CN115452182A - Bridge type sensor signal conditioning circuit and method - Google Patents
Bridge type sensor signal conditioning circuit and method Download PDFInfo
- Publication number
- CN115452182A CN115452182A CN202211001898.5A CN202211001898A CN115452182A CN 115452182 A CN115452182 A CN 115452182A CN 202211001898 A CN202211001898 A CN 202211001898A CN 115452182 A CN115452182 A CN 115452182A
- Authority
- CN
- China
- Prior art keywords
- output
- signal conditioning
- temperature
- sensor signal
- bridge sensor
- 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.)
- Pending
Links
- 230000003750 conditioning effect Effects 0.000 title claims abstract description 64
- 238000000034 method Methods 0.000 title claims abstract description 12
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims abstract description 52
- 229910052697 platinum Inorganic materials 0.000 claims abstract description 26
- 230000005284 excitation Effects 0.000 claims abstract description 13
- 239000003990 capacitor Substances 0.000 claims description 11
- 238000005259 measurement Methods 0.000 claims description 5
- 230000000087 stabilizing effect Effects 0.000 claims description 5
- 238000004364 calculation method Methods 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000001143 conditioned effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
Images
Classifications
-
- 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
- G01K7/18—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 linear resistance, e.g. platinum resistance thermometer
- G01K7/20—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 linear resistance, e.g. platinum resistance thermometer in a specially-adapted circuit, e.g. bridge circuit
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Indication And Recording Devices For Special Purposes And Tariff Metering Devices (AREA)
Abstract
本发明涉及一种桥式传感器信号调理电路及方法。本发明的电路包括桥式传感器信号调理芯片U1、共模输入电阻R1和铂电阻传感器RTD，桥式传感器信号调理芯片U1的电流激励端BDR和正输入端INP连接，铂电阻传感器RTD接在桥式传感器信号调理芯片U1的正输入端INP和负输入端INM之间，共模输入电阻R1接在桥式传感器信号调理芯片U1的负输入端INM与接地端VSS之间。本发明通过外围电路及校准算法实现单芯片桥式传感器信号调理电路对铂电阻信号的调理，校准精度高。
The invention relates to a bridge sensor signal conditioning circuit and method. The circuit of the present invention includes a bridge sensor signal conditioning chip U1, a common-mode input resistance R1 and a platinum resistance sensor RTD, the current excitation terminal BDR of the bridge sensor signal conditioning chip U1 is connected to the positive input terminal INP, and the platinum resistance sensor RTD is connected to the bridge Between the positive input terminal INP and the negative input terminal INM of the sensor signal conditioning chip U1, the common mode input resistor R1 is connected between the negative input terminal INM of the bridge sensor signal conditioning chip U1 and the ground terminal VSS. The invention realizes the conditioning of the platinum resistance signal by the signal conditioning circuit of the single-chip bridge sensor through the peripheral circuit and the calibration algorithm, and the calibration precision is high.
Description
技术领域technical field
本发明涉及航空，航海和工业控制等信号通信领域，涉及一种桥式传感器信号调理电路及方法，具体涉及一种基于单芯片桥式传感器信号调理电路对铂电阻信号的新型调理方法。The invention relates to signal communication fields such as aviation, navigation and industrial control, and relates to a bridge sensor signal conditioning circuit and method, in particular to a novel conditioning method for platinum resistance signals based on a single-chip bridge sensor signal conditioning circuit.
背景技术Background technique
铂电阻测量精度高、测量范围大，应用范围极广。但由于其材料特性，阻性传感器信号传输时，输入漂移和非线性对传感器的特性造成很大误差，需要对其信号进行调理。现有的单芯片信号调理电路多用于桥式传感器，对铂电阻传感器没有对应的调理电路和调理方法，而传统铂电阻传感器调理电路多为板级电路，硬件系统复杂且影响整体精度，占用体积大，与温度传感器要求的小、低、轻趋势不符。Platinum resistance thermometer has high measurement accuracy, large measurement range and wide application range. However, due to its material characteristics, when the resistive sensor signal is transmitted, the input drift and nonlinearity will cause great errors to the characteristics of the sensor, and its signal needs to be conditioned. The existing single-chip signal conditioning circuits are mostly used for bridge sensors, and there is no corresponding conditioning circuit and conditioning method for platinum resistance sensors, while the traditional platinum resistance sensor conditioning circuits are mostly board-level circuits, the hardware system is complex and affects the overall accuracy, occupying a volume Large, inconsistent with the small, low, and light trends required by the temperature sensor.
