阅读说明：本技术 红外心率测量仪 (Infrared heart rate measuring instrument ) 是由 原永钊 金豫 于 2019-08-27 设计创作，主要内容包括：本发明提出了一种红外心率测量仪,包括传感器部分,传感器中的红外发射管不断发射红外线,红外发射管发射的红外线穿过动脉血管经手指指骨反射回来,反射回来的信号强度随着血液流动的变化而变化,接收管把这个信号转化成微弱的电信号；电路处理部分由红外光电开关、电压跟随器、放大器、低通滤波器、二级放大器电路组成；红外光电开关探测到手指脉搏的震动对红外发射管发射的红外线产生的影响,接收管把光信号转化为电信号在输出端输出；运算放大器把信号放大,滤掉50HZ的电源噪声干扰,并将滤波整形以后的信号再次放大,放大后的信号以供输出。(The invention provides an infrared heart rate measuring instrument which comprises a sensor part, wherein an infrared transmitting tube in the sensor continuously transmits infrared rays, the infrared rays transmitted by the infrared transmitting tube pass through arterial blood vessels and are reflected back by finger bones, the strength of the reflected signals changes along with the change of blood flow, and a receiving tube converts the signals into weak electric signals; the circuit processing part consists of an infrared photoelectric switch, a voltage follower, an amplifier, a low-pass filter and a secondary amplifier circuit; the infrared photoelectric switch detects the influence of the vibration of the finger pulse on the infrared rays emitted by the infrared emission tube, and the receiving tube converts the optical signals into electric signals to be output at the output end; the operational amplifier amplifies the signal, filters out the power supply noise interference of 50HZ, and amplifies the filtered and shaped signal again, and the amplified signal is provided for output.)

1. An infrared heart rate measurement instrument, comprising:

the sensor part consists of a high-emission power infrared photodiode and a high-sensitivity phototransistor; an infrared emission tube in the sensor continuously emits infrared rays, when the emitted infrared rays are not reflected back or the reflection intensity is not large enough, the phototriode is always in an off state, and when the phototriode detects light rays, the current between C, E is increased and conducted; the stronger the reflected light, the greater the current; infrared rays emitted by the infrared emission tube pass through arterial blood vessels and are reflected back by finger bones, the intensity of the reflected signals changes along with the change of blood flow, and the receiving tube converts the signals into weak electric signals;

the circuit processing part consists of an infrared photoelectric switch TCRL5000, a voltage follower, an amplifier, a low-pass filter and a secondary amplifier circuit; the infrared photoelectric switch TCRL5000 can detect the influence of the vibration of finger pulse on the infrared rays emitted by the infrared emission tube, and the receiving tube converts optical signals into electric signals to be output at the output end; the first operational amplifier is used as a voltage follower to send the voltage of the photoelectric switch to the next stage, the second operational amplifier amplifies the signal, the third operational amplifier is a low-pass filter to filter the power supply noise interference of 50HZ, the last operational amplifier plays a role of secondary amplification, the signal after filtering and shaping is amplified again, and the amplified signal is output.

2. The infrared heart rate measurement instrument of claim 1, wherein the sensor is TCRT5000, which is a reflective sensor.

Technical Field

The invention relates to the technical field of electronic instruments, in particular to an infrared heart rate measuring instrument.

Background

The heart rate refers to the number of heartbeats per minute of a normal person in a quiet state, also called a quiet heart rate, and is generally 60-100 times/minute, and individual differences can be generated due to age, gender or other physiological factors. Generally, the smaller the age, the faster the heart rate, the slower the elderly than the young, and the faster the heart rate in women than in men of the same age, are normal physiological phenomena. In a resting state, the normal heart rate of an adult is 60-100 times/min, and the ideal heart rate is 55-70 times/min.

The heart rate measuring instrument is a device for measuring the heart rate of a human being and can test whether the heart rate of a person to be measured is in a normal state.

Disclosure of Invention

The invention designs an infrared heart rate measuring instrument which can measure the heart rate value of human beings.

The invention mainly comprises the following parts:

first, a sensor part

TCRT5000 is a reflective sensor consisting of a high-emission power infrared photodiode and a high-sensitivity phototransistor. The infrared emission tube in the sensor continuously emits infrared rays, when the emitted infrared rays are not reflected back or the reflection intensity is not large enough, the phototriode is always in an off state, and when the phototriode detects light, the current between C, E is increased and conducted. The stronger the reflected light, the greater the current. When the hand is put on, the infrared rays emitted by the infrared emission tube pass through the artery blood vessel and are reflected back by the finger bones, the intensity of the reflected signals changes along with the change of blood flow, and the receiving tube converts the signals into weak electric signals.

Second, the circuit processing part

The circuit mainly comprises an infrared photoelectric switch TCRL5000, a voltage follower, an amplifier, a low-pass filter, a secondary amplifier and other circuits. The infrared photoelectric switch TCRL5000 can detect the influence of the vibration of finger pulse on the infrared rays emitted by the infrared emission tube, and the receiving tube converts the optical signals into electric signals to be output at the output end. The first operational amplifier is used as a voltage follower to send the voltage of the photoelectric switch to the next stage, the second operational amplifier amplifies the signal, the third operational amplifier is a low-pass filter and mainly filters the power supply noise interference of 50HZ, the last operational amplifier plays a role of secondary amplification, the signal after filtering and shaping is amplified again, and the amplified signal is output.

Drawings

Fig. 1 is a schematic diagram of the present invention.

FIG. 2 is a diagram of a PCB of the present invention.

FIG. 3 is a waveform diagram of the output of the present invention.

Detailed Description

The invention is further described in detail with reference to the following specific examples and the accompanying drawings. The procedures, conditions, experimental methods and the like for carrying out the present invention are general knowledge and common general knowledge in the art except for the contents specifically mentioned below, and the present invention is not particularly limited.

TCRT5000 is a reflective sensor consisting of a high-emission power infrared photodiode and a high-sensitivity phototransistor. The infrared emission tube in the sensor continuously emits infrared rays, when the emitted infrared rays are not reflected back or the reflection intensity is not large enough, the phototriode is always in an off state, and when the phototriode detects light, the current between C, E is increased and conducted. The stronger the reflected light, the greater the current. When the hand is put on, the infrared rays emitted by the infrared emission tube pass through the artery blood vessel and are reflected back by the finger bones, the intensity of the reflected signals changes along with the change of blood flow, and the receiving tube converts the signals into weak electric signals.

The circuit mainly comprises an infrared photoelectric switch TCRL5000, a voltage follower, an amplifier, a low-pass filter, a secondary amplifier and other circuits. The infrared photoelectric switch TCRL5000 can detect the influence of the vibration of finger pulse on the infrared rays emitted by the infrared emission tube, and the receiving tube converts the optical signals into electric signals to be output at the output end. The first operational amplifier is used as a voltage follower to send the voltage of the photoelectric switch to the next stage, the second operational amplifier amplifies the signal, the third operational amplifier is a low-pass filter and mainly filters the power supply noise interference of 50HZ, the last operational amplifier plays a role of secondary amplification, the signal after filtering and shaping is amplified again, and the amplified signal is output.

The protection of the present invention is not limited to the above embodiments. Variations and advantages that may occur to those skilled in the art may be incorporated into the invention without departing from the spirit and scope of the inventive concept, and the scope of the appended claims is intended to be protected.