JP3107246U - Two-contact terminal heart rate rhythm measuring device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a two-contact terminal type heart rate rhythm measuring device in which the problem of poor contact is greatly reduced and the reliability of measurement is increased.
SOLUTION: Two contact terminals 10A, a contact terminal 10B, an amplification and noise filter circuit 20, a waveform conversion circuit 30, and a processing and output circuit 41 are provided. Two of the contact terminals 10 are electrically conductive and come into contact with both hands or both feet to be measured. The amplification and noise filter circuit 20 amplifies the pulsation portion by the voltage signal obtained by measuring between the two contact terminals 10, filters out noise, and the waveform conversion circuit 30 outputs the output of the amplification and noise filter circuit 20. The signal is converted into a square wave, and the processing and output circuit 40 receives the output signal of the waveform conversion circuit 30, performs arithmetic processing with a specific program, calculates an average rhythm that generates a wave peak of the output signal, and displays the rhythm value as a display unit Display by outputting to.
[Selection] Figure 2

Description

  The present invention relates to a human body characteristic sensor, and more particularly, to a device for measuring a heartbeat rhythm of a human body by contacting both hands or both feet of a measurement object with two contact terminals.

  Heart rate rhythm measurement techniques and devices are already prevalent in the field of medical health, and in recent years have been extensively applied to exercise equipment, recreational equipment, household goods and personal items. A common example of use is to install a sensor on the handlebar of exercise equipment such as a jogging machine or cycle machine for bodybuilding, so that the user can always know the heartbeat rhythm during exercise and grasp the exercise status. It is. In addition, it is a common usage example that a heart rate sensor is added to a well-known weight scale to measure the body weight and simultaneously know the heart rate rhythm.

  In the well-known technology, the basic principle of measuring the heart rate rhythm of the human body is to consider the human body as an electrical resistance value and a fixed bioelectrical resistance, knowing the occurrence of heartbeat by generating one pulsation of the human body voltage signal for each heartbeat, and knowing the rhythm Is to measure. A general well-known heart rate rhythm measuring device applies a voltage to two parts (usually both hands or both feet) that are at a certain distance from the body, and amplifies and compares the above-mentioned two kinds of signals to thereby calculate a pulsation signal. The generation rhythm (that is, the heart rhythm) of the heartbeat was obtained. The known heart rate rhythm measuring device as described above is generally measured by a method in which four contact terminals (four contact terminal type) are arranged and the two contact terminals are contacted with both hands (or both feet). It is intended to contact (or step on) the user who intends to use it. For example, a technique shown in US Pat. No. 5,337,753 is a typical example. Specifically, when the above-mentioned device is applied to a training machine, by placing contact terminals at appropriate distances on the left end of the handlebar and the right end of the handlebar, the left hand and the right hand are held and contacted, and the weight scale is attached. When applied, two contact terminals are arranged on the left and right halves of the pedal so that the left and right feet are stepped on and contacted.

US Pat. No. 5,337,753

  When using the above-described known measuring apparatus, the circuit cannot accurately measure the voltage signal of the human body unless the left hand (or left foot) is in contact with two terminals and the right hand (or right foot) is not in contact with the other two terminals simultaneously. In the sensing method in which the two terminals are simultaneously contacted with such a hand (or a foot), since the back of the hand or the sole of the foot is not flat, one hand (the foot) requires a considerable force to contact the two terminals simultaneously. You have to put it in and step on it. Then, it becomes inconvenient for the sensing work, and there arises a problem that the work progress (movement) is affected. In addition, by designing the contour of the terminal of the sensor part to be a concave arc, it is possible to use it on the back of a non-planar flat, but such a method can be used for measuring objects with different body sizes (adults with large bodies). To small children).

  Also, if one hand (or one leg) to be measured did not touch two terminals at the same time, for example, if you did not grasp your hand very firmly and only one of the contact terminals, As the air is measured and becomes a resistance, a false value is formed, and the heartbeat amplitude obtained by the measurement is interfered with by the pseudo value and is disturbed as shown in FIG. 1, that is, the circuit is misread. Occur.

  Accordingly, an object of the present invention is to provide a heartbeat rhythm measuring device that greatly reduces the problem of poor contact and increases the certainty of measurement.

  In order to achieve the above object, a two-contact terminal type heart rate rhythm measuring device according to the claims of the present invention comprises two contact terminals, an amplification and noise filter circuit, a waveform conversion circuit, and a processing and output circuit. . Two of the contact terminals are electrically conductive and contact both hands or both feet of the object to be measured, and the amplification and noise filter circuit uses the voltage signal obtained between the two contact terminals to determine the pulsation part. Amplifying, filtering and removing noise, the waveform conversion circuit converts the output signal of the amplification and noise filter circuit into a square wave, the processing and output circuit receives the output signal of the waveform conversion circuit, performs arithmetic processing with a specific program, The average rhythm generated by the wave of the output signal is calculated, and the rhythm value is output to the display unit for display.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a diagram showing the amplitude of a heartbeat obtained by measurement with a known structure.
FIG. 2 is a diagram showing the constituent units of the embodiment of the present invention.
FIG. 3 is a diagram illustrating steps of measuring a heart rate rhythm according to an embodiment of the present invention.
FIG. 4 is a diagram showing the amplitude of the heartbeat obtained by measurement in the embodiment of the present invention.
FIG. 5 is a diagram showing a structure in which the embodiment of the present invention is applied to a training machine.
6 is a cross-sectional view taken along line 6-6 of FIG.

As shown in FIG. 2, the two-contact terminal type heart rate rhythm measuring device according to the embodiment of the present invention comprises the following.
The two contact terminals 10 </ b> A and 10 </ b> B have conductivity and come into contact with both hands or both feet of the user (measurement target). That is, when a user contacts correctly, it will present the state where bioelectric resistance is connected between two contact terminals 10A and 10B.

  The amplification and noise filter circuit 20 applies a predetermined voltage between the two contact terminals 10A and 10B (because current flows through the human body), and at the same time, a set of electricity between the two contact terminals 10A and 10B. The resistance signal is measured, the portion of the pulsation (that is, the R wave portion) in which the heartbeat occurs in the signal is amplified, and the noise is filtered out.

  The waveform conversion circuit 30 converts the output waveform processed by the amplification and noise filter circuit 20 into a square wave having a predetermined width.

  The processing and output circuit 40 is a microprocessor, receives the output signal of the waveform conversion circuit 30, performs arithmetic processing with a specific program, calculates an average rhythm (that is, a heartbeat rhythm) at which a wave peak of the output signal is generated, and The value is displayed by outputting it to a display unit (not shown in the figure). Since the aforementioned display device is not a target of the present invention, the aforementioned rhythm can be displayed on a known liquid crystal screen, an LED numeric display device, or a numeric display device such as an LED matrix.

  The simultaneous contact sensor 50 detects whether or not the two contact terminals 10A and 10B are simultaneously in contact with both hands or feet to be measured, and if the detection result indicates that there is contact, the processing and output circuit 40 A rhythm value is output to the above-mentioned display unit, and when the detection result indicates no contact, a warning signal is output without detection. Actually, a sensor such as an infrared sensor, a thin film switch, or a fine movement switch is arranged on the contact terminal 10A and the contact terminal 10B, and it is determined whether or not two sensors are triggered at the same time in a specific circuit. Accordingly, other circuits (amplification and noise filter 20 shown in the figure) are controlled.

  The purpose of arranging the sensor 50 described above is that before or during use, if both hands or feet of the measurement object are not noticed and the contact terminal 10A and the contact terminal 10B are separated, the circuit is interfered by electrical resistance in the air, and misreading is performed. It is to avoid outputting errors or insignificant values at the same time as they occur.

