A method and device for automatically compensating internal temperature parameters of a liquid level transmitter

Abstract

The present invention discloses an automatic compensation method and device for the internal temperature parameters of a liquid level transmitter, which reads the first liquid level value of the target liquid level transmitter in the container and the temperature parameter setting value of the target liquid level transmitter in the container, reads the second liquid level value of the liquid level gauge outside the container, and reads the actual temperature value in the container of the temperature sensor located in the container; judges the state of the target liquid level transmitter in the container according to the first liquid level value, the second liquid level value, the temperature parameter setting value and the actual temperature value in the container; performs calculations according to the temperature parameter setting value and the actual temperature value in the container to obtain temperature parameters for compensating the temperature parameter setting value; constructs a compensation scheme according to the state of the target liquid level transmitter in the container and the temperature parameters for compensating the temperature parameter setting value; and adjusts the target liquid level transmitter in the container according to the compensation scheme. The method saves a lot of manpower for inspection and adjustment, and effectively reduces the risk of scalding of personnel in industrial environments.

Description

Technical Field

[0001] The present invention relates to the technical field of industrial automation control, and in particular to a method and a device for automatically compensating internal temperature parameters of a liquid level transmitter. Background Art

[0002] In the water systems of the primary and secondary circuits of nuclear power plants, such as the steam converter system (STR), auxiliary feedwater system (ASG), feedwater degasser system (ADG), high-pressure feedwater heater system (AHP) and low-pressure feedwater heater system (ABP), float-type liquid level transmitters are widely used for liquid level control. This transmitter combines stable float measurement technology with advanced circuit board components, showing high accuracy and high stability in long-term operation. It consists of LVDT (Linear Variation Differential Transformer) coil, PCB (Printed Circuit Board) conversion board, float and other components. The position of the core in the LVDT coil is changed by the movement of the float caused by the change of water level, thereby outputting a voltage signal that is linearly related to the displacement. The signal is converted into a current signal by the PCB board and superimposed with the HART (Highway Addressable Remote Transducer) digital signal before being transmitted. However, in actual applications, due to environmental changes, the medium temperature does not match the initial calibration setting, which may affect the measurement accuracy, so periodic calibration and adjustment are required. The existing solution is to perform periodic inspections and manually adjust the internal temperature parameters of the liquid level transmitter. However, this method has defects such as untimely response, large workload, high safety risks, and reliance on personnel experience, which leads to low efficiency and may affect the safety and efficiency of the unit.

[0003] First, due to the limited inspection frequency and human resources of the power plant maintenance profession, the inspection work can only cover a certain period of time when the equipment is running, which makes it impossible to timely discover the false high value of the high-pressure heater liquid level measurement. In extreme cases, this may cause the high-pressure heater to be isolated due to excessively high liquid level, which in turn affects the thermal efficiency of the unit and the nuclear power of the reactor, the latter of which may exceed the upper limit for a short time. In addition, with the increase in the frequency and intensity of extreme weather, the temperature and humidity changes in the plant environment have become difficult to predict, and regular inspections are difficult to meet the timeliness requirements of temperature parameter adjustment, so that deviations cannot be eliminated in time. Secondly, power plant staff face a large workload and industrial safety risks. Although the power plant has formulated a plan for regular level transmitter parameter correction, each correction work lasts for a long time (3-7 days), and the staff works in a high temperature environment (ambient temperature 40-55℃, equipment body temperature exceeds 100℃), and there is a high risk of being scalded or accidentally touching the equipment. The circuit board housing needs to be opened during the correction process, which may reduce the service life of the equipment. At the same time, in order to make corrections, the upstream control valve needs to be set to manual operation, which increases the monitoring burden of the main control operator. The high / low pressure feedwater heater systems of the six units of the nuclear power plant have a total of 96 level transmitters that need to adjust the temperature parameters regularly, and other water systems also have similar needs. Finally, the current temperature parameter adjustment work relies on the experience of personnel, which is backward and inefficient. On-site adjustment work requires multiple attempts to achieve the desired effect, and each adjustment requires the cooperation of multiple people, including personnel in the plant and the main control room, in order to monitor and calculate the changes in readings during the adjustment process. New employees need to participate multiple times to master the details of the adjustment work, which reduces the efficiency of personnel training. Summary of the invention

[0004] The technical problem to be solved by the present invention is that, in view of at least one defect of the related technology mentioned in the above background technology: periodic inspection and manual adjustment of the internal temperature parameters of the liquid level transmitter have the defects of untimely response, large workload, high safety risk and dependence on personnel experience, a method and device for automatic compensation of the internal temperature parameters of the liquid level transmitter are provided.

[0005] The technical solution adopted by the present invention to solve the technical problem is: constructing an automatic compensation method for the internal temperature parameters of a liquid level transmitter, the method comprising the following steps:

[0006] Reading a first liquid level value of a target liquid level transmitter in the container and a temperature parameter setting value of a target liquid level transmitter in the container, reading a second liquid level value of a liquid level gauge outside the container, and reading an actual temperature value in the container from a temperature sensor in the container;

[0007] Determine the state of the target liquid level transmitter in the container according to the first liquid level value, the second liquid level value, the temperature parameter setting value and the actual temperature value in the container;

[0008] Calculating based on the temperature parameter setting value and the actual temperature value in the container to obtain a temperature parameter for compensating the temperature parameter setting value;

[0009] Constructing a compensation scheme based on the state of the target level transmitter in the container and the temperature parameter used to compensate for the set value of the temperature parameter;

[0010] The target level transmitter in the container is adjusted according to the compensation scheme.

[0011] In some embodiments, reading a first liquid level value of a target liquid level transmitter in a container and a temperature parameter setting value of the target liquid level transmitter in the container includes:

[0012] A communication request is sent to the target liquid level transmitter in the container, a communication connection is established with the target liquid level transmitter in the container, and a first liquid level value of the target liquid level transmitter in the container and a temperature parameter setting value of the target liquid level transmitter in the container are read in real time.

[0013] In some embodiments, judging the state of the target liquid level transmitter in the container according to the first liquid level value, the second liquid level value, the temperature parameter setting value and the actual temperature value in the container includes:

[0014] Determine whether the difference between the first liquid level value and the second liquid level value exceeds a first set range, and obtain a first determination result;

[0015] Determine whether the difference between the temperature parameter setting value and the actual temperature value in the container exceeds a second setting range, and obtain a second determination result;

[0016] If the first judgment result and the second judgment result are both exceeded, the state of the target liquid level transmitter in the container is that the temperature parameter is to be adjusted, and the temperature parameter of the target liquid level transmitter in the container needs to be adjusted.

[0017] In some embodiments, if the first judgment result is exceeded and the second judgment result is not exceeded, the state of the target liquid level transmitter in the container is to be repaired, and the target liquid level transmitter in the container needs to be inspected and repaired.

[0018] In some embodiments, the temperature parameter used to compensate the temperature parameter setting value is calculated based on the temperature parameter setting value and the actual temperature value in the container, including:

[0019] A temperature interval is formed according to the temperature parameter setting value and the actual temperature value in the container, and a temperature value is selected in the temperature interval at a first temperature interval for calculation to obtain a temperature parameter for compensating the temperature parameter setting value.

