CN2138295Y - Electronic instant thermometer - Google Patents
Electronic instant thermometer Download PDFInfo
- Publication number
- CN2138295Y CN2138295Y CN 92218480 CN92218480U CN2138295Y CN 2138295 Y CN2138295 Y CN 2138295Y CN 92218480 CN92218480 CN 92218480 CN 92218480 U CN92218480 U CN 92218480U CN 2138295 Y CN2138295 Y CN 2138295Y
- Authority
- CN
- China
- Prior art keywords
- electronic type
- thermistor
- quick take
- type according
- display
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The utility model relates to an electronic instant thermometer which is suitable to be used to measure the human body temperature. The electronic instant thermometer is composed of a temperature sensor, a signal processor, a display, a power supply and a casing. The temperature sensor adopts the wheatstone bridge structure made up of the thermistor. The signal processor is composed of two operational amplifier circuits and the resistances. The display uses the digital displaying method of the liquid crystal display, the analog meter indicating method or the level displaying method of the luminous diode. The power supply uses the stabilized voltage structure. The electronic instant thermometer has high strength, strong serviceability and short temperature measuring time.
Description
The utility model is a kind of quick take temperature meter of electronic type that is used to measure human body temperature, belongs to the thermometer technical field.
The clinical thermometer of using in family expenses or the medical treatment generally all adopts the glass type mercury clinical thermometer at present, and this clinical thermometer is very thin because of the glass tube walls of mercury probe segment, thereby damages easily.Because the required Measuring Time of this clinical thermometer is longer, generally need about 5 minutes, thereby usable range is subjected to certain restriction, particularly the infant is used, very inconvenient.
The utility model is at the deficiencies in the prior art, and its purpose is to provide the electronic type clinical thermometer that a kind of durability is strong, the thermometric time is short.
The utility model is made up of temperature sensor, signal processor, display power supply and shell, is characterized in that temperature sensor adopts the Wheatstone bridge structure based on thermistor, and signal processor is made of signal holding circuit and signal processing circuit.Display can realize with three kinds of modes, the one, adopt digital display, and available LCD mode realizes; The 2nd, adopt analog gauge outfit to show; The 3rd, adopt light emitting diode (LED) level to show.For fear of changing (mainly be with service time lengthening reduce) because of supply voltage within the specific limits and influence the accuracy of measurement, power supply is made up of battery and voltage stabilizing diode mu balanced circuit that constitutes of connecting with a resistance.For fear of the scope of Yin Wendu overshoot and damage display, be provided with the holding circuit that constitutes by the position diode.
The utility model compared with prior art has advantages such as strong and thermometric time of intensity height, durability is short.Because the circuit structure that adopts is simple, so cost is lower, and the reading intuitive and convenient.
Fig. 1 is a circuit block diagram of the present utility model; Fig. 2 is circuit theory diagrams; Fig. 3 be output current (μ A) with temperature (℃) curve map that changes; Fig. 4 analog structure synoptic diagram; Fig. 5 is a level display type structural representation.
The utility model can adopt scheme shown in the drawings to realize.Power supply (1) is by battery E, resistance R
1With voltage stabilizing diode D
1Constitute, K is a switch.Temperature sensor (2) is by thermistor R
2And resistance R
3, R
4, R
5Form Wheatstone bridge, thermistor can adopt the thermistor of positive temperature coefficient (PTC) or negative temperature coefficient of resistance (NTC), in order to reduce the thermometric time, can select the negative tempperature coefficient thermistor of pearl for use, and bar type structure is adopted in encapsulation.The signal holding circuit of signal processor (3) is by the double operational IC circuit
1And IC
2, peak value keeps capacitor C to constitute, signal processing circuit is by resistance R
6Constitute, realize the interface between signal holding circuit and display.D
2Be catching diode, S is a discharge switch.Display (4) can adopt the reometer of 50 μ A to repack temperature indication gauge outfit into, and temperature measurement accuracy can reach 0.1 ℃, and the thermometric time was less than 10 seconds.As embodiment, can select bar type shell for use, an end is a temperature sensor, and the other end is a display, and signal processor is fixed on display one end, and battery can adopt 6V side's battery, is installed in the middle of the shell.IC
1And IC
2Can adopt the discharge circuit (for example adopting CA3140E) of single supply (5V) high input impedance.D
1Can adopt the voltage stabilizing diode of 5V.The structure of analog display mode as shown in Figure 4, the structure that adopts diode displaying is as shown in Figure 5.
Claims (7)
1, a kind of quick take temperature meter of electronic type that is used to measure human body temperature, form by temperature sensor, signal processor, display, power supply and shell, it is characterized in that temperature sensor adopts the Wheatstone bridge structure based on thermistor, signal processor is made of signal holding circuit and signal processing circuit.
2, the quick take temperature meter of electronic type according to claim 1 is characterized in that the digital display that display adopts LCD to constitute.Adopt analog gauge outfit to show, perhaps the level formula that is made of light emitting diode shows.
3, the quick take temperature meter of electronic type according to claim 1 and 2 is characterized in that power supply is made up of battery and voltage stabilizing diode mu balanced circuit that constitutes of connecting with a resistance.
4, the quick take temperature meter of electronic type according to claim 1 and 2 is characterized in that being provided with the holding circuit that catching diode constitutes.
5, the quick take temperature meter of electronic type according to claim 1 and 2, the signal holding circuit that it is characterized in that signal processor (3) is by the double operational IC circuit
1And IC
2, peak value keeps capacitor C to constitute, signal processing circuit is by resistance R
6Constitute.
6, the quick take temperature meter of electronic type according to claim 1 and 2 is characterized in that thermistor adopts the thermistor of positive temperature coefficient or negative temperature coefficient of resistance.
7, the quick take temperature meter of electronic type according to claim 6 is characterized in that thermistor adopts the negative tempperature coefficient thermistor of pearl, and bar type structure is adopted in encapsulation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92218480 CN2138295Y (en) | 1992-08-08 | 1992-08-08 | Electronic instant thermometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92218480 CN2138295Y (en) | 1992-08-08 | 1992-08-08 | Electronic instant thermometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2138295Y true CN2138295Y (en) | 1993-07-14 |
Family
ID=33765995
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92218480 Expired - Fee Related CN2138295Y (en) | 1992-08-08 | 1992-08-08 | Electronic instant thermometer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2138295Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100487744C (en) * | 2007-11-12 | 2009-05-13 | 中国科学院长春光学精密机械与物理研究所 | Vivo implantation type body temperature wireless real time monitoring system |
| CN102252767A (en) * | 2011-06-24 | 2011-11-23 | 中国航空规划建设发展有限公司 | Temperature transmitter suitable for MF53 thermistor |
| CN107063495A (en) * | 2016-11-28 | 2017-08-18 | 科诺伟业风能设备（北京）有限公司 | Two-wire system PT100 resistance and the compatible temperature measurement circuit of NTC resistance |
-
1992
- 1992-08-08 CN CN 92218480 patent/CN2138295Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100487744C (en) * | 2007-11-12 | 2009-05-13 | 中国科学院长春光学精密机械与物理研究所 | Vivo implantation type body temperature wireless real time monitoring system |
| CN102252767A (en) * | 2011-06-24 | 2011-11-23 | 中国航空规划建设发展有限公司 | Temperature transmitter suitable for MF53 thermistor |
| CN107063495A (en) * | 2016-11-28 | 2017-08-18 | 科诺伟业风能设备（北京）有限公司 | Two-wire system PT100 resistance and the compatible temperature measurement circuit of NTC resistance |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |