Multi-gear intrinsically safe power supply gas pipe network acquisition terminal

Abstract

The utility model belongs to the technical field of gas monitoring, and discloses a multi-gear intrinsically safe power supply gas pipe network acquisition terminal which comprises a shell, a main control module, a multi-gear voltage regulation module, an intrinsically safe power supply module, a data acquisition module, a storage module and a data transmission module, and the main control module, the multi-gear voltage regulation module, the intrinsically safe power supply module, the data acquisition module, the storage module and the data transmission module are arranged in the shell. The main control module is electrically connected with the multi-gear voltage regulation module, the data acquisition module, the storage module and the data transmission module, and the intrinsic safety power supply module is electrically connected with the data acquisition module and the multi-gear voltage regulation module. According to the utility model, multi-gear extensible voltage output and intrinsic safety power supply are provided, self-adaptive adjustment and safe and stable operation of the acquisition terminal under different working conditions are realized, and the reliability, safety and expandability of gas pipe network data acquisition are improved; meanwhile, the multi-gear voltage regulation module and the intrinsic safety power supply module can be freely expanded according to requirements, and the requirement for existing multi-device and multi-scene complex use occasions is met.

Description

Technical Field

[0001] This utility model belongs to the field of gas collection and monitoring technology, specifically relating to a gas pipeline network collection terminal with multi-level intrinsically safe power supply. Background Technology

[0002] With the continuous expansion of urban gas pipeline networks, the safety and stability of gas pipeline networks, as an important part of urban infrastructure, are directly related to the smooth operation of residents' lives and industrial production, which puts forward higher requirements for the safety monitoring and data collection of gas pipeline networks.

[0003] Traditional gas pipeline network data acquisition terminals suffer from problems such as single voltage output, unsafe power supply methods, low data acquisition reliability, and a limited number of acquisition devices, making it difficult to meet the diverse needs of modern gas pipeline network data acquisition and monitoring. Especially in flammable and explosive environments, ensuring the safe and stable operation of gas pipeline network acquisition terminals has become an urgent technical problem to be solved. Summary of the Invention

[0004] The purpose of this invention is to provide a multi-level intrinsically safe power supply gas pipeline network data acquisition terminal to solve the aforementioned technical problems in the existing technology and improve the accuracy and safety of gas pipeline network data acquisition and monitoring.

[0005] This utility model is achieved through the following technical solution:

[0006] A gas pipeline network data acquisition terminal with multi-level intrinsically safe power supply includes a main control module, which is electrically connected to a multi-level voltage regulation module, a data acquisition module, a storage module, and a data transmission module. The intrinsically safe power supply module is electrically connected to both the data acquisition module and the multi-level voltage regulation module. The multi-level voltage regulation module includes a current sampling circuit, a voltage conversion circuit, a level control circuit, and an output sampling feedback circuit. The output of the current sampling circuit is electrically connected to the input of the voltage conversion circuit. The output of the voltage conversion circuit is electrically connected to both the input of the level control circuit and the input of the output sampling feedback circuit. The outputs of the level control circuit and the output of the output sampling feedback circuit are also electrically connected to the input of the voltage conversion circuit. The input of the current sampling circuit is the input power supply, and the output of the output sampling feedback circuit is the power output. The intrinsically safe power supply module includes a current limiting circuit, a voltage limiting circuit, and an isolation circuit connected in sequence.

[0007] Preferably, the voltage conversion circuit uses a DC-DC chip circuit, the gear control circuit uses a digital potentiometer circuit, the output terminal of the DC-DC chip circuit is electrically connected to the positive terminal of diode D1, and the negative terminal of diode D1 is electrically connected to the input terminal of the output sampling feedback circuit and the input terminal of the digital potentiometer circuit, respectively. The current sampling circuit includes a precision sampling resistor R5 connected in parallel and a current amplifier chip. The VCC input power supply is electrically connected to one end of resistor R1 and the source S of P-channel field-effect transistor Q1, respectively. The gate G of transistor Q1 is electrically connected to the other end of resistor R1 and one end of resistor R2. The drain D of P-channel MOSFET Q1 is electrically connected to precision sampling resistor R5 and current amplifier chip. The other end of resistor R2 is electrically connected to the collector of NPN transistor Q2. The base of NPN transistor Q2 is electrically connected to one end of resistor R3 and one end of resistor R4. The emitter of NPN transistor Q2 and the other end of resistor R4 are connected to power supply ground. The digital potentiometer circuit, current amplifier chip and the other end of resistor R3 are electrically connected to the main control module.

