CN-224202534-U - Servo level gauge transmitter

CN224202534UCN 224202534 UCN224202534 UCN 224202534UCN-224202534-U

Abstract

The utility model discloses a servo liquid level meter transmitter, and belongs to the field of liquid level measurement equipment. The utility model measures dynamic data of liquid in a liquid container through a measuring unit, wherein the dynamic data comprises float change data and liquid change trend data, the temperature data and pressure data of the liquid in the liquid container are collected through a collecting unit, temperature compensation is carried out through a processing unit based on the temperature data, pressure compensation is carried out based on the pressure data, a control instruction is generated according to the dynamic data, and corresponding operation is carried out through an executing unit according to the control instruction. The dynamic data detected by the measuring unit is utilized to generate a control instruction based on the dynamic data, so that the accurate multiple judgment on the liquid level change is realized, and the accuracy and the reliability of measurement are improved.

Inventors

WANG XIAPING
LIN HAO
SHA ZHENLONG

Assignees

上海一诺仪表有限公司

Dates

Publication Date: 20260505
Application Date: 20250604

Claims (10)

1. A servo level gauge transmitter for use in a fluid container, comprising: The measuring unit is used for measuring dynamic data of the liquid in the liquid container, wherein the dynamic data comprise float change data and liquid change trend data; The collecting unit is used for collecting temperature data and pressure data of the liquid in the liquid container; The processing unit is respectively connected with the measuring unit and the acquisition unit and is used for performing temperature compensation based on the temperature data, performing pressure compensation based on the pressure data and generating a control instruction according to the dynamic data; and the execution unit is connected with the processing unit and used for executing corresponding operation according to the control instruction.
2. The servo level gauge transmitter of claim 1, wherein the measurement unit comprises: A moment detection module for measuring a moment signal of a float in the liquid container; the Hall detection module is used for detecting a displacement signal of the floater in the liquid container; The output end of the photoelectric detection module is connected with the first input end of the processing unit, and the photoelectric detection module is used for detecting liquid change trend data in the liquid container; The first input end of the analog-to-digital conversion module is connected with the output end of the moment detection module, the second input end of the analog-to-digital conversion module is connected with the output end of the Hall detection module, the output end of the analog-to-digital conversion module is connected with the second input end of the processing unit, and the analog-to-digital conversion module is used for converting the moment signal into moment data and converting the displacement signal into displacement data.
3. The servo level gauge transmitter of claim 2, wherein the torque detection module comprises: the moment sensor is used for collecting moment information of a floater in the liquid container; The input end of the first amplifier is connected with the output end of the moment sensor, the output end of the first amplifier forms the output end of the moment detection module, and the first amplifier is used for filtering and amplifying the moment information to obtain the moment signal.
4. The servo level gauge transmitter of claim 2, wherein the hall sensing module comprises: At least one hall sensor for acquiring displacement information of the float; The number of the second amplifiers is the same as that of the Hall sensors, each second amplifier corresponds to one Hall sensor, the input end of each second amplifier is connected with the output end of the corresponding Hall sensor, the output end of each second amplifier serves as the output end of the Hall detection module, and the second amplifiers are used for filtering and amplifying the displacement information to obtain the displacement signal.
5. The servo level gauge transmitter of claim 4 wherein said hall sensing module comprises 7 of said hall sensors and 7 of said second amplifiers.
6. The servo level gauge transmitter of claim 2, wherein the photo detection module comprises: At least one photoelectric sensor for detecting liquid change trend information in the liquid container; The quantity of the amplitude converters is the same as that of the photoelectric sensors, each amplitude converter corresponds to one photoelectric sensor, the input end of each amplitude converter is connected with the output end of the corresponding photoelectric sensor, the output end of each amplitude converter serves as the output end of the corresponding photoelectric detection module, and the amplitude converters are used for converting the liquid change trend information into the liquid change trend data of preset voltage.
7. The servo level gauge transmitter of claim 6 wherein said photo detection module comprises 2 of said photo sensors and 2 of said amplitude converters.
8. The servo level gauge transmitter of claim 1, wherein the acquisition unit comprises: The temperature sensor is used for acquiring a temperature signal of the liquid in the liquid container; The input end of the third amplifier is connected with the output end of the temperature sensor, the output end of the third amplifier is connected with the processing unit, and the third amplifier is used for filtering and amplifying the temperature signal to obtain the temperature data; a pressure sensor for acquiring a pressure signal of the liquid in the liquid container; The input end of the fourth amplifier is connected with the output end of the pressure sensor, the output end of the fourth amplifier is connected with the processing unit, and the fourth amplifier is used for filtering and amplifying the pressure signal to obtain the pressure data.
9. The servo level gauge transmitter of claim 1, wherein the execution unit comprises: The input end of the isolation module is connected with the processing unit and is used for isolating the control instruction and enhancing the signal to obtain control information; the input end of the control module is connected with the output end of the isolation module and is used for generating a driving signal according to the control information; and the input end of the motor is connected with the output end of the control module, and the motor executes corresponding operation according to the driving signal.
10. The servo level gauge transmitter of claim 1, further comprising: The man-machine interaction module is connected with the processing unit and used for receiving input signals and displaying the temperature data, the pressure data, the float change data and the liquid change trend data; The power module is respectively connected with the measuring unit, the collecting unit, the processing unit, the executing unit and the man-machine interaction module and is used for supplying power to the measuring unit, the collecting unit, the processing unit, the executing unit and the man-machine interaction module.

Description

Servo level gauge transmitter Technical Field The utility model relates to the field of liquid level measurement equipment, in particular to a servo liquid level meter transmitter. Background The liquid level measurement technology has wide application in the fields of industrial production, environmental monitoring, energy management and the like. Along with the continuous improvement of the industrial automation degree, higher requirements are put on the precision, stability and reliability of liquid level measurement. The servo liquid level meter is used as a common liquid level measuring device, and is widely applied to industries such as petrochemical industry, pharmacy, food processing and the like due to the characteristics of high measuring precision, wide application range and the like. At present, the common liquid level meter on the market mainly comprises a pontoon type liquid level meter, a magnetostrictive liquid level meter, a photoelectric liquid level meter and the like. The Hall type electric float liquid level transmitter converts the variation of the liquid level into corresponding Hall voltage signals through a float, a torsion pipe system and a Hall sensor system, and the signals are transmitted to an upper computer in a bus signal mode of 4-20mA or HART and the like after being sampled and processed by the transmitter. Although the liquid level meter overcomes the mechanical abrasion problem of the traditional electric pontoon liquid level transmitter, the liquid level meter has certain limitations in nonlinear measurement, power consumption and precision. The photoelectric liquid level meter is another common liquid level measuring device, changes of the liquid level are converted into a rotation angle of a concentric shaft by adopting a constant force spring, and then the rotation angle is converted into a pulse signal by a laser encoder, so that a measuring wire in the traditional servo liquid level meter is replaced, and the durability of the measuring device is improved. However, such a gauge has insufficient adaptability under complex conditions, and in particular in environments with large temperature and pressure variations, the measurement accuracy is susceptible to being affected. The magnetostrictive liquid level meter is a novel liquid level measuring device, adopts a modularized structural design, completely isolates a core element from a process medium, and prolongs the service life. Some improved magnetostrictive liquid level meters are also provided with thermocouples and pressure transmitters, and can compensate and calculate measurement errors caused by the change of the density of the measured liquid along with the temperature in the measurement process. However, such level gauges still have room for improvement in terms of high precision measurements, especially in situations where a rapid response to a rapid change in liquid level in real time is required. However, the prior art of the liquid level meter still has some defects in practical application, namely firstly, the response speed of the prior art to dynamic change of liquid is insufficient, the change trend of the liquid level is difficult to reflect in real time, and secondly, the comprehensive consideration of environmental factors such as temperature, pressure and the like is lacking, so that the stability and reliability of a measurement result under a complex working condition are insufficient. Therefore, there is a need to develop a servo level gauge transmitter that can measure the liquid level with high accuracy, respond to the liquid level change in real time, and comprehensively consider the influence of temperature and pressure factors to meet the high requirements of the modern industry for liquid level measurement. Disclosure of utility model Aiming at the problems of poor measurement precision, lack of compensation mechanism for temperature and pressure change and poor long-term stability of liquid level measurement in the prior art, the invention provides a servo liquid level meter transmitter which can realize high-precision and high-stability liquid level measurement and compensate for temperature and pressure change. The application provides a servo liquid level meter transmitter, which is applied to a liquid container and comprises the following components: The measuring unit is used for measuring dynamic data of the liquid in the liquid container, wherein the dynamic data comprise float change data and liquid change trend data; The collecting unit is used for collecting temperature data and pressure data of the liquid in the liquid container; The processing unit is respectively connected with the measuring unit and the acquisition unit and is used for performing temperature compensation based on the temperature data, performing pressure compensation based on the pressure data and generating a control instruction according to the dynamic data; and the execution unit is connected with the