JP2000005139A - Pulse wave detecting device and touch sense detecting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pulse wave detecting device capable of detecting the pulse wave by pulsation and the applied pressing force required for a pulse diagnosis with high reliability. SOLUTION: The sensor section 14 of this pulse wave detecting device 10 is fitted to fingers for use. The sensor section 14 of the pulse wave detecting device 10 is provided with fitting sections 16 fitted to the fingers to press the arteries of a subject from above the skin, at least one sensor support section 18, and first and second sensors. The sensor support section 18 is extended from the fitting section 16, is located nearly along a finger when the fitting section 16 is fitted to the finger, and is provided with a base end section and a free end section. The first sensor is provided on the base end section to detect the strain near the base end section generated when the sensor support section 18 presses the artery near the free end section. The second sensor is provided near the free end section to detect the pulsation transferred to the free end section pressing the artery.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pulse wave detecting device and a tactile detecting device.

[0002]

2. Description of the Related Art In pulse diagnosis in Chinese medicine and in traditional medicine in India, when a examiner appropriately presses the distal part of the forearm from above the radial artery, the pulse is felt by the finger. Consultation has been conducted.

[0003] For example, in Chinese medicine, the pulse shape felt when an appropriate pressing force is applied to the radial artery is roughly classified into three types, which are called a flat pulse, a smooth pulse, and a chord, respectively. Ping liquor is relaxed, has a constant rhythm, has little disturbance, and is an image of a healthy person. Smooth vein, which feels like a smooth pulse, shows abnormalities in blood flow and is associated with edema, hepato-renal disease, respiratory disease, gastrointestinal disease, inflammatory disease, etc. . And
The venous vein is characterized as a straight, long pulse with radial arterial pressure rising rapidly and not falling immediately, but a high pressure for a certain period of time. , Hepatobiliary disease, skin disease, hypertension, painful disease and the like. FIG. 12 (A),
(B) and (C) are typical examples of the blood pressure waveform of the radial artery corresponding to the normal pulse, the smooth pulse, and the chord, respectively.

[0004] In addition, the pulsation classification of the radial artery in Chinese medicine is also performed by the pressing force necessary to feel the optimal pulsation by pressing the radial artery with a finger. The one obtained is called a floating pulse, and the one which cannot obtain the optimum pulsation unless a stronger pressing force is applied than usual is called a sinking pulse. The vein is considered to be a pulse indicating that the disease is present on the surface, that is, the body surface. The vein is a pulse indicating that the illness is behind the body, that is, inside the body. FIG.
FIG. 9 is a graph showing the relationship between a pulsation h felt in pulse diagnosis and an applied pressing force P for each of a floating pulse, a normal pulse, and a pulse pulse.

[0005] Thus, in the pulse diagnosis of Chinese medicine,
The pulsation of the pulsation felt by pressing the radial artery with a finger and the pressing force that needs to be applied to obtain appropriate pulsation are factors for making the diagnosis. Therefore, in order to qualitatively and quantitatively perform such Chinese medicine pulse diagnosis, it is necessary to detect both the pulsation of the radial artery and the pressing force applied to obtain the pulse.

As a specific technique for enabling such detection, a signal obtained from one strain sensor located at the fingertip is separated by a low-pass filter, and a signal due to pulsation of the radial artery and a signal added by the finger are added. There is an attempt to obtain a signal based on the applied pressing force. That is, the fact that the pulsation of the radial artery is a low-frequency vibration component and the pressing force applied by the finger is a static component is used.

However, as a result of many clinical experiments by the present inventors, according to such a device, the value of the pressing force can be obtained with relatively high reliability in the range where the applied pressing force is weaker than a certain level. In the range where the pressing force is more than a certain level, the data obtained as the pressing force is significantly different from the actual pressing force. This is because the strain sensor that presses the radial artery through the epidermis to obtain pulsation deforms along the outer peripheral shape of the radial artery in a range where the pressing force is relatively small, and between the output of the strain sensor and the pressing force. Although a substantially linear relationship is obtained, it is considered that when the pressing force is increased to a certain degree or more, the radial artery is flattened, and the distortion of the distortion sensor is reduced on the contrary.

