TW201907864A - Pulse detection apparatus - Google Patents

Abstract

The present invention provides a pulse detecting apparatus connected to a computer, the pulse detecting apparatus for detecting an immediate pulse signal of a user, an infrared ray transmitting unit for emitting an infrared signal, the infrared signal is transmitted to a blood vessel of a user and reflecting the infrared signal, received by the infrared receiver unit and converted to the original heartbeat signal, amplified by the signal amplification unit, the analog digital conversion unit is converted to the digital signals.

Description

 Pulse detection device  

The invention relates to a pulse detecting device, in particular to a pulse detecting device capable of detecting a pulse instantly and having a sensing function without directly contacting the skin.

In recent years, with the improvement of the quality of life of Chinese people, the diet has become more refined and diversified, but it also tends to be high in fat, high in calories and even high in cholesterol. Coupled with changes in social patterns, factors such as staying up late, entertainment, and life pressure gradually affect the country. Cardiovascular health. Cardiovascular problems, such as heart disease or myocardial infarction, chronic atrial fibrillation and other heart diseases, there are often signs of arrhythmia before the onset, although there are ECG examinations on the market, because the average person can not do ECG examination, can not be found early Abnormal.

The traditional method of measuring pulse is to measure by direct contact with skin, extract the body beat wave by infrared pulse sensor, analyze the characteristic points and characteristic parameters of pulse wave, and establish the characteristic parameters and the real pulse information of the human body. However, since this method requires skin contact, if you need to measure the pulse information at any time, you should pay attention to whether the measuring device is in accurate contact with the skin. If it is not in contact with the skin during the action, the measurement will produce an error. If the pulse can be measured continuously and the pulse regularity and frequency are recorded, the abnormality can be detected early and treated. Pulse wave changes contain abundant physiological information of the human body.

Analyze and compare various electronic products that can be measured on the market, including "MioCARE (MiCorA100)", "Gami", "Apple product", and "Millet products". After analysis, the following results can be obtained: For example, the "MioCARE (MiCorA100)" system is a patient identification system that only avoids the wrong medical procedures, but does not measure (detect) heartbeat and pulse. .

In the "Gami" system, it was observed that there was no device similar to measuring (detecting) heartbeat and pulse.

In the "Apple product" series, the "Apple Watch" uses a green light-emitting diode (LED) hanging from the wrist to detect the measurement (detection) of the heartbeat and pulse. Device.

Also in the "Millet Products" series, the popular "Millet Bracelet" is a device that only hangs on the wrist as a detection part for measuring (detecting) heartbeat and pulse.

In the conventional patented prior art, such as the technical features of the Chinese Patent No. CN201076457 and the CN201084123 patent, it can only be used for pulse measurement of a finger, and only the function of measuring the heart rate cannot be used. Capture the full waveform of the pulse.

In addition, in other conventional patented prior art techniques, such as the technical feature of the "Infrared Pulser" patent of the Republic of China Patent Publication No. 201600063, the patent uses a camera (plug-in) to capture reflected infrared rays and then finds out The average value is checked and the interval in which it falls, with different intervals representing different heart rates, but does not have a reflection intensity time curve for capturing infrared rays.

Another example is the technical feature of the Patent No. M286023 of the Republic of China, which uses an infrared earphone to monitor the heartbeat movement to provide an electronic device for recording (or display). The patent does not use infrared measurement to measure heartbeat, and is used for wireless transmission of information. Infrared only.

In the technical feature of the patent of the Republic of China New Patent Bulletin No. M226900 "Watch with Heartbeat Pulse Detection", the patent is only used to measure the heart rate of the wrist, but does not capture the full waveform of the pulse intensity over time. This patent uses only low pass amplification circuits.

In the technical feature of the patent of the Republic of China New Patent Bulletin No. M197153 "A Physiological Tester", the patent uses infrared rays to measure the pulse per minute, so it can only measure the number of heartbeats, and cannot capture the pulse intensity over time. Full waveform.

Therefore, there is a real need for a non-contact pulse measuring device, and the pulse measuring device can be measured without being affected by external ambient light, and the pulse can be measured instantaneously, thereby continuously measuring in a contactless manner. pulse.

