CN201631187U

CN201631187U - High-sensitivity monitoring alarm for heart disease

Info

Publication number: CN201631187U
Application number: CN2010201664416U
Authority: CN
Inventors: 寇玉民; 赵飞
Original assignee: Beijing Union University
Current assignee: Beijing Union University
Priority date: 2010-04-22
Filing date: 2010-04-22
Publication date: 2010-11-17
Anticipated expiration: 2020-04-22

Abstract

The utility model relates to a medical monitoring alarm device, in particular to a high-sensitivity monitoring alarm for the heart disease, comprising a pulse-detecting circuit, a monostable trigger circuit, an alarm circuit and a sound circuit, wherein the pulse-detecting circuit consists of a probe MIC, a resistor R1 and a capacitor C1; the monostable trigger circuit consists of a triode T1, a trigger IC1, a resistor R2 and capacitors C2 and C3; the alarm circuit consists of resistors R7 and R8, a button switch S2, a one-way silicon controlled rectifier SCR, a light-emitting diode LED and a resistor R3; the sound circuit consists of a four-sound analogue integrated circuit IC2, a triode T2, resistor R4, R5 and R6 and a speaker YD; the probe MIC consists of an electret condenser microphone and a stethoscope head which is provided with a section of rubber hose; and the electret condenser microphone is arranged in the rubber hose. The utility model has the advantages of high sensitivity, simple structure, easy carrying and low cost.

Description

High sensitivity heart disease monitoring alarm

Technical field

This utility model is a kind of medical monitoring alarm device, particularly a kind of high sensitivity heart disease monitoring alarm.

Background technology

Heart disease is having a strong impact on people's life and healthy, and a lot of people are in heart attack unconsciously, and are dead to such an extent as to all rescue measures proved ineffectual.The heart disease monitoring alarm is that giving a warning has just appearred uneven or stolen the stopping time in the heart rate the people, reminds the user heart problem to occur, should have a rest immediately or seek medical advice, and prevents trouble before it happens.Existing heart disease monitoring alarm, sensitivity is low, complex structure, inconvenience is carried, and the cost height is unsuitable for producing in enormous quantities and popularizing.

Summary of the invention

The purpose of this utility model is in order to overcome the low baroque defective of existing heart disease monitoring alarm sensitivity, invents a kind ofly can prevent the interferential high sensitivity heart disease of external sound monitoring alarm.

The purpose of this utility model realizes as follows: described high sensitivity heart disease monitoring alarm comprises pulse-detecting circuit, single-shot trigger circuit, warning circuit and acoustics circuit;

Pulse-detecting circuit is made up of probe MIC, resistance R 1 and capacitor C 1, and probe MIC directly is connected with the two poles of the earth of power supply with resistance R 1 series connection back;

Single-shot trigger circuit is made up of audion T1, trigger IC1, resistance R 2, capacitor C 2, C3, the base stage of audion T1 is connected with 2 feet of trigger IC1, and be connected with the MIC that pops one's head in by capacitor C 1, the emitter stage of audion T1 is connected with 7,6 feet of trigger IC1, also be connected with 8,4 feet of resistance R 1 and trigger IC1 by resistance R 2, also be connected by 1 foot of capacitor C 2 with colelctor electrode and probe MIC and trigger IC1,1 foot of trigger IC1 is connected by capacitor C 3 with 5 feet;

Warning circuit is made up of resistance R 7, R8, press button S2, unidirectional controllable silicon S CR, LED and resistance R 3, resistance R 7, press button S2 and resistance R 8 series connection backs are connected with the two poles of the earth of power supply, unidirectional controllable silicon S CR, LED and resistance R 3 series connection backs are connected with the two poles of the earth of power supply, and the control utmost point of unidirectional controllable silicon S CR is connected with R8; The negative level of LED is connected with 3 feet of trigger IC1:

Acoustics circuit rings Analogous Integrated Electronic Circuits IC2, audion T2, resistance R 4, R5, R6 and speaker YD by the four tones of standard Chinese pronunciation and forms, 1 foot of IC2 is connected with speaker YD with 4 feet of trigger IC1 respectively by

resistance R

4,2 feet of IC2 are connected with 3 feet of IC1 and the negative level of LED respectively, 4 feet of IC2 are connected by resistance R 5 with 5 feet, 3 feet of IC2 are connected with the base stage of audion T2 by resistance R 6, the colelctor electrode of audion T2 is connected with speaker YD, and the emitter stage of audion T2 is connected with 1 foot of trigger IC1.

Described probe MIC is made up of condenser type Electret condenser microphone and stethoscope head, and stethoscope head is provided with one section sebific duct, and the condenser type Electret condenser microphone is located in the sebific duct.

The model of described trigger IC1 is NE555.

The model that the described four tones of standard Chinese pronunciation ring Analogous Integrated Electronic Circuits IC2 is CW9561.

Good effect of the present utility model is as follows: this utility model is highly sensitive, and is simple in structure, is easy to carry, with low cost.

Description of drawings

Fig. 1 is this utility model circuit theory diagrams

The specific embodiment

As shown in Figure 1, described high sensitivity heart disease monitoring alarm comprises pulse-detecting circuit, single-shot trigger circuit, warning circuit and acoustics circuit;

Warning circuit is made up of resistance R 7, R8, press button S2, unidirectional controllable silicon S CR, LED and resistance R 3, resistance R 7, press button S2 and resistance R 8 series connection backs are connected with the two poles of the earth of power supply, unidirectional controllable silicon S CR, LED and resistance R 3 series connection backs are connected with the two poles of the earth of power supply, and the control utmost point of unidirectional controllable silicon S CR is connected with R8; The negative level of LED is connected with 3 feet of trigger IC1;

resistance R

The model of described trigger IC1 is NE555.

During use, this utility model is carried at body, and be affixed on the heart place, by probe MIC, heart information can be delivered in the circuit, heart just can be reported to the police at once if problem is arranged, and reminds the patient to seek medical advice as early as possible, avoids accidents.

Work process of the present utility model is as follows: when the triggerless pulse is imported, because of trigger 2 feet be greater than

High level, its 3 foot output low level then, the discharge tube conducting of IC1 inside, capacitor C 2 terminal voltages go to zero; When negative pulse triggers input, the 2 foot electronegative potentials of IC1 are lower than

The IC1 upset, its 3 foot output high level, and the internal discharge pipe ends power supply V _CCCharge to C2 by R2, through one period charging interval, when capacitor C 2 terminal voltages greater than

The time, the upset of IC1 internal trigger, 3 feet are output low level again, at this moment, and the discharge tube conducting of IC1 inside, timing capacitor C2 discharges by discharge tube, and its terminal voltage is gone to zero, and circuit returns to original state again.As seen monostable circuit has only when trigger impulse makes the 2 foot current potentials of IC1 to be lower than The time, circuit just can be triggered, in case circuit is triggered, outfan will keep high level in the time of setting.During this period, even the trigger impulse input is arranged, output can not change yet.

Like this, when heart ticktack sound converts the signal of telecommunication to by probe, send a positive pulse adds to audion T1 through capacitor C 1 base stage, the T1 conducting, with timing capacitor C2 short circuit, approach zero because of the C2 terminal voltage this moment, 2 feet of IC1 are again low level, then its 3 foot output high level; After the pulse in the past, audion T1 ends, and capacitor C 2 is recharged by resistance R 2.Adjust the time constant t=R2 * C2 of monostable circuit, guarantee the pulse signal frequency (heartbeat number of times) that is monitored under normal circumstances, the charging voltage on the capacitor C 2 does not reach 6, the 7 foot triggering levels of IC1

Then 3 feet of IC1 remain high level, and LED does not work, and acoustics circuit IC2 is sounding not.When the pulse signal that is monitored undesired, as heart stop steathily suddenly or jumping frequency rate slow excessively, then the terminal voltage of capacitor C 2 two input pulses at interval in because the interval growth reaches

The time, the 3 foot output low levels of IC1 then, LED is lighted, IC2 work, buzzer YD sounding is reminded and is worn the human heart bradycardia or stop steathily, should take medicine immediately or goes to hospital to seek medical advice, and in time rescue is handled.After input pulse signal frequency (heartbeat frequency) was recovered normally, 3 feet of IC1 became high level again, and LED extinguishes, and YD stops sounding.

Adjustment method of the present utility model is as follows: during debugging, mainly be the resistance of adjusting R2, change the time constant of its single-shot trigger circuit.Concrete way is: survey earlier and will wear human heart jumping frequency rate under normal circumstances, should survey several times more, get its minimum jumping frequency rate, flick probe MIC with finger then, simulation heartbeat frequency, LED should not work, and speaker YD is sounding not.Then, the frequency of flicking probe MIC slows down, and makes it to be lower than normal palmic rate, transfers potentiometer R2 simultaneously, its LED is lighted, speaker YD sounding.And then with normal frequency flick the probe MIC, LED should extinguish, speaker YD should stop sounding.When normal frequency, stop the bullet MIC that once pops one's head in, LED should be lighted, and speaker YD answers sounding; Flick frequency retrieval just often, LED extinguishes again, and speaker YD stops sounding thereupon.Careful so repeatedly adjustment the, and then the MIC that will pop one's head in is placed on cardia and finely tuned is until to bradycardia or till the stopping time sends sound and light alarm immediately steathily.

Must vary with each individual careful the adjustment during adjustment.

Claims

1. a high sensitivity heart disease monitoring alarm comprises pulse-detecting circuit, single-shot trigger circuit, warning circuit and acoustics circuit; It is characterized in that:

Acoustics circuit rings Analogous Integrated Electronic Circuits IC2, audion T2, resistance R 4, R5, R6 and speaker YD by the four tones of standard Chinese pronunciation and forms, 1 foot of IC2 is connected with speaker YD with 4 feet of trigger IC1 respectively by resistance R 4,2 feet of IC2 are connected with 3 feet of IC1 and the negative level of LED respectively, 4 feet of IC2 are connected by resistance R 5 with 5 feet, 3 feet of IC2 are connected with the base stage of audion T2 by resistance R 6, the colelctor electrode of audion T2 is connected with speaker YD, and the emitter stage of audion T2 is connected with 1 foot of trigger IC1.

2. high sensitivity heart disease monitoring alarm according to claim 1 is characterized in that: described probe MIC is made up of condenser type Electret condenser microphone and stethoscope head, and stethoscope head is provided with one section sebific duct, and the condenser type Electret condenser microphone is located in the sebific duct.

3. high sensitivity heart disease monitoring alarm according to claim 1 is characterized in that: the model of described trigger IC1 is NE555.

4. high sensitivity heart disease monitoring alarm according to claim 1 is characterized in that: the model that the described four tones of standard Chinese pronunciation ring Analogous Integrated Electronic Circuits IC2 is CW9561.