On the other hand, for example, as an input device for tactile information in the field of computer simulation and the like,
There is a type in which a glove-shaped object provided with a pressure sensor on a part such as a finger is attached to a hand, and a pressing force applied by a finger or the like is detected. However, this device requires a glove-like device that covers almost the entire hand, is bulky, and cannot touch an object with a natural feel.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has as its object to provide a highly reliable pulsation due to pulsation and an applied pressing force required for pulse diagnosis. An object of the present invention is to provide a pulse wave detection device and a tactile detection device that can be detected by gender.

Another object of the present invention is to provide a pulse wave detection device and a tactile detection device which can be formed relatively simply, touch an object with a feeling close to nature, and detect a pressing force applied at that time. Is to do.

[0011]

According to a first aspect of the present invention, there is provided a pulse wave detecting device which is formed so as to extend from the mounting portion and is positioned substantially along the finger when the mounting portion is mounted on the finger. And at least one sensor support having a proximal end and a free end, provided at the proximal end, due to the sensor support pressing the artery near the free end. It is characterized by having a sensor part provided with the 1st sensor which detects the generated distortion near the base end, and the 2nd sensor provided near the free end which detects the pulsation of the artery.

According to the first aspect of the present invention, the first sensor for detecting distortion near the base end of the sensor support detects a static pressing force by a finger pressing the subject's artery from the epidermis. At the same time, the pulsation transmitted from the artery can be detected by the second sensor provided near the free end of the sensor support.

Further, in the pulse wave detecting device according to the present invention, the pressing force applied to the free end of the sensor support is detected by the first sensor for detecting distortion near the base end of the sensor support. A distortion sensor is provided at the free end of the sensor support part, and the distortion of the distortion sensor is caused by a change in the surface shape of an artery or the like pressed as in the case of detecting a pressing force by the distortion. It is possible to detect the pressing force applied to the vicinity of the free end with high reliability without causing any problem.

According to a second aspect of the present invention, in the pulse wave detecting device according to the first aspect, a plurality of the sensor support portions are formed substantially in parallel with each other, and the first and second sensors are provided respectively. It is characterized by having.

According to the second aspect of the present invention, since a plurality of sensor supporting portions are provided in parallel, by providing the first sensor and the second sensor respectively, a plurality of adjacent free ends can be provided. The applied pressing force and vibration can be detected.

According to a third aspect of the present invention, there is provided the pulse wave detecting device according to any one of the first and second aspects, wherein the distortion near the base end of the sensor support and the free end of the sensor support are provided. A conversion table in which a relationship between the pressing force with respect to the vicinity of the portion is stored, and based on the distortion detected by the first sensor and the conversion table, the pressing force with respect to the vicinity of the free end of the sensor supporting portion. It is characterized by detecting pressure.

According to the third aspect of the present invention, there is provided a conversion table which stores a relationship between a distortion near the base end of the sensor support and a pressing force on the vicinity of the free end of the sensor support. Based on the distortion detected by the first sensor, the pressing force on the vicinity of the free end of the sensor support can be detected with high accuracy.

According to a fourth aspect of the present invention, in the pulse wave detecting device according to any one of the first to third aspects, the free end portion has a pair of raised portions before and after a position where the second sensor is provided. It has a part.

According to the fourth aspect of the present invention, the free end of the sensor support has a pair of raised portions formed before and after the position where the second sensor for detecting the pulsation of the artery is provided. Since these ridges are located along the artery and cross over the artery from the epidermis, the second sensor can be easily located on the artery, and the pulsation can be reliably detected. can do.

A pulse wave detecting device according to a fifth aspect of the present invention is a pulse wave detecting device having a sensor unit which is attached to a finger pressing an artery of a subject from above the epidermis. A first sensor and a second sensor, wherein the first sensor includes:
It is characterized in that a static pressing force by a finger pressing the subject's artery from above the epidermis is detected, and the second sensor detects vibration transmitted from the artery.

