CN213787363U

CN213787363U - Pulse body temperature tester

Info

Publication number: CN213787363U
Application number: CN202022378816.1U
Authority: CN
Inventors: 郭业才; 胡国乐; 李晨; 李太初
Original assignee: Binjiang College of Nanjing University of Information Engineering
Current assignee: Binjiang College of Nanjing University of Information Engineering
Priority date: 2020-10-23
Filing date: 2020-10-23
Publication date: 2021-07-27
Anticipated expiration: 2030-10-23

Abstract

The utility model discloses a pulse body temperature tester, which comprises a singlechip minimum system circuit, a sensor module, a signal processing module, a display module and an alarm module, wherein the sensor module, the signal processing module, the display module and the alarm module are respectively connected with the singlechip minimum system circuit; the sensor module collects body temperature and heart rate signals, the heart rate signals are processed by the signal processing module, the single chip microcomputer displays the body temperature and the heart rate signals through the display module, and the single chip microcomputer controls the alarm module to perform early warning on the body temperature and the heart rate numerical values. The utility model provides a pulse body temperature tester has the advantage that the volume is less, easily carry, low cost, simple and easy practicality, and is obvious directly perceived to the test effect of human body temperature and pulse.

Description

Pulse body temperature tester

Technical Field

The utility model relates to a singlechip minimum system circuit especially relates to a pulse body temperature tester.

Background

At present, the single chip microcomputer permeates into various fields of our lives, and the single chip microcomputer is not separated from various widely used intelligent IC cards, full-automatic washing machines, network communication and data transmission from remote control toys to computers, real-time control and data processing of industrial automation processes, control of various instruments on airplanes and the like. The single chip microcomputer relates to the fields of intelligent management and process control of instruments, household appliances, medical equipment, aerospace, special equipment and the like.

The single chip microcomputer is an integrated circuit chip. It adopts super large scale technology to integrate the microprocessor (CPU) with data processing capacity, memory (including program memory ROM and data memory RAM), input and output interface circuit (I/O interface) on the same chip to form a small and perfect computer hardware system, and can accurately, quickly and efficiently complete the tasks prescribed by the program designer under the control of the program of the single chip.

The minimum system circuit of the single chip generally comprises: singlechip, crystal oscillator circuit, reset circuit.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: the utility model aims at providing a pulse body temperature tester through the external temperature measurement module of the minimum system circuit of singlechip and rhythm of the heart test module, gathers and shows body temperature and rhythm of the heart signal in real time, realizes simple and easy practical pulse body temperature tester.

The technical scheme is as follows: the utility model provides a pulse body temperature tester, which comprises a singlechip minimum system circuit, a sensor module, a signal processing module, a display module and an alarm module, wherein the sensor module, the signal processing module, the display module and the alarm module are respectively connected with the singlechip minimum system circuit; the sensor module collects body temperature and heart rate signals, the heart rate signals are processed by the signal processing module, the single chip microcomputer displays the body temperature and the heart rate signals through the display module, and the single chip microcomputer controls the alarm module to perform early warning on the body temperature and the heart rate numerical values.

Wherein, the sensor module includes temperature measurement module and heart rate test module.

Preferably, the heart rate test module is an infrared reflection sensor.

Preferably, the signal processing module includes a signal acquisition circuit, a pre-stage amplification circuit, a filter shaping circuit, a post-stage amplification circuit and a shaping circuit, which are connected in sequence by signals.

Preferably, the filter shaping circuit module is composed of an operational amplifier LM324 and an RC network.

Preferably, the device further comprises a key circuit connected with the minimum system circuit of the single chip microcomputer, and the key circuit changes the default body temperature and heart rate threshold parameters in the single chip microcomputer.

Has the advantages that: compared with the prior art, the utility model has the advantages of as follows: the sensor module based on single chip microcomputer control is used for collecting human body temperature and heart rate signals in real time and displaying the signals in real time through the display module, the alarm module carries out threshold value alarm on the signal parameters, the instrument is simple in structure and high in practicability, the instrument is small in size and convenient to carry and use, and the test effect is obvious and visual.

Drawings

FIG. 1 is a flow chart of the system of the present invention;

FIG. 2 is a circuit diagram of the external active crystal oscillator of the present invention;

FIG. 3 is a reset circuit of the present invention;

FIG. 4 is the alarm circuit of the present invention;

fig. 5 is a heart rate acquisition circuit of the present invention;

FIG. 6 is the preceding stage amplifying circuit of the present invention;

fig. 7 is a filter shaping circuit of the present invention;

FIG. 8 is a rear stage amplifying circuit of the present invention;

fig. 9 is a shaping circuit of the present invention;

fig. 10 is a circuit diagram of the DS18B20 of the present invention;

fig. 11 is a circuit diagram of the LCD12864 of the present invention;

fig. 12 is the pin diagram of the STC89C52 single chip microcomputer of the present invention.

Detailed Description

The technical solution of the present invention will be further explained with reference to the accompanying drawings.

Fig. 1 is a system flow chart of the present invention, a single chip microcomputer, a crystal oscillator circuit shown in fig. 2 and a reset circuit shown in fig. 3 constitute a minimum system circuit of the single chip microcomputer, and a sensor module, a signal processing module, a display module and an alarm module which are in signal connection with the minimum system circuit realize a pulse and body temperature test function together; the sensor module comprises temperature measurement module and rhythm of the heart test module for gather body temperature and rhythm of the heart signal, wherein, the rhythm of the heart signal is handled by signal processing module, and the singlechip shows body temperature and rhythm of the heart signal through display module, and simultaneously, singlechip control alarm module carries out the early warning to body temperature and rhythm of the heart threshold value.