It is an object of the present invention to provide a pulse detecting device that overcomes the problems of the prior art. Providing a pulse detecting device connected to a computer, the pulse detecting device for detecting an instantaneous pulse signal of the user, the pulse detecting device comprising: an infrared emitting unit, an infrared receiving unit, a signal amplifying unit, an analog digital converting unit, and a micro processing unit. The infrared emitting unit is configured to emit an infrared signal, which is emitted to the blood vessel of the user and reflects the infrared reflected signal. The infrared receiving unit is configured to receive the infrared reflected signal, and the infrared receiving unit converts the infrared reflected signal into the original heartbeat signal. The signal amplifying unit is connected to the infrared receiving unit for amplifying the original heartbeat signal. The analog digital conversion unit is connected to the signal amplifying unit, and the analog digital conversion unit receives the original heartbeat signal amplified by the signal amplifying unit, and converts the original heartbeat signal into a digital signal. The micro processing unit is connected to the infrared emitting unit and the analog digital conversion unit. The micro processing unit is configured to receive the original heartbeat signal converted into a digital signal, and calculate a heart rate information according to the original heartbeat signal, and the computer receives the heart rhythm information to The pulse information is measured. Wherein, when the infrared signal is emitted to the blood vessel of the user, the blood in the blood vessel absorbs the infrared signal, and reflects part of the infrared reflection signal. When the amount of blood in the blood vessel due to the pulse changes, the infrared signal is absorbed by the blood volume. The change is changed to further change the size of the infrared reflected signal, and the infrared receiving unit converts the infrared reflected signal into the original heartbeat signal.

The light source of the infrared emitting unit of the present invention is infrared laser light. The microprocessing unit calculates a heart rhythm information, and further includes: the micro processing unit samples the original heartbeat signal converted into the digital signal, and eliminates the low frequency and high frequency signals in the original heartbeat signal by band pass filtering, and performs Fourier on the original heartbeat signal. Convert, select a bandwidth in the original heartbeat signal to calculate the heart rate information.

When the amount of blood in the blood vessel increases, the infrared absorption signal of the blood increases, the infrared reflection signal reflected by the present invention decreases, and when the blood volume in the blood vessel decreases, the infrared absorption signal of the blood decreases, and the reflected infrared signal is enhanced, and the infrared light is enhanced. The receiving unit converts the received infrared reflected signal into the original heartbeat signal.

The computer of the present invention comprises a display unit, and the computer displays the original heartbeat signal and the heartbeat frequency on the display unit.

The infrared emitting unit of the present invention transmits an infrared signal to the blood vessel of the user in a non-contact manner, and the infrared receiving unit and the user receive the infrared reflected signal in a non-contact manner.

The pulse detecting device of the present invention further comprises a communication unit, and the communication unit is connected to the micro processing unit, and the micro processing unit transmits the heart rate information to the computer through the communication unit.

The communication unit of the present invention communicates with the computer wirelessly, or the communication unit communicates with the computer in a wired manner.

In another embodiment, the present invention provides a pulse detecting device connected to a computer for detecting instantaneous pulse information of a user, the device comprising: an infrared emitting unit for transmitting an infrared signal, and an infrared signal transmitting To the user's blood vessel, and reflecting the infrared reflection signal; the infrared receiving unit is configured to receive the infrared reflected signal, the infrared receiving unit converts the infrared reflected signal into the original heartbeat signal; and the signal amplifying unit is connected to the infrared receiving unit for amplifying the The original heartbeat signal; the analog digital conversion unit, the connection signal amplifying unit, the analog digital conversion unit receives the original heartbeat signal amplified by the signal amplifying unit, and converts the original heartbeat signal into a digital signal; and the micro processing unit is connected to the infrared emitting unit And an analog digital conversion unit, the micro processing unit is configured to receive the original heartbeat signal, and calculate the heart rhythm information according to the original heartbeat signal, and the computer receives the heart rhythm information to measure the pulse information; wherein, when the infrared signal is transmitted to the blood vessel of the user, Blood vessel The blood in the blood absorbs the infrared signal and reflects part of the infrared reflection signal. When the amount of blood in the blood vessel due to the pulse changes, the infrared signal changes due to the change in the amount of blood, thereby changing the size of the infrared reflection signal, and the infrared receiving unit Convert the infrared reflected signal to the original heartbeat signal.

The micro processing unit of the present invention calculates a heart rate information, and further includes: the micro processing unit samples the original heartbeat signal, and can perform bandpass filtering to eliminate low frequency and high frequency signals in the original heartbeat signal, and perform Fourier transform on the original heartbeat signal. The micro processing unit converts the original heartbeat signal into a digital signal, and selects a bandwidth in the original heartbeat signal to calculate the heart rate information.

The present invention shows a transformed waveform of a heartbeat over time, so that the number of heartbeats is only one of the outputs, and the circuit of the present invention is a circuit that utilizes frequency-pass amplification.

One of the advantages of the present invention is that it can capture the actual reflected infrared intensity, and through special signal processing, the intensity of the reflected infrared light can be instantly seen, thereby instantly detecting physiological changes such as variations in heart rate.

Another advantage of the present invention is that the device of the present invention can detect blood vessels in various parts of the body, and the amplitude of the expansion and contraction caused by the heartbeat can be non-invasive for real-time detection of diseases such as hardening or obstruction of blood vessels. As well as positioning, it is also possible to combine the medical knowledge of Chinese medicine practitioners to diagnose the internal pain of the body.

The pulse detecting device of the present invention measures the user's instantaneous pulse information in a non-contact manner, and the pulse detecting device can measure any part of the user's body, such as hands, feet, body, and the like.

The pulse detecting device of the invention can measure the instant pulse information in any environment indoors and outdoors, without being affected by the ambient light, and can know that the invention can be actually used by various parts of the body even through the clothes. Share the heartbeat.

The scope of application of the present invention can be used to replace or replace the traditional Chinese medicine field with manual medical treatment, and greatly improve the accuracy of pulse measurement.

100‧‧‧ pulse detection device

102‧‧‧Infrared emitting unit

104‧‧‧Infrared receiving unit

106‧‧‧Signal amplification unit

108‧‧‧ analog digital conversion unit

110‧‧‧Microprocessing unit

112‧‧‧Communication unit

200‧‧‧ computer

202‧‧‧Display unit

208‧‧‧Users

210‧‧‧ Arm

2082‧‧‧Vascular

2084‧‧‧ skin

IR‧‧‧Infrared signal

IR'‧‧‧Infrared reflection signal

S1‧‧‧ original heartbeat signal

S2‧‧‧Enlarge the original heartbeat signal

S3‧‧‧ digital original heartbeat signal

1A is a block diagram of a pulse detecting device of the present invention; FIG. 1B is a pulse detecting device for measuring pulse information of a user according to the present invention; and FIG. 1C is a pulse detecting device for measuring according to FIG. 1B. A partial enlargement of the user's pulse information.

Figure 2A is a diagram of the original heartbeat signal measured by the pulse detecting device of the present invention.

Figure 2B is a diagram of the heartbeat signal after processing by the pulse detecting device of the present invention.

Specific embodiments to which the present invention is applied will be described in detail below with reference to the drawings. Please refer to FIG. 1A and FIG. 1B. FIG. 1A is a block diagram of a pulse detecting device of the present invention. FIG. 1B is a pulse detecting device 100 of the present invention. The pulse information detecting device 100 of the user 208 of the present invention is connected to the computer 200, and the pulse detecting device 100 is configured to detect one of the user's instant pulse information. The pulse detecting device 100 includes an infrared emitting unit 102, an infrared receiving unit 104, a signal amplifying unit 106, an analog digital converting unit 108, a micro processing unit 110, and a communication unit 112. The signal amplifying unit 106 is connected to the infrared receiving unit 104. Moreover, the analog digital conversion unit 108 is connected to the signal amplifying unit 106. Further, the micro processing unit 110 is connected to the infrared emitting unit 102, the analog digital converting unit 108, and the communication unit 112. It should be noted that the light source of the infrared emitting unit 102 is infrared laser light.

Please refer to FIG. 1B and FIG. 1C. FIG. 1C is a partial enlarged view of the pulse information of the user 208 measured by the pulse detecting device of FIG. 1B. The 1Cth picture is an enlarged view of the portion A (the starting point of the dashed circle) in Fig. 1B. The infrared emitting unit 102 is configured to emit an infrared signal IR. In addition, the infrared receiving unit 104 is configured to receive the infrared reflected signal IR'. The infrared emitting unit 102 emits an infrared signal IR to the user 208 arm 210, which in turn illuminates the skin 2084 on the arm 210 and penetrates into the blood vessel 2082. The infrared emitting unit 102 and the user 208 transmit the infrared signal IR to the blood vessel 2082 of the user 200 in a non-contact manner, and the infrared receiving unit 104 and the user 208 receive the infrared reflected signal IR' in a non-contact manner. It should be noted that the present embodiment is not limited to non-contact, and the infrared emitting unit 102 and the infrared receiving unit 104 can also transmit the infrared signal IR and receive the infrared reflected signal IR' in a contact manner.

