CN216955933U - Pipeline gas sensor test calibration equipment and control system - Google Patents

Abstract

The utility model relates to a pipeline gas sensor test calibration device and a control system, which comprise a cabinet body, and a control box, a vacuum pump, a gas bottle, a collection sensor, a test platform, a simulation pipeline, a sealing joint, a pressure transmitter and an upper computer which are arranged on the cabinet body. The utility model realizes the automatic control of the testing process of the pipeline gas sensor and the automatic acquisition and reading of data in the testing process of the sensor, improves the testing efficiency of the gas sensor, reduces the safety risk caused by misoperation, designs the acquisition and monitoring measures of toxic, harmful, flammable and explosive gases, automatically stops the machine under the condition that dangerous gases exceed standards, starts the ventilation equipment and reduces the risk of human body injury caused by harmful and toxic gases.

Description

Pipeline gas sensor test calibration equipment and control system

Technical Field

The utility model relates to the technical field of mining equipment, in particular to a pipeline gas sensor testing and calibrating device and a control system for the pipeline gas sensor testing and calibrating device.

Background

Due to the special use environment of the pipeline type sensor: 1. high flow rate of gas in the pipeline; 2. the pressure value in the pipeline changes (namely positive pressure: 30kPa (gauge pressure) to negative pressure: -100kPa (gauge pressure), the use environment of the pipeline type sensor can not be met under the normal test environment, and the product defects can not be detected during the test.

The testing and calibration system for the pipeline gas sensor in the prior art has the following defects:

(1) most of the gases used in the calibration are toxic, harmful, flammable and explosive gases, and the tail gas after use is not discharged and treated, so that the human body is easily damaged;

(2) the automation degree of the test process is low, each control unit cannot realize linkage, and the operation efficiency is low;

(3) no monitoring and leakage prevention measures are taken for toxic, harmful, inflammable and explosive gases, and no protection measures and emergency measures are taken for emergencies such as electric leakage, halt, motor abnormity and the like;

(4) the data reading and displaying can not be carried out due to the common single-machine work;

(5) the pressure change and the flow speed change in the use environment of the pipeline sensor cannot be simulated;

(6) the gas sensor testing and calibrating process needs more links of artificial participation, has low efficiency and potential safety hazard, and cannot simulate the use environment.

SUMMERY OF THE UTILITY MODEL

The utility model provides a pipeline gas sensor testing and calibrating device, a control system for the pipeline gas sensor testing and calibrating device and a control method for the pipeline gas sensor testing and calibrating control system, which are used for calibrating and testing gas sensors such as a pipeline laser methane sensor, a pipeline carbon monoxide sensor, a pipeline oxygen sensor and the like and transmitters thereof (hereinafter collectively referred to as gas sensors) and monitoring environmental parameters such as pressure, flow speed and the like in a pipeline in real time, realizing automatic control of the testing process of the pipeline gas sensors and automatic acquisition and reading of sensor testing process data, improving the testing efficiency of the gas sensors, reducing safety risks caused by misoperation, designing acquisition and monitoring measures of toxic, harmful, inflammable and explosive gases, automatically stopping under the condition that dangerous gases exceed standards, and starting ventilation equipment, the risk of human body being hurt by harmful and toxic gas is reduced, protective safety measures such as leakage protection, short-circuit protection, overload, short circuit and phase failure of the motor are designed, and safety measures for dealing with sudden situations are designed.

The utility model is realized by the following technical scheme:

the utility model provides a pipeline gas sensor test calibration device which comprises a cabinet body, and a control box, a vacuum pump, a gas bottle, an acquisition sensor, a test platform, a simulation pipeline, a sealing joint, a pressure transmitter and an upper computer which are arranged on the cabinet body;

the upper computer is used for sending control commands and acquiring process data;

the simulation pipeline is connected with an upper computer, the gas bottle and the vacuum pump are respectively connected with the simulation pipeline, the sealing joints are distributed on the simulation pipeline and communicated with the inner cavity of the simulation pipeline, the pressure transmitter is arranged at the inlet end of the simulation pipeline, the gas bottle is used for providing gas samples with different concentrations and different types, the vacuum pump is used for vacuumizing the simulation pipeline, the sealing joints are used for installing a sensor to be tested, and the pressure transmitter is used for acquiring pressure data in the pipeline and transmitting the pressure data to the upper computer for state judgment;

the test platform is arranged on one side of the simulation pipeline, a plurality of ammeters and a plurality of cable connectors are arranged on the test platform, the cable connectors are used for realizing power supply of the sensor to be tested and communication with equipment, and the ammeters are used for measuring the working current value of the sensor to be tested;

the acquisition sensor is connected with the upper computer and is used for acquiring the concentration of the hazardous gas in the environment for the upper computer to judge;

and the control box is respectively connected with the vacuum pump, the acquisition sensor, the test platform, the pressure transmitter and the upper computer and provides power for each mechanism.

