WO2009104604A1 - 電子体温計 - Google Patents
電子体温計 Download PDFInfo
- Publication number
- WO2009104604A1 WO2009104604A1 PCT/JP2009/052703 JP2009052703W WO2009104604A1 WO 2009104604 A1 WO2009104604 A1 WO 2009104604A1 JP 2009052703 W JP2009052703 W JP 2009052703W WO 2009104604 A1 WO2009104604 A1 WO 2009104604A1
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- WIPO (PCT)
- Prior art keywords
- sensor
- contact state
- temperature
- measurement
- probe
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/16—Special arrangements for conducting heat from the object to the sensitive element
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
- G01K13/20—Clinical contact thermometers for use with humans or animals
Definitions
- the present invention relates to an electronic thermometer.
- thermometers that measure body temperature by inserting a probe under the armpit or tongue are known.
- the temperature measuring part at the tip of the probe needs to be in good contact with the part to be measured (for example, the center of the indentation of the heel, the root of the back of the tongue). is there.
- Patent Document 1 describes an electronic thermometer that detects the contact state of a probe using a switch, contact resistance, capacitance, humidity, pressure (contact point), temperature comparison, temperature change, and the like.
- Patent Document 2 describes an electronic thermometer that has a pair of contacts on the surface of a thermometer body and outputs a warning when the contacts are non-conductive.
- the conventional contact detection may cause a false detection when an object other than the human body comes into contact or a hand or a finger comes into contact.
- the temperature measuring part at the tip of the probe may be displaced from the measurement site or may not be in good contact Sometimes.
- it is difficult to detect such a contact failure and as a result, problems such as a decrease in measurement accuracy (prediction accuracy) of body temperature and occurrence of errors may occur.
- JP 61-500038 gazette Japanese Utility Model Publication No. 4-138249
- the present invention has been made to solve the above-described problems of the prior art, and an object of the present invention is to provide an electronic thermometer that can accurately detect the contact state between a temperature measuring unit and a measurement site. It is in.
- the electronic thermometer of the present invention comprises: A probe having a temperature measuring unit at the tip; A first sensor provided in a temperature measuring unit of the probe; A second sensor provided closer to the thermometer body than the temperature measuring section of the probe; Based on the outputs of both the first sensor and the second sensor, a determination unit that determines the quality of the contact state between the temperature measuring unit and the measurement site of the user; An informing unit for informing according to a determination result of the determining unit; It is characterized by providing.
- the outputs of both the first sensor and the second sensor it is possible to evaluate at least two states of the temperature measuring part at the tip of the probe and the part closer to the main body than the temperature measuring part.
- the quality of the contact state can be determined with higher accuracy than in the past.
- the first sensor is a sensor that measures temperature;
- the second sensor is preferably a sensor that senses human contact with the probe.
- the first sensor also serves as a sensor for measuring the temperature of the user.
- the body temperature measurement sensor as a contact state detection sensor, there are advantages such as reduction in the number of parts, miniaturization of the probe tip, and cost reduction compared to providing them individually.
- the notification unit may notify that the contact state is poor. This can prompt the user to correct the probe insertion state.
- the notification unit notifies that the contact state is good, and further notifies that the contact state during body temperature measurement is good.
- thermometer measures body temperature takes several tens of seconds to several minutes, and the user needs to keep the same posture during that time. If the thermometer does not give any notification, some users may feel uneasy about whether the thermometer measurement process continues, or move or remove the thermometer to check the thermometer operation. is there. Therefore, by notifying that the contact state is good, the user can recognize that the measurement process is normally continued, thereby solving such a problem.
- the determination unit determines the level of contact state failure based on the outputs of the first sensor and the second sensor, and the notification unit responds to the level of the defect. It is preferable to perform notification.
- the user can determine whether the contact state is improved by slightly shifting the probe, or whether it is faster to remove the probe from the measurement site and insert it again. Therefore, the usability of the electronic thermometer is improved.
