CN208837927U - A kind of pulse and temperature monitor - Google Patents

Abstract

The utility model discloses a kind of pulse and temperature monitors, including single-chip microcontroller, power circuit, crystal oscillating circuit and reset circuit, the input of single-chip microcontroller is terminated with key circuit, pulse detection circuit and temperature check circuit, pulse detection circuit includes that infrared transmitting tube, infrared receiving tube, the first signal amplification sample circuit, filter circuit and sinusoidal signal turn square-wave signal circuit, and the input terminal of output end and single-chip microcontroller that sinusoidal signal turns square-wave signal circuit connects；Temperature check circuit includes sequentially connected PT100 temperature sensor, second signal amplification sample circuit and A/D conversion circuit, and the output end of A/D conversion circuit and the input terminal of single-chip microcontroller connect；The output of single-chip microcontroller is terminated with liquid crystal display circuit and warning circuit.The utility model circuit structure is simple, and it is convenient and at low cost to realize, can collect more accurate pulse and temperature signals, complete function, the physiological status of more easily appraiser is capable of after use, convenient for promoting the use of.

Description

A kind of pulse and temperature monitor

Technical field

The utility model relates to intelligent testing technology fields, and in particular to a kind of pulse and temperature monitor.

Background technique

With the continuous development of modern medical science, requirement of the people to various detecting instruments is also higher and higher, and pulse Measurement with body temperature is the method for most basic appraiser's physiological status, it can be seen that research pulse, body temperature detection method with And the importance of device.As the important topic that modern electronic equipment equipment is combined with medicine, have and its far-reaching meaning Justice.

In the prior art, pulse detector and clinical thermometer are mostly separated.There are mainly three types of sides for the acquisition of current pulse Method: it realized using a pair of of red light emitting diodes, realized using ceramic chips and is realized using reflective infrared tube. Using a pair of of red light emitting diodes, when internal blood is sent to each tissue, the translucence of tissue can reduce, and work as blood When liquid flows back into heart, the translucence of tissue be will increase.The portions such as the finger of human body are being irradiated with infrared light-emitting diode When position, then the signal can be amplified by measuring the transparency of tissue and be converted into electric signal, it is most laggard Row shaping just obtains the pulse frequency of human body.Piezoelectric ceramic piece is to acquire signal by beat pulse, as heart is jumped Dynamic, the pulse of wrist and the beat pulse of neck are obvious, piezoelectric ceramic piece are placed on above-mentioned position, so that it may piezoelectric ceramic piece The signal measured changes pulse signal into, can equally obtain pulse frequency.Pulse test meter currently on the market generallys use reflection The infrared tube of formula does not have to consider that the difference in size of a finger is drawn because infrared tube receives and transmitting is ipsilateral in finger The trouble risen, but signal acquisition can be relatively difficult.

Current clinical thermometer is roughly divided into contact and contactless two class, and as its name suggests, non-contact be to pass through to contact The infrared ray that detection detected material radiates achieves the goal.The change transitions of temperature are divided into two major classes at the amount that can be measured, Thermal resistance sensor and thermocouple sensor.Thermal resistance sensor can be divided into thermal resistance and thermistor again.Common thermal resistance There is platinum, copper, iron etc., advantage has high resistivity, performance are stable, linear output character is good etc.；Common thermal resistance sensor has PT100, CU50 etc..There are also intelligent temperature sensors, it is by the combination of microelectronics, computer and ATE technology.In recent years go out successively Existing digital temperature sensor, such as DS1B20 temperature sensor is Single Wire Bus Technology, interface is simple, is in the nature that number is defeated Out, but the disadvantage is that temperature-measuring range is narrow, only between -55-125 degree, and precision is not high, and 2 degree of error or so, therefore in high request Occasion less meet demand.At present thermocouple application it is also very extensive, its advantages be it is simple and convenient, measurement range is wide, Thermal inertia is smaller, and precision is high, and signal is convenient for teletransmission etc..Its temperature-measuring range is big and error is small, is better than digital temperature in performance Sensor, but a disadvantage is that thermocouple sensor need to add peripheral signal amplifying circuit, A/D conversion circuit etc. handles signal, if It counts more complicated.

Utility model content

The technical problem to be solved by the utility model is in view of the deficiency of the prior art, provide a kind of pulse And temperature monitor, circuit structure is simple, and it is convenient and at low cost to realize, can collect more accurate pulse and body temperature letter Number, complete function is capable of the physiological status of more easily appraiser after use, using effect is good, convenient for promoting the use of.

In order to solve the above technical problems, the technical solution adopted in the utility model is: a kind of pulse and temperature monitor, It is characterized in that: including single-chip microcontroller and for the power circuit of electricity consumption module for power supply each in detector, and the crystalline substance to connect with single-chip microcontroller Shake circuit and reset circuit；The input of the single-chip microcontroller is terminated with key circuit, pulse detection circuit and temperature check circuit, institute Stating pulse detection circuit includes for being separately positioned on finger two sides for detecting the infrared transmitting tube of finger pulse and infrared connecing Closed tube, and the first signal connecting with infrared receiving tube amplify sample circuit, amplify what sample circuit was connect with the first signal Filter circuit and the sinusoidal signal connecting with filter circuit turn square-wave signal circuit, and the sinusoidal signal turns square-wave signal circuit The connection of the input terminal of output end and single-chip microcontroller；The temperature check circuit includes sequentially connected PT100 temperature sensor, second Signal amplifies sample circuit and A/D conversion circuit, and the output end of the A/D conversion circuit and the input terminal of single-chip microcontroller connect；Institute The output for stating single-chip microcontroller is terminated with liquid crystal display circuit and warning circuit.

