JP3751925B2 - Transceiver - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a transceiver used for data communication, for example, between wearable computers, and more particularly, to induce an electric field based on information to be transmitted in an electric field transmission medium. The present invention relates to a transceiver that transmits / receives information using a communication device.
[0002]
[Prior art]
2. Description of the Related Art Wearable computers have attracted attention due to the miniaturization and performance enhancement of portable terminals, and FIG. 2 shows an example in which such wearable computers are worn and used by humans. As shown in the figure, each wearable computer 1 is attached to a human arm, shoulder, torso, etc. via a transceiver 3 to transmit / receive data to / from each other, and further provided on a wall, floor, etc. at the tip of a limb. Communication is performed with a personal computer (PC) 5 provided outside via the transceivers 3a and 3b that can be touched and a cable.
[0003]
As described above, the wearable computer 1 is attached to a living person via the transceiver 3 to perform data communication. The transceiver 3 induces transmission data from the wearable computer 1 as an electric field in the living body that is an electric field transmission medium, As shown by the wavy line in FIG. 2, the electric field is transmitted to other parts of the living body as an electric field, and the electric field induced and transmitted to the living body is received by the transceiver 3 as received data and sent to the wearable computer 1.
[0004]
The transceiver 3 is configured as shown in FIG. 3. When the transmission data from the wearable computer 1 is received via the input / output (I / O) circuit 101, the transmission data is sent to the transmission / reception electrode 105 via the transmission circuit 103. Then, an electric field is induced in the living body 100 which is an electric field transmission medium from the transmitting / receiving electrode 105 through the insulating film 107, and this electric field is transmitted to other parts of the living body 100 through the living body 100.
[0005]
In addition, the transceiver 3 receives the electric field induced and transmitted to the living body 100 from another transceiver 3 attached to another part of the living body 100 by the transmission / reception electrode 105 through the insulating film 107, and receives the received electric field. The electric field is coupled to the electric field detection optical unit 110 and converted into an electric signal. This electric signal is subjected to signal processing such as amplification and noise removal by the signal processing circuit 113, further waveform-shaped by the waveform shaping circuit 115 and converted into a digital signal, and then transmitted to the wearable computer 1 via the input / output circuit 101. It comes to be supplied.
[0006]
The electric field detection optical unit 110 of the transceiver 3 detects an electric field that is induced and transmitted to the living body 100 and is coupled through the insulating film 107 and the transmission / reception electrode 105, converts the electric field into an electric signal, and outputs the electric signal to the signal processing circuit 113. In detail, the configuration is as shown in FIG.
[0007]
The electric field detection optical unit 110 shown in FIG. 4 detects an electric field by an electro-optic technique using laser light and an electro-optic crystal, and includes an electro-optic element composed of a laser diode 121 and an electro-optic crystal constituting a laser light source. 123. The electro-optical element 123 is sensitive to an electric field coupled in a direction perpendicular to the traveling direction of the laser light from the laser diode 121, and the optical characteristics, that is, the birefringence index changes depending on the electric field strength. The polarization of the laser beam is changed by the change of the birefringence.
[0008]
First and second electrodes 125 and 127 are provided on both side surfaces of the electro-optic element 123 facing in the vertical direction in the drawing. The first and second electrodes 125 and 127 sandwich the traveling direction of the laser light from the laser diode 121 in the electro-optic element 123 from both sides, and couple the electric field to the laser light at a right angle. Yes.
[0009]
The electric field detection optical unit 110 includes the same transmission / reception electrode 105 as shown in FIG. 3, and the transmission / reception electrode 105 is connected to the first electrode 125. Further, the second electrode 127 facing the first electrode 125 is connected to the first ground electrode 131 and is configured to function as a ground electrode with respect to the first electrode 125. When the transmission / reception electrode 105 detects the electric field induced and transmitted to the living body 100, the transmission / reception electrode 105 transmits the electric field to the first electrode 125 and is coupled to the electro-optic element 123 via the first electrode 125. .
