CN201734699U - Fast electronic clinical thermometer for forehead measurement - Google Patents
Fast electronic clinical thermometer for forehead measurement Download PDFInfo
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- CN201734699U CN201734699U CN2010202111453U CN201020211145U CN201734699U CN 201734699 U CN201734699 U CN 201734699U CN 2010202111453 U CN2010202111453 U CN 2010202111453U CN 201020211145 U CN201020211145 U CN 201020211145U CN 201734699 U CN201734699 U CN 201734699U
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Abstract
The utility model relates to a fast electronic clinical thermometer for forehead measurement. The clinical thermometer comprises a temperature sensing unit, an amplifying circuit unit, a filter circuit unit, a central processing unit, a clock circuit unit, a liquid crystal display circuit unit, a power supply unit, a keyboard circuit unit and a memory unit, wherein the amplifying circuit unit, the temperature sensing unit and the central processing unit are connected in sequence; and the central processing unit is connected with the clock circuit unit, the liquid crystal display circuit unit, the keyboard circuit unit, the power supply unit and the memory unit. The fast electronic clinical thermometer for forehead measurement has the advantages of reliable and safe measurement position, short measuring time, and convenient and sanitary measurement; and the classified storage of temperature measuring data can be called instantly.
Description
Technical field
This utility model relates to a kind of clinical thermometer, particularly relates to a kind of electronic clinical thermometer.
Background technology
Body temperature is commonly called the barometer of human body health, and the disease illness appears in the health that unusually just indicating of body temperature.So if will carry out real-time detection to health, the take temperature approach that is absolutely necessary.Especially for the neonate of resistance difference, its adaptive capacity imperfection is easy to produce disease, then seems extremely important so baby's body temperature measured timely.Based on the glass hydrargyrum cylinder temperature meter of principle of expanding with heat and contracting with cold is the clinical thermometer of normal use at present, though that its uses is simple, measures accurately, and have following many disadvantages: 1, Measuring Time is longer, and one will be measured could obtain body temperature accurately more than five minutes; 2, use inconvenience, must clamp clinical thermometer with arm during take temperature, influence is normal movable; 3, unhygienic, need alcohol disinfecting to keep the cleaning of clinical thermometer before the measurement; 4, dangerous, this is its maximum defective, and gauger's misoperation can cause the fragmentation of clinical thermometer, hydrargyrum is revealed, contaminated environment, even cause that personnel poison, when particularly measuring child's body temperature, because crying and screaming or not noting of child is more prone to cause danger; 5, unreliable, the measuring method of one body temperature in the actual life, from fixing of clinical thermometer, the judgement of Measuring Time, the result reads, and all is manually-operated completely, and the error of any operation all might cause the inaccurate of measurement result; 6, measurement data can't be preserved, and all metrical informations of one clinical thermometer all belong to disposable measurement, and data can't be preserved, and the gauger can't obtain the measurement historical data of oneself in the very first time, and this measuring method lags behind the development of current era undoubtedly.
The utility model content
The purpose of this utility model is to provide swift electron clinical thermometer that a kind of forehead measures not high with the accuracy of measurement that solves at present existing clinical thermometer and exist, the problem that reliable measuring data and safety are low and the data of surveying can't be preserved.
In order to solve the problems of the technologies described above, this utility model adopts following technical scheme: the swift electron clinical thermometer that a kind of forehead is measured, comprise the temperature sensor unit, amplifier circuit unit, the filter circuit unit, central processing unit, the clock circuit unit, the liquid crystal display circuit unit, the power supply power supply unit, keyboard circuit unit and memory element, described amplifier circuit unit, the temperature sensor unit is connected successively with central processing unit, described central processing unit and clock circuit unit, the liquid crystal display circuit unit, the keyboard circuit unit, the power supply power supply unit is connected with memory element.
Described temperature sensor unit adopts AD590 as temperature sensor.
Described amplifier circuit unit is made up of 1 operational amplifier and peripheral 3 resistance, and described 1 operational amplifier and peripheral 3 resistance connect according to the connected mode of sign-changing amplifier.
Described filter circuit unit is a low pass filter, it is made up of 1 operational amplifier and peripheral 3 resistance and 1 electric capacity, described 1 operational amplifier and peripheral 3 resistance connect according to the connected mode of sign-changing amplifier, and described electric capacity is connected in described inverting amplifier front end.
