JP2005192699A - Information transmitter and information transmitting system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To try to reduce the electric power consumption of an information transmitter which is attached to a human body and transmits the information to a separate information processor. <P>SOLUTION: An information transmitting system 1 transmits data from the information transmitter 2 which can be attached to the human body to the information processor 3, wherein, when a change of an electrostatic capacity or a change of a motion or a vibration of a muscle is detected by a sensor 22 which detects the change of the electrostatic capacity around the human body attached by the information transmitter 2 or the change of the motion or the vibration of the muscle, a communication starting signal is outputted from the information transmitter 2 to the information processor 3. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an information transmission apparatus and an information transmission system that are worn on a human body and transmit information to another information processing apparatus.

  In recent years, information transmission devices (wearable devices) that are used while worn on a human body have become widespread (see, for example, Patent Document 1). For example, using a wristwatch-type wearable device, entry management for permitting entry of only registered persons is performed.

  Conventionally, when a wearable device starts communication with another device, it is necessary to perform an instruction operation such as pressing a button provided on the wearable device, which is a troublesome operation. It is desirable for wearable devices to function without being particularly aware that humans are wearing them.

Therefore, a method is used in which a signal indicating the start of communication is output from the wearable device at a constant time interval and communication is performed only when there is a response to the signal. In this case, since a special instruction operation for starting communication is not required, there is an advantage that humans do not feel bothered.
JP 2003-37566 A

  However, in the above method, since the wearable device continuously outputs a signal indicating the start of communication, power is consumed even when the original communication operation is not performed. Since the wearable device is worn on the human body, it is difficult to always supply power from the outside, and it is important to save power.

  The present invention has been made in view of the above problems in the prior art, and an object of the present invention is to save power in an information transmission apparatus that is worn on a human body and transmits information to another information processing apparatus.

  According to the first aspect of the present invention, in an information transmission device that is worn on a human body and transmits information to another information processing device, a transitional physical quantity change caused by the movement of the human body on which the information transmission device is worn is detected. A movement change detecting means for outputting a detection signal in response to the detection signal from the movement change detecting means, a control means for activating a power supply means of the information transmission device, and a power supply from the power supply means. And a communication means for receiving and outputting a communication start signal for the other information processing apparatus.

  According to a second aspect of the present invention, in the information transmission device according to the first aspect, the movement change detecting means detects a change in capacitance around a human body on which the information transmission device is mounted. Yes.

  According to a third aspect of the present invention, in the information transmission device according to the second aspect, the movement change detecting means includes a pair of electrodes that are in electrical contact with the human body at a predetermined interval, and the pair of electrodes. And a detection circuit that generates a detection signal in response to a change in the obtained capacitance.

  According to a fourth aspect of the present invention, in the information transmission device according to the second aspect, the movement change detecting means includes an electrode that is in electrical contact with the human body and a capacitance between the electrode and the ground potential. And a detection circuit for generating a detection signal in response to the change.

  According to a fifth aspect of the present invention, in the information transmission device according to the first aspect, the movement change detecting means detects a change in movement or vibration of a muscle of a human body on which the information transmission device is mounted. It is said.

  According to a sixth aspect of the present invention, in the information transmission device according to the fifth aspect, the movement change detecting means changes its resistance value in accordance with the movement or vibration of the muscle of the human body on which the information transmission device is mounted. And a detection circuit that generates a detection signal in response to a change in the resistance value of the strain gauge.

  According to a seventh aspect of the present invention, in the information transmission device according to the fifth aspect, the movement change detecting means changes an output voltage in accordance with a movement or vibration of a muscle of a human body on which the information transmission device is mounted. And a detection circuit that generates a detection signal in response to a change in the output voltage of the piezoelectric element.

  According to an eighth aspect of the present invention, there is provided an information transmission system for transmitting information from an information transmission device worn on a human body to another information processing device, wherein the information transmission device is a motion of a human body on which the information transmission device is worn. A motion change detecting means for detecting a transitional physical quantity change caused by the output and outputting a detection signal; and a control means for starting the power supply means of the information transmission device based on the detection signal from the motion change detecting means; And a communication means for receiving a supply of power from the power supply means and outputting a communication start signal to the other information processing apparatus.