- the determination unit estimates the cause of the bad contact state based on the outputs of the first sensor and the second sensor, and the notification unit responds to the cause of the failure. It is also preferable to perform the notification. At this time, it is more preferable that the notification unit guides a solution to the cause of the defect.
- the user can easily grasp what to do specifically to improve the contact state. This improves the usability of the electronic thermometer and allows the user to learn how to perform a correct measurement.
- FIG. 1 is an external view of an electronic thermometer.
- FIG. 2 is a block diagram of an electronic thermometer.
- FIG. 3 is a diagram illustrating a correct measurement example.
- 4A and 4B are diagrams illustrating an example of a sensor output waveform in a correct measurement example.
- FIG. 5 is a diagram showing a bad measurement example 1.
- FIG. 6A and 6B are diagrams showing examples of sensor output waveforms in the measurement example of FIG.
- FIG. 7 is a diagram illustrating a bad measurement example 2.
- 8A and 8B are diagrams illustrating examples of sensor output waveforms in the measurement example of FIG.
- FIG. 9 is a diagram showing a bad measurement example 3.
- 10A and 10B are diagrams illustrating examples of sensor output waveforms in the measurement example of FIG. FIG.
- FIG. 11 is a flowchart of body temperature measurement processing according to the first embodiment.
- 12A and 12B are diagrams illustrating an example of a sensor output waveform when the thermometer is detached during body temperature measurement.
- FIG. 13 is a flowchart of body temperature measurement processing according to the second embodiment.
- FIG. 14 is a flowchart of body temperature measurement processing according to the third embodiment.
- FIG. 15 is a diagram illustrating an example (LED) of a notification unit.
- FIG. 16 is a diagram illustrating an example of a notification unit (vibration motor).
- FIG. 17 is a diagram illustrating an example of a notification unit (speaker).
- FIG. 18 is a flowchart of body temperature measurement processing (before measurement) according to the fourth embodiment.
- FIG. 19 is a flowchart of body temperature measurement processing (during measurement) according to the fourth embodiment.
- FIG. 20 is a flowchart of body temperature measurement processing (before measurement) of the fifth embodiment.
- FIG. 21 is a flowchart of body temperature measurement processing (during measurement) according to the fifth embodiment.
- FIG. 22 is a determination table of the contact state and the cause of failure before body temperature measurement.
- FIG. 23 is a determination table of the contact state and cause of failure during body temperature measurement.
- FIG. 1 is a diagram showing a schematic configuration of an entire electronic thermometer according to an embodiment of the present invention.
- the electronic thermometer 1 has a thermometer body 2 having a display unit, a switch, and the like, and a probe 3 that is sandwiched between an armpit, a sublingual, and the like.
- the thermometer main body 2 includes a housing 20 made of ABS resin or the like provided with a display window, a switch, and the like, and internal components (circuit board, power supply, display panel such as LCD, buzzer, etc.) housed in the housing 20 Composed.
- the probe 3 is an internal hollow tapered rod-like member extending in the longitudinal direction from the longitudinal end portion of the thermometer body 2 having a substantially rectangular parallelepiped shape, and includes a temperature measuring unit 3a at the tip thereof.
- the probe 3 is made of an elastomer or a resin.
- thermometer main body the structure which the probe and the housing of the thermometer main body are united may be sufficient.
- the temperature measuring part 3a at the tip of the probe 3 is composed of a cap 5 made of stainless steel (SUS) or the like, and a temperature sensor (first sensor) 6 such as a thermistor embedded and fixed inside the cap 5 with an adhesive.
- the temperature sensor 6 is electrically connected to a CR oscillation circuit in the internal component.
- the temperature sensor 6 changes the resistance value corresponding to the heat transmitted from the outer surface of the temperature measuring unit 3a (cap 5), and the change in the resistance value is output to the CR oscillation circuit to measure the body temperature. .
- the probe 3 is provided with a contact detection sensor (second sensor) 7 slightly closer to the thermometer body 2 than the temperature measuring unit 3a.
- the contact detection sensor 7 is a sensor for detecting contact of the human body with the probe 3.
- the probe 3 is sandwiched between the armpit and the tongue, and the temperature measuring unit 3a (the temperature sensor 6) is at the measurement site with the highest temperature (center of the indentation of the eyelid, the root on the back side of the tongue, etc.). It is performed in a fixed state. Therefore, the arrangement of the contact detection sensor 7 is determined at a position where the touch detection sensor 7 is sufficiently in contact with the heel, the tongue, and the like when the temperature sensor 6 is correctly attached to the measurement site.
- the contact detection sensor 7 for example, any type of sensor such as a capacitance sensor, a pressure sensor, a photoelectric sensor, a temperature sensor, and a switch type sensor can be used.
- a capacitance sensor that detects a change in capacitance due to contact with a human body is illustrated.
- the touch sensor 7 is electrically connected to a CR oscillation circuit in the internal component.
- FIG. 2 is a block diagram of an electronic thermometer.
- the electronic thermometer 1 mainly includes a temperature sensor (first sensor) 6, a contact sensor (second sensor) 7, a power supply unit 11, an LCD 12, a buzzer 13, and a CPU (center).
- Processing device) 14 a memory 15, and CR oscillation circuits 16 and 17.
- the power supply unit 11 has a power source such as a battery and supplies power to the CPU 14.
- LCD12 displays a measurement result etc. by control from CPU14 as a display part.
- the buzzer 13 sounds an alarm under the control of the CPU 14.
- the CPU 14 is connected to a memory 15 including a storage device such as a ROM or a RAM.
- the CR oscillation circuit 16 outputs a signal having an oscillation frequency corresponding to the resistance value of the temperature sensor 6.
- the CPU 14 counts the frequency signal and calculates the temperature.
- the CR oscillation circuit 17 outputs a signal having an oscillation frequency corresponding to the capacitance of the touch sensor 7.
- the CPU 14 counts the frequency signal and calculates a capacitance value.
- the temperature measuring unit 3a at the tip of the probe needs to be firmly in contact with a predetermined measurement site under the armpit or the tongue.
- a predictive thermometer it is very important to keep the contact state good because the contact state between the temperature measuring unit and the measurement site can greatly affect the prediction accuracy. Therefore, it is preferable to check the contact state of the temperature measuring unit before starting the measurement of the body temperature or during the body temperature measurement, to notify the user of the result, or to control the operation of the thermometer as necessary.
- the CPU 14 determines whether the contact state between the temperature measuring unit 3a and the part to be measured is good or not based on the outputs (temperature and capacitance information) of both the temperature sensor 6 and the contact sensor 7. Determine. And according to the determination result, it alert
- the CPU 14 corresponds to the determination unit in the present invention, and the LCD 12 and the buzzer 13 respectively correspond to the notification unit of the present invention.
- the purpose of combining the outputs of both the temperature sensor 6 and the contact sensor 7 is to reduce false detection and improve detection accuracy.
- a specific example will be described.
- FIG. 3 shows an example of correct measurement.
- the probe 3 is firmly sandwiched between the scissors, and the temperature measuring portion 3 a at the tip of the probe is in good contact with the measurement site (indentation) under the scissors.
- 4A and 4B are examples of sensor output waveforms in a correct measurement example
- FIG. 4A shows the output of the touch sensor 7 (horizontal axis: time, vertical axis: capacitance)
- FIG. 4B shows the temperature sensor 6.
- the capacitance increases to about 3 pF, and the temperature starts to rise. The rate of temperature increase is initially large, but the temperature rises gradually as it approaches body temperature.
- FIG. 5 shows a bad measurement example 1.
- the thermometer is inserted too deeply, and the temperature measuring part 3a at the tip of the probe protrudes from the armpit.