In fig. 2, a pin X1 of a single chip microcomputer STC89C52 is simultaneously connected to one end of a crystal oscillator Y1 and one end of a capacitor C2, a pin X2 of the single chip microcomputer STC89C52 is simultaneously connected to the other end of a crystal oscillator Y1 and one end of a capacitor C3, and the other end of the capacitor C2 and the other end of the capacitor C3 are simultaneously grounded.

In fig. 3, the RST pin of the single-chip STC89C52 is connected to one end of a resistor R9, one end of a capacitor C4 and one end of a resistor R10, the other end of the resistor R9 is connected to a key switch and then connected to a power VCC with the other end of a capacitor C4, and the other end of the resistor R10 is grounded to GND.

As shown in figure 4, the output end of the alarm circuit is connected with a P20 port of a single chip microcomputer STC89C52, and when the single chip microcomputer detects that the real-time body temperature and the heart rate exceed the default values, the buzzer can send out early warning signals.

As shown in fig. 5, the heart rate acquisition circuit adopts an infrared reflection sensor, the pulse signal acquisition and processing circuit is as shown in fig. 5 to 9, an Output end Output1 of the heart rate acquisition circuit is connected with an Input end 2 of the pre-stage amplification circuit shown in fig. 6, an Output end Output2 of the pre-stage amplification circuit is connected with an Input end 3 of the filter shaping circuit shown in fig. 7, an Output end Output3 of the filter shaping circuit is connected with an Input end 4 of the post-stage amplification circuit shown in fig. 8, an Output end Output4 of the post-stage amplification circuit is connected with an Input end 5 of the shaping circuit shown in fig. 9, and an Output end Output5 of the shaping circuit is connected with a P21 port of a single chip microcomputer STC89C 52.

As shown in fig. 6, the pre-stage amplifier circuit has a function of amplifying an input pulse signal and outputting the amplified pulse signal, and can convert a signal source having a high impedance characteristic into a signal having a low impedance and output the signal, thereby easily driving a rear-stage line.

As shown in fig. 7, the filtering and shaping circuit is composed of an operational amplifier LM324 and an RC network, and functions to receive the pulse signal amplified by the pre-stage amplifier circuit and remove the influence of the interference signal.

The post-stage amplifying circuit is shown in fig. 8, and functions to receive the filtered and shaped signal and perform further amplification processing to promote normal operation of the load.

As shown in fig. 9, the shaping circuit has a function of performing a distortion or conversion process on a waveform to prevent distortion or aliasing of a signal.

As shown in FIG. 10, the temperature measuring circuit adopts DS18B20, and the output of the temperature measuring circuit is connected with the P3.7 port of the singlechip.

As shown in fig. 11, the display circuit adopts an LCD12864 including a variable resistor, and the data communication port is connected with the port P0 of the single chip microcomputer.

The pin diagram of the single chip microcomputer STC89C52 shown in figure 12.

The pulse temperature tester works as follows: after the single chip microcomputer is powered on, a key in the reset circuit is pressed to start the machine, and the temperature module acquires the temperature of the human body in real time and feeds the temperature value back to the single chip microcomputer; the single chip microcomputer processes the temperature data and then transmits the temperature data to a display screen in the display module for displaying the human body temperature value in real time; the singlechip compares the acquired temperature value with a set temperature parameter value for judgment, and if the acquired temperature value is higher than or fixed in a set range value, the singlechip starts a buzzer in the alarm module for early warning and transmits a human body temperature abnormal signal; the heart rate acquisition circuit adopts infrared reflection sensor, and human pulse signal is gathered to the module, and this weak signal needs to detect and show in the display screen through the monolithic after a series of signal processing, if the heart rate value of gathering is higher than or is fixed in the scope value of settlement, then the singlechip starts the bee calling organ among the alarm module and does the early warning, transmits human heart rate abnormal signal.

The instrument can also be provided with a key module for changing the set upper limit value and lower limit value of the temperature and heart rate parameters and carrying out adaptive adjustment on the pulse and body temperature threshold value.

Claims

1. A pulse and body temperature tester comprises a single chip microcomputer minimum system circuit, and is characterized by further comprising a sensor module, a signal processing module, a display module and an alarm module which are respectively connected with the single chip microcomputer minimum system circuit; the sensor module collects body temperature and heart rate signals, the heart rate signals are processed by the signal processing module, the single chip microcomputer displays the body temperature and the heart rate signals through the display module, and the single chip microcomputer controls the alarm module to perform early warning on body temperature and heart rate numerical values.

2. The pulse-body temperature tester of claim 1, wherein the sensor module comprises a temperature measurement module and a heart rate test module.

3. The pulse-body temperature tester according to claim 2, wherein the heart rate test module is an infrared reflection sensor.

4. The pulse-body temperature tester according to claim 1, wherein the signal processing module comprises a signal acquisition circuit, a pre-stage amplification circuit, a filter shaping circuit, a post-stage amplification circuit and a shaping circuit which are connected in sequence by signals.

5. The pulse-body temperature tester according to claim 4, wherein the filter shaping circuit is composed of an operational amplifier LM324 and an RC network.

6. The pulse body temperature tester of claim 1 further comprising a key circuit connected to the minimal system circuit of the single chip, the key circuit changing body temperature and heart rate threshold parameters in the single chip.