Multifunctional composite sensor

Abstract

The utility model discloses a multifunctional composite sensor, and belongs to the technical field of sensors. Comprising a tuning fork density sensor, a temperature and liquid level integrated sensor, a signal processing module and a threaded base used for installing the tuning fork density sensor and the temperature and liquid level integrated sensor. The upper part of the threaded base is provided with a sleeve for protecting a wire pipe, and the threaded base is provided with a pressure guide hole; the temperature and liquid level integrated sensor is a sensor with a temperature compensation function and is packaged in the threaded base; the multifunctional composite sensor is installed at the bottom or on the side wall of the container and is free of a movable component, the liquid level, temperature and density measuring device is simple in design, convenient to install, stable in measurement and high in precision, liquid level values, temperature values and density values are measured in real time, and the problems that existing wiring is tedious, maintenance is complex, and many fault points exist can be effectively solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to sensor technical field more specifically, relate to a kind of multifunctional composite sensor. BACKGROUND

[0002] In petroleum, chemical, metallurgical, pharmaceutical, food, beverage, brewing and other industries, the temperature, liquid level, density and other parameters of the medium in the storage tank and liquid preparation tank are the key indicators for production process control, quality monitoring and safety management. The accurate measurement and real-time monitoring of these parameters are directly related to production efficiency, product quality and production safety.

[0003] Traditional industrial sensors generally use separate measurement mode. The density, liquid level and temperature are installed independently, which is cumbersome to install. The wires are laid separately, and the signals are transmitted through signal lines. This approach is time-consuming and labor-intensive for long-distance signal transmission. It is difficult to debug and the cost is relatively high. Product replacement or maintenance is not convenient, which leads to a decrease in the added value of products in the above industries. Second, the length of the cable increases the number of fault points, and there is a possibility of increasing the pollution of the product. It is not convenient for production process needs. Some industries must inspect the equipment after each batch of production is completed. If it is high-altitude operation, the length of the cable is too long, which increases the difficulty of disassembly. In view of this, we propose a multifunctional composite sensor. SUMMARY

[0004] The utility model aims at providing a kind of multifunctional composite sensor to solve the problems raised in the above background.

[0005] To achieve the above object, the utility model provides the following technical scheme:

[0006] A kind of multifunctional composite sensor, including tuning fork density sensor, temperature liquid level integrated sensor, signal processing module and the screw base for installing tuning fork density sensor and temperature liquid level integrated sensor;

[0007] The sleeve for protecting wire tube is arranged on the upper part of the screw base, and the pressure lead hole is arranged on the screw base;

[0008] The temperature liquid level integrated sensor is a sensor with temperature compensation function, which is packaged in the screw base. The detection end corresponds to the position of the pressure lead hole, and is used to collect medium temperature signal and liquid level signal and transmit to the signal processing module;

[0009] The tuning fork density sensor collects the density signal of the medium based on the change of physical characteristics, and transmits the density signal to the signal processing module;

[0010] The signal processing module receives the temperature signal, liquid level signal and density signal, converts the standard digital protocol signal after processing, and transmits to the host computer system.

[0011] The multifunctional composite sensor is installed on the bottom or sidewall of the container and has no movable parts.

[0012] Preferably, the tuning fork density sensor drives the vibration of the fork body through a piezoelectric element, collects the medium density signal based on the principle that the vibration frequency of the fork body changes with the change of the liquid density, and outputs the density value after calculating the vibration frequency signal through an electronic unit and transmits the density value to the signal processing module.

[0013] Preferably, the temperature and liquid level integrated sensor comprises a signal processing circuit, which processes the temperature signal and the liquid level related signal and outputs the real-time accurate liquid level value.

[0014] Preferably, the signal processing module is provided with an RS485 interface with a load matching circuit.

[0015] Preferably, the tuning fork density sensor, the temperature and liquid level integrated sensor and the signal processing module are connected through a standardized interface, and the function adjustment can be realized by increasing or decreasing the modules.

[0016] Preferably, the sleeve and the threaded base are integrally formed and are used for protecting the connecting wire harness of the temperature and liquid level integrated sensor.

[0017] Preferably, the material of the threaded base is adapted to the chemical properties of the medium to be monitored.