In order to enable the gas in the simulation pipeline to form upward gas flow, a plurality of gas guide plates for guiding the gas flow into each sealing joint are arranged in the simulation pipeline.

In order to accurately collect the dangerous gas inside and outside the cabinet body and ensure the safety, the collecting sensor comprises a first collecting sensor and a second collecting sensor, the first collecting sensor is installed in the cabinet body and used for collecting the concentration of the dangerous gas in the cabinet body, and the second collecting sensor is installed outside the cabinet body and used for collecting the concentration of the dangerous gas in the environment outside the cabinet body.

In order to move the equipment conveniently, the bottom of the cabinet body is provided with universal wheels.

The utility model also provides a pipeline gas sensor testing and calibrating control system, which is used for the pipeline gas sensor testing and calibrating equipment and comprises an upper computer, a sensor, a relay control panel, a gas pressure sensor, a communication protocol board, a pipeline gas circuit and an execution element;

the upper computer is used for sending a control command;

the sensor is connected with the upper computer and is used for collecting the concentration of the hazardous gas in the environment for the upper computer to judge;

the relay control board is respectively connected with the upper computer and the execution element and used for receiving a control command of the upper computer and realizing the control of the execution element;

the gas pressure sensor is respectively connected with the upper computer and the pipeline gas path and is used for collecting pressure data in the pipeline gas path and transmitting the pressure data to the upper computer for state judgment;

the communication protocol board is respectively connected with the upper computer and the sensor to be detected and is used for converting the working current value and the gas concentration value of the sensor to be detected and then sending the converted values to the upper computer for displaying;

the actuating element is connected with the pipeline air path, the pipeline air path is used for installing a sensor to be detected, and the actuating element realizes on-off control of the pipeline air path.

The control method of the pipeline gas sensor testing and calibrating system comprises the following steps:

(1) mounting a sensor to be tested on a sealing joint of a pipeline gas path;

(2) the upper computer controls the vacuum pump to continuously pump air in the pipeline air path until the air path is in a vacuum state;

(3) the upper computer releases the gas in the gas bottle and controls the actuating element and the diaphragm pump to realize gas circulation in the pipeline gas path;

(4) the gas pressure sensor collects pressure data in a pipeline gas path and transmits the pressure data to the upper computer for state judgment;

(5) the communication protocol board converts the working current value and the gas concentration value of the sensor to be tested and then sends the converted values to the upper computer for displaying, and a tester judges whether the sensor to be tested is qualified or not according to the display of the sensor to be tested in different test states until the whole test process is completed;

(6) the sensor gathers the hazardous gas concentration in the environment, and when the hazardous gas in the environment exceeded the setting value, the host computer sent shut down the order immediately and closed valve, executive component, prevented that gas from revealing.

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

(1) the utility model reduces the manpower input in the testing link, improves the testing efficiency, eliminates the potential safety hazard and realizes the aim of improving the product percent of pass;

(2) the automation degree of the pipeline gas sensor test is improved, each data parameter can be displayed on the operation screen by adopting a visual display method, and the operation difficulty of the equipment is reduced. Linkage is realized among all the execution elements, so that safety risk caused by misoperation is avoided, and the operation efficiency is improved;

(3) the method is used for monitoring toxic, harmful, inflammable and explosive gases and preventing leakage, and is used for protecting and emergency measures against sudden conditions such as electric leakage, halt, motor abnormity and the like. The safety factor of equipment operation is greatly improved;

(4) key parameters such as pressure change, flow rate change and the like of gas in a pipeline are simulated, so that the product can expose the problem defect in the testing stage, and the problem product is prevented from flowing to the market;

(5) and testing environments are provided for sensors of other pipeline types.

