JP4819916B2 - Electric field transceiver - Google Patents

Description

  The present invention relates to an electric field transceiver that receives an electric field induced in the vicinity of a signal source and induces an electric field in a space near an electric field transmission medium.

  In recent years, as an electric field transceiver that receives an electric field induced in a space near an electric field transmission medium and induces (transmits) an electric field in the space near the electric field transmission medium, for example, the following Patent Document 1 and Patent Document 2 is disclosed.

JP 2007-174570 A WO05 / 015247

  In such an electric field transceiver, electric fields are transmitted and received through electrodes. However, for example, when the situation of the installation location of the electric field transceiver is unknown, it is not possible to confirm what kind of electrode configuration is appropriate unless the communication quality is measured at the installation location. Could not get.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide an electric field transceiver that can appropriately select an electrode configuration and stably obtain high communication quality.

In order to solve the above problems, the electric field transceiver of the present invention is connected to the first electrode, the second electrode, the third electrode, the fourth electrode, the transmitter, the receiver, and each of the electrodes. Connected to an output node of the transmitter, a terminal connected to a ground node common to the transmitter and the receiver, and connected to each input node of a differential amplifier in the receiver And a switch configured to be connectable between arbitrary terminals, the switch having a terminal connected to an output node of the transmitter connected to the first electrode or the third electrode. And one terminal connected to each input node of the differential amplifier is connected to the third electrode or a terminal connected to the first electrode, and the first electrode and the first electrode Each of the three electrodes has a comb shape, and the first Electrode, characterized in that it is arranged to engage with the third electrode.

The switch connects a terminal connected to the ground node to a terminal connected to the second electrode and the other terminal connected to each input node of the differential amplifier to the fourth electrode. Connected to a connected terminal, the second electrode is comb-shaped or polygonal-line type, the fourth electrode is comb-shaped, and the second electrode is arranged to mesh with the fourth electrode It is characterized by being.

  According to the present invention, four electrodes, a transmitter, a receiver, a terminal connected to each of the electrodes, a terminal connected to an output node of the transmitter, common to the transmitter and the receiver A switch having a terminal connected to a ground node and a terminal connected to each input node of the differential amplifier in the receiver and configured to be connectable between arbitrary terminals. It can be selected, so that stable and high communication quality can be obtained.

It is a circuit diagram which shows the electric field transceiver which concerns on this Embodiment. It is an exploded view which shows an example of the shape and arrangement | positioning of the electrodes 11-14. It is a circuit diagram which shows the 1st-4th usage example of the electric field transceiver shown in FIG. FIG. 8 is a circuit diagram illustrating fifth to eighth usage examples of the electric field transceiver illustrated in FIG. 1. It is an exploded view which shows an example of the shape and arrangement | positioning of the electrodes 11-14. It is an exploded view which shows an example of the shape and arrangement | positioning of the electrodes 11-14. It is an exploded view which shows an example of the shape and arrangement | positioning of the electrodes 11-14.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a circuit diagram showing an electric field transceiver according to the present embodiment.
The electric field transceiver includes four electrodes 11 to 14, a transmitter 1, a receiver 2, terminals 35 to 38 connected to each electrode, a terminal 31 connected to an output node of the transmitter 1, and a transmitter 1. And a terminal 32 connected to a ground node common to the receiver 1, a terminal 33 to a terminal 34 connected to each input node of a differential amplifier (not shown) in the receiver 2, and between any terminals. And a switch 3 configured to be connectable.

FIG. 2 is an exploded view showing an example of the shape and arrangement of the electrodes 11 to 14.
For example, as shown in the figure, the shape of the electrode 12 is the same as the shape of the electrode 11 and is a flat plate type, and the electrode 12 is arranged along the shape of the electrode 11 via the insulator 4. For example, as shown in the figure, the shape of the electrode 14 is the same as the shape of the electrode 13 and is a flat plate type, and the electrode 14 runs along the shape of the electrode 13 via the insulator 4.

FIG. 3A is a circuit diagram showing a first usage example of the electric field transceiver.
The terminals 31 and 35, the terminals 35 and 33, and the terminals 32 and 34 are connected by lead wires or the like and are electrically connected.

  The electric field transceiver shown in the figure performs communication using an electric field as follows. Here, as an example, communication using a human body as an electric field transmission medium will be described. The same applies to other use examples described below.

  For example, another electric field transceiver is carried by a person. A transmitter in the electric field transceiver (hereinafter referred to as “user electric field transceiver” for convenience) generates a data signal. The electric field transceiver for a user applies a data signal to the human body by an electrode of the user electric field transceiver. Thereby, the potential of the human body changes according to the data signal. When a person touches the electrode 11, the potential difference between the electrode 11 and the ground node changes according to the data signal. The receiver 2 receives this potential difference and extracts data.

  Conversely, the transmitter 1 generates a data signal. Thereby, the potential of the electrode 11 also changes according to the data signal. When a person touches the electrode 11, the electric field transceiver for the user retrieves data in the same manner as the electric field transceiver shown in the figure by the electrode that the user has.

