CN216449039U - A kind of thermometer - Google Patents
A kind of thermometer Download PDFInfo
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- CN216449039U CN216449039U CN202122773378.3U CN202122773378U CN216449039U CN 216449039 U CN216449039 U CN 216449039U CN 202122773378 U CN202122773378 U CN 202122773378U CN 216449039 U CN216449039 U CN 216449039U
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- control circuit
- electrically connected
- thermometer
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Abstract
The utility model relates to a thermometer, which comprises a control circuit, a battery circuit, an LCD circuit and a temperature measuring circuit, wherein the battery circuit, the LCD circuit and the temperature measuring circuit are all electrically connected with the control circuit, the thermometer also comprises a temperature measuring feedback circuit, the signal input end of the temperature measuring feedback circuit is electrically connected with the temperature measuring circuit and is used for detecting temperature signals, the signal output end of the temperature measuring feedback circuit is electrically connected with the control circuit and is used for feeding back the processed temperature measuring signals, and the thermometer is also used for sending enabling signals to the control circuit when the temperature measuring signals are abnormal.
Description
Technical Field
The utility model relates to a thermometer.
Background
Most of the existing electronic thermometers can not detect normal temperature values due to abnormal or damaged temperature measuring circuits, but basic temperature measuring signals can still be generated, so that the thermometers can not automatically report errors to remind users, and can directly display wrong temperature measuring values for the users.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the thermometer comprises a control circuit, a battery circuit, an LCD circuit and a temperature measuring circuit, wherein the battery circuit, the LCD circuit and the temperature measuring circuit are all electrically connected with the control circuit, the thermometer further comprises a temperature measuring feedback circuit, the signal input end of the temperature measuring feedback circuit is electrically connected with the temperature measuring circuit and is used for detecting a temperature signal, the signal output end of the temperature measuring feedback circuit is electrically connected with the control circuit and is used for feeding back the processed temperature measuring signal, and the thermometer is also used for sending an enabling signal to the control circuit when the temperature measuring signal is abnormal.
Furthermore, the control circuit adopts a singlechip.
Furthermore, the battery circuit comprises a battery, the positive electrode of the battery outputs a VCC end, the negative electrode of the battery is grounded, a voltage stabilizing capacitor is connected in parallel between the positive electrode and the negative electrode of the battery, and the battery is electrically connected with the control circuit and used for supplying power.
Furthermore, the LCD circuit specifically adopts an integrated liquid crystal display screen with 5 pin ends, one end is grounded, and the other end is electrically connected with the control circuit, and the pin ends are coupled through a resistor.
Furthermore, the temperature measuring circuit adopts an integrated sensor with three pin ends, wherein two pin ends are electrically connected with the control circuit, and one pin end is grounded.
The output end of the comparator circuit is electrically connected with the control circuit, the source electrode of the mos tube is electrically connected with at least one pin end of the temperature measurement feedback circuit and collects temperature measurement signals, the triode is used for amplifying the signals, the comparator circuit is used for comparing the amplified signals under different time sequences to determine whether the temperature measurement signals are abnormal, and an enable signal is output to the control circuit when the temperature measurement signals are abnormal.
The loudspeaker comprises a control circuit, a buzzer circuit and a key function switch circuit, wherein the buzzer circuit and the key function switch circuit are electrically connected with the control circuit, the buzzer circuit specifically adopts a pwm-modulated loudspeaker, the key function switch circuit adopts a plurality of independent key circuits, and each key circuit is electrically connected with the control circuit.
The thermometer comprises a shell, wherein a detachable sensor is arranged at the end part of the shell, threads are arranged on the periphery of one end of the detachable sensor, threads are also arranged on the inner wall of the end pipe of the shell, metal is fixedly arranged in the end pipe of the shell, and a conductive metal spring is fixedly arranged at one end of the outer side of a metal rod.
Compared with the prior art, the utility model has the beneficial effects that: the temperature measurement feedback circuit can detect a temperature signal, can send an enabling signal to the control circuit when the temperature measurement signal is abnormal, the control circuit can output a prompt signal to remind a user that the temperature measurement circuit is abnormal through the LCD circuit, and further the user can restore the temperature measurement circuit to be normal by replacing the detachable sensor when knowing that the temperature measurement circuit is abnormal, and does not need to replace the thermometer.
Drawings
Fig. 1 is a block diagram of the overall circuit composition of the present invention.
Fig. 2 is a schematic block diagram of the circuit of the present invention.
Fig. 3 is a schematic structural diagram of an embodiment of the present invention.
Detailed Description
To facilitate an understanding of the utility model, the utility model will now be described more fully with reference to the accompanying drawings. The present invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
In specific implementation, as shown in fig. 1, the thermometer of the present invention includes a control circuit, a battery circuit, an LCD circuit, a temperature measurement circuit, and a temperature measurement feedback circuit, wherein the battery circuit, the LCD circuit, and the temperature measurement circuit are all electrically connected to the control circuit, a signal input end of the temperature measurement feedback circuit is electrically connected to the temperature measurement circuit and is used for detecting a temperature signal, and a signal output end of the temperature measurement feedback circuit is electrically connected to the control circuit and is used for feeding back a processed temperature measurement signal, and is further used for sending an enable signal to the control circuit when the temperature measurement signal is abnormal; in a specific implementation, the basic temperature detection is first done by the thermometry circuit and the detection signal is displayed by the LCD circuit after being processed by the control circuit. The temperature measurement feedback circuit firstly detects that the temperature signal can send an enabling signal to the control circuit when the temperature signal is abnormal, and the control circuit can output a prompt signal through the LCD circuit to remind a user that the temperature measurement circuit is abnormal. In a specific implementation, the thermometer of the present invention, as shown in fig. 3, structurally comprises a housing 1, a detachable sensor 2 is disposed at an end of the housing 1, a thread 3 is disposed on an outer periphery of one end of the detachable sensor 2, a thread is also disposed on an inner wall of an end tube 6 of the housing 1, a metal rod 7 is fixedly disposed in the end tube 6 of the housing 1, and a conductive metal spring 5 is fixedly disposed at one end of an outer side of the metal rod 7. In implementation, the detachable sensor 2 can be fixed in the end pipe 6 or detached from the end pipe 6 through the thread 3, and when the thread 3 is fixed in the end pipe 6, the thread 3 can be abutted against the metal rod 7 through the conductive metal spring 5, so that the electrical connection from the detachable sensor 2 to the metal rod 7 is realized. The metal rod 7 of the present embodiment is connected to other circuit boards or components, and other structures in the housing 1 are the structures in the prior art and need not be disclosed. In the implementation of the utility model, when the user knows that the temperature measuring circuit is abnormal, the temperature measuring circuit can be recovered to be normal by replacing the detachable sensor 2, and the thermometer does not need to be replaced.
In specific implementation, as shown in fig. 1, the thermometer of the present invention includes a control circuit, a battery circuit, an LCD circuit, a temperature measurement circuit, and a temperature measurement feedback circuit, wherein the battery circuit, the LCD circuit, and the temperature measurement circuit are all electrically connected to the control circuit, a signal input end of the temperature measurement feedback circuit is electrically connected to the temperature measurement circuit and is used for detecting a temperature signal, and a signal output end of the temperature measurement feedback circuit is electrically connected to the control circuit and is used for feeding back a processed temperature measurement signal, and is further used for sending an enable signal to the control circuit when the temperature measurement signal is abnormal; the loudspeaker with the pwm modulation function is characterized by further comprising a buzzer circuit and a key function switch circuit which are electrically connected with the control circuit, as shown in fig. 2, the buzzer circuit specifically adopts a pwm modulation loudspeaker, the key function switch circuit adopts a plurality of independent key circuits, and each key circuit is electrically connected with the control circuit.
In a specific implementation, basic temperature detection is firstly completed by the temperature measuring circuit, and a detection signal is displayed by the LCD circuit or played by the buzzer after being processed by the control circuit. The temperature measurement feedback circuit firstly detects temperature signals and can send enabling signals to the control circuit when the temperature measurement signals are abnormal, the control circuit can output prompt information through the LCD circuit to remind a user of the abnormality of the temperature measurement circuit, or a buzzer plays prompt voice to remind the user of the abnormality of the temperature measurement circuit.
In specific implementation, as shown in fig. 2, the control circuit employs a single chip. In specific implementation, a single chip microcomputer with a better function in the prior art can be adopted, for example, a single chip microcomputer with the STC15F2k32S2 model is adopted. The battery circuit comprises a battery, wherein the positive electrode of the battery outputs a VCC end, the negative electrode of the battery is grounded, a voltage stabilizing capacitor is connected in parallel between the positive electrode and the negative electrode of the battery, and the battery is electrically connected with the control circuit and used for supplying power. The LCD circuit specifically adopts an integrated liquid crystal display screen with 5 pin ends, one end is grounded, the other end is electrically connected with the control circuit, and the pin ends are coupled through a resistor. The temperature measuring circuit adopts an integrated sensor with three pin ends, wherein two pin ends are electrically connected with the control circuit, and one pin end is grounded. In particular implementations, a sensor of a particular type, such as DS18B20, may be used. The temperature measurement feedback circuit comprises a mos tube, a triode and a comparator circuit which are connected in series, wherein the output end of the comparator circuit is electrically connected with the control circuit, the source electrode of the mos tube is electrically connected with at least one pin end of the temperature measurement feedback circuit and used for collecting temperature measurement signals, the triode is used for amplifying the signals, the comparator circuit is used for comparing the amplified signals under different time sequences to determine whether the temperature measurement signals are abnormal or not, and an enabling signal is output to the control circuit when the temperature measurement signals are abnormal. In specific implementation, the mos tube source electrode electrically collects a temperature measurement signal from a pin terminal of the temperature measurement feedback circuit, the triode amplifies the signal, the comparator circuit compares the amplified signals under different time sequences to determine whether the temperature measurement signal is abnormal or not, and outputs an enable signal to the control circuit when the temperature measurement signal is abnormal, and the control circuit can output prompt information to remind a user that the temperature measurement circuit is abnormal through the LCD circuit or play prompt voice to remind the user of the abnormality of the temperature measurement circuit through the buzzer.
All technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (8)
1. A thermometer comprises a control circuit, a battery circuit, an LCD circuit and a temperature measuring circuit, wherein the battery circuit, the LCD circuit and the temperature measuring circuit are all electrically connected with the control circuit.
2. A thermometer according to claim 1 wherein said control circuit is a single chip.
3. A thermometer according to claim 1 wherein said battery circuit comprises a battery having a positive terminal at VCC, a negative terminal at ground, and a voltage stabilizing capacitor connected in parallel between the positive and negative terminals of the battery, the battery being electrically connected to said control circuit and adapted to provide power thereto.
4. The thermometer of claim 1, wherein said LCD circuit is implemented by a 5-pin integrated liquid crystal display, one end is grounded, the other end is electrically connected to the control circuit, and the pins are coupled to each other through resistors.
5. A thermometer according to claim 1 wherein said temperature measuring circuit employs a three-legged integrated sensor wherein two of said legs are electrically connected to said control circuit and one of said legs is connected to ground.
6. The thermometer of claim 1, wherein the thermometric feedback circuit comprises a mos transistor, a transistor and a comparator circuit connected in series, the output terminal of the comparator circuit is electrically connected to the control circuit, the source of the mos transistor is electrically connected to at least one pin terminal of the thermometric feedback circuit and collects the thermometric signals, the transistor is used for amplifying the signals, the comparator circuit is used for comparing the amplified signals at different timings to determine whether the thermometric signals are abnormal, and outputting an enable signal to the control circuit when the thermometric signals are abnormal.
7. The thermometer of claim 1, further comprising a buzzer circuit electrically connected to the control circuit, the buzzer circuit particularly employing a pwm modulated speaker, and a key function switch circuit employing a plurality of separate key circuits, each of which is electrically connected to the control circuit.
8. A thermometer according to claim 1, characterized in that, the thermometer comprises a housing (1), the end of the housing (1) is provided with a detachable sensor (2), the periphery of one end of the detachable sensor (2) is provided with a screw thread (3), the inner wall of an end pipe (6) of the housing (1) is also provided with a screw thread, the end pipe (6) of the housing (1) is internally and fixedly provided with a metal rod (7), and one end of the outer side of the metal rod (7) is fixedly provided with a conductive metal spring (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122773378.3U CN216449039U (en) | 2021-11-13 | 2021-11-13 | A kind of thermometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122773378.3U CN216449039U (en) | 2021-11-13 | 2021-11-13 | A kind of thermometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216449039U true CN216449039U (en) | 2022-05-06 |
Family
ID=81354467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122773378.3U Active CN216449039U (en) | 2021-11-13 | 2021-11-13 | A kind of thermometer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216449039U (en) |
-
2021
- 2021-11-13 CN CN202122773378.3U patent/CN216449039U/en active Active
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