[0010]
Laser light output from the laser diode 121 is converted into parallel light through a collimator lens 134, and the laser light that has become parallel light is adjusted in polarization state by the first wave plate 135 and enters the electro-optical element 123. The laser light incident on the electro-optical element 123 propagates between the first and second electrodes 125 and 127 in the electro-optical element 123. During the propagation of the laser light, the transmission / reception electrode 105 is connected to the living body 100 as described above. When the electric field induced and transmitted is coupled to the electro-optic element 123 via the first electrode 125, the electric field is connected to the first ground electrode 131 from the first electrode 125. Since it is formed toward the electrode 127 and is perpendicular to the traveling direction of the laser light incident on the electro-optic element 123 from the laser diode 121, the birefringence, which is the optical characteristic of the electro-optic element 123, changes, thereby causing the laser. The polarization of light changes.
[0011]
In this way, the laser light whose polarization has been changed by the electric field from the first electrode 125 in the electro-optic element 123 is adjusted in polarization state by the second wave plate 137 and is incident on the polarization beam splitter 139. The polarization beam splitter 139 separates the laser light incident from the second wave plate 137 into P waves and S waves and converts them into changes in light intensity. The laser beams separated into the P wave component and the S wave component by the polarization beam splitter 139 are condensed by the first and second condenser lenses 141a and 141b, respectively, and then the first and second photodiodes 143a and 143b. In the first and second photodiodes 143a and 143b, the P-wave optical signal and the S-wave optical signal are converted into respective electric signals and output.
[0012]
As described above, the electric signals output from the first and second photodiodes 143a and 143b are subjected to signal processing such as amplification and noise removal by the signal processing circuit 113 shown in FIG. The waveform is shaped and supplied to the wearable computer 1 via the input / output circuit 101.
[0013]
Note that in the conventional transceiver configured as described above, the transmission / reception electrode 105 is configured integrally with the transceiver body, or the ground electrode for the electro-optical element 123 or the ground electrode for the circuit is not particularly provided. Is also configured integrally with the transceiver body.
[0014]
[Patent Document 1]
JP 2001-352298 A
[0015]
[Patent Document 2]
JP 2001-298425 A
[0016]
[Problems to be solved by the invention]
In the conventional transceiver described above, all of the electric field injected from the transmission / reception electrode 105 into the living body 100 may be transmitted from the transmission / reception electrode 105 of the other transceiver to the electro-optical element 123 of the electric field detection optical unit 110 through the living body 100. However, in the conventional transceiver, the transmission / reception electrode 105 is configured integrally with the transceiver body, or the ground electrode for the electro-optic element 123 and the circuit ground electrode are not particularly provided, or even if provided, the transceiver body is configured integrally with the transceiver body. Therefore, the electric field injected into the living body 100 not only leaks from the living body 100 to the earth ground, but also cancels out unnecessary electromagnetic waves and antiphase electric fields mixed in from each ground electrode of the transceiver. And the electric field transmitted to the electro-optic element 123 is reduced, resulting in poor communication quality. There is a problem in that.
[0017]
The transceiver operates without providing a ground electrode in the electro-optical element 123. However, when the ground electrode is not provided, the electric field coupled to the electro-optical element 123 is lowered to deteriorate communication quality. is there.
[0018]
Further, when a ground electrode is not provided in a circuit such as the transceiver transmission circuit 103, signal processing circuit 113, and waveform shaping circuit 115, the ground of the circuit is shaken to reduce the magnitude of the electric field induced in the living body. There is a problem that quality deteriorates.
[0019]
The present invention has been made in view of the above, and an object of the present invention is to separate the transmission / reception electrode from the transceiver body, and to separate the ground electrode for the electro-optic element and the circuit ground electrode from the transceiver body to a living body. It is an object of the present invention to provide a transceiver that prevents an induced electric field from being lowered, clarifys and strengthens a ground, and improves communication quality.
[0020]
[Means for Solving the Problems]
To achieve the above object, the present invention according to claim 1 is a transceiver for inducing an electric field based on information to be transmitted in an electric field transmission medium and transmitting / receiving information using the induced electric field. A transmission / reception electrode for inducing an electric field to the medium and receiving the electric field induced in the electric field transmission medium, and an electric field based on information to be transmitted are transmitted to the transmission / reception electrode to induce the electric field transmission medium through the transmission / reception electrode A transmission circuit that supplies information; an electric field detection optical unit that detects an electric field received from an electric field transmission medium by the transmission / reception electrode; and a reception that performs signal processing on a detection signal output from the electric field detection optical unit and outputs the received signal as reception information An electric field is efficiently coupled to a circuit, a first connection unit that connects the transmission circuit and the electric field detection optical unit to the transmission / reception electrode, and an electro-optical element in the electric field detection optical unit. And having a second connection portion for connecting the first ground electrode and a circuit ground electrode connection portion for connecting a circuit ground electrode for reinforcing the ground of the transmission circuit and the reception circuit. .
