HK1065455B - Vital information measuring apparatus - Google Patents

Description

Important information measuring apparatus

Technical Field

The present invention relates to an important information measuring apparatus that detects important information such as heart beat and transmits the information using radio waves.

Background

As an important information measuring apparatus, a heart rate meter has been used which is attached to a human body for measuring heart rate and radio-transmits measured heart rate data through an antenna.

Fig. 3 is a block diagram of a conventional heart beat meter. The heart beat meter has a pair of electrodes (electrode 301 on the positive side and electrode 302 on the negative side (ground side)) for detecting heart beats, a heart beat detection circuit 303, a Central Processing Unit (CPU)304, a Radio Frequency (RF) circuit 305, and an antenna 306.

The electrode 302 is grounded, and the electrode 301 is an electrode for electrically detecting and extracting the heart beat of the human body. The heartbeat detection circuit 303 detects the heartbeat of the user by detecting the voltage between the electrodes 301 and 302.

In the conventional heart beat meter, a heart beat signal generated between electrodes 301 and 302 connected to a human body is detected by a heart beat detection circuit 303 and output to a CPU 304. The CPU304 outputs the heartbeat signal to the radio frequency circuit 305 as heartbeat data and controls the radio frequency circuit 305 so that the radio frequency circuit 305 transmits the heartbeat data through the antenna 306.

Thus, heart beat data of the human body is transmitted from the antenna 306 to a host device (not shown) for performing various types of management, such as displaying heart beat data.

However, since the size of the electrodes 301 and 302 of the conventional heart beat meter is large, the radio wave signal output by the antenna 306 is absorbed by the electrode 301, which causes a problem: the efficiency of transmission using radio waves is reduced.

Important information measuring apparatuses having a configuration including an antenna for transmitting data and electrodes for detecting important information other than the heart beat meter also suffer from such a problem: the efficiency of data transmission using radio waves is degraded as described above.

Disclosure of Invention

An object of the present invention is to suppress a decrease in the efficiency of data transmission using radio waves in an important information measuring apparatus having important information detecting means for detecting important information, an antenna, and communication means for transmitting the important information detected by the important information detecting means through the antenna using radio waves.

According to the present invention, there is provided an important information measuring apparatus having important information detecting means for detecting important information, an antenna, and communication means for transmitting the important information detected by the important information detecting means through the antenna using radio waves, characterized in that: between the important information detecting means and the input portion of the communication device, suppressing means for suppressing input of the radio wave output through the antenna to the communication device through the important information detecting means is provided. The suppression means provided between the important information detection means and the communication means suppresses the entry of the signal from the antenna into the communication means.

The suppression means may be an inductor or a resistor.

Also, the inductor may be configured to have a self-resonant frequency higher than a frequency of a radio wave transmitted by the communication device through the antenna.

Also, the important information detecting device may be configured as an electrode, used by being connected to a human body, and used to detect the heartbeat of the human body.

According to the present invention, there is provided an important information measuring apparatus comprising:

important information detecting means for detecting important information;

an antenna separate from the important information detecting means;

communication means for transmitting the important information detected by the important information detecting means through an antenna using radio waves; and

suppression means for suppressing an input of the radio wave output by the antenna to the communication means through the important information detection means, wherein the suppression means is provided between the important information detection means and an input portion of the communication means.

According to the present invention, there is provided an important information measuring apparatus comprising:

an important information detection circuit for detecting important information;

an antenna separate from the vital information detection circuit;

a transceiver for transmitting the important information detected by the important information detecting circuit through an antenna using radio waves; and

and a suppression circuit for suppressing the radio wave output by the antenna from passing through the important information detection circuit to the input of the transceiver, wherein the suppression circuit is provided between the important information detection circuit and the input portion of the transceiver.

Drawings

The preferred embodiments of the present invention are illustrated by reference to the following figures, in which:

FIG. 1 is a block diagram of a heart beat meter according to a manner of carrying out the invention;

FIG. 2 is a front view of a heart beat meter according to a manner of carrying out the invention; and

fig. 3 is a block diagram of a conventional heart beat meter.

Detailed Description

Fig. 1 is a block diagram of an important information detecting apparatus according to a mode of carrying out the present invention, which shows an example of a heart beat meter applied by attaching to a user's body.

Fig. 2 is a front view of the important information detecting apparatus shown in fig. 1, and parts corresponding to those in fig. 1 are denoted by the same reference numerals.

In fig. 1 and 2, the heart beat meter has a pair of electrodes for detecting a heart beat as important information detection means (electrode 101 on the positive side and electrode 102 on the negative side (ground side)), inductor 103 as suppression means, communication circuit 104 as communication means, and antenna 110.

Inductor 103, communication circuit 104, and antenna 110 are housed within housing 201. The electrodes 101 and 102 are mounted on the housing 201 such that they are exposed to the outside of the housing 201 to allow them to come into contact with the human body.

The communication circuit 104 has a heart beat detection circuit 105, a Central Processing Unit (CPU)108, and a Radio Frequency (RF) circuit 109.