A kind of above-mentioned pulse and temperature monitor, it is characterised in that: the single-chip microcontroller includes single-chip microcontroller STC89C52, institute State one end and nonpolar capacitor that crystal oscillating circuit includes crystal oscillator Y1, nonpolarity capacitor C5 and nonpolar capacitor C6, the crystal oscillator Y1 One end of C5 is connect with the 18th pin of single-chip microcontroller STC89C52, and the one of the other end of the crystal oscillator Y1 and nonpolar capacitor C6 End is connect with the 19th pin of single-chip microcontroller STC89C52, and the other end of the nonpolarity capacitor C5 is another with nonpolar capacitor C6's One end is grounded；The reset circuit includes reset key RESET, resistance R12 and polar capacitor C4, the reset key The cathode of one end of RESET, one end of resistance R12 and polar capacitor C4 is connect with the 9th pin of single-chip microcontroller STC89C52, institute The anode of the other end and polar capacitor C4 of stating reset key RESET is connect with+the 5V of power circuit voltage output end, described The other end of resistance R12 is grounded.

A kind of above-mentioned pulse and temperature monitor, it is characterised in that: the key circuit include key S1, key S2 and Key S3, one end of the key S1 are connect with the 15th pin of single-chip microcontroller STC89C52, and the other end of the key S1 passes through Resistance R13 ground connection；One end of the key S2 is connect with the 16th pin of single-chip microcontroller STC89C52, the other end of the key S2 It is grounded by resistance R14；One end of the key S3 is connect with the 17th pin of single-chip microcontroller STC89C52, and the key S3's is another One end is grounded by resistance R15.

A kind of above-mentioned pulse and temperature monitor, it is characterised in that: the infrared transmitting tube is infrared transmitting tube D1, institute The anode for stating infrared transmitting tube D1 is connected by+5V the voltage output end of resistance R1 and power circuit, the infrared transmitting tube D1 Minus earth；The infrared receiving tube is infrared receiving tube D2, and the plus earth of the infrared receiving tube D2 is described infrared to connect The cathode of closed tube D2 is connected by+5V the voltage output end of resistance R2 and power circuit, the anode of the infrared receiving tube D2 with Concatenated polar capacitor C1 and resistance R3 is parallel between cathode；The first signal amplification sample circuit includes amplifier chip + 5V the voltage output end of the 8th pin and power circuit of LM358 and slide rheostat RW1, the amplifier chip LM358 connects It connects, the 4th pin ground connection of the amplifier chip LM358, the 3rd pin and polar capacitor C1 of the amplifier chip LM358 It is connected with the connecting pin of resistance R3, the 2nd pin of the amplifier chip LM358 and the sliding end and one of slide rheostat RW1 A fixing end connection, another fixing end ground connection of the slide rheostat RW1, the 2nd pin of the amplifier chip LM358 And the 1st be connected to resistance R4 between pin, the both ends of the resistance R4 are parallel with nonpolar capacitor C2；The amplifier chip The 5th pin of LM358 is connect by nonpolarity capacitor C3 with the 1st pin of amplifier chip LM358, the amplifier chip The 6th pin of LM358 is connected by+5V the voltage output end of resistance R6 and power circuit, and is grounded by resistance R5, described to put The 7th pin of big device chip LM358 is the output end FD0UT that the first signal amplifies sample circuit, and is grounded by resistance R7.

A kind of above-mentioned pulse and temperature monitor, it is characterised in that: the filter circuit includes resistance R18, resistance The output of one end and the first signal amplification sample circuit of R19, nonpolarity capacitor C7 and nonpolar capacitor C8, the resistance R18 FD0UT connection is held, the other end of the resistance R18 is connect with one end of resistance R19, and is grounded by nonpolarity capacitor C7, institute The other end for stating resistance R19 is the output end of filter circuit and is grounded by nonpolarity capacitor C8.

A kind of above-mentioned pulse and temperature monitor, it is characterised in that: the sinusoidal signal turns square-wave signal circuit and includes The 8th pin of comparator chip LM393, the comparator chip LM393 and the+5V voltage output end of power circuit connect, institute State the 4th pin ground connection of comparator chip LM393, the 1st pin of the comparator chip LM393 by nonpolarity capacitor C9 and The output end of filter circuit connects, and the 2nd pin of the comparator chip LM393 passes through the+5V of resistance R21 and power circuit electricity Output end connection is pressed, and is grounded by resistance R20, the 1st pin of the comparator chip LM393 is grounded by resistance R22, institute State comparator chip LM393 the 1st pin be sinusoidal signal turn square-wave signal circuit output end and with single-chip microcontroller STC89C52 The 13rd pin connection.

