CN2309795Y

CN2309795Y - Self-test type electronic desk type sphygmomanometer

Info

Publication number: CN2309795Y
Application number: CN 97247688
Authority: CN
Inventors: 陶亦军; 曾显荣
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-11-05
Filing date: 1997-11-05
Publication date: 1999-03-10
Anticipated expiration: 2007-11-05

Abstract

The utility model belongs to an electronic desk type sphygmomanometer and is composed of a desk type sphygmomanometer, a Korotkoff's sound sensor and a detecting indicator. The Korotkoff's sound sensor, the impedance converter circuit of the detecting indicator, a Korotkoff's sound filter circuit, a strobe pulse generating circuit and an indicating circuit are orderly connected and the strobe pulse generating circuit is electrically connected with the operational amplifier of the Korotkoff's sound filter circuit. The utility model has the advantages of accurate and stable reading of measuring blood pressure, high sensitivity, strong anti-interference ability and convenient self-measurement of the blood pressure and after a microcontroller is matched, the pulse can be measured. The utility model can also mark the relative standard blood pressure value area with colors on a scale brand.

Description

The formula of testing oneself electronics desk model sphygmomanometer

This utility model relates to a kind of electronics desk model sphygmomanometer.

General desk model sphygmomanometer utilizes stethoscope to remove to detect the Ke Shi sound and measures blood pressure.Its principle is to remove to oppress brachial artery with the gasbag the blowing pressure in the arm band, stops blood flow to pass through, when gasbag pressure drops to when being lower than systolic pressure, blood flow just begin by, then because of blood pressure drops descends faster than the air bag internal gas pressure, brachial artery is closed once more, and this process has just produced the Ke Shi sound.When air pressure was lower than diastolic pressure, blood flow Channel Group in blood vessel was without hindrance, and the Ke Shi sound disappears.Therefore, the height of mercury when hearing the Ke Shi sound first is systolic pressure, and the height of mercury that the Ke Shi sound has just disappeared constantly is diastolic pressure.Though common desk model sphygmomanometer is measured accurately, must go to listen the Ke Shi sound by the human stethoscope, just can measure blood pressure, this just is difficult to realize oneself measuring the blood pressure of oneself, the layman can not use stethoscope yet simultaneously.For this reason, occur digital sphygmomanometer on the market in a large number, it goes out Ke Shi sound and corresponding therewith force value with sensor, show systolic pressure and diastolic pressure with numeral, though it is easy to operate, owing to the reason of pick off, accuracy is relatively poor relatively, necessary periodic calibration, and cost an arm and a leg.As its improvement, Chinese patent application 94241860.3 has proposed the desk-top mercurial sphygmomanometer of a kind of electronics.It has the characteristics highly sensitive, that capacity of resisting disturbance is stronger.Kept the stable advantage of original desk-top mercurial sphygmomanometer accuracy of reading, also had characteristics easy to use simultaneously, do not needed stethoscope to contrast the numerical value that the mercury column height is read systolic pressure and diastolic pressure again by electronic displays prompts displayed signal.But its hold-off time and amplification are implicative of each other, and increase amplification and then need prolong release time, will cause the interference free performance variation like this.Have again in its used circuit field effect transistor is arranged, and the required running voltage of field effect transistor is 9 volts, so can't use same working power with microcontroller.

But the purpose of this utility model provides, and a kind of accuracy of reading is stable, highly sensitive, capacity of resisting disturbance strong and the formula of the testing oneself electronics desk model sphygmomanometer of adapted microcontroller.

The technical scheme that realizes this utility model purpose is (referring to Fig. 1 and Fig. 2), originally the formula of testing oneself electronics desk model sphygmomanometer has desk model sphygmomanometer (1), korotkoff sound sensor (2), detect indicator (3), korotkoff sound sensor (2) is located among the arm band (12), detecting indicator (3) is located on the desk-top mercurial sphygmomanometer (1), detect indicator (3) and have impedance inverter circuit (31), Ke Shi sound filter circuit (32) and indicating circuit (34), the output of korotkoff sound sensor (2) connects the impedance inverter circuit (31) that detects indicator (3), the output of impedance inverter circuit (31) connects Ke Shi sound filter circuit (32), it is characterized in that, detect indicator (3) and also have gate pulse generation circuit (33), pulse-generating circuit (33) is led in the output selecting of Ke Shi sound filter circuit (32), the output that gate pulse produces circuit (33) divides two-way, one the tunnel connects indicating circuit (34), and another road connects the operational amplifier of Ke Shi sound filter circuit (32).

