809results about "Pressure difference measurement between multiple valves" patented technology

The invention discloses an intelligent gas micro-differential pressure monitoring system based on multi-sensor fusion, and relates to the technical field of gas micro-differential pressure monitoring, a sensor network arranged at a pipeline collects and verifies process state data, a component fluctuation index is established to quantify the fluctuation degree of gas components, and if the component fluctuation index is abnormal, the component fluctuation index is determined to be abnormal. Calling a dynamic physical property compensation function to output a correction coefficient and a differential pressure reference value; if the accumulative deviation between the actually measured differential pressure and the theoretical differential pressure reference value exceeds a set threshold value, locally adjusting and optimizing or globally re-calibrating and updating the model; outputting a real-time correction value and deviation measurement through a fusion algorithm, and when an error continuously exceeds the standard, dynamically adjusting a fusion weight or triggering model calibration; if the obtained value exceeds the preset threshold value, early warning or alarming is sent out and fed back to the previous step.

The invention provides a preparation method of an island and beam film structure micro differential pressure sensor with an IC (Integrated Circuit), which comprises the following steps: arranging an N-type buried layer, a P-type buried layer and an island film structure on an SOI (Silicon On Insulator) silicon wafer, then connecting the SOI silicon wafer with a double-parabolic silicon wafer, and arranging a medium isolation groove, an N-type buried layer connecting region, a P well, a P-type buried layer connecting region, a sensitive resistor, a P-type base region, an N-type base region, an N-type emitter region and a P-type emitter region on the SOI silicon wafer. According to the invention, the preparation of the complementary bipolar transistor double-buried layer is completed by combining a semiconductor manufacturing technology and an MEMS manufacturing technology under the condition of not using an epitaxial process; the process flow is integrally simplified, and the preparation efficiency is improved.

The invention relates to the technical field of transmitters, and discloses an intelligent monocrystalline silicon pressure difference transmitter which comprises a sensor, diaphragms are arranged on the left side and the right side of the sensor, a first process flange is installed on the front side of the sensor, a second process flange is installed on the rear side of the sensor, and a machine body is fixedly connected to the upper surface of the sensor. A displayer is installed on the front side of the machine body, the sensor is electrically connected with the machine body, and an overload plugging device is arranged on the inner wall of the second process flange. The overload plugging device comprises a U-shaped guide frame, the U-shaped guide frame is installed on the inner wall of the second process flange, and the inner wall of the U-shaped guide frame is connected with a connecting rod in a sliding mode. According to the invention, through the arrangement of the overload plugging device, the interface part can be cut off when the tested pressure end of the transmitter is subjected to overlarge instantaneous pressure, so that the impact of the instantaneous pressure on the diaphragm of the tested pressure end is reduced, and the protection performance of the transmitter on the large instantaneous pressure is improved.

The invention discloses a method and equipment for monitoring the operation condition of a dust removal system and a program product. The method comprises the steps that a first current negative pressure value of the air inlet side and a second current negative pressure value of the air outlet side of a filtering device in the dust removal system are obtained; respectively compensating the first current negative pressure value and the second current negative pressure value to obtain a first current compensation negative pressure value and a second current compensation negative pressure value; calibrating the first current compensation negative pressure value and the second current compensation negative pressure value by using the calibration coefficient to obtain a calibrated first calibration negative pressure value and a calibrated second calibration negative pressure value; determining a pressure difference value between the first calibration negative pressure value and the second calibration negative pressure value by using the first calibration negative pressure value and the second calibration negative pressure value; and determining the operation condition of the filtering device in the dust removal system by using the pressure difference value. According to the embodiment of the invention, the pressure difference value between the two ends of the filtering device in the dust removal system can be accurately determined, and then the operation condition of the filtering device in the dust removal system is accurately determined.

A sensing device includes a body having a first chamber, a second chamber, and a liquid path which are filled with a liquid, the liquid path communicates with the second chamber, a pressure difference detection chip installed in the first chamber, and a pressure detection chip installed in the first chamber. The pressure difference detection chip seals an opening of the liquid path disposed on a bottom surface of the first chamber. The pressure difference detection chip detects a liquid pressure difference between the first chamber and the second chamber. The pressure detection chip detects a liquid pressure in the first chamber.

A filter device includes a housing including a columnar portion having a columnar shape and provided at a filter device including a filtration member that filters a liquid, a pressure difference detection unit provided at the housing and configured to detect a pressure difference between a pressure upstream of the filtration member and a pressure downstream thereof, a viscosity sensor configured to measure viscosity of the liquid, and a temperature sensor configured to measure a temperature of the liquid are included. A hollow portion is provided inside the columnar portion, both ends of the hollow portion being covered, the hollow portion is provided with the viscosity sensor and the temperature sensor, and a communication hole that allows the hollow portion and a space outside the housing to communicate with each other is provided in the housing.

The invention discloses an intelligent detection method and device for a cotton water miscellaneous micronaire value based on multi-source information fusion, and relates to the field of cotton quality detection.The method comprises the steps that the weight, the initial air pressure difference, the cotton sample image, the resistance value, the environment temperature and the environment humidity of a to-be-detected cotton sample are obtained; according to the initial air pressure difference and the weight, the compensated air pressure difference is determined through a weight compensation model; according to the cotton sample image, utilizing an image segmentation technology to extract the impurity area percentage and the impurity grain number of the cotton sample to be detected, and determining the impurity content of the cotton sample to be detected; according to the resistance value, the environment temperature and the environment humidity, utilizing a moisture regain prediction model to determine the moisture regain of the cotton sample to be detected; and determining the micronaire value of the cotton sample to be tested by using a Stacking ensemble learning model according to the compensated air pressure difference, impurity content and moisture regain. According to the method, the moisture regain, the impurity rate and the micronaire value of the cotton can be accurately detected in a non-standard detection environment.

The invention relates to the technical field of air conditioning treatment, in particular to an air volume monitoring method and system for a centrifugal ventilator. The method comprises the steps that the difference between all belt tension data obtained through real-time monitoring data and experiment monitoring data is analyzed; calculating the deviation degree of the air volume value of the real-time monitoring data measured based on the static pressure method under different frequencies, and obtaining the real-time air volume value; based on the fluctuation degree of the wind speed data in all the wind speed sensors, the disordered distribution condition of the fluctuation degree calculated by all the wind speed sensors and the average distribution condition of the fluctuation degree calculated at all the collection moments are utilized, the reliability of real-time wind quantity measurement based on the wind speed method is obtained, and the real-time wind quantity is determined; and the final air volume of the centrifugal fan is determined by combining the air volume values measured in real time through the static pressure method and the air speed method and the deviation degree and reliability of the respective measurement methods. The invention aims to integrate the results of the static pressure method and the wind speed method and improve the overall accuracy and reliability of the air volume measurement.

The invention relates to a multi-channel air pressure monitoring method, an adaptive monitoring circuit and computer equipment, and the method comprises the steps: synchronously collecting an original air pressure signal set in a target region through a multi-channel air pressure sensor, and carrying out the signal optimization processing, thereby obtaining an air pressure signal set; performing data analysis on a signal cluster divided by the air pressure signal set according to a channel grouping relationship to obtain an air pressure monitoring value of each channel, and calculating a differential pressure value between the channels in the cluster; and inputting the air pressure monitoring value and the differential pressure value into a two-dimensional data anomaly monitoring model of a dual-threshold system established based on historical data and environment auxiliary parameters, and outputting an anomaly judgment result and an anomaly weight ratio, so as to solve the problems of asynchronous monitoring data and high anomaly misjudgment rate in the traditional single-channel monitoring method, and improve the accuracy of the monitoring result. And the environmental stability of the target area is ensured.

The utility model relates to the technical field of sensor packaging, in particular to a batch packaging structure and a batch packaging process for sensors, the batch packaging structure comprises a substrate and a packaging cover, the windowing position of the substrate is provided with a mounting area, the mounting area is divided into a plurality of packaging stations arranged in a rectangular array, and the packaging stations are arranged on the substrate. First positioning holes are formed in two opposite sides of the mounting area of the substrate; the surface, provided with the mounting area, of the substrate is connected with a packaging layer, the packaging layer comprises a plurality of packaging tube shells, and the packaging tube shells are in one-to-one correspondence with the packaging stations; the packaging cover comprises a cover plate area, the cover plate area is provided with a plurality of window covers arranged in a rectangular array, the window covers correspond to the packaging stations one to one, windows are formed in the window covers, waterproof films are attached to the windows, second positioning holes are formed in the positions, on the two opposite sides of the installation area, of the packaging cover, and the second positioning holes are opposite to the first positioning holes in position. According to the invention, the sensors can be packaged in batches, the production efficiency is improved, and the packaging cost is reduced.

Features relating to a cartridge for use with a vaporizer body are provided. The cartridge mates with the vaporizer body in a cartridge receptacle. The cartridge may include a cartridge body defining a reservoir configured to contain vaporizable material; a mouthpiece coupled to a proximal end region of the cartridge body; at least one proximal absorbent pad wedged within an internal volume of the mouthpiece; a mouthpiece seal with sealing ribs; a cannula defining a vaporization chamber extending through the cartridge body; a resistive heating element; a porous wick configured to draw the vaporizable material in the reservoir towards the vaporization chamber; an internal sealing gasket positioned in a distal end region of the cartridge body; a lower support structure positioned in the distal end region of the cartridge body; and at least one distal absorbent pad configured to wedge within a recess located in the lower support structure.