[0021]
In the first aspect of the present invention, since the transmission / reception electrodes are connected by the first connection part, each part of the transceiver is provided by providing the transmission / reception electrodes apart through the first connection part. In addition, unnecessary electromagnetic waves from each ground electrode or an electric field having an opposite phase can be reduced from entering the transmission / reception electrode, thereby preventing a reduction in the original electric field at the transmission / reception electrode and improving communication quality. In addition, since the first ground electrode for the electro-optic element and the ground electrode for the circuit in the electric field detection optical unit can be connected to each other by the connection portion of the second connection portion and the circuit ground electrode, the second By separately providing the first ground electrode via the connection portion, and by providing the circuit ground electrode separately via the connection portion of the circuit ground electrode, Clarification and strengthening of the ground for the optical optical element and circuit can be achieved, thereby increasing the amount of electric field coupled to the electro-optical element and preventing the signal level from being lowered due to the ground swinging to the circuit. In addition, by providing the first ground electrode and the circuit ground electrode apart from each other, unnecessary electromagnetic waves and electric fields having opposite phases from the first ground electrode and the circuit ground electrode are mixed into the transmission / reception electrode. It is possible to prevent the electric field from being reduced and improve the communication quality.
[0022]
According to a second aspect of the present invention, in the first aspect of the present invention, the ground electrode for the circuit reinforces the second ground electrode for strengthening the ground of the receiving circuit and the ground of the transmitting circuit. A third ground electrode for connecting the second ground electrode and a fourth connection portion for connecting the third ground electrode to each other. The gist is to have them separately.
[0023]
According to the second aspect of the present invention, the second ground electrode for the receiving circuit can be connected by the third connecting portion, and the third ground electrode for the transmitting circuit can be connected by the fourth connecting portion. Since the second and third ground electrodes for the receiving circuit and the transmitting circuit are provided apart via the third and fourth connecting portions, the ground of the receiving circuit and the transmitting circuit can be connected. Clarification and strengthening are achieved, thereby preventing the electric field strength induced in the living body from being lowered, for example, by shaking the ground, and separating the second and third ground electrodes for the receiving circuit and the transmitting circuit. By providing them, unnecessary electromagnetic waves from the second and third ground electrodes and anti-phase electric fields can be prevented from being mixed into the transmission / reception electrodes and the like, thereby preventing the electric field at the transmission / reception electrodes from decreasing. It is possible to improve the communication quality.
[0024]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a transceiver according to an embodiment of the present invention.
[0025]
The transceiver 30 of the embodiment shown in the figure has basically the same configuration as the conventional transceiver 3 shown in FIG. 3, and is connected to the wearable computer 1 to input / output data 101. The transmission / reception electrode 105 attached to the living body 100 via the insulating film 107, the transmission circuit 103 provided between the transmission / reception electrode 105 and the input / output circuit 101, the electric field detection optical unit 110, the signal processing circuit 113, and the waveform shaping The receiving circuit 114 including the circuit 115 is the same, but the electric field induced in the living body 100 from the transmission / reception electrode 105 cancels out an unnecessary electromagnetic wave mixed from each ground electrode of the transceiver or an electric field having an opposite phase. Thus, the electric field induced in the living body 100 and the electric field transmitted to the electro-optic element 123 are prevented from being lowered, and That is configured to be provided apart transmitting and receiving electrode 105 and the ground electrode from the transceiver main body 30a in order to strengthen the land is different from the conventional.
[0026]
More specifically, as shown in FIG. 1, the transceiver 30 of this embodiment includes a transceiver main body 30a, a transmission / reception electrode 105, an insulating film 107, a first ground electrode 131, a second transmission electrode 105 provided outside the main body 30a. The ground electrode 132 and the third ground electrode 133 are configured, and the first connection portion 150, the second connection portion 151, the third connection portion 152, respectively, are provided between the electrodes provided outside and the transceiver body 30 a. The fourth connection unit 153 is connected.
