CN201727502U

CN201727502U - Digital mercury sphygmomanometer

Info

Publication number: CN201727502U
Application number: CN2010202568971U
Authority: CN
Inventors: 樊崇理
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-07-14
Filing date: 2010-07-14
Publication date: 2011-02-02
Anticipated expiration: 2020-07-14

Abstract

The utility model discloses a digital mercury sphygmomanometer. Currently, there are mainly two types of sphygmomanometers for measuring the blood pressure of human body, one type is a mercury sphygmomanometer for manually measuring and reading the blood pressure values, and the other type is an electronic sphygmomanometer for automatically measuring the blood pressure of human body. The electronic sphygmomanometer needs to be regularly calibrated, and the accuracy of the mercury sphygmomanometer greatly relies on the experience and operation proficiency of a user. In order to solve the problems, the utility model provides a digital mercury sphygmomanometer which is based on the mercury sphygmomanometer and reads the height of a mercury column with an electronic device and digitally displays the same. The technical scheme is as follows: the digital mercury sphygmomanometer comprises a mercury sphygmomanometer, a data processor, a display unit and a pulse listening device, and is characterized in that the mercury sphygmomanometer is provided with a mercury column height reading device, and the height reading device is connected with the data processor; the pulse listening device is connected with the data processor; and the data processor sends acquired systolic pressure and diastolic force values to the display unit. Compared with the electronic sphygmomanometer, the digital mercury sphygmomanometer has the advantages of more accurate and reliable measuring results as well as convenient and intuitive calibration, simultaneously does not need special training, is applicable to families, hospitals and other occasions, and has high cost performance.

Description

Digital mercury column sphygomanometer

Technical field

This utility model relates to a kind of medical blood pressure measuring instrument, and particularly a kind of application electric technology reads the sphygomanometer of mercury pressure.

Background technology

The sphygomanometer of measuring human blood-pressure at present mainly contains two kinds, a kind of is the mercury column sphygomanometer of manual measurement interpretation pressure value, another kind is the electronic type blood pressure meter that can measure the human blood-pressure value automatically, most electronic type blood pressure meters are to utilize pressure transducer directly to measure the human blood-pressure value on the market, because it is easy to use, do not need specialized training to use, thereby in using, family is popular, but because there is problem such as electronic circuit parameter drift, need periodic calibration, otherwise measured pressure value is unreliable, add problems such as use habit, a lot of people are also worried to the measurement result of this electric sphygmomanometer, so the employed most of sphygomanometers of hospital remain the mercury column sphygomanometer that artificial reading is measured at present, but the accuracy of mercury column sphygomanometer depends on the experience and the skilled operation degree of user to a great extent, and the average family use produces doubt to the result of own interpretation often.

The utility model content

In order to address the above problem, it is a kind of based on mercury column sphygmomanometer that this utility model provides, and application electric technology reads mercury pressure and it is carried out the digital mercury column sphygomanometer that numeral shows.

The technical solution of the utility model is: a kind of digital mercury column sphygomanometer, contain mercury column sphygmomanometer, data processor, display unit, pulse tone and listen to device, mercury column sphygmomanometer is provided with the mercury pressure reading device, and this height reading device is connected with data processor; Pulse tone is listened to device and is connected with data processor, and data processor is sent to display unit with systolic pressure value and diastole force value.This programme is to keep on the basic structure basis of former mercury column sphygmomanometer, by install the mercury pressure self-operated measuring unit additional, pulse tone is listened to device, reads pressure value automatically.Its measuring blood pressure principle and common medical mercury column sphygomanometer are basic identical, different is, common medical mercury column sphygomanometer is the sound of doctor with stethoscope monitoring systolic pressure and diastolic pressure, reads two kinds of pairing mercury pressures of the different sounds, thereby obtains measured's height pressure value; The height change of mercury column was measured by the mercury pressure reading device that installs additional when this digital mercury column sphygomanometer was worked, and pick up has replaced doctor's ear, in measuring process, it has monitored measured's the systolic pressure and the diastolic pressure sound, and data processor reads the corresponding height value of mercury column when obtaining two kinds of different sounds, thereby demonstrates measured's systolic pressure and diastolic pressure numerical value.