According to the fifth aspect of the present invention, the first sensor detects a static pressing force by a finger pressing the subject's artery from above the epidermis, and the pulsation transmitted from the artery by the second sensor. Can be detected.

According to a sixth aspect of the present invention, in the pulse wave detecting apparatus according to any one of the first to fifth aspects, when the distortion detected by the first sensor is within a predetermined range, It is characterized in that an output signal is taken out from the two sensors.

According to the present invention, when the distortion detected by the first sensor is within a predetermined range, that is, when the pressing force applied to the free end of the sensor support is within the predetermined range. In some cases, the output signal is extracted from the second sensor. Therefore, an output signal from the second sensor can be extracted under the condition that a pressing force within a predetermined range is applied to the free end of the sensor support.

According to a seventh aspect of the present invention, in the pulse wave detecting device according to any one of the first to sixth aspects, the first low-pass filter for extracting a DC component of the output signal of the first sensor; And a second low-pass filter for extracting a low-frequency component of the output signal of the second sensor.

According to the present invention, since the noise component is removed from the output signal of the first sensor by the first low-pass filter, the static pressing force can be detected with high accuracy. Further, since the noise component is removed from the output signal of the second sensor by the second low-pass filter, the low-frequency vibration component can be detected with high accuracy.

The tactile sense detecting device according to the present invention is provided with a mounting portion mounted on a finger for pressing a body to be pressed, and a extending portion extending from the mounting portion. At least one sensor support portion, which is located substantially along the finger when worn and has a base end and a free end, and is provided at the base end, and the sensor support is pressed near the free end. And a first sensor for detecting distortion near the base end caused by the above-described operation.

According to the eighth aspect of the present invention, there is provided a sensor unit including a mounting portion to be mounted on a finger, a sensor supporting portion extending from the mounting portion, and a first sensor provided on the sensor supporting portion. Since the tactile detection device is configured, even when the tactile detection device is mounted, most parts of the finger and the hand can be kept exposed, and the fingertip touches the object with a natural touch. The pressing force can be detected.

Further, in the tactile detection device of the present invention, the pressing force applied to the free end of the sensor support is detected by the first sensor that detects distortion near the base end of the sensor support. Therefore, unlike the case where a distortion sensor is provided at the free end of the sensor support and the pressing force is detected by the distortion, the distortion sensor is not distorted due to the surface shape of the pressed body, and the reliability is high. , The pressing force applied to the vicinity of the free end can be detected.

According to a ninth aspect of the present invention, in the tactile sense detecting device according to the ninth aspect, the tactile sense detecting device is provided near a free end of the sensor support, and is transmitted to the free end pressed by the pressed body. And a second sensor for detecting vibrations.

According to the ninth aspect of the present invention, in addition to the detection of distortion due to the pressing force applied to the free end detected by the first sensor, the sensor is provided at the free end of the sensor support. The second sensor can detect the vibration transmitted to the free end.

According to a tenth aspect of the present invention, in the tactile sense detecting device according to the eighth or the eighth aspect, the plurality of sensor support portions are formed substantially in parallel with each other, and the first and second sensors are respectively provided. Characterized in that at least one of them is provided.

According to the tenth aspect of the present invention, since a plurality of sensor support portions are provided in parallel, the first sensor or the second sensor is provided for each of the plurality of sensor support portions, so that a plurality of adjacent free end portions are provided. The applied pressing force or vibration can be detected.

According to a twelfth aspect of the present invention, in the tactile sense detecting device according to the ninth or tenth aspect, when the distortion detected by the first sensor is within a predetermined range, the output from the second sensor is output. It is characterized in that the signal is formed so as to be taken out.

According to the eleventh aspect, when the distortion detected by the first sensor is within a predetermined range,
That is, when the pressing force applied to the free end of the sensor support is within a predetermined range, an output signal is extracted from the second sensor. Therefore, an output signal from the second sensor can be extracted under the condition that a pressing force within a predetermined range is applied to the free end of the sensor support.