[0020] In some embodiments, selecting a temperature value at a first temperature interval within a temperature range for calculation to obtain a temperature parameter for compensating a temperature parameter setting value includes:

[0021] A temperature value is selected at a first temperature interval within the temperature range, and is input into the water density and steam density software for calculation, the water density and steam density at the corresponding temperature value are calculated, and the temperature parameter used to compensate for the temperature parameter setting value is obtained.

[0022] In some embodiments, the method further comprises storing a temperature parameter for compensating a temperature parameter set point.

[0023] In some embodiments, the state of the target liquid level transmitter in the container is judged according to the first liquid level value, the second liquid level value, the temperature parameter setting value and the actual temperature value in the container, which also includes: judging the validity of the first liquid level value, the second liquid level value, the temperature parameter setting value and the actual temperature value in the container, and eliminating unqualified data.

[0024] In some embodiments, a compensation scheme is constructed based on the state of the target liquid level transmitter in the container and the temperature parameter used to compensate for the set value of the temperature parameter, including:

[0025] According to the state of the target liquid level transmitter in the container and the temperature parameter used to compensate the temperature parameter setting value, the temperature intelligent analysis function is called to build a compensation plan according to the first temperature interval.

[0026] The present invention also constructs an automatic compensation device for the internal temperature parameters of the liquid level transmitter, the device comprising:

[0027] a communication unit, the communication unit being used to read a first liquid level value of a target liquid level transmitter in the container and a temperature parameter setting value of the target liquid level transmitter in the container, to read a second liquid level value of a liquid level gauge outside the container, to read an actual temperature value in the container of a temperature sensor located in the container, and to adjust the target liquid level transmitter in the container according to a compensation scheme; and

[0028] A calculation unit, wherein the calculation unit is used to determine the state of a target liquid level transmitter in the container according to the first liquid level value, the second liquid level value, the temperature parameter setting value and the actual temperature value in the container; to perform calculations according to the temperature parameter setting value and the actual temperature value in the container to obtain a temperature parameter for compensating the temperature parameter setting value; and to construct a compensation scheme according to the state of the target liquid level transmitter in the container and the temperature parameter for compensating the temperature parameter setting value.

[0029] By implementing the present invention, the following beneficial effects are achieved:

[0030] The present invention reads the first liquid level value of the target liquid level transmitter in the container and the temperature parameter setting value of the target liquid level transmitter in the container, reads the second liquid level value of the liquid level meter outside the container, and reads the actual temperature value in the container of the temperature sensor located in the container; judges the state of the target liquid level transmitter in the container according to the first liquid level value, the second liquid level value, the temperature parameter setting value and the actual temperature value in the container; performs calculations according to the temperature parameter setting value and the actual temperature value in the container to obtain temperature parameters for compensating the temperature parameter setting value; constructs a compensation scheme according to the state of the target liquid level transmitter in the container and the temperature parameters for compensating the temperature parameter setting value; and adjusts the target liquid level transmitter in the container according to the compensation scheme. The method saves manpower for inspection and adjustment by adaptively compensating for the liquid level deviation and temperature parameters of the target liquid level transmitter, and reduces the safety risks of personnel in industrial environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0032] Figure 1 A flow chart showing an embodiment of the method for automatically compensating the internal temperature parameters of the liquid level transmitter of the present invention;

[0033] Figure 2 A flow chart showing an embodiment of the automatic compensation method for internal temperature parameters of a liquid level transmitter of the present invention applied to a compensation device;

[0034] Figure 3 The flowchart of the magnetic induction sensor on the local liquid level meter in one embodiment of the automatic compensation method of the internal temperature parameter of the liquid level transmitter of the present invention is shown;

[0035] Figure 4 A flow chart showing data processing of a liquid level transmitter in an embodiment of the automatic compensation method for internal temperature parameters of a liquid level transmitter of the present invention is shown;

[0036] Figure 5 A flow chart showing data processing of a temperature sensor on a measuring cylinder in a float-type liquid level transmitter in an embodiment of the automatic compensation method for internal temperature parameters of a liquid level transmitter of the present invention is shown;

[0037] Figure 6 A flowchart showing the operation of a temperature parameter adaptive compensation device of a liquid level transmitter in an embodiment of the automatic compensation method of the internal temperature parameter of the liquid level transmitter of the present invention is shown;

[0038] Figure 7 A schematic diagram of an automatic compensation device of an embodiment of the automatic compensation device for internal temperature parameters of a liquid level transmitter of the present invention is shown;

[0039] Figure 8The structure diagram of an embodiment of the automatic compensation device for the internal temperature parameters of the liquid level transmitter of the present invention is shown. DETAILED DESCRIPTION

[0040] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, specific embodiments of the present invention are now described in detail with reference to the accompanying drawings.

[0041] It should be noted that the flowcharts shown in the accompanying drawings are only exemplary and do not necessarily include all the contents and operations / steps, nor do they have to be executed in the order described. For example, some operations / steps can be decomposed, while some operations / steps can be combined or partially combined, so the actual execution order may change according to actual conditions.

[0042] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities may be implemented in software form, or in one or more hardware modules or integrated circuits, or in different networks and / or processor devices and / or microcontroller devices.

[0043] like Figure 1 As shown, some embodiments of the present invention disclose a method for automatically compensating internal temperature parameters of a liquid level transmitter, the method comprising the following steps:

[0044] Reading a first liquid level value of a target liquid level transmitter in the container and a temperature parameter setting value of a target liquid level transmitter in the container, reading a second liquid level value of a liquid level gauge outside the container, and reading an actual temperature value in the container from a temperature sensor in the container;

[0045] Determine the state of the target liquid level transmitter in the container according to the first liquid level value, the second liquid level value, the temperature parameter setting value and the actual temperature value in the container;

[0046] Calculating based on the temperature parameter setting value and the actual temperature value in the container to obtain a temperature parameter for compensating the temperature parameter setting value;

[0047] Constructing a compensation scheme based on the state of the target level transmitter in the container and the temperature parameter used to compensate for the set value of the temperature parameter;

[0048] The target level transmitter in the container is adjusted according to the compensation scheme.

[0049] In some embodiments, the actual temperature value in the container will affect the temperature of the measuring cylinder of the target liquid level transmitter. When there are multiple liquid level transmitters in the container, the temperature at the measuring cylinder of the target liquid level transmitter that needs to be compensated is selected as the actual temperature value in the container.

[0050] In some embodiments, reading the second liquid level value of the liquid level gauge outside the container includes: reading the second liquid level value of the magnetic induction sensor in the magnetic flap liquid level gauge outside the container. In order to obtain the actual liquid level in the container and use it as a reference for parameter correction, the second liquid level value of the magnetic induction sensor in the magnetic flap liquid level gauge outside the container is read. This process involves installing a series of magnetic sensors under the magnetic flap of the magnetic flap liquid level gauge, each sensor corresponding to a specific liquid level height on the liquid level gauge. When the float in the liquid level gauge rises or falls with the change of liquid level, the magnetic beads on the magnetic flap trigger the corresponding sensors. These sensors convert the detected magnetic signals into electrical signals and send them to the communication unit through the wireless signal processing unit to realize remote reading of the liquid level value of the on-site liquid level gauge.