Drawings

FIG. 1 is a schematic perspective view of a pipeline gas sensor test calibration device according to the present invention;

FIG. 2 is a front view of the pipeline gas sensor test calibration apparatus of the present invention;

FIG. 3 is a schematic diagram of the structure inside a simulated pipe of the present invention;

FIG. 4 is a functional block diagram of the pipeline gas sensor test calibration control system of the present invention;

FIG. 5 is a schematic circuit diagram of the pipeline gas sensor test calibration control system of the present invention.

Detailed Description

The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the present invention more comprehensible and clear for those skilled in the art, and thus define the scope of the present invention more clearly. The directional terms used in the present invention, such as "up", "down", "front", "back", "left", "right", "top", "bottom", "side", "end", etc., refer to the directions of the attached drawings. Accordingly, the directional terminology is used for purposes of illustration and understanding and is in no way limiting.

The pipeline gas sensor testing and calibrating equipment shown in fig. 1 and 2 comprises a cabinet body 1, a control box 9 arranged on the cabinet body 1, a vacuum pump 5, a gas bottle 4, a collecting sensor, a testing platform 6, a simulation pipeline 3, a sealing joint 11, a pressure transmitter 10, an upper computer 2 and the like.

The details will be described below.

(1) Upper computer

The operation of the whole device is uniformly scheduled and controlled by the upper computer 2, a control command and process data acquisition are sent through the RS485 serial port, and the upper computer 2 is provided with a display operation screen.

(2) Simulated pipeline

The simulation pipeline 3 is connected with the upper computer 2 and the gas bottle 4 and is used for conveying standard gas samples with different concentrations and discharging waste gas after testing. A plurality of gas guide plates 18 for guiding gas flow into each sealing joint 11 above are arranged in the simulation pipeline 3, as shown in fig. 3, the length of each gas guide plate 18 is gradually lengthened from the inlet end to the outlet end of the simulation pipeline 3, the bottom end of each gas guide plate 18 is in a hook shape, when gas in the simulation pipeline 3 moves from the right end to the left end, gas molecules flow to the gas guide plates 18 to cause upward gas flow, and the gas can more easily enter the sealing joints 11 and the sensor 16 to be measured.

(3) Vacuum pump

The vacuum pump 5 is connected with the simulation pipeline 3, and pumps air in the simulation pipeline 3 to form a vacuum environment in the pipeline. The vacuum pump 5 is provided with a contactor, and the working state of the vacuum pump is controlled by controlling the suction and release of the contactor. The vacuum pump 5 is provided with a thermal overload relay for protecting the vacuum pump 5.

(4) Pressure transmitter

Install in the inlet end of simulation pipeline 3, gather the pressure data transfer in the simulation pipeline 3 and carry out state judgement to the host computer, set up pointer-type manometer on the pressure transmitter, use as standard manometer for calibration pressure transmitter numerical value.

(5) Control box

The 24V, 12V and 5V switching power supply is used as a power supply to supply power for related electrical equipment. The control box 9 is provided with an emergency stop button for powering off the actuator in an emergency state.

(6) Current meter

The ammeter 7 is provided with a plurality of ammeter parts, and is installed on the test platform 6 for measuring the working current value of the sensor 16 to be measured.

(7) Cable connector

The cable connector 8 has a plurality of connectors for connecting the sensor 16 to be measured and the device, and supplies power to the sensor 16 to be measured and communicates with the device.

(8) Sealing joint

Sealing joint 11 has a plurality ofly, evenly installs on simulation 3 tops of pipeline to communicate with 3 inner chambers of simulation pipeline, the sensor 16 that awaits measuring realizes compressing tightly, fixing, sealing through hold-down mechanism cooperation airtight rubber circle. The sealing joint 11 is provided with an electromagnetic valve.

(9) Universal wheel

The universal wheels 15 are used for the overall movement of the device.

(10) Sensor to be measured

The sensor under test 16 is a gas sensor to be tested, a subject of use of the apparatus.

(11) Collection sensor (methane and carbon monoxide sensor)

The collecting sensor comprises a first collecting sensor 14 and a second collecting sensor 12, the first collecting sensor 14 is installed in the cabinet body 1 and used for collecting the concentration of the dangerous gas in the cabinet body 1, and the second collecting sensor 12 is installed outside the cabinet body 1 through a support 13 and used for collecting the concentration of the dangerous gas in the environment outside the cabinet body 1.