发明内容Contents of the invention
为解决背景技术中存在的技术问题，本发明提供了一种桥式传感器信号调理电路及方法，通过外围电路及校准算法实现单芯片桥式传感器信号调理电路对铂电阻信号的调理。In order to solve the technical problems in the background technology, the present invention provides a bridge sensor signal conditioning circuit and method, which realizes the conditioning of the platinum resistance signal by the single chip bridge sensor signal conditioning circuit through peripheral circuits and calibration algorithms.
本发明的技术解决方案是：一种桥式传感器信号调理电路，其特殊之处在于：所述调理电路包括桥式传感器信号调理芯片U1、共模输入电阻R1和铂电阻传感器RTD，桥式传感器信号调理芯片U1的电流激励端BDR和正输入端INP连接，铂电阻传感器RTD接在桥式传感器信号调理芯片U1的正输入端INP和负输入端INM之间，共模输入电阻R1接在桥式传感器信号调理芯片U1的负输入端INM与接地端VSS之间。The technical solution of the present invention is: a bridge sensor signal conditioning circuit, which is special in that: the conditioning circuit includes a bridge sensor signal conditioning chip U1, a common mode input resistor R1 and a platinum resistance sensor RTD, the bridge sensor The current excitation terminal BDR of the signal conditioning chip U1 is connected to the positive input terminal INP, the platinum resistance sensor RTD is connected between the positive input terminal INP and the negative input terminal INM of the bridge sensor signal conditioning chip U1, and the common mode input resistor R1 is connected to the bridge sensor signal conditioning chip U1. Between the negative input terminal INM of the sensor signal conditioning chip U1 and the ground terminal VSS.
进一步的，调理电路还包括稳压电容C1，稳压电容C1接在桥式传感器信号调理芯片U1的供电端VDD与接地端VSS之间。Further, the conditioning circuit further includes a voltage stabilizing capacitor C1, which is connected between the power supply terminal VDD and the ground terminal VSS of the bridge sensor signal conditioning chip U1.
进一步的，调理电路还包括输出滤波电容C2,输出滤波电容C2接在桥式传感器信号调理芯片U1的输出端OUT与接地端VSS之间。Further, the conditioning circuit also includes an output filter capacitor C2, and the output filter capacitor C2 is connected between the output terminal OUT of the bridge sensor signal conditioning chip U1 and the ground terminal VSS.
进一步的，桥式传感器信号调理芯片U1包括电流源激励、增益放大器、存储单元、数模转换器DAC和内嵌温度传感器；内嵌温度传感器与存储单元连接，存储单元与数模转换器DAC连接，数模转换器DAC分别与电流源激励和增益放大器连接。Further, the bridge sensor signal conditioning chip U1 includes a current source excitation, a gain amplifier, a storage unit, a digital-to-analog converter DAC and an embedded temperature sensor; the embedded temperature sensor is connected to the storage unit, and the storage unit is connected to the digital-to-analog converter DAC , the digital-to-analog converter DAC is respectively connected with the current source excitation and the gain amplifier.
进一步的，数模转换器DAC包括输出零点调节0DAC、跨度调节FSODAC、输出零点温度系数OTCDAC和跨度温度系数FSOTCDAC，存储单元分别与输出零点调节0DAC、跨度调节FSODAC、输出零点温度系数OTCDAC和跨度温度系数FSOTCDAC连接，跨度调节FSODAC和跨度温度系数FSOTCDAC分别与电流源激励来接，输出零点调节0DAC和输出零点温度系数OTCDAC与增益放大器连接。Further, the digital-to-analog converter DAC includes an output zero adjustment 0DAC, a span adjustment FSODAC, an output zero temperature coefficient OTCDAC, and a span temperature coefficient FSOTCDAC, and the storage unit is respectively connected to an output zero adjustment 0DAC, a span adjustment FSODAC, an output zero temperature coefficient OTCDAC, and a span temperature The coefficient FSOTCDAC is connected, the span adjustment FSODAC and the span temperature coefficient FSOTCDAC are respectively connected to the current source excitation, and the output zero adjustment 0DAC and the output zero temperature coefficient OTCDAC are connected to the gain amplifier.