A kind of above-mentioned pulse and temperature monitor, it is characterised in that: the 1st pin of the PT100 temperature sensor is logical Concatenated resistance R8 and resistance R9 ground connection is crossed, the 2nd pin of the PT100 temperature sensor is grounded by resistance R10；Described Binary signal amplification sample circuit includes amplifier chip INA128 and slide rheostat RW2, the amplifier chip INA128's 1st pin is connect with a fixing end and sliding end of slide rheostat RW2, the 8th pin of the amplifier chip INA128 It is connect with another fixing end of slide rheostat RW2, the 2nd pin and PT100 temperature of the amplifier chip INA128 passes 2nd pin of sensor connects, and the 3rd pin of the amplifier chip INA128 is connect with the connecting pin of resistance R8 and resistance R9, The 7th pin of the amplifier chip INA128 and the+12V voltage output end of power circuit connect, the amplifier chip The 4th pin of INA128 and the -12V voltage output end of power circuit connect, and the 5th pin of the amplifier chip INA128 connects Ground, the 6th pin of the amplifier chip INA128 are the output end that second signal amplifies sample circuit.

A kind of above-mentioned pulse and temperature monitor, it is characterised in that: the A/D conversion circuit includes A/D conversion chip The 6th pin and the 22nd pin of ADC0809, the A/D conversion chip ADC0809 with the 21st pin of single-chip microcontroller STC89C52 Connection, the 7th pin of the A/D conversion chip ADC0809 are connect with the 22nd pin of single-chip microcontroller STC89C52, and the A/D turns The 8th pin for changing chip ADC0809 is connect with the 4th pin of single-chip microcontroller STC89C52, the A/D conversion chip ADC0809's 9th pin is connect with the 23rd pin of single-chip microcontroller STC89C52, the 10th pin and monolithic of the A/D conversion chip ADC0809 The 24th pin of machine STC89C52 connects, and the 11st pin and the 12nd pin of the A/D conversion chip ADC0809 is electric with power supply + 5V the voltage output end on road connects, the 13rd pin, the 16th pin, the 23rd pin, the 24th of the A/D conversion chip ADC0809 Pin and the 25th pin are grounded, and the 14th pin of the A/D conversion chip ADC0809 draws with the 2nd of single-chip microcontroller STC89C52 Foot connection, the 15th pin of the A/D conversion chip ADC0809 are connect with the 3rd pin of single-chip microcontroller STC89C52, the A/D The 17th pin of conversion chip ADC0809 is connect with the 1st pin of single-chip microcontroller STC89C52, the A/D conversion chip ADC0809 The 18th pin connect with the 5th pin of single-chip microcontroller STC89C52, the 19th pin and list of the A/D conversion chip ADC0809 The 6th pin of piece machine STC89C52 connects, and the 20th pin of the A/D conversion chip ADC0809 is with single-chip microcontroller STC89C52's The connection of 7th pin, the 21st pin of the A/D conversion chip ADC0809 are connect with the 8th pin of single-chip microcontroller STC89C52, institute The 26th pin for stating A/D conversion chip ADC0809 is connect with the output end of second signal amplification sample circuit.

A kind of above-mentioned pulse and temperature monitor, it is characterised in that: the liquid crystal display circuit includes liquid crystal display The 1st pin of LCD1602, slide rheostat RW3 and triode Q2, the liquid crystal display LCD1602 ground connection, the liquid crystal The 2nd pin of display screen LCD1602 and the 15th pin are connect with+the 5V of power circuit voltage output end, the liquid crystal display The 3rd pin of LCD1602 is connect with the sliding end of slide rheostat RW3, a fixing end and electricity of the slide rheostat RW3 + 5V the voltage output end of source circuit connects, another fixing end ground connection of the slide rheostat RW3, the liquid crystal display The 4th~6 pin of LCD1602 is corresponding in turn to be connect with the 25th~27 pin of single-chip microcontroller STC89C52, the liquid crystal display The 7th~14 pin of LCD1602 is corresponding in turn to be connect with the 39th~32 pin of single-chip microcontroller STC89C52, the liquid crystal display The 16th pin of LCD1602 is connect with the emitter of triode Q2, the grounded collector of the triode Q2, the triode Q2 Base stage connect with the 28th pin of single-chip microcontroller STC89C52 by resistance R11.

A kind of above-mentioned pulse and temperature monitor, it is characterised in that: the warning circuit includes triode Q1 and buzzing The base stage of device BUZZER, the triode Q1 are connect by resistance R16 with the 10th pin of single-chip microcontroller STC89C52, three pole The emitter of the grounded collector of pipe Q1, the triode Q1 is connect with the cathode of buzzer BUZZER, the buzzer The anode of BUZZER is connected by+5V the voltage output end of resistance R17 and power circuit.

Compared with the prior art, the utility model has the following advantages:

1, the utility model uses modular design, and circuit structure is simple, and it is convenient and at low cost to realize.

2, the utility model acquires pulse signal in finger two sides using infrared transmitting tube and infrared receiving tube, and passes through the One signal amplification sample circuit, filter circuit and sinusoidal signal turn to export after square-wave signal circuit improves signal to monolithic Machine can collect more accurate pulse signal.

3, the utility model uses PT100 temperature sensor contact temperature collection signal, and is amplified by second signal Output can collect more accurate body temperature letter to single-chip microcontroller after sample circuit and A/D conversion circuit improve signal Number.

4, the utility model can not only detect pulse and body temperature simultaneously, pass through liquid crystal display circuit display pulse and body Temperature, additionally it is possible to when pulse and body temperature exceed pre-set threshold range, make a sound alarm signal, complete function uses It is convenient.

5, the physiological status of more easily appraiser is capable of in the popularization and use of the utility model, and using effect is good, is convenient for It promotes the use of.

In conclusion the circuit structure of the utility model is simple, it is convenient and at low cost to realize, can collect more accurate Pulse and temperature signals, complete function is capable of the physiological status of more easily appraiser after use, using effect is good, just In popularization and use.

Below by drawings and examples, the technical solution of the utility model is described in further detail.

Detailed description of the invention

Fig. 1 is the schematic block circuit diagram of the utility model.

Fig. 2 is the circuit connection diagram of the utility model single-chip microcontroller, crystal oscillating circuit and reset circuit.

Fig. 3 is the circuit diagram of the utility model key circuit.

Fig. 4 is the circuit connection that the utility model infrared transmitting tube, infrared receiving tube and the first signal amplify sample circuit Figure.

Fig. 5 is the circuit connection diagram that the utility model filter circuit and sinusoidal signal turn square-wave signal circuit.

Fig. 6 is the electricity of the utility model PT100 temperature sensor, second signal amplification sample circuit and A/D conversion circuit Road connection figure.

Fig. 7 is the circuit diagram of the utility model liquid crystal display circuit.

Fig. 8 is the circuit diagram of the utility model warning circuit.

Description of symbols:

1-single-chip microcontroller；2-power circuits；3-crystal oscillating circuits；

4-reset circuits；5-key circuits；6-pulse detection circuits；

6-1-infrared transmitting tube；6-2-infrared receiving tube；The first signal of 6-3-amplifies sample circuit；

6-4-filter circuit；6-5-sinusoidal signal turns square-wave signal circuit；

7-temperature check circuits；7-1-PT100 temperature sensor；

7-2-second signal amplifies sample circuit；7-3-A/D conversion circuit；

8-liquid crystal display circuits；9-warning circuits.

Specific embodiment

As shown in Figure 1, the pulse and temperature monitor of the utility model, including single-chip microcontroller 1 and be each electricity consumption in detector The power circuit 2 of module for power supply, and the crystal oscillating circuit 3 and reset circuit 4 that connect with single-chip microcontroller 1；The input of the single-chip microcontroller 1 It is terminated with key circuit 5, pulse detection circuit 6 and temperature check circuit 7, the pulse detection circuit 6 includes for setting respectively Set and be used to detect the infrared transmitting tube 6-1 and infrared receiving tube 6-2 of finger pulse in finger two sides, and with infrared receiving tube 6- The first signals amplification sample circuit 6-3 of 2 connections, amplify with the first signal the filter circuit 6-4 that connect of sample circuit 6-3 and with The sinusoidal signal of filter circuit 6-4 connection turns square-wave signal circuit 6-5, and the sinusoidal signal turns the defeated of square-wave signal circuit 6-5 Outlet is connect with the input terminal of single-chip microcontroller 1；The temperature check circuit 7 include sequentially connected PT100 temperature sensor 7-1, Second signal amplifies sample circuit 7-2 and A/D conversion circuit 7-3, output end and the single-chip microcontroller 1 of the A/D conversion circuit 7-3 Input terminal connection；The output of the single-chip microcontroller 1 is terminated with liquid crystal display circuit 8 and warning circuit 9.

In the present embodiment, as shown in Fig. 2, the single-chip microcontroller 1 includes single-chip microcontroller STC89C52, the crystal oscillating circuit 3 includes One end of one end and nonpolarity capacitor C5 of crystal oscillator Y1, nonpolarity capacitor C5 and nonpolar capacitor C6, the crystal oscillator Y1 with list The 18th pin of piece machine STC89C52 connects, and one end of the other end of the crystal oscillator Y1 and nonpolarity capacitor C6 are and single-chip microcontroller The 19th pin of STC89C52 connects, and the other end of the other end of the nonpolarity capacitor C5 and nonpolar capacitor C6 are grounded； The reset circuit 4 includes reset key RESET, resistance R12 and polar capacitor C4, one end of the reset key RESET, electricity The cathode of one end and polar capacitor C4 for hindering R12 is connect with the 9th pin of single-chip microcontroller STC89C52, the reset key The other end of RESET and the anode of polar capacitor C4 are connect with+5V the voltage output end of power circuit 2, the resistance R12's Other end ground connection.

In the present embodiment, as shown in figure 3, the key circuit 5 includes key S1, key S2 and key S3, the key One end of S1 is connect with the 15th pin of single-chip microcontroller STC89C52, and the other end of the key S1 is grounded by resistance R13；It is described One end of key S2 is connect with the 16th pin of single-chip microcontroller STC89C52, and the other end of the key S2 is grounded by resistance R14； One end of the key S3 is connect with the 17th pin of single-chip microcontroller STC89C52, and the other end of the key S3 passes through resistance R15 Ground connection.