Referring to Fig. 3, above-mentioned impedance inverter circuit (31) has resistance R 1, R2, R3 and operational amplifier U1:A, the end of R1 is the input of the impedance inverter circuit (31) that links to each other with the output of korotkoff sound sensor (1), the other end of R1 links to each other with the end of the in-phase end of U1:A and R2, the other end of R2 is a power end, the end of R3 links to each other with the end of oppisite phase of U1:A, the other end links to each other with the outfan of U1:A, and the outfan of U1:A also is the outfan of impedance inverter circuit (31).Ke Shi sound filter circuit (32) has resistance R 4, R5, R6, R7, R8, capacitor C 1, C2, C3, potentiometer W and operational amplifier U1:B, the end of R4 is the input of Ke Shi sound filter circuit (32), the other end of R4 and R5, C1 and C2 link to each other, the other end ground connection of R5, end of oppisite phase and the R7 of another termination U1:B of C2, the other end of another termination C1 of R7 and the center-side of potentiometer W, the end of R6 is a power end, the other end of R6 links to each other with the in-phase end of U1:B, the outfan of U1:B is that outfan and this outfan of Ke Shi sound filter circuit (32) links to each other with the end of R8, and the other end of R8 links to each other with the end of potentiometer W, the other end of potentiometer W links to each other with the end of C3, the other end ground connection of C3.Gate pulse produces circuit (33) and has resistance R 9, R10, R11, R12, R13, R14, R15, capacitor C 4, C5, diode D1 and operational amplifier U1:C, U1:D, one end of resistance R 9 is the input that gate pulse produces circuit (33), the other end of R9 links to each other with the end of the end of oppisite phase of U1:C and R10, the end of R11 is a power end, the other end of R1 1 links to each other with the in-phase end of U1:C, the outfan of U1:C links to each other with the end of C4, the other end of C4 links to each other with the end of R12, the other end of R12 links to each other with the end of the end of oppisite phase of U1:D and R13, the other end of R13 is a power end, the end of R14 is for being power end, the other end of R14 links to each other with the in-phase end of U1:D, the outfan of U1:D links to each other with the other end of the anode of D1 and R10, and this holds the outfan that links to each other with indicating circuit (34) into gate pulse generation circuit (33), the negative electrode of D1 links to each other with R15, and the other end of R15 links to each other the other end ground connection of C5 with the in-phase end of the U1:B of C5 and Ke Shi sound filter circuit (32).

The monostable time circuit that above-mentioned R13, R12 and C4 constitute, its time constant is 0.2～0.4 second.

Still referring to Fig. 3, above-mentioned indicating circuit (34) has resistance R 19, audion BG2, LED light emitting diode (34-1) and active news Chinese percussion instrument B, the end of R19 is the input end of indicating circuit (34), the other end of R19 links to each other with the base stage of BG2, the end of news Chinese percussion instrument B is a power end, and the other end of news Chinese percussion instrument B links to each other with the anode of light emitting diode, the negative electrode of light emitting diode connects the grounded emitter of the colelctor electrode of BG2, BG2.

Originally the formula of testing oneself electronics desk model sphygmomanometer also has low supply voltage testing circuit (35), low supply voltage testing circuit (35) has resistance R 16, R17, R18, audion BG1 and diode D2, the end of R16 is a power end, the other end of R16 links to each other with the base stage of BG1 and R17, the other end ground connection of R17, the end of R18 is a power end, the colelctor electrode of another termination BG1 of R18 and the anode of D2, the grounded emitter of BG1, the other end of D2 links to each other with the base stage of the BG2 of indicating circuit (34).

Referring to Fig. 4, indicating circuit (34) has microcontroller, crystal oscillating circuit, reset circuit, LCD display, resistance R 19 and buzzer FM, crystal oscillating circuit links to each other with the crystal oscillator end of microcontroller, reset circuit links to each other with the RESET input of microcontroller, the end of R19 is the input of indicating circuit (34), the other end of R19 links to each other with the outer interruptive port of microcontroller, and the microcontroller delivery outlet links to each other with LCD display and FM.

Above-mentioned indicating circuit (34) also has resistance R 21, the end of R21 links to each other with the input port of microcontroller, originally the formula of testing oneself electronics desk model sphygmomanometer also has low supply voltage testing circuit (35), low supply voltage testing circuit (35) has resistance R 16, R17, R18, audion BG1 and diode D2, the end of R16 is a power end, the other end of R16 links to each other with the base stage of BG1 and R17, the other end ground connection of R17, the end of R18 is a power end, the colelctor electrode of another termination BG1 of R18 and the anode of D2, the grounded emitter of BG1, the other end of D2 links to each other with the other end of the R21 of indicating circuit (34).

Referring to Fig. 5, the scale board (11) of above-mentioned desk model sphygmomanometer (1) is provided with color mark, red expression hypertension district, yellow expression borderline hypertension district, green expression normal arterial pressure district, transparent expression hypotension district.

The utlity model has positive effect: (1) this utility model not only kept the accuracy of reading of Chinese patent application 94241860.3 stable, without stethoscope promptly can test oneself blood pressure, highly sensitive advantage, and capacity of resisting disturbance is greatly improved by the time constant of selecting appropriate gate pulse.(2) impedance inverter circuit of detection indicator of the present utility model is a main devices with promise (NOTON) type integrated transporting discharging that pauses, it adapts to the operating voltage range broad, so entire circuit can adopt 6 volts working power, thereby when being equipped with microcontroller, can use same working power.(3) this utility model is equipped with after the microcontroller, also can show pulse numerical value in display.When using the relevant standard blood pressure values of color mark regional on the scale board, can reflect clearly whether institute's measuring blood pressure is normal.

Fig. 1 is a kind of structural representation of the present utility model.

Fig. 2 is a kind of circuit block diagram of the present utility model.

Fig. 3 is a kind of electrical schematic diagram of the present utility model.

Fig. 4 is an another kind of electrical schematic diagram of the present utility model.

Fig. 5 is the sketch map of the scale of desk model sphygmomanometer of the present utility model.

Main program flow chart when Fig. 6 uses microcontroller to measure pulse for this utility model.

Fig. 7 is the outer interrupt service routine flow chart that is used with mastery routine.

Fig. 8 is the intervalometer interrupt service routine flow chart that is used with mastery routine.

Below in conjunction with embodiment and accompanying drawing this utility model is further described.

Embodiment 1,

See Fig. 1, korotkoff sound sensor (2) is circular piezoceramic transducer, this pick off (2) is sewn among the arm band (12), detecting indicator (3) is fixed on the shell (18), LED light emitting diode (34-1) is located on the scale board (11), and piezoceramic transducer (2) links to each other with the input that detects indicator (3) by lead (6).

See Fig. 5, it is the color mark that is in which kind of zone that one side of the close mercury tube of the left scale of the scale board (11) of desk model sphygmomanometer (1) is provided with the expression systolic pressure, it is the color mark that is in which kind of zone that one side of the close mercury tube of right scale is provided with the expression diastolic pressure, red expression hypertension district, yellow expression borderline hypertension district, green expression normal arterial pressure district, transparent expression hypotension district.

See Fig. 2 and Fig. 3, the electrical connection that detects the concrete element of indicator (3) is provided by Fig. 3, wherein U1 is the promise integrated four high guaily unit of (NOTON) type that pauses, model is LM3301, the capacitance of capacitor C 4 is 0.15 μ F, the resistance of resistance R 12 is 470K Ω, and the resistance of R13 is 1.5M Ω, and active news Chinese percussion instrument B is the news Chinese percussion instrument that inside has agitator.