FIG. 3B is a circuit diagram showing a second usage example of the electric field transceiver.
The terminals 31 and 35, the terminals 35 and 33, and the terminals 34 and 38 are connected by lead wires or the like and are electrically connected.

The electric field transceiver shown in the figure performs communication as follows.
Similar to the first usage example, the potential of the human body changes according to the data signal. When a person touches the electrode 11, the potential difference between the electrode 11 and the electrode 14 changes according to the data signal. The receiver 2 receives this potential difference and extracts data.

  Conversely, the transmitter 1 generates a data signal. Thereby, the potential of the electrode 11 also changes according to the data signal. When a person touches the electrode 11, the user electric field transceiver retrieves data as in the first use example.

FIG. 3C is a circuit diagram illustrating a third usage example of the electric field transceiver.
The terminals 31 and 35, the terminals 33 and 38, and the terminals 32 and 34 are connected by lead wires or the like and are electrically connected.

The electric field transceiver shown in the figure performs communication as follows.
Similar to the first usage example, the potential of the human body changes according to the data signal. When a person touches the electrode 13, the potential difference between the electrode 13 and the ground node changes in accordance with the data signal. The receiver 2 receives this potential difference and extracts data.

  Conversely, the transmitter 1 generates a data signal. Thereby, the potential of the electrode 11 also changes according to the data signal. When a person touches the electrode 11, the user electric field transceiver retrieves data as in the first use example.

FIG. 3D is a circuit diagram illustrating a fourth usage example of the electric field transceiver.
The terminals 31 and 35, the terminals 33 and 37, and the terminals 34 and 38 are connected by lead wires or the like and are electrically connected.

The electric field transceiver shown in the figure performs communication as follows.
Similar to the second usage example, the potential of the human body changes according to the data signal. When a person touches the electrode 13, the potential difference between the electrode 13 and the electrode 14 changes according to the data signal. The receiver 2 receives this potential difference and extracts data.

  Conversely, the electric field transceiver of FIG. 3 (d) transmits data to the electric field transceiver for the user, similar to the electric field transceiver of FIG. 3 (c).

FIG. 4A is a circuit diagram showing a fifth usage example of the electric field transceiver.
The terminals 31 and 35, the terminals 35 and 33, the terminals 32 and 34, and the terminals 34 and 36 are connected by lead wires or the like and are electrically connected.

The electric field transceiver shown in the figure performs communication using an electric field as follows.
Similar to the first usage example, the potential of the human body changes according to the data signal. When a person touches the electrode 11, the potential difference between the electrode 11 and the electrode 12 changes according to the data signal. Thereby, the potential difference between the electrode 11 and the ground node changes according to the data signal. The receiver 2 receives this potential difference and extracts data.

  Conversely, the transmitter 1 generates a data signal. Thereby, the potential difference between the electrode 11 and the ground node changes according to the data signal. Thereby, the potential difference between the electrode 11 and the electrode 12 also changes according to the data signal. When a person touches the electrode 11, the user electric field transceiver retrieves data as in the first use example.

FIG. 4B is a circuit diagram illustrating a sixth usage example of the electric field transceiver.
The terminals 31 and 35, the terminals 33 and 35, the terminals 32 and 36, and the terminals 34 and 38 are connected by lead wires or the like, and are electrically connected.

The electric field transceiver of the figure receives data from the electric field transceiver for a user using the electrode 11 and the electrode 14 as in the second usage example.
The electric field transceiver of the figure transmits data to the electric field transceiver for a user using the electrode 11 and the electrode 12 as in the fifth usage example.

FIG. 4C is a circuit diagram illustrating a seventh usage example of the electric field transceiver.
The terminals 31 and 35, the terminals 32 and 36, the terminals 32 and 34, and the terminals 33 and 37 are connected to each other by lead wires or the like, and are electrically connected.

The electric field transceiver of the figure uses the electrode 13 to receive data from the electric field transceiver for the user, as in the third usage example.
The electric field transceiver of the figure transmits data to the electric field transceiver for a user using the electrode 11 and the electrode 12 as in the fifth usage example.

FIG. 4D is a circuit diagram illustrating an eighth usage example of the electric field transceiver.
The terminals 31 and 35, the terminals 32 and 36, the terminals 33 and 37, and the terminals 34 and 38 are connected by a lead wire or the like, and are electrically connected.

The electric field transceiver of the figure receives data from the electric field transceiver for a user using the electrode 13 and the electrode 14 as in the fourth usage example.
The electric field transceiver of the figure transmits data to the electric field transceiver for a user using the electrode 11 and the electrode 12 as in the fifth usage example.

  For example, when data is transmitted using the fifth usage example, if the distance between the electrode 11 and the electrode 12 is long, they act as a transmission antenna and radiate radio waves (noise). Therefore, by adopting the arrangement shown in the figure, the distance between the electrodes can be shortened, and noise emission can be prevented.

