CN112611476A - Temperature measurement circuit for medical equipment - Google Patents
Temperature measurement circuit for medical equipment Download PDFInfo
- Publication number
- CN112611476A CN112611476A CN202110001193.2A CN202110001193A CN112611476A CN 112611476 A CN112611476 A CN 112611476A CN 202110001193 A CN202110001193 A CN 202110001193A CN 112611476 A CN112611476 A CN 112611476A
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- resistor
- potentiometer
- circuit
- temperature measurement
- operational amplifier
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- 238000009529 body temperature measurement Methods 0.000 title claims description 32
- 230000003321 amplification Effects 0.000 claims description 14
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 14
- 230000000087 stabilizing effect Effects 0.000 claims description 5
- 238000001514 detection method Methods 0.000 abstract description 12
- 239000007788 liquid Substances 0.000 abstract description 12
- 206010067484 Adverse reaction Diseases 0.000 abstract description 9
- 230000006838 adverse reaction Effects 0.000 abstract description 9
- 230000001105 regulatory effect Effects 0.000 abstract description 6
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
- G01K7/22—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a non-linear resistance, e.g. thermistor
- G01K7/24—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a non-linear resistance, e.g. thermistor in a specially-adapted circuit, e.g. bridge circuit
Abstract
The invention relates to medical equipment, in particular to a temperature measuring circuit for medical equipment. The technical problem to be solved is as follows: provides a temperature measuring circuit for medical equipment, which can avoid adverse reaction of patients. The technical scheme of the invention is as follows: a temperature measuring circuit for medical equipment comprises a power supply circuit, a reference voltage regulating potentiometer, a reference voltage circuit and the like; and the reference voltage regulating potentiometer is connected with the input end of the reference voltage circuit. The temperature sensor can detect the temperature of the liquid of the medical equipment, converts the detected temperature into a voltage signal, inputs the voltage signal into the detection equipment through the temperature voltage input end after a series of processing, detects the voltage signal by the detection equipment, and takes corresponding measures according to the detection result to avoid the over-low temperature of the liquid, thereby avoiding the adverse reaction of a patient.
Description
Technical Field
The invention relates to medical equipment, in particular to a temperature measuring circuit for medical equipment.
Background
In a hospital, a doctor usually checks and treats a patient through medical equipment, the condition of the patient can be checked through the medical equipment, the doctor can conveniently judge the patient and adopt an effective treatment method, in the treatment process, the patient needs to be infused through the medical equipment sometimes, liquid is generally cool, the medical equipment does not have a function of heating the liquid, and adverse reactions of the patient can be caused when the cool liquid is infused into the body of the patient in cold weather.
We develop a temperature measuring circuit for medical equipment, which can avoid adverse reactions of patients, to solve the existing problems.
Disclosure of Invention
In order to overcome the defect that cold liquid is input into a patient body and adverse reaction of the patient can be caused, the technical problem to be solved is as follows: provides a temperature measuring circuit for medical equipment, which can avoid adverse reaction of patients.
The technical scheme of the invention is as follows: a temperature measurement circuit for medical equipment comprises a power supply circuit, a reference voltage adjusting potentiometer, a reference voltage circuit, a temperature measurement control circuit, a first amplifier circuit, a linear adjusting potentiometer, a temperature sensor, a second amplifier circuit, a temperature voltage input end, a zero potentiometer and an amplification factor adjusting potentiometer, wherein the reference voltage adjusting potentiometer is connected with the input end of the reference voltage circuit, the output end of the reference voltage circuit is connected with the input end of the temperature measurement control circuit, the output end of the temperature measurement control circuit is connected with the input end of the first amplifier circuit, the output end of the first amplifier circuit is connected with the linear adjusting potentiometer, the temperature sensor is connected with the input end of the temperature measurement control circuit, the output end of the temperature measurement control circuit is connected with the input end of the second amplifier circuit, and the output end of the second amplifier circuit is connected with the temperature voltage input end, the zero-setting potentiometer and the amplification factor adjusting potentiometer are connected with the input end of the second amplifier circuit, and the power supply circuit supplies power for the reference voltage adjusting potentiometer, the reference voltage circuit, the temperature measurement control circuit, the first amplifier circuit, the linear adjusting potentiometer, the temperature sensor, the second amplifier circuit, the temperature voltage input end, the zero-setting potentiometer and the amplification factor adjusting potentiometer.
Further, the reference voltage circuit comprises a resistor R1 and a zener diode D1, the resistor R1 is connected in series with the zener diode D1, the anode of the zener diode D1 is grounded, and the other end of the resistor R1 is connected with + 15V.
Further, the temperature measurement control circuit comprises a four-operational amplifier LM324, a resistor R9 and a thermistor RT1, a pin 3 of the four-operational amplifier LM324 is connected with a series connection middle point of the resistor R1 and the voltage stabilizing diode D1, a pin 4 of the four-operational amplifier LM324 is connected with +15V, pins 6, 10, 11 and 12 of the four-operational amplifier LM324 are all grounded, a pin 1 of the four-operational amplifier LM324 is connected with a resistor R9 and a thermistor RT1, the other end of the thermistor RT1 is connected with a pin 7 of the four-operational amplifier LM324, and a pin 5 of the four-operational amplifier LM324 is connected with a series connection middle point of the resistor R9 and the thermistor RT 1.
Further, the first amplifier circuit comprises a resistor R5, a resistor R6, a resistor R10, a resistor R11 and a resistor R12, the 13 pins of the four-operational amplifier LM324 are connected in series with the resistor R5 and the resistor R6, the 9 pins of the four-operational amplifier LM324 are connected with one end of the resistor R12, the 8 pins of the four-operational amplifier LM324 are connected in series with the resistor R10 and the resistor R11 respectively, the other end of the resistor R11 is connected with the 9 pins of the four-operational amplifier LM324, and the other end of the resistor R10 is connected with the 1 pin of the four-operational amplifier LM 324.
Further, the linear adjustment potentiometer is a potentiometer VR4, one end of the potentiometer VR4 is connected with the other end of the resistor R6, the input end of the potentiometer VR4 is connected with the other end of the resistor R12, and the other end of the potentiometer VR4 is grounded.
Further, the second amplifier circuit comprises a resistor R4, a resistor R7 and a resistor R8, the pins 13 of the four-operational amplifier LM324 are respectively connected in series with the resistor R4 and the resistor R8, and the pin 1 of the four-operational amplifier LM324 is connected in series with the resistor R7.
Furthermore, the zero-setting potentiometer comprises a potentiometer VR3 and a resistor R13, one end of the resistor R7 of the potentiometer VR3 is connected with the other end of the resistor R7, the other end of the resistor VR3 is connected with the resistor R13 in series and is grounded, and the input end of the potentiometer VR3 is connected with the resistor R8.
Further, the amplification factor adjusting potentiometer is a potentiometer VR2, the pin 14 of the quad operational amplifier LM324 is connected to one end of a potentiometer VR2, and the other end and the input end of the potentiometer VR2 are both connected to the other end of the resistor R4.
Further, the reference voltage regulating potentiometer comprises a resistor R2, a resistor R3 and a potentiometer VR1, wherein a pin 1 of the four-operational amplifier LM324 is connected in series with the resistor R2, the potentiometer VR1 and the resistor R3, the other end of the resistor R3 is grounded, and a pin 2 of the four-operational amplifier LM324 is connected with the input end of the potentiometer VR 1.
The beneficial effects are that:
the temperature sensor can detect the temperature of the liquid of the medical equipment, converts the detected temperature into a voltage signal, inputs the voltage signal into the detection equipment through the temperature voltage input end after a series of processing, detects the voltage signal by the detection equipment, and takes corresponding measures according to the detection result to avoid the over-low temperature of the liquid, thereby avoiding the adverse reaction of a patient.
Drawings
FIG. 1 is a block diagram of the circuit of the present invention.
Fig. 2 is a schematic circuit diagram of the present invention.
In the reference symbols: the method comprises the following steps of 1-a power supply circuit, 2-a reference voltage regulating potentiometer, 3-a reference voltage circuit, 4-a temperature measurement control circuit, 5-a first amplifier circuit, 6-a linear regulating potentiometer, 7-a temperature sensor, 8-a second amplifier circuit, 9-a temperature voltage input end, 10-a zero-setting potentiometer and 11-an amplification factor regulating potentiometer.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Example 1
A temperature measuring circuit for medical equipment is shown in figure 1 and comprises a power supply circuit 1, a reference voltage adjusting potentiometer 2, a reference voltage circuit 3, a temperature measuring control circuit 4, a first amplifier circuit 5, a linear adjusting potentiometer 6, a temperature sensor 7, a second amplifier circuit 8, a temperature voltage input end 9, a zero-setting potentiometer 10 and an amplification factor adjusting potentiometer 11, wherein the reference voltage adjusting potentiometer 2 is connected with the input end of the reference voltage circuit 3, the output end of the reference voltage circuit 3 is connected with the input end of the temperature measuring control circuit 4, the output end of the temperature measuring control circuit 4 is connected with the input end of the first amplifier circuit 5, the output end of the first amplifier circuit 5 is connected with the linear adjusting potentiometer 6, the temperature sensor 7 is connected with the input end of the temperature measuring control circuit 4, the output end of the temperature measuring control circuit 4 is connected with the input end of the second amplifier circuit 8, the output end of the second amplifier circuit 8 is connected with the temperature voltage input end 9, the zero adjustment potentiometer 10 and the amplification factor adjustment potentiometer 11 are connected with the input end of the second amplifier circuit 8, and the power supply circuit 1 supplies power for the reference voltage adjustment potentiometer 2, the reference voltage circuit 3, the temperature measurement control circuit 4, the first amplifier circuit 5, the linear adjustment potentiometer 6, the temperature sensor 7, the second amplifier circuit 8, the temperature voltage input end 9, the zero adjustment potentiometer 10 and the amplification factor adjustment potentiometer 11.
People set the reference voltage of the temperature measurement control circuit 4 through the reference voltage adjusting potentiometer 2, then make the output of the second amplifier circuit 8 zero through the zero-setting potentiometer 10, then set the amplification factor of the second amplifier circuit 8 through the amplification factor adjusting potentiometer 11, then the linear voltage of the first amplifier circuit 5 is set through the linear adjusting potentiometer 6, the temperature sensor 7 can detect the temperature of the liquid of the medical equipment, the detected voltage signals are converted into voltage signals and input into a temperature measurement control circuit 4, a first amplifier circuit 5 and a second amplifier circuit 8 amplify the voltage signals, the amplified voltage signals are input into detection equipment through a temperature voltage input end 9, the detection equipment detects the voltage signals, then corresponding measures are taken according to the detection result, the temperature of the liquid is prevented from being too low, and therefore adverse reactions of patients can be avoided.
Example 2
As shown in FIG. 2, the reference voltage circuit 3 includes a resistor R1 and a zener diode D1, the resistor R1 is connected in series with the zener diode D1, the anode of the zener diode D1 is grounded, and the other end of the resistor R1 is connected with + 15V.
The temperature measurement control circuit 4 comprises four operational amplifiers LM324, a resistor R9 and a thermistor RT1, wherein a pin 3 of the four operational amplifier LM324 is connected with a series middle point of a resistor R1 and a voltage stabilizing diode D1, a pin 4 of the four operational amplifier LM324 is connected with +15V, pins 6, 10, 11 and 12 of the four operational amplifier LM324 are all grounded, a pin 1 of the four operational amplifier LM324 is connected with a resistor R9 and a thermistor RT1, the other end of the thermistor RT1 is connected with a pin 7 of the four operational amplifier LM324, and a pin 5 of the four operational amplifier LM324 is connected with a series middle point of the resistor R9 and the thermistor RT 1.
The first amplifier circuit 5 comprises a resistor R5, a resistor R6, a resistor R10, a resistor R11 and a resistor R12, a 13-pin series resistor R5 and a resistor R6 of the four operational amplifier LM324, a 9 pin of the four operational amplifier LM324 is connected with one end of the resistor R12, 8 pins of the four operational amplifier LM324 are respectively connected with the resistor R10 and the resistor R11 in series, the other end of the resistor R11 is connected with a 9 pin of the four operational amplifier LM324, and the other end of the resistor R10 is connected with a 1 pin of the four operational amplifier LM 324.
The linear adjustment potentiometer 6 is a potentiometer VR4, one end of the potentiometer VR4 is connected with the other end of the resistor R6, the input end of the potentiometer VR4 is connected with the other end of the resistor R12, and the other end of the potentiometer VR4 is grounded.
The second amplifier circuit 8 comprises a resistor R4, a resistor R7 and a resistor R8, wherein the pins 13 of the four operational amplifiers LM324 are respectively connected with the resistor R4 and the resistor R8 in series, and the pin 1 of the four operational amplifiers LM324 is connected with the resistor R7 in series.
The zero-setting potentiometer 10 comprises a potentiometer VR3 and a resistor R13, the other end of a resistor R7 at one end of the potentiometer VR3 is connected, the other end of a resistor R13 connected in series with the potentiometer VR3 is grounded, and the input end of the potentiometer VR3 is connected with the resistor R8.
The amplification factor adjusting potentiometer 11 is a potentiometer VR2, a pin 14 of the four-operational amplifier LM324 is connected with one end of a potentiometer VR2, and the other end and the input end of the potentiometer VR2 are connected with the other end of a resistor R4.
The reference voltage adjusting potentiometer 2 comprises a resistor R2, a resistor R3 and a potentiometer VR1, a 1-pin series resistor R2, the potentiometer VR1 and a resistor R3 of the four-operational amplifier LM324, the other end of the resistor R3 is grounded, and a 2-pin of the four-operational amplifier LM324 is connected with the input end of the potentiometer VR 1.
The reference voltage of the four-operational amplifier LM324 is set by a potentiometer VR1, then the output of a resistor R4, a resistor R7 and a resistor R8 is made zero by a potentiometer VR3, the amplification times of the resistor R4, the resistor R7 and the resistor R8 are set by a potentiometer VR2, then the linear voltages of the resistor R5, the resistor R6, the resistor R10, the resistor R11 and the resistor R12 are set by a potentiometer VR4, the temperature of the liquid in the medical equipment can be detected by a thermistor RT1, the detected linear voltages are converted into voltage signals and are input into the temperature measurement control circuit 4, the voltage signals are input into the detection equipment through a temperature voltage input end 9, the detection equipment detects the voltage signals, measures are taken according to the detection result, the temperature of the liquid is prevented from being too low, so that adverse reaction of a patient can be avoided.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by the present specification, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (9)
1. A temperature measurement circuit for medical equipment is characterized in that: comprises a power supply circuit (1), a reference voltage adjusting potentiometer (2), a reference voltage circuit (3), a temperature measurement control circuit (4), a first amplifier circuit (5), a linear adjusting potentiometer (6), a temperature sensor (7), a second amplifier circuit (8), a temperature voltage input end (9), a zero adjustment potentiometer (10) and an amplification factor adjusting potentiometer (11), wherein the reference voltage adjusting potentiometer (2) is connected with the input end of the reference voltage circuit (3), the output end of the reference voltage circuit (3) is connected with the input end of the temperature measurement control circuit (4), the output end of the temperature measurement control circuit (4) is connected with the input end of the first amplifier circuit (5), the output end of the first amplifier circuit (5) is connected with the linear adjusting potentiometer (6), and the temperature sensor (7) is connected with the input end of the temperature measurement control circuit (4), the output of temperature measurement control circuit (4) is connected with the input of second amplifier circuit (8), the output and the temperature voltage input (9) of second amplifier circuit (8) are connected, zero adjustment potentiometre (10) and magnification adjust potentiometre (11) all are connected with the input of second amplifier circuit (8), power supply circuit (1) is reference voltage regulation potentiometre (2), reference voltage circuit (3), temperature measurement control circuit (4), first amplifier circuit (5), linear regulation potentiometre (6), temperature sensor (7), second amplifier circuit (8), temperature voltage input (9), zero adjustment potentiometre (10) and magnification adjust potentiometre (11) power supply.
2. The temperature measurement circuit for a medical device according to claim 1, wherein: the reference voltage circuit (3) comprises a resistor R1 and a voltage stabilizing diode D1, wherein the resistor R1 is connected with the voltage stabilizing diode D1 in series, the anode of the voltage stabilizing diode D1 is grounded, and the other end of the resistor R1 is connected with + 15V.
3. The temperature measurement circuit for a medical device according to claim 2, wherein: temperature measurement control circuit (4) are including four operational amplifier LM324, resistance R9 and thermistor RT1, 3 feet and resistance R1 and zener diode D1's the series connection intermediate point of four operational amplifier LM324 link to each other, 4 feet of four operational amplifier LM324 connect +15V, 6 feet, 10 feet, 11 feet and 12 feet of four operational amplifier LM324 all ground, 1 foot series resistance R9 and thermistor RT1 of four operational amplifier LM324, the other end and the 7 feet of four operational amplifier LM324 of thermistor RT1 are connected, 5 feet and resistance R9 and thermistor RT 1's the series connection intermediate point of four operational amplifier LM324 link to each other.
4. A temperature measurement circuit for a medical device as defined in claim 3, wherein: the first amplifier circuit (5) comprises a resistor R5, a resistor R6, a resistor R10, a resistor R11 and a resistor R12, a 13-pin series resistor R5 and a resistor R6 of the four operational amplifier LM324, a 9 pin of the four operational amplifier LM324 is connected with one end of the resistor R12, 8 pins of the four operational amplifier LM324 are respectively connected with the resistor R10 and the resistor R11 in series, the other end of the resistor R11 is connected with a 9 pin of the four operational amplifier LM324, and the other end of the resistor R10 is connected with a 1 pin of the four operational amplifier LM 324.
5. The temperature measurement circuit for a medical device according to claim 4, wherein: the linear adjustment potentiometer (6) is a potentiometer VR4, one end of a potentiometer VR4 is connected with the other end of a resistor R6, the input end of the potentiometer VR4 is connected with the other end of a resistor R12, and the other end of the potentiometer VR4 is grounded.
6. The temperature measurement circuit for a medical device according to claim 5, wherein: the second amplifier circuit (8) comprises a resistor R4, a resistor R7 and a resistor R8, wherein pins 13 of the four operational amplifiers LM324 are respectively connected with the resistor R4 and the resistor R8 in series, and pins 1 of the four operational amplifiers LM324 are connected with the resistor R7 in series.
7. The temperature measurement circuit for a medical device according to claim 6, wherein: the zero-setting potentiometer (10) comprises a potentiometer VR3 and a resistor R13, the other end of a resistor R7 at one end of the potentiometer VR3 is connected, the other end of the resistor R13 connected in series with the potentiometer VR3 is grounded, and the input end of the potentiometer VR3 is connected with the resistor R8.
8. The temperature measurement circuit for a medical device according to claim 7, wherein: the amplification factor adjusting potentiometer (11) is a potentiometer VR2, a pin 14 of the four-operational amplifier LM324 is connected with one end of a potentiometer VR2, and the other end and the input end of the potentiometer VR2 are connected with the other end of a resistor R4.
9. The temperature measurement circuit for a medical device according to claim 8, wherein: the reference voltage adjusting potentiometer (2) comprises a resistor R2, a resistor R3 and a potentiometer VR1, a 1-pin series resistor R2, the potentiometer VR1 and a resistor R3 of the four-operational amplifier LM324, the other end of the resistor R3 is grounded, and a 2-pin of the four-operational amplifier LM324 is connected with the input end of the potentiometer VR 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110001193.2A CN112611476A (en) | 2021-01-04 | 2021-01-04 | Temperature measurement circuit for medical equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110001193.2A CN112611476A (en) | 2021-01-04 | 2021-01-04 | Temperature measurement circuit for medical equipment |
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| Publication Number | Publication Date |
|---|---|
| CN112611476A true CN112611476A (en) | 2021-04-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110001193.2A Pending CN112611476A (en) | 2021-01-04 | 2021-01-04 | Temperature measurement circuit for medical equipment |
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| CN (1) | CN112611476A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113271071A (en) * | 2021-05-08 | 2021-08-17 | 陈永英 | Gynaecology and obstetrics is with baby's incubator circuit |
| CN113325899A (en) * | 2021-06-04 | 2021-08-31 | 涂国秀 | Control circuit of traditional Chinese medicine liquid heating device |
| CN113271071B (en) * | 2021-05-08 | 2024-05-14 | 南京星启南雍科技发展有限公司 | Infant incubator circuit for obstetrics and gynecology department |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6425055A (en) * | 1987-07-20 | 1989-01-27 | Kuraray Co | Ion monitoring apparatus |
| WO2001018512A1 (en) * | 1999-09-10 | 2001-03-15 | Keystone Thermometrics | A low-cost temperature sensor providing relatively high accuracy, a wide dynamic range and high linearity |
| CN105910726A (en) * | 2016-06-29 | 2016-08-31 | 江南大学 | Hardware nonlinear compensating method for platinum resistance temperature measurement |
| CN209994357U (en) * | 2019-06-14 | 2020-01-24 | 克莱门斯工业传感器南京有限公司 | Temperature measurement off tracking switch circuit |
| CN210464722U (en) * | 2019-06-24 | 2020-05-05 | 国家电网有限公司 | Temperature measuring circuit based on thermistor |
-
2021
- 2021-01-04 CN CN202110001193.2A patent/CN112611476A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6425055A (en) * | 1987-07-20 | 1989-01-27 | Kuraray Co | Ion monitoring apparatus |
| WO2001018512A1 (en) * | 1999-09-10 | 2001-03-15 | Keystone Thermometrics | A low-cost temperature sensor providing relatively high accuracy, a wide dynamic range and high linearity |
| CN105910726A (en) * | 2016-06-29 | 2016-08-31 | 江南大学 | Hardware nonlinear compensating method for platinum resistance temperature measurement |
| CN209994357U (en) * | 2019-06-14 | 2020-01-24 | 克莱门斯工业传感器南京有限公司 | Temperature measurement off tracking switch circuit |
| CN210464722U (en) * | 2019-06-24 | 2020-05-05 | 国家电网有限公司 | Temperature measuring circuit based on thermistor |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113271071A (en) * | 2021-05-08 | 2021-08-17 | 陈永英 | Gynaecology and obstetrics is with baby's incubator circuit |
| CN113271071B (en) * | 2021-05-08 | 2024-05-14 | 南京星启南雍科技发展有限公司 | Infant incubator circuit for obstetrics and gynecology department |
| CN113325899A (en) * | 2021-06-04 | 2021-08-31 | 涂国秀 | Control circuit of traditional Chinese medicine liquid heating device |
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Application publication date: 20210406 |
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