[0008] Preferably, the current-limiting circuit includes a self-resetting fuse F1 and a current-limiting resistor R6 connected in series. The current-limiting resistor R6 is electrically connected to the voltage-limiting circuit, which includes Zener diodes Z1, Z2, Z3, and Z4 connected in parallel. The isolation circuit uses an isolation transformer.

[0009] Preferably, the data acquisition module includes a communication interface and an acquisition device electrically connected to the communication interface. The communication interface includes, but is not limited to, an RS485 interface, an RS232 interface, a TTL serial port, an I2C interface, and an analog interface. The acquisition device includes, but is not limited to, a flow meter, a pressure sensor, a temperature sensor, and a gas sensor.

[0010] Preferably, the data transmission module includes a wired transmission module or a wireless transmission module.

[0011] Preferably, the main control module adopts an MCU control unit.

[0012] Preferably, the system includes a housing, in which the main control module, multi-level voltage regulation module, data acquisition module, storage module, data transmission module, and intrinsically safe power supply module are installed.

[0013] The beneficial effects of this utility model are:

[0014] This invention features a simple principle: a multi-level voltage adjustment module that allows for adjustable output voltage to meet various instrument operating requirements, simplifying the installation and debugging of the data acquisition terminal, satisfying the needs of different devices, and improving power supply flexibility and adaptability. The intrinsically safe power supply module, employing an intrinsically safe circuit design, ensures the safety of the equipment in a gas environment, preventing sparks or high temperatures from occurring in the event of a fault, thus avoiding the possibility of explosions and improving the safety and reliability of the data acquisition terminal. The data acquisition module enables real-time monitoring of various parameters within the gas pipeline network and precise processing and analysis of the collected data, improving the accuracy and reliability of data acquisition. The data transmission module supports remote data transmission, allowing the monitoring center to acquire data from the terminal in real time for further analysis and processing, enhancing the real-time nature and effectiveness of monitoring. This invention is suitable for complex and variable gas pipeline network environments, enabling the simultaneous acquisition of data from multiple instruments, achieving high efficiency in gas pipeline network data acquisition, and reducing product and maintenance costs. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the architecture of the gas pipeline network data acquisition terminal according to an embodiment of this utility model;

[0016] Figure 2 This is a schematic diagram of the architecture of the multi-level voltage regulation module according to an embodiment of the present utility model;

[0017] Figure 3 This is a schematic diagram of the circuit structure of the multi-level voltage regulation module according to an embodiment of the present invention;

[0018] Figure 4 This is a schematic diagram of the architecture of an intrinsically safe power supply module according to an embodiment of this utility model;

[0019] Figure 5 This is a schematic diagram of the circuit structure of an intrinsically safe power supply module according to an embodiment of this utility model;

[0020] Figure 6 This is a schematic diagram of the architecture of the data acquisition module according to an embodiment of the present utility model;

[0021] Figure 7 This is a schematic diagram of the architecture of the data transmission module according to an embodiment of the present invention. Detailed Implementation

[0022] The present invention will be further described below through non-limiting embodiments and in conjunction with the accompanying drawings:

[0023] like Figure 1As shown, this utility model embodiment provides a gas pipeline network data acquisition terminal with multi-level intrinsically safe power supply, including: a housing, a main control module, a multi-level voltage adjustment module, an intrinsically safe power supply module, a data acquisition module, a storage module, and a data transmission module. The housing adopts a waterproof and dustproof design to protect the internal circuitry from external environmental interference, while meeting IP68 protection and explosion-proof requirements; the main control module is installed inside the housing as the core control unit of the acquisition terminal, responsible for data processing and command execution; the multi-level voltage adjustment module, data acquisition module, storage module, and data transmission module are electrically connected to the main control module (for simplicity of the diagram, ...). Figure 1 (The connection between the data acquisition module and the main control module is not shown in the diagram). The intrinsically safe power supply module is electrically connected to both the data acquisition module and the multi-level voltage regulation module. The multi-level voltage regulation module and intrinsically safe power supply module provide adjustable and intrinsically safe power supply. The multi-level voltage regulation module adjusts the output voltage according to actual needs to meet the working requirements of different equipment. The intrinsically safe power supply module adopts an intrinsically safe circuit design to ensure that no sparks or high temperatures are generated in fault conditions, avoiding dangers such as explosions. The data acquisition module is responsible for collecting and monitoring various parameters within the gas pipeline network, such as pressure, flow rate, temperature, and gas. The data acquisition module collects various parameters within the gas pipeline network through various mature existing technology interfaces. The storage module and data transmission module are responsible for storing and remotely transmitting the collected data. The storage module uses a separate FLASH chip, which communicates with the microcontroller via SPI to meet the storage requirements of the embedded system. The storage module stores the collected data and the terminal's operation logs for subsequent analysis and processing. The data transmission module is responsible for uploading the gas pipeline network data to the monitoring platform for data analysis. It can also receive commands from the platform to control the gas pipeline network's operation functions, using a 4G module or NB module for wireless remote data communication. The main control module preferably uses an MCU control unit.

[0024] like Figure 2 , 3As shown, the multi-level voltage regulation module includes a current sampling circuit, a voltage conversion circuit, a level control circuit, and an output sampling feedback circuit. The output of the current sampling circuit is electrically connected to the input of the voltage conversion circuit. The output of the voltage conversion circuit is electrically connected to both the input of the level control circuit and the input of the output sampling feedback circuit. The outputs of the level control circuit and the output of the output sampling feedback circuit are also electrically connected to the input of the voltage conversion circuit. The input of the current sampling circuit is the power supply, and the output of the output sampling feedback circuit is the power output. The output sampling feedback circuit uses a conventional circuit structure. The voltage conversion circuit uses a DC-DC chip circuit, and the level control circuit uses a digital potentiometer circuit. The output of the DC-DC chip circuit is electrically connected to the anode of diode D1. The cathode of diode D1 is electrically connected to both the input of the output sampling feedback circuit and the input of the digital potentiometer circuit. Diode D1's unidirectional conduction, in conjunction with the DC-DC chip circuit, prevents backflow in subsequent circuits and reduces unnecessary losses. The current sampling circuit includes a precision sampling resistor R5 connected in parallel and a current amplifier chip. The precision sampling resistor R5 is connected in series in the current acquisition circuit, and the current flowing into the circuit is converted into a voltage signal and output to the current amplifier chip for processing. The VCC input power supply is electrically connected to one end of resistor R1 and the source S of P-channel MOSFET Q1. The gate G of P-channel MOSFET Q1 is electrically connected to the other end of resistor R1 and one end of resistor R2. The drain D of P-channel MOSFET Q1 is electrically connected to the precision sampling resistor R5 and the current amplifier chip. The other end of resistor R2 is electrically connected to the collector of NPN transistor Q2. The base of NPN transistor Q2 is electrically connected to one end of resistor R3 and one end of resistor R4. The emitter of NPN transistor Q2 and the other end of resistor R4 are connected to PG (power ground). The other end of resistor R3, the current amplifier chip, and the digital potentiometer circuit are electrically connected to the MCU control unit. NPN transistor Q2 drives and controls P-channel MOSFET Q1. The driving threshold of P-channel MOSFET Q1 is set using NPN transistor Q2 as the driving circuit to achieve the GPIO level of the MCU control unit driving P-channel MOSFET Q1. Resistors R1 and R2 together form a reasonable turn-on threshold voltage for P-channel MOSFET Q1. Resistor R3 limits current to prevent damage to NPN transistor Q2, and resistor R4 is a pull-down resistor to ensure the base level of NPN transistor Q2, guaranteeing reliable control of NPN transistor Q2. When the MCU control unit output is high, NPN transistor Q2 conducts, the gate of P-channel MOSFET Q1 is pulled low and conducts, and VCC power is on. When the MCU control unit output is low, NPN transistor Q2 does not conduct, P-channel MOSFET Q1 does not conduct, and VCC power is not on.