  Further, when data is received using the fourth usage example, if the distance between the electrode 13 and the electrode 14 is long, they act as a receiving antenna, and radio waves (noise) enter. Therefore, by adopting the arrangement shown in the figure, the distance between the electrodes can be shortened, thereby preventing intrusion of noise.

  In addition, by adopting the arrangement shown in the figure, when the eighth usage example is employed to transmit and receive data, it is possible to prevent noise emission and to prevent noise intrusion.

FIG. 5 is an exploded view showing another example of the shape and arrangement of the electrodes 11 to 14.
The difference from the example of FIG. 2 is that each electrode has a comb shape, and the electrodes 11 and 13 are arranged to mesh with each other, and the electrodes 12 and 14 are arranged to mesh with each other.

  In the arrangement of FIG. 2, when transmitting data to the user electric field transceiver, a person must touch the location of the electrode 11, and when receiving data from the user electric field transceiver, the person must touch the location of the electrode 13. Therefore, if you touch the wrong place, you cannot communicate.

  Therefore, by adopting the arrangement shown in FIG. 5, it is possible to prevent the inconvenience that the electrode 11 and the electrode 13 can be arranged at substantially the same place, and communication cannot be performed due to the wrong place of touch.

  As shown in FIG. 6, the shape of the electrode 12 is different from the shape of the electrode 11, and may be a broken line type, for example. In this case, the electrode 12 is arrange | positioned so that a broken line may be drawn between the interdigitated comb-shaped electrode 11 and the electrode 13, for example.

  In addition, as shown in FIG. 7, an arrangement is adopted in which each tooth of the comb-shaped electrode 12 is positioned between the teeth of the interdigitated comb-shaped electrode 11 and the electrode 13.

  Therefore, according to the electric field transceiver according to the present embodiment, the four electrodes 11 to 14, the transmitter 1, the receiver 2, the terminals 35 to 38 connected to each electrode, and the output node of the transmitter 1 , A terminal 31 connected to a ground node common to the transmitter 1 and the receiver 1, a terminal 33 connected to each input node of a differential amplifier (not shown) in the receiver 2. Since the switch 3 having the terminal 34 and configured to be connectable between arbitrary terminals is provided, the electrode configuration can be selected as appropriate, and high communication quality can be stably obtained.

  In other words, even if the situation of the installation location of the electric field transceiver is unknown and it is not clear which of the usage examples 1 to 8 should be adopted, any terminal can be connected. Communication examples (S / N ratio etc.) can be measured with the circuits 1 to 8, and a usage example in which high communication quality is obtained can be adopted. In other words, high communication quality can be obtained stably regardless of the installation location.

  In addition, the shape of one electrode (first electrode) is equal to the shape of the other one electrode (second electrode), and the first electrode follows the shape of the second electrode through the insulator 4. Therefore, when data is transmitted using the fifth usage example, noise emission can be prevented. In addition, when data is received using the fourth usage example, intrusion of noise can be prevented.

  Further, the shape of the first electrode is equal to the shape of the second electrode, the first electrode is arranged along the shape of the second electrode via the insulator 4, and the third electrode Since the shape is equal to the shape of the fourth electrode and the third electrode is aligned along the shape of the fourth electrode, when transmitting and receiving data using the eighth usage example, noise emission is reduced. It is possible to prevent noise from entering.

  Each of the electrode 13 (first electrode), the electrode 14 (second electrode), and the electrode 11 (third electrode) has a comb shape, and the first electrode (13) is the second electrode (14). ), And the first electrode (13) is arranged in mesh with the third electrode (11), so that the first electrode (13) and the third electrode (11) are It can be arranged in almost the same place, and it is possible to prevent the inconvenience that communication becomes impossible due to a wrong place to touch.

1 Transmitter 2 Receiver 11-14 Electrode 31-38 Terminal 3 Switch

Claims (2)

A first electrode, a second electrode, a third electrode, and a fourth electrode;
A transmitter,
A receiver,
Terminals connected to the electrodes,
A terminal connected to the output node of the transmitter;
A terminal connected to a ground node common to the transmitter and the receiver;
A switch having a terminal connected to each input node of the differential amplifier in the receiver and configured to be connectable between arbitrary terminals ;
The switch connects a terminal connected to the output node of the transmitter to a terminal connected to the first electrode or the third electrode, and one terminal connected to each input node of the differential amplifier. To the third electrode or a terminal connected to the first electrode,
Each of the first electrode and the third electrode is comb-shaped,
The first electrode is disposed in mesh with the third electrode.
An electric field transceiver characterized by that. The switch has a terminal connected to the ground node connected to a terminal connected to the second electrode and the other terminal connected to each input node of the differential amplifier connected to the fourth electrode. Connected to the
  The second electrode is a comb shape or a polygonal line type, and the fourth electrode is a comb shape,
  The second electrode is disposed in mesh with the fourth electrode.
  The electric field transceiver according to claim 1.

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