- 6A and 6B are examples of sensor output waveforms in the measurement example of FIG. Since the temperature measuring unit 3a is not correctly in contact with the part to be measured, the temperature sensor output hardly changes. On the other hand, since the portion of the touch sensor 7 is sandwiched between the armpits, the change in the capacitance exhibits almost the same behavior as in the case of the correct measurement example (see FIG. 4B). Therefore, even if only the output of the contact detection sensor 7 is monitored, it is understood that the contact failure as shown in FIG. 5 cannot be detected. Also, when the probe 3 is gripped with a hand or a finger, a change in capacitance as shown in FIG.
- FIG. 7 shows bad measurement example 2.
- the thermometer is not inserted and only the tip of the probe 3 is sandwiched. In this state, the thermometer is unstable and the temperature measuring unit 3a has not reached the site to be measured. Therefore, there is a high possibility that the thermometer will be shifted during the measurement, or that an accurate body temperature cannot be measured (predicted).
- 8A and 8B are examples of sensor output waveforms in the measurement example of FIG. Since the probe 3 is loose, the change in the output of the touch sensor 7 is very small. On the other hand, since the temperature sensor 6 is sandwiched between the armpits, an increase in temperature is observed. Therefore, it is understood that it is difficult to detect the contact failure as shown in FIG.
- FIG. 9 shows bad measurement example 3.
- the sandwiching method is loose, and a gap is generated between the probe 3 and the eyelid (skin).
- 10A and 10B are examples of sensor output waveforms in the measurement example of FIG. It can be seen that both the touch sensor 7 and the temperature sensor 6 do not change much in output.
- FIG. 11 is a flowchart of body temperature measurement processing according to the first embodiment.
- the CPU 14 When the power source of the electronic thermometer 1 is turned on (S101), the CPU 14 starts measuring the temperature by the temperature sensor 6 (S102) and starts measuring the capacitance by the contact sensor 7 (S103).
- the CPU14 determines the quality of the contact state of the temperature measuring part 3a and a to-be-measured site
- a predetermined value for example, 0.5 pF
- the condition (2) is not satisfied.
- the probe is simply grasped with a hand or a finger.
- the condition (1) is not satisfied, and in the case of the types shown in FIGS. 9, 10A, and 10B, (1) and (2) Both conditions are not met. Therefore, a correct determination result that “the contact state is bad” is obtained for any type.
- the CPU 14 When it is determined that the contact state is poor (S104; NO), the CPU 14 sounds the buzzer 13 and issues an alarm (S105). Thus, by notifying that the contact state is defective, it is possible to prompt the user to correct the probe insertion state.
- S102 to S106 is repeated for a certain time (for example, 15 seconds) from the occurrence of the alarm (S106; NO). If the contact state is not improved even after a lapse of a certain time (S106; YES), the CPU 14 stops the measurement and displays an error display on the LCD 12 (S107).
- a certain time for example, 15 seconds
- the CPU 14 stops the alarm (S108) and starts predicting the body temperature (S109).
- the CPU 14 continues to measure the temperature with the temperature sensor 6 (S110) and measure the capacitance with the contact sensor 7 (S111). And CPU14 determines the quality of the contact state of the temperature measurement part 3a and a to-be-measured part based on the output of both sensors (S112). Specifically, the CPU 14 determines that (a) the capacitance value is greater than a predetermined value (for example, 0.5 pF) as compared to the value immediately after power-on, and (b) the maximum temperature from power-on to the present. If the value obtained by subtracting the current temperature from the value is smaller than a predetermined value (for example, 1 ° C.), it is determined that “the contact state is good”.
- a predetermined value for example, 0.5 pF
- the CPU 14 If a contact failure is detected during body temperature measurement (S112; NO), the CPU 14 sounds the buzzer 13 and issues an alarm (S113). Thus, by notifying that the contact state is poor, it is possible to prompt the user to correct the probe insertion state or to close the heel firmly. If the contact state is not improved even after a lapse of a certain time from the occurrence of the alarm (S114; YES), the CPU 14 stops the measurement and displays an error display on the LCD 12 (S115).