Described central processing unit is that model is the single-chip microcomputer of MSP430F449.
Described data storage cell adopts an E2PROM chip to be connected with central processing unit.
Described clock circuit unit is made up of 1 clock chip PCF8563 and 4 resistance, 3 leaded multilayer ceramic capacitor and 1 crystal oscillator, wherein 2 leaded multilayer ceramic capacitor and crystal oscillator are formed 1, the 2 foot two ends that an oscillating circuit is connected in PCF8563, other 1 leaded multilayer ceramic capacitor links to each other with power supply by 8 feet as power filtering capacitor one end, other end ground connection, 4 signal pull-up resistors of resistance are connected to 3 feet, 5 feet, 6 feet and 7 feet of PCF8563.
Described MSP430F449 single-chip microcomputer comprises a segmentation liquid crystal drive mouth, and described liquid crystal display circuit unit comprises 1 segmentation liquid crystal, and described segmentation liquid crystal is connected to the MSP430F449 single-chip microcomputer by segmentation liquid crystal drive mouth.
Described power supply power supply unit is divided into 9V power supply unit and 3.3V power supply unit two parts.
The beneficial effects of the utility model: the swift electron clinical thermometer that this utility model provides a kind of forehead to measure, it is compared existing mercurial thermometer and has following beneficial effect: 1, reliable, the safety in measuring position: the forehead thermometric is compared with temp measuring method in the past has some tangible advantages, at first, cavity temperature is an important indicator that characterizes the whole body temperature of patient in the brain, forehead distance therewith is very near, so the accuracy of data can be guaranteed; Secondly, across skull and very thin scalp layer, its thermal model is relatively stable between the metastable brain of forehead and temperature, and is little with differences such as the patient are fat or thin; Simultaneously the forehead thermometric does not relate to the safety problem of mode such as ear table thermometric to human body, and therefore, forehead thermometric mode has more reliability and safety with respect to traditional thermometric mode.
2, the thermometric time is short: the swift electron clinical thermometer that the utility model forehead is measured is based on the electronic circuit principle, has the dynamic electric resistor height by use, the fast AD590 of response speed is as temperature sensor, utilize the mode that circuit amplifies and central processor unit is handled, can well solve the problem of in the past growing, improve temperature measuring efficiency greatly based on the mercurial thermometer Measuring Time of principle of expanding with heat and contracting with cold.
3, thermometric is convenient and healthy: because the measuring position forehead exposes, need not the patient and untie the clothes measurement, and very convenient; Simultaneously, because it directly can be attached to thermometric on the human body forehead with the AD590 temperature sensor that is embedded in the heat insulation block, be different from one mercury clinical thermometer and relate to oral cavity, anus hygienic issues with the gill table.
4, the classification of temperature measurement data is stored and called immediately: the swift electron clinical thermometer that this utility model forehead is measured has used pin-saving chip, can classify according to its capacity and to store different measured's tens of groups of temperature measurement data, simultaneously, the measured can be by the checking oneself temperature measurement data in the past and corresponding thermometric time of button and liquid crystal display objective interface, has more practicality and hommization than in the past temp measuring method.
Description of drawings
Fig. 1 is the schematic diagram of the swift electron clinical thermometer of a kind of forehead measurement of this utility model; Fig. 2 is temperature sensor circuit figure of the present utility model; Fig. 3 is an amplifying circuit circuit diagram of the present utility model; Fig. 4 is filter circuit figure of the present utility model; Fig. 5 is data storage circuitry figure of the present utility model; Fig. 6 a is the 9V power supply circuit of power-supplying circuit of the present utility model; Fig. 6 b is the 3.3V power supply circuit of power-supplying circuit of the present utility model; Fig. 7 is clock circuit of the present utility model unit figure; Fig. 8 is liquid crystal display circuit of the present utility model unit figure; Fig. 9 is keyboard circuit of the present utility model unit figure.
The specific embodiment
Below in conjunction with accompanying drawing this utility model is further described.