In the present embodiment, as shown in figure 4, the infrared transmitting tube 6-1 is infrared transmitting tube D1, the infrared transmitting tube D1 Anode connect with+5V the voltage output end of power circuit 2 by resistance R1, the minus earth of the infrared transmitting tube D1；Institute Stating infrared receiving tube 6-2 is infrared receiving tube D2, the plus earth of the infrared receiving tube D2, the yin of the infrared receiving tube D2 Pole is connect by resistance R2 with the+5V voltage output end of power circuit 2, between the anode and cathode of the infrared receiving tube D2 simultaneously It is associated with concatenated polar capacitor C1 and resistance R3；First signal amplification sample circuit 6-3 include amplifier chip LM358 and Slide rheostat RW1, the 8th pin of the amplifier chip LM358 is connect with+5V the voltage output end of power circuit 2, described The 4th pin of amplifier chip LM358 is grounded, the 3rd pin and polar capacitor C1 and resistance R3 of the amplifier chip LM358 Connecting pin connection, the 2nd pin of the amplifier chip LM358 and the sliding end of slide rheostat RW1 and a fixing end Connection, another fixing end ground connection of the slide rheostat RW1, the 2nd pin and the 1st of the amplifier chip LM358 draw Resistance R4 is connected between foot, the both ends of the resistance R4 are parallel with nonpolar capacitor C2；The 5th of the amplifier chip LM358 Pin is connect by nonpolarity capacitor C3 with the 1st pin of amplifier chip LM358, and the 6th of the amplifier chip LM358 is drawn Foot is connect by resistance R6 with the+5V voltage output end of power circuit 2, and is grounded by resistance R5, the amplifier chip The 7th pin of LM358 is the output end FD0UT that the first signal amplifies sample circuit 6-3, and is grounded by resistance R7.

In the present embodiment, as shown in figure 5, the filter circuit 6-4 includes resistance R18, resistance R19, nonpolar capacitor C7 It is connect with one end of nonpolar capacitor C8, the resistance R18 with the output end FD0UT of the first signal amplification sample circuit 6-3, institute The other end for stating resistance R18 is connect with one end of resistance R19, and is grounded by nonpolarity capacitor C7, and the resistance R19's is another End is the output end of filter circuit 6-4 and is grounded by nonpolarity capacitor C8.

In the present embodiment, as shown in Figure 2 and Figure 5, it includes comparator chip that the sinusoidal signal, which turns square-wave signal circuit 6-5, The 8th pin of LM393, the comparator chip LM393 are connect with+5V the voltage output end of power circuit 2, the comparator core The 4th pin of piece LM393 is grounded, and the 1st pin of the comparator chip LM393 passes through nonpolarity capacitor C9 and filter circuit 6- 4 output end connection, the 2nd pin of the comparator chip LM393 pass through the+5V voltage output of resistance R21 and power circuit 2 End connection, and be grounded by resistance R20, the 1st pin of the comparator chip LM393 is grounded by resistance R22, the comparison The 1st pin of device chip LM393 be sinusoidal signal turn the output end of square-wave signal circuit 6-5 and with single-chip microcontroller STC89C52 the The connection of 13 pins.

Since when heartbeat, corresponding regularity variation can occur for the transparency of tissue, because of tissue The change of transparency can block the signal transmission between the infrared transmitting tube 6-1 and infrared receiving tube 6-2 of a part, just cause A series of voltage change, but due to its signal be it is exceptionally weak, after infrared receiving tube 6-2, devise One signal amplifies sample circuit 6-3 to amplify, and then filters off clutter by filter circuit 6-4 again, improves the quality of waveform, Finally turning square-wave signal circuit 6-5 by sinusoidal signal again becomes circuit and square-wave waveform, and the amplitude of square wave is become 5V mark Quasi- digital level, Convenient bed sheet piece machine 1 identifies, finally exports to single-chip microcontroller 1.

In the present embodiment, as shown in fig. 6, the 1st pin of the PT100 temperature sensor 7-1 passes through concatenated resistance R8 It is grounded with resistance R9, the 2nd pin of the PT100 temperature sensor 7-1 is grounded by resistance R10；The second signal amplification Sample circuit 7-2 includes amplifier chip INA128 and slide rheostat RW2, the 1st pin of the amplifier chip INA128 It is connect with a fixing end and sliding end of slide rheostat RW2, the 8th pin of the amplifier chip INA128 and sliding become Another fixing end connection of device RW2 is hindered, the 2nd pin of the amplifier chip INA128 is with PT100 temperature sensor 7-1's The connection of 2nd pin, the 3rd pin of the amplifier chip INA128 is connect with the connecting pin of resistance R8 and resistance R9, described to put The 7th pin of big device chip I NA128 is connect with+12V the voltage output end of power circuit 2, the amplifier chip INA128's 4th pin is connect with -12V the voltage output end of power circuit 2, the 5th pin ground connection of the amplifier chip INA128, described The 6th pin of amplifier chip INA128 is the output end that second signal amplifies sample circuit 7-2.

Due to the change in resistance very little that PT100 temperature sensor 7-1 is varied with temperature, directly acquisition will exist very Big error needs to amplify signal by second signal amplification sample circuit 7-2.