(11) Leakage protection air switch

The leakage protection air switch 17 is installed in the cabinet body 1 and used for leakage protection and short circuit protection of the power supply.

(12) Diaphragm pump

Is connected with the simulation pipeline 3 and is used for realizing the circulation of the gas in the simulation pipeline 3.

(13) Gas bottle

The gas bottles 4 were supplied as gas samples of different concentrations for use in the plant test.

A pipeline gas sensor test calibration control system as shown in fig. 4, which is used for the pipeline gas sensor test calibration device, includes an upper computer, a sensor, a relay control panel, a gas pressure sensor, a communication protocol board, a pipeline gas circuit and an execution element, and the circuit principle is as shown in fig. 5.

Specifically, the method comprises the following steps:

the upper computer is used for sending a control command to realize operation and display;

the sensor is connected with the upper computer and used for collecting the concentration of the dangerous gas in the environment for the upper computer to judge;

the relay control board is respectively connected with the upper computer and the execution element and used for receiving a control command of the upper computer and realizing the control of the execution element;

the gas pressure sensor (pressure transmitter) is respectively connected with the upper computer and the pipeline gas circuit and is used for collecting pressure data in the pipeline gas circuit and transmitting the pressure data to the upper computer for state judgment;

the communication protocol board is respectively connected with the upper computer and the sensor to be detected, converts a private protocol of the sensor to be detected into a modbus-rtu open protocol, and is used for converting a working current value and a gas concentration value of the sensor to be detected and then sending the converted working current value and the converted gas concentration value to the upper computer for displaying;

the actuating element is connected with the pipeline air path, the pipeline air path is used for installing a sensor to be detected, and the actuating element realizes on-off control of the pipeline air path.

The working principle of the utility model is as follows:

the utility model is suitable for the calibration of the GJG100J (C) pipeline laser methane sensor, the GTH1000(C) pipeline carbon monoxide sensor, the GYH25G pipeline oxygen sensor complete machine and the gas sample calibration under the absolute pressure (0-130) kPa state of the transmitter thereof and the verification of the gas sample test accuracy of different concentrations.

The device is connected with an alternating current three-phase power supply, and converts AC380V into DC24V, DC12V and DC5V through an internal switching power supply to supply power for the execution elements of the equipment. The upper computer collects the pressure value inside the simulation pipeline at the rate of 500 ms/time, the upper computer judges the test state and sends an RS485 command to the relay control panel, and the air path arrangement with different functions is completed through the suction and the release of the relay. The diaphragm pump drives the gas in the pipeline to flow.

The upper computer controls the suction and release of the contactor to control the working state of the vacuum pump. And under the working state of the vacuum pump, air in the pipeline can be continuously pumped until the vacuum state is reached. The upper computer controls the suction of the electromagnetic valve and the diaphragm pump and the air intake and gas circulation of the release control equipment.

The whole machine (or the probe) is an independent testing unit, independent power supply and data acquisition are realized, and the maximum testing quantity is 7. And a visual display method is adopted, and when the whole machine of the station is in a test state, the icon and the acquired data are displayed. And if no data is uploaded, the data is not displayed.

And the communication protocol board converts the working current value and the gas concentration value of the sensor and then sends the converted values to an upper computer for displaying. And (4) judging whether the sensor is qualified or not according to the display of the sensor in different test states by a tester until the whole test process is completed. The upper computer is provided with a plurality of adjustable alarm points, so that the safety requirements of different gas concentrations are met. A plurality of adjustable calibration points are also arranged, and the test requirements of testers under different pressures are met.

The upper computer collects concentration values of gas and carbon monoxide in the environment and the cabinet body at a rate of 500 ms/time. When the dangerous gas in the environment exceeds a set value, a shutdown command is immediately sent to close the valve, the execution element prevents gas leakage, and damage expansion is prevented from continuing to expand.

The sensor to be tested is in butt joint with the pipeline through the pressing mechanism, and the embedded structure of the airtight rubber gasket is designed at the sealing joint part of the pipeline, so that the butt joint airtightness is ensured. The gas guide plate is arranged in the pipeline, when gas flows in the pipeline, gas molecules flow to the gas guide plate to cause upward airflow, so that the gas is easier to diffuse in the sensor to be measured.