[0027]
That is, among the electrodes provided outside the transceiver body 30 a, the transmission / reception electrode 105 is connected to the transmission circuit 103 and the electric field detection optical unit 110 in the transceiver body 30 a via the first connection unit 150. The first connection unit 150 electrically connects the transmission circuit 103 and the electric field detection optical unit 110 to the transmission / reception electrode 105. The transmission / reception electrode 105 is connected to the transceiver main body 30a via the first connection unit 150. It is designed to be provided outside.
[0028]
The first ground electrode 131 is an electrode for efficiently coupling an electric field to the electro-optical element 123 in the electric field detection optical unit 110 as shown in FIG. To the electric field detection optical unit 110 in the transceiver body 30a. Specifically, the first ground electrode 131 is connected to the electro-optical element 123 in the electric field detection optical unit 110 through the second connection unit 151 as shown in FIG.
[0029]
The second connection portion 151 is for electrically connecting the first ground electrode 131 to the electric field detection optical unit 110 while being separated from the electric field detection optical unit 110, and cancels the electrical connection of the first ground electrode 131. A connection terminal or a connector for connection so that the first ground electrode 131 is electrically connected to the electric field detection optical unit 110 via the second connection part 151 by the connection terminal or the connector for connection; Alternatively, the electric field detection optical unit 110 can be electrically separated from the first ground electrode 131 by removing the first ground electrode 131.
[0030]
Further, the second ground electrode 132 is connected to the ground of the signal processing circuit 113 and the waveform shaping circuit 115 that constitute the receiving circuit 114 in the transceiver main body 30a via the third connection unit 152, and the third ground electrode 133 is connected to the ground. And connected to the ground of the transmission circuit 103 in the transceiver main body 30a via the fourth connection portion 153.
[0031]
The third connection portion 152 is for electrically connecting the second ground electrode 132 to the receiving circuit 114 while being separated from the receiving circuit 114, and can release the electrical connection of the second ground electrode 132. The connection terminal or the connector for connection is provided, and the second ground electrode 132 is electrically connected to the receiving circuit 114 via the third connection part 152 by the connection terminal or the connector for connection, or the second ground. The receiving circuit 114 can be separated from the second ground electrode 132 by removing the electrode 132. Similarly, the fourth connection portion 153 also electrically connects the third ground electrode 133 to the transmission circuit 103 while being separated from the transmission circuit 103, and releases the electrical connection of the third ground electrode 133. A connection terminal or a connector for connection so that the third ground electrode 133 can be electrically connected to the transmission circuit 103 via the fourth connection portion 153 by using the connection terminal or the connector for connection; The three ground electrodes 133 can be separated from the transmission circuit 103.
[0032]
In the transceiver 30 of the present embodiment configured as described above, first, the transmission / reception electrode 105 can be separately provided outside the transceiver body 30a via the first connection portion 150. Unnecessary electromagnetic waves from each ground electrode, an electric field having an opposite phase, or the like is reduced from entering the transmission / reception electrode 105, thereby preventing a reduction in the original electric field at the transmission / reception electrode 105 and improving communication quality. be able to.
[0033]
Further, since the first ground electrode 131 for the electric field detection optical unit 110 can be provided outside the transceiver body 30a via the second connection unit 151, the electro-optical element of the electric field detection optical unit 110 The ground with respect to 123 is clarified and strengthened, whereby the amount of electric field coupled to the electro-optic element 123 can be increased, and the first ground electrode 131 is provided outside, thereby providing the first ground electrode. It is possible to prevent unnecessary electromagnetic waves from 131 and an electric field having an opposite phase from being mixed into the transmission / reception electrode 105 and the like, thereby reducing the electric field at the transmission / reception electrode 105 and improving communication quality.
[0034]
Further, as described above, since the first ground electrode 131 is connected to the electric field detection optical unit 110 by the connection terminal or the connector for connection in the second connection part 151, the connection terminal or the connector for connection is used. The first ground electrode 131 can be removed at a portion, whereby the electric field detection optical unit 110 can be electrically separated from the first ground electrode 131. In some cases, it may be desirable to remove the ground electrode 131.