In the present embodiment, as shown in Figure 2 and Figure 6, the A/D conversion circuit 7-3 includes A/D conversion chip ADC0809, institute The 6th pin and the 22nd pin for stating A/D conversion chip ADC0809 are connect with the 21st pin of single-chip microcontroller STC89C52, described The 7th pin of A/D conversion chip ADC0809 is connect with the 22nd pin of single-chip microcontroller STC89C52, the A/D conversion chip The 8th pin of ADC0809 is connect with the 4th pin of single-chip microcontroller STC89C52, the 9th pin of the A/D conversion chip ADC0809 It is connect with the 23rd pin of single-chip microcontroller STC89C52, the 10th pin and single-chip microcontroller of the A/D conversion chip ADC0809 The 24th pin of STC89C52 connects, and the 11st pin and the 12nd pin of the A/D conversion chip ADC0809 is and power circuit 2+5V voltage output end connection, the 13rd pin, the 16th pin, the 23rd pin, the 24th of the A/D conversion chip ADC0809 Pin and the 25th pin are grounded, and the 14th pin of the A/D conversion chip ADC0809 draws with the 2nd of single-chip microcontroller STC89C52 Foot connection, the 15th pin of the A/D conversion chip ADC0809 are connect with the 3rd pin of single-chip microcontroller STC89C52, the A/D The 17th pin of conversion chip ADC0809 is connect with the 1st pin of single-chip microcontroller STC89C52, the A/D conversion chip ADC0809 The 18th pin connect with the 5th pin of single-chip microcontroller STC89C52, the 19th pin and list of the A/D conversion chip ADC0809 The 6th pin of piece machine STC89C52 connects, and the 20th pin of the A/D conversion chip ADC0809 is with single-chip microcontroller STC89C52's The connection of 7th pin, the 21st pin of the A/D conversion chip ADC0809 are connect with the 8th pin of single-chip microcontroller STC89C52, institute The 26th pin for stating A/D conversion chip ADC0809 is connect with the output end of second signal amplification sample circuit 7-2.

In the present embodiment, as shown in Figure 2 and Figure 7, the liquid crystal display circuit 8 includes liquid crystal display LCD1602, sliding The 1st pin of rheostat RW3 and triode Q2, the liquid crystal display LCD1602 ground connection, the liquid crystal display LCD1602 The 2nd pin and the 15th pin connect with+5V the voltage output end of power circuit 2, the of the liquid crystal display LCD1602 3 pins are connect with the sliding end of slide rheostat RW3, a fixing end of the slide rheostat RW3 and power circuit 2+ The connection of 5V voltage output end, another fixing end ground connection of the slide rheostat RW3, the liquid crystal display LCD1602's 4th~6 pin is corresponding in turn to be connect with the 25th~27 pin of single-chip microcontroller STC89C52, the liquid crystal display LCD1602's 7th~14 pin is corresponding in turn to be connect with the 39th~32 pin of single-chip microcontroller STC89C52, the liquid crystal display LCD1602's 16th pin is connect with the emitter of triode Q2, the grounded collector of the triode Q2, and the base stage of the triode Q2 is logical Resistance R11 is crossed to connect with the 28th pin of single-chip microcontroller STC89C52.

In the present embodiment, as shown in Figure 2 and Figure 8, the warning circuit 9 includes triode Q1 and buzzer BUZZER, institute The base stage for stating triode Q1 is connect by resistance R16 with the 10th pin of single-chip microcontroller STC89C52, the current collection of the triode Q1 Pole ground connection, the emitter of the triode Q1 are connect with the cathode of buzzer BUZZER, and the anode of the buzzer BUZZER is logical Resistance R17 is crossed to connect with+5V the voltage output end of power circuit 2.

When the utility model is used, by using finger clamp, infrared transmitting tube 6-1 and infrared receiving tube 6-2 are set respectively It sets in finger two sides, infrared transmitting tube 6-1 emits infrared ray, and infrared receiving tube 6-2 receiving infrared-ray utilizes tissue transparency Change the influence variation to infrared emission and obtain heart rate pulse, exports analog waveform, then sample circuit is amplified by the first signal 6-3 is amplified, and is filtered by filter circuit 6-4, turns square-wave signal circuit 6-5 the waveform side of becoming by sinusoidal signal Wave circuit, and the amplitude of square wave is become to the digital level of 5V standard, then export to single-chip microcontroller 1, single-chip microcontroller 1 passes through the high electricity of detection Flat number detects the number of pulse, then pulse is transported on liquid crystal display circuit 8 by single-chip microcontroller 1 and shows reading；Together When, PT100 temperature sensor 7-1 is contacted with finger causes resistance to change, by second signal amplify sample circuit 7-2 into Row, which amplifies and is converted to export to single-chip microcontroller 1, then by single-chip microcontroller 1 after digital signal by A/D conversion circuit 7-3, conveys body temperature Reading is shown on to liquid crystal display circuit 8.In addition, on pulse and pre-set pulse that single-chip microcontroller 1 can also will test Lower threshold is compared to pair, and the body temperature that will test is compared with pre-set body temperature bound threshold value pair, when the arteries and veins detected When fighting beyond pulse bound threshold value or the body temperature detected beyond body temperature bound threshold value, single-chip microcontroller 1 controls warning circuit 9 and sends out Audible ringing signal out reminds user.

In conclusion the utility model can not only detect pulse and body temperature simultaneously, arteries and veins is shown by liquid crystal display circuit 8 It fights and body temperature, additionally it is possible to when pulse and body temperature exceed pre-set threshold range, make a sound alarm signal, function is complete It is standby, it is easy to use.

The above is only the preferred embodiment of the utility model, not imposes any restrictions to the utility model, all According to any simple modification to the above embodiments of the utility model technical spirit, change and equivalent structural changes, still Belong in the protection scope of technical solutions of the utility model.

