CN211270826U - Stethoscope capable of measuring temperature - Google Patents
Stethoscope capable of measuring temperature Download PDFInfo
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- CN211270826U CN211270826U CN201921328443.8U CN201921328443U CN211270826U CN 211270826 U CN211270826 U CN 211270826U CN 201921328443 U CN201921328443 U CN 201921328443U CN 211270826 U CN211270826 U CN 211270826U
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Abstract
The utility model discloses a stethoscope capable of measuring temperature, which comprises a chest piece, a rubber tube and ear pieces, wherein the chest piece is provided with a temperature measuring module, the temperature measuring module comprises an infrared temperature detecting circuit, a signal amplifying circuit and a voltage stabilizing circuit which are connected in sequence, the output end of the infrared temperature detecting circuit is connected with the signal amplifying circuit, the output end of the signal amplifying circuit is connected with the input end of the voltage stabilizing circuit, the utility model adopts an infrared temperature sensor to detect the temperature of human body, in order to improve the accuracy of temperature detection, the infrared temperature detecting circuit utilizes LC filtering to carry out precise frequency selection processing on temperature signals, thereby greatly improving the accuracy of signal amplification, effectively eliminating the temperature drift interference in the operational process of the signal amplifying circuit, further improving the anti-interference performance of signals, and effectively improving the stability of microprocessor signal receiving by the voltage stabilizing circuit principle of a triode, the microprocessor calculates the human body temperature through the signal receiving value and displays the human body temperature on the electronic display screen.
Description
Technical Field
The utility model relates to a stethoscope technical field especially relates to a stethoscope that can measure temperature.
Background
The traditional stethoscope is only used for performing routine auscultation of breathing, heartbeat, bowel sounds and the like on a patient, and the temperature of the patient is usually measured as a reference for the condition of the patient in actual diagnosis, so that some stethoscopes with electronic thermometers are available on the market at present, and the temperature probe is usually arranged on the chest piece to measure the temperature of the patient in the auscultation process, so that the time and labor are saved. However, the temperature probe of the current stethoscope with the electronic thermometer is usually in a contact type, so that the measurement time is long, the temperature probe is only attached to the skin surfaces of the chest, the abdomen and the like, the influence of the external environment is large, the effect of temperature measurement in the traditional underarm and oral modes cannot be achieved, and the measurement result has large deviation.
So the utility model provides a new scheme to solve the problem.
SUMMERY OF THE UTILITY MODEL
In view of the above situation, in order to overcome the defects of the prior art, the present invention aims to provide a stethoscope capable of measuring temperature.
The technical scheme for solving the problem is as follows: a stethoscope capable of measuring temperature comprises a chest piece, a rubber tube and ear pieces, wherein a temperature measuring module is arranged on the chest piece and comprises an infrared temperature detecting circuit, a signal amplifying circuit and a voltage stabilizing circuit which are sequentially connected, the output end of the infrared temperature detecting circuit is connected with the signal amplifying circuit, and the output end of the signal amplifying circuit is connected with the input end of the voltage stabilizing circuit; the input end of the microprocessor is connected with the output end of the voltage stabilizing circuit, and the microprocessor is connected with the electronic display screen through a data bus.
Further, the infrared temperature detection circuit comprises an infrared temperature sensor J1, a power supply end of the infrared temperature sensor J1 is connected with a +5V power supply, an output end of the infrared temperature sensor J1 is connected with one end of a resistor R1 and one end of a capacitor C1, the other end of the resistor R1 is grounded with a ground end of the infrared temperature sensor J1, the other end of the capacitor C1 is connected with one end of resistors R2 and R3 and a base of a triode VT1, the other end of the resistor R2 is connected with one end of a capacitor C2, one end of an inductor L1 and the +5V power supply, the other ends of the capacitor C2 and the inductor L1 are connected with a collector of a triode VT1, an emitter of the triode VT1 is connected with one end of a capacitor C3 and a resistor R4, and the other ends of the resistors R.
Further, the signal amplification circuit comprises an operational amplifier U1, wherein a non-inverting input terminal of the operational amplifier U1 is connected with an emitter of a triode VT1, an inverting input terminal of the operational amplifier U1 is connected with one ends of a resistor R5 and a resistor R6 and a cathode of a voltage stabilizing diode DZ1, the other end of the resistor R5 is connected with a +5V power supply, the other end of the resistor R6 is connected with an anode of the voltage stabilizing diode DZ1 in parallel and grounded, and a resistor R7 is connected between the non-inverting input terminal and an output terminal of the operational amplifier U1.
Further, the voltage stabilizing circuit comprises a triode VT2, the collector of the triode VT2 is connected with the output end of the operational amplifier U1 and one end of a resistor R8 and a capacitor C4, the other end of the resistor R8 is connected with the base of the triode VT2 and the cathode of the zener diode DZ1, the other end of the capacitor C4 is connected with the anode of the zener diode DZ2 in parallel and grounded, and the emitter of the triode VT2 is connected with the input end of the microprocessor and grounded through the resistor R9.
Through the technical scheme, the beneficial effects of the utility model are that:
1. the utility model discloses a design temperature measurement module replaces contact temperature measurement among the prior art, and circuit design is simple ingenious, eliminates external environment to the interference of temperature detection greatly, adopts infrared temperature sensor can accomplish human temperature measurement fast, easy operation is convenient, and the measuring result is accurate reliable;
2. the infrared temperature detection circuit performs accurate frequency selection processing on the signals by using LC filtering, so that the influence of external clutter frequency signals on signal amplification processing is effectively avoided, and the accuracy of signal amplification is greatly improved;
3. the signal amplifying circuit effectively eliminates temperature drift interference in the operational amplification process, further improves the anti-interference performance of signals, and the voltage stabilizing circuit effectively improves the stability of microprocessor signal receiving by utilizing the principle of the triode voltage stabilizing circuit.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a block diagram of the present invention.
Fig. 3 is a schematic circuit diagram of the present invention.
Detailed Description
The foregoing and other technical matters, features and effects of the present invention will be apparent from the following detailed description of the embodiments, which is to be read in connection with the accompanying drawings 1 to 3. The structural contents mentioned in the following embodiments are all referred to the attached drawings of the specification.
Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.
As shown in figures 1 and 2, the stethoscope capable of measuring temperature comprises a chest piece 3, a rubber tube 2 and an ear piece 1, wherein a temperature measuring module is arranged on the chest piece 3 and comprises an infrared temperature detecting circuit, a signal amplifying circuit and a voltage stabilizing circuit which are sequentially connected, the output end of the infrared temperature detecting circuit is connected with the signal amplifying circuit, and the output end of the signal amplifying circuit is connected with the input end of the voltage stabilizing circuit. An electronic display screen is arranged on the upper surface of the chest piece 3, a microprocessor is embedded between the chest piece 3 and the electronic display screen, the input end of the microprocessor is connected with the output end of the voltage stabilizing circuit, and the microprocessor is connected with the electronic display screen through a data bus.
As shown in figure 3, in order to improve the accuracy of temperature detection, the infrared temperature detection circuit detects the temperature of the human body by using an infrared temperature sensor J1, an infrared temperature sensor J1 is arranged on the side wall of the chest piece 3, and a probe of the infrared temperature sensor J1 is aligned with the skin of the human body when in use. The power supply end of the infrared temperature sensor J1 is connected with a +5V power supply, the output end of the infrared temperature sensor J1 is connected with one end of a resistor R1 and a capacitor C1, the other end of the resistor R1 is grounded with the ground end of the infrared temperature sensor J1, the other end of the capacitor C1 is connected with one end of resistors R2 and R3 and the base of a triode VT1, the other end of a resistor R2 is connected with one end of a capacitor C2 and an end of an inductor L1 and the +5V power supply, the other ends of the capacitor C2 and the inductor L1 are connected with the collector of a triode VT1, the emitter of the triode VT1 is connected with one end of the capacitor C3 and the resistor R4, and the other ends of the resistors R3. The output signal of the infrared temperature sensor J1 is coupled by the capacitor C1 and then sent to the triode VT1 for amplification, LC filtering is formed by the capacitor C2 and the inductor L1 in the amplification process of the triode VT1 to carry out accurate frequency selection processing on the signal, the influence of an external clutter frequency signal on the signal amplification processing is effectively avoided, and the accuracy of the signal amplification is greatly improved.
The output signal of the transistor VT1 is further low-pass filtered by the capacitor C3 and then sent to the signal amplifying circuit for further amplification. The signal amplifying circuit comprises an operational amplifier U1, wherein the non-inverting input end of the operational amplifier U1 is connected with the emitter of a triode VT1, the inverting input end of the operational amplifier U1 is connected with one ends of a resistor R5 and a resistor R6 and the cathode of a voltage stabilizing diode DZ1, the other end of the resistor R5 is connected with a +5V power supply, the other end of the resistor R6 is connected with the anode of a voltage stabilizing diode DZ1 in parallel and grounded, and a resistor R7 is connected between the non-inverting input end and the output end of the operational amplifier U1. In order to enable the amplitude of the temperature signal to be adapted to the signal receiving allowable value of the microprocessor, the operational amplifier U1 further amplifies the output signal of the triode VT1, and the resistors R5 and R6 form compensation voltage at the inverting input end of the operational amplifier U1 by using a voltage division principle in the amplification process, so that the temperature drift value generated by the input signal of the operational amplifier can be effectively offset, and the temperature drift interference is effectively eliminated. The voltage stabilizing diode DZ1 plays a role in stabilizing and compensating voltage and ensures the effectiveness of temperature drift elimination.
And finally, an output signal of the operational amplifier U1 is stabilized by a voltage stabilizing circuit and then sent to the microprocessor, the voltage stabilizing circuit comprises a triode VT2, a collector of the triode VT2 is connected with the output end of the operational amplifier U1 and one end of a resistor R8 and a capacitor C4, the other end of the resistor R8 is connected with a base of a triode VT2 and a cathode of a zener diode DZ1, the other end of the capacitor C4 is grounded in parallel with an anode of the zener diode DZ2, and an emitter of the triode VT2 is connected with the input end of the microprocessor and is grounded through the resistor R9. The voltage stabilizing circuit utilizes the principle of the triode voltage stabilizing circuit to stabilize the output signal of the operational amplifier U1, and effectively improves the stability of signal receiving of the microprocessor.
The utility model discloses when specifically using, arrange chest piece 3 in chest or belly and carry out the auscultation, adopt non-contact's infrared temperature sensor J1 to survey human temperature simultaneously. In order to improve the accuracy of temperature detection, the infrared temperature detection circuit utilizes LC filtering to perform precise frequency selection processing on signals, so that the influence of external clutter frequency signals on signal amplification processing is effectively avoided, and the accuracy of signal amplification is greatly improved. The signal amplification circuit effectively eliminates temperature drift interference in the operational amplification process, and further improves the anti-interference performance of signals. The voltage stabilizing circuit effectively improves the stability of signal receiving of the microprocessor by utilizing the principle of the triode voltage stabilizing circuit. The microprocessor calculates the human body temperature according to the magnitude of the potential value of the output signal of the voltage stabilizing circuit, and displays the temperature on the electronic display screen for checking.
To sum up, the utility model discloses a design temperature measurement module replaces among the prior art contact temperature measurement, and circuit design is simple ingenious, greatly eliminates external environment to the interference of temperature measurement, adopts infrared temperature sensor can accomplish human temperature measurement fast, and easy operation is convenient, and measuring result is accurate reliable.
The above description is provided for further details of the present invention with reference to the specific embodiments, which should not be construed as limiting the present invention; to the utility model discloses affiliated and relevant technical field's technical personnel are based on the utility model discloses under the technical scheme thinking prerequisite, the extension of doing and the replacement of operating method, data all should fall within the utility model discloses within the protection scope.
Claims (4)
1. The utility model provides a stethoscope that can temperature measurement, includes chest piece, rubber tube and ear piece, set up temperature measurement module, its characterized in that on the chest piece: the temperature measuring module comprises an infrared temperature detecting circuit, a signal amplifying circuit and a voltage stabilizing circuit which are sequentially connected, wherein the output end of the infrared temperature detecting circuit is connected with the signal amplifying circuit, and the output end of the signal amplifying circuit is connected with the input end of the voltage stabilizing circuit;
the input end of the microprocessor is connected with the output end of the voltage stabilizing circuit, and the microprocessor is connected with the electronic display screen through a data bus.
2. The stethoscope according to claim 1, wherein: the infrared temperature detection circuit comprises an infrared temperature sensor J1, a power supply end of the infrared temperature sensor J1 is connected with a +5V power supply, an output end of the infrared temperature sensor J1 is connected with one end of a resistor R1 and one end of a capacitor C1, the other end of the resistor R1 is grounded with a grounding end of the infrared temperature sensor J1, the other end of the capacitor C1 is connected with one end of resistors R2 and R3 and a base electrode of a triode VT1, the other end of the resistor R2 is connected with one end of a capacitor C2 and an inductor L1 and the +5V power supply, the other ends of the capacitor C2 and the inductor L1 are connected with a collector electrode of a triode VT1, an emitter electrode of the triode VT1 is connected with one end of a capacitor C3 and a resistor R4, and the other end of the.
3. The stethoscope according to claim 2, wherein: the signal amplification circuit comprises an operational amplifier U1, wherein the non-inverting input end of the operational amplifier U1 is connected with the emitter of a triode VT1, the inverting input end of the operational amplifier U1 is connected with one ends of resistors R5 and R6 and the cathode of a voltage stabilizing diode DZ1, the other end of the resistor R5 is connected with a +5V power supply, the other end of the resistor R6 is grounded in parallel with the anode of a voltage stabilizing diode DZ1, and a resistor R7 is connected between the non-inverting input end and the output end of the operational amplifier U1.
4. The stethoscope according to claim 3, wherein: the voltage stabilizing circuit comprises a triode VT2, wherein the collector of the triode VT2 is connected with the output end of an operational amplifier U1, one end of a resistor R8 and one end of a capacitor C4, the other end of the resistor R8 is connected with the base of a triode VT2 and the cathode of a voltage stabilizing diode DZ1, the other end of the capacitor C4 is grounded in parallel with the anode of a voltage stabilizing diode DZ2, and the emitter of the triode VT2 is connected with the input end of a microprocessor and grounded through a resistor R9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921328443.8U CN211270826U (en) | 2019-08-15 | 2019-08-15 | Stethoscope capable of measuring temperature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921328443.8U CN211270826U (en) | 2019-08-15 | 2019-08-15 | Stethoscope capable of measuring temperature |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211270826U true CN211270826U (en) | 2020-08-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921328443.8U Active CN211270826U (en) | 2019-08-15 | 2019-08-15 | Stethoscope capable of measuring temperature |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211270826U (en) |
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2019
- 2019-08-15 CN CN201921328443.8U patent/CN211270826U/en active Active
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