- the CPU 14 stops the alarm (S116) and continues to detect the body temperature and the capacitance until the prediction completion condition is satisfied (S117; NO).
- a predetermined value for example, 60 seconds
- a contact state defect S112; NO
- the counting of elapsed time is interrupted or reset, and the count is restarted after the contact state becomes good.
- prediction completion conditions whether the temperature increase rate became smaller than predetermined value.
- the CPU 14 ends the measurement, calculates the predicted body temperature, and displays it on the LCD 12 (S118).
- a temperature sensor for body temperature measurement as a sensor for detecting the contact state, there are advantages such as reduction in the number of parts, miniaturization of the probe tip, and cost reduction compared to providing them individually.
- the present embodiment can be particularly suitably used in a predictive thermometer. That is, instead of being able to measure the temperature in a short time, the predictive thermometer may reduce the accuracy of the prediction result if the part to be measured is not firmly in contact with the temperature measuring unit.
- the predictive thermometer may reduce the accuracy of the prediction result if the part to be measured is not firmly in contact with the temperature measuring unit.
- FIG. 13 is a flowchart of body temperature measurement processing according to the second embodiment.
- the difference from the first embodiment (FIG. 11) is that there is no processing of S106, S107, S114, and S115. That is, in the first embodiment, the measurement is stopped and an error is displayed when the contact state failure continues for a certain time, but in the second embodiment, the alarm is continuously output until the contact state becomes good.
- thermometer of the present embodiment does not fall into an error state, there is no need for resetting, and usability is improved.
- FIG. 14 is a flowchart of body temperature measurement processing according to the third embodiment.
- the difference from the first embodiment (FIG. 11) is that there are no processes of S105, S108, S113, and S116, but include processes of S300 and S301 instead. That is, in the first embodiment, “the contact state is bad” is output as an alarm, whereas in the third embodiment, “the contact state is good” is notified (S300, S301).
- the CPU 14 sounds the buzzer 13 as, for example, “Pi, Pi” (S300).
- the user can recognize that the current contact state is good and that the measurement of the body temperature has started.
- the buzzer 13 periodically rings “Pi, Pi” (S301). Measurement of body temperature takes several tens of seconds to several minutes, during which the user needs to keep the same posture. If the thermometer does not give any notification, some users may feel uneasy about whether the thermometer measurement process continues, or move or remove the thermometer to check the thermometer operation. is there. In that regard, if the contact state is regularly informed, the user can be made aware that the measurement process continues normally, and thus such a problem can be solved.
- the notification by the buzzer 13 is exemplified, but the configuration of the notification unit is not limited to this.
- the quality of the contact state may be notified by the light of the LED 21 or the display of the LCD 12.
- the quality of the contact state may be notified by vibrating the vibration motor 23 provided on the substrate 22.
- Example 4> 18 and 19 are flowcharts of the body temperature measurement process of the fourth embodiment.
- the difference from the first embodiment (FIG. 11) is that the processes of S105 and S113 are not provided, and the processes of S400 to S409 are included instead.
- the CPU 14 determines the defect level of the contact state (S400, S401, S405, S406),
- the notification unit performs notification according to the defect level (S402 to S404, S407, S409).
- the CPU 14 determines that “the contact state is good” (S104; YES). When ⁇ C ⁇ 0.5 pF or ⁇ T ⁇ 1 ° C., the CPU 14 proceeds to the determination of the defect level (S104; NO).
- the defect level is determined as “1” (S400; YES), and an alarm corresponding to level 1 is issued (S402).
- output modes such as ringing the buzzer at a “small” volume, turning on a “green” LED, generating “weak” vibration, and outputting “slow” sound are conceivable.
- the defect level is determined as “2” (S401; YES), and an alarm corresponding to level 2 is issued (S403).
- output modes such as ringing the buzzer at “medium” volume, turning on the “red and green” LEDs, generating “medium” vibration, and outputting “slow” sound are conceivable.
- the defect level is determined to be “3”, and an alarm corresponding to level 3 is issued (S404).