Claims (10)

1. a kind of pulse and temperature monitor, it is characterised in that: including single-chip microcontroller (1) and be each electricity consumption module for power supply in detector Power circuit (2), and the crystal oscillating circuit (3) and reset circuit (4) that connect with single-chip microcontroller (1)；The single-chip microcontroller (1) it is defeated Enter to be terminated with key circuit (5), pulse detection circuit (6) and temperature check circuit (7), the pulse detection circuit (6) includes The infrared transmitting tube (6-1) and infrared receiving tube (6-2) for being used to detect finger pulse for being separately positioned on finger two sides, and The first signal amplification sample circuit (6-3) being connect with infrared receiving tube (6-2) and the first signal amplification sample circuit (6-3) The filter circuit (6-4) of connection and the sinusoidal signal connecting with filter circuit (6-4) turn square-wave signal circuit (6-5), it is described just The output end that string signal turns square-wave signal circuit (6-5) is connect with the input terminal of single-chip microcontroller (1)；The temperature check circuit (7) Including sequentially connected PT100 temperature sensor (7-1), second signal amplification sample circuit (7-2) and A/D conversion circuit (7- 3), the output end of the A/D conversion circuit (7-3) is connect with the input terminal of single-chip microcontroller (1)；The output end of the single-chip microcontroller (1) It is connected to liquid crystal display circuit (8) and warning circuit (9).

2. a kind of pulse described in accordance with the claim 1 and temperature monitor, it is characterised in that: the single-chip microcontroller (1) includes single Piece machine STC89C52, the crystal oscillating circuit (3) include crystal oscillator Y1, nonpolarity capacitor C5 and nonpolar capacitor C6, the crystal oscillator Y1 One end and one end of nonpolar capacitor C5 connect with the 18th pin of single-chip microcontroller STC89C52, the other end of the crystal oscillator Y1 It is connect with the 19th pin of single-chip microcontroller STC89C52 with one end of nonpolar capacitor C6, the other end of the nonpolarity capacitor C5 It is grounded with the other end of nonpolar capacitor C6；The reset circuit (4) includes reset key RESET, resistance R12 and polarity electricity Hold C4, the cathode of one end of the reset key RESET, one end of resistance R12 and polar capacitor C4 is and single-chip microcontroller The 9th pin of STC89C52 connects, and the anode of the other end of the reset key RESET and polar capacitor C4 are and power circuit (2)+5V voltage output end connection, the other end ground connection of the resistance R12.

3. a kind of pulse and temperature monitor according to claim 2, it is characterised in that: the key circuit (5) includes Key S1, key S2 and key S3, one end of the key S1 are connect with the 15th pin of single-chip microcontroller STC89C52, the key The other end of S1 is grounded by resistance R13；One end of the key S2 is connect with the 16th pin of single-chip microcontroller STC89C52, described The other end of key S2 is grounded by resistance R14；One end of the key S3 is connect with the 17th pin of single-chip microcontroller STC89C52, The other end of the key S3 is grounded by resistance R15.

4. a kind of pulse and temperature monitor according to claim 2, it is characterised in that: the infrared transmitting tube (6-1) Anode for infrared transmitting tube D1, the infrared transmitting tube D1 is connected by resistance R1 and the+5V voltage output end of power circuit (2) It connects, the minus earth of the infrared transmitting tube D1；The infrared receiving tube (6-2) is infrared receiving tube D2, the infrared receiver The cathode of the plus earth of pipe D2, the infrared receiving tube D2 is connected by resistance R2 and the+5V voltage output end of power circuit (2) It connects, concatenated polar capacitor C1 and resistance R3 is parallel between the anode and cathode of the infrared receiving tube D2；First letter Number amplification sample circuit (6-3) includes the of amplifier chip LM358 and slide rheostat RW1, the amplifier chip LM358 8 pins are connect with+5V the voltage output end of power circuit (2), the 4th pin ground connection of the amplifier chip LM358, described to put The 3rd pin of big device chip LM358 is connect with the connecting pin of polar capacitor C1 and resistance R3, the amplifier chip LM358's 2nd pin is connect with the sliding end of slide rheostat RW1 and a fixing end, and another of the slide rheostat RW1 is fixed End ground connection, is connected to resistance R4, the both ends of the resistance R4 are simultaneously between the 2nd pin and the 1st pin of the amplifier chip LM358 It is associated with nonpolar capacitor C2；The 5th pin of the amplifier chip LM358 passes through nonpolarity capacitor C3 and amplifier chip The 1st pin of LM358 connects, and the 6th pin of the amplifier chip LM358 passes through resistance R6 and the+5V of power circuit (2) electricity Output end connection is pressed, and is grounded by resistance R5, the 7th pin of the amplifier chip LM358 is the amplification sampling of the first signal The output end FD0UT of circuit (6-3), and be grounded by resistance R7.

5. a kind of pulse and temperature monitor according to claim 4, it is characterised in that: filter circuit (6-4) packet The one end and the first signal for including resistance R18, resistance R19, nonpolarity capacitor C7 and nonpolar capacitor C8, the resistance R18 are amplified The output end FD0UT connection of sample circuit (6-3), the other end of the resistance R18 is connect with one end of resistance R19, and is passed through Nonpolar capacitor C7 ground connection, the other end of the resistance R19 are the output end of filter circuit (6-4) and pass through nonpolar capacitor C8 Ground connection.

6. according to a kind of pulse and temperature monitor described in claim 2 or 5, it is characterised in that: the sinusoidal signal turns side Wave signal circuit (6-5) includes comparator chip LM393, the 8th pin of the comparator chip LM393 and power circuit (2) + 5V voltage output end connection, the comparator chip LM393 the 4th pin ground connection, the 1st of the comparator chip LM393 the Pin is connect by nonpolarity capacitor C9 with the output end of filter circuit (6-4), the 2nd pin of the comparator chip LM393 It is connect, and is grounded by resistance R20, the comparator chip with the+5V voltage output end of power circuit (2) by resistance R21 The 1st pin of LM393 is grounded by resistance R22, and the 1st pin of the comparator chip LM393 is that sinusoidal signal turns square wave letter It the output end of number circuit (6-5) and is connect with the 13rd pin of single-chip microcontroller STC89C52.