According to a twelfth aspect of the present invention, in the tactile sense detecting device according to any one of the ninth to eleventh aspects,
A first low-pass filter for extracting a DC component of the output signal of the first sensor; and a second low-pass filter for extracting a low-frequency component of the output signal of the second sensor.

According to the twelfth aspect, since the noise component is removed from the output signal of the first sensor by the first low-pass filter, the static pressing force can be detected with high accuracy. Further, since the noise component is removed from the output signal of the second sensor by the second low-pass filter, the low-frequency vibration component can be detected with high accuracy.

According to a thirteenth aspect of the present invention, there is provided the tactile sense detecting device according to any one of the eighth to twelfth aspects.
A conversion table that stores a relationship between a distortion near a base end of the sensor support and a pressing force on a vicinity of a free end of the sensor support; and a distortion detected by the first sensor. And detecting the pressing force on the vicinity of the free end of the sensor support based on the conversion table.

According to the thirteenth aspect of the present invention, there is provided a conversion table which stores a relationship between a distortion near the base end of the sensor support and a pressing force on the vicinity of the free end of the sensor support. Based on the distortion detected by the first sensor, the pressing force on the vicinity of the free end of the sensor support can be detected with high accuracy.

[0039]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below more specifically with reference to the drawings.

[First Embodiment] FIG. 1 is a perspective view showing a state in which a pulse wave detector 10 of the present embodiment is worn on a hand. FIGS. 2 and 3 show the first and second sensors 2.
It is the side view and top view showing the state where sensor part 14 provided with 4 and 32 was attached to a finger. FIG. 4 shows a state in which the pulsation is detected by using the pulse wave detection device 10 having three sensor units 14 to press three fingers with the sensor units mounted thereon onto the radial artery of the forearm. It is a perspective view. And
FIG. 5 is a block diagram of the pulse wave detection device of the present embodiment. In the block diagram, only one of the three sensor units is shown.

<Pulse Wave Detecting Apparatus> As shown in FIG. 5, the pulse wave detecting apparatus of the present embodiment includes a sensor section 14 having a first sensor 24 and a second sensor 32, a pair of amplifiers 27,
34, first and second low-pass filters 28 and 36, a pair of A / D converters 30 and 38, a control unit 50, a storage unit 40, and a display unit 62. Of these parts, the part other than the sensor part 14 is provided on the main body part 12 formed in a wristwatch shape.

The pair of amplifiers 27 and 34 are
The signals from the first and second sensors 24 and 32 are amplified.

The first low-pass filter 28 transmits substantially only a DC component (for example, 0.1 Hz or less) of the signal from the first sensor 24 amplified by the amplifier 27. The second low-pass filter 36 outputs only the low-frequency component (for example, 20 Hz) of the signal from the second sensor 32 amplified by the amplifier 34.
Below).

The pair of A / D converters 30 and 38 convert output signals from the first and second low-pass filters 28 and 36 into digital signals, respectively.

The storage unit 40 stores a conversion table 44 for converting the output signal of the first sensor 24 into a corresponding physical quantity.
It has.

The control unit 50 includes a determination unit 54 for determining whether a signal from the first sensor 24 is within a range corresponding to a predetermined physical quantity.

<Sensor section> Pulse wave detecting apparatus 1 of the present embodiment
As shown in FIGS. 2 and 3, the zero sensor unit 14 includes a mounting unit 16 to be mounted on a finger, a sensor support unit 18 extending from the mounting unit 16, and a second sensor unit 18 disposed on the sensor support unit 18. The first and second sensors 24 and 32 are included.

The mounting portion 16 is formed in a ring shape, and is mounted on the examinee's finger pressing the artery of the subject to be pulsed from above the epidermis.

The sensor supporting portion 18 extends in a direction perpendicular to the mounting portion 16 and is formed in a cantilever shape. When the mounting portion 16 is mounted on a finger, the sensor supporting portion 18 is located substantially along the belly of the finger. . The sensor support unit 18 includes a base end 19 connected to the mounting unit 16 and a free end 20 reaching near the tip of the belly of the finger when the mounting unit 16 is mounted on the finger. In addition, the sensor support part 18 and the mounting part 16 are, for example, polyimide,
It is formed of plastic or metal such as stainless steel. In addition, the sensor support part 18 and the mounting part 16 may be formed of different materials.

