Method for calibrating measured data of distributed multi-node liquid temperature and pressure sensors
A pressure sensor and calibration method technology, applied in the field of sensors, can solve problems such as temperature drift, pressure offset, inaccurate data measurement, etc., and achieve the effects of improving measurement accuracy, solving pressure measurement errors, and having a simple structure
Active Publication Date: 2019-03-15
BEIJING HUAHANG RADIO MEASUREMENT & RES INST
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[0003] The platinum resistance temperature sensor will be affected by the parameters of the calculation model, resulting in low accuracy of the measured temperature. The ceramic pressure sensor will be affected by temperature and pressure at the same time, which will cause the measured pressure to shift and cause temperature drift; therefore, the actual temperature used Both the sensor and the pressure sensor need to be calibrated in the later stage to achieve the required measurement accuracy
[0004] In actual use, a series of sensors are generally installed at fixed intervals in the pipeline to measure the temperature and pressure of the liquid to understand the overall temperature and pressure of the pipeline. If only each sensor is calibrated individually, it will not be able to reflect the The impact of abnormal sensor data on the measurement data of sensors in the pipeline, resulting in inaccurate overall data measurement
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[0047] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, where the accompanying drawings constitute a part of the application and are used together with the embodiments of the present invention to explain the principle of the present invention.
[0048] The embodiment of the invention discloses a method for calibrating measurement data of a distributed multi-node liquid temperature and pressure sensor.
[0049] In the calibration method of this embodiment, the temperature sensor set on each node is a platinum resistance temperature monitoring sensor, and the pressure sensor is a ceramic pressure monitoring sensor.
[0050] Such as figure 1 As shown, the calibration method in the embodiment includes the following steps:
[0051] Step S101: Obtain calibrated temperature and pressure monitoring sensor data of n nodes;
[0052] In order to eliminate the problem that the temperature sensor affects the temperatur...
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The invention relates to a method for calibrating measured data of distributed multi-node liquid temperature and pressure sensors, and belongs to the technical field of sensors. The method comprises the following steps of: acquiring temperature and pressure monitoring sensor data of n nodes after calibration, carrying out validity judgment on the temperature and pressure monitoring sensor data ofeach node and compensating invalid data; and performing data smoothing on the compensated temperature and pressure data of the n nodes to obtain calibrated data. The method carries out validity judgment, data compensation and data smoothing on the calibrated measurement data of the temperature and pressure sensors distributed in a pipeline so as to integrally improve the integral precision of themonitoring data of the distributed temperature and pressure sensors in the pipeline.
Description
Technical field [0001] The invention relates to the technical field of sensors, in particular to a method for calibrating measurement data of a distributed multi-node liquid temperature and pressure sensor. Background technique [0002] The internal temperature and pressure of the liquid are important physical quantities that reflect the state of the liquid medium. In various types of industrial pipelines, temperature sensors and pressure sensor equipment located at various nodes are traditionally used to monitor the state of the liquid medium conveyed in the pipeline. In terms of temperature measurement, platinum resistance temperature sensors (PRTDs for short) are commonly used as sensitive cores to penetrate into the liquid medium. According to the Callendar-Van Dusen formula, the real-time resistance of platinum resistance is directly related to the liquid temperature; in terms of pressure measurement, a ceramic pressure sensor can be used as the sensitive core to convert th...
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IPC IPC(8): G01L27/00G01K15/00
CPCG01K15/00G01L27/00
Inventor 云峰李舒悦赵川许振丰
Owner BEIJING HUAHANG RADIO MEASUREMENT & RES INST