[0018] Compared with the prior art, the utility model has the beneficial effects that:

[0019] The utility model discloses simple design, convenient installation, stable measurement, high precision, and real-time measurement of liquid level value, temperature value and density value, and can effectively solve the problems of complicated wiring, complex maintenance and many fault points. The integrated tuning fork density sensor and the temperature and liquid level integrated sensor with temperature compensation, combined with the numerical optimization (filtering, anti-interference and calibration) of the signal processing module and the special signal processing circuit, effectively offset the influence of temperature interference and environmental noise on measurement, significantly improve the measurement precision and stability of temperature, liquid level and density parameters, and are especially suitable for complex medium environments such as high viscosity and corrosion. DRAWINGS

[0020] Fig. 1 It is the overall structure schematic diagram of the utility model;

[0021] Fig. 2 It is the liquid level control system field installation schematic diagram of the utility model;

[0022] Fig. 3 It is the existing liquid level control system field installation schematic diagram.

[0023] The figure label description: 1, multifunctional composite sensor; 2, tuning fork density sensor; 3, temperature and liquid level integrated sensor; 4, signal processing module; 5, temperature sensor; 6, densimeter; 7, liquid level meter. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.

[0025] Embodiment:

[0026] Please refer to Figs. 1-3 A multifunctional composite sensor for petroleum, chemical, metallurgical, pharmaceutical, food, beverage, brewing industry storage tank and liquid preparation tank, water treatment equipment related, comprising a tuning fork density sensor 2, a temperature and liquid level integrated sensor 3, a signal processing module 4 and a threaded base for mounting the tuning fork density sensor 2 and the temperature and liquid level integrated sensor 3.

[0027] The threaded base is provided with a sleeve for protecting the wire tube, and a pressure introduction hole is formed in the threaded base; the pressure introduction hole can accurately introduce the medium liquid level height, providing stable medium contact conditions for liquid level measurement, and ensuring the accuracy of liquid level signal acquisition.

[0028] The temperature and liquid level integrated sensor 3 is a sensor with temperature compensation function, which is packaged in the threaded base, and its detection end corresponds to the position of the pressure introduction hole, which is used to collect medium temperature signal and liquid level signal and transmit them to the signal processing module 4; the temperature and liquid level integrated sensor 3 includes a signal processing circuit, which processes temperature signal and liquid level related signal, and outputs real-time accurate liquid level value. The packaging structure can avoid direct contact of the sensor core element with complex medium, reduce wear and pollution; the temperature compensation function combined with the signal processing circuit for cooperative processing of temperature signal and liquid level related signal can offset the interference of temperature change on liquid level measurement, significantly improve the precision and stability of liquid level measurement, and ensure the output of real-time accurate liquid level value.

[0029] The tuning fork density sensor 2 collects the density signal of the medium based on the change of physical characteristics and transmits the density signal to the signal processing module 4; specifically, the tuning fork density sensor 2 drives the vibration of the fork body through the piezoelectric element, collects the medium density signal based on the principle of changing the vibration frequency of the fork body due to the change of liquid density, and outputs the density value after the electronic unit calculates the vibration frequency signal and transmits it to the signal processing module 4; the piezoelectric element driving mode does not require mechanical transmission structure, and cooperates with the design without moving parts, which can reduce the influence of medium viscosity and impurities on the sensor, reduce the risk of wear and blockage, and prolong the service life; the electronic unit calculates the vibration frequency signal in real time, can quickly respond to density changes, ensures the timeliness and accuracy of density measurement, and is suitable for complex medium environments such as high viscosity and corrosion.

[0030] The signal processing module 4 receives the temperature signal, liquid level signal and density signal, converts them into standard digital protocol signals after processing, and transmits them to the upper computer system; specifically, the signal processing module 4 includes a signal conversion sub-module, which receives temperature, liquid level and density signals, converts them into standard RS485 protocol signals after numerical optimization, and transmits them to the secondary instrument, PLC, DCS or SIS upper computer system; the signal processing module 4 is provided with an RS485 interface with a load matching circuit, which can simultaneously connect at least 100 multifunctional composite sensors or similar field instruments; numerical optimization processing can filter out environmental interference signals, improve the data signal-to-noise ratio, and ensure the accuracy and reliability of the signals transmitted to the upper computer; compared with traditional 4-20mA analog signals, RS485 protocol cooperates with load matching circuit, which can greatly reduce the number of hardware interfaces of the backend system, reduce hardware procurement costs, reduce wiring workload and material consumption, save installation costs, support centralized monitoring of multiple devices, improve system expansion flexibility, and adapt to large-scale industrial scene applications.