The first sensor 24 is a strain sensor provided at the base end 19 of the sensor support 18 as shown in FIG. The first sensor 24 includes a cantilever-shaped sensor support 1.
8 detects distortion near the base end 19 caused by pressing an object to be pressed, for example, an artery through the epidermis, near the free end 20.

The second sensor 32 is a strain sensor provided near the free end 20 of the sensor support 18. The second sensor 32 detects a vibration transmitted to the free end portion 20 that presses an object to be pressed, for example, an artery through the epidermis. Note that the second sensor 32 may be a pressure sensor.

The strain gauges used as the first and second sensors 24 and 32 include a resistor 25 and a constant voltage source 26.
At the same time, for example, it is configured as a circuit as shown in FIG. 6 and outputs a signal corresponding to distortion. Respective strain gauges 31 as first and second sensors 24 and 32
Are connected in series with the resistor 25 and connected to the constant voltage source 26 as shown in FIG. In such a circuit, signals generated at both ends of the strain gauge 31 are extracted as output signals corresponding to the distortion.

The first and second sensors 24, 32
Has a structure in which two strain gauges 31, 31 are bonded to each other, and as shown in a circuit diagram in FIG. 7, a pair of strain gauges 31, 31 are arranged on two adjacent sides, and a pair of resistances of the same value are provided. The circuit configuration of a strain measurement system using bridge circuits 25 and 25 arranged on other two adjacent sides may be adopted. According to this circuit configuration, the effect of temperature on the output voltage can be compensated.

<Operation of Pulse Wave Detecting Apparatus> First, the operation of the pulse wave detecting apparatus 10 of the present embodiment will be described, focusing on the output signal from the first sensor 24.

In order to detect a pulse wave by attaching the sensor unit 14 of the present embodiment to a finger, as shown in FIG. Hold down from. Then, the sensor supporting portion 18 formed in a cantilever shape is curved as exaggeratedly shown in FIG. For this reason, distortion also occurs at the base end 19 of the sensor support portion 18, and distortion also occurs in the strain gauge as the first sensor 24 provided at the base end 19 in accordance with the amount of the distortion. Since the strain gauge has a property in which the electric resistance changes according to the amount of strain, in the circuit shown in FIG. 6 or 7, the voltage of the output signal obtained corresponds to the change in the electric resistance of the strain gauge 31. Change. Therefore, using this output signal, it is possible to detect the pressing force at which the free end portion 20 of the sensor supporting portion 18 presses the object to be pressed, for example, the artery 70 through the epidermis.

As shown in FIG. 5, the output signal from the first sensor 24 is input to the amplifier 27 and amplified, and the amplified signal is transmitted through the first low-frequency band that transmits only a signal of, for example, 0.1 Hz or less. Almost only the DC component is converted by the filter 28, the signal is input to the A / D converter 30 and output as a digital signal, and the digital signal is input to the digital signal line 58. As described above, since the noise component is removed from the output signal of the first sensor 24 by the first low-pass filter 28, the static pressing force can be detected with high accuracy.

The digital signal corresponding to the output signal of the first sensor 24 is compared with a conversion table 44 stored in the storage unit 40, for example, a RAM or an EEPROM, to obtain pressing force data. The conversion table 44 stores the relationship between the value of the output signal of the first sensor 24, which has been converted into a digital signal by the above-described processing, and the pressing force applied to the vicinity of the free end 20 of the sensor support 18. I have. Therefore, based on the conversion table 44 and the digital signal corresponding to the distortion detected by the first sensor 24, the pressing force on the vicinity of the free end 20 of the sensor support 18 can be detected with high accuracy.

The pressing force data thus obtained is
The determination unit 54 provided in the control unit 50 determines whether the data corresponds to the pressing force within a predetermined range.