[0035]
That is, generally, when the first ground electrode 131 is connected to the electric field detection optical unit 110, the communication quality of the transceiver 30 is improved, but the first ground electrode 131 is connected to the electric field detection optical unit 110. The state does not always bring the communication quality of the transceiver 30 to the best state, and in some cases, when the first ground electrode 131 is connected, the communication quality may deteriorate. Therefore, in the present embodiment, the first ground electrode 131 is configured to be removable at the second connection portion 151 by a connection terminal or a connector for connection.
[0036]
Further, since the second ground electrode 132 for the receiving circuit 114 can be provided outside the transceiver body 30a via the third connection portion 152, the ground for the receiving circuit 114 can be clarified and strengthened. As a result, it is possible to prevent the signal level from being lowered due to shaking of the ground and the like, and by providing the second ground electrode 132 away from the outside, unnecessary electromagnetic waves and reverse from the second ground electrode 132 can be prevented. It is possible to prevent a phase electric field or the like from being mixed into the transmission / reception electrode 105 and the like, and to reduce the electric field at the transmission / reception electrode 105, thereby improving communication quality.
[0037]
Further, since the second ground electrode 132 is connected to the receiving circuit 114 at the third connection portion 152 by a connection terminal or a connector for connection, the second ground electrode 132 is connected to the connection terminal or the connector for connection. Thus, the receiving circuit 114 can be separated from the second ground electrode 132. However, in some cases, the second ground electrode 132 may be removed in this manner.
[0038]
That is, generally, when the second ground electrode 132 is connected to the receiving circuit 114, the communication quality of the transceiver 30 is improved, but the state where the second ground electrode 132 is connected to the receiving circuit 114 is always in the transceiver. The communication quality is not always in the best state, and in some cases, the connection of the second ground electrode 132 may deteriorate the communication quality. Therefore, in the present embodiment, the second ground electrode 132 is configured to be removable at the third connection portion 152 with a connection terminal or a connector for connection.
[0039]
Furthermore, since the third ground electrode 133 for the transmission circuit 103 can be provided outside the transceiver body 30a via the fourth connection portion 153, the ground for the transmission circuit 103 is clarified and enhanced. As a result, it is possible to prevent the electric field strength induced in the living body from being lowered due to shaking of the ground and the like, and by providing the third ground electrode 133 apart from the third ground electrode 133, Therefore, it is possible to prevent unnecessary electromagnetic waves, anti-phase electric fields, and the like from being mixed into the transmission / reception electrode 105 and the like, thereby reducing the electric field at the transmission / reception electrode 105 and improving communication quality.
[0040]
In addition, since the third ground electrode 133 is connected to the transmission circuit 103 by a connection terminal or a connector for connection in the fourth connection portion 153, the third ground electrode 133 is connected to the connection terminal or the connector for connection. Thus, the transmission circuit 103 can be disconnected from the third ground electrode 133. However, in some cases, it may be preferable to remove the third ground electrode 133 in this way.
[0041]
That is, generally, when the third ground electrode 133 is connected to the transmission circuit 103, the communication quality of the transceiver 30 is improved, but the state where the third ground electrode 133 is connected to the transmission circuit 103 is always in the transceiver. The communication quality is not always in the best state, and in some cases, the connection of the third ground electrode 133 may deteriorate the communication quality. Therefore, in the present embodiment, the third ground electrode 133 is configured to be removable at the fourth connection portion 153 with a connection terminal or a connector for connection.
[0042]
In the above embodiment, the second ground electrode 132 and the third ground electrode 133 are separately provided for the reception circuit 114 and the transmission circuit 103, but the second ground electrode 132 and the third ground electrode 133 are shared. The single ground electrode may be connected to both the reception circuit 114 and the transmission circuit 103 in common. In this case, the third connection part 152 and the fourth connection part 153 are also one common connection part.
[0043]
In addition, as each ground electrode, for example, a copper plate is provided away from the transceiver body, or is provided away from a portion where a circuit is provided in the transceiver body case, or a strap-like cable is provided from the transceiver case. A configuration such as hanging is also conceivable.