- output modes such as ringing the buzzer at “large” volume, turning on the “red” LED, generating “strong” vibration, and outputting “slowly loose” sound are conceivable.
- ⁇ Ca current capacitance—capacitance immediately after power-on
- ⁇ Ta maximum temperature from power-on to present-current temperature
- the CPU 14 determines that “the contact state is good” (S112; YES). When ⁇ Ca ⁇ 0.5 pF or ⁇ Ta ⁇ 1 ° C., the CPU 14 proceeds to the determination of the defect level (S112; NO).
- the defect level is determined as “1” (S405; YES), and an alarm corresponding to level 1 is issued (S407).
- the defect level is determined as “2” (S406; YES), and an alarm corresponding to level 2 is issued (S408).
- the defect level is determined to be “3”, and an alarm corresponding to level 3 is issued (S409).
- the alarm output mode is the same as described above.
- the user when the contact state is defective, the user can be notified of the level of the defect. If the level of the defect can be recognized, the user can determine whether the contact state is improved by slightly shifting the probe 3 or whether it is faster to remove the probe 3 from the measurement site and insert it again. Therefore, the usability of the electronic thermometer is improved.
- Example 5> 20 and 21 are flowcharts of the body temperature measurement process of the fifth embodiment.
- the difference from the first embodiment (FIG. 11) is that the processing of S105 and S113 is not performed, and the processing of S500 to S513 is included instead.
- the first embodiment only a warning is output when it is determined that the contact state is poor.
- the cause that the CPU 14 has a poor contact state based on the outputs of the temperature sensor and the contact detection sensor. (Cause of failure) is estimated (S500 to S502, S507 to S509), and the notification according to the cause of failure is performed by the notification unit (S503 to S506, S510 to S513).
- the CPU 14 calculates the following two values ⁇ C and ⁇ T. Then, the CPU 14 determines the contact state and the cause of failure from the combination of the values of ⁇ C and ⁇ T.
- ⁇ C current capacitance ⁇ capacitance immediately after power-on
- ⁇ T current temperature ⁇ 1 second temperature
- FIG. 22 is a determination table of contact state and cause of failure before body temperature measurement.
- the vertical axis indicates the value of ⁇ T
- the horizontal axis indicates the value of ⁇ C.
- the cause of failure 1 is the protrusion of the probe tip (type of FIG. 5)
- the cause of failure 2 is the pinching of the probe tip only (type of FIG. 7)
- the cause of failure 3 is the occurrence of a gap ( FIG. 9).
- the CPU 14 determines that “the contact state is good” (S104; YES). When ⁇ C ⁇ 0.5 pF or ⁇ T ⁇ 1 ° C., the CPU 14 proceeds to estimate the cause of the defect (S104; NO).
- the cause of failure is determined as “1” (S500; YES), and an alarm corresponding to the cause of failure 1 is issued (S503).
- output modes such as making the buzzer ring at a “small” volume, turning on a “green” LED, and causing “weak” vibrations are conceivable.
- a voice guide may be output to improve the contact state, such as “The tip of the thermometer protrudes. Pull the thermometer slightly forward.”
- the cause of failure is determined as “2” (S501; YES), and an alarm corresponding to failure cause 2 is issued (S504).
- output modes such as ringing the buzzer at “medium” volume, turning on “red and green” LEDs, and generating “medium” vibration are conceivable.
- a guide such as “Please insert the thermometer deeply” may be output by voice.
- the cause of failure is determined as “3” (S502; YES), and an alarm corresponding to the cause of failure 3 is issued ( S505).
- output modes such as making the buzzer ring at a “large” volume, turning on a “red” LED, and causing “strong” vibration are conceivable.
- a guide such as “Please hold the thermometer firmly” may be output by voice.
- thermometer In other cases (S502; NO), it is determined that the thermometer has not yet been inserted into the armpit, and an alarm is issued (S506). For example, output modes such as making the buzzer ring at a “large” volume, turning on a “red” LED, and causing “strong” vibration are conceivable. In addition, a guide such as “You can measure body temperature. Please pinch a thermometer” may be output by voice.