  According to the first aspect of the present invention, a transitional physical quantity change caused by the movement of the human body on which the information transmission apparatus is mounted is detected and a detection signal is output. Based on the detection signal, the information transmission apparatus Since the power supply means is activated and the power supply from the power supply means is received and a communication start signal is output to another information processing apparatus, power consumption when the communication operation is not performed can be suppressed. Electricity can be achieved.

  According to the second aspect of the present invention, a change in electrostatic capacitance around the human body on which the information transmission device is mounted is detected and a detection signal is output. Based on this detection signal, the power supply means of the information transmission device Is activated and outputs a communication start signal to another information processing apparatus in response to the supply of power from the power supply means, so that power consumption when communication operation is not performed can be suppressed, and power saving can be achieved. Can be planned.

  According to the third aspect of the present invention, it is possible to output a detection signal corresponding to a change in capacitance obtained by a pair of electrodes that are in electrical contact with the human body at a predetermined interval.

  According to the fourth aspect of the present invention, it is possible to output a detection signal corresponding to a change in capacitance between the electrode that is in electrical contact with the human body and the ground potential.

  According to the fifth aspect of the present invention, a change in the motion or vibration of the human body to which the information transmission device is mounted is detected and a detection signal is output, and the power supply of the information transmission device is based on the detection signal. Starting the means and receiving the supply of power from the power supply means and outputting a communication start signal to another information processing apparatus, it is possible to suppress power consumption when communication operation is not performed, and to save power Can be achieved.

  According to the sixth aspect of the present invention, the detection signal is generated in response to a change in the resistance value of the strain gauge arranged so that the resistance value changes in accordance with the movement or vibration of the muscle of the human body on which the information transmission device is mounted. Can be output.

  According to the seventh aspect of the invention, the detection signal corresponding to the change in the output voltage of the piezoelectric element arranged so that the output voltage changes in accordance with the movement or vibration of the muscle of the human body on which the information transmission device is mounted. Can be output.

  According to the eighth aspect of the present invention, a transitional physical quantity change caused by the movement of the human body on which the information transmission device is mounted is detected and a detection signal is output. Based on the detection signal, the information transmission device Since the power supply means is activated and the power supply from the power supply means is received and a communication start signal is output to another information processing apparatus, power consumption when the communication operation is not performed can be suppressed. Electricity can be achieved.

[First Embodiment]
First, an information transmission system 1 according to a first embodiment of the present invention will be described with reference to FIGS. However, the scope of the invention is not limited to the illustrated examples.
FIG. 1 is a schematic diagram illustrating an information transmission system 1 according to the first embodiment.
As shown in FIG. 1, the information transmission system 1 includes an information transmission device 2 and an information processing device 3, and transmits information according to the purpose from the information transmission device 2 to the information processing device 3.

  As shown in FIG. 1, the information transmission device 2 is configured to be worn on a human body. Here, a wristwatch type (band wearing type) information transmission device 2 will be described as an example. The information transmission device 2 may be provided with a function as a wristwatch. In the information transmission apparatus 2, the main body 21 and the sensor 22 are connected by a signal line 23.

FIG. 2 shows a functional configuration of the information transmission apparatus 2.
As illustrated in FIG. 2, the information transmission device 2 includes a CPU (Central Processing Unit) 24, an information processing unit 25, a communication unit 26, a power supply 27, and a sensor 22.

  The CPU 24 comprehensively controls each unit of the information transmission apparatus 2. The CPU 24 develops a designated program from various programs stored in a ROM (Read Only Memory) (not shown) in a work area of a RAM (Random Access Memory) (not shown), and performs various processes in cooperation with the program. And the processing result is stored in a predetermined area of the RAM.

  The information processing unit 25 performs information processing according to the purpose of the information transmission device 2 under the control of the CPU 24.

  The communication unit 26 transmits / receives data to / from the information processing device 3 in accordance with the purpose of the information transmission device 2. As for the communication method, communication may be performed wirelessly using the air as a route, or communication may be performed using the human body as a transmission path.

  The power source 27 is configured by a battery or a rechargeable battery, and supplies power to each unit.

  FIG. 3 is a block diagram of the sensor 22. As shown in FIG. 3, the sensor 22 includes a physical quantity detection unit 221, a physical quantity / electric signal conversion unit 222, and a comparison unit 223.

  The physical quantity detection unit 221 detects a transient physical quantity change caused by the movement of the person wearing the information transmission device 2. The physical quantity / electrical signal converter 222 converts the physical quantity detected by the physical quantity detector 221 into an electrical signal. The comparison unit 223 includes a comparator, compares the electric signal value converted by the physical quantity / electrical signal conversion unit 222 with a predetermined threshold value, and the electric signal value is equal to or greater than the threshold value (or less than the threshold value). In some cases, a detection signal is output to the CPU 24.

  In the first embodiment, a case will be described in which a change in capacitance is detected as a physical quantity. The human body wearing the information transmission device 2 is used as a part of the circuit of the sensor 22, and communication is started based on the change in capacitance. The electrostatic capacitance around the human body changes greatly when the human body touches another object (including a human body other than the person). Another object may be an insulator or a metal. Here, the case where the hand touches another object in each part of the human body will be described. Therefore, as shown in FIG. 1, the sensor 22 should be installed as close to the hand as possible so that a change in capacitance can be easily detected. Is preferred.

FIG. 4 shows a circuit configuration of the capacitance change detection circuit 4 that functions as the physical quantity detection unit 221 and the physical quantity / electrical signal conversion unit 222. An AC voltage e _in is obtained by an AC signal source 41 that is supplied with power from the power source 27 and generates an AC signal having a certain frequency. In the bridge circuit as shown in FIG. 4, the resistance values of the resistors are R ₁ , R ₂ , R ₃ , R ₄ , the capacitances of the capacitors are C ₁ , C ₂ , and the angular frequency of the AC voltage e _in is ω. Then, the impedance Z ₁ , Z ₂ , Z ₃ , Z ₄ of each side is
Z ₁ = R ₁ + 1 / jωC ₁
Z ₂ = R ₂ + 1 / jωC ₂
Z ₃ = R ₃
Z ₄ = R ₄
It becomes.

As shown in FIG. 4, the metal electrodes 42 and 43 are provided on the surface of the sensor 22 that contacts the human body (arm) at a predetermined interval, and a capacitor having a capacitance C ₁ is configured using the human body. Is done. Further, the capacitor having the electrostatic capacity C ₂ is constituted by a variable capacitor (variable capacitor) and a variable capacitance diode (varicap).

The impedance of each side is set so that Z ₁ Z ₃ = Z ₂ Z ₄ when the human body (hand) is not touching anything. However, since the human body is used in a circuit, the capacitance always changes slightly depending on the surrounding environment even when the human body is not touching another object. Therefore, since it is difficult to completely match Z ₁ Z ₃ and Z ₂ Z ₄ , it is sufficient to set approximately Z ₁ Z ₃ ≈Z ₂ Z ₄ . In this case, Z ₁ Z ₃ ≠ Z ₂ Z ₄ and the output voltage V _out ≠ 0. However, the voltage is sufficiently smaller than the output when the human body touches another object. This can be dealt with by adjusting the threshold voltage.

When the hand is not touching another object, the capacitance change detection circuit 4 is Z ₁ Z ₃ = Z ₂ Z ₄ , the bridge circuit is in an equilibrium state, and the output voltage V _out = 0.

When a person wearing the information transmission device 2 touches another object by hand, the capacitance C ₁ changes, the balance of the bridge circuit is lost, and the output voltage V _out ≠ 0.

