TW201722346A - Physio-signal measuring device - Google Patents

Abstract

A Physio-signal measuring device comprises a base, a light assembly a photo-electricity sensor and a micro-processor. The surface of the base has a transmitting area and a receiving area. The light assembly disposes on the transmitting area. The light assembly has a plurality of light sections. The plurality of light sections launches light with different wavelength. The photo-electricity sensor disposes on the receiving area. The photo-electricity sensor receives the reflect lights and generates an electric-signal. The micro-processor electrically connects with the photo-electricity sensor to receiving the electric-signal. The micro-processor transfers the electric-signal to a wave signal. In accordance with the above structure can promote the accuracy of measuring.

Description

Physiological signal measuring device

The invention relates to a physiological signal measuring device, in particular to a physiological signal measuring device for measuring a physiological signal by using an optical sensor.

The physiological signal can be used to reflect the activity of life, and can be used to judge the health of the living organism. Taking the heart rate signal of the human body as an example, the heart rate signal can reflect the heart rhythm of the subject, and can be used by the medical staff to judge the subject. The degree of health. Among them, the heart rate signal can be measured by an electrocardiograph with one of the electrode sheets, and the heart rate signal is measured by optical conduction.

The conventional photoelectric measuring device usually has a light emitter and a photo-sensing device. When the photoelectric measuring device is to measure the heart rate signal, the light emitter can be placed on the skin surface of a subject. And emitting a light to the blood vessel in the subject, and the blood vessel correspondingly generates a reflected light due to the irradiation of the light; then, the photodetector can receive the reflected light and generate according to the reflected light. A signal. Since the reflected light can reflect a change in blood flow in the blood vessel, and the change in the blood flow is related to the rhythm of the heart, the electrical signal can be expressed when the photodetector generates the electrical signal according to the reflected light. Changes in blood flow in blood vessels, and can be used as a heart rate signal to express heart rhythm.

However, the light emitter of the conventional optical measuring device can only emit light of a single color, that is, the light emitter can only emit light of a specific wavelength, and the light emitter is directed to the measured light at a specific wavelength. When the body is irradiated, the intensity of the reflected light may be affected by the human tissue. When the intensity of the reflected light is weak, the photodetector will not be correctly sensed. The reflected light, and can not output the electrical signal corresponding to the change of blood flow, has the problem of poor measurement accuracy.

In view of this, the utility model provides a physiological signal measuring device to solve the problem that the measuring accuracy of the conventional measuring device is not good.

The object of the present invention is to provide a physiological signal measuring device that can measure light of physiological signals through different wavelengths of light, and has the effect of improving measurement accuracy.

In order to achieve the above object, the physiological signal measuring device of the present invention comprises: a substrate, the surface of the substrate is divided into an emitting area and a receiving area; and a light emitting component, the light emitting component is disposed in the emitting area, the light emitting component Having a plurality of light-emitting segments, each of the plurality of light-emitting segments having at least one micro-light-emitting diode, wherein the plurality of light-emitting segments respectively emit a plurality of light rays toward a detecting position, and the light emitted by each of the plurality of light-emitting segments Having different wavelengths; a photo-electrical sensor is disposed in the receiving area, the photo-sensing device is capable of receiving a plurality of reflected rays reflected by the detecting position, and generating a telecommunication according to the plurality of reflected lights And a microprocessor electrically connected to the optical sensor to receive the electrical signal and convert the electrical signal into a waveform signal. This has the effect of improving the accuracy of the measurement.

The plurality of light exiting segments are arranged at equal intervals in the first array direction in the emitter region, and the first array direction is parallel to the surface of the substrate. This has the effect of improving the accuracy of the measurement.

The plurality of light exiting segments have the same size. In the first arraying direction, each of the plurality of light exiting segments has a size length, and the adjacent two of the plurality of light exiting segments have a spacing length. The length of the interval is not less than the length of the dimension. This has the effect of improving the accuracy of the measurement.

Among them, the size is 20 μm in length. This has the effect of improving measurement accuracy. fruit.

The number of the plurality of light exiting segments is three, and is respectively a red light exiting section, a green light emitting section, and a blue light emitting section. This has the effect of improving the accuracy of the measurement.