As preferably, the mercury pressure reading device, by the optical semiconductor sensing device that is arranged on glass tubing mercury column one side be arranged on the light source of glass tubing mercury column opposite side, and the programmable multiple switch is formed.Miniature semiconductor light-sensitive device along glass tubing mercury column one side word order, be connected on the programmable multiple switch, the corresponding switch bit of each optical semiconductor sensing device, the corresponding mercury pressure of each switch bit, opposite side at the glass tubing mercury column is placed with light source, when changing, mercury pressure in the glass tubing blocks the light of directive opposite corresponding semiconductor light-sensitive device, thereby, make corresponding semiconductor light-sensitive device conducting state change; Data processor receives switch change and the position signalling that the programmable multiple switch sends by output/input interface, thereby measures the mercury pressure value.Influence measurement result for preventing that mercury column is heated, used light source adopts cold light source.

As preferably, pulse tone is listened to device and is made up of sound transducer, pre-amplifier unit, bandpass filtering and signal amplification circuit.In several sound transducers such as electret formula, moving-coil type, condenser type, moving coil pickoff has low frequency characteristic preferably, the frequency range that relatively is fit to 20 hertz to 300 hertz of pulse tones, therefore, the preferred moving-coil type sound transducer of this programme carries out pulse tone and detects.The detection signal of moving-coil type sound transducer is sent into the bandpass filtering amplifying unit through behind the pre-amplifier unit, filters out composition outside 20 to 300 hertz of bands, simultaneously the pulse tone signal is amplified once more, and such processing can effectively improve the capacity of resisting disturbance to noise; Afterwards the pulse tone signal is sent into data processor and carry out judgment processing.Judge process is: cuff is pressed greater than systolic pressure artery blood flow capable of blocking voiceless sound, when the cuff pressure is equal to or less than the intra-arterial maximum pressure, blood flow begins to recover and causes turbulent flow and activate the astillen vibration, the sound transducer that is placed on this moment under the cuff is just heard this turbulent flow vibrations sound, data processor reads the mercury pressure value immediately, this value is systolic pressure, in case the cuff pressure drop is to the diastolic pressure level, blood vessel is fully unobstructed and do not have a turbulent flow, this moment, sound disappeared, data processor reads the mercury pressure value immediately, and this value is diastolic pressure.

As preferably, the mercury pressure reading device, by the optical semiconductor sensing device that is arranged on glass tubing mercury column one side be arranged on and optical semiconductor sensing device homonymy or the vertical light source of glass tubing mercury column, and the programmable multiple switch is formed.Light source being placed on optical semiconductor sensing device the same side, or point source is placed on glass tubing mercury column top, is other two kinds of mercury pressure detection schemes of the present utility model.Because mercury column plays the control action of light to the quasiconductor light-sensitive device equally to refraction, the reflection of light.Influence measurement result for preventing that mercury column is heated, used light source adopts cold light source.

As preferably, digital mercury column sphygomanometer also comprises pressure transducer, and this pressure transducer is arranged on the mercury column bottom.As another kind of implementation of the present utility model, pressure transducer is placed the mercury column bottom, when mercury pressure changes, the volume of mercury column, weight can change, and pick off records corresponding mercury pressure, through data processor processes, be converted into mercury pressure, utilize sound transducer to monitor the variation of pulse tone simultaneously, gather mercury pressure value at that time when determining the sound of diastolic pressure and systolic pressure, obtain diastolic pressure and systolic pressure and in display device, show.

Compared with prior art, the utility model has the advantages that: traditional mercury column sphygomanometer and electronic technology are combined, both the available electron mode read measured's pressure value, also can adopt traditional approach manually to read, and can at any time both be compared mutually, use electric sphygmomanometer relatively, measurement result is more accurate, reliable, and calibration is convenient directly perceived, need not specialized training, be applicable to places uses such as family and hospital, the cost performance height.

Description of drawings

Schematic diagram when Fig. 1 uses the optical semiconductor sensing device to measure mercury pressure for this utility model; Fig. 2 is placed on the sketch map of mercury column homonymy for this utility model optical semiconductor sensing device and light source; Fig. 3 is placed on the cutaway view of mercury column homonymy for this utility model optical semiconductor sensing device and light source; Fig. 4 surveys the sketch map that light source when high is placed on the mercury column top for this utility model adopts light-sensitive device; Schematic diagram when Fig. 5 is this utility model working pressure sensor measurement mercury pressure.

The specific embodiment

Below in conjunction with the drawings and specific embodiments this utility model is elaborated.

Embodiment 1 is referring to Fig. 1, and this figure is the schematic diagram of this utility model when using the optical semiconductor sensing device to measure mercury pressure.The photosensitive tube module 2 of quasiconductor light-sensitive devices such as () the photosensitive resistance of also available quasiconductor, bar shaped LED source 4 (also can be other luminous bodys), programmable multiple switch 5 are formed photo-electric mercury pressure measuring devices.The quantity that the micro semiconductor photosensitive tube is promptly placed in requirement according to different accuracy, the programmable multiple switch integrated circuit can be selected one to multiple for use.Micro semiconductor photosensitive tube light receiving window arranges towards mercury column " " word, and spread length is identical with the mercury column useful range, places semiconductor diode light-emitting section, the photosensitive bank of tubes row of length and quasiconductor same length at the mercury column opposite side; The light receiving window of photosensitive tube adds shade and receives only glancing incidence light, and places photosensitive tube to be subjected on the optical channel mercury column; This routine programmable multiple switch adopts MC33993, this chip is that a programmable multiple switch detects interface device, can detect 22 way switch amount input signals, and give data processor 6 by SPI (serial peripheral interface adopts the 3.3V/5v interface protocol) interface detected on off state.Moving-coil type sound transducer 9, pre-amplifier unit 8, bandpass filtering amplifying unit 7 are formed pulse tone and are listened to device.Pulse tone is sent into pre-amplifier unit 8 and is carried out the signal amplification after sound transducer 9 picks up, send into bandpass filtering amplifying unit 7 afterwards, in this unit the pulse tone after the preliminary amplification is carried out bandpass filtering, amplifies once more, sends into data processor 6 and handles.Wherein the pulse tone pick-up circuit also for increasing signal to noise ratio, in this example is packaged together sound transducer and preposition amplification chip simultaneously because the time constant of pick off self, cable, circuit arrangement etc. has determined the frequency response of pick off.Pre-amplifier unit 8 adopts micropower, instrument amplifier LT1789, and gain adopts single external resistor to set, and gain ranging is 1 to 1000.Bandpass filtering amplifying unit 7 is made up of two parts, filter circuit adopts MAX264, this chip is an integrated filter, constitute band filter (only allowing the signal of 20～300Hz to pass through) by it, filter the power supply in the signal and the high-frequency noise of skin and cuff friction etc., further amplify through amplifier MAX4471 then, obtain the voltage signal of single-chip microcomputer coupling.Data processor 6 adopts electric sphygmomanometers 16 single-chip microcomputer MSP430F449 commonly used, and it has super low-power consumption, 48 I/O mouths, and peripheral hardware, powerful data-handling capacity, system works are stablized in the numerous sheet such as 96 sections LCD driving, A/D converter.For saving electric energy, display unit 10 adopts LCD display, and MSP430F449 directly drives by single-chip microcomputer.1 is the glass tubing mercury column among the figure, and 3 is the pressurization filling channel of mercury column sphygmomanometer, and 11 is system power supply.

The blood pressure measurement principle: same way as was placed when this sphygomanometer was pressed the mercury column sphygmomanometer measurement, opening power, cuff is placed on measured's upper arm lower end with suitable elasticity, sound transducer is placed on the tremulous pulse below the cuff and monitors pulse tone (also sound transducer can be placed in the box body of tonometer and link to each other with cuff by airway), inflatable ball with the mercury column sphygomanometer begins inflation, when the blowing pressure stops inflation during fully greater than systolic pressure, and the vent valve that begins to open on the inflatable ball is slowly exitted, single-chip microcomputer detects pulse tone, occur when detecting pulse tone, read the position of the switch that state has just changed in the programmable multiple switch immediately, and from be stored in data processing unit, read in the position of the switch and the mercury pressure correspondence table with the corresponding height value in this position of the switch as systolic pressure, store stand-by; When detecting that pulse tone diminishes gradually and when finally disappearing, read the position of the switch that state has just changed in the programmable multiple switch at once, and from above-mentioned storage list, read with the corresponding height value in this position of the switch as diastolic pressure, the systolic pressure of front and present diastolic pressure are sent to LCD display, demonstrate pressure value.

Embodiment 2 is referring to Fig. 2, and this figure is the sketch map that this utility model optical semiconductor sensing device and light source are placed on the mercury column homonymy.The 1st, photosensitive tube module of the quasiconductor that is stacked and semiconductor light-emitting-diode module, 2 is glass tubing, the 3rd, hydrargyrum, 4 is the light source scattered light, the 5th, refracted light.The arrangement mode of the photosensitive pipe of quasiconductor, bar-shaped semiconductor LED source shape are identical with embodiment 1, just semiconductor light-emitting-diode light source module and the photosensitive tube module of quasiconductor are placed on the same side of mercury column, the scattered light irradiation of light source is on the mercury column crown type end face that forms owing to the hydrargyrum surface tension effects, horizontal light behind superrefraction incides the photosensitive tube light receiving window, make the photosensitive tube conducting state change, during the height change of mercury column, the photosensitive tube state of mercury column end face correspondence is changed thereupon.Thereafter blood pressure testing process and embodiment 1 are identical.

Fig. 3 is the cutaway view that this utility model optical semiconductor sensing device and light source are placed on the mercury column homonymy, and 1 is optical semiconductor sensing device and light source assembly, and 2 is mercury tube, and 3 is hydrargyrum, and 4 is the semiconductor light sources part in the assembly, and 5 is the photosensitive tube portion of quasiconductor in the assembly.

Embodiment 3 is referring to Fig. 4, and this figure is that this utility model adopts light-sensitive device to survey the sketch map that light source when high is placed on the mercury column top.1 is semiconductor light sources, and 2 is glass tubing, and 3 is hydrargyrum, and 4 is the photosensitive tube module of quasiconductor, and 5 is the light source scattered light, and 6 is the horizontal light after the refraction of mercury column crown type end face.The difference of present embodiment and embodiment 1 is light source is become the point type light source by strip source, is placed on the glass tubing top.The irradiation of the scattered light of top light source is at mercury column crown type end face, the scattered light glancing incidence after refraction to the photosensitive pipe of the quasiconductor corresponding with the mercury column end face, thereby this photosensitive tube conducting state is changed.Thereafter measuring principle and embodiment 1 are identical.

Schematic diagram when embodiment 4 Fig. 5 are this utility model working pressure sensor measurement mercury pressure.The difference of present embodiment and embodiment 1 is: removed the photosensitive tube module of quasiconductor, light source and programmable multiple switch, installed a pressure transducer 3 and a corresponding pre-amplifier unit 4 simultaneously additional, in order to indirect measurement mercury pressure.Liquid-pressure pick-up places the hydrargyrum of lower end level altitude in the glass tubing, when mercury pressure changes, the pressure of this pick off impression changes thereupon, and data processing unit goes out the mercury column height value according to calculation of parameter such as this pressure, hydrargyrum density, glass calibers.Liquid-pressure pick-up is selected the pressure sensor chip of encapsulation on demand for use, pre-amplifier unit 4 is selected amplifier MAX4472 for use, chip is amplified in the low-power consumption of this chip has been integrated four operational amplifiers, amplifier A connects constant-current source, for pressure transducer provides constant electric current, amplifier B, amplifier C and amplifier D form difference input, single-ended output amplifier, and the A/D interface that is directly inputted to single-chip microcomputer MSP430F449 monitors the variation of DC component, and gathers force value according to pulse tone.When pulse tone begins to occur, gather the pressure of pressure transducer and be scaled systolic pressure; When pulse tone weakens and disappear, to gather the pressure of pressure transducer and be scaled diastolic pressure, single-chip microcomputer send display unit LCD to show systolic pressure value and diastolic blood pressure values.Concrete measuring process is identical with embodiment 1.

Claims

1. digital mercury column sphygomanometer, contain mercury column sphygmomanometer, data processor, display unit, pulse tone and listen to device, it is characterized in that: described mercury column sphygmomanometer is provided with the mercury pressure reading device, and this height reading device is connected with described data processor; Described pulse tone is listened to device and is connected with described data processor, and described data processor is sent to display unit with systolic pressure value and diastole force value.

2. according to the described digital mercury column sphygomanometer of claim 1, it is characterized in that: described mercury pressure reading device, by optical semiconductor sensing device that is arranged on glass tubing mercury column one side and the light source that is arranged on glass tubing mercury column opposite side, and the programmable multiple switch is formed.

3. according to the described digital mercury column sphygomanometer of claim 1, it is characterized in that: described pulse tone is listened to device and is made up of audio sensor, preamplifier, bandpass filtering and signal amplification circuit.

4. according to the described digital mercury column sphygomanometer of claim 1, it is characterized in that: described mercury pressure reading device, by the optical semiconductor sensing device that is arranged on glass tubing mercury column one side and being arranged on and optical semiconductor sensing device homonymy or the vertical light source of glass tubing mercury column, and the programmable multiple switch is formed.

5. according to the described digital mercury column sphygomanometer of claim 1, it is characterized in that: also comprise pressure transducer, this pressure transducer is arranged on the mercury column bottom.