CN2043110U

CN2043110U - Automatic sounding and counting instrument for pulse

Info

Publication number: CN2043110U
Application number: CN 88214313
Authority: CN
Inventors: 叶占洪
Original assignee: Individual
Current assignee: Individual
Priority date: 1988-09-21
Filing date: 1988-09-21
Publication date: 1989-08-23

Abstract

Disclosed is an automatic sounding and counting instrument for pulse which is a medical apparatus suitable for feeling the pulse in traditional Chinese medical treatment. The automatic sounding and counting instrument for pulse converts a weak ripple of the pulse into an electric signal with a probe, and the sound of the ripple of pulse is impelled through a pre-amplifier and a power amplifier. The signal of the ripple of the impulse impels the switch circuit to work through a low pass filter, a shaping circuit, an interface circuit and a low frequency pulse amplifier, and the a counter is enabled to count the unit time under the control of a timer. The utility model enables a traditional Chinese doctor to judge the state of an illness according to the volume, speed of the sound and the times of the ripple of pulse without feeling the pulse with fingers, enhances the precision of feeling the pulse and thus is suitable for examining an illness in a hospital or a family.

Description

Automatic sounding and counting instrument for pulse

This utility model is a kind of automatic sounding calculating instrument of pulsation that is suitable for traditional Chinese medical science feeling the pulse usefulness, belongs to medical apparatus.

Since ancient times, one of main means of the tcm diagnosis state of an illness all are the pulsations that relies on three finger palpation patient's wrist, i.e. so-called " feeling the pulse ", and according to the dancing power of patient's pulsation, speed,

Experience is judged patient's the state of an illness, and the shortcoming that this feeling the pulse method exists is to be difficult for grasping, and particularly a lot of young doctors often cause the erroneous judgement to patient owing to lacking experience, influence therapeutic effect.

The purpose of this utility model is in order to overcome the shortcoming of above-mentioned finger feeling the pulse, the device that adopts electronic circuit to form becomes the situation of beating of pulsation into sound or waveform intuitively shows, writes down dancing number of times of unit interval simultaneously, for state of an illness diagnosis and pathological study analysis, to improve the correctness of feeling the pulse.

Technical solution of the present utility model is as probe with a highly sensitive Electret condenser microphone, the pulsation of contact human body wrist, faint pulsation beated become the signal of telecommunication, amplify through preamplifier, power amplifier, promote speaker and send the dancing sound of pulsation, perhaps take out signal and be input to recorder recording or slowed sweep oscilloscope and make the pulse waveform and observe and use by the speaker two ends.Pulsation signal from preamplifier is through 8～15 hertz of low pass filters simultaneously, filtering higher hamonic wave and spurious signal, through shaping circuit the pulse signal is become square wave again, come the pull switch circuit working through interface circuit, low-frequency pulse amplifier, under the control of intervalometer, make auto-counter carry out the counting of unit interval.

Below in conjunction with description of drawings embodiment of the present utility model:

Fig. 1 is a block diagram of the present utility model

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

Fig. 3 is a panel sketch map of the present utility model

Numbering 1 is a speaker among the figure, and 2 is timing key, and 3 is enumerator, and 4 is probe socket, and 5 are pulse signal leading-out terminal, and 6 is on and off switch.

This utility model is formed (as shown in Figure 1) by probe, preamplifier, power amplifier, speaker, 10 hertz of low pass filters, shaping circuit, interface circuit, low-frequency pulse amplifier, on-off circuit, intervalometer, enumerator and rectifying voltage regulator circuit.The structure chart that circuit of the present utility model connects as shown in Figure 2.Preamplifier, 10 hertz of low pass filters, shaping circuit and power amplifiers use a slice LM324 integrated package and part discrete component jointly, the LM324 integrated package has 4 groups of operational amplifiers, 1-14 goes out foot, terminal 11 ground connection wherein, terminal 4 connect power supply (+7V).Probe of the present utility model is a highly sensitive microphone, and the plug of its microphone cord is inserted on the panel jack (4), and probe contact human body wrist becomes the signal of telecommunication with the pulse situation, through capacitor C ₁Consumption is incorporated into preamplifier, and preamplifier is by resistance R ₄, R ₅, R ₆, R ₇With the input of LM324 integrated package be 12,13, outfan is that one group of operational amplifier of 14 constitutes.Through the pulse signal that preamplifier amplifies, a part is input to power amplifier (terminal 14 splicing ears 10) through lead-out terminal 14, and another part is input to 10 hertz of low pass filters through lead-out terminal 14, and (terminal 14 connects R ₁₀), power amplifier is by resistance R ₈, R ₉With the input terminal of LM324 integrated package be 10,9 and lead-out terminal be that one group of operational amplifier of 8 constitutes, the pulse signal that amplifies through power amplifier from lead-out terminal 8 through coupling capacitance C ₅The promotion speaker is sounded.The speaker two ends have lead-out wire to receive panel pulse signal output terminal A, B, and A, B terminal can receive recorder or slowed sweep oscilloscope is made pulse waveform observation usefulness.10 hertz of low pass filters are active filters, by capacitor C ₃, C ₄, resistance R ₁₀, R ₁₁, R ₁₂, R ₁₃With the input of LM324 integrated package be 2,3, outfan is that one group of operational amplifier of 1 constitutes, the pulse signal after 10 hertz of low pass filter filters out higher hamonic waves and spurious signal is input to the input terminal 6 of shaping circuit through lead-out terminal 1.Shaping circuit is the Si Mite shaping, by resistance R ₁₄, R ₁₅With the input of LM324 integrated package be 5,6, outfan is that one group of operational amplifier of 7 constitutes, and approaches square-wave pulse signal through the pulse signal of shaping, this pulse signal is through outfan 7, interface circuit D ₁Be input to the low-frequency pulse amplifier, promptly the shaping circuit outfan 7, connection interface circuit D ₁Anode, D ₁Negative electrode connect low-frequency pulse amplifier input terminal resistance R ₁₆The low-frequency pulse amplifier is by transistor BG ₁, BG ₂And resistance R ₁₆, R ₁₇, R ₁₈, R ₁₉Constituting, is secondary low-frequency pulse amplifier, through amplified pulse signal (6-7V) from BG ₂Colelctor electrode C output to on-off circuit D ₃Negative electrode.On-off circuit is by diode D ₂, D ₃And resistance R ₂₁Form D ₂With D ₃Form AND circuit, D ₂Negative electrode connect intervalometer, AND gate circuit " open " door control by intervalometer.D ₂, D ₃Anode connect the enumerator input.Intervalometer is by resistance R ₂₀, variable resistance W ₁, capacitor C ₆C ₇, timing key and integrated package NE555 constitute, NE555 has the sub-1-8 of the foot of going out, terminal 1 ground connection,

terminal

4,8 meets power supply+7V.As low-frequency pulse amplifier BG ₂The signal exported from terminal 3 of signal and the intervalometer of colelctor electrode C output when idiostatic, AND gate circuit is just opened, and enumerator is remembered once, by a timing key, promptly determine a unit interval, be generally one minute, intervalometer is from terminal 3 outputs one control current potential, only the pulse signal that comes in the unit interval in this unit interval, AND gate is just opened, enumerator is just counted, and once remembers once, and Lei Jia And shows in enumerator.Enumerator is one 838 electronic calculator, draws two lines from equals' key, goes into ground for one, and one connects AND gate circuit (as shown in Figure 2).Power circuit of the present utility model is made of diode bridge rectification, capacitance-resistance filter, mu balanced circuit, and its output voltage is+7V.R among Fig. 2 ₂, R ₃Form power supply bleeder circuit ， And and be associated in R ₃On capacitor C ₂It is filter capacitor.

The utility model has the advantages that because the device that has adopted electronic circuit to form, the pulsation situation of beating has been become sound by loudspeaker or waveform intuitively shows, the while register number of times that pulsation is beated in the unit interval, the doctor just needn't win the number of times of beating with finger feeling the pulse and rapid pulse like this, can be according to the power of loudspeaker sound, the number of times that the pulsation of the unit interval that the waveform sum counter of speed or demonstration shows is beated is judged the state of an illness, can improve like this correctness of feeling the pulse, special in the young doctor of lacking experience, understand slightly that generally the patient of arteries and veins reason also can be by the instrument OBD state of an illness. The utility model volume is little, makes simply, and cost is low, is suitable for the usefulness that hospital and family diagnose a disease.

Preferred embodiment of the utility model is: probe adopts to be put into the micro recorder microphone in gynemetrics cylindrical shape stethoscope the inside and consists of, and counter is with commercially available 838 electronic calculators. R₁＝R ₁₆＝1KΩ，R ₂＝R ₃＝R ₁₇＝3KΩ，R ₄＝R ₆＝R ₇＝R ₈＝R ₉＝R ₁₄＝R ₁₅＝10KΩ，R ₅＝510KΩ，R ₁₀＝R ₁₁＝470KΩ，R ₁₂＝1.3MΩ，R ₁₃＝2MΩ，R ₁₈＝15KΩ，R ₁₉＝51KΩ，R ₂₀＝R ₂₁＝100KΩ，W ₁The potentiometer of=120-470K Ω, D₁、D ₂、D ₃Use crystal diode 2CP, C₁＝C ₂＝C ₃=100 μ f electrochemical capacitors, C₃＝C ₄＝0.033μf，C ₆＝68μf，C＝0.01μf，BG ₁、BG ₂Use transistor 3DG₆, integrated package LM324 and NE555.

Claims

1, a kind of automatic sounding calculating instrument of pulsation that is suitable for traditional Chinese medical science feeling the pulse, rectifying voltage regulator is arranged, it is characterized in that constituting by probe, preamplifier, power amplifier, speaker, low pass filter, shaping circuit, interface circuit, low-frequency pulse amplifier, on-off circuit, intervalometer sum counter.

2, the automatic sounding calculating instrument of pulsation according to claim 1, it is characterized in that popping one's head in is that the microphone of a micro high sensitivity, the plug of microphone cord are plugged on the panel jack (4).

3, the automatic sounding calculating instrument of pulsation according to claim 1 is characterized in that low pass filter is by capacitor C ₃, C ₄, resistance R ₁₀, R ₁₁, R ₁₂8～15 hertz of low pass filters with one group of operational amplifier formation.