[0051] There is a deviation between the liquid level value measured by the level transmitter and the local level meter, which is usually caused by the deviation between the internal temperature parameters and the actual temperature in the container. This deviation will affect the accuracy of the internal water density and steam density parameters, and then affect the measurement of the liquid level value. In the internal algorithm of the level transmitter, there is a positive curve relationship between the temperature and the liquid level output value, that is, the measured liquid level value is higher when the actual temperature in the container increases, and the measured liquid level value is lower when the actual temperature in the container decreases. Therefore, by comparing the reference liquid level value provided by the magnetic flap level meter and the measured value of the level transmitter, the internal temperature parameters of the level transmitter can be corrected as necessary to improve the accuracy of the liquid level measurement.

[0052] In some embodiments, two or more local liquid level gauges are provided outside the container, and the values ​​read from the local liquid level gauges are averaged and then used as the second liquid level value of the liquid level gauge outside the container.

[0053] In some embodiments, reading a first liquid level value of a target liquid level transmitter in a container and a temperature parameter setting value of the target liquid level transmitter in the container includes:

[0054] A communication request is sent to the target liquid level transmitter in the container, a communication connection is established with the target liquid level transmitter in the container, and a first liquid level value of the target liquid level transmitter in the container and a temperature parameter setting value of the target liquid level transmitter in the container are read in real time.

[0055] In some embodiments, judging the state of the target liquid level transmitter in the container according to the first liquid level value, the second liquid level value, the temperature parameter setting value and the actual temperature value in the container includes:

[0056] Determine whether the difference between the first liquid level value and the second liquid level value exceeds a first set range, and obtain a first determination result;

[0057] Determine whether the difference between the temperature parameter setting value and the actual temperature value in the container exceeds a second setting range, and obtain a second determination result;

[0058] If the first judgment result and the second judgment result are both exceeded, the state of the target liquid level transmitter in the container is that the temperature parameter is to be adjusted, and the temperature parameter of the target liquid level transmitter in the container needs to be adjusted.

[0059] In some embodiments, if the first judgment result is exceeded and the second judgment result is not exceeded, the state of the target liquid level transmitter in the container is to be repaired, and the target liquid level transmitter in the container needs to be inspected and repaired.

[0060] In some embodiments, if the first judgment result is not exceeding and the second judgment result is exceeding or not exceeding, the state of the target liquid level transmitter in the container is normal.

[0061] In some embodiments, the temperature parameter used to compensate the temperature parameter setting value is calculated based on the temperature parameter setting value and the actual temperature value in the container, including:

[0062] A temperature interval is formed according to the temperature parameter setting value and the actual temperature value in the container, and a temperature value is selected in the temperature interval at a first temperature interval for calculation to obtain a temperature parameter for compensating the temperature parameter setting value.

[0063] In some embodiments, selecting a temperature value at a first temperature interval within a temperature range for calculation to obtain a temperature parameter for compensating a temperature parameter setting value includes:

[0064] A temperature value is selected at a first temperature interval within the temperature range, and is input into the water density and steam density software for calculation, the water density and steam density at the corresponding temperature value are calculated, and the temperature parameter used to compensate for the temperature parameter setting value is obtained.

[0065] In some embodiments, if the state of the target liquid level transmitter in the container is judged to be normal based on the first liquid level value, the second liquid level value, the temperature parameter setting value and the actual temperature value in the container, the following steps are not performed: performing calculations based on the temperature parameter setting value and the actual temperature value in the container to obtain temperature parameters for compensating the temperature parameter setting value.

[0066] In some embodiments, the method further comprises storing a temperature parameter for compensating a temperature parameter set point.

[0067] In some embodiments, the state of the target liquid level transmitter in the container is judged according to the first liquid level value, the second liquid level value, the temperature parameter setting value and the actual temperature value in the container, which also includes: judging the validity of the first liquid level value, the second liquid level value, the temperature parameter setting value and the actual temperature value in the container, and eliminating unqualified data.

[0068] In some embodiments, a compensation scheme is constructed based on the state of the target liquid level transmitter in the container and the temperature parameter used to compensate for the set value of the temperature parameter, including:

[0069] According to the state of the target liquid level transmitter in the container and the temperature parameter used to compensate the temperature parameter setting value, the temperature intelligent analysis function is called to build a compensation plan according to the first temperature interval.

[0070] The following is a specific embodiment of the automatic compensation method for the internal temperature parameters of the liquid level transmitter of the present invention:

[0071] By establishing a communication connection with the temperature sensor in the container, the magnetic sensor of the local level meter and the wireless transmission unit of the level transmitter, data is regularly acquired according to the preset acquisition cycle, including the actual temperature value in the measurement container where the level transmitter is located, the internal temperature parameter setting value of the level transmitter, the first level value output by the level transmitter, and the second level value measured by the local level meter read by the magnetic sensor. After acquiring these data, they will be analyzed for parameters in order to perform subsequent adaptive compensation and adjustment.

[0072] The following is a summary of the analysis and calculation process of adaptive compensation of liquid level deviation and temperature parameters of the liquid level transmitter:

[0073] Define variables: T1 is the actual temperature value in the measuring container where the level transmitter is located, T2 is the temperature setting value (P25) of the internal temperature parameter of the level transmitter, ΔT is the difference between T1 and T2. L1 is the measurement value of the local level meter, L2 is the output value of the level transmitter, and ΔL is the difference between L1 and L2.

[0074] Temperature parameter adjustment judgment: If |ΔT|≥15℃ and |ΔL|≥2cm, the temperature setting value (P25) of the temperature parameter needs to be adjusted. When ΔT>0, increase the temperature setting value (P25); when ΔT<0, decrease the temperature setting value (P25).

[0075] Calculate the adjustment range: A is the quotient of |ΔT| divided by the preset temperature compensation adjustment range (first temperature interval) Y, and A1 is the remainder.

[0076] Generate temperature parameter target value: a=A, generate C1 to C a+1 When ΔT>0, C1 to C a T1 plus 1 to A times Y, C a+1 C a Add A1; when ΔT<0, C1 to C a T2 minus 1 to A times Y, C a+1 C a Subtract A1 again.

[0077] Calculate water and steam density: Convert C1 to C a+1 Input water density and steam density into the software to get the corresponding water density p1 to pa+1 and corresponding steam densities q1 to q a+1 , which correspond to the water density setting value P26 and the steam density setting value P27 in the temperature parameter setting values ​​respectively, and store these parameters in the storage unit.

[0078] Parameter adjustment and monitoring: By adjusting the P25, P26, and P27 parameters of the level transmitter, monitor the output value changes. If the adjustment is unsuccessful, issue a reminder; if successful, continue monitoring. Taking the first adjustment process as an example, change the temperature parameter P25 of the target level transmitter from T2 to C1, change P26 to p1, and change P27 to q1, and take effect on these parameters, waiting for the output value of the target level transmitter to change. If it is not effective, issue a reminder; if it is effective, continue to read the next round of data for judgment.

[0079] Correction end condition: If |ΔL|≤0.5cm, the correction ends; otherwise, the correction is automatically performed every 3 minutes until the temperature setting value (P25) of the temperature parameter reaches C a+1 If |ΔT|≤5 and |ΔL|>2cm, stop the correction and remind the maintenance personnel to check for possible abnormalities.

[0080] Record the correction results: After the correction is completed, record the temperature setting value (P25), water density setting value (P26), steam density setting value (P27) and local liquid level gauge liquid level measurement value L of the last temperature parameter, and store them according to the completion time and function position code mark.

[0081] like Figure 2 As shown, the following is a specific embodiment of the automatic compensation method of the internal temperature parameter of the liquid level transmitter of the present invention applied to the compensation device:

[0082] The device first reads the first level value and temperature parameter setting value of the target level transmitter in the container, and also obtains the second level value of the level gauge outside the container and the actual temperature value recorded by the temperature sensor in the container. Then, the device will judge the validity of these data and eliminate any unqualified data points. Based on the first and second level values ​​and the temperature parameter setting value and actual temperature value, the device will judge the current state of the target level transmitter in the container. If the level or temperature parameter does not exceed the preset deviation range, the device will not perform further calculations, but generate a reminder message; if the temperature parameter needs to be adjusted, the device will use the temperature intelligent analysis function and determine the specific adjustment plan according to the preset adjustment range. Subsequently, the device will calculate the new temperature parameter target value (such as P25 / 26 / 27) for this round, and store and transmit these new values ​​to the target level transmitter so that they can take effect in the next round of data reading. The whole process is a continuous operation cycle until the level deviation reaches the preset allowable range. This flowchart shows a closed-loop control device whose purpose is to monitor and adjust the level and temperature to ensure that they always remain within the predetermined parameter range.

[0083] like Figure 3 As shown, the following is a specific embodiment of the working process of the magnetic induction sensor on the local liquid level meter in the automatic compensation method of the internal temperature parameter of the liquid level transmitter of the present invention:

[0084] The process starts with the device sending a data collection request, and then the wireless signal processing unit of the magnetic sensor on the local level meter receives the data collection requirements of the compensation device. The magnetic induction sensor will induce different current signals according to the magnetic differences of different magnetic beads. Then, the magnetic induction sensor judges and calculates these current signals to determine the corresponding liquid level values ​​and converts these values ​​into standard units. The calculated liquid level data is then transmitted to the communication unit of the device through the wireless signal processing unit. The operation unit further determines whether the first liquid level value and the second liquid level value are within the allowable range. If they are within the range, they are regarded as reliable data and assigned to the local level meter reading; if they are out of range, the data is discarded. After completing this series of steps, the magnetic induction sensor will wait for the next round of access requests for a new round of data collection and processing. The entire flowchart shows how to use magnetic induction technology to achieve accurate measurement and monitoring of liquid levels.

[0085] like Figure 4 As shown, the following is a specific embodiment of the liquid level transmitter data processing in the automatic compensation method of the internal temperature parameter of the liquid level transmitter of the present invention:

[0086] The process begins when the device issues a request for the internal parameter collection of the level transmitter. Subsequently, communication with the level transmitter is established to read the real-time level value and internal temperature parameters, such as P25, P26, P27, etc. Next, the device waits for the computing unit to generate target values ​​for temperature parameter compensation, which are the updated P25, P26, and P27 parameters. Once these parameters are generated, they will be transmitted to the level transmitter and assigned to the internal temperature parameters of the level transmitter, and confirmed at the same time. Finally, the device will wait for these parameters to take effect. If the parameters have not yet taken effect, the level transmitter will issue a reminder; if the parameters have already taken effect, the level transmitter will wait for the next round of access requests. The entire flowchart shows a closed-loop level transmitter parameter adjustment and confirmation process, which is designed to ensure that the level transmitter can perform accurate level measurements based on real-time data.

[0087] like Figure 5 As shown, the following is a specific embodiment of the data processing of the temperature sensor on the measuring cylinder in the float type liquid level transmitter in the automatic compensation method of the internal temperature parameter of the liquid level transmitter of the present invention:

[0088] The process starts with the device sending a temperature data acquisition request, and then transmits the real-time temperature value of the measuring cylinder to the communication unit of the compensation device. Next, the data is sent to the operation unit and further transmitted to the temperature measurement unit for validity verification. The verified valid temperature data is returned to the operation unit for subsequent data processing and calculation. After completing this series of steps, the temperature sensor will wait for the next round of access requests to prepare for a new round of data acquisition and processing. The entire flowchart shows a closed-loop temperature sensor data acquisition, verification and processing process, which is crucial to ensure that the float-type liquid level transmitter can accurately compensate for the effects of temperature changes when measuring liquid level.

[0089] like Figure 6 As shown, the following is a specific embodiment of the working process of the liquid level transmitter temperature parameter adaptive compensation device in the automatic compensation method of the internal temperature parameter of the liquid level transmitter of the present invention:

[0090] The process starts with the device regularly reading the measured values ​​of the level transmitter and the local level meter remotely, including the temperature of the measuring cylinder of the on-site level transmitter and the temperature parameter value set inside the transmitter. The device will then compare the deviation of the level and temperature to determine whether they both exceed the preset allowable values. If the deviation exceeds the allowable value, the device will automatically calculate the required compensation parameters and send these parameters to the target level transmitter remotely to achieve adaptive compensation.

[0091] If the initial inspection finds that the deviation does not exceed the allowable value, the device will continue to conduct a more in-depth inspection to confirm whether all relevant deviations are within the normal range. If further inspection finds that the deviation does exceed the allowable value, the device will notify the maintenance personnel to check the key components of the level transmitter, such as LVDT (Linear Variable Differential Transformer) and PCB (Printed Circuit Board) board or wiring, to determine whether there is an abnormality. If subsequent inspections confirm that the deviation is still exceeded, the device will stop the parameter correction process.

[0092] At any stage of the process, if the deviation is found to be within the allowable value, the device will return to the initial step of periodically reading data, forming a closed-loop monitoring and adjustment mechanism. This automated monitoring and compensation system is designed to ensure that the level transmitter can provide accurate level measurement in the face of temperature changes, and to quickly notify maintenance personnel to perform necessary inspections and maintenance when problems are detected to ensure stable operation of the system.

[0093] In some embodiments, in order to improve the stability of equipment in industrial processes and achieve high-precision control, a physical liquid level transmitter temperature parameter adaptive compensation device can be installed near the site of the liquid level transmitter. This device can regularly read the measured values ​​of the liquid level transmitter and the local liquid level meter remotely, including the temperature of the measuring cylinder and the temperature parameter value set inside the transmitter, and automatically perform deviation analysis and calculate and issue compensation parameters to ensure the accuracy of liquid level measurement. In addition to the solution of using this physical device, there are other innovative methods to achieve the same purpose. For example, a robot that integrates liquid level and temperature measurement and parameter intelligent calculation functions can be designed. Such a robot can autonomously collect, analyze and adjust data to improve the automation of the system. Alternatively, a new type of liquid level transmitter can be developed with a built-in parameter automatic compensation function that can self-adjust to temperature changes based on real-time data, thereby reducing the need for manual intervention. These alternatives can provide high integration and high flexibility, making liquid level measurement and control more accurate and reliable. By reducing dependence on manual monitoring and maintenance, these methods help reduce operation and maintenance costs and improve the efficiency and economic benefits of the entire system. Whether it is a physical compensation device, an intelligent robot or a new adaptive level transmitter, the core goal is to optimize the monitoring and control of industrial processes through technological advances to ensure the continuity and safety of the production process.

[0094] In some embodiments, the liquid level transmitter temperature parameter adaptive compensation device and the method used are not limited to the precise control of liquid level measurement, but also have wide applicability. It is also applicable to a variety of intelligent sensors and transmitters in field equipment that need to adjust internal parameters from time to time, especially those that support HART (Highway Addressable Remote Transducer) protocol for communication. HART protocol is a two-way digital communication protocol for industrial automation, which allows users to communicate digitally through a standard 4-20mA analog signal line to achieve remote configuration, monitoring and fault diagnosis.

[0095] By applying this method, other types of intelligent transmitters, such as pressure transmitters, temperature sensors, gas concentration monitors, etc., can also achieve automatic adjustment and optimization of internal parameters. This means that no matter whether the field equipment is facing temperature fluctuations, pressure changes or uncertainty in gas concentration, this system can provide the necessary compensation to ensure the accuracy and reliability of the measured data. This flexibility and scalability makes the compensation device a valuable tool in the field of industrial automation and process control, helping to improve the stability and efficiency of the entire system while reducing maintenance costs and potential risks caused by parameter deviations.

[0096] like Figure 7 and Figure 8 As shown, some embodiments of the present invention also disclose an automatic compensation device for internal temperature parameters of a liquid level transmitter, the device comprising:

[0097] a communication unit, the communication unit being used to read a first liquid level value of a target liquid level transmitter in the container and a temperature parameter setting value of the target liquid level transmitter in the container, to read a second liquid level value of a liquid level gauge outside the container, to read an actual temperature value in the container of a temperature sensor located in the container, and to adjust the target liquid level transmitter in the container according to a compensation scheme; and,

[0098] The operation unit is used to determine the state of the target liquid level transmitter in the container according to the first liquid level value, the second liquid level value, the temperature parameter setting value and the actual temperature value in the container; to perform operations according to the temperature parameter setting value and the actual temperature value in the container to obtain a temperature parameter for compensating the temperature parameter setting value; and to construct a compensation scheme according to the state of the target liquid level transmitter in the container and the temperature parameter for compensating the temperature parameter setting value.

[0099] In some embodiments, the actual temperature value in the container will affect the temperature of the measuring cylinder of the target liquid level transmitter. When there are multiple liquid level transmitters in the container, the temperature at the measuring cylinder of the target liquid level transmitter that needs to be compensated is selected as the actual temperature value in the container.

[0100] In some embodiments, reading the second liquid level value of the liquid level gauge outside the container includes: reading the second liquid level value of the magnetic induction sensor in the magnetic flap liquid level gauge outside the container. In order to obtain the actual liquid level in the container and use it as a reference for parameter correction, the second liquid level value of the magnetic induction sensor in the magnetic flap liquid level gauge outside the container is read. This process involves installing a series of magnetic sensors under the magnetic flap of the magnetic flap liquid level gauge, each sensor corresponding to a specific liquid level height on the liquid level gauge. When the float in the liquid level gauge rises or falls with the change of liquid level, the magnetic beads on the magnetic flap trigger the corresponding sensors. These sensors convert the detected magnetic signals into electrical signals and send them to the communication unit through the wireless signal processing unit to realize remote reading of the liquid level value of the on-site liquid level gauge.

[0101] There is a deviation between the liquid level value measured by the level transmitter and the local level meter, which is usually caused by the deviation between the internal temperature parameters and the actual temperature in the container. This deviation will affect the accuracy of the internal water density and steam density parameters, and then affect the measurement of the liquid level value. In the internal algorithm of the level transmitter, there is a positive curve relationship between the temperature and the liquid level output value, that is, the measured liquid level value is higher when the actual temperature in the container increases, and the measured liquid level value is lower when the actual temperature in the container decreases. Therefore, by comparing the reference liquid level value provided by the magnetic flap level meter and the measured value of the level transmitter, the internal temperature parameters of the level transmitter can be corrected as necessary to improve the accuracy of the liquid level measurement.

[0102] In some embodiments, two or more local liquid level gauges are provided outside the container, and the values ​​of the local liquid level gauges read by the communication unit are averaged by the calculation unit and then used as the second liquid level value of the liquid level gauge outside the container.

[0103] In some embodiments, reading a first liquid level value of a target liquid level transmitter in a container and a temperature parameter setting value of the target liquid level transmitter in the container includes:

[0104] A communication request is sent to the target liquid level transmitter in the container, a communication connection is established with the target liquid level transmitter in the container, and a first liquid level value of the target liquid level transmitter in the container and a temperature parameter setting value of the target liquid level transmitter in the container are read in real time.

[0105] In some embodiments, judging the state of the target liquid level transmitter in the container according to the first liquid level value, the second liquid level value, the temperature parameter setting value and the actual temperature value in the container includes:

[0106] Determine whether the difference between the first liquid level value and the second liquid level value exceeds a first set range, and obtain a first determination result;

[0107] Determine whether the difference between the temperature parameter setting value and the actual temperature value in the container exceeds a second setting range, and obtain a second determination result;

[0108] If both the first judgment result and the second judgment result exceed, the operation unit judges that the state of the target liquid level transmitter in the container is that the temperature parameter needs to be adjusted, and the temperature parameter of the target liquid level transmitter in the container needs to be adjusted.

[0109] In some embodiments, if the first judgment result is exceeded and the second judgment result is not exceeded, the operation unit determines that the state of the target liquid level transmitter in the container is to be repaired, and the target liquid level transmitter in the container needs to be inspected and repaired.

[0110] In some embodiments, if the first judgment result is not exceeding and the second judgment result is exceeding or not exceeding, the operation unit judges that the state of the target liquid level transmitter in the container is normal.

[0111] In some embodiments, the temperature parameter used to compensate the temperature parameter setting value is calculated based on the temperature parameter setting value and the actual temperature value in the container, including:

[0112] A temperature interval is formed according to the temperature parameter setting value and the actual temperature value in the container, and a temperature value is selected in the temperature interval at a first temperature interval for calculation to obtain a temperature parameter for compensating the temperature parameter setting value.

[0113] In some embodiments, selecting a temperature value at a first temperature interval within a temperature range for calculation to obtain a temperature parameter for compensating a temperature parameter setting value includes:

[0114] A temperature value is selected at a first temperature interval within the temperature range, and is input into the water density and steam density software in the operation unit for calculation, the water density and steam density at the corresponding temperature value are calculated, and the temperature parameter for compensating the temperature parameter setting value is obtained.

[0115] In some embodiments, if the operation unit determines that the state of the target liquid level transmitter in the container is normal based on the first liquid level value, the second liquid level value, the temperature parameter setting value and the actual temperature value in the container, the operation unit does not perform the following steps: performing operations based on the temperature parameter setting value and the actual temperature value in the container to obtain temperature parameters for compensating the temperature parameter setting value.

[0116] In some embodiments, the device further includes: a storage unit, the storage unit is used to store temperature parameters, and the temperature parameters are used to compensate for temperature parameter set values.

[0117] The storage unit is also used to save the historical data generated by the operation unit during each adjustment process. These data are not only crucial to the long-term operation of the device, but also convenient for users to export and analyze.

[0118] In some embodiments, the state of the target liquid level transmitter in the container is judged according to the first liquid level value, the second liquid level value, the temperature parameter setting value and the actual temperature value in the container, which also includes: the operation unit judges the validity of the first liquid level value, the second liquid level value, the temperature parameter setting value and the actual temperature value in the container, and eliminates unqualified data.

[0119] In some embodiments, a compensation scheme is constructed based on the state of the target liquid level transmitter in the container and the temperature parameter used to compensate for the set value of the temperature parameter, including:

[0120] According to the state of the target liquid level transmitter in the container and the temperature parameter used to compensate the temperature parameter setting value, the temperature intelligent analysis function is called to build a compensation plan according to the first temperature interval.

[0121] In some embodiments, the automatic compensation device for the internal temperature parameters of the liquid level transmitter is composed of six core units to ensure the efficient and accurate operation of the liquid level transmitter. The six units include a communication unit, a computing unit, a temperature measurement unit, a storage unit, a power supply unit, and a protection unit. In addition, the device also needs to cooperate with a magnetic induction sensor and a wireless signal processing unit to realize the data collection of the local liquid level meter.

[0122] The communication unit is used to interact with the outside world, and includes a wireless module and a HART protocol parsing module, so that the device can establish communication with the temperature sensor on the measuring cylinder, the wireless signal processing unit on the local level meter, and the level transmitter, and realize two-way transmission of data.

[0123] The temperature measurement unit is used to collect the ambient temperature on site. These data are not only used for the self-protection of the device, such as participating in the work of the protection unit, but also used to analyze the temperature data of the transmitter measuring tube obtained from the temperature sensor to ensure the accuracy of the measurement.

[0124] The power supply unit is used to provide a stable power supply for the device and supports 220VAC power supply to ensure that the device can work stably for a long time.

[0125] The protection unit is used to monitor the safety status of the device, including overheating, data security, data flow and overcurrent, to prevent device damage and ensure the stable operation of the entire system.

[0126] The calculation unit is used to judge the validity and calculate the parameters of the collected data. The built-in water density and steam density parameter software enables the calculation unit to compare data and issue early warning reminders, and achieve precise adjustment of temperature parameters, thereby ensuring the accuracy of liquid level measurement.

[0127] The following is a specific embodiment of the automatic compensation device for the internal temperature parameters of the liquid level transmitter of the present invention:

[0128] The communication unit establishes communication connections with the temperature sensor in the container, the magnetic sensor of the local level meter, and the wireless transmission unit of the level transmitter, and regularly obtains data according to the preset collection cycle, including the actual temperature value in the measurement container where the level transmitter is located, the internal temperature parameter setting value of the level transmitter, the first level value output by the level transmitter, and the second level value measured by the local level meter read by the magnetic sensor. After obtaining these data, the operation unit will perform parameter analysis on them for subsequent adaptive compensation and adjustment.

[0129] The following is a summary of the analysis and calculation process of adaptive compensation of liquid level deviation and temperature parameters of the liquid level transmitter:

[0130] Define variables: T1 is the actual temperature value in the measuring container where the level transmitter is located, T2 is the temperature setting value (P25) of the internal temperature parameter of the level transmitter, ΔT is the difference between T1 and T2. L1 is the measurement value of the local level meter, L2 is the output value of the level transmitter, and ΔL is the difference between L1 and L2.

[0131] Temperature parameter adjustment judgment: If |ΔT|≥15℃ and |ΔL|≥2cm, the automatic compensation device needs to adjust the temperature setting value (P25) of the target liquid level transmitter temperature parameter. When ΔT>0, increase the temperature setting value (P25), and when ΔT<0, decrease the temperature setting value (P25).

[0132] Calculate the adjustment range: A is the quotient of |ΔT| divided by the preset temperature compensation adjustment range (first temperature interval) Y, and A1 is the remainder.

[0133] Generate temperature parameter target value: a=A, the calculation unit generates C1 to C a+1 When ΔT>0, C1 to C a T1 plus 1 to A times Y, C a+1 C a Add A1; when ΔT<0, C1 to C a T2 minus 1 to A times Y, C a+1 C a Subtract A1 again.

[0134] Calculate water and steam density: The calculation unit converts C1 to C a+1 Input water density and steam density into the software to get the corresponding water density p1 to p a+1 and corresponding steam densities q1 to q a+1 , which correspond to the water density setting value P26 and the steam density setting value P27 in the temperature parameter setting values ​​respectively, and store these parameters in the storage unit.

[0135] Parameter adjustment and monitoring: The automatic compensation device monitors the output value changes by adjusting the P25, P26, and P27 parameters of the target liquid level transmitter. If the adjustment is unsuccessful, a reminder is issued; if successful, monitoring continues. Taking the first adjustment process as an example, the temperature parameter P25 of the target liquid level transmitter is changed from T2 to C1, P26 is changed to p1, and P27 is changed to q1, and these parameters are activated, waiting for the output value of the target liquid level transmitter to change. If it is not activated successfully, a reminder is issued. If it is activated successfully, the next round of data is read for judgment.

[0136] Correction end condition: If |ΔL|≤0.5cm, the correction ends; otherwise, the automatic compensation device automatically corrects every 3 minutes until the temperature setting value (P25) of the temperature parameter reaches C a+1 If |ΔT|≤5 and |ΔL|>2cm, stop the correction and remind the maintenance personnel to check for possible abnormalities.

[0137] Record correction results: After the correction is completed, the automatic compensation device records the temperature setting value (P25), water density setting value (P26), steam density setting value (P27) and the liquid level measurement value L of the local liquid level gauge of the last temperature parameter, and stores them according to the completion time and function position code mark.

[0138] like Figure 2 As shown, the following is a specific embodiment of the automatic compensation method of the internal temperature parameter of the liquid level transmitter of the present invention applied to the automatic compensation device:

[0139] The device first reads the first level value and temperature parameter setting value of the target level transmitter in the container, and also obtains the second level value of the level gauge outside the container and the actual temperature value recorded by the temperature sensor in the container. Then, the device will judge the validity of these data and eliminate any unqualified data points. Based on the first and second level values ​​and the temperature parameter setting value and actual temperature value, the device will judge the current state of the target level transmitter in the container. If the level or temperature parameter does not exceed the preset deviation range, the device will not perform further calculations, but generate a reminder message; if the temperature parameter needs to be adjusted, the device will use the temperature intelligent analysis function and determine the specific adjustment plan according to the preset adjustment range. Subsequently, the device will calculate the new temperature parameter target value (such as P25 / 26 / 27) for this round, and store and transmit these new values ​​to the target level transmitter so that they can take effect in the next round of data reading. The whole process is a continuous operation cycle until the level deviation reaches the preset allowable range. This flowchart shows a closed-loop control device whose purpose is to monitor and adjust the level and temperature to ensure that they always remain within the predetermined parameter range.

[0140] like Figure 3As shown, the following is a specific embodiment of the working process of the magnetic induction sensor on the local liquid level meter in the automatic compensation device for the internal temperature parameters of the liquid level transmitter of the present invention:

[0141] The process starts with the device sending a data collection request, and then the wireless signal processing unit of the magnetic sensor on the local level meter receives the data collection requirements of the compensation device. The magnetic induction sensor will induce different current signals according to the magnetic differences of different magnetic beads. Then, the magnetic induction sensor judges and calculates these current signals to determine the corresponding liquid level values ​​and converts these values ​​into standard units. The calculated liquid level data is then transmitted to the communication unit of the device through the wireless signal processing unit. The operation unit further determines whether the first liquid level value and the second liquid level value are within the allowable range. If they are within the range, they are regarded as reliable data and assigned to the local level meter reading; if they are out of range, the data is discarded. After completing this series of steps, the magnetic induction sensor will wait for the next round of access requests for a new round of data collection and processing. The entire flowchart shows how to use magnetic induction technology to achieve accurate measurement and monitoring of liquid levels.

[0142] like Figure 4 As shown, the following is a specific embodiment of the data processing of the liquid level transmitter in the automatic compensation device for the internal temperature parameters of the liquid level transmitter of the present invention:

[0143] The process begins when the device issues a request for the internal parameter collection of the level transmitter. Subsequently, the device establishes a communication connection with the level transmitter to read the real-time level value and internal temperature parameters, such as P25, P26, P27, etc. Next, the device waits for the computing unit to generate target values ​​for temperature parameter compensation, which are the updated P25, P26, and P27 parameters. Once these parameters are generated, they will be transmitted to the level transmitter and assigned to the internal temperature parameters of the level transmitter, and confirmed at the same time. Finally, the device will wait for these parameters to take effect. If the parameters have not yet taken effect, the level transmitter will issue a reminder; if the parameters have already taken effect, the level transmitter will wait for the next round of access requests. The entire flowchart shows a closed-loop level transmitter parameter adjustment and confirmation process, which is designed to ensure that the level transmitter can perform accurate level measurements based on real-time data.

[0144] like Figure 5 As shown, the following is a specific embodiment of the data processing of the temperature sensor on the measuring cylinder in the float type liquid level transmitter in the automatic compensation device for the internal temperature parameters of the liquid level transmitter of the present invention:

[0145] The process starts with the device sending a temperature data acquisition request, and then transmits the real-time temperature value of the measuring cylinder to the communication unit of the compensation device. Next, the data is sent to the operation unit and further transmitted to the temperature measurement unit for validity verification. The verified valid temperature data is returned to the operation unit for subsequent data processing and calculation. After completing this series of steps, the temperature sensor will wait for the next round of access requests to prepare for a new round of data acquisition and processing. The entire flowchart shows a closed-loop temperature sensor data acquisition, verification and processing process, which is crucial to ensure that the float-type liquid level transmitter can accurately compensate for the effects of temperature changes when measuring liquid level.

[0146] like Figure 6 As shown, the following is a specific embodiment of the working process of the liquid level transmitter temperature parameter adaptive compensation device in the automatic compensation device for the internal temperature parameter of the liquid level transmitter of the present invention:

[0147] The process starts with the device regularly reading the measured values ​​of the level transmitter and the local level meter remotely, including the temperature of the measuring cylinder of the on-site level transmitter and the temperature parameter value set inside the transmitter. The device will then compare the deviation of the level and temperature to determine whether they both exceed the preset allowable values. If the deviation exceeds the allowable value, the device will automatically calculate the required compensation parameters and send these parameters to the target level transmitter remotely to achieve adaptive compensation.

[0148] If the initial inspection finds that the deviation does not exceed the allowable value, the device will continue to conduct a more in-depth inspection to confirm whether all relevant deviations are within the normal range. If further inspection finds that the deviation does exceed the allowable value, the device will notify the maintenance personnel to check the key components of the level transmitter, such as LVDT (Linear Variable Differential Transformer) and PCB (Printed Circuit Board) board or wiring, to determine whether there is an abnormality. If subsequent inspections confirm that the deviation is still exceeded, the device will stop the parameter correction process.

[0149] At any stage of the process, if the deviation is found to be within the allowable value, the device will return to the initial step of periodically reading data, forming a closed-loop monitoring and adjustment mechanism. This automated monitoring and compensation system is designed to ensure that the level transmitter can provide accurate level measurement in the face of temperature changes, and to quickly notify maintenance personnel to perform necessary inspections and maintenance when problems are detected to ensure stable operation of the system.

[0150] In some embodiments, in order to improve the stability of equipment in industrial processes and achieve high-precision control, a physical liquid level transmitter temperature parameter adaptive compensation device can be installed near the site of the liquid level transmitter. This device can regularly read the measured values ​​of the liquid level transmitter and the local liquid level meter remotely, including the temperature of the measuring cylinder and the temperature parameter value set inside the transmitter, and automatically perform deviation analysis and calculate and issue compensation parameters to ensure the accuracy of liquid level measurement. In addition to the solution of using this physical device, there are other innovative methods to achieve the same purpose. For example, a robot that integrates liquid level and temperature measurement and parameter intelligent calculation functions can be designed. Such a robot can autonomously collect, analyze and adjust data to improve the automation of the system. Alternatively, a new type of liquid level transmitter can be developed with a built-in parameter automatic compensation function that can self-adjust to temperature changes based on real-time data, thereby reducing the need for manual intervention. These alternatives can provide high integration and high flexibility, making liquid level measurement and control more accurate and reliable. By reducing dependence on manual monitoring and maintenance, these methods help reduce operation and maintenance costs and improve the efficiency and economic benefits of the entire system. Whether it is a physical compensation device, an intelligent robot or a new adaptive level transmitter, the core goal is to optimize the monitoring and control of industrial processes through technological advances to ensure the continuity and safety of the production process.

[0151] In some embodiments, the liquid level transmitter temperature parameter adaptive compensation device and the method used are not limited to the precise control of liquid level measurement, but also have wide applicability. It is also applicable to a variety of intelligent sensors and transmitters in field equipment that need to adjust internal parameters from time to time, especially those that support HART (Highway Addressable Remote Transducer) protocol for communication. HART protocol is a two-way digital communication protocol for industrial automation, which allows users to communicate digitally through a standard 4-20mA analog signal line to achieve remote configuration, monitoring and fault diagnosis.

[0152] By applying this method, other types of intelligent transmitters, such as pressure transmitters, temperature sensors, gas concentration monitors, etc., can also achieve automatic adjustment and optimization of internal parameters. This means that no matter whether the field equipment is facing temperature fluctuations, pressure changes or uncertainty in gas concentration, this system can provide the necessary compensation to ensure the accuracy and reliability of the measured data. This flexibility and scalability makes the compensation device a valuable tool in the field of industrial automation and process control, helping to improve the stability and efficiency of the entire system while reducing maintenance costs and potential risks caused by parameter deviations.

[0153] By implementing the present invention, the following beneficial effects are achieved: This method not only improves the level of industrial automation, but also significantly reduces safety risks by realizing adaptive compensation for the liquid level deviation and temperature parameters of the liquid level transmitter. This method can automatically monitor and adjust the parameters of the liquid level transmitter, thereby reducing the reliance on manual inspections and parameter adjustments, which not only saves a lot of human resources, but also reduces the risks that personnel may encounter in industrial environments, and helps to extend the service life of the equipment. At the same time, the device integrates functions such as monitoring the actual temperature value of the measuring cylinder of the liquid level transmitter, adaptive calculation, wireless communication, and intensive modules, and can automatically complete the work that originally required manual regular inspections, multiple adjustments, and long-term monitoring during the period when the valve is set to manual control. Such automation not only effectively reduces the workload of maintenance personnel and operating personnel, but also reduces the risk of personal injury that may be caused by manual operation.

[0154] Specifically in terms of efficiency, it is estimated that the labor cost that can be saved in the on-site inspection of the level transmitter of a single unit each year is equivalent to 2 people working for 0.5 days, repeated 50 times, and a total of 50 people working for one day. In terms of parameter adjustment, the manpower that can be saved is equivalent to 6 people working for 2 days, repeated 6 times, and a total of 72 people working for one day. Taking into account the six units on site, a total of 732 people working for one day can be saved each year. This not only means saving manpower, but also means that these human resources can be reallocated to areas that require more manual intervention, thereby improving overall work efficiency and the competitiveness of the enterprise. In this way, enterprises can use human resources more efficiently and maximize efficiency.

[0155] The main advantages of the temperature adaptive compensation device include: achieving all-weather online monitoring, eliminating the lag of manual inspection and adjustment, complying with the development trend of digitalization in the industry, and significantly reducing the workload of operation and maintenance professionals. By adding the intelligent analysis function of temperature parameters and liquid level output curves, the device can intervene in advance and make fine adjustments, reduce disturbances to downstream equipment, avoid system transient phenomena, protect key equipment, and reduce grid power fluctuations. The device can accumulate on-site liquid level transmitter instrument operation data, which facilitates scientific evaluation of equipment stability and reliability, and helps power plants make more reasonable decisions in subsequent product selection and domestic substitution work. Equipped with a protection device, the device can adapt to the harsh environmental conditions on site without the need for wiring. At the same time, an interface is reserved for the subsequent addition of adjustment functions for other parameters or to meet similar needs of similar equipment, showing strong portability.

[0156] In summary, this device, through its highly automated and intelligent features, not only improves work efficiency but also enhances safety, providing strong support for industrial automation and intelligent management.

[0157] It is understandable that the above embodiments only express some implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that for ordinary technicians in this field, without departing from the concept of the present invention, the above embodiments or technical features can be freely combined, and several deformations and improvements can be made, which all belong to the protection scope of the present invention, that is, the embodiments described in "some embodiments" can be freely combined with any of the above and below embodiments. Therefore, all equivalent changes and modifications made to the scope of the claims of the present invention should belong to the scope of the claims of the present invention.

Claims

1. A method for automatically compensating internal temperature parameters of a liquid level transmitter, characterized in that: The method comprises the following steps: Reading a first liquid level value of a target liquid level transmitter in the container and a temperature parameter setting value of a target liquid level transmitter in the container, reading a second liquid level value of a liquid level gauge outside the container, and reading an actual temperature value in the container from a temperature sensor in the container; Determine the state of the target liquid level transmitter in the container according to the first liquid level value, the second liquid level value, the temperature parameter setting value and the actual temperature value in the container; Calculating based on the temperature parameter setting value and the actual temperature value in the container to obtain a temperature parameter for compensating the temperature parameter setting value; Constructing a compensation scheme based on the state of the target level transmitter in the container and the temperature parameter used to compensate for the set value of the temperature parameter; The target level transmitter in the container is adjusted according to the compensation scheme.

2. The automatic compensation method for internal temperature parameters of a liquid level transmitter according to claim 1, characterized in that: Reading the first liquid level value of the target liquid level transmitter in the container and the temperature parameter setting value of the target liquid level transmitter in the container, including: A communication request is sent to the target liquid level transmitter in the container, a communication connection is established with the target liquid level transmitter in the container, and a first liquid level value of the target liquid level transmitter in the container and a temperature parameter setting value of the target liquid level transmitter in the container are read in real time.

3. The automatic compensation method for internal temperature parameters of a liquid level transmitter according to claim 1, characterized in that: According to the first liquid level value, the second liquid level value, the temperature parameter setting value and the actual temperature value in the container, the state of the target liquid level transmitter in the container is judged, including: Determine whether the difference between the first liquid level value and the second liquid level value exceeds a first set range, and obtain a first determination result; Determine whether the difference between the temperature parameter setting value and the actual temperature value in the container exceeds a second setting range, and obtain a second determination result; If the first judgment result and the second judgment result are both exceeded, the state of the target liquid level transmitter in the container is that the temperature parameter is to be adjusted, and the temperature parameter of the target liquid level transmitter in the container needs to be adjusted.

4. The automatic compensation method for internal temperature parameters of a liquid level transmitter according to claim 3 is characterized in that: If the first judgment result is exceeded and the second judgment result is not exceeded, the state of the target liquid level transmitter in the container is to be repaired, and the target liquid level transmitter in the container needs to be inspected and repaired.

5. The automatic compensation method for internal temperature parameters of a liquid level transmitter according to claim 1, characterized in that: The temperature parameter used to compensate the temperature parameter setting value is calculated based on the temperature parameter setting value and the actual temperature value in the container, including: A temperature interval is formed according to the temperature parameter setting value and the actual temperature value in the container, and a temperature value is selected in the temperature interval at a first temperature interval for calculation to obtain a temperature parameter for compensating the temperature parameter setting value.

6. The automatic compensation method for internal temperature parameters of a liquid level transmitter according to claim 5, characterized in that: Selecting a temperature value at a first temperature interval within the temperature range for operation to obtain a temperature parameter for compensating a temperature parameter setting value includes: A temperature value is selected at a first temperature interval within the temperature range, and is input into the water density and steam density software for calculation, the water density and steam density at the corresponding temperature value are calculated, and the temperature parameter used to compensate for the temperature parameter setting value is obtained.

7. The automatic compensation method for internal temperature parameters of a liquid level transmitter according to claim 1, characterized in that: The method also includes storing a temperature parameter for compensating a temperature parameter set point.

8. The automatic compensation method for internal temperature parameters of a liquid level transmitter according to claim 1, characterized in that: According to the first liquid level value, the second liquid level value, the temperature parameter setting value and the actual temperature value in the container, the state of the target liquid level transmitter in the container is judged, which also includes: judging the validity of the first liquid level value, the second liquid level value, the temperature parameter setting value and the actual temperature value in the container, and eliminating unqualified data.

9. The automatic compensation method for internal temperature parameters of a liquid level transmitter according to claim 5, characterized in that: Based on the state of the target level transmitter in the container and the temperature parameter used to compensate for the temperature parameter set value, a compensation scheme is constructed, including: According to the state of the target liquid level transmitter in the container and the temperature parameter used to compensate the temperature parameter setting value, the temperature intelligent analysis function is called to build a compensation plan according to the first temperature interval.

10. An automatic compensation device for internal temperature parameters of a liquid level transmitter, characterized in that: include: a communication unit, the communication unit being used to read a first liquid level value of a target liquid level transmitter in the container and a temperature parameter setting value of the target liquid level transmitter in the container, to read a second liquid level value of a liquid level gauge outside the container, to read an actual temperature value in the container of a temperature sensor located in the container, and to adjust the target liquid level transmitter in the container according to a compensation scheme; and A calculation unit, wherein the calculation unit is used to determine the state of a target liquid level transmitter in the container according to the first liquid level value, the second liquid level value, the temperature parameter setting value and the actual temperature value in the container; to perform calculations according to the temperature parameter setting value and the actual temperature value in the container to obtain a temperature parameter for compensating the temperature parameter setting value; and to construct a compensation scheme according to the state of the target liquid level transmitter in the container and the temperature parameter for compensating the temperature parameter setting value.

Images