The electrodes 101 and 102 are used by being connected to a human body, and are electrodes for electrically detecting and extracting heart beats of the human body, and they are formed in a large configuration (for example, both the electrodes 101 and 102 are about 8 cm long). The electrode 102 is grounded, and the electrode 101 is an electrode for electrically detecting and extracting heart beats of the human body.

The heartbeat detection circuit 105 has an amplification circuit 106 for amplifying the heartbeat signal input from the electrode 101 through the inductor 103, and a waveform shaping circuit 107 for shaping the waveform of the heartbeat signal output by the amplification circuit 106. The heartbeat detection circuit 105 detects the heartbeat of the user by detecting the voltage between the electrodes 101 and 102.

The inductor 103 is connected between the electrode 101 and an input portion of the communication circuit 104. The inductance of inductor 103 has the function of: the heart beat signal detected by the electrodes 101 and 102 is allowed to reach the communication circuit 104 therethrough without any deterioration, and the signal input from the antenna 110 through the electrode 101 is suppressed. And the inductor 103 has a self-resonant frequency higher than the frequency of the radio wave transmitted by the communication circuit 104 through the antenna 110.

Therefore, the inductor 103 connected to the input portion of the communication circuit 104 suppresses the input of the signal in the frequency range of the radio wave transmitted by the communication circuit 104 to the communication circuit 104 through the antenna 110. Since a circuit capable of suppressing the radio wave output by the antenna 110 from passing through the electrode 101 to the input of the communication circuit 104 is sufficient as the inductor 103, the inductor 103 is not necessarily used, and for example, a resistor may be used. However, inductors are preferred over resistors when matching of the input impedance of the communication circuit 104 must be considered.

In the heart beat meter having the configuration as described above, the heart beat circuit 105 detects a heart beat signal generated between the electrodes 101 and 102 connected to the human body and outputs the signal to the CPU 108. The CPU108 outputs a heartbeat signal to the radio frequency circuit 109 as heartbeat data and controls the radio frequency circuit 109 so that the radio frequency circuit 109 transmits the heartbeat data through the antenna 110.

Therefore, heartbeat data of the human body is transmitted from the antenna 110 to a host device (not shown) using radio waves for various types of management, such as display of heartbeat data.

At this time, the radio wave signal output by the antenna 110 is received by the electrode 101 and attracted to be input to the communication circuit 104, but the inductor 103 suppresses the input of the signal received by the electrode 101 from the antenna 110 to the communication circuit 104. This makes it possible to suppress loss of the radio wave signal output from the antenna 110 in the communication circuit 104, and thus, it is possible to suppress a decrease in the efficiency of transmitting data from the heart beat meter using radio waves.

As described above, the important information measuring apparatus (e.g., heart beat meter) according to the present mode of carrying out the invention is an important information measuring apparatus having important information detecting means (e.g., a pair of electrodes 101 and 102) for detecting important information (e.g., heart beat information), an antenna 110, and a communication circuit 104 which transmits the important information detected by the important information detecting means through the antenna 110 using radio waves, characterized in that suppressing means (e.g., an inductor 103 or a resistor) for suppressing the input of the radio waves output by the antenna 110 to the communication circuit 104 through the important information detecting means is provided between the important information detecting means and an input portion of the communication circuit 104. Therefore, when important information is transmitted from the communication circuit 104 through the antenna 110 using radio waves, it is possible to suppress a decrease in the efficiency of data transmission.

Although the present mode of carrying out the present invention has been described using the example of a heart beat meter, the present invention can be applied to an important information measuring apparatus that measures various types of important information such as blood pressure.

The important information measuring apparatus according to the present invention makes it possible to suppress a decrease in transmission efficiency when transmitting measured data using radio waves.

Claims (6)

1. An important information measuring apparatus comprising:

important information detecting means for detecting important information;

an antenna separate from the important information detecting means;

communication means for transmitting the important information detected by the important information detecting means through an antenna using radio waves; and

suppression means for suppressing an input of the radio wave output by the antenna to the communication means through the important information detection means, wherein the suppression means is provided between the important information detection means and an input portion of the communication means.

2. The important information measuring apparatus according to claim 1, wherein the suppressing means is an inductor.

3. The important information measuring apparatus according to claim 1, wherein the suppressing means is a resistor.

4. The important information measuring apparatus according to claim 2, wherein the inductor has a self-resonant frequency higher than a frequency of a radio wave transmitted by the communication device through the antenna.

5. The important information measuring apparatus according to claim 1, wherein the important information detecting means is an electrode which is used by being connected to a human body and is used for detecting a heart beat of the human body.

6. An important information measuring apparatus comprising:

an important information detection circuit for detecting important information;

an antenna separate from the vital information detection circuit;

a transceiver for transmitting the important information detected by the important information detecting circuit through an antenna using radio waves; and

and a suppression circuit for suppressing the radio wave output by the antenna from passing through the important information detection circuit to the input of the transceiver, wherein the suppression circuit is provided between the important information detection circuit and the input portion of the transceiver.