The leakage protection and circuit protection of the equipment are realized through the leakage protection air switch. The overload, short circuit and open-phase protection of the motor is realized by connecting a thermal overload relay in series in a vacuum pump circuit. The emergency stop button is used for disconnecting the power supply of the actuating element, so that the emergency situation can be dealt with, and the safety factor of the equipment can be further improved.

And an atom cover is arranged above the equipment, and the leaked gas of the equipment is forcibly pumped away by a fan and is exhausted to the outside of the gas aging test room through an exhaust pipeline. Emergency measures in emergency situations are added. When the explosion-proof fan enters the operation interface, the explosion-proof fan automatically enters an air draft state, and the leakage risk is further reduced.

Before electrifying, checking 1, and performing a gas pressure maintaining test; 2. the history of the measurements taken by the mechanical pressure gauge is recorded and the operating instructions are carefully read.

Installing a measured sensor: and (3) taking down the sealing joints of 1# to 7# (the maximum can simultaneously measure 7 complete machines or 7 probes) of the equipment. And (3) connecting a test complete machine or a probe into the simulation pipeline and ensuring the sealing property of the simulation pipeline. (if the road test is not used, please ensure that the sealing plug is firmly installed)

Connecting a sensor test power supply: and a test power supply (the whole machine is connected with a 5-core aviation plug in a test mode, and the probe is connected with a 4-core aviation socket in a test mode) connected with the sensor.

Connecting a test power supply: the three-phase power plug is plugged into a three-phase electrical socket.

Connecting a test gas bottle: and the connecting pipeline of the gas bottle is arranged on the simulation pipeline, so that the valve of the gas bottle is opened after the connection is firm and gas-tight.

The control method of the utility model comprises the following steps:

(1) after the three-phase power supply is switched on, the leakage protection switch is turned on, the operation display screen displays an initial interface, and whether the display values of the following instruments are abnormal or not is checked:

a) the 1# to 14# ampere meters are normally on, and the display value is the current of the power supply of the current loop;

b) the mechanical pressure gauge returns to 0.

(2) And selecting a sensor test or a sensitive element test on the initial interface according to the current test item and then entering a test interface. The interface ' display air pressure ' should be 0kpa, and ' operation prompt: "should be" on standby ". The following values were checked for normality:

a) the display screen displays that the pressure value in the pipeline is consistent with the mechanical pressure gauge;

b) the methane or carbon monoxide sensors 1-2 should display a current ambient gas concentration value of 0;

c) and (4) closing the 1# to 5# valves, and stopping the vacuum pump and the diaphragm pump.

(3) And (4) observing whether the communication of the sensor is abnormal or not after entering a test interface (if the icon is not displayed, the communication of the test equipment is abnormal, and the icon is displayed frequently when the communication of the equipment is normal). If the communication is abnormal, whether the circuit is reliably connected is checked, and the communication parameters of the sensor are as follows: RS485 mode, address: 1, baud rate: 9600.

(4) pressing the ' vacuumizing ' in the test interface, and then ' operating and prompting: "should be" evacuated ". The vacuum pump starts to work, air in the pipeline is extracted, the air pressure is reduced to negative pressure until the negative pressure exceeds the limit value (default is-100 kpa, and the value can be set in the air path control group).

(5) And pressing the vacuum-pumping device again to pump the air between the gas bottle and the solenoid valve 1#, wherein the whole testing device is in a vacuum state. Step (5) is the first test step, and the subsequent test gas bottle and valve 1 are filled with test gas. Step (5) may be skipped.

(6) And opening a valve of the gas cylinder, and automatically entering a gas sample suction state (without operation) by the tool at the moment. At this time, the diaphragm pump is started, the test gas flows in the simulation pipeline, the air pressure in the pipeline rises until the positive pressure exceeds the limit value (the default is 30kpa, the value can be set in the air passage control group), and at this time, the equipment enters a 'test starting' state (operation is not needed). At this point "valve 1" is closed and the device is not drawing a gas sample.

(7) The pressure of the gas in the pipeline can be adjusted by pressing the vacuum-pumping device. The gas pressure in the pipeline is at the calibration point 1': (10kpa) +2kpa, "calibration point 2": (-10kpa) +2kpa, "calibration point 3": (-30kpa) +2kpa, "calibration point 4": (-50kpa) +2kpa, "calibration point 5": (-70kpa) +2kpa (calibration point settable), the fall stops within the range. The 'air pressure fine adjustment' button can be pressed to finely adjust the air pressure in the pipeline. And testing the sensor according to the testing requirements of the element and the whole machine.