Next, the operation of the pulse wave detecting device 10 according to the present embodiment will be described, focusing on the output signal from the second sensor 32.

As described above, in order to attach the sensor unit of the present embodiment to a finger and detect a pulse wave, as shown in FIG. 4, the artery 70 which is a pressed body is pressed at the free end of the sensor support unit.
For example, the radial artery is pressed from above the epidermis with an appropriate pressing force.
Then, the strain gauge as the second sensor 32 (FIG. 3) provided at the free end 20 of the sensor support 18 vibrates with the pulsation of the radial artery and is distorted thereby. Since the strain gauge has a property that the electric resistance changes according to the amount of strain, in the circuit shown in FIG. 6 or FIG.
The voltage of the obtained output signal changes according to the change in the electric resistance of the strain gauge 31. Therefore, the vibration of the pressed body transmitted to the second sensor 32 can be detected using the output signal.

As shown in FIG. 5, the output signal from the second sensor 32 is input to the amplifier 27 and amplified, and the amplified signal passes through the second low-pass filter 36 that transmits only signals of, for example, 20 Hz or less. Thus, almost only a DC component is obtained, and the signal is input to the A / D converter 38 and output as a digital signal. The digital signal is input to the digital signal line 58. As described above, since the signal from which the noise component has been removed from the output signal of the second sensor 32 by the second low-pass filter 36 is converted into a digital signal, a low-frequency vibration component can be detected with high accuracy.

The digital signal corresponding to the output signal from the second sensor 32 is such that the pressing force data obtained by the above-described discriminating section 54 based on the signal from the first sensor 24 is within a predetermined range. May be taken out by the control unit 50 only when is determined. With this configuration, when the distortion detected by the first sensor 24 is within the predetermined range, that is, when the pressing force applied to the free end portion 20 of the sensor support 18 is within the predetermined range, the second An output signal will be extracted from the sensor 32. Therefore, an output signal from the second sensor 32 can be extracted under the condition that a pressing force within a predetermined range is applied to the free end portion 20 of the sensor support portion 18.

The data of the pressing force applied to the free end 20 and the data of the vibration transmitted to the free end 20 thus obtained are appropriately processed by the control unit 50 and then controlled by the control unit 50. Is displayed on the display unit 62.

As described above, the pulse wave detection device 10 of the present embodiment uses the first sensor 24 for detecting the distortion near the base end 19 of the sensor support 18 so that the subject's artery 70 is detected.
And the vibration transmitted from the artery 70 can be detected by the second sensor 32 provided near the free end portion 20 of the sensor support portion 18 while detecting the static pressing force of the finger pressing the skin from above the epidermis. .

The pulse wave detecting device 10 according to the present embodiment
Since the first sensor 24 that detects distortion near the base end 19 of the sensor support 18 detects the pressing force applied to the free end 20 of the sensor support 18, the free end of the sensor support 18 is The distortion of the strain sensor does not change due to the change in the surface shape of the pressed artery or the like as in the case where the pressing force is detected by the distortion of the distortion sensor provided in the section 20, and high reliability is obtained. The pressing force applied to the vicinity of the free end can be detected.

The pulse wave detecting device according to the present embodiment can be used as a tactile detecting device that can be used as an input device in an electronic device such as a computer with the same configuration as described above. In that case, the sensor unit 14 may include only the first sensor 24 that detects the pressing force. In addition, if the sensor units 14 are attached to a plurality of fingers and output signals from the sensor units 14 correspond to each of a plurality of parameters to be input to the electronic device, a plurality of parameters can be input quickly and simultaneously. it can.

[Second Embodiment] The second embodiment is different from the first embodiment in that the sensor section has a plurality of sensor support sections. Other points are the same as in the first embodiment, and a description thereof will be omitted. In the drawings, corresponding parts are denoted by the same reference numerals as in the first embodiment.