- ⁇ Ca current capacitance—capacitance immediately after power-on
- ⁇ Ta maximum temperature from power-on to present-current temperature
- FIG. 23 is a determination table of contact state and cause of failure during body temperature measurement.
- the vertical axis indicates the value of ⁇ Ta
- the horizontal axis indicates the value of ⁇ Ca.
- Failure causes 1 to 3 are the same as those described in FIG.
- the CPU 14 determines that “the contact state is good” (S112; YES). When ⁇ Ca ⁇ 0.5 pF or ⁇ Ta ⁇ 0.5 ° C., the CPU 14 proceeds to estimate the cause of the defect (S112; NO).
- the cause of failure is determined to be “3” (S509; YES), and an alarm or voice guide corresponding to the cause of failure 3 is issued ( S512).
- S509; NO it is determined that the thermometer has come off the armpit, and an alarm and a voice guide are issued (S513).
- the output mode of the alarm and the voice guide is the same as that described above.
- the contact state when the contact state is defective, it is possible to inform the user of the cause of the defect and the solution.
- the user can easily grasp what to do specifically in order to improve the contact state. This improves the usability of the electronic thermometer and allows the user to learn how to perform a correct measurement.
- the configuration of the embodiment described above is merely a specific example of the present invention.
- the present invention is not limited to the above specific examples, and various modifications are possible within the scope of the technical idea.
- the specific flow of the judgment process, judgment threshold, notification and voice guide output mode, failure level judgment method, failure cause estimation method, etc., the type and sensitivity of the sensor used, and the thermometer product specifications What is necessary is just to design suitably according to.
- the configurations described in the above embodiments may be combined with each other.
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Abstract
Description
先端に測温部を有するプローブと、
前記プローブの測温部に設けられた第1センサと、
前記プローブの測温部よりも体温計本体寄りに設けられた第2センサと、
前記第1センサと前記第2センサの両方の出力に基づいて、前記測温部と使用者の被測定部位との接触状態の良否を判定する判定部と、
前記判定部の判定結果に応じて報知を行う報知部と、
を備えることを特徴とする。
前記第2センサは、前記プローブに対する人体の接触を感知するセンサであることが好ましい。
まず、図1を参照して、本発明の実施例に係る電子体温計の基本構成について説明する。図1は、本発明の実施例に係る電子体温計全体の概略構成を示す図である。
図2は、電子体温計のブロック図である。図2に示すように、電子体温計1は、主として、温度センサ(第1センサ)6と、接触感知センサ(第2センサ)7と、電源部11と、LCD12と、ブザー13と、CPU(中央処理装置)14と、メモリ15と、CR発振回路16、17と、を備えている。