The invention discloses a multi-component laser gas analyzer based on front-end pretreatment, and relates to the technical field of gas detection, the multi-component laser gas analyzer specifically comprises a portable box, a control panel is arranged in the portable box, and a laser gas analysis mechanism is mounted in the portable box and located at the bottom of the control panel; the problem of spectral signal distortion caused by a high-dust and high-humidity environment in industrial gas detection is solved through a front-end pretreatment self-adaptive technology, system downtime caused by single-path blockage is avoided through a double-pipeline redundancy design aiming at the high-dust and high-humidity environment, rapid dehumidification and cooling of a compression and condensation assembly are combined, and the detection efficiency is improved. According to the multi-component laser gas analyzer system, a laser gas analysis mechanism can stably obtain high-precision spectral signals under complex working conditions, meanwhile, multi-stage intelligent early warning and filter element health management are adopted in the system, the maintenance cost is reduced, the service life of equipment is prolonged, the integrated design of the portable box supports on-site rapid overhaul, and the detection efficiency of the whole multi-component laser gas analyzer is improved.

The invention discloses an air separation pressure swing intelligent adsorption pollution discharge method, system and device combined with a pressure curve, and relates to the technical field of intelligent pollution discharge. The air separation pressure swing intelligent adsorption pollution discharge method, system and device combined with the pressure curve comprises the following steps: S1, collecting running state data in real time, and preprocessing the running state data; s2, performing pressure disturbance intensity analysis on the operation state data; s3, performing real-time analysis and feature extraction on the pressure curve; s4, performing start-stop risk prediction on the operation state data; and S5, integrating the operation state data, the pressure disturbance intensity analysis result and the start-stop risk prediction result to execute a pollution discharge control instruction. The problems that an air compressor and a pressure swing adsorption system lack linkage control based on pressure change, pollution discharge easily causes pressure fluctuation and frequent starting and stopping, energy consumption is increased, equipment abrasion is caused, and an existing control mode lacks a feedforward adjusting mechanism are solved.

According to the monolithic integrated MEMS micro differential pressure chip, a plurality of first injection regions (10), a second injection region (11), an all-dielectric isolation structure (6), a collector region (8), a base region (9), an emitter region (7) and a buried layer (1) are arranged on a first SOI silicon wafer, and correspondingly matched metal leads (13) are arranged on the second injection region (11), the collector region (8), the base region (9) and the emitter region (7). A second double-parabolic silicon wafer (5) is connected to the first SOI silicon wafer, and the monolithic integrated MEMS micro differential pressure chip is prepared through photoetching, injection, annealing, etching, film forming and sputtering processes. The invention has the advantages of simple structure, convenience in preparation and the like, and provides an efficient and economical solution for manufacturing a high-performance and high-reliability MEMS pressure chip.

The invention discloses a common-film differential high-static-pressure resonant differential pressure sensor based on hot resistance driving, and relates to a pressure sensor. The invention provides a novel sensor structure based on a thermal piezoresistive effect. The sensor adopts a thermal piezoresistive effect for driving and piezoresistive detection, and comprises a low-voltage side pressure sensing film, a bonding oxide layer, a structural layer, a buried oxide layer, a high-voltage side pressure film and a substrate layer, the low-voltage side pressure sensing film is made of a silicon material, the structural layer and the high-voltage side pressure film are made of SOI sheets, and the substrate layer is made of BF33 glass; the high-pressure side pressure film and the low-pressure side pressure film respectively sense high pressure and low pressure and sense a difference value between the high pressure and the low pressure through deformation of the pressure films, deflection deformation of the films generates tensile stress in a central area and pressure stress in an edge area, the double resonators sense opposite stress and generate opposite frequency deviation, and the difference between the two is used for representing a differential pressure value. The glass substrate is mainly used for isolating thermal stress of the packaging stainless steel base.