FIG. 9 is a plan view showing a state where the sensor unit 80 of the pulse wave detecting device according to the present embodiment is mounted on a finger. As shown in the figure, the sensor section 80 includes a plurality of (in this case, four) sensor supports 18. As in the case of the first embodiment, the sensor support section 18 is attached to the mounting section 1.
6, a first sensor 24 is provided in the vicinity of the base end 19 of each sensor support 18,
A second sensor 32 is provided near the free end 20.
The sensor support portions 18 are formed substantially parallel to each other. The amplifier 2 connected to the first sensor 24
7. First low-pass filter 28 and A / D converter 30
Are provided in a plurality of systems corresponding to the respective amplifiers, the amplifier 34 connected to the second sensor 32, the second low-pass filter 36,
And a plurality of A / D converters 38 are provided for each of them.

As described above, in the pulse wave detecting device of the present embodiment, since the sensor section 14 is provided with a plurality of sensor support sections 18 in parallel, it is applied to the free ends of a plurality of adjacent sensor support sections 18. Pressing force and vibration can be detected. For example, in tradition medicine using pulse diagnosis called Ayurveda in India, it is said that a diagnosis is made by detecting a plurality of pulsations from one finger, but objective data corresponding to such a diagnosis method is obtained. It is also possible to collect.

[Third Embodiment] The third embodiment is different from the first embodiment in that the sensor support has a pair of raised portions at its free end.
Different from the embodiment. Other points are the same as in the first embodiment, and a description thereof will be omitted. Also,
In the drawings, corresponding parts are denoted by the same reference numerals as in the first embodiment.

FIG. 10 is a side view showing a state in which the sensor unit 90 of the pulse wave detecting apparatus according to the present embodiment is mounted on a finger. FIG. It is the perspective view seen. As shown in these figures, the sensor section 90 of the present embodiment includes a pair of raised portions 92, 92 at the free end 20 of the sensor support section 18. One of the pair of raised portions 92, 92 is located on the distal side from the second sensor 32, and the other is located on the proximal side from the second sensor 32, and the second sensor 32 is sandwiched between them by the front and rear. It is in a state.

As described above, the sensor unit 90 of the present embodiment is
Has a pair of raised portions 92 before and after the position where the second sensor 32 for detecting the pulsation of the artery is provided, so that the artery can be easily captured. Therefore, by positioning these raised portions 92, 92 on both sides along the artery, the second sensor 32 can be easily positioned on the artery, and pulsation can be reliably detected.

The raised portion 92 shown in this embodiment is
In the sensor unit 80 having the plurality of sensor supports 18 according to the second embodiment, each sensor support 18 may be provided.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments.
Various modifications can be made within the scope of the present invention or within the equivalent scope of the claims.

For example, in each of the above embodiments, an example of a pulse wave detection device having three sensor units each including a first sensor and a second sensor has been described. The number may be one or two, or four or more.

In each of the above embodiments, an example is shown in which the sensor unit of the pulse wave detecting device is used by being attached to the finger of the examiner, but the sensor unit is fixed to a rod-shaped object or the like. Alternatively, the sensor support may press the artery from above the epidermis.

[0077]

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state in which a pulse wave detection device according to a first embodiment is worn on a hand.

FIG. 2 is a side view showing a state where the sensor unit of the pulse wave detection device according to the first embodiment is mounted on a finger.

FIG. 3 is a plan view showing a state where the sensor unit of the pulse wave detection device according to the first embodiment is mounted on a finger.

FIG. 4 is a perspective view showing a state in which a pulse wave is detected by wearing the pulse wave detection device of the first embodiment.

FIG. 5 is a block diagram of the pulse wave detection device according to the first embodiment.

FIG. 6 is a circuit diagram showing an example of a circuit for extracting an output signal from a first or second sensor.

FIG. 7 is a circuit diagram showing another example of a circuit for extracting an output signal from the first or second sensor.

FIG. 8 is an explanatory diagram showing a state in which the sensor support is pressing an artery via the epidermis.

FIG. 9 is a plan view illustrating a state where the sensor unit according to the second embodiment is mounted on a finger.

FIG. 10 is a side view showing a state where the sensor unit of the third embodiment is mounted on a finger.