When surveying human blood-pressure, holding arms band (12) is tied up on upper arm, and korotkoff sound sensor (2) is positioned on the brachial artery, by extruding ball (14), make the rubber bag inflation in the arm band (12), mercury column in the mercury tube (15) is risen, indicating value according to scale (11), when post is high when surpassing the common systolic pressure 20～30mmHg of measured, begin venting by air valve (13), when the pressure in the rubber bag equals systolic pressure, korotkoff sound sensor (2) receives by blood flow in the brachial artery and produces the Ke Shi tone signal of sending, and convert corresponding voltage signal to, this signal is transported to impedance inverter circuit (31), transports to Ke Shi sound filter circuit (32) after impedance inverter circuit (31) is isolated, and the mid frequency design of this grade active band-pass filter is at 33HZ.The frequency of the signal of telecommunication of generation on pick off (31) is consistent because of this mid frequency and Ke Shi sound, thus allow the Ke Shi sound to pass through, and the signal of other frequency can not pass through.Signal by Ke Shi sound wave filter (32) makes gate pulse produce circuit (33) and is triggered, and making width of U1:D output is 0.2 second positive gate pulse.This gate pulse has two effects, and the one, make the Ke Shi sound obtain positive feedback in the phase at gating, at gating interfering signal is suppressed; Another effect is will to transport to indicating circuit (34) at gate pulse and generation acousto-optic index signal.The high reading of mercury column when news Chinese percussion instrument B just sound has taken place is systolic pressure.Along with the gas in the interior rubber bag of arm band (12) is emitted gradually, its pressure is during less than diastolic pressure, because of the Ke Shi sound in the brachial artery disappears so pick off (2) no-voltage signal produces, and at this moment the electronic acoustooptic indicator quits work, the reading that the mercury column when then acousto-optic has just disappeared is high is a diastolic pressure.

During this utility model start, if supply voltage is lower than predetermined voltage, then sampling voltage can not make the BG1 of low supply voltage testing circuit (35) keep saturation, so the BG1 collector voltage raises, make the D2 conducting, cause indicating circuit (34) work, the LED lumination of light emitting diode, news Chinese percussion instrument B sounding, alarm supply voltage is lower than predetermined value.Can prevent effectively that crossing the low circuit working point that makes because of supply voltage is offset the inaccurate problem of blood pressure measurement that causes.

Embodiment 2,

See Fig. 4, all the other are with embodiment 1, difference is, the critical piece of indicating circuit (34) is that microcontroller U2, its model are 89C2051 (also available 89C1051 etc.), microphone device is buzzer FM, 7 feet of another termination microcontroller of output connecting resistance R21, the R21 of low supply voltage detection circuit (35), the outer interruptive port of a termination microcontroller of resistance R 19.

By FM the numerical value of systolic pressure and diastolic pressure is indicated, shown by the numerical value of display to pulse, concrete work process is as follows:

See Fig. 6, when pressing on and off switch K, then to microcontroller U2 electrification reset, initialization, mastery routine detects the height of level and judges whether supply voltage is in low-voltage state from 7 feet of U2, if high level then is judged as low-voltage, then 12 foot output audio signals from U2 make the FM sounding alarm; If low level then determines whether 12 foot output audio signals at U2 according to outer interrupt routine whether sound Warning Mark in service.If sound Warning Mark, then at the 12 foot output audio signals of U2, operation judges whether the signal of 6 feet of U2 is programs of interfering signal then.If noiseless Warning Mark, then directly operation judges whether the signal of 6 feet is programs of interfering signal.If continuous high level and the repetition period signal in a certain predetermined range of error that detects for six times then thinks the pulse signal and produce the cycle count sign, and think that all the other high level are interfering signal.If think the block whether the pulse signal then moves operation token.If there is operation token then to enter the program of asking 5 cycle meansigma methodss, then meansigma methods is got inverse, multiply by 60 pulse number of times that obtain per minute again, these data are temporary in internal memory, and program is returned.If no operation token then moves the block of judging whether measurement finishes, determines according to waiting for whether enumerator overflows this moment.Do not judge that then measurement finishes if do not overflow, program is returned.Judge that then measurement finishes if overflow, shutoff, rejection external signal will be interrupted and regularly be interrupted to program outward.Send display to show temporary pulse data again, show 10 seconds altogether.Return after the measurement initial condition of resetting then.