一种实现上述的桥式传感器信号调理电路的方法，其特殊之处在于：该方法包括以下步骤：A method for realizing the above-mentioned bridge sensor signal conditioning circuit, which is special in that: the method includes the following steps:
1)配置跨度调节FSODAC和跨度温度系数FSOTCDAC使电流源激励为铂电阻供电，铂电阻两端电位接近供电电压的二分之一；1) Configure the span adjustment FSODAC and the span temperature coefficient FSOTCDAC so that the current source is excited to supply power to the platinum resistor, and the potential at both ends of the platinum resistor is close to half of the supply voltage;
2)根据实际测量温度范围计算铂电阻阻值变化范围及输入电压范围；2) Calculate the platinum resistance resistance change range and input voltage range according to the actual measurement temperature range;
3)计算并配置增益放大器的增益倍数，计算方法为：增益＝理想输出电压范围/输入电压范围；3) Calculate and configure the gain multiple of the gain amplifier, the calculation method is: gain = ideal output voltage range/input voltage range;
4)常温下测量输出端OUT输出电压，调节输出零点温度系数OTCDAC，使输出端OUT输出电压基本符合以下条件：4) Measure the output voltage of the output terminal OUT at room temperature, adjust the output zero point temperature coefficient OTCDAC, so that the output voltage of the output terminal OUT basically meets the following conditions:
(输出端OUT输出电压-预设零点)/预设跨度＝(室温-最小温度)/(最大温度-最小温度)并记录此时输出零点温度系数OTCDAC取值，该输出零点温度系数OTCDAC在之后校准过程中保持不变；(Output terminal OUT output voltage-preset zero point)/preset span=(room temperature-minimum temperature)/(maximum temperature-minimum temperature) and record the value of the output zero temperature coefficient OTCDAC at this time, the output zero temperature coefficient OTCDAC is after remain unchanged during calibration;
5)将温度调至最低温度点，测量输出端OUT输出电压，调节输出零点调节0DAC取值使输出端OUT输出电压等于预设零点，记录对应ODAC取值；5) Adjust the temperature to the lowest temperature point, measure the output voltage of the output terminal OUT, adjust the output zero point, adjust the value of 0DAC to make the output voltage of the output terminal OUT equal to the preset zero point, and record the corresponding ODAC value;
6)将温箱温度调至最高温度点，测量输出端OUT输出电压，调节输出零点调节0DAC取值使输出端OUT输出电压等于(预设零点+跨度电压)，记录对应零点调节0DAC取值；6) Adjust the temperature of the incubator to the highest temperature point, measure the output voltage of the output terminal OUT, adjust the output zero point to adjust the 0DAC value so that the output terminal OUT output voltage is equal to (preset zero point + span voltage), and record the corresponding zero point adjustment 0DAC value;
7)将温箱温度调至室温，根据三个温度点下记录的输出零点调节0DAC数据生产补偿数据并写入存储单元中，然后在全温下进行测试验证。7) Adjust the temperature of the incubator to room temperature, adjust the ODAC data to produce compensation data according to the output zero point recorded at the three temperature points and write it into the storage unit, and then test and verify at full temperature.
铂电阻传感器由于自身材料特性存在一定的输出误差和非线性，本发明使用桥式传感器信号调理芯片对信号进行放大的同时对其非线性进行处理，对铂电阻进行恒流供电，将输入小信号放大并补偿为高精度可控的电压输出，桥式传感器信号调理芯片的内嵌温度传感器在全温范围内的每个温度点对输出进行补偿从而线性输出。因此本发明具有以下优点：通过桥式传感器信号调理芯片将信号放大，通过内嵌温度传感器及存储单元对铂电阻的非线性进行校准，校准精度高。Platinum resistance sensors have certain output errors and nonlinearity due to their own material characteristics. The present invention uses a bridge sensor signal conditioning chip to amplify the signal while processing its nonlinearity, and supplies constant current to the platinum resistance. The input small signal Amplified and compensated to a high-precision controllable voltage output, the built-in temperature sensor of the bridge sensor signal conditioning chip compensates the output at each temperature point within the full temperature range to achieve linear output. Therefore, the present invention has the following advantages: the signal is amplified by the bridge sensor signal conditioning chip, the nonlinearity of the platinum resistance is calibrated by the embedded temperature sensor and the storage unit, and the calibration accuracy is high.