[0031] The multifunctional composite sensor is installed at the bottom or sidewall of the container and has no movable parts. The bottom or sidewall installation method can ensure that the sensor is in full contact with the medium, avoid measurement blind spots caused by improper installation position, and adapt to different container structures; the design without movable parts can eliminate hidden troubles such as component wear and jamming, reduce maintenance frequency and cost, reduce measurement errors caused by mechanical wear, and ensure the stability of long-term operation.

[0032] The use of RS485 communication mode greatly reduces the hardware cost of the backend system. The traditional instrument output signal is a 4-20mA analog signal, and the backend hardware needs to be one-to-one corresponding. However, by adopting the 485 communication mode, the hardware cost of the backend system is greatly reduced, one 485 port can connect hundreds of such field instruments, which can greatly save the wiring cost and is suitable for more occasions.

[0033] In the application, the sleeve and the threaded base are integrally formed structures for protecting the connecting wire harness of the temperature level integrated sensor 3, which can not only enhance the overall structural strength of the sensor, but also effectively protect the connecting wire harness of the temperature level integrated sensor 3 from being corroded by the medium or mechanically damaged from the outside, thereby ensuring the stability of signal transmission.

[0034] In the application, the material of the threaded base is adapted to the chemical properties of the medium to be monitored, which can avoid the corrosion of the base by the medium and prolong the overall service life of the product.

[0035] In the application, the tuning fork density sensor 2, the temperature level integrated sensor 3 and the signal processing module 4 are connected through standardized interfaces, and the function adjustment can be realized by increasing or decreasing the modules; the standardized interface design enables the sensor to be flexibly combined with functions according to the field requirements (such as separately retaining the temperature level measurement or adding other parameter monitoring modules), thereby improving the product versatility, reducing the customization cost and adapting to more industry scenarios.

[0036] The basic principle, main features and advantages of the utility model are shown and described above. It should be understood by those skilled in the art that the utility model is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only preferred examples of the utility model and are not intended to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model can also have various changes and improvements, and these changes and improvements all fall within the scope of the utility model claimed. The scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. A multifunctional composite sensor, characterized by, The multifunctional composite sensor comprises a tuning fork density sensor (2), a temperature and liquid level integrated sensor (3), a signal processing module (4), and a threaded base for mounting the tuning fork density sensor (2) and the temperature and liquid level integrated sensor (3). The threaded base is provided with a sleeve for protecting a wire tube, and a pressure guiding hole is formed in the threaded base. The temperature and liquid level integrated sensor (3) is a sensor with temperature compensation function, which is packaged in the threaded base, and its detection end corresponds to the position of the pressure guiding hole, and is used for collecting medium temperature signals and liquid level signals and transmitting them to the signal processing module (4). The tuning fork density sensor (2) collects the density signals of the medium based on the change of physical characteristics, and transmits the density signals to the signal processing module (4). The signal processing module (4) receives the temperature signals, liquid level signals and density signals, converts them into standard digital protocol signals after processing, and transmits them to the upper computer system. The multifunctional composite sensor is installed at the bottom or sidewall of a container, and has no movable parts.

2. The multi-functional composite sensor according to claim 1, wherein: The tuning fork density sensor (2) drives the vibration of the fork body through a piezoelectric element, collects the medium density signals based on the principle that the change of liquid density changes the vibration frequency of the fork body, and outputs the density value after calculating the vibration frequency signal through an electronic unit and transmits it to the signal processing module (4).

3. The multi-functional composite sensor according to claim 1, wherein: The temperature and liquid level integrated sensor (3) comprises a signal processing circuit, which processes the temperature signals and liquid level related signals, and outputs real-time accurate liquid level values.

4. The multi-functional composite sensor according to claim 1, wherein: The signal processing module (4) is provided with an RS485 interface with load matching circuit.

5. The multi-functional composite sensor according to claim 1, wherein: The tuning fork density sensor (2), the temperature and liquid level integrated sensor (3), and the signal processing module (4) are connected through standardized interfaces, and the function adjustment can be realized by increasing or decreasing the modules.

6. The multi-functional composite sensor according to claim 1, wherein: The sleeve and the threaded base are integrally formed structures for protecting the connecting wire harness of the temperature and liquid level integrated sensor (3).

7. The multi-functional composite sensor according to claim 1, wherein: The material of the threaded base is adapted to the chemical properties of the medium to be monitored.

Images