See Fig. 7; 6 feet of program U2 are set to outer interruptive port; and be interrupt signal with the rising edge; when 6 feet of U2 receive when gate pulse produces the positive pulse of circuit (33) output; then start outer 0 the interrupt routine of interrupting, earlier the relevant depositor at scene and the data in arithmetical unit are pushed away people's storehouse and protect, the T0 intervalometer of performing fighting then picks up counting; Warning Mark is set, and goes out sound signal from 12 human hair combing wastes of U2 by this Warning Mark control.Program moves to and judges the block that has or not the cycle count sign then.If the no periodic count flag is then moved the on-the-spot program of recovering, the protected data that also is about in the storehouse is taken out, and interrupt routine finishes.If the cycle count sign is arranged, then according to whether existing 5 cycles determine that counting still is computing.If existing 5 cycles then are provided with operation token and use for mastery routine, cancel the cycle count sign simultaneously; Operate if then carry out cycle count, use when depositing the data in the cycle rate counter in depositor supply and demand cycle meansigma methods, enter the state of waiting for interrupt signal after on-the-spot the recovery less than 5 cycles.

See Fig. 8, when outer interruption 0 interrupt routine moves to out the T0 intervalometer, start intervalometer T0 interrupt routine.Scene protection is carried out in the regularly circular flow of this interrupt routine earlier, the timing and open T0 and interrupt of resetting then.Whether the program operation has the block of cycle count sign, indicates that then cycle rate counter adds 1 if having, and behind the recovery scene, interrupts the exit from T0 and finishes, and waits for certain hour then, circular flow; If the no periodic count flag then adds 1 in waiting for enumerator, recover on-the-spot again, interrupt the exit from T0 and finish, wait for certain hour then, circular flow.

Claims

1, a kind of formula electronics desk model sphygmomanometer of testing oneself, has desk model sphygmomanometer (1), korotkoff sound sensor (2), detect indicator (3), korotkoff sound sensor (2) is located among the arm band (12), detecting indicator (3) is located on the desk-top mercurial sphygmomanometer (1), detect indicator (3) and have impedance inverter circuit (31), Ke Shi sound filter circuit (32) and indicating circuit (34), the output of korotkoff sound sensor (2) connects the impedance inverter circuit (31) that detects indicator (3), the output of impedance inverter circuit (31) connects Ke Shi sound filter circuit (32), it is characterized in that, detect indicator (3) and also have gate pulse generation circuit (33), pulse-generating circuit (33) is led in the output selecting of Ke Shi sound filter circuit (32), the output that gate pulse produces circuit (33) divides two-way, one the tunnel connects indicating circuit (34), and another road connects the operational amplifier of Ke Shi sound filter circuit (32).

2, the formula electronics desk model sphygmomanometer of testing oneself according to claim 1, it is characterized in that, impedance inverter circuit (31) has resistance R 1, R2, R3 and operational amplifier U1:A, the end of R1 is the input of the impedance inverter circuit (31) that links to each other with the output of korotkoff sound sensor (1), the other end of R1 links to each other with the end of the in-phase end of U1:A and R2, the other end of R2 is a power end, the end of R3 links to each other with the end of oppisite phase of U1:A, the other end links to each other with the outfan of U1:A, and the outfan of U1:A also is the outfan of impedance inverter circuit (31);

Ke Shi sound filter circuit (32) has resistance R 4, R5, R6, R7, R8, capacitor C 1, C2, C3, potentiometer W and operational amplifier U1:B, the end of R4 is the input of Ke Shi sound filter circuit (32), the other end of R4 and R5, C1 and C2 link to each other, the other end ground connection of R5, end of oppisite phase and the R7 of another termination U1:B of C2, the other end of another termination C1 of R7 and the center-side of potentiometer W, the end of R6 is a power end, the other end of R6 links to each other with the in-phase end of U1:B, the outfan of U1:B is that outfan and this outfan of Ke Shi sound filter circuit (32) links to each other with the end of R8, and the other end of R8 links to each other with the end of potentiometer W, the other end of potentiometer W links to each other with the end of C3, the other end ground connection of C3;

