CN2159557Y

CN2159557Y - Electronic clinical thermometer/pulse-meter

Info

Publication number: CN2159557Y
Application number: CN 92234702
Authority: CN
Inventors: 李须真
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-10-06
Filing date: 1992-10-06
Publication date: 1994-03-23
Anticipated expiration: 2002-10-06

Abstract

The utility model relates to an electronic clinical thermometer/pulse meter, which is used for medical care and belongs to the field of microcomputer measuring technique. The pulse period is measured to replace counting the pulse rate by the assistance of CPU. A semiconductor temperature sensor with low thermal inertia is adopted to replace a mercury clinical thermometer. The patient's two kinds of datum can be obtained in about 3 seconds and can be stored in RAM besides the real-time display. Compared with the prior art, the utility model has the advantages of rapid speed, accuracy, safety, no requirements on the site recording, etc. The work efficiency and quality can be improved. The principle can be referred to the accompanying drawing.

Description

Electronic clinical thermometer/pulse-meter

The utility model is mainly used in health care, belongs to the microcomputer measurement technical field.

At present each hospital to patient take temperature, pulse follows ancient method always.Survey body temperature mercury oral thermometer.This exterior heat inertia is big, needs just can reach more than three minutes steady intact value.And glass tube is placed in the oral cavity also dangerously, also will prevent cross-infection.With the naked eye watch reading, degree of accuracy also is difficult to guarantee.Surveying pulse is to take arteries and veins, watch second hand, count pulse rate in 1 minute in the heart with finger.Error is bigger.These shortcomings are particularly remarkable in ward nursing, and general patient does once every day, and the severely sick person will do three every day.Also want Pen with paper storage compartment by the bed record, the loaded down with trivial details of its program can be imagined.

The purpose of this utility model be utilize electronic technology provide a kind of not only soon but also accurate, test simultaneously this two item number according to and instrument that can store recording.

The purpose of this utility model is achieved in that by CPU, and the interval time (T) of twice pulse of human body that in the time about 3 seconds test probe is measured, the formula of utilization f=1/T is tried to achieve per minute Pulse Rate (f).Be contained in the semiconductor temperature sensor that also has in the same probe with pulse transducer, when probe contacts with human body, also obtained the body temperature signal.CPU handles this two kinds of signals simultaneously, shows in real time and deposits among the RAM.

With survey cycle replacement measured frequency, replace the mercury oral thermometer with the semiconductor transducer that can reach steady intact value in 0.1 second, owing to adopted this two technology, be again to carry out simultaneously, so can shorten the test duration greatly.And can significantly improve degree of accuracy.As long as the nurse will pop one's head in each contact patients once, by pressing a button, each patient's data just all are stored in the instrument and have gone., wait to get back to access record after the office more one by one or be transported in the PC and go with the band paper and pen.Do not worry thermometer in the oral cavity fracture and prevent cross-infection.

Below in conjunction with drawings and Examples the utility model is further specified

Among the figure, 1 Electret condenser microphone, the 2nd, shaping, 3 timing capacitors, 4 integrated temperature sensor AD590,5 sensor output resistances, 6 voltage comparators, the 7th are amplified in the NE555 pulse, and DA0809 digital to analog converter, the 8th, EPROM 27C64,9 are 373 latchs, 10 keyboards, the 11st, and single-chip microcomputer 80C31,12 liquid crystal latch chip for driving 273,4056,13 liquid crystal DF signal generator NE555,14 segmentation LCD.15 serial ports.

Its principle is as follows: electret (1) picks up the pulse vibration and amplifies through (2) NE555 shaping.555 are connected into monostable form, and making monostable time-delay by change timing capacitor (3) is about 0.3 second, to eliminate clutter.P3.2 mouth by (11) receives at last.Temperature sensor contacts the back corresponding electric current of output and transfers voltage to by (5) with human body.Present embodiment adopts the D/A chip to realize the A/D conversion with the method that compares one by one.The digital signal that the PO mouth is sent progressively changes the analog quantity of (7) output from low to high and compares with the voltage above (5), in case be higher than the voltage of (5), (6) comparer just goes out " 0 ", send the P3.3 of (11).Process is tabled look-up, CPU can learn the patient temperature value.Above-mentioned two kinds of computings are carried out simultaneously, demonstrate per minute Pulse Rate and body temperature value successively by (12) (14) at last and send RAM to store.Keyboard (10) is the selection that is used for starting, specify functions such as bed label, re-reading, serial port transmission.Be in order to distinguish the true and false of pulse about 3 seconds.

Claims

1, a kind of electronic clinical thermometer/sphygmograph, include test probe, it is characterized in that: by CPU, in time about 3 seconds, twice pulse of human body interval time (T) that records by test probe, utilization f=1/T formula when trying to achieve per minute pulse rate (f), obtains the body temperature value to the body temperature signal that is recorded by the conductor temperature sensing that is loaded in the same probe again after CPU handles.

2, electronic clinical thermometer/sphygmograph as claimed in claim 1 is characterized in that: this of each berth two item numbers go according to also being stored among the RAM one by one except real-time demonstration.