[0044]
【The invention's effect】
As described above, according to the present invention, since the transmission / reception electrodes are connected by the first connection part, each part of the transceiver is provided by providing the transmission / reception electrodes apart via the first connection part. And unnecessary electromagnetic waves from each ground electrode or an electric field having an opposite phase can be reduced from entering the transmission / reception electrode, thereby preventing a reduction in the original electric field at the transmission / reception electrode and improving communication quality. In addition, since the first ground electrode for the electro-optic element and the ground electrode for the circuit in the electric field detection optical unit can be connected to each other by the connection portion of the second connection portion and the circuit ground electrode, the second The first ground electrode is provided separately via the connection part, and the circuit ground electrode is provided separately via the connection part of the circuit ground electrode. The ground for the electro-optical element and the circuit is clarified and strengthened, thereby increasing the amount of electric field coupled to the electro-optical element, and the electric field strength induced in the living body due to the ground swinging is applied to the circuit. It is possible to prevent a decrease, and by providing the first ground electrode and the circuit ground electrode apart from each other, unwanted electromagnetic waves and antiphase electric fields from the first ground electrode and the circuit ground electrode can be transmitted and received. It is possible to prevent the electric field in the transmission / reception electrode from being reduced and to improve the communication quality.
[0045]
According to the present invention, the second ground electrode for the receiving circuit can be connected by the third connecting portion, and the third ground electrode for the transmitting circuit can be connected by the fourth connecting portion. Since the second and third ground electrodes for the receiving circuit and the transmitting circuit are provided apart via the third and fourth connecting portions, the ground for the receiving circuit and the transmitting circuit is clarified and strengthened. As a result, it is possible to prevent the signal level from being lowered due to the fluctuation of the ground, and the second and third ground electrodes for the receiving circuit and the transmitting circuit are provided apart from each other. (3) It is possible to prevent unnecessary electromagnetic waves from the ground electrode or an electric field having an opposite phase from being mixed into the transmission / reception electrode, etc., and to reduce the electric field at the transmission / reception electrode, thereby improving communication quality It can be.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration of a transceiver according to an embodiment of the present invention.
FIG. 2 is an explanatory diagram showing an example in which a wearable computer is worn on a person via a transceiver and used.
FIG. 3 is a block diagram showing a circuit configuration of a transceiver for attaching a wearable computer to a living body.
4 is a diagram showing a configuration of an electric field detection optical device used in the transceiver shown in FIG. 3. FIG.
[Explanation of symbols]
30 Transceiver
30a Transceiver body
100 living body
103 Transmitter circuit
105 Transmitting and receiving electrodes
110 Electric field detection optics
114 Receiving circuit
131 1st ground electrode
132 Second ground electrode
133 Third ground electrode
150 1st connection part
151 2nd connection part
152 3rd connection part
153 4th connection part

Claims (2)

A transceiver that induces an electric field based on information to be transmitted in an electric field transmission medium, and transmits and receives information using the induced electric field,
A transmission / reception electrode for inducing an electric field with respect to the electric field transmission medium and receiving the electric field induced in the electric field transmission medium;
A transmission circuit for supplying transmission information to the transmission / reception electrode to induce an electric field based on information to be transmitted to the electric field transmission medium via the transmission / reception electrode;
An electric field detection optical unit for detecting an electric field received from an electric field transmission medium by the transmission and reception electrodes;
A receiving circuit that performs signal processing on the detection signal output from the electric field detection optical unit and outputs it as reception information;
A first connection part for connecting the transmission circuit and the electric field detection optical part to the transmission / reception electrode;
A second connecting portion for connecting a first ground electrode for efficiently coupling an electric field to an electro-optic element in the electric field detecting optical portion;
A transceiver comprising: a circuit ground electrode connection portion for connecting a circuit ground electrode for reinforcing the ground of the transmission circuit and the reception circuit. The circuit ground electrode separately includes a second ground electrode for reinforcing the ground of the receiving circuit and a third ground electrode for reinforcing the ground of the transmitting circuit,
The connection part of the circuit ground electrode has a third connection part for connecting the second ground electrode and a fourth connection part for connecting the third ground electrode separately. Transceiver.

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