(8) And after the sensor to be tested is tested, pressing a button for injecting air in the test interface. At the moment, the test gas in the pipeline is completely discharged out of the tool, external air enters, and after the air pressure rises to 0kpa, a stop button is pressed. At this time, the valves of the apparatus are all closed, and the state is "standby". The test sensor can be replaced, and the next batch of tests can be carried out.

After the test was completed, the valve of the gas bottle was closed. In the control parameter, the valve 1 is pressed to open, and the gas pressure is released. The plug of the three-phase power supply is pulled off, and the blocking piece of the pipeline is reset. If the vacuum pump cannot be started normally, whether the starter in the control box is closed or not should be checked. If the interface has a gas concentration overrun fault, an emergency stop button is immediately pressed to check whether the gas pipeline leaks.

In the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "disposed," "provided," and the like are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.

Claims (5)

1. A pipeline gas sensor test calibration device is characterized by comprising a cabinet body, a control box, a vacuum pump, a gas bottle, an acquisition sensor, a test platform, a simulation pipeline, a sealing joint, a pressure transmitter and an upper computer, wherein the control box, the vacuum pump, the gas bottle, the acquisition sensor, the test platform, the simulation pipeline, the sealing joint, the pressure transmitter and the upper computer are arranged on the cabinet body;

the upper computer is used for sending control commands and collecting process data;

the simulation pipeline is connected with an upper computer, the gas bottle and the vacuum pump are respectively connected with the simulation pipeline, the sealing joints are distributed on the simulation pipeline and communicated with the inner cavity of the simulation pipeline, the pressure transmitter is arranged at the inlet end of the simulation pipeline, the gas bottle is used for providing gas samples with different concentrations and different types, the vacuum pump is used for vacuumizing the simulation pipeline, the sealing joints are used for installing a sensor to be tested, and the pressure transmitter is used for acquiring pressure data in the pipeline and transmitting the pressure data to the upper computer for state judgment;

the test platform is arranged on one side of the simulation pipeline, a plurality of ammeters and a plurality of cable connectors are arranged on the test platform, the cable connectors are used for realizing power supply of the sensor to be tested and communication with equipment, and the ammeters are used for measuring the working current value of the sensor to be tested;

the acquisition sensor is connected with the upper computer and is used for acquiring the concentration of the hazardous gas in the environment for the upper computer to judge;

and the control box is respectively connected with the vacuum pump, the acquisition sensor, the test platform, the pressure transmitter and the upper computer and provides power for each mechanism.

2. The duct gas sensor test calibration apparatus of claim 1, wherein a plurality of gas deflectors are provided within the simulated duct for directing gas flow into each sealing joint.

3. The pipeline gas sensor test calibration device according to claim 1, wherein the collection sensors comprise a first collection sensor and a second collection sensor, the first collection sensor is mounted inside the cabinet body and used for collecting the concentration of the hazardous gas inside the cabinet body, and the second collection sensor is mounted outside the cabinet body and used for collecting the concentration of the hazardous gas in the environment outside the cabinet body.

4. The pipeline gas sensor test calibration equipment according to claim 1, wherein universal wheels are arranged at the bottom of the cabinet body.

5. A pipeline gas sensor testing and calibration control system is characterized in that the system is used for the pipeline gas sensor testing and calibration equipment according to any one of claims 1 to 4, and comprises an upper computer, a sensor, a relay control panel, a gas pressure sensor, a communication protocol board, a pipeline gas circuit and an execution element;

the upper computer is used for sending a control command;

the sensor is connected with the upper computer and used for collecting the concentration of the dangerous gas in the environment for the upper computer to judge;

the relay control board is respectively connected with the upper computer and the execution element and used for receiving a control command of the upper computer and realizing the control of the execution element;

the gas pressure sensor is respectively connected with the upper computer and the pipeline gas path and is used for collecting pressure data in the pipeline gas path and transmitting the pressure data to the upper computer for state judgment;

the communication protocol board is respectively connected with the upper computer and the sensor to be detected and is used for converting the working current value and the gas concentration value of the sensor to be detected and then sending the converted values to the upper computer for displaying;

the actuating element is connected with the pipeline air path, the pipeline air path is used for installing a sensor to be detected, and the actuating element realizes on-off control of the pipeline air path.

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