FIG. 11 is a perspective view showing a state in which the sensor unit of the third embodiment is mounted on a finger.

FIGS. 12 (A), (B), and (C) are typical examples of radial artery blood pressure waveforms corresponding to the Ping, Smooth, and Chord veins in Chinese medicine.

FIG. 13 is a graph showing the relationship between a pulsation h felt in a pulse diagnosis and an applied pressing force P for Chinese meditation in terms of vein vein, normal, and vein.

[Explanation of symbols]

 Reference Signs List 10 pulse wave detection device 14, 80, 90 sensor unit 16 mounting unit 18 sensor support unit 19 base end 20 free end 24 first sensor 28 first low-pass filter 32 second sensor 36 second low-pass filter 44 conversion table 92 ridge

Claims (13)

[Claims] An attachment portion attached to a finger pressing an artery of a subject from above the epidermis; and an extension formed from the attachment portion, the attachment portion being positioned substantially along the finger when the attachment portion is attached to the finger. At least one sensor support comprising a proximal end and a free end, provided at the proximal end, wherein the sensor support is caused by pressing the artery near the free end A pulse wave detection apparatus comprising: a first sensor that detects distortion near the base end; and a sensor unit that is provided near the free end and that detects pulsation of the artery. . 2. The pulse wave detection device according to claim 1, wherein a plurality of the sensor support portions are formed substantially in parallel, and the first and second sensors are provided respectively. 3. The conversion table according to claim 1, wherein a relationship between a distortion near a base end of the sensor support and a pressing force on a vicinity of a free end of the sensor support is stored. A pulse wave detection device, comprising: detecting a pressing force applied to a vicinity of a free end of the sensor support based on a distortion detected by the first sensor and the conversion table. 4. The pulse wave detecting device according to claim 1, wherein the free end has a pair of raised portions before and after a position where the second sensor is provided. 5. A pulse wave detection device having a sensor unit attached to a finger pressing an artery of a subject from above the epidermis, wherein the sensor unit has first and second sensors, and the first sensor Detects a static pressing force by a finger pressing an artery of a subject from the epidermis, and wherein the second sensor detects a vibration transmitted from the artery. 6. The apparatus according to claim 1, wherein an output signal is taken out from the second sensor when the distortion detected by the first sensor is within a predetermined range. A pulse wave detection device characterized by the above-mentioned. 7. The first low-pass filter according to claim 1, wherein the first low-pass filter extracts a DC component of an output signal of the first sensor, and the second low-pass filter extracts a low-frequency component of an output signal of the second sensor. 2
A pulse wave detection device comprising: a low-pass filter; 8. A mounting portion to be mounted on a finger that presses a body to be pressed, a base portion formed to extend from the mounting portion and positioned substantially along the finger when the mounting portion is mounted on the finger, At least one sensor support portion comprising a portion and a free end portion; and near the base end portion, which is provided at the base end portion and is caused by the sensor support portion being pressed near the free end portion. And a first sensor for detecting distortion in the tactile sense detection device. 9. The tactile sensation according to claim 8, further comprising a second sensor provided near the free end and detecting vibration transmitted to the free end pressed by the pressed body. Detection device. 10. The sensor support according to claim 8, wherein a plurality of the sensor support portions are formed substantially in parallel, and at least one of the first and second sensors is provided in each of the sensor support portions. Tactile detection device. 11. The device according to claim 9, wherein an output signal is taken out from the second sensor when the distortion detected by the first sensor is within a predetermined range. Tactile detection device. 12. The filter according to claim 9, wherein a first low-pass filter for extracting a DC component of an output signal of the first sensor, and a second filter for extracting a low-frequency component of an output signal of the second sensor. 2
A tactile detection device comprising: a low-pass filter; 13. The sensor according to claim 8, wherein a relationship between a distortion near a base end of the sensor support and a pressing force on a vicinity of a free end of the sensor support is stored. A touch table for detecting a pressing force on a free end portion of the sensor support in the vicinity of the sensor based on the distortion detected by the first sensor and the conversion table.