The comparison unit 223 compares the output voltage V _out with a predetermined threshold, and outputs “1” as a detection signal to the CPU 24 when the output voltage V _out is equal to or greater than the threshold. When the output voltage V _out is less than the threshold value, “0” is output to the CPU 24.

  When the value output from the comparison unit 223 of the sensor 22 is “1”, the CPU 24 supplies power from the power supply 27 to the information processing unit 25 and the communication unit 26, and the communication unit 26 supplies the information processing device 3 to the information processing device 3. A communication start signal is output. Then, data communication between the information transmission device 2 and the information processing device 3 is started.

The resistance values R ₁ and R ₂ are usually the same for simplicity, but different values may be used as long as they can be balanced.

In addition, Z ₃ and Z ₄ are also pure resistances for simplicity of explanation, but capacitive impedance and inductive impedance may be used depending on circumstances.

  Depending on the surrounding environment, the change in capacitance may be small, but this can be dealt with by using a high-frequency power source (signal source).

  The information processing device 3 includes a communication unit that transmits / receives data, a storage unit that stores data, a control unit that controls them, and the like, and performs data communication with the information transmission device 2.

  According to the information transmission system 1 of the first embodiment, a change in electrostatic capacitance around a human body due to the human body on which the information transmission device 2 is worn coming into contact with another object is detected. Is detected, the information transmission device 2 outputs a communication start signal to the information processing device 3, so that the information transmission device 2, the information processing device 3, Can initiate data communication. Therefore, power consumption when the communication operation is not performed can be suppressed, and power saving can be achieved.

  For example, when the information transmission system 1 is applied to an entrance management system that allows only registered persons to enter the room, the registrant wearing the information transmission device 2 touches the door knob or a dedicated button at the entrance. Communication between the information transmission device 2 and the information processing device 3 in the vicinity of the door is performed, and after confirming that the person is an official registrant, the door may be opened. Thereby, it is not necessary to continuously output a signal for starting communication from the information transmission apparatus 2, and it is not necessary to provide a communication start button on the information transmission apparatus 2 side.

  In the first embodiment, the information transmission device 2 is described in which the human body touches another object and the hand is attached to the vicinity of the arm. However, the mounting position of the sensor 22 is not limited to this. , Near the foot or other position.

[Second Embodiment]
Next, a second embodiment of the present invention will be described.
The information transmission system according to the second embodiment is different from the information transmission system 1 according to the first embodiment except that the circuit configuration used for detecting the physical quantity is different and the other parts are the same. Are denoted by the same reference numerals, and illustration and description thereof are omitted. Hereinafter, a characteristic configuration of the second embodiment will be described.

  Also in the second embodiment, a case will be described in which a part where a human body touches another object is a hand, and a change in capacitance due to the hand touching another object is detected.

  FIG. 5 shows a circuit configuration of the capacitance change detection circuit 5 that functions as the physical quantity detection unit 221 and the physical quantity / electrical signal conversion unit 222.

  The metal electrode 51 is in electrical contact with the human body on which the information transmission device 2 is mounted. As a result, the human body is inserted as a capacitor between the metal electrode 51 and the ground potential (ground). When the hand is not touching another object, the capacitance between the metal electrode 51 and the ground is only the capacitance of the human body. Here, when a person touches another object with his / her hand, the capacitance of the other object is inserted.

  As shown in FIG. 5, the square wave generated by the square wave generation source 52 is input to the AND circuit 54 via the phase adjuster 53. Here, the phase adjuster 53 is configured using a variable capacitor, a variable capacitor, or the like, and the capacitance can be changed. The two signals A and B input to the AND circuit 54 are adjusted by the phase adjuster 53 to have a phase difference of 180 degrees.

  With this configuration, as shown in FIG. 6 (a), since the input signal A and the input signal B are input in opposite phases, there is a time during which both the input signals A and B are at the H (high) level. do not do. Therefore, the signal C output from the AND circuit 54 through the inverter 55 is always at the L (low) level.