With the above structure, the steps of the two-contact terminal type heart rate rhythm measuring method according to the embodiment of the present invention are as shown in FIG.
(A) Hold the contact terminal 10A and the contact terminal 10B with both hands.
(B) The simultaneous contact sensor 50 detects whether both hands have simultaneously contacted the contact terminal 10A and the contact terminal 10B.
(C) If both hands are not in contact at the same time as a result of detection by the simultaneous contact sensor 50, a warning signal is output without measurement.
(D) When both hands are simultaneously in contact as a result of sensing by the simultaneous contact sensor 50, a predetermined voltage is applied, and at the same time, an electrical resistance signal between the two contact terminals 10A and 10B is measured. In the present embodiment, the simultaneous contact sensor 50 is arranged, and therefore, as shown in FIG. 4, the circuit is prevented from being interfered with by electrical resistance in the air and causing misreading.
(E) The amplification and noise filter circuit 20 amplifies the above signal and simultaneously filters out noise.
(F) The waveform conversion circuit 30 converts the output waveform processed by the amplification and noise filter circuit 20 into a square wave having a predetermined width.
(G) The processing and output circuit 40 receives the output signal of the waveform conversion circuit 30, performs arithmetic processing with a specific program, calculates the heartbeat rhythm part in the output signal, and displays the rhythm value in the display unit (not shown in the figure) Display by output.

  FIG. 5 is a diagram showing a structure in which the above-described embodiment of the present invention is applied to a training machine. In this use example, the first contact terminal 10A having an elliptical plate is disposed on the surface of the left handle bar 72 of the training machine, and the second contact terminal 10B having an elliptical plate is disposed on the surface of the right handle bar 74 of the training machine. The amplification and noise filter circuit 20, the waveform conversion circuit 30, and the processing and output circuit 40 are matched to one circuit board 60. Further, an opening 11A and an opening 11B are formed at the center positions of the elliptical plates of the contact terminal 10A and the contact terminal 10B, and the infrared emitting receiver 52A and the infrared emitting receiver 52B (other sensors) are formed in the openings 11A and 11B, respectively. Is used), and the sensing circuit is arranged in the circuit board 60, and the simultaneous contact sensor 50 described above is jointly configured, so that both hands of the user have surely contacted the contact terminal 10A and the contact terminal 10B. The output end of the processing and output circuit 40 is connected to the display unit 76. Accordingly, when the user exercises, when the two handlebars 72, the contact terminals 10A and 10B of the handlebar 74 are grasped with both hands, the measuring device according to the embodiment of the present invention has its heartbeat rhythm according to the principle described above. And the rhythm obtained by the measurement by the display unit 76 is displayed.

  A detailed description of the above-described simultaneous contact sensor 50 is as follows. As shown in FIG. 6, the infrared emitting receiver 52A and the infrared emitting receiver 52B are arranged in the elliptical contact terminal 10A, the opening 11A in the center of the contact terminal 10B, and the opening 11B. The launch receiver 52B has a launch end and a receive end. In this embodiment, since the emitting end and the receiving end are positioned at the same location, they are displayed at point P. When the measurement object grasps the contact terminal 10A and the contact terminal 10B with both hands, the infrared emitting receiver 52A and the infrared emitting receiver 52B generate a harmless invisible light beam L, and the emission end is the first starting point of the light beam L. The receiver becomes a collection point when diffracting when the light beam L hits an obstacle (radiating the light beam L to the back of the hand to be measured), and by detecting a change in energy between the emitting end and the receiving end by the simultaneous contact sensor 50, Knowing the distance (amount of light energy consumed) between the measurement target and the launch end P, it is determined whether or not the back of the measurement target's hand has simultaneously contacted the contact terminal 10A and the contact terminal 10B. When all the energy detected by the infrared emitting receiver 52A and the infrared emitting receiver 52B is within the set value range, the heart rate rhythm measurement is started. In addition, when detecting a change in energy by the infrared emitting receiver 52A and the infrared emitting receiver 52B, if the detected energy exceeds the set value range, a warning signal is generated without measuring the heart rate rhythm, and the measurement target If the measurement position is adjusted to the correct position, the measurement is started.