There is provided a pressure sensor, including a top cover assembly, an upper seat (120), and a movable membrane (200); each of a top and a bottom of the upper seat (120) is provided with an opening, the top cover assembly seals the opening at the top of the upper seat, and the movable membrane (200) seals the opening at the bottom of the upper seat (120); the top cover assembly, the upper seat (120), and the movable membrane (200) form a pressure reference chamber (100), and the pressure sensor detects a gas pressure on a side of the movable membrane (200) away from the top cover assembly based on a state of the movable membrane (200); at least one gas guide passage (510) is formed at the top cover assembly, and is configured to connect the pressure reference chamber (100) to the outside; the top cover assembly includes at least one blocking member (521) configured to seal the gas guide passage (510); and the blocking member (521) seals the gas guide passage (510) after being heated to a temperature higher than a preset melting temperature to be at least partially melted and being cooled to solidify. A manufacturing method for a pressure sensor is further provided. The pressure sensor has high manufacturing efficiency, stable structure, and high pressure detection precision.

The embodiment of the invention provides a multi-channel differential pressure real-time measurement method and system, through cooperative interaction of a PS end and a PL end, the PS end receives and identifies an instruction of an upper computer, the PL end is responsible for instruction execution, corresponding closed-loop communication logic is formed, and the accuracy and reliability of data are improved. Besides, read-write parallelization is realized, two ports of the memory are controlled to perform independent data read-write through switching of identification values, read-write operations of the first port and the second port are completely separated, throughput is greatly improved, the two ports adopt a write priority mode and an independent address space design, read-write conflict risks are eliminated, and the memory performance is improved. And the number of concurrent detection channels and the detection frequency are improved.

A method includes opening a flow path from a gas stick through a variable orifice, a chamber, and an outlet isolation valve of the chamber. The method further includes causing a gas to flow through the flow path at a flow rate setpoint. The method further includes actuating an opening of the variable orifice to establish a choked pressure regime within the chamber, the choked pressure regime being achieved by causing a first pressure upstream of the variable orifice to be at least two times a second pressure downstream of the variable orifice. The method further includes closing the outlet isolation valve to cause the chamber to be filled with the gas from the gas stick. The method further includes measuring a pressure rate-of-rise within the chamber. The method further includes determining one or more flow measurements based at least in part on the pressure rate-of-rise.

The utility model belongs to the technical field of double-flange differential pressure transmitters, and discloses a double-flange differential pressure transmitter, which comprises a transmitter body, capillary tubes are connected to two sides of the transmitter body, and one end of each capillary tube is connected with a diaphragm flange; according to the utility model, through the arrangement of the storage assembly structure, the diaphragm flange is pulled outwards, so that the diaphragm flange drives the capillary tube to extend towards the outside of the storage box, the rod piece moves towards the inside of the storage box in the process, so that the fixing plate compresses the spring, and after the measurement is completed, the rod piece moves towards the inside of the storage box. When the capillary tube storage box is used, the diaphragm flange is loosened, the distance between the two connecting plates is gradually increased under the elastic force action of the spring, and therefore the capillary tube is driven by the connecting ring to move towards the interior of the storage box, automatic and rapid storage of the capillary tube is achieved, the capillary tube storage efficiency is improved, and use of an operator is facilitated.

The invention discloses a glass curtain wall monitoring system and method based on machine learning, and the system comprises an acquisition module which comprises a first acquisition unit for acquiring the real-time wind pressure value of a glass curtain wall and a second acquisition unit for acquiring the strain value of the glass curtain wall; the modeling module is connected to the acquisition module, and the modeling module establishes an agent model so as to output predicted deformation displacement of the glass curtain wall based on the real-time wind pressure value and the strain value; the time sequence analysis module is connected to the acquisition module, and the time sequence analysis module enables the real-time wind pressure values to form a time sequence and adopts a dynamic mode to decompose a dynamic change rule of modeling wind pressure so as to obtain a predicted wind pressure value; and the early warning module comprises a first early warning unit, a second early warning unit and a third early warning unit, the first early warning unit is connected to the acquisition module, the second early warning unit is connected to the modeling module, and the third early warning unit is connected to the time sequence analysis module. The problem that the cost of monitoring curtain wall glass deformation by adopting methods such as machine vision and the like of a glass curtain wall is high is solved.

A pressure control device includes a pressure control valve, a flow resistance provided downstream of the pressure control valve, a first pressure sensor for measuring a gas pressure between the pressure control valve and the flow resistance, a second pressure sensor for measuring a gas pressure downstream of the flow resistance, and a calculation control circuit connected to the first pressure sensor and the second pressure sensor, wherein the pressure control device controls the gas pressure downstream of the flow resistance by adjusting an opening degree of the pressure control valve based on an output of the second pressure sensor regardless of an output of the first pressure sensor control, and calculates the flow rate of the gas downstream of the flow resistance, based on the outputs of the first and the second pressure sensors.

The invention discloses a dual-electrode-based high-sensitivity differential pressure ceramic capacitive sensor and a measurement method thereof, and belongs to the technical