附图说明Description of drawings
图1为本发明的电路图；Fig. 1 is a circuit diagram of the present invention;
图2为本发明的桥式传感器信号调理芯片的电路图。Fig. 2 is a circuit diagram of the bridge sensor signal conditioning chip of the present invention.
具体实施方式detailed description
下面结合附图和具体实施例对本发明的技术方案做进一步详细描述。The technical solutions of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
参见图1，本发明的桥式传感器信号调理电路具体实施例的结构包括桥式传感器信号调理芯片U1、共模输入电阻R1、铂电阻传感器RTD、稳压电容C1和滤波电容C2，桥式传感器信号调理芯片U1的电流激励端BDR和正输入端INP连接，铂电阻传感器RTD接在桥式传感器信号调理芯片U1的正输入端INP和负输入端INM之间，共模输入电阻R1接在桥式传感器信号调理芯片U1的负输入端INM与接地端VSS之间，稳压电容C1接在桥式传感器信号调理芯片U1的供电端VDD与接地端VSS之间,输出滤波电容C2接在桥式传感器信号调理芯片U1的输出端OUT与接地端VSS之间。Referring to Fig. 1, the structure of a specific embodiment of the bridge sensor signal conditioning circuit of the present invention includes a bridge sensor signal conditioning chip U1, a common mode input resistor R1, a platinum resistance sensor RTD, a voltage stabilizing capacitor C1 and a filter capacitor C2, the bridge sensor The current excitation terminal BDR of the signal conditioning chip U1 is connected to the positive input terminal INP, the platinum resistance sensor RTD is connected between the positive input terminal INP and the negative input terminal INM of the bridge sensor signal conditioning chip U1, and the common mode input resistor R1 is connected to the bridge sensor signal conditioning chip U1. Between the negative input terminal INM of the sensor signal conditioning chip U1 and the ground terminal VSS, the voltage stabilizing capacitor C1 is connected between the power supply terminal VDD and the ground terminal VSS of the bridge sensor signal conditioning chip U1, and the output filter capacitor C2 is connected to the bridge sensor Between the output terminal OUT of the signal conditioning chip U1 and the ground terminal VSS.
参见图2，本发明的桥式传感器信号调理芯片U1具体实施例的结构包括电流源激励、增益放大器、存储单元、数模转换器DAC和内嵌温度传感器；内嵌温度传感器与存储单元连接，存储单元与数模转换器DAC连接，数模转换器DAC分别与电流源激励和增益放大器连接，在本实施例中，数模转换器DAC包括输出零点调节0DAC、跨度调节FSODAC、输出零点温度系数OTCDAC和跨度温度系数FSOTCDAC，存储单元分别与输出零点调节0DAC、跨度调节FSODAC、输出零点温度系数OTCDAC和跨度温度系数FSOTCDAC连接，跨度调节FSODAC和跨度温度系数FSOTCDAC分别与电流源激励来接，输出零点调节0DAC和输出零点温度系数OTCDAC与增益放大器连接。Referring to Fig. 2, the structure of the specific embodiment of bridge sensor signal conditioning chip U1 of the present invention comprises current source excitation, gain amplifier, memory unit, digital-to-analog converter DAC and embedded temperature sensor; Embedded temperature sensor is connected with memory unit, The storage unit is connected to the digital-to-analog converter DAC, and the digital-to-analog converter DAC is respectively connected to the current source excitation and the gain amplifier. In this embodiment, the digital-to-analog converter DAC includes output zero adjustment 0DAC, span adjustment FSODAC, output zero temperature coefficient OTCDAC and span temperature coefficient FSOTCDAC, the storage unit is respectively connected with output zero point adjustment 0DAC, span adjustment FSODAC, output zero point temperature coefficient OTCDAC and span temperature coefficient FSOTCDAC, span adjustment FSODAC and span temperature coefficient FSOTCDAC are respectively connected with current source excitation, output zero point Adjust 0DAC and output zero temperature coefficient OTCDAC to connect with gain amplifier.
在本实施例中，桥式传感器信号调理芯片U1有两个供电端：VDD和VDDS,均外接5V电源，供电端VDDS负责给存储单元供电，供电端VDD负责给其它单元供电。In this embodiment, the bridge sensor signal conditioning chip U1 has two power supply terminals: VDD and VDDS, both of which are externally connected to a 5V power supply. The power supply terminal VDDS is responsible for supplying power to the storage unit, and the power supply terminal VDD is responsible for supplying power to other units.
本发明的桥式传感器信号调理电路的调理方法，具体包括以下步骤：The conditioning method of the bridge sensor signal conditioning circuit of the present invention specifically comprises the following steps:
1)配置跨度调节FSODAC和跨度温度系数FSOTCDAC使电流源激励为铂电阻供电，铂电阻两端电位接近供电电压的二分之一；1) Configure the span adjustment FSODAC and the span temperature coefficient FSOTCDAC so that the current source is excited to supply power to the platinum resistor, and the potential at both ends of the platinum resistor is close to half of the supply voltage;
2)根据实际测量温度范围计算铂电阻阻值变化范围及输入电压范围；2) Calculate the platinum resistance resistance change range and input voltage range according to the actual measurement temperature range;
3)计算并配置增益放大器的增益倍数，计算方法为：增益＝理想输出电压范围/输入电压范围；3) Calculate and configure the gain multiple of the gain amplifier, the calculation method is: gain = ideal output voltage range/input voltage range;
4)常温下测量输出端OUT输出电压，调节输出零点温度系数OTCDAC，使输出端OUT输出电压基本符合以下条件：4) Measure the output voltage of the output terminal OUT at room temperature, adjust the output zero point temperature coefficient OTCDAC, so that the output voltage of the output terminal OUT basically meets the following conditions:
(输出端OUT输出电压-预设零点)/预设跨度＝(室温-最小温度)/(最大温度-最小温度)并记录此时输出零点温度系数OTCDAC取值，该输出零点温度系数OTCDAC在之后校准过程中保持不变；(Output terminal OUT output voltage-preset zero point)/preset span=(room temperature-minimum temperature)/(maximum temperature-minimum temperature) and record the value of the output zero temperature coefficient OTCDAC at this time, the output zero temperature coefficient OTCDAC is after remain unchanged during calibration;
5)将温度调至最低温度点，测量输出端OUT输出电压，调节输出零点调节0DAC取值使输出端OUT输出电压等于预设零点，记录对应ODAC取值；5) Adjust the temperature to the lowest temperature point, measure the output voltage of the output terminal OUT, adjust the output zero point, adjust the value of 0DAC to make the output voltage of the output terminal OUT equal to the preset zero point, and record the corresponding ODAC value;
6)将温箱温度调至最高温度点，测量输出端OUT输出电压，调节输出零点调节0DAC取值使输出端OUT输出电压等于(预设零点+跨度电压)，记录对应零点调节0DAC取值；6) Adjust the temperature of the incubator to the highest temperature point, measure the output voltage of the output terminal OUT, adjust the output zero point to adjust the 0DAC value so that the output terminal OUT output voltage is equal to (preset zero point + span voltage), and record the corresponding zero point adjustment 0DAC value;
7)将温箱温度调至室温，根据三个温度点下记录的输出零点调节0DAC数据生产补偿数据并写入存储单元中，然后在全温下进行测试验证。7) Adjust the temperature of the incubator to room temperature, adjust the ODAC data to produce compensation data according to the output zero point recorded at the three temperature points and write it into the storage unit, and then test and verify at full temperature.
最后应说明的是：以上实施例仅用以说明本发明的技术方案，而非对其限制；尽管参照前述实施例对本发明进行了详细地说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明各实施例技术方案的精神和范围。Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be Modifications are made to the technical solutions described in the foregoing embodiments, or equivalent replacements are made to some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211001898.5A CN115452182A (en) | 2022-08-20 | 2022-08-20 | Bridge type sensor signal conditioning circuit and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211001898.5A CN115452182A (en) | 2022-08-20 | 2022-08-20 | Bridge type sensor signal conditioning circuit and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115452182A true CN115452182A (en) | 2022-12-09 |
Family
ID=84297894
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211001898.5A Pending CN115452182A (en) | 2022-08-20 | 2022-08-20 | Bridge type sensor signal conditioning circuit and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115452182A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201417184Y (en) * | 2009-04-23 | 2010-03-03 | 广东美的电器股份有限公司 | two-wire temperature transmitter |
| CN106768449A (en) * | 2017-03-13 | 2017-05-31 | 中国地震局地壳应力研究所 | A kind of digital AC electric bridge platinum resistance thermometer |
| CN108803308A (en) * | 2018-06-28 | 2018-11-13 | 吉林大学 | The mostly logical pond temperature control system of gas based on adaptive section PID control and method |
| CN109323775A (en) * | 2018-10-22 | 2019-02-12 | 安徽理工大学 | A real-time acquisition system for multi-channel temperature of CNC machine tools based on DSP |
| US20210041266A1 (en) * | 2019-08-05 | 2021-02-11 | Shenzhen GOODIX Technology Co., Ltd. | Detection circuit of bridge sensor, chip and detection system |
| CN212931741U (en) * | 2020-07-31 | 2021-04-09 | 上海一诺仪表有限公司 | Pressure transmitter |
| CN215064681U (en) * | 2021-04-21 | 2021-12-07 | 上海真兰工业自动化仪表有限公司 | Flow temperature sensor |
-
2022
- 2022-08-20 CN CN202211001898.5A patent/CN115452182A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201417184Y (en) * | 2009-04-23 | 2010-03-03 | 广东美的电器股份有限公司 | two-wire temperature transmitter |
| CN106768449A (en) * | 2017-03-13 | 2017-05-31 | 中国地震局地壳应力研究所 | A kind of digital AC electric bridge platinum resistance thermometer |
| CN108803308A (en) * | 2018-06-28 | 2018-11-13 | 吉林大学 | The mostly logical pond temperature control system of gas based on adaptive section PID control and method |
| CN109323775A (en) * | 2018-10-22 | 2019-02-12 | 安徽理工大学 | A real-time acquisition system for multi-channel temperature of CNC machine tools based on DSP |
| US20210041266A1 (en) * | 2019-08-05 | 2021-02-11 | Shenzhen GOODIX Technology Co., Ltd. | Detection circuit of bridge sensor, chip and detection system |
| CN212931741U (en) * | 2020-07-31 | 2021-04-09 | 上海一诺仪表有限公司 | Pressure transmitter |
| CN215064681U (en) * | 2021-04-21 | 2021-12-07 | 上海真兰工业自动化仪表有限公司 | Flow temperature sensor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101236113B (en) | All-bridge type piezoresistance type pressure sensor digital type signal conditioning chip | |
| EP3985368B1 (en) | Temperature measurement circuit, temperature and light intensity measurement circuit, temperature measurement method and temperature and light intensity measurement method | |
| CN103488229B (en) | A kind of automatic trimming circuit for band-gap reference | |
| US11415472B2 (en) | Flexible bridge sensor electronic architecture and method for implementing same | |
| WO2022130210A1 (en) | A temperature sensing system with thermistor | |
| CN116661546A (en) | Temperature compensation circuit and calibration method thereof | |
| CN111026220B (en) | A CMOS Hall Sensor Temperature Stability Control System | |
| CN114577378B (en) | Non-ideal factor correction system for bridge sensor | |
| CN206740279U (en) | A kind of pressure measurement circuitry | |
| CN115452182A (en) | Bridge type sensor signal conditioning circuit and method | |
| CN110737301B (en) | High-precision positive and negative adjustable current stabilization system and method based on multi-op-amp feedback loop | |
| CN116204017B (en) | A Precision Temperature Measurement and Control Device Based on Front-end AC Bridge | |
| CN113702710A (en) | Resistance test circuit and resistance test method | |
| CN206740271U (en) | A kind of temperature measuring circuit | |
| CN110412485A (en) | An output current detection circuit | |
| CN116839769A (en) | Temperature compensation hybrid integrated circuit of silicon piezoresistive pressure sensor | |
| CN116125135A (en) | Temperature self-compensating tunneling magneto-resistance current sensor, current measuring method and device | |
| CN116499631A (en) | Compensation circuit and compensation method for temperature of constant-current power supply pressure sensor | |
| CN115183918A (en) | Temperature compensation bridge balance structure suitable for MEMS pressure sensor | |
| Colucci et al. | CCII-based voltage amplifier optimization for reduced relative gain error | |
| JP2934538B2 (en) | Transducer circuit and manufacturing method thereof | |
| CN112763089A (en) | Intelligent current sensor signal conditioning method and conditioning circuit thereof | |
| WO2020059246A1 (en) | Sensor processing circuit and sensor system | |
| CN112763090B (en) | Pt temperature sensor nonlinear compensation method and circuit | |
| CN117647324B (en) | A differential proportional temperature measurement circuit and method based on bidirectional constant voltage drive |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |