1 and the other is used as a power reception head 2 so as to face each other.

Regarding the opposing head for information signals,
If the transmission frequency is selected to be high, an open type such as a general antenna can be applied instead of a closed type such as a coil. However, when the transmission distance between the two modules is relatively short as described above, the gain does not matter, and therefore it is not necessary to use an antenna having a length that is an integral multiple of the normally used quarter wavelength. Therefore, as a basic configuration of two pairs of opposing heads that simultaneously transmit power and an information signal, an antenna 9 to which a loading coil 8 for shortening an antenna for transmitting an information signal is added as shown in FIG. A facing head using -3, 9-4 is used.

That is, the fixed side module A includes the signal receiving head 4 near the coil 6-1 of the power transmitting head 1.
Antenna 9-4. Similarly, the moving-side module B is equipped with the antenna 9-3 of the signal transmitting head 3 near the coil 6-2 of the power receiving head 2 to constitute two pairs of opposing heads. In such a case, as shown in FIG. 4, even if the shape of the power transmission head 1 is smaller than that of the power reception head 2, it is usual that the power transmission head 1 is designed to sufficiently achieve the purpose of transmission. Further, the outer shape and cross-sectional shape of the magnetic core 7 are not necessarily limited to the rectangular parallelepiped shape as illustrated.

In the non-contact transmission device of the present invention, as shown in FIG. 5, for example, the power transmission head 1 mounted on a fixed portion of a mechanical device includes one coil 6-1 and one capacitor 5-1. It is configured as the main element. The power receiving head 2 mounted on the moving unit includes a plurality of heads 10 each having a coil 6-2 and a capacitor 5-2 as main elements, and a plurality of heads 11 and 12 equivalent thereto. They are arranged linearly at intervals.

When each of the heads 10 to 12 of the power receiving head 2 mounted on the moving part reciprocates linearly with a large stroke, one of the heads is always connected to the power transmitting head 1 of the fixed part. They are opposed to each other. Therefore, the predetermined transmission operation is continuously performed.

In FIG. 6, the high-frequency output transmitted from the power transmitting head 1 composed of the coil 6-1 and the capacitor 5-1 is supplied to the capacitors corresponding to the coils 6-2, 6-3, 6-4, etc. A plurality of heads composed of 5-2, 5-3, 5-4, etc. are received by the power receiving head 2 configured in cooperation. This received power is used as a power source for the operation circuit of the mobile module.

However, in principle, power is transmitted only to the plurality of power receiving heads 2 which are opposed to the power transmitting head 1 among a plurality of power receiving heads 2. In this case, it is sufficient that all the heads always resonate with the power carrier f1 (in the case of parallel tuning, the impedance at the frequency becomes infinite). The resonance frequency deviates due to the mutual inductance between the two heads. For this reason, in order to improve the power transmission efficiency, it is necessary to set a head that is actually involved in transmission, that is, a head facing the power transmission head 1 so as to resonate with the power carrier f1. .

Therefore, the resonance frequency of the head not facing the power transmission head 1 is shifted from the power carrier f1, and the impedance at the frequency is reduced. It also affects the resonance of the head involved in transmission. In such a case, by connecting the rectifier 13 to a plurality of linking heads as shown in FIG. 6 and rectifying the induced high-frequency waves to convert them into direct current and then combining them, the above-mentioned adverse effects can be reduced and The effect of preventing a so-called current sneak phenomenon in which the received power is short-circuited by the resistance of the coil which is not related to the resonance of the receiving head can be brought about.

In the above embodiment, a plurality of heads are arranged linearly at a predetermined interval, and electrically connected in parallel. However, even when a plurality of heads are arranged in a curved line, or in a plane or three-dimensional arrangement, at least one of these heads faces the other head. With such settings, the operation and effect are exactly the same as described above. The heads may be electrically connected in series, or may be connected in a matrix.

In the above embodiment, the configuration of the opposing head for power transmission has been mainly described. However, the opposing head for information signal transmission is not limited to the coil for signal transmission together with the power transmission coil and the magnetic core. Can be wound. And
The signal-to-noise ratio can be increased by using measures such as selection of frequencies related to power transmission and signal transmission and improvement in sensitivity and selectivity of the signal receiving system.

As described above, when an antenna is used as an opposing head for transmitting information signals, in an electric power receiving head in which a plurality of heads are combined as described above, the antenna is connected to a coil for electric power transmission. For example, the antenna may be integrated by winding it around a core, or installed near each power transmission head, or provided with an antenna that works across each power transmission head. However,
When an electromagnetic wave having a frequency enough to use an antenna is used for the information signal transmission system, a wide range can be covered. Therefore, a large number of receiving heads may be covered with one or several pairs of antennas.

FIG. 7 shows a configuration example in which a signal transmission antenna 14 and a loading coil 8 provided for each head are provided.
This is an embodiment in which power supply processing is performed using a coaxial cable 16 from the branching unit 15 connected to the output terminal for the signal carrier f2 of the mobile module B. Further FIG.
In this method, a portion of the signal transmitting antenna 14 is folded as shown in the figure.
It is something of the form.

For the purpose of improving the effect on the power transmission side and reducing unnecessary high-frequency radiation, power is not supplied to a plurality of power transmission heads on average, and for example, a light source such as an LED is mounted on the power reception head. A light receiving element such as a phototransistor is installed in each of the plurality of power transmission heads, and the output thereof is applied to a power multiplexer, thereby opposing the power reception head from the plurality of power transmission heads. It is also possible to detect what is being done and supply power only to the head by applying a conventional technique.

In the above embodiment, since the relationship between the power transmitting head 1 and the power receiving head 2 is globally reversible, it goes without saying that the relationship may be reversed. Of the two modules, A is the fixed side, B is
Has been described as the movable side, but both may be the fixed side or the movable side. In addition, although the FM modulation method is used as the modulation method in the above embodiment, it is obvious that various modulation methods used for ordinary wireless communication can be almost applied in the present invention.

[0033]

According to the present invention, continuous power and data transmission can be performed simultaneously even when the relative moving distance between the moving part and the fixed part on the mechanism is considerably large. In particular, by appropriately combining and linking a plurality of heads, a large margin can be obtained in a required transmission area.

In addition, the configuration of the head including the antenna has an effect that adjustment and simplicity of maintenance can be performed at the time of installation and extension, and reliability is improved. And such a feature, when commercializing the present invention,
This is extremely advantageous in terms of mass productivity and inventory management.

Among the magnetic cores applied to this type of device, an expensive high-frequency ferrite core is used particularly for transmitting information signals, but in the present invention, the core or the core is replaced by an antenna. Since the winding operation is unnecessary, it can greatly contribute to the reduction in the price of the entire system.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a basic configuration example of a contactless transmission device according to the present invention.

FIG. 2 is a wiring diagram showing a circuit example of a transmission or reception head in one embodiment of the present invention.

FIG. 3 is a basic configuration diagram of a facing head according to an embodiment of the present invention.

FIG. 4 is a basic configuration diagram of a facing head according to an embodiment of the present invention.

FIG. 5 is a configuration diagram of an opposing head in one embodiment of the present invention.

FIG. 6 is an electric circuit diagram of a facing head according to an embodiment of the present invention.

FIG. 7 is a diagram showing a configuration of a plurality of heads according to another embodiment of the present invention.

FIG. 8 is a diagram showing a configuration of a plurality of heads according to another embodiment of the present invention.

[Description of Signs] A Fixed-side module B Moving-side module 1 Power transmission head 2 Power reception head 3 Signal transmission head 4 Signal reception head 5 Capacitor 6 Coil 7 Magnetic core 8 Loading coil 9-3 Signal transmission antenna 9-4 Signal reception Antennas 10, 11, 12 Head 13 Rectifier 14 Signal transmission antenna 15 Branching device 16 Coaxial cable

[Procedure amendment 2]

[Document name to be amended] Drawing

[Correction target item name] All figures

[Correction method] Change

[Correction contents]

[Fig. 1]

FIG. 2

[Fig. 3]

[Fig. 4]

[Fig. 5]

[Fig. 6]

[Fig. 7]

[Fig. 8]

Claims (3)

[Claims] A mobile module and a fixed module are provided, and when a transmission head and a reception head provided in both modules face each other with a gap therebetween, power required for operation of the mobile module is supplied. In the signal transmission device having a function of non-contact transmission and reception of information signals between the two modules while performing non-contact transmission using electromagnetic waves as a medium from the fixed-side module, the power head in at least one of the two modules, A non-contact power and information transmission device including a linking head, comprising a combination head in which a plurality of heads are linked to each other. 2. A power and information non-contact transmission device provided with an interlocking head according to claim 1, wherein a rectifier is inserted in series at an output side of the power head, and power is received. A non-contact transmission device for electric power and information, comprising: a linking head configured to prevent current from flowing to a linking head other than the linking head and to combine outputs of the linking head. 3. A mobile side module and a fixed side module are provided, and when a transmission head and a reception head provided in both modules face each other with a gap therebetween, power required for operation of the mobile side module is provided. In the signal transmission device having a function of non-contact transmission and reception of information signals between the two modules while performing non-contact transmission using electromagnetic waves as a medium from the fixed-side module, the power required for the operation of the mobile-side module is The power receiving head of the moving-side module and the power transmitting head belonging to the fixed-side module, each of which is configured using an electromagnetic coil, transmit the power carrier in a non-contact manner during the electromagnetic coupling period close to each other, and perform rectification and smoothing. A non-contact transmission device for electric power and information, characterized in that it is configured to be obtained.