7. a kind of pulse and temperature monitor according to claim 2, it is characterised in that: the PT100 temperature sensor 1st pin of (7-1) is grounded by concatenated resistance R8 and resistance R9, the 2nd pin of the PT100 temperature sensor (7-1) It is grounded by resistance R10；Second signal amplification sample circuit (7-2) includes amplifier chip INA128 and slide rheostat RW2, the 1st pin of the amplifier chip INA128 is connect with a fixing end and sliding end of slide rheostat RW2, described The 8th pin of amplifier chip INA128 is connect with another fixing end of slide rheostat RW2, the amplifier chip The 2nd pin of INA128 is connect with the 2nd pin of PT100 temperature sensor (7-1), and the 3rd of the amplifier chip INA128 the Pin is connect with the connecting pin of resistance R8 and resistance R9, the 7th pin and power circuit (2) of the amplifier chip INA128 The connection of+12V voltage output end, the 4th pin of the amplifier chip INA128 and the -12V voltage output end of power circuit (2) Connection, the 5th pin ground connection of the amplifier chip INA128, the 6th pin of the amplifier chip INA128 are the second letter The output end of number amplification sample circuit (7-2).

8. according to a kind of pulse and temperature monitor described in claim 2 or 7, it is characterised in that: the A/D conversion circuit (7-3) includes A/D conversion chip ADC0809, and the 6th pin and the 22nd pin of the A/D conversion chip ADC0809 is and monolithic The 21st pin of machine STC89C52 connects, and the of the 7th pin of the A/D conversion chip ADC0809 and single-chip microcontroller STC89C52 The connection of 22 pins, the 8th pin of the A/D conversion chip ADC0809 is connect with the 4th pin of single-chip microcontroller STC89C52, described The 9th pin of A/D conversion chip ADC0809 is connect with the 23rd pin of single-chip microcontroller STC89C52, the A/D conversion chip The 10th pin of ADC0809 is connect with the 24th pin of single-chip microcontroller STC89C52, and the 11st of the A/D conversion chip ADC0809 the Pin and the 12nd pin are connect with+5V the voltage output end of power circuit (2), and the 13rd of the A/D conversion chip ADC0809 the Pin, the 16th pin, the 23rd pin, the 24th pin and the 25th pin are grounded, and the 14th of the A/D conversion chip ADC0809 the Pin is connect with the 2nd pin of single-chip microcontroller STC89C52, the 15th pin and single-chip microcontroller of the A/D conversion chip ADC0809 The 3rd pin of STC89C52 connects, and the 17th pin of the A/D conversion chip ADC0809 draws with the 1st of single-chip microcontroller STC89C52 Foot connection, the 18th pin of the A/D conversion chip ADC0809 are connect with the 5th pin of single-chip microcontroller STC89C52, the A/D The 19th pin of conversion chip ADC0809 is connect with the 6th pin of single-chip microcontroller STC89C52, the A/D conversion chip ADC0809 The 20th pin connect with the 7th pin of single-chip microcontroller STC89C52, the 21st pin and list of the A/D conversion chip ADC0809 The 8th pin of piece machine STC89C52 connects, and the 26th pin and the second signal amplification of the A/D conversion chip ADC0809 samples The output end of circuit (7-2) connects.

9. a kind of pulse and temperature monitor according to claim 2, it is characterised in that: the liquid crystal display circuit (8) Including liquid crystal display LCD1602, slide rheostat RW3 and triode Q2, the 1st pin of the liquid crystal display LCD1602 Ground connection, the 2nd pin and the 15th pin of the liquid crystal display LCD1602 connect with+5V the voltage output end of power circuit (2) It connects, the 3rd pin of the liquid crystal display LCD1602 is connect with the sliding end of slide rheostat RW3, the slide rheostat A fixing end of RW3 is connect with+5V the voltage output end of power circuit (2), and another of the slide rheostat RW3 is fixed End ground connection, the 4th~6 pin of the liquid crystal display LCD1602 is corresponding in turn to be drawn with the 25th~27 of single-chip microcontroller STC89C52 Foot connection, the 7th~14 pin of the liquid crystal display LCD1602 is corresponding in turn to be drawn with the 39th~32 of single-chip microcontroller STC89C52 Foot connection, the 16th pin of the liquid crystal display LCD1602 are connect with the emitter of triode Q2, the collection of the triode Q2 The base stage of electrode ground connection, the triode Q2 is connect by resistance R11 with the 28th pin of single-chip microcontroller STC89C52.

10. a kind of pulse and temperature monitor according to claim 2, it is characterised in that: the warning circuit (9) includes The base stage of triode Q1 and buzzer BUZZER, the triode Q1 are drawn by resistance R16 with the 10th of single-chip microcontroller STC89C52 Foot connection, the emitter of the grounded collector of the triode Q1, the triode Q1 are connect with the cathode of buzzer BUZZER, The anode of the buzzer BUZZER is connect by resistance R17 with the+5V voltage output end of power circuit (2).