As shown in Figure 1, the swift electron clinical thermometer that this utility model forehead is measured comprises temperature sensor unit, amplifier circuit unit, filter circuit unit, central processing unit, clock circuit unit, liquid crystal display circuit unit, power supply power supply unit, keyboard circuit unit and memory element, wherein the temperature sensor unit of detected temperatures signal is connected in the human body forehead by lead, amplifier circuit unit carries out signal with the temperature sensor unit and is connected, and filter circuit is connected between amplifier circuit unit and the central processing unit; In central processing unit adopt 3.3V power supply low-power consumption and carry A the MSP430F449 single-chip microcomputer of D sampling and segmentation liquid crystal drive, clock chip selects for use PF8563, segmentation liquid crystal to select LSD048 for use, memory chip is selected 24LC256 for use, but the operational amplifier that relates in each analog circuit is selected the low-power consumption TLV2254 amplifier of 3.3V power supply for use; Central processing unit is connected with memory element with clock circuit unit, liquid crystal display circuit unit, keyboard circuit unit, power supply power supply unit, the digital filtering of finishing A/D sampling, data handle and unloading to the function of memorizer, also comprise the indirect control of A/D sample frequency, middle fracture interrupt function and memory chip simultaneously.
As shown in Figure 2, temperature sensor circuit adopts has the dynamic electric resistor height, the fast AD590 of response speed is as temperature sensor, adopt the 9V power voltage supply, AD590 is embedded within the heat insulation block and fully contacts with the human body forehead, and temperature sensor output signal is connected with sampling resistor by jamproof shielded conductor, and variable resistance R1 and R2 are sampling resistor as shown in Figure 2, they are converted to voltage signal with the current signal of AD590 output, are connected with back level amplifier circuit unit.
As shown in Figure 3, amplifying circuit is connected with the output signal of temperature sensor, is made up of 1 operational amplifier and peripheral 3 resistance R 3-R5, and the temperature signal that sensor unit is gathered amplifies, and operational amplifier adopts low-power consumption amplifier TLV2254.
As shown in Figure 4, filter circuit is connected with the amplifying signal of differential amplifier circuit output, form by 1 operational amplifier and peripheral 3 resistance R 6-R8 and 1 capacitor C 1, structure and preamplifying circuit are similar, adopting temperature signal is carried out Filtering Processing, but amplifier is still selected the low-power consumption TLV2254 operational amplifier of 3.3V power supply for use.
As shown in Figure 5, data storage circuitry is connected by port with central processing unit, forms by 1 E2PROM storage chip 24LC256 and peripheral 2 resistance R 15-R16 and an electrochemical capacitor C15, be used to deposit the temperature data that single-chip microcomputer is handled, call at any time to make things convenient for.
Shown in Fig. 6 a and Fig. 6 b, power-supplying circuit of the present utility model is divided into 9V and 3.3V two parts are respectively system's power supply, and 9V voltage is provided by 1 aneroid battery, is the supply voltage of temperature sensor AD 590; 3.3V voltage is the power conversion chip output signal, is analog circuit and central processor unit power supply; Being supply voltage 9V as Fig. 6 a is converted to the circuit of 5V by power conversion chip TPS7350, and it comprises that conversion chip TPS7350 and peripheral resistance R 17 and electrochemical capacitor C4 form; To be 5V voltage be converted to the circuit of 3.3V by TPS7333 to Fig. 6 b, and it comprises that conversion chip TPS7333 and peripheral resistance R 18, R19 and electrochemical capacitor C5, C6 form.
As shown in Figure 7, be the clock circuit unit, it comprises 1 clock chip PCF8563 and by 4 resistance R 91-R94,3 leaded multilayer ceramic capacitor C33-C35 and 1 crystal oscillator, is connected with the middle fracture of central processing unit by single-chip microcomputer.
As shown in Figure 8, being connected of the segmentation liquid crystal drive mouth of segmentation liquid crystal and single-chip microcomputer msp430f449, it comprises that Hour Minute Second shows, the unlatching of clock circuit module is along with the startup of device begins, and this design is mainly used in the time and probe temperature shows.
Fig. 9 is keyboard circuit unit figure, is made up of 1 resistance and 1 switch key, is connected with fracture in the central processing unit, finishes the function of man-machine interaction, the opening and closing of main finishing device and the calling function of thermometric historical data.