When a person wearing the information transmission apparatus 2 touches another object with his / her hand, the capacitance of another object is added in addition to the capacitance of the human body. In this case, as shown in FIG. 6 (b), a phase delay occurs in the waveform of the input signal A, and the time when both the input signals A and B become H level, that is, the time when the output signal C becomes H level. Occur. Therefore, when the output signal C becomes H level, the output voltage _Vout changes.

The comparison unit 223 compares the output voltage V _out with a predetermined threshold value, and outputs “1” as a detection signal to the CPU 24 when the output voltage V _out is equal to or lower than the threshold value. When the output voltage V _out is larger than the threshold value, “0” is output to the CPU 24. In the circuit configuration of FIG. 5, when the human body on which the information transmission device 2 is attached contacts another object, the output voltage V _out becomes “0”, and the output of the comparison unit 223 becomes “1”. When the human body on which the information transmission device 2 is mounted is not in contact with another object, the output voltage _Vout is “1”, and the output of the comparison unit 223 is “0”.

  Therefore, when the value output from the comparison unit 223 of the sensor 22 is “1”, the CPU 24 supplies power from the power supply 27 to the information processing unit 25 and the communication unit 26, and the communication unit 26 transmits information to the information processing device. 3 is output. Then, data communication between the information transmission device 2 and the information processing device 3 is started.

  According to the information transmission system of the second embodiment, a change in electrostatic capacitance around the human body due to the human body on which the information transmission device 2 is attached contacts another object is detected, and the change in electrostatic capacitance is detected. When it is detected, a communication start signal is output from the information transmission device 2 to the information processing device 3, so that the information transmission device 2 and the information processing device 3 are triggered by the contact of the human body with another object. Data communication between them can be started. Therefore, power consumption when the communication operation is not performed can be suppressed, and power saving can be achieved.

  In the second embodiment, the circuit configuration as shown in FIG. 5 is used. However, in order to simplify the circuit, even in the circuit configuration from the metal electrode 51 to the inverter 55 in FIG. It can be sufficiently used as a circuit for detecting. That is, the start of communication may be determined based on the change in the output signal C. In this case, when the output signal C output from the inverter 55 is at the H level, the CPU 24 supplies power from the power supply 27 to the information processing unit 25 and the communication unit 26, and the communication unit 26 supplies the information processing device 3 to the information processing device 3. A communication start signal is output. Then, data communication between the information transmission device 2 and the information processing device 3 is started.

  Further, in the second embodiment, the information transmission apparatus 2 is described in which the human body touches another object and the hand is attached to the vicinity of the arm. However, the mounting position of the sensor 22 is not limited to this. , Near the foot or other position.

[Third Embodiment]
Next, a third embodiment of the present invention will be described.
Usually, when a person shakes hands, grasps something, or performs an operation such as pressing a button, a change occurs in the shape of arm muscles. In the third embodiment, an information transmission system 6 that starts communication based on a shape change caused by the movement of arm muscles will be described.

FIG. 7 is a schematic diagram illustrating an information transmission system 6 according to the third embodiment.
As illustrated in FIG. 7, the information transmission system 6 includes an information transmission device 2 and an information processing device 3, and transmits information according to the purpose from the information transmission device 2 to the information processing device 3. In the information transmission apparatus 2, the main body 21 and the sensor 22 are connected by a signal line 23.

  The information transmission system 6 according to the third embodiment is different from the information transmission system 1 according to the first embodiment except that the circuit configuration used for detecting the physical quantity is different and the other parts are the same. Are denoted by the same reference numerals, and illustration and description thereof are omitted. Hereinafter, a characteristic configuration of the third embodiment will be described.

  In the third embodiment, a case will be described in which a change in muscle shape of a human body is detected using a strain gauge. A strain gauge is an element that detects a strain, which is a mechanical minute change, as an electrical signal. The shape of the muscle changes greatly when a person performs a motion such as shaking hands, grasping something, or pressing a button. Muscles that change when performing these actions are easier to detect near the elbow than near the wrist. Therefore, as shown in FIG. 7, it is preferable to install the sensor 22 at a position where it is easy to detect a change in muscle.

  The physical quantity detector 221 of the sensor 22 detects a change in muscle shape as a physical quantity using a strain gauge. The physical quantity / electrical signal converter 222 converts a change in the resistance value of the strain gauge into an electric signal using a bridge circuit. The comparison unit 223 compares the electrical signal value converted by the physical quantity / electrical signal conversion unit 222 with a predetermined threshold value, and outputs a detection signal to the CPU 24 when the electrical signal value is equal to or greater than the threshold value. To do.

FIG. 8 shows a circuit configuration of the resistance value change detection circuit 7 that functions as the physical quantity detection unit 221 and the physical quantity / electrical signal conversion unit 222.
In the resistance value change detecting circuit 7 in FIG. 8, for simplicity of explanation, the DC power source E using _in the power (may be an AC.), R _1, respectively the resistance value of the resistance of each side of the bridge circuit R _2, and R _3, R _4. A bridge circuit is configured using a strain gauge in at least one of R ₁ , R ₂ , R ₃ , and R ₄ .

Normally, a strain gauge is used for any one of R ₁ , R ₂ , R ₃ , and R ₄ , but it is not necessary to use one, and a number of strain gauges may be used. When a circuit is configured using a large number of strain gauges, not only is it easy to detect changes in muscle shape, but it is also possible to detect changes in muscle shape in multiple directions, so adjust the placement of each strain gauge. Therefore, it is possible to distinguish the handshake operation and the button press operation.

In the resistance value change detection circuit 7, the resistance value of each side is set so that R ₁ R ₃ = R ₂ R ₄ in a state where the user does not shake hands or press the button. . R ₂ , R ₃ , and R ₄ can be configured by pure resistors. However, in order to cope with various situations, if a configuration in which variable resistors and the like are connected in series so that the balance of the bridge circuit can be adjusted, Convenient.

Here, a case where a strain gauge is used only for R ₁ will be described. As shown in FIG. 9 (a), R ₁ maintains a constant resistance value during normal operation, that is, when there is no change in muscle shape. As shown in FIG. 9B, when the shape of the muscle changes due to an operation such as shaking hands or pressing a button, the resistance value R ₁ changes due to the change in the shape of the strain gauge. As shown in FIG. 9, the strain gauge is arranged so that a change in muscle can be detected.

When a person is not shaking hands or pressing a button, R ₁ R ₃ = R ₂ R ₄ , and the bridge circuit is in an equilibrium state. Here, the output voltage V _out = 0.

Then, when the person wearing the information transmission device 2 performs an operation such as shaking hands or pressing a button, the resistance value R ₁ of the strain gauge changes. Due to this change, the bridge circuit is unbalanced and the output voltage V _out ≠ 0.

The comparison unit 223 compares the output voltage V _out with a predetermined threshold, and outputs “1” as a detection signal to the CPU 24 when the output voltage V _out is equal to or greater than the threshold. When the output voltage V _out is less than the threshold value, “0” is output to the CPU 24. When the change in the output voltage _Vout is small, a voltage may be output to the comparison unit 223 via an amplifier.

  When the value output from the comparison unit 223 of the sensor 22 is “1”, the CPU 24 supplies power from the power supply 27 to the information processing unit 25 and the communication unit 26, and the communication unit 26 supplies the information processing device 3 to the information processing device 3. A communication start signal is output. Then, data communication between the information transmission device 2 and the information processing device 3 is started.

  According to the information transmission system 6 of the third embodiment, the information transmission device 2 is detected when a change in the muscular motion of the human body to which the information transmission device 2 is attached is detected. Output a communication start signal to the information processing device 3 from the information transmission device 2 and the information processing device 3 triggered by a predetermined action such as shaking hands or pressing a button. Can initiate data communication. Therefore, power consumption when the communication operation is not performed can be suppressed, and power saving can be achieved.

  Note that here, the information transmission device 2 that is worn near the arm has been described as an example, focusing on the action of a person shaking hands or pressing a button, but the mounting position of the sensor 22 is not limited to this. , Near the foot or other position.

  Further, the strain detected using the strain gauge may be not only due to a change in muscle movement, but also due to vibration generated when performing a predetermined action.

[Fourth Embodiment]
Next, a fourth embodiment of the present invention will be described.
The information transmission system according to the fourth embodiment is different from the information transmission system 6 according to the third embodiment except for the circuit configuration used for detecting the physical quantity, and the other parts are the same. Are denoted by the same reference numerals, and illustration and description thereof are omitted. Hereinafter, a characteristic configuration of the fourth embodiment will be described.

  In the fourth embodiment, a case will be described in which a change in muscle shape of a human body is detected using a piezoelectric element. Also in the fourth embodiment, it is preferable to install the sensor 22 at a position close to the elbow as shown in FIG. 7 in order to easily detect a change in the shape of the muscle.

  As shown in FIG. 10, the sensor 22 includes a physical quantity detection unit 224, a physical quantity / electric signal conversion unit 225, and a comparison unit 226.

  The physical quantity detector 224 detects a change in muscle shape as a physical quantity using a piezoelectric element. The physical quantity / electrical signal conversion unit 225 accumulates electric charge in the capacitor as a change in the piezoelectric element, and generates an electric signal using the electric charge accumulated in the capacitor or the voltage value across the capacitor. The comparison unit 226 includes a comparator, and compares the electrical signal value converted by the physical quantity / electrical signal conversion unit 225 with a predetermined threshold value. When the electrical signal value is equal to or greater than the threshold value, the CPU 24 Output a detection signal.

  A simple physical quantity / electrical signal conversion unit 225 can be configured with only a capacitor for storing generated charges and a switching transistor.

  When a person is not shaking hands or pressing a button, there is no charge amount change or voltage value change due to the piezoelectric element.

  When a person wearing the information transmission device 2 performs an operation such as shaking hands or pressing a button, pressure is applied to the piezoelectric element to generate electric charge. As a result, the charge amount or voltage value changes.

  The comparison unit 226 compares the change in charge amount or voltage value with a predetermined threshold value, and when the change in charge amount or voltage value is equal to or greater than the threshold value, sets “1” as a detection signal to the CPU 24. Output. If the change in the charge amount or voltage value is less than the threshold, “0” is output to the CPU 24.

  When the value output from the comparison unit 226 of the sensor 22 is “1”, the CPU 24 supplies the power from the power source 27 to the information processing unit 25 and the communication unit 26, and the communication unit 26 applies the information to the information processing device 3. A communication start signal is output. Then, data communication between the information transmission device 2 and the information processing device 3 is started.

  According to the information transmission system of the fourth embodiment, when a change in muscle movement of a human body to which the information transmission apparatus 2 is attached is detected, and a change in muscle movement is detected, the information transmission apparatus 2 Since a communication start signal is output to the information processing device 3, the information transmission device 2 and the information processing device 3 are triggered by a predetermined operation such as a handshake of a human body or pressing of a button. Data communication between them can be started. Therefore, power consumption when the communication operation is not performed can be suppressed, and power saving can be achieved.

  In addition, paying attention to the movement of a person shaking hands or pressing a button, the information transmission apparatus 2 mounted near the arm has been described as an example, but the mounting position of the sensor 22 is not limited to this, and the vicinity of the foot Or other positions.

  The description in each of the above embodiments is an example of a suitable information transmission system according to the present invention, and the present invention is not limited to this. The detailed configuration and detailed operation of each device constituting the information transmission system can be appropriately changed without departing from the spirit of the present invention.

  For example, in each of the above-described embodiments, the sensor 22 that detects capacitance, muscle movement, vibration, and strain is provided separately from the main body 21 of the information transmission device 2. It may be configured to be built in the main body 21.

  In each of the above embodiments, the wristwatch-type information transmission device 2 has been described. However, the present invention is not limited to this, and the headphone-type information transmission device or the head portion is mounted like a pair of glasses and attached to the lens portion. It may be a head-mounted display that displays an image, a PDA that can be mounted on a human body, or the like.

It is the schematic which shows the information transmission system 1 of 1st Embodiment. 3 is a block diagram showing a functional configuration of an information transmission device 2. FIG. 3 is a block diagram of a sensor 22. FIG. 3 is a circuit configuration diagram of a capacitance change detection circuit 4. FIG. 3 is a circuit configuration diagram of a capacitance change detection circuit 5. FIG. 4 is a waveform diagram of input signals A and B and an output signal C in the capacitance change detection circuit 5. FIG. It is the schematic which shows the information transmission system 6 of 3rd Embodiment. 3 is a circuit configuration diagram of a resistance value change detection circuit 7. FIG. It is a figure for demonstrating the change of the strain gauge with respect to the change of a human body. 3 is a block diagram of a sensor 22. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Information transmission system 2 Information transmission apparatus 21 Main body part 22 Sensor 221 Physical quantity detection part 222 Physical quantity / electrical signal conversion part 223 Comparison part 224 Physical quantity detection part 225 Physical quantity / electrical signal conversion part 226 Comparison part 23 Signal line 24 CPU
DESCRIPTION OF SYMBOLS 25 Information processing part 26 Communication part 27 Power supply 3 Information processing apparatus 4 Capacitance change detection circuit 41 AC signal source 42,43 Metal electrode 5 Capacitance change detection circuit 51 Metal electrode 52 Square wave generation source 53 Phase adjuster 54 AND Circuit 55 Inverter 6 Information transmission system 7 Resistance value change detection circuit

Claims (8)

In an information transmission device that is mounted on a human body and transmits information to another information processing device,
A movement change detecting means for detecting a transitional physical quantity change caused by movement of a human body to which the information transmission device is mounted and outputting a detection signal;
Based on a detection signal from the motion change detection means, a control means for starting the power supply means of the information transmission device;
A communication means for receiving a supply of power from the power supply means and outputting a communication start signal to the other information processing apparatus;
An information transmission device comprising: The information transmission apparatus according to claim 1,
The movement change detecting means detects a change in capacitance around a human body to which the information transmission apparatus is attached. The information transmission apparatus according to claim 2,
The movement change detecting means includes a pair of electrodes that are in electrical contact with the human body at a predetermined interval, and a detection circuit that generates a detection signal in response to a change in capacitance obtained by the pair of electrodes. An information transmission apparatus characterized by that. The information transmission apparatus according to claim 2,
The movement change detecting means includes an electrode that is in electrical contact with a human body and a detection circuit that generates a detection signal in response to a change in capacitance between the electrode and the ground potential. Transmission equipment. The information transmission apparatus according to claim 1,
The movement change detecting means detects movement or vibration change of a human muscle to which the information transmission apparatus is attached. The information transmission device according to claim 5,
The movement change detecting means is a strain gauge arranged so that the resistance value changes in accordance with the movement or vibration of the human muscle to which the information transmission device is mounted, and detects corresponding to the resistance value change of the strain gauge. And a detection circuit for generating a signal. The information transmission device according to claim 5,
The movement change detecting means includes a piezoelectric element arranged so that an output voltage changes in accordance with movement or vibration of a human muscle to which the information transmission device is mounted, and a change in the output voltage of the piezoelectric element. And a detection circuit for generating a detection signal. In an information transmission system for transmitting information from an information transmission device attached to a human body to another information processing device,
The information transmission device includes:
A movement change detecting means for detecting a transitional physical quantity change caused by movement of a human body to which the information transmission device is mounted and outputting a detection signal;
Based on a detection signal from the motion change detection means, a control means for starting the power supply means of the information transmission device;
A communication means for receiving a supply of power from the power supply means and outputting a communication start signal to the other information processing apparatus;
An information transmission system comprising:

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