Referring to FIG. 1C, when the infrared signal IR is irradiated to the skin 2084, part of the infrared signal IR is absorbed by the skin 2084 and the blood vessel 2082, and the rest of the reflection is the infrared reflection signal IR', which is received by the infrared receiving unit 104. receive. When the infrared signal IR is emitted to the blood vessel 2082 of the user 208, the blood in the blood vessel 2082 absorbs the infrared signal IR and reflects a part of the infrared reflection signal IR'. When the blood volume of the blood vessel 2082 due to the pulse changes, the infrared signal Due to the change in blood volume, the infrared signal IR is also absorbed by the blood, which in turn changes the size of the infrared reflection signal IR'. When the amount of blood in the blood vessel 2082 is increased, the blood absorption infrared signal is increased, and the reflected infrared reflection signal IR' is decreased. When the blood volume in the blood vessel 2082 is decreased, the blood absorption infrared signal is decreased, and the reflected infrared signal IR' is enhanced. The infrared receiving unit 104 converts the received infrared reflected signal IR' into the original heartbeat signal S1.

Referring again to Fig. 1A, the infrared receiving unit 104 converts the infrared reflected signal IR' into the original heartbeat signal S1. The original heartbeat signal S1 is as shown in Fig. 2A. The second picture is the original heartbeat signal S1 measured by the pulse detecting device of the present invention. The signal amplifying unit 106 is configured to amplify the original heartbeat signal S1 to amplify the original heartbeat signal S2. The analog digital conversion unit 108 receives the amplified original heartbeat signal S2 of the signal amplifying unit 106, and converts the original heartbeat signal S1 into a digital signal, that is, the digital original heartbeat signal S3. The micro processing unit 110 is configured to receive the digital original heartbeat signal S3 converted into a digital signal, and calculate a heart rate information according to the digital original heartbeat signal S3. It should be noted that the heart rhythm information mentioned here is an intensity-time map. After receiving the heart rhythm information, the computer 200 can generate the user's pulse information by using the heart rhythm information. The pulse information can be used to read the strength of the pulse and the number of heartbeats. The computer 200 includes a display unit 202. The computer 200 displays the digital original heartbeat signal S3 and the heartbeat frequency on the display unit 202.

As shown in FIG. 1A, in the embodiment of the present invention, the pulse detecting device 100 further includes a communication unit 112. The communication unit 112 is connected to the micro processing unit 110. The micro processing unit 100 transmits the heart rate information to the computer through the communication unit 112. 200. The communication unit 112 communicates with the computer 200 in a wireless manner to transmit heart rate information to the computer 200. Alternatively, the communication unit 112 can communicate with the computer 200 in a wired manner to transmit heart rate information to the computer 200.

Referring to FIG. 1A again, the present invention calculates a heart rhythm information by the micro processing unit 110, and further includes: the micro processing unit 110 samples the digital original heartbeat signal S3 converted into a digital signal, and is eliminated by band pass filtering. The low frequency and high frequency signals of the digital original heartbeat signal S3, followed by Fourier transform of the digital original heartbeat signal S3, selecting a bandwidth in the digital original heartbeat signal S3, calculating the heart rate information, and drawing a heartbeat signal diagram, such as Figure 2B shows.

In another embodiment, referring to FIG. 1A, the infrared receiving unit 104 converts the infrared reflected signal IR' into the original heartbeat signal S1. The signal amplifying unit 106 is configured to amplify the original heartbeat signal S1 to amplify the original heartbeat signal S2. The analog digital conversion unit 108 receives the amplified original heartbeat signal S2 of the signal amplifying unit 106, and converts the original heartbeat signal S1 into a digital signal, that is, the digital original heartbeat signal S3. The micro processing unit 110 is configured to receive the amplified original heartbeat signal S2, and calculate a heart rate information according to the amplified original heartbeat signal S2. It should be noted that the heart rhythm information mentioned here is an intensity-time map. After receiving the heart rhythm information, the computer 200 can generate the user's pulse information by using the heart rhythm information. The pulse information can be used to read the strength of the pulse and the number of heartbeats. The computer 200 includes a display unit 202. The computer 200 displays the amplified original heartbeat signal S2 and the heartbeat frequency on the display unit 202.

Still referring to FIG. 1A, the micro processing unit 110 calculates a heart rhythm information step, and further includes: the micro processing unit 110 samples the amplified original heartbeat signal S2, and eliminates the low frequency and the high frequency of the amplified original heartbeat signal S2 by band pass filtering. The frequency signal is then subjected to Fourier transform on the amplified original heartbeat signal S2, the micro processing unit 110 converts the original heartbeat signal S2 into a digital original heartbeat signal S3, and selects a bandwidth in the digital original heartbeat signal S3 to calculate the heart rate. News.

As shown in FIG. 2A, which is the original heartbeat signal measured by the pulse detecting device of the present invention, it can be seen that the original heartbeat can be measured by various parts of the body even if the present invention passes through the clothes, that is, The present invention measures evidence of the original heartbeat.

FIG. 2B is a diagram showing the heartbeat signal displayed after the original heartbeat is processed by the pulse detecting device of the present invention.

According to the foregoing description, the pulse detecting device of the present invention is configured to detect an immediate pulse signal of a user, and the pulse detecting device comprises: an infrared emitting unit, an infrared receiving unit, a signal amplifying unit, an analog digital converting unit, and a micro processing unit. . The infrared emitting unit is configured to emit an infrared signal, which is emitted to the blood vessel of the user and reflects the infrared reflected signal. The infrared receiving unit is configured to receive the infrared reflected signal, and the infrared receiving unit converts the infrared reflected signal into the original heartbeat signal. The signal amplifying unit is connected to the infrared receiving unit for amplifying the original heartbeat signal. The analog digital conversion unit is connected to the signal amplifying unit, and the analog digital conversion unit receives the original heartbeat signal amplified by the signal amplifying unit, and converts the original heartbeat signal into a digital signal. The micro processing unit is connected to the infrared emitting unit and the analog digital conversion unit. The micro processing unit is configured to receive the original heartbeat signal converted into a digital signal, and calculate heart rhythm information according to the original heartbeat signal, and the computer receives the heart rhythm information to The pulse information is measured.

The present invention shows a transformed waveform of a heartbeat over time, so that the number of heartbeats is only one of the outputs, and the circuit of the present invention is a circuit that utilizes frequency-pass amplification.

One of the advantages of the present invention is that it can capture the actual reflected infrared intensity, and through special signal processing, the intensity of the reflected infrared light can be instantly seen, thereby instantly detecting physiological changes such as variations in heart rate. Moreover, the advantage of the present invention is that the device of the present invention can also detect blood vessels in various parts of the body, and the waveform of the amplitude of expansion and contraction caused by the heartbeat can be non-invasive for diseases such as hardening of the blood vessels or obstruction. Detection and positioning can also be combined with the medical knowledge of Chinese medicine to diagnose the internal pain of the body.

The pulse detecting device of the present invention measures the instantaneous pulse information of the user by using a non-contact method, that is, the infrared emitting unit of the present invention and the user transmit the infrared signal to the blood vessel of the user in a non-contact manner, and the infrared light. The receiving unit and the user receive the infrared reflection signal in a non-contact manner. The pulse detecting device can measure any part of the user's body, such as hands, feet, body, and the like. The pulse detection device can measure the instantaneous pulse information in any environment indoors and outdoors, and is not affected by the ambient light. Therefore, it can be known that the present invention can be used by various parts of the body even through the clothes. The original heartbeat was measured. However, the scope of application of the present invention can be used to replace or replace the traditional Chinese medical field with manual medical treatment, and greatly improve the accuracy of pulse measurement.

The above are only the preferred embodiments of the present invention, and are not intended to limit the scope of the claims of the present invention. Therefore, other equivalent changes or modifications which are not departing from the spirit of the present invention should be included in the present invention. Within the scope of the invention.

Claims (12)

 A pulse detecting device is connected to a computer for detecting an instant pulse information of a user, the device comprising: an infrared emitting unit for transmitting an infrared signal, the infrared signal is transmitted to a blood vessel of the user, and Reflecting an infrared reflected signal; an infrared receiving unit for receiving the infrared reflected signal, the infrared receiving unit converting the infrared reflected signal into an original heartbeat signal; and a signal amplifying unit connected to the infrared receiving unit for amplifying the An original heartbeat signal; an analog-to-digital conversion unit connected to the signal amplifying unit, the analog-to-digital conversion unit receiving the original heartbeat signal amplified by the signal amplifying unit, and converting the original heartbeat signal into a digital signal; and a micro processing unit, Connecting the infrared emitting unit and the analog digital conversion unit, the micro processing unit is configured to receive the original heartbeat signal converted into a digital signal, and calculate a heart rate information according to the original heartbeat signal, the computer receiving the heart rhythm information, Measure the pulse information; among them, When the infrared signal is emitted to the blood vessel of the user, the blood in the blood vessel absorbs the infrared signal, and reflects part of the infrared reflection signal. When the blood volume in the blood vessel due to the pulse changes, the infrared signal changes due to the blood volume absorption. And changing, and then changing the size of the infrared reflection signal, the infrared receiving unit converts the infrared reflection signal into the original heartbeat signal.    The pulse detecting device of claim 1, wherein the light source of the infrared emitting unit is an infrared light.    The pulse detecting device of claim 2, wherein the light source of the infrared emitting unit is an infrared laser light.    The pulse detecting device of claim 1, wherein the micro processing unit calculates a heart rhythm information, further comprising: the micro processing unit sampling the original heartbeat signal converted into a digital signal, and bandpassing The filtering removes low frequency and high frequency signals in the original heartbeat signal, performs Fourier transform on the original heartbeat signal, and selects a bandwidth in the original heartbeat signal to calculate the heartbeat information.    The pulse detecting device according to claim 1, wherein when the amount of blood in the blood vessel increases, the blood absorbs the infrared signal, and the reflected signal of the reflected infrared light decreases, when the blood volume in the blood vessel decreases. When the infrared signal absorbed by the blood is reduced, the reflected infrared signal is enhanced, and the infrared receiving unit converts the received infrared reflected signal into the original heartbeat signal.    The pulse detecting device of claim 1, wherein the computer comprises a display unit, and the computer displays the original heartbeat signal and the heartbeat frequency on the display unit.    The pulse detecting device of claim 1, wherein the infrared emitting unit and the user transmit the infrared signal to the blood vessel of the user in a non-contact manner, and the infrared receiving unit is in non-contact with the user. In the manner, the infrared reflection signal is received.    The pulse detecting device of claim 1, wherein the pulse detecting device further comprises a communication unit, the communication unit is connected to the micro processing unit, and the micro processing unit transmits the heart rate information to the communication unit The computer.    The pulse detecting device of claim 8, wherein the communication unit wirelessly communicates with the computer.    The pulse detecting device of claim 8, wherein the communication unit communicates with the computer in a wired manner.    A pulse detecting device is connected to a computer for detecting an instant pulse information of a user, the device comprising: an infrared emitting unit for transmitting an infrared signal, the infrared signal is transmitted to a blood vessel of a user, and Reflecting an infrared reflected signal; an infrared receiving unit for receiving the infrared reflected signal, the infrared receiving unit converting the infrared reflected signal into an original heartbeat signal; and a signal amplifying unit connected to the infrared receiving unit for amplifying the An original heartbeat signal; an analog-to-digital conversion unit connected to the signal amplifying unit, the analog-to-digital conversion unit receiving the original heartbeat signal amplified by the signal amplifying unit, and converting the original heartbeat signal into a digital signal; and a micro processing unit, Connecting the infrared emitting unit and the analog digital conversion unit, the micro processing unit is configured to receive the original heartbeat signal, and calculate a heart rate information according to the original heartbeat signal, the computer receiving the heart rhythm information to measure the pulse information; Wherein the infrared signal is transmitted When the blood vessel of the user reaches the blood vessel of the user, the blood in the blood vessel absorbs the infrared signal, and reflects part of the infrared reflection signal. When the amount of blood in the blood vessel due to the pulse changes, the infrared signal changes due to the change in blood volume absorption, and further The infrared reflection signal is changed in size, and the infrared receiving unit converts the infrared reflection signal into the original heartbeat signal.    The pulse detecting device of claim 11, wherein the micro processing unit calculates a heart rate information, further comprising: the micro processing unit sampling the original heartbeat signal, and eliminating the original heartbeat signal by band pass filtering. The low frequency and high frequency signals perform Fourier transform on the original heartbeat signal, and the micro processing unit converts the original heartbeat signal into a digital signal, and selects a bandwidth in the original heartbeat signal to calculate the heartbeat information.