The micro-light emitting diode of the plurality of light-emitting segments includes a plurality of red light-emitting diodes, a plurality of green light-emitting diodes, and a plurality of blue light-emitting diodes, and the red light-emitting portion has a second The plurality of red light emitting diodes arranged at equal intervals in the alignment direction, the green light emitting sections having the plurality of green light emitting diodes arranged at equal intervals in the second array direction, the blue light emitting section And a plurality of blue light emitting diodes arranged at equal intervals in the second array direction, wherein the second array direction is parallel to a surface of the substrate, and the second array direction is perpendicular to the first array direction. This has the effect of improving the accuracy of the measurement.

The controller further has a controller electrically connected to the light emitting component, and the controller is capable of controlling at least two of the plurality of light exiting segments to emit the light. This has the effect of saving energy and maintaining sensing accuracy.

The waveform signal is a heart rate waveform. Thereby improving the convenience of judging the heart rate condition.

There is another electronic device, the electronic device is electrically connected to the microprocessor to receive the waveform signal, and the electronic device has a display capable of displaying the waveform signal. Thereby, the convenience of the user to receive and view the physiological signal is improved.

The microprocessor has a wireless transmission module, and the electronic device has a wireless receiving module. The microprocessor is electrically connected to the wireless receiving module of the electronic device by using the wireless transmission module. This has the effect of improving ease of use.

Wherein, the electronic device is a mobile phone. This has the effect of improving ease of use.

A physiological signal measuring device comprises: a substrate, the surface of the substrate is divided into an emitting area and a receiving area; and a light emitting component, the light emitting component is disposed in the emitting area, The light-emitting component has a plurality of light-emitting segments, each of the plurality of light-emitting segments having at least one micro-light-emitting diode, wherein the plurality of light-emitting segments respectively emit a plurality of light rays toward a detecting position, and each of the plurality of light-emitting segments is emitted The light has different wavelengths; a photo-electrical sensor is disposed in the receiving area, and the photo-sensing device is capable of receiving a plurality of reflected rays reflected by the detecting position, and generating the reflected light according to the plurality of reflected light And an integrated circuit electrically connected to the light emitting component, wherein the integrated circuit can control at least two of the plurality of light exiting segments to emit the light, and the integrated circuit is electrically connected to the photoelectric The sensor receives the electrical signal and converts the electrical signal into a waveform signal. This has the effect of improving the accuracy of the measurement.

The plurality of light exiting segments are arranged at equal intervals in the first array direction in the emitter region, and the first array direction is parallel to the surface of the substrate. This has the effect of improving the accuracy of the measurement.

The plurality of light exiting segments have the same size. In the first arraying direction, each of the plurality of light exiting segments has a size length, and the adjacent two of the plurality of light exiting segments have a spacing length. The length of the interval is not less than the length of the dimension. This has the effect of improving the accuracy of the measurement.

Among them, the size is 20 μm in length. This has the effect of improving the accuracy of the measurement.

The number of the plurality of light exiting segments is three, and is respectively a red light exiting section, a green light emitting section, and a blue light emitting section. This has the effect of improving the accuracy of the measurement.

The micro-light emitting diode of the plurality of light-emitting segments includes a plurality of red light-emitting diodes, a plurality of green light-emitting diodes, and a plurality of blue light-emitting diodes, and the red light-emitting portion has a second The plurality of red light emitting diodes arranged at equal intervals in the alignment direction, the green light emitting sections having the plurality of green light emitting diodes arranged at equal intervals in the second array direction, the blue light emitting section Having the plurality of blue light emitting diodes arranged at equal intervals in the second array direction, the second array direction is parallel to a surface of the substrate, and the second array direction is perpendicular to the first Arrange the direction. This has the effect of improving the accuracy of the measurement.

The waveform signal is a heart rate waveform. Thereby improving the convenience of judging the heart rate condition.

〔this invention〕

1‧‧‧Substrate

11‧‧‧ Launch area

12‧‧‧ receiving area

2‧‧‧Lighting components

21‧‧‧Lighting section

211‧‧‧Red light exit section

211a‧‧‧Red light emitting diode

212‧‧‧Green light exit section

212a‧‧‧Green light emitting diode

213‧‧‧Blue light section

213a‧‧‧Blue Light Emitting Diode

3‧‧‧Light Inductance Detector

31‧‧‧Sensor

311‧‧‧Sensor unit

4‧‧‧Microprocessor

41‧‧‧Wireless Transmission Module

5‧‧‧ Controller

6‧‧‧Electronic equipment

61‧‧‧ display

62‧‧‧Wireless receiving module

B‧‧‧Vascular

D1‧‧‧ first alignment

D2‧‧‧Second alignment

L1‧‧‧ size length

L2‧‧‧ interval length

Figure 1: Schematic diagram of the physiological signal measuring device of the present invention.

Figure 2 is a schematic view of the physiological signal measuring device of the present invention.

Figure 3: Schematic diagram of the physiological signal measuring device of the present invention.

Fig. 4 is a schematic view showing the connection of a part of the components of the physiological signal measuring device of the present invention.

Fig. 5 is a schematic view showing the implementation of the physiological signal measuring device of the present invention.

The above and other objects, features and advantages of the present invention will become more <RTIgt;

Please refer to FIG. 1 , which is a schematic diagram of a physiological signal measuring device of the present invention, comprising a substrate 1 , a light emitting component 2 , an optical sensor 3 and a microprocessor 4 , and the light emitting component 2 The photodetector 3 is disposed on the substrate 1 , and the microprocessor 4 is electrically connected to the photodetector 3 .

The surface of the substrate 1 is divided into an emitter region 11 and a receiving region 12, and the emitter region 11 can be used to provide the light emitting component 2, and the receiving region 12 can be used to set the photodetector 3. The surface of the substrate 1 may be a flat surface or a curved surface, and is not limited herein. For example, when the substrate 1 is a hard flat plate member, the surface of the substrate 1 is a plane, and when the substrate is flexible In the case of a sheet, the surface of the substrate 1 may be flat or curved due to the degree of bending.

The light-emitting component 2 is disposed in the emission area 11. The light-emitting component 2 has a plurality of light-emitting sections 21, and the plurality of light-emitting sections 21 respectively emit a plurality of light rays toward a detection position, and each of the plurality of light-emitting sections 21 The emitted light has different wavelengths.

Referring to FIG. 2, the plurality of light exiting segments 21 are arranged at equal intervals in the first array direction D1 in the emitter region 11, and the first array direction D1 is parallel to the surface of the substrate 1, wherein In the case where the plurality of light exiting segments 21 are all of the same size, each of the plurality of light exiting segments 21 has a size length L1 and two adjacent light emitting segments 21 in the first array direction D1. There is a spacing length L2 between the length L2 which is not less than the dimension length L1. Thereby, when the plurality of light-emitting segments 21 are arranged at intervals in the emission region 11, the light emitted by the plurality of light-emitting segments 21 can be reduced to interfere with each other, and the effect of improving the sensing accuracy is improved. In addition, when the length L2 of the interval is not less than the length L1 of the dimension, it is possible to ensure that the light emitted by the plurality of light-emitting segments 21 does not interfere with each other without lifting the installation area. The effect of measuring accuracy.

Referring to the first and second figures, the plurality of light exiting segments 21 preferably emit light of different wavelengths, and the number of the plurality of light exiting segments 21 is not limited thereto. In this embodiment, the number of the plurality of light-emitting segments 21 is three, and is respectively a red light-emitting portion 211, a green light-emitting portion 212, and a blue light-emitting portion 213, and the red light-emitting portion 211 is The red light having a red light wavelength is emitted, and the green light exiting portion 212 emits green light having a green light wavelength, and the blue light exiting portion 213 emits blue light having a blue light wavelength. Moreover, the plurality of light exiting segments 21 can also emit light of mixed colors, for example, the single light exiting section 21 can emit mixed light of red light and green light; or the single light exiting section 21 can emit mixed light of green light and blue light. Or a single light exit section 21 can emit a mixture of red and blue light. Furthermore, the plurality of light exiting sections 21 can also emit infrared light (Infrared Light). Thereby, the light-emitting component 2 can emit light having several different wavelengths, and when the light-emitting component 2 emits light having several different wavelengths toward the detection position in a subject, even if some light is due to its own wavelength The characteristics cannot be smoothly passed through the human tissue, and some of the light can be smoothly irradiated to the detection position according to the characteristics of its own wavelength, thereby generating reflected light for measuring the physiological signal, which has the effect of improving the sensing accuracy.

Moreover, the plurality of light exiting segments 21 each have at least one micro light emitting diode (μLED). The size of the micro-light-emitting diode is 20 μm×20 μm. The arrangement of the micro-light-emitting diode not only enables the light-emitting component 2 to have lower energy consumption, but also reduces the overall volume of the light-emitting component 2 and can also pass through. Finer light is used to accurately illuminate the detected position, which has the effect of improving measurement accuracy.

In this embodiment, when the plurality of light exiting segments 21 are the red light exiting section 211, the green light emitting section 212, and the blue light emitting section 213, the red light exiting section 211 has a second arraying direction D2. a plurality of red light emitting diodes 211a having equal intervals, the green light emitting sections 212 having a plurality of green light emitting diodes 212a arranged at equal intervals in the second array direction D2, the blue light emitting sections 213 Having a plurality of blue light emitting diodes 213a arranged at equal intervals in the second array direction D2, the second array direction D2 is parallel to the surface of the substrate 1, and the second array direction D2 is perpendicular to the first array direction D1. Thereby, the plurality of light-emitting segments 21 may have a plurality of micro-light-emitting diodes arranged in an array pattern, and the plurality of micro-light-emitting diodes emit a plurality of different directions to the detecting position in the subject. When the light of the wavelength is light, it can ensure that some of the light can smoothly pass through the human body according to the characteristics of its own wavelength, thereby generating the reflected light for measuring the physiological signal, which has the effect of improving the sensing accuracy.

In addition, in the above configuration, if the plurality of light-emitting segments 21 have only one of the micro-light-emitting diodes in the first array direction D1, the size length L1 of each of the plurality of light-emitting segments 21 is 20 μm, with the above arrangement, each of the light exiting sections 21 can transmit finer light to accurately illuminate the detected position, and has the effect of improving the measurement accuracy.

The photodetector 3 is disposed in the receiving area 12, and the photodetector 3 is capable of receiving a plurality of reflected rays reflected by the detecting position, and generating an electrical signal according to the plurality of reflected lights, wherein the photoinductor The detector 3 can be any sensor that can receive the optical signal and correspondingly generate the electrical signal, and is not limited thereto.

Referring to FIGS. 1 and 2 again, in more detail, the photodetector 3 and the light-emitting component 2 can be respectively disposed on different sides of the substrate 1; or, as shown in FIG. 3, The photo-sensing device 3 can also have a plurality of sensing segments 31, and each of the sensing segments 31 and each of the light-emitting segments 21 are staggered with each other in the first array direction D1, and, in this embodiment, Each of the plurality of sensing segments 31 has a plurality of sensing units 311 arranged at equal intervals in the second array direction D2, and the plurality of sensing units 311 can receive one or more reflected rays to generate the Telecommunications signal.

The microprocessor 4 is electrically connected to the photodetector 3 to receive the electrical signal and convert the electrical signal into a waveform signal. The microprocessor 4 can be any processor with logic operation and statistical analysis, and the microprocessor 4 can execute a signal processing program, and the signal processing program can convert the electrical signal into any physiologically relevant waveform. Signals, which are well known to those skilled in the art, are not described herein.

Referring to FIG. 1 and FIG. 2 again, the parameter measuring device of the present invention preferably further has a controller 5, the controller 5 is electrically connected to the light emitting component 2, and the controller 5 can control the plurality of light emitting segments. At least two of 21 emit the light. In this embodiment, when the plurality of light-emitting segments 21 are the red light-emitting portion 211, the green light-emitting portion 212, and the blue light-emitting portion 213, the controller 5 can control only the red light-emitting portion 211 and The green light exiting section 212 emits light; or only the green light exiting section 212 and the blue light emitting section 213 are controlled to emit light; or only the red light emitting section 211 and the blue light emitting section 213 are controlled to be lighted by the setting of the controller 5. It can maintain the sensing accuracy of the physiological signal while avoiding excessive power consumption, and has the effect of saving energy and maintaining sensing accuracy.

Moreover, in the case where the microprocessor 4 and the controller 5 are provided in the present invention, the microprocessor 4 and the controller 5 may be integrated circuits formed on a semiconductor substrate, wherein the integrated circuit The light-emitting component 2 and the photo-electrical sensor 3 are electrically connected, and the detailed operation is as described above, and details are not described herein again.

Referring to FIG. 4, the parameter measuring device of the present invention may further have an electronic device 6 electrically connected to the microprocessor 4 to receive the waveform signal. The device 6 has a display 61 capable of displaying the waveform signal, wherein the electronic device 6 can be a portable electronic device, such as a mobile phone or a tablet computer, and when the waveform signal is a heart rate waveform The display 61 can be used to present the heart rate waveform diagram, which can improve the convenience of determining the heart rate condition, and the electronic device 6 can improve the convenience of the user receiving and viewing the physiological signal. Moreover, the manner in which the electronic device 6 is electrically connected to the microprocessor 4 is not limited herein. The electronic device 6 can be electrically connected to the microprocessor 4 through a wired manner, or the microprocessor 4 can have a The wireless transmission module 41, the electronic device 6 can have a wireless receiving module 62, the microprocessor 4 is electrically connected to the wireless receiving module 62 of the electronic device 6 by the wireless transmission module 41, the wireless transmission The module 41 and the wireless receiving module 62 can be a conventional wireless transmission architecture such as Bluetooth, thereby having the effect of improving ease of use.

Referring to FIG. 5, in more detail, when the parameter measuring device of the present invention is to measure the heart rate signal of the subject, the substrate 1 can be disposed on the skin surface of the subject, and The light-emitting component 2 and the photo-sensing device 3 are oriented toward the skin of the subject, and the blood vessel B in the subject is used as the detecting position, so that the plurality of light-emitting segments 21 of the light-emitting component 2 face the The detection positions respectively emit a plurality of rays of different wavelengths. After the plurality of light rays enter the human body, the plurality of light rays must be irradiated to the blood vessel B through the skin tissue, and the plurality of light exiting segments 21 of the light emitting component 2 can emit light of different wavelengths, even if Some of the light cannot be smoothly irradiated to the blood vessel B due to its own wavelength characteristics (for example, light of certain wavelengths cannot pass through specific skin tissue), and light of other wavelengths can be smoothly irradiated to the blood vessel B.

When the plurality of rays illuminate the blood vessel B, the hemoglobin in the blood vessel B absorbs the plurality of light rays and generates the reflected light, and when the subject changes the blood flow in the blood vessel B due to cardiac rhythm When the concentration of hemoglobin changes, the reflected light also has a corresponding change. Therefore, when the photodetector 3 receives the reflected light and correspondingly generates the electrical signal, the electrical signal can indicate the The rhythm of the heart of the subject, after the microprocessor 4 receives the electrical signal, the signal processing program can be used to convert the electrical signal into a heart rate-dependent wave. Shape signal to get the desired physiological signal.

In summary, the physiological signal measuring device of the present invention can simultaneously emit light of different wavelengths to measure physiological signals, so as to prevent part of the light from being smoothly irradiated to the detecting position due to its own wavelength characteristic, and has the lifting measurement. The effect of accuracy.

While the invention has been described in connection with the preferred embodiments described above, it is not intended to limit the scope of the invention. The technical scope of the invention is protected, and therefore the scope of the invention is defined by the scope of the appended claims.

1‧‧‧Substrate

11‧‧‧ Launch area

12‧‧‧ receiving area

2‧‧‧Lighting components

21‧‧‧Lighting section

211‧‧‧Red light exit section

211a‧‧‧Red light emitting diode

212‧‧‧Green light exit section

212a‧‧‧Green light emitting diode

213‧‧‧Blue light section

213a‧‧‧Blue Light Emitting Diode

3‧‧‧Light Inductance Detector

4‧‧‧Microprocessor

5‧‧‧ Controller

Claims (18)

A physiological signal measuring device comprises: a substrate, the surface of the substrate is divided into an emitting area and a receiving area; a light emitting component, the light emitting component is disposed in the emitting area, and the light emitting component has a plurality of light emitting sections, Each of the plurality of light-emitting segments has at least one micro-light-emitting diode, and the plurality of light-emitting segments respectively emit a plurality of light rays toward a detecting position, and each of the plurality of light-emitting segments emits light having different wavelengths; a photodetector is disposed in the receiving area, the photodetector is capable of receiving a plurality of reflected rays reflected by the detecting position, and generating a signal according to the plurality of reflected rays; and a microprocessor The microprocessor is electrically connected to the photo-electrical sensor to receive the electrical signal and convert the electrical signal into a waveform signal. The physiological signal measuring device according to claim 1, wherein the plurality of light exiting segments are arranged at equal intervals in the first array direction in the emitter region, the first array direction being parallel to the surface of the substrate. . The physiological signal measuring device according to claim 2, wherein the plurality of light-emitting segments have the same size, and each of the plurality of light-emitting segments has a size length in the first array direction, the number Between two adjacent ones of the light exiting segments, there is a spacing length which is not less than the length of the dimension. The physiological signal measuring device according to claim 3, wherein the size is 20 μm. The physiological signal measuring device according to claim 3, wherein the number of the plurality of light exiting segments is three, and is respectively a red light exiting section, a green light emitting section and a blue light emitting section. The physiological signal measuring device according to claim 5, wherein the plurality of The light-emitting diode of the light segment comprises a plurality of red light emitting diodes, a plurality of green light emitting diodes and a plurality of blue light emitting diodes, the red light emitting segments having equal in a second array direction Arranging the plurality of red light emitting diodes at intervals, the green light emitting segments having the plurality of green light emitting diodes arranged at equal intervals in the second array direction, the blue light emitting segments having the second The plurality of blue light emitting diodes arranged at equal intervals in the alignment direction, the second array direction is parallel to the surface of the substrate, and the second array direction is perpendicular to the first array direction. The physiological signal measuring device according to claim 1, wherein the controller further has a controller electrically connected to the light emitting component, wherein the controller is capable of controlling at least two of the plurality of light exiting segments to emit the light . The physiological signal measuring device according to claim 1, wherein the waveform signal is a heart rate waveform. The physiological signal measuring device of claim 1, further comprising an electronic device electrically connected to the microprocessor to receive the waveform signal, the electronic device having a display capable of displaying The waveform signal. The physiological signal measuring device according to claim 9, wherein the microprocessor has a wireless transmission module, the electronic device has a wireless receiving module, and the microprocessor is electrically connected to the wireless transmitting module. Connecting the wireless receiving module of the electronic device. The physiological signal measuring device according to claim 9, wherein the electronic device is a mobile phone. A physiological signal measuring device comprises: a substrate, the surface of the substrate is divided into an emitting area and a receiving area; a light emitting component, the light emitting component is disposed in the emitting area, and the light emitting component has a plurality of light emitting sections, a plurality of light-emitting segments each having at least one micro-light emitting diode, the plurality of light-emitting diodes The light segment emits a plurality of light rays respectively toward a detecting position, and each of the plurality of light emitting segments emits light having different wavelengths; and a photo-electrical sensor is disposed in the receiving region, the optical inductor The detector is capable of receiving a plurality of reflected rays reflected by the detecting position, and generating an electrical signal according to the plurality of reflected lights; and an integrated circuit electrically connecting the light emitting component, wherein the integrated circuit can At least two of the plurality of light exiting segments are controlled to emit the light, and the integrated circuit is electrically connected to the photodetector to receive the electrical signal and convert the electrical signal into a waveform signal. The physiological signal measuring device according to claim 12, wherein the plurality of light exiting segments are arranged at equal intervals in the first array direction in the emitter region, the first array direction being parallel to the surface of the substrate . The physiological signal measuring device of claim 13, wherein the plurality of light exiting segments have the same size, and each of the plurality of light exiting segments has a size length in the first arraying direction, the number Between two adjacent ones of the light exiting segments, there is a spacing length which is not less than the length of the dimension. The physiological signal measuring device according to claim 14, wherein the size is 20 μm. The physiological signal measuring device according to claim 14, wherein the number of the plurality of light exiting segments is three, and is respectively a red light exiting section, a green light emitting section and a blue light emitting section. The physiological signal measuring device according to claim 16, wherein the plurality of light-emitting diodes of the plurality of light-emitting segments comprise a plurality of red light-emitting diodes, a plurality of green light-emitting diodes, and a plurality of blue light a light emitting diode having a plurality of red light emitting diodes arranged at equal intervals in a second array direction, the green light emitting section Having the plurality of green light emitting diodes arranged at equal intervals in the second array direction, the blue light exiting light segments having the plurality of blue light emitting diodes arranged at equal intervals in the second array direction, The second alignment direction is parallel to the surface of the substrate, and the second alignment direction is perpendicular to the first alignment direction. The physiological signal measuring device according to claim 12, wherein the waveform signal is a heart rate waveform.