Gateway device with analog quantity access and flow calculation functions

Abstract

The utility model relates to the technical field of gateways, in particular to a gateway device with analog quantity access and flow calculation functions, which is internally integrated with analog signals for accessing differential pressure, real-time gauge pressure and real-time temperature detected by a metering element. The analog-to-digital conversion assembly is used for converting an analog signal into a digital signal and converting the analog signal into the digital signal, and a metering flow calculation module is embedded in the CPU processing unit and used for calculating volume flow and flow after temperature and pressure compensation. The gateway device is provided with a wired network communication assembly and a wireless network communication assembly, a calculation result is uploaded through the wired network communication assembly and / or the wireless network communication assembly, a flow calculation function is built in the gateway device, a traditional flow totalizer and a PLC function are replaced, equipment needed in the implementation process is reduced, and meanwhile investment and maintenance manpower are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of gateways, in particular to a gateway device with analog quantity access and flow calculation functions. Background Art

[0002] For the piezometric flow metering and data acquisition system, the current mature solution is as Figure 1 shown. The metering primary detector inputs the measured differential pressure into the transmitter. The transmitter converts the differential pressure signal into a 4-20 mA analog signal, and then connects the 4-20 mA analog signal to the flow integrator. At the same time, the supporting pressure and temperature signals for flow compensation are connected to the flow integrator. The flow integrator calculates the instantaneous flow and cumulative flow according to the flow calculation formula for the input differential pressure signal, pressure signal, temperature signal, etc., and then accesses the field PLC / DCS or data acquisition gateway and other systems or devices through RS-485 serial communication, and then uploads the data to the informatization system applications such as the energy management system of the owner through the TCP / IP network communication method.

[0003] This method has the following problems:

[0004] 1. Many devices are required, with large investment. Flow calculation devices such as flow integrators or PLCs and data acquisition devices such as gateways are needed;

[0005] 2. Due to many intermediate devices, the daily maintenance workload is large and there are many fault points. Both the flow integrator and the data acquisition gateway and other devices need to be maintained daily, requiring a lot of resources and manpower. Content of the Utility Model

[0006] In view of this, the purpose of the utility model is to provide a gateway device with analog quantity access and flow calculation functions to solve the problems of many devices, a large amount of resources and manpower required by the existing method.

[0007] Based on the above purpose, the utility model provides a gateway device with analog quantity access and flow calculation functions, and the gateway device internally integrates:

[0008] An analog-to-digital conversion component, which is used to access the analog signals of the differential pressure, real-time gauge pressure and real-time temperature detected by the metering element, and convert the analog signals into digital signals;

[0009] An RS485 communication component, which is used for serial signal access;

[0010] A wired network communication component, which is used for network signal access and data upload;

[0011] A wireless network communication component, which is used to realize the upload of gateway data through wireless communication;

[0012] CPU processing unit, wherein a metering flow calculation module is embedded in the CPU processing unit, and the metering flow calculation module is used to receive the differential pressure converted into a digital signal by an analog-to-digital conversion component, calculate the volumetric flow, calculate the flow after temperature and pressure compensation according to the real-time gauge pressure and real-time temperature converted into digital signals by the received analog-to-digital conversion component, and upload the calculation results through the wired network communication component and / or the wireless network communication component.

[0013] Preferably, the analog-to-digital conversion component includes at least three analog-to-digital conversion modules, and the three analog-to-digital conversion modules are respectively used to input differential pressure signals, pressure signals and temperature signals, and convert the input analog signals into digital signals.

[0014] Preferably, the analog-to-digital conversion module includes a KV-AD40V type conversion unit.

[0015] Preferably, at least two COM ports are configured in the RS485 communication component for multiplexing the RS232 / 485 serial port.

[0016] Preferably, the wired network communication component includes a TCP / IP communication module.

[0017] Preferably, the wireless network communication component includes a 4G / 5G communication module and a wifi communication module. The 4G / 5G communication module includes an EC20 module and an FX03 module, and the wifi communication module includes an ESP8266 or ESP32 module.

[0018] Preferably, the CPU processing unit uses an ARM Cortex-A series chip.

[0019] Advantages of the present utility model:

[0020] 1. The gateway device of the present utility model supports the access of analog signals and has a wider range of applicable scenarios;

[0021] 2. The gateway device of the present utility model has a built-in flow calculation function, which replaces the functions of traditional flow integrators and PLCs, reduces the equipment required in the implementation process, and simultaneously reduces the investment and maintenance manpower;

[0022] 3. The gateway device of the present utility model supports wireless communication via wifi and network interface cards, and has more options for wireless upload. Description of the Drawings

[0023] In order to more clearly illustrate the technical solutions in the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only those of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 This is a schematic diagram of an existing pressure - type flow metering and data acquisition system;

[0025] Figure 2 This is a schematic diagram of the gateway device composition according to an embodiment of the present utility model. Specific embodiments

[0026] To make the objectives, technical solutions, and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below in conjunction with specific embodiments.

[0027] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present utility model should have the ordinary meaning understood by those with ordinary skills in the field to which the present utility model belongs. The "first", "second" and similar terms used in the present utility model do not denote any order, quantity or importance, but are only used to distinguish different components. Words such as "including" or "comprising" mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects. "Connection" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Upper", "lower", "left", "right", etc. are only used to represent relative position relationships. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0028] As Figure 2 shown, the embodiments of this specification provide a gateway device with analog quantity access and flow calculation functions. The gateway device internally integrates an analog - to - digital conversion component, an RS485 communication component, a wired network communication component, a wireless network communication component, and a CPU processing unit.

[0029] Among them, the analog - to - digital conversion component is used to access the analog signals of differential pressure, real - time gauge pressure, and real - time temperature detected by the metering element, and convert the analog signals into digital signals. It has an analog - to - digital conversion module (A / D conversion module) built - in, and uses a KV - AD40V conversion unit (but not limited to this) to convert the accessed analog signals into digital signals and access the CPU processing unit. Among them, the temperature signal supports two forms: outputting a 4 - 20mA signal through a temperature transmitter and directly outputting a resistance signal. Figure 2 These two forms are shown in

[0030] The RS485 communication component provides the 485 communication access function of traditional gateway devices. By integrating an RS485 communication module (where COM1 and COM2 can be configured as reusable RS232 / 485), it enables the access of 485 serial port signals and 232 serial port signals, and multiple groups of 485 communication modules can be set up.

[0031] The wired network communication component is used for network signal access and data upload. It has a network communication access function, integrates a TCP / IP communication module, and supports communication protocols such as ModbusTCP, OPCUA, OPCDA, IEC104, and MQTT to achieve network signal access and data upload. Multiple groups of network communication modules can be set up.

[0032] The wireless network communication component is configured with 4G / 5G communication modules and wifi communication modules. The 4G / 5G module uses EC20 and FX03 modules (but not limited to these), and the wifi communication module uses ESP8266 or ESP32 modules (but not limited to these) to upload gateway data through wireless communication.

[0033] The CPU processing unit is the computing unit of this gateway device. The main module of the CPU processing unit uses an ARM Cortex-A series chip (but not limited to this), and the operating system is an embedded Linux system. It is responsible for data processing and data upload. An integrated metering flow calculation module calculates the volumetric flow according to formula (1) after receiving the differential pressure signal detected by the metering detection element. At the same time, according to the temperature and pressure signals detected by the detection element received, it calculates the flow after temperature and pressure compensation according to formula (2), and uploads the calculation results through the wired network communication component and / or the wireless network communication component.

[0034]

[0035] Where: Q V Instantaneous volumetric flow (m3 / h); k Flow coefficient; ΔP Differential pressure value (Pa); ρ Medium density (kg / m3)

[0036]

[0037] Where: Q 补后 Is the flow after temperature and pressure compensation (m3 / h); Q 补前 Is the flow before temperature and pressure compensation (m3 / h); p Real-time gauge pressure is the fluid pressure measured dynamically in real time (Pa); p Design pressure is the design pressure (Pa); t Real-time temperature is the flow temperature measured dynamically in real time (K); t Design temperature is the design temperature (K).

[0038] Those of ordinary skill in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present utility model (including the claims) is limited to these examples; under the concept of the present utility model, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations in different aspects of the present utility model as described above, and they are not provided in detail for the sake of brevity.

[0039] The present utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A gateway device with analog access and flow calculation functions, characterized in that, The gateway device integrates internally: An analog-to-digital conversion component, which is used to access the analog signals of differential pressure, real-time gauge pressure, and real-time temperature detected by the metering element, and convert the analog signals into digital signals; An RS485 communication component, which is used for serial port signal access; A wired network communication component, which is used for network signal access and data upload; A wireless network communication component, which is used to upload gateway data through wireless communication; A CPU processing unit, and a metering flow calculation module is embedded in the CPU processing unit. The metering flow calculation module is used to receive the differential pressure converted into a digital signal by the analog-to-digital conversion component, calculate the volume flow, calculate the flow after temperature and pressure compensation according to the real-time gauge pressure and real-time temperature converted into digital signals by the received analog-to-digital conversion component, and upload the calculation results through the wired network communication component and / or the wireless network communication component.

2. The gateway device with analog access and flow calculation functions according to claim 1, characterized in that, The analog-to-digital conversion component includes at least three analog-to-digital conversion modules, and the three analog-to-digital conversion modules are respectively used to input differential pressure signals, pressure signals, and temperature signals, and convert the input analog signals into digital signals.

3. The gateway device with analog access and flow calculation functions according to claim 2, characterized in that, The analog-to-digital conversion module includes a KV-AD40V type conversion unit.

4. The gateway device with analog quantity access and flow calculation functions according to claim 1, characterized in that At least two COM ports are configured in the RS485 communication component for multiplexing RS232 / 485 serial ports.

5. The gateway device with analog access and flow calculation functions according to claim 1, characterized in that The wired network communication component includes a TCP / IP communication module.

6. The gateway device with analog access and flow calculation functions according to claim 1, characterized in that, The wireless network communication component includes a 4G / 5G communication module and a wifi communication module. The 4G / 5G communication module includes an EC20 module and an FX03 module, and the wifi communication module includes an ESP8266 or ESP32 module.

7. The gateway device with analog access and flow calculation functions according to claim 1, wherein The CPU processing unit adopts an ARM Cortex-A series chip.

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