The advantages of the two-contact terminal type heart rate rhythm measuring device according to the embodiment of the present invention are as follows.
The structure of the embodiment of the present invention is different from the known four-contact terminal type heart rate measuring device, and when the measurement object is used, it is sufficient to contact the single terminal with the hand or the foot, so that the contact should be made surely. Is possible.

When one hand (or one leg) to be measured does not touch the corresponding terminal at the same time, it reacts immediately and informs that air on a non-contact other terminal in a well-known structure is measured and becomes a resistance. No false value is formed.
In the embodiment of the present invention, by placing the infrared emitting receiver at the center of the outer contour of the contact terminal, it is possible to form the most preferable confirmation position and improve the accuracy of measurement.

The present invention can be applied to a product related to a cycle (weight scale or bodybuilding cycle), a product related to a hand-held tool (a handlebar of a bodybuilding tool or an anthropometric meter), or a device other than those described above. .
Since the foregoing is only a relatively preferred embodiment of the present invention, it is intended that equivalent changes and modifications be made in the claims of the present invention based on the specification and claims of the present invention.

It is a figure which shows the amplitude of the heartbeat obtained by measuring with a known structure. It is a figure which shows the structural unit of the two-contact terminal type heart rate rhythm measuring apparatus by the Example of this invention. It is a figure which shows the step of the heart rate rhythm measurement by the Example of this invention. It is a figure which shows the amplitude of the heartbeat measured by the Example of this invention. It is a figure which shows the structure which applied the Example of this invention to the training machine. FIG. 6 is a cross-sectional view taken along line 6-6 in FIG.

Explanation of symbols

  10A first contact terminal, 10B second contact terminal, 11A opening, 11B opening, 20 amplification and noise filter circuit, 30 waveform conversion circuit, 41 processing and output circuit, 51 simultaneous contact sensor, 61 circuit board, 73 left handlebar, 74 Right handlebar

Claims (8)

Two contact terminals that have conductivity and come into contact with both hands or feet of the measurement object;
Amplification and noise filter circuit that amplifies the pulsation part and filters out noise by the voltage signal obtained by measuring between the two contact terminals,
A waveform conversion circuit for converting the output signal of the amplification and noise filter circuit into a square wave;
A processing and an output circuit for receiving an output signal of the waveform conversion circuit, performing arithmetic processing with a specific program, calculating an average rhythm generated by the ridge of the output signal, and outputting the rhythm value to the display unit, and an output circuit A two-contact terminal type heart rate rhythm measuring device.   By having a simultaneous contact sensor, it detects whether or not two contact terminals have touched both hands or feet of the measurement object at the same time, and when the detection result is in contact, the processing and output circuit outputs the rhythm value. The two-contact terminal type heart rate rhythm measuring device according to claim 1.   The simultaneous contact sensor includes two infrared emitting receivers disposed on the two contact terminals, and a detection circuit that detects whether the two infrared emitting receivers are simultaneously triggered. Item 2. The two-contact terminal type heart rate rhythm measuring device according to item 2.   The two-contact terminal type heart rate rhythm measuring device according to claim 3, wherein the infrared emitting receiver is disposed at the center of the outer contour of the contact terminal.   5. The two-contact terminal type heart rate rhythm measuring apparatus according to claim 4, wherein an opening for arranging an infrared emitting receiver is provided at the center of the outer contour of the contact terminal.   The simultaneous contact sensor includes: two thin film switches disposed on two contact terminals; and a detection circuit that detects whether the two thin film switches are triggered simultaneously. Two-contact terminal type heart rate rhythm measuring device.   The simultaneous contact sensor includes two fine movement switches disposed on two contact terminals, and a detection circuit that detects whether or not the two fine movement switches are simultaneously triggered. Two-contact terminal type heart rate rhythm measuring device.   2. The two-contact terminal type heart rate rhythm measuring device according to claim 1, wherein the processing and output circuit is a microprocessor.

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