Gate pulse produces circuit (33) and has resistance R 9, R10, R11, R12, R13, R14, R15, capacitor C 4, C5, diode D1 and operational amplifier U1:C, U1:D, one end of resistance R 9 is the input that gate pulse produces circuit (33), the other end of R9 links to each other with the end of the end of oppisite phase of U1:C and R10, the end of R11 is a power end, the other end of R11 links to each other with the in-phase end of U1:C, the outfan of U1:C links to each other with the end of C4, the other end of C4 links to each other with the end of R12, the other end of R12 links to each other with the end of the end of oppisite phase of U1:D and R13, the other end of R13 is a power end, the end power end of R14, the other end of R14 links to each other with the in-phase end of U1:D, the outfan of U1:D links to each other with the other end of the anode of D1 and R10, and this holds the outfan that links to each other with indicating circuit (34) into gate pulse generation circuit (33), the negative electrode of D1 links to each other with R15, and the other end of R15 links to each other the other end ground connection of C5 with the in-phase end of the U1:B of C5 and Ke Shi sound filter circuit (32).

3, the formula electronics desk model sphygmomanometer of testing oneself according to claim 2 is characterized in that, the monostable time circuit that R13, R12 and C4 constitute, and its time constant is 0.2～0.4 second.

4, the formula electronics desk model sphygmomanometer of testing oneself according to claim 2, it is characterized in that, indicating circuit (34) has resistance R 19, audion BG2, LED light emitting diode (34-1) and active news Chinese percussion instrument B, the end of R19 is the input of indicating circuit (34), the other end of R19 links to each other with the base stage of BG2, the end of news Chinese percussion instrument B is a power end, and the other end of news Chinese percussion instrument B links to each other with the anode of light emitting diode, the negative electrode of light emitting diode connects the grounded emitter of the colelctor electrode of BG2, BG2.

5, the formula electronics desk model sphygmomanometer of testing oneself according to claim 4, it is characterized in that, originally the formula of testing oneself electronics desk model sphygmomanometer also has low supply voltage testing circuit (35), low supply voltage testing circuit (35) has resistance R 16, R17, R18, audion BG1 and diode D2, the end of R16 is a power end, the other end of R16 links to each other with the base stage of BG1 and R17, the other end ground connection of R17, the end of R18 is a power end, the colelctor electrode of another termination BG1 of R18 and the anode of D2, the grounded emitter of BG1, the other end of D2 links to each other with the base stage of the BG2 of indicating circuit (34).

6, the formula electronics desk model sphygmomanometer of testing oneself according to claim 2, it is characterized in that, indicating circuit (34) has microcontroller, crystal oscillating circuit, reset circuit, LCD display, resistance R 19 and buzzer FM, crystal oscillating circuit links to each other with the crystal oscillator end of microcontroller, reset circuit links to each other with the RESET input of microcontroller, the end of R19 is the input of indicating circuit (34), the other end of R19 links to each other with the outer interruptive port of microcontroller, and the microcontroller delivery outlet links to each other with LCD display and FM.

7, the formula electronics desk model sphygmomanometer of testing oneself according to claim 6, it is characterized in that, indicating circuit (34) also has resistance R 21, the end of R21 links to each other with the input port of microcontroller, originally the formula of testing oneself electronics desk model sphygmomanometer also has low supply voltage testing circuit (35), low supply voltage testing circuit (35) has resistance R 16, R17, R18, audion BG1 and diode D2, the end of R16 is a power end, the other end of R16 links to each other with the base stage of BG1 and R17, the other end ground connection of R17, the end of R18 is a power end, the colelctor electrode of another termination BG1 of R18 and the anode of D2, the grounded emitter of BG1, the other end of D2 links to each other with the other end of the R21 of indicating circuit (34).

8, according to the described formula electronics desk model sphygmomanometer of testing oneself of one of claim 1 to 7, it is characterized in that the scale board (11) of desk model sphygmomanometer (1) is provided with color mark, red expression hypertension district, yellow expression borderline hypertension district, green expression normal arterial pressure district, transparent expression hypotension district.