Unlock instant, AI-driven research and patent intelligence for your innovation.

Electronic body thermometer and operation control method

An electronic thermometer and measurement technology, used in thermometers, body temperature measurement, thermometers using electrical/magnetic components directly sensitive to heat, etc., can solve the problems of power consumption, shortened battery life, serious power consumption, etc., to reduce consumption. The effect of electricity

Active Publication Date: 2013-08-07
TERUMO KK
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In general, in electronic thermometers used in hospitals, in order to maintain liquid tightness, there is no manual power ON / OFF switch.
In addition, after taking the temperature of the patient, since the time from when the nurse withdraws the thermometer to reading the temperature value is uncertain, the electronic thermometer used in the hospital is usually not equipped with an automatic shutdown function.
Therefore, in many cases, this type of electronic thermometer remains powered on even when the body temperature is not being measured. During this period, power is consumed unnecessarily and the battery life is shortened.
[0006] In particular, in an electronic thermometer using a single-input integrating A / D conversion circuit, in order to measure the transition period of the integrating circuit with higher accuracy, a very high-frequency clock is required, which causes unnecessary power consumption other than during body temperature measurement.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Electronic body thermometer and operation control method
  • Electronic body thermometer and operation control method
  • Electronic body thermometer and operation control method

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0033] 1. The appearance and composition of the electronic thermometer

[0034] figure 1 It is a figure which shows the appearance structure of the electronic thermometer 100 which concerns on one Embodiment of this invention, 1a shows a top view, and 1b shows a side view. 101 is the main body shell, which is accommodated by figure 2 An electronic circuit such as an arithmetic control unit 220 to be described later, a battery (power supply unit) 250 , and the like.

[0035] 102 is a metal cap made of stainless steel, in which a thermistor (details will be described later) and the like for measuring temperature are accommodated. 103 is a power ON / OFF switch, which turns ON the power supply unit 250 when pressed once, and turns OFF the power supply unit 250 when pressed again. In addition, in an electronic thermometer for hospital use, a magnetic reed switch is provided instead of a manually operated ON / OFF switch such as the power supply ON / OFF switch 103 in order to main...

no. 2 approach

[0120] In the first embodiment described above, the temperature measurement process is ended once by repeating charge / discharge of the capacitor 403 four times immediately after the start of the temperature measurement process, but the present invention is not limited thereto. For example, the temperature measurement process may be completed once by repeating charging / discharging of the capacitor 403 three times.

[0121] Specifically, the sequence of discharging is: the first time: discharge through the reference resistance element; the second time: discharge through the reference resistance element; the third time: discharge through the thermistor. Furthermore, the temperature data may be calculated by comparing the second discharge time Tref1 with the third discharge time Tth instead of using the first discharge time Tref0 for temperature data calculation.

[0122] Alternatively, the sequence of discharge is: the first time: discharge via the reference resistance element; t...

no. 3 approach

[0124] In the first embodiment described above, the temperature measurement process is ended once by repeating charge / discharge of the capacitor four times immediately after the start of the temperature measurement process, but the present invention is not limited thereto. For example, the temperature measurement process may end once by repeating charging / discharging of the capacitor after the voltage drop of the power supply unit due to repeated measurement of the discharge time is controlled within a predetermined threshold.

[0125] Figure 9 It is a flowchart showing the flow of temperature measurement processing in this embodiment, Figure 10 It is a graph showing the temporal change of the voltage across the capacitor 403 and the temporal change of the digital signal output from the A / D conversion unit 420 . use Figure 9 and Figure 10 , the flow of the temperature measurement processing in this embodiment will be described.

[0126] First, in step S901, 0 is input ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

An electronic body thermometer comprises an integration circuit connected in series to a thermistor and a capacitor, and a clock generator for generating a clock signal; measures the transient time period when there is a transition from the stationary state to the transient state in the integration circuit by counting the clock signals generated by the clock generator; and calculates a temperature value based on the measured transient time period. The clock generator in the electronic body thermometer switches the frequency of the clock signal on the basis of the calculated temperature value.

Description

technical field [0001] The invention relates to an electronic thermometer and an action control method thereof. Background technique [0002] In the field of electronic thermometers, conventionally, temperature measurement values ​​have been obtained by measuring changes in the resistance of a thermistor accompanying temperature changes. Examples of techniques for measuring such a change in resistance of a thermistor include a method of configuring a CR oscillator including a thermistor and measuring its oscillation frequency, and a method of using a single-input integrating type A / D conversion circuit. method and the like (Patent Document 1). [0003] In temperature measurement using a single-input integrating type A / D conversion circuit, an integrating circuit in which a thermistor and a capacitor are connected in series is used. Furthermore, the temperature value can be calculated by measuring the transition period (charging time or discharging time of the capacitor) of...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01K7/00G01K7/24
CPCG01K13/002G01K7/42G01K13/20
Inventor 萩野喜晴
Owner TERUMO KK