Claims (9)
1. the swift electron clinical thermometer measured of a forehead, it is characterized in that: comprise temperature sensor unit, amplifier circuit unit, filter circuit unit, central processing unit, clock circuit unit, liquid crystal display circuit unit, power supply power supply unit, keyboard circuit unit and memory element, described amplifier circuit unit, temperature sensor unit are connected successively with central processing unit, and described central processing unit is connected with memory element with clock circuit unit, liquid crystal display circuit unit, keyboard circuit unit, power supply power supply unit.
2. the swift electron clinical thermometer that forehead as claimed in claim 1 is measured is characterized in that: described temperature sensor unit adopts AD590 as temperature sensor.
3. the swift electron clinical thermometer that forehead as claimed in claim 1 is measured, it is characterized in that: described amplifier circuit unit is made up of 1 operational amplifier and peripheral 3 resistance, and described 1 operational amplifier and peripheral 3 resistance connect according to the connected mode of sign-changing amplifier.
4. the swift electron clinical thermometer that forehead as claimed in claim 1 is measured, it is characterized in that: described filter circuit unit is a low pass filter, it is made up of 1 operational amplifier and peripheral 3 resistance and 1 electric capacity, described 1 operational amplifier and peripheral 3 resistance connect according to the connected mode of sign-changing amplifier, and described electric capacity is connected in described inverting amplifier front end.
5. the swift electron clinical thermometer that forehead as claimed in claim 1 is measured, it is characterized in that: described central processing unit is that model is the single-chip microcomputer of MSP430F449.
6. the swift electron clinical thermometer that forehead as claimed in claim 1 is measured is characterized in that: described data storage cell adopts an E2PROM chip to be connected with central processing unit.
7. the swift electron clinical thermometer that forehead as claimed in claim 1 is measured, it is characterized in that: described clock circuit unit is made up of 1 clock chip PCF8563 and 4 resistance, 3 leaded multilayer ceramic capacitor and 1 crystal oscillator, wherein 2 leaded multilayer ceramic capacitor and crystal oscillator are formed 1, the 2 foot two ends that an oscillating circuit is connected in PCF8563, other 1 leaded multilayer ceramic capacitor links to each other with power supply by 8 feet as power filtering capacitor one end, other end ground connection, 4 signal pull-up resistors of resistance are connected to 3 feet, 5 feet, 6 feet and 7 feet of PCF8563.
8. the swift electron clinical thermometer that forehead as claimed in claim 5 is measured, it is characterized in that: described MSP430F449 single-chip microcomputer comprises a segmentation liquid crystal drive mouth, described liquid crystal display circuit unit comprises 1 segmentation liquid crystal, and described segmentation liquid crystal is connected to the MSP430F449 single-chip microcomputer by segmentation liquid crystal drive mouth.
9. the swift electron clinical thermometer that forehead as claimed in claim 1 is measured, it is characterized in that: described power supply power supply unit is divided into 9V power supply unit and 3.3V power supply unit two parts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202111453U CN201734699U (en) | 2010-06-01 | 2010-06-01 | Fast electronic clinical thermometer for forehead measurement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202111453U CN201734699U (en) | 2010-06-01 | 2010-06-01 | Fast electronic clinical thermometer for forehead measurement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201734699U true CN201734699U (en) | 2011-02-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202111453U Expired - Fee Related CN201734699U (en) | 2010-06-01 | 2010-06-01 | Fast electronic clinical thermometer for forehead measurement |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104594754A (en) * | 2015-02-09 | 2015-05-06 | 葛晓松 | Intelligent quick automatic screening system for infectious disease at public place |
| CN106525318A (en) * | 2016-12-16 | 2017-03-22 | 山东金洲科瑞节能科技有限公司 | Bus-type pressure measuring device |
-
2010
- 2010-06-01 CN CN2010202111453U patent/CN201734699U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104594754A (en) * | 2015-02-09 | 2015-05-06 | 葛晓松 | Intelligent quick automatic screening system for infectious disease at public place |
| CN106525318A (en) * | 2016-12-16 | 2017-03-22 | 山东金洲科瑞节能科技有限公司 | Bus-type pressure measuring device |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110209 Termination date: 20120601 |