High static pressure and differential pressure measuring system and measuring method

Abstract

The invention relates to a high static pressure and differential pressure measuring system, and belongs to the technical field of pressure measurement. Comprising a high static pressure and differential pressure acquisition module, a signal processing module and a display module which are electrically connected. Wherein the high static pressure and differential pressure acquisition module consists of a high-precision power supply, a digital multimeter, a switching box, a temperature control box and a static pressure and differential pressure gauge, and is used for detecting a differential pressure signal in a high static pressure environment. The high-precision power supply provides stable power supply for the static pressure and differential pressure gauge, and the static pressure and differential pressure gauge collects and transmits pressure data. And the temperature control box receives an instruction of the central controller, adjusts the working temperature of the acquisition module in real time, and ensures a stable measurement environment. And the display module provides a processing and operation interface for the central processing unit, so that visual display of a measurement result and real-time control of a measurement process are realized. According to the system, a stable temperature environment is provided through the temperature control box, the measurement precision of high static pressure and differential pressure is remarkably improved, and meanwhile the stability and the anti-jamming capability of the system are enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of pressure measurement and testing, and particularly to a high-static-pressure differential pressure measurement system and a measurement method. Background Art

[0002] The differential pressure under high static pressure refers to the pressure difference between two measurement points in a high-pressure environment. The measurement of this pressure difference is of great significance in process industrial control and scientific research, especially in occasions where precise monitoring of subtle pressure changes inside a high-pressure system is required. The unique challenge in differential pressure measurement under high static pressure is that the differential pressure value under high static pressure is a small quantity, and it is necessary to distinguish the differential pressure fluctuation under high static pressure load and ensure the measurement accuracy, which poses extremely high requirements for the sensitivity and stability of the measurement system.

[0003] For example, in the process of oil and gas exploitation, the differential pressure under high static pressure is an important parameter. Downhole pressure monitoring requires accurate measurement of differential pressure in a high-static-pressure environment to evaluate the well state in real time and optimize the exploitation efficiency. However, the differential pressure measurement under high static pressure is affected by factors such as the performance drift of temperature sensors, complex noise interference, and environmental harshness, resulting in reduced measurement accuracy and even possible system failure. Summary of the Invention

[0004] I. Technical Problems to be Solved

[0005] In view of the deficiencies of the prior art, the present invention proposes a high-static-pressure differential pressure measurement system. This solution provides a stable temperature environment for pressure measurement through a temperature control box, improves the measurement repeatability of high-static-pressure differential pressure, and improves the stability and anti-interference ability of the measurement system through system optimization design.

[0006] II. Specific Technical Solutions

[0007] A high-static-pressure differential pressure measurement system includes a high-static-pressure differential pressure pressure acquisition module, a signal processing module, and a display module, and the modules are electrically connected to each other; the high-static-pressure differential pressure pressure acquisition module is used to detect the differential pressure change in a high-static-pressure environment. The high-static-pressure differential pressure pressure acquisition module includes a high-precision power supply, a digital multimeter, a switching box, a temperature control box, and a static-differential pressure gauge; the high-precision power supply is communicatively connected to the central processor module and is used to supply power to the static-differential pressure gauge; the static-differential pressure gauge is communicatively connected to the central processor module and is used to collect differential pressure data in real time; the temperature control box is communicatively connected to the central processor module and is used to adjust the acquisition temperature of the entire high-static-pressure differential pressure pressure acquisition module according to the instructions of the central controller; the display module provides a processing interface and an operation interface for the central processor, and realizes the visual display of the measurement results and the real-time control of the measurement process.

[0008] Implementation Principle, Working Principle:

[0009] Preferably, the high-precision power supply is a Keysight POWER E3642A power supply device, the digital multimeter is a Keithley DMM 2010 digital multimeter, and the central processing module is a computer.

[0010] Preferably, the high static pressure differential pressure acquisition module further includes a product tooling and a high static pressure differential pressure gas source. The product tooling is used for installing the high static pressure differential pressure acquisition module. Multiple expansion ports and stop valves are provided on the product tooling. The expansion ports are connection ports for expanding the gas path. The high static pressure differential pressure gas source supplies gas through the expansion ports. The temperature control box is also used for adjusting the temperature of the expanded gas path.

[0011] Preferably, the expansion ports include a measurement expansion port and a calibration expansion port. The measurement expansion port is used for accessing the gas source to be measured; the calibration expansion port is used for accessing the calibration gas.

[0012] Preferably, a pressure regulating valve is further provided on the expanded gas path. The pressure regulating valve is used for adjusting the gas supply pressure of the high static pressure differential pressure gas source to the high static pressure differential pressure acquisition module.

[0013] Preferably, the central processing module further includes a multiplexing sub-module and an operation interface. The operation interface includes a channel configuration sub-form WinForm, a background driver for serial port devices, and a system configuration sub-form WinForm. The operation interface is used for completing the configuration, communication, and control of the signal central processor module; the background driver for serial port devices includes multiple driver sub-modules. The driver sub-modules include a power supply driver sub-module, a temperature control box driver sub-module, a switch box driver sub-module, and a multimeter DMM driver sub-module; the system configuration sub-form WinForm includes a power supply serial port, a temperature control box serial port, a switch box serial port, a multimeter serial port, and a file path.

[0014] A method for measuring high static pressure differential pressure uses the above measurement system to measure high static pressure differential pressure; it includes the following steps:

[0015] S1. System configuration and initialization. First, set the configuration parameters. The operator completes the configuration of each serial port connection, device parameters, measurement channels, and test file path through the operation interface; then, perform initialization to ensure that when the system starts, the serial port driver program can initialize the hardware interfaces of each device, thereby ensuring smooth communication with the high-precision power supply, temperature control box, switch, and digital multimeter.

[0016] S2. Test environment control. Before measurement, collect the temperature and static pressure value of the working environment, and use the temperature control box to restore the temperature of the working environment to ensure the stability of the test environment and improve the measurement accuracy, and collect the temperature and the static pressure data corresponding to the temperature in real time.

[0017] S3. Data acquisition and processing. After completing the test environment control, static pressure, temperature, and differential pressure signals are obtained through sensors and transmitted to the central processor module for data processing;

[0018] S4. Test result display and analysis. After the central processor module completes data processing, the data is transmitted to the display module for display, specifically through data tables or charts.

[0019] The beneficial effects of the present invention are as follows:

[0020] 1. By precisely controlling the environmental temperature, this solution enables the differential pressure measurement under high static pressure conditions to exhibit good input-output linear characteristics, which is beneficial for data processing and analysis. Furthermore, high static pressure differential pressure measurement within the range of high static pressure (0 - 55) MPa, differential pressure (0 - 150) kPa, and temperature (-50 - 100) °C can be achieved, with good repeatability; the temperature control box provides a stable temperature environment for high static pressure differential pressure measurement, improving the measurement accuracy of high static pressure differential pressure; through the algorithm processing integrated in the central processing module, the stability and anti-interference ability of the system are enhanced.

[0021] 2. The product tooling design has multiple gas path connection ports. The gas in the extended gas path expands or contracts with the temperature change of the temperature control box, compensating for the measurement error caused by temperature change and ensuring the accuracy of pressure measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a logical schematic diagram of the high static pressure differential pressure measurement system of the present invention.

[0023] Figure 2 It is a measurement execution flowchart of the high static pressure differential pressure measurement system of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The following elaborates on the preferred embodiments of the present invention in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0025] As Figure 1-2 shown:

[0026] A high static pressure differential pressure measurement system includes a high static pressure differential pressure pressure acquisition module, a signal processing module, and a display module, and the modules are electrically connected to each other. In this solution, the display module and the central processor module are integrated into a computer system for processing the differential pressure data collected by the high static pressure differential pressure pressure acquisition module;

[0027] The high static pressure differential pressure acquisition module is used to measure the differential pressure signal in a high static pressure environment. The high static pressure differential pressure acquisition module includes a high-precision power supply, a digital multimeter, a switching box, a temperature control box, and a static pressure differential pressure gauge;

[0028] Specifically, the high-precision power supply is a Keysight POWER E3642A power supply device, which is connected to the computer system through the RS232 interface and supplies power to components such as the digital multimeter, the switching box, and the static pressure differential pressure gauge according to the instructions of the computer system;

[0029] Specifically, the digital multimeter is a Keithley DMM 2010 digital multimeter, which has characteristics such as seven and a half digit resolution, low noise, and high precision. It can collect voltage and current parameters and transmit the collected data to the computer system through the RS232 to USB interface;

[0030] The switching box is connected to the computer system through the RS485 interface. The switching box switches current and voltage signals to temperature and pressure signals according to settings or instructions and transmits them to the computer system through the RS485 to USB interface for processing;

[0031] The temperature control box can simulate the ambient temperature and can restore or simulate the temperature value of the differential pressure acquisition point under high static pressure in real time. Specifically, the temperature control box is connected to the computer system through the RS232 to USB interface and receives the instructions of the computer system through this interface to simulate the ambient temperature.

[0032] In specific implementation, the high static pressure differential pressure acquisition module further includes a product tooling and a high static pressure differential pressure gas source. The product tooling is used to install the digital multimeter, and the product tooling is installed inside the temperature control box. There are multiple gas path connection ports designed on the product tooling. Among them, the gas in the gas path will contract and expand with the temperature change in the temperature control box, which can ensure that the pressure measurement is not affected by temperature changes. At the same time, by expanding the gas inside the gas itself, the impact of external shocks on the digital multimeter and the sensor can be reduced, and its service life can be extended; in this solution, the temperature control box provides a temperature range from (-50°C - 100°C), providing a constant ambient temperature for the product tooling and the digital multimeter during measurement, enabling the digital multimeter to measure under stable temperature conditions, reducing the impact of temperature fluctuations on the measurement results, and thus improving the measurement accuracy.

[0033] During implementation, multiple expansion ports and a high-static-pressure differential-pressure gas source are provided on the product tooling of this solution. Among them, the expansion ports are specifically the connection ports of the expansion gas path, and the expansion ports specifically include measurement expansion ports and calibration expansion ports. The measurement expansion ports are for the target gas source to be tested; the calibration expansion ports are for accessing the calibration gas source. By using the calibration expansion ports, compensation is performed with gas sources and temperatures of known different pressures, and the relationship curve and compensation value of temperature versus sensor detection are obtained through fitting. During actual measurement, the measurement error can be reduced through the fitting of the measured value and the compensation value. Specifically, in order to better complete the calibration, a pressure regulating valve can be set on the expansion gas path. Through the limitation of the pressure regulating valve, it can be ensured that the gas source input pressure always remains within the set value or the input adjustable range, making the measurement more convenient.

[0034] During implementation, such as Figure 1 and Figure 2 , the central processing module further includes a multiplexing sub-module and an operation interface. The operation interface is used to complete the configuration, communication, and control of the signal central processor module. The operation interface includes a channel configuration sub-form WinForm, a background driver for serial port devices, and a system configuration sub-form WinForm;

[0035] Among them, the channel configuration sub-form WinForm includes a Button button and a TextBox text box. The Button button is used for key testing, and the TextBox text box is used to display the measured or tested data;

[0036] The background driver for serial port devices includes multiple driver sub-modules. The driver sub-modules include a power supply driver sub-module, a temperature control box driver sub-module, a switching box driver sub-module, and a multimeter DMM driver sub-module. Each driver sub-module has corresponding configuration parameters, saving / verifying, testing, and test result steps;

[0037] The system configuration sub-form WinForm includes a power supply serial port, a temperature control box serial port, a switching box serial port, a multimeter serial port, and a file path; each configuration option has corresponding configuration parameters, saving / verifying, testing, and test result steps. The underlying drivers of each serial port include functions such as scanning, connecting, disconnecting, instructing, sending, and receiving. Through each serial port and each driver self-module, the multimeter DMM driver, the switching box driver, the temperature control box driver, and the power supply driver are realized.

[0038] The specific execution process of this system is as follows:

[0039] The system starts, and the driver initializes the serial port hardware, setting communication parameters such as port numbers, high-precision power supply configurations, temperature control box configurations, switch configurations, digital multimeter configurations, etc. The data sent by each serial port application program is transmitted to the target device through the serial port hardware, and at the same time, data is received from the serial port hardware and passed to the upper-level program. Terminal data transmission, error handling, hardware flow control and software flow control are implemented to prevent data removal and loss. By managing and controlling the data transmission of the serial port device, and through functions such as initialization, configuration, data transmission, interrupt handling, error handling and device management, the efficient and reliable operation of the serial port device is ensured.

[0040] Users can perform button tests and view test data in the channel configuration sub-form WinForm. And communicate with each driver sub-module through the background driver of the serial port device. Users configure each serial port and file path in the system configuration sub-form WinForm. After the configuration is completed, the system saves the configuration parameters and performs verification. After the verification passes, each driver module is tested and the test results are displayed. After configuring the channel configuration, power configuration, temperature configuration, switch configuration, multimeter configuration and file save path information, the configuration information is saved. The sensor channel can be selected, and the final presented results are the temperature channel, static pressure channel, differential pressure channel, and the displayed data is the deviation value between the measured value and the set value.

[0041] The operation interface also includes the main form WinForm, in which TextBox controls are set to configure parameters, ComboBox controls are used to select menus, Button controls are configured for buttons, TextBox controls are used for status display, Button controls are for system configuration, Button controls are for channel configuration, Button controls are for operation management, and DataGridView controls / Chart curve controls are used to display data tables and curve data, and a status display bar.

[0042] The main form WinForm is the entry point of the operation program of the operation interface, containing a menu bar, a toolbar and other main controls, and is the main interface for users to interact with the application program. The main form WinForm opens and manages the system configuration sub-form and the channel configuration sub-form, and starts and manages background tasks. In the main form, a TextBox control is selected and inserted to set configuration parameters, a ComboBox control is inserted to select a menu, and a Button control is inserted to add a configuration button to facilitate the selection and verification of each control parameter, so as to load and store data and load test parameters subsequently. At the same time, a TextBox control is set for status display.

[0043] The central processing module also includes a data cache sub-module, which loads and stores parameters through.ini test configuration, performs parameter verification for the main form WinForm, tests the storage of the Sys.ini file for the device, loads channel configuration parameters, and controls the operation. The data cache is used to store various data in the application for sharing among different components. The configuration information in the channel configuration sub-form WinForm is stored in the data cache; the background driver of the serial device stores the received data in the data cache; the main form WinForm reads data from the data cache and displays it on the operation interface; the background task reads data from the data cache for processing.

[0044] The sequence of the system background tasks is as follows: verify configuration parameters, initialize instrument devices, load test parameters, control the measurement environment (including controlling high-precision power supplies, controlling the high and low temperatures of the temperature control box, and controlling the switch box), collect pressure data using a digital multimeter, perform parameter calculations and then move to the next channel, collect and store data, output the running status, determine whether the system is paused, and finally select a file save path to export data to an Excel file after the operation ends. The system background tasks are used to execute time-consuming operations to avoid blocking the main thread during data processing or file reading and writing. The background driver of the serial device starts background tasks to handle data reception and transmission; the background tasks read data from the data cache for processing and store the results back in the data cache; the main form WinForm starts background tasks to perform specific operations and updates the interface after the tasks are completed.

[0045] A method for measuring high static pressure and differential pressure, using the above-mentioned method for measuring high static pressure and differential pressure to measure high static pressure and differential pressure, includes the following steps:

[0046] S1. System configuration and initialization. First, set configuration parameters. The operator completes the configuration of various serial connections, device parameters, measurement channels, and test file paths through the operation interface;

[0047] Then initialize the system to ensure that when the system starts, the serial driver program can initialize the hardware interfaces of each device, thereby ensuring smooth communication with high-precision power supplies, temperature control boxes, switches, and digital multimeters.

[0048] S2. Test environment control. Before measurement, collect the temperature and static pressure values of the working environment, and use the temperature control box to restore the temperature of the working environment to ensure the stability of the test environment and improve the measurement accuracy, and collect the temperature and static pressure data corresponding to the temperature in real time;

[0049] S3. Data collection and processing. After completing the test environment control, obtain static pressure, temperature, and differential pressure signals through sensors and transmit them to the central processing module for data processing;

[0050] During specific implementation, the high static pressure differential pressure test process of this method is as follows:

[0051] (1) System configuration and initialization: First, set the configuration parameters. The operator sets basic configurations such as serial port connections, device parameters, measurement channels, and test file paths through the system display module;

[0052] Secondly, perform the initialization procedures for each hardware. The serial port driver initializes the hardware interfaces of each device to ensure smooth communication with devices such as power supplies, temperature control boxes, switches, and multimeters.

[0053] (2) Test environment control: Before measurement, restore the temperature and static pressure values of the high static pressure equipment working environment through the temperature control box to ensure the stability of the test environment. The system collects temperature and pressure data in real time for subsequent dynamic compensation and data correction. By automatically adjusting the algorithm parameters, ensure that the system can adapt to different environmental conditions, thereby improving the accuracy of data processing.

[0054] (3) Data acquisition and processing: Data acquisition obtains pressure, temperature, and differential pressure signals through high-precision sensors and transmits them to the signal processing module. During the signal processing, first, perform signal amplification. For the weak signals output by the sensors, a high-precision amplification circuit is used to increase the signal strength to ensure that it meets the requirements of subsequent processing. Then, through the adaptive filtering algorithm, dynamically adjust the filtering parameters to effectively suppress high-frequency noise and power frequency interference while retaining the dynamic characteristics of the signal to ensure the accuracy of the measurement results.

[0055] After the signal is amplified and filtered, the data is transmitted to the central processing unit module, and the dynamic sampling rate adjustment algorithm is used to automatically adjust the sampling frequency according to the change rate of the signal, ensuring high-precision data can be obtained when the signal changes rapidly, and reducing power consumption when the signal changes slowly.

[0056] (4) Test result display and analysis: The processed data is displayed in the form of data tables and charts through the display module. Users can view the deviation between the measurement results and the set values to determine whether the measurement meets the requirements. Due to the collaborative work of multiple algorithms, the test results can accurately reflect the changes in various environments. At the same time, the system supports saving the test data to a specified path and exporting it in Excel format, facilitating subsequent analysis and archiving, simplifying the data management process, and making it convenient for users to conduct further statistical analysis and result verification.

[0057] (5) Test Completion and Report Generation: After completing the tests for all channels, the system automatically verifies the integrity and accuracy of the data. Through a multi-level data correction and verification mechanism, the reliability of the test results is ensured. The user can generate a complete test report containing various test results, data analysis, and error assessment. The report clearly displays the data and its deviations in each test link, helping the user accurately identify possible sources of error during the test process.

[0058] In a high static pressure environment, the sensor signal is vulnerable to complex noise interference. The central processing unit module realizes high-precision signal processing through three core links: data amplification, filtering, and analog-to-digital conversion. Specifically: For the weak signal output by the sensor, a high-precision amplification circuit is used for data amplification to increase the signal strength and ensure that it meets the requirements of subsequent processing; then, through an adaptive filtering algorithm, the filtering parameters are dynamically adjusted to effectively suppress high-frequency noise and power frequency interference while retaining the dynamic characteristics of the signal to ensure the accuracy of the measurement results; finally, an optimized analog-to-digital conversion algorithm is used to solve the problem of insufficient signal resolution in a high static pressure environment, efficiently converting the analog signal into a digital signal to provide high-quality input for subsequent data processing; in addition, for possible signal mutations or interferences in a high static pressure environment, the signal processing module also introduces a dynamic compensation mechanism, specifically for compensating for the influence of temperature, further ensuring the continuity and stability of the measurement results. Through the above processing, the signal processing module significantly improves the measurement accuracy of the signal, providing technical support for the highly reliable operation of the high static pressure differential pressure sensor.

[0059] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. The system includes a high static pressure differential pressure acquisition module, a signal processing module and a display module, and each module is electrically connected, and is characterized by: The high static pressure differential pressure acquisition module is used to detect the differential pressure signal under the high static pressure environment. The high static pressure differential pressure acquisition module includes a high-precision power supply, a digital multimeter, a switching box, a temperature control box and a static pressure differential pressure gauge; A high-precision power supply is communicatively connected to the central processing unit module and is used to power the static pressure differential pressure gauge; The static pressure differential pressure gauge is connected to the central processing unit module for real-time collection of differential pressure data; The temperature control box is in communication connection with the central processing unit module and is used to control the temperature when collecting differential pressure data according to the instructions of the central controller; The display module provides the processing interface and operation interface of the central processor, which is used to realize the visual display of the measurement results and the real-time control of the measurement process.

2. The high static pressure differential pressure measurement system according to claim 1, characterized in that: The high-precision power supply is a Keysight POWER E3642A power supply device, the digital multimeter is a Keithley DMM 2010 digital multimeter, and the central processing module is a computer.

3. The high static pressure differential pressure measurement system according to claim 1, characterized in that :: The high static pressure differential pressure acquisition module also includes a product tooling and a high static pressure differential pressure air source. The product tooling is used for the installation of the high static pressure differential pressure acquisition module. A plurality of expansion ports and stop valves are arranged on the product tooling. The expansion port is a connection port for the expansion air circuit. The high static pressure differential pressure air source supplies air through the expansion port. The temperature control box is also used for temperature regulation of the expansion air circuit.

4. The high static pressure differential pressure measurement system according to claim 1, characterized in that: The extension port includes a measurement extension port and a calibration extension port. The measurement extension port is used to access a gas source to be measured; the calibration extension port is used to access a calibration gas.

5. The high static pressure differential pressure measurement system according to claim 1, characterized in that: The extended gas path is provided with a pressure regulating valve, and the pressure regulating valve is used to adjust the gas supply pressure of the high static pressure differential pressure source to the high static pressure differential pressure acquisition module.

6. The high static pressure differential pressure measurement system according to claim 1, characterized in that: The central processing module also includes a multiplexing submodule and an operation interface; the operation interface includes a channel configuration subwindow WinForm, a serial port device background driver, and a system configuration subwindow WinForm, and the operation interface is used to complete the configuration, communication and control of the signal central processing unit module; the serial port device background driver includes multiple driver submodules, and the driver submodules include a power driver submodule, a temperature control box driver submodule, a switch box driver submodule and a multimeter DMM driver submodule; the system configuration subwindow WinForm includes a power serial port, a temperature control box serial port, a switch box serial port, a multimeter serial port and a file path.

7. A high static pressure differential pressure measurement method, characterized in that: The high static pressure differential pressure measurement system according to claims 1 to 6 is used to measure the high static pressure differential pressure; comprising the following steps: S1, system configuration and initialization, first of all, the configuration parameters are set, and the operator completes the configuration of each serial port connection, device parameters, measurement channels, and test file paths through the operation interface; then initialization is performed to ensure that when the system starts, the serial port driver can initialize the hardware interface of each device, thereby ensuring smooth communication with the high-precision power supply, temperature control box, switcher, and digital multimeter; S2. Test environment control: Before measurement, collect the temperature and static pressure values ​​of the working environment, and use the temperature control box to restore the temperature of the working environment to ensure the stability of the test environment and improve the measurement accuracy, and collect the temperature and static pressure data corresponding to the temperature in real time; S3, data acquisition and processing, after completing the test environment control, the static pressure, temperature and differential pressure signals are obtained through sensors and transmitted to the central processing unit module for data processing; S4. Display and analysis of test results. After completing data processing, the central processing unit module transmits the data to the display module for display, specifically through data tables or charts.

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