上述したように、正確な体温を測定するには、プローブ先端の測温部3aが腋下や舌下の所定の被測定部位にしっかりと接触し固定される必要がある。特に予測式の体温計の場合は、測温部と被測定部位との接触状態が予測精度に大きく影響を与えうるため、接触状態を良好に保つことが非常に重要である。したがって、体温の測定開始前や体温測定中に測温部の接触状態をチェックして、その結果を使用者に報知したり、必要に応じて体温計の動作を制御したりすることが好ましい。
図11は、実施例1の体温測定処理のフローチャートである。
本実施例によれば、温度センサと接触感知センサの両方の出力を参照することにより、プローブ先端の測温部とそれよりも本体寄りの部分の少なくとも2箇所の状態を評価できるため、測温部と被測定部位の接触状態の良否を従来よりも精度良く判定可能である。
図13は、実施例2の体温測定処理のフローチャートである。実施例1(図11)との相違は、S106、S107、S114、S115の処理がない点である。つまり、実施例1では、接触状態の不良が一定時間続くと測定を中止しエラーを表示したが、実施例2では、接触状態が良好になるまで警報を出力し続ける。
図14は、実施例3の体温測定処理のフローチャートである。実施例1(図11)との相違は、S105、S108、S113、S116の処理がなく、代わりにS300、S301の処理を含む点である。つまり、実施例1では、「接触状態が不良であること」を警報として出力したのに対し、実施例3では、「接触状態が良好であること」を報知するのである(S300、S301)。
図18および図19は、実施例4の体温測定処理のフローチャートである。実施例1(図11)との相違は、S105、S113の処理がなく、代わりにS400~S409の処理を含む点である。実施例1では、接触状態が不良と判定された場合に警報を出力するだけであったが、実施例4では、CPU14が接触状態の不良レベルを判定し(S400、S401、S405、S406)、報知部によって不良レベルに応じた報知を行う(S402~S404、S407、S409)。
S104において、CPU14は、以下の2つの値ΔCとΔTを算出する。
ΔC=現在の静電容量-電源投入直後の静電容量
ΔT=現在の温度-1秒前の温度
体温測定中には、S112において、CPU14は、以下の2つの値ΔCaとΔTaを算出する。
ΔCa=現在の静電容量-電源投入直後の静電容量
ΔTa=電源投入から現在までの最高温度-現在の温度
図20および図21は、実施例5の体温測定処理のフローチャートである。実施例1(図11)との相違は、S105、S113の処理がなく、代わりにS500~S513の処理を含む点である。実施例1では、接触状態が不良と判定された場合に警報を出力するだけであったが、実施例5では、CPU14が温度センサと接触感知センサの出力に基づいて接触状態が不良である原因(不良原因)を推定し(S500~S502、S507~S509)、報知部によって不良原因に応じた報知を行う(S503~S506、S510~S513)。
S104において、CPU14は、以下の2つの値ΔCとΔTを算出する。そして、CPU14は、ΔCとΔTの値の組み合わせから、接触状態および不良原因を判定する。
ΔC=現在の静電容量-電源投入直後の静電容量
ΔT=現在の温度-1秒前の温度
体温測定中には、S112において、CPU14は、以下の2つの値ΔCaとΔTaを算出する。そして、CPU14は、ΔCaとΔTaの値の組み合わせから、接触状態および不良原因を判定する。
ΔCa=現在の静電容量-電源投入直後の静電容量
ΔTa=電源投入から現在までの最高温度-現在の温度
Claims (7)
- 先端に測温部を有するプローブと、
前記プローブの測温部に設けられた第1センサと、
前記プローブの測温部よりも体温計本体寄りに設けられた第2センサと、
前記第1センサと前記第2センサの両方の出力に基づいて、前記測温部と使用者の被測定部位との接触状態の良否を判定する判定部と、
前記判定部の判定結果に応じて報知を行う報知部と、
を備えることを特徴とする電子体温計。 - 前記第1センサは、温度を測定するセンサであり、
前記第2センサは、前記プローブに対する人体の接触を感知するセンサであることを特徴とする請求の範囲第1項に記載の電子体温計。 - 前記第1センサは、前記使用者の体温を測定するためのセンサを兼ねていることを特徴とする請求の範囲第1項または第2項に記載の電子体温計。
- 前記報知部は、少なくとも体温測定中の接触状態が良好であることを報知することを特徴とする請求の範囲第1項または第2項に記載の電子体温計。
- 接触状態が不良である場合に、前記判定部が、前記第1センサと前記第2センサの出力に基づいて接触状態の不良のレベルを判定し、前記報知部が、前記不良のレベルに応じた報知を行うことを特徴とする請求の範囲第1項または第2項に記載の電子体温計。
- 接触状態が不良である場合に、前記判定部が、前記第1センサと前記第2センサの出力に基づいて接触状態が不良である原因を推定し、前記報知部が、前記不良の原因に応じた報知を行うことを特徴とする請求の範囲第1項または第2項に記載の電子体温計。
- 前記報知部が、前記不良の原因に対する解決策をガイドすることを特徴とする請求の範囲第6項に記載の電子体温計。
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