[0025] The current sampling circuit monitors the current supplied to the external power supply. The current passes through a precision sampling resistor R5, and the amplified voltage signal is transmitted to the MCU control unit via a current amplifier chip. When excessive current is detected, the MCU control unit sends a signal to turn off the P-channel MOSFET Q1, automatically stopping the external power supply to ensure circuit safety. The voltage conversion circuit uses a high-efficiency DC-DC chip to convert the input voltage into an adjustable output voltage. The range control circuit controls the most suitable output voltage range based on preset range settings and real-time load monitoring. The MCU control unit controls the digital potentiometer circuit to adjust the feedback resistor of the DC-DC chip circuit to achieve the set voltage range, enabling DC 5~24V output. The output sampling feedback circuit feeds back to the voltage conversion circuit via a feedback signal line to adjust the output voltage within the normal range. The sampled voltage output changes according to load variations, and the output voltage is adjusted based on the voltage value feedback to ensure that the output voltage does not change with load variations. Furthermore, the multi-range voltage adjustment module can be expanded to accommodate multiple channels, such as... Figure 3 The circuit structure shown can be expanded so that multiple circuits can operate independently without interfering with each other, thus satisfying multi-output scenarios.

[0026] like Figure 4 , 5As shown, the intrinsically safe power supply module includes a current-limiting circuit, a voltage-limiting circuit, and an isolation circuit connected in sequence. The current-limiting circuit includes a self-resetting fuse F1 and a current-limiting resistor R6 connected in series. The self-resetting fuse F1 is connected to the voltage output of the multi-level adjustment module. The current-limiting resistor R6 is electrically connected to the voltage-limiting circuit. The voltage-limiting circuit includes Zener diodes Z1, Z2, Z3, and Z4 connected in parallel. The voltage-limiting circuit is connected in series with the isolation circuit, which is existing technology and uses an isolation transformer. The current-limiting circuit limits the current in the circuit to prevent overload. The current passes through the resettable fuse F1 and the current-limiting resistor R6. When the current is too high, the resettable fuse F1 automatically trips, the voltage drop across the current-limiting resistor R6 increases, and the current-limiting resistor R6 consumes some power, which is dissipated as heat, reducing the load voltage and thus reducing the current, ensuring the stability and safety of the circuit. The voltage-limiting circuit limits the voltage level in the circuit to prevent overvoltage. When the voltage exceeds the set safe value, it is regulated by Zener diodes Z1, Z2, Z3, and Z4 to ensure that the output voltage of the power supply is within a safe range. The isolation circuit electrically isolates the intrinsically safe power supply module from other non-intrinsically safe circuits to improve safety. Electrical isolation is achieved through an isolation transformer, ensuring that the circuit is completely isolated and unaffected, suppressing interference, improving the stability and reliability of the circuit, and effectively blocking DC and AC currents in the circuit, thereby preventing sparks or high temperatures caused by circuit faults or short circuits, and ensuring the safety of the circuit in explosive gas environments. Furthermore, the intrinsically safe power supply module features a low-power design to reduce energy consumption and extend the terminal's lifespan. The front-end current sampling circuit uses a P-channel MOSFET Q1 to control the on / off state of each channel. When data needs to be collected from a particular channel, the MCU control unit activates the intrinsically safe circuit module for that channel to supply power for data acquisition. After acquisition, the intrinsically safe circuit module for that channel is automatically deactivated. This process of activating the module for each channel being sampled reduces power loss, achieving low power consumption and extended lifespan. Simultaneously, the intrinsically safe power supply module can be freely expanded to meet multi-output requirements, allowing for multiple outputs such as... Figure 5 The circuit structure shown is extended.

[0027] like Figure 6 As shown, the data acquisition module includes a communication interface and acquisition devices electrically connected to the communication interface. The communication interface includes, but is not limited to, interfaces such as RS485, RS232, TTL serial port, I2C, and analog input, supporting all commonly used device communication protocols on the market. The acquisition devices include, but are not limited to, flow meters, pressure sensors, temperature sensors, and gas sensors, monitoring data such as flow rate, pressure, temperature, and gas concentration within the gas pipeline network, and transmitting the acquired data to the main control module. The main control module performs data parsing and processing, and then sends the processed data to the storage module for data storage.

[0028] like Figure 7 As shown, the data transmission module includes either a wired or wireless transmission module. The data transmission module uses wired or wireless methods, employing encryption and following a defined communication protocol, to upload the collected gas pipeline network data to a remote monitoring platform for further data display and analysis. Simultaneously, it can receive control commands from the monitoring platform, enabling data linkage and interaction, achieving a truly interconnected and interactive effect.

[0029] This utility model embodiment is simple in principle. By integrating multi-level voltage regulation, intrinsically safe power supply design, and highly reliable data acquisition capabilities, it solves problems in existing technologies such as single voltage output, unsafe power supply methods, unstable data acquisition, and a limited number of acquisition devices. Furthermore, the multi-level voltage regulation module and intrinsically safe power supply module can be freely expanded according to user needs, meeting the complex usage scenarios of multiple devices and situations, thus improving the reliability and safety of gas pipeline network monitoring. This acquisition terminal has broad application prospects and market value, and is of great significance for promoting the intelligent development of the gas industry.

[0030] The other parts in this embodiment are all existing technologies and will not be described in detail here.

Claims

1. A gas pipeline network data acquisition terminal with multi-level intrinsically safe power supply, comprising a main control module, characterized in that, The main control module is electrically connected to the multi-level voltage regulation module, the data acquisition module, the storage module, and the data transmission module, respectively. The intrinsically safe power supply module is electrically connected to the data acquisition module and the multi-level voltage regulation module, respectively. The multi-level voltage regulation module includes a current sampling circuit, a voltage conversion circuit, a level control circuit, and an output sampling feedback circuit. The output terminal of the current sampling circuit is electrically connected to the input terminal of the voltage conversion circuit. The output terminal of the voltage conversion circuit is electrically connected to the input terminal of the level control circuit and the input terminal of the output sampling feedback circuit, respectively. The output terminal of the level control circuit and the output terminal of the output sampling feedback circuit are electrically connected to the input terminal of the voltage conversion circuit, respectively. The input terminal of the current sampling circuit is the input power supply, and the output terminal of the output sampling feedback circuit is the power output. The intrinsically safe power supply module includes a current limiting circuit, a voltage limiting circuit, and an isolation circuit connected in sequence.

2. The gas pipeline network data acquisition terminal with multi-level intrinsically safe power supply according to claim 1, characterized in that, The voltage conversion circuit uses a DC-DC chip circuit, and the gear control circuit uses a digital potentiometer circuit. The output terminal of the DC-DC chip circuit is electrically connected to the positive terminal of diode D1, and the negative terminal of diode D1 is electrically connected to the input terminal of the output sampling feedback circuit and the input terminal of the digital potentiometer circuit, respectively. The current sampling circuit includes a precision sampling resistor R5 connected in parallel and a current amplifier chip. The VCC input power supply is electrically connected to one end of resistor R1 and the source S of P-channel MOSFET Q1, respectively. The gate G is electrically connected to the other end of resistor R1 and one end of resistor R2. The drain D of P-channel MOSFET Q1 is electrically connected to precision sampling resistor R5 and current amplifier chip. The other end of resistor R2 is electrically connected to the collector of NPN transistor Q2. The base of NPN transistor Q2 is electrically connected to one end of resistor R3 and one end of resistor R4. The emitter of NPN transistor Q2 and the other end of resistor R4 are connected to power supply ground. The digital potentiometer circuit, current amplifier chip, and the other end of resistor R3 are electrically connected to the main control module.

3. The gas pipeline network data acquisition terminal with multi-level intrinsically safe power supply according to claim 1, characterized in that, The current limiting circuit includes a self-resetting fuse F1 and a current limiting resistor R6 connected in series. The current limiting resistor R6 is electrically connected to the voltage limiting circuit, which includes Zener diodes Z1, Z2, Z3, and Z4 connected in parallel. The isolation circuit uses an isolation transformer.

4. A gas pipeline network data acquisition terminal with multi-level intrinsically safe power supply according to claim 1, characterized in that, The data acquisition module includes a communication interface and acquisition devices electrically connected to the communication interface. The communication interface includes an RS485 interface, an RS232 interface, a TTL serial port, an I2C interface, and an analog interface. The acquisition devices include a flow meter, a pressure sensor, a temperature sensor, and a gas sensor.

5. A gas pipeline network data acquisition terminal with multi-level intrinsically safe power supply according to claim 1, characterized in that, The data transmission module includes a wired transmission module or a wireless transmission module.

6. A gas pipeline network data acquisition terminal with multi-level intrinsically safe power supply according to any one of claims 1-5, characterized in that, The main control module uses an MCU control unit.

7. A gas pipeline network data acquisition terminal with multi-level intrinsically safe power supply according to claim 6, characterized in that, The system includes a housing, in which the main control module, multi-level voltage regulation module, data acquisition module, storage module, data transmission module, and intrinsically safe power supply module are installed.

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