CN206355041U - Pulses measure instrument - Google Patents

Abstract

The utility model discloses a kind of pulses measure instrument, including singlechip controller, photoelectric sensor, signal processor, display, alarm, keyboard；The output end of the photoelectric sensor is connected with the input of the signal processor；The output end of the signal processor is connected with the input of the singlechip controller；Input of the output end of the singlechip controller respectively with the display and the alarm is connected；The keyboard is connected with the input of the singlechip controller.A kind of pulses measure instrument that the utility model is provided is acquired and handled to pulse signal using photoelectric sensor and single-chip microcomputer, and precision is high, and cost is low；The real-time display pulse number of display screen, shows final Pulse Rate after one minute, and sends alarm sound, convenient and simple.

Description

pulse measuring instrument

technical field

The utility model relates to the field of medical instruments, in particular to a pulse measuring instrument.

Background technique

The pulse carries a large amount of information on the health status of the human body. Since the publication of the earliest monograph on pulse study in my country, "Mai Jing", in the third century AD, the theory of pulse study has been continuously developed and improved. Among the four diagnostic methods of traditional Chinese medicine (including looking, smelling, asking, and feeling), feeling (pulse diagnosis) occupies a very important position. As a means and method of "green non-invasive" diagnosis, pulse diagnosis has attracted the attention of Chinese and foreign people. The nurses in the hospital have to take the pulse of the hospitalized patients every day and record the patient's pulse rate per minute. The method is to press the arteries in the patient's wrist with their hands and count according to the beating of the pulse. In order to save time, generally do not make a 1-minute measurement, usually measure the number of heartbeats in 10 seconds, and then multiply the result by 6 to get the number of heartbeats per minute, even if it is time-consuming, and the accuracy is not good high.

Due to the different design principles and components, the existing pulse measuring instruments have different accuracy and price. Generally speaking, the high-priced ones have high precision, and the low-priced ones have low precision, which cannot be well adapted to actual measurement activities.

Utility model content

In order to solve the problems in the prior art, the embodiment of the utility model provides a pulse measuring instrument. Described technical scheme is as follows:

The utility model provides a pulse measuring instrument, comprising a single-chip controller, a photoelectric sensor, a signal processor, a display, an alarm, a keyboard; the connection between the output end of the photoelectric sensor and the input end of the signal processor; the signal The output end of processor is connected with the input end of described single-chip microcomputer controller; The output end of described single-chip microcomputer controller is connected with the input end of described display and described alarm respectively; The input of described keyboard and described single-chip microcomputer controller end connection.

Optionally, the single-chip controller includes a single-chip microcomputer, a power supply circuit, a crystal oscillator circuit, and a reset circuit; the input end of the power supply circuit is connected to an external DC 5V power supply, and the output end is connected to the single-chip controller, photoelectric sensor, signal The power supply pins of the processor, the display, the alarm, and the keyboard are connected; the reset circuit is connected with the reset pin of the single-chip microcomputer; the crystal oscillator circuit is connected with the external crystal oscillator pins of the single-chip microcomputer.

Optionally, the single-chip microcomputer is a STC89C51 single-chip microcomputer.

Optionally, the photoelectric sensor includes an infrared emitting diode and an infrared receiving transistor; the infrared emitting diode is connected to the power supply pin of the power supply circuit through a current limiting resistor, and the infrared receiving transistor is connected to the input terminal of the signal processor.

Optionally, the infrared emitting diode and the infrared receiving triode are placed opposite to each other, including horizontal placement and vertical placement, with an interval of 2-3 cm.

Optionally, the signal processor includes a signal acquisition circuit, a signal amplification circuit, and a signal comparison circuit; the output signal of the photoelectric sensor enters the single-chip microcomputer after passing through the signal acquisition circuit, the signal amplification circuit, and the signal comparison circuit in sequence.

Optionally, the display includes a display screen and an interface circuit; the display screen is connected to the single-chip microcomputer through the interface circuit.

Optionally, the display screen is an LCD1602 liquid crystal display screen.

Optionally, the alarm includes a buzzer and an alarm circuit; the buzzer is connected to the single-chip microcomputer through the alarm circuit.

Optionally, the keyboard includes a button and a keyboard circuit; the button is connected to the single-chip microcomputer through the keyboard circuit.

The beneficial effects brought by the technical solution provided by the embodiment of the utility model are:

1) The pulse signal is collected and processed by a photoelectric sensor and a single-chip microcomputer, with high precision and low cost.

2) The display screen displays the pulse rate in real time, and the final pulse rate will be displayed after one minute, and an alarm sound will be issued, which is convenient and simple.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some implementations of the present invention. For example, those of ordinary skill in the art can also obtain other drawings based on these drawings on the premise of not paying creative efforts.

Fig. 1 is the pulse measuring instrument module schematic diagram of the utility model embodiment;

Fig. 2 is the pulse measuring instrument signal acquisition circuit diagram of the utility model embodiment;

Fig. 3 is the pulse measuring instrument signal amplifying circuit diagram of the utility model embodiment;

Fig. 4 is a signal comparison circuit diagram of the pulse measuring instrument according to the embodiment of the present invention.

detailed description

In order to make the purpose, technical solutions and advantages of the present utility model clearer, the implementation of the present utility model will be further described in detail below in conjunction with the accompanying drawings.

The utility model provides a pulse measuring instrument, referring to Fig. 1, comprising a single-chip controller 100, a photoelectric sensor 110, a signal processor 120, a display 130, an alarm 140, a keyboard 150; the output terminal of the photoelectric sensor 110 is connected to the The input end of the signal processor 120 is connected; the output end of the signal processor 120 is connected with the input end of the single-chip controller 100; the output end of the single-chip controller 100 is respectively connected with the display 130 and the alarm The input terminal of the device 140 is connected; the keyboard 150 is connected with the input terminal of the single-chip microcomputer controller 100 .

In this embodiment, the single-chip controller 100 includes a single-chip microcomputer, a power supply circuit, a crystal oscillator circuit, and a reset circuit. The input end of described power supply circuit is connected with external direct current 5V power supply, and output end is connected with the power supply VCC (VoltCurrent Condenser, Power supply) pin connection; The reset circuit is connected with the reset RST (Reset, reset) pin of the single-chip microcomputer; The crystal oscillator circuit is connected with the external crystal oscillator XTAL (External Crystal Oscillator, external crystal oscillator) pin of the single-chip microcomputer. The single-chip microcomputer, the crystal oscillator circuit and the reset circuit constitute the minimum system of the single-chip microcomputer, and the power supply circuit provides working power for each power-consuming module.

In this embodiment, the single-chip microcomputer is a STC89C51 single-chip microcomputer.

In this embodiment, the photoelectric sensor 110 includes an infrared emitting diode and an infrared receiving triode. The infrared emitting diode is connected to the VCC pin of the power supply circuit through a current limiting resistor, and the infrared receiving transistor is connected to the input terminal of the signal processor. The photoelectric sensor 110 collects signals with the same frequency as the heartbeat. When the translucency of the human tissue is large, the light intensity emitted by the infrared emitting diode through the human tissue is very weak, and the infrared receiving transistor cannot be turned on and outputs a high level; When the translucency value of the human tissue is small, the light intensity emitted by the infrared emitting diode through the human tissue is relatively strong, the infrared receiving transistor is turned on, and the output is low level. In this way, a low-frequency signal whose frequency is proportional to the number of pulses is formed, which is a waveform approximately sinusoidal.

In this embodiment, the infrared emitting diode and the infrared receiving triode are placed opposite to each other, including horizontal placement and vertical placement, with an interval of 2-3 cm, and the front end of the finger is placed at the interval during measurement.

In this embodiment, the signal processor 120 includes a signal acquisition circuit, a signal amplification circuit, and a signal comparison circuit. Because the pulse signal output by the photoelectric sensor 110 is a very weak signal, and the frequency is very low (such as pulse 50 times/minute is 0.78Hz, 200 times/minute is 3.33Hz), and also accompanied by various noise interference, so the signal It needs to be filtered by the RC oscillator of the signal acquisition circuit to eliminate high-frequency interference, see Figure 2, and be added to the input terminal of the operational amplifier of the signal amplification circuit through non-polar DC blocking capacitors C3 and C5. Referring to Figure 3, the operational amplifier amplifies this signal by 100 times, and a low-pass T-shaped filter composed of R3, R4, and C6 filters out residual interference. Referring to FIG. 4 , the sinusoidal signal is converted into a long pulse signal with the same frequency by the signal comparison circuit, and the pulse signal is sent to the single-chip processor 100 through the resistor R12.

In this embodiment, the display 130 includes a display screen and an interface circuit. The display screen is connected with the single-chip microcomputer through the interface circuit. The signal processed by the single-chip controller 100 is output to the display screen through the interface circuit, and the display screen displays the pulse rate in real time.

In this embodiment, the display screen is an LCD1602 liquid crystal display screen.

In this embodiment, the alarm 140 includes a buzzer and an alarm circuit. The buzzer is connected with the single-chip microcomputer through the alarm circuit. The alarm signal sent by the single-chip controller 100 is output to the buzzer through the alarm circuit, and an alarm sound is sent.

In this embodiment, the keyboard 150 includes buttons and a keyboard circuit. The button is connected with the single-chip microcomputer through the keyboard circuit. The keypad 150 can set the start and stop of the pulse measurement.

To sum up, the pulse measuring instrument provided by the embodiment of the utility model adopts photoelectric sensor and single-chip microcomputer to collect and process the pulse signal, which has high precision and low cost; the display screen displays the pulse number in real time, and displays the final pulse after one minute Number, and an alarm sound, convenient and simple.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (10)

1. A pulse measuring instrument is characterized in that, comprises single-chip microcomputer controller, photoelectric sensor, signal processor, display, alarm, keyboard; The output end of the photoelectric sensor is connected to the input end of the signal processor; The output terminal of the signal processor is connected with the input terminal of the single-chip microcomputer controller; The output end of the single-chip controller is connected with the input end of the display and the alarm respectively; The keyboard is connected with the input end of the single-chip controller. 2. pulse measuring instrument as claimed in claim 1, is characterized in that, described single-chip controller comprises single-chip microcomputer, power supply circuit, crystal oscillator circuit, reset circuit; The input end of the power supply circuit is connected with an external DC 5V power supply, and the output end is connected with the power supply pins of the single-chip controller, photoelectric sensor, signal processor, display, alarm, keyboard; The reset circuit is connected to the reset pin of the single-chip microcomputer; The crystal oscillator circuit is connected to the external crystal oscillator pin of the single chip microcomputer. 3. pulse measuring instrument as claimed in claim 2, is characterized in that, described single-chip microcomputer is STC89C51 single-chip microcomputer. 4. pulse measuring instrument as claimed in claim 2, is characterized in that, described photoelectric sensor comprises infrared emitting diode and infrared receiving triode; The infrared emitting diode is connected to the power supply pin of the power supply circuit through a current limiting resistor, and the infrared receiving transistor is connected to the input end of the signal processor. 5. The pulse measuring instrument according to claim 4, wherein the infrared emitting diode and the infrared receiving triode are placed oppositely, including horizontally and vertically, with an interval of 2-3cm. 6. pulse measuring instrument as claimed in claim 2, is characterized in that, described signal processor comprises signal acquisition circuit, signal amplification circuit, signal comparison circuit; Described photoelectric sensor output signal passes through signal acquisition circuit, signal amplification circuit successively , enter the single-chip microcomputer after the signal comparison circuit. 7. The pulse measuring instrument according to claim 2, wherein the display comprises a display screen and an interface circuit; the display screen is connected to the single-chip microcomputer through the interface circuit. 8. The pulse measuring instrument according to claim 7, wherein the display screen is an LCD1602 liquid crystal display screen. 9. The pulse measuring instrument according to claim 2, wherein the alarm includes a buzzer and an alarm circuit; the buzzer is connected with the single-chip microcomputer through the alarm circuit. 10. The pulse measuring instrument according to claim 2, wherein the keyboard comprises a button and a keyboard circuit; the button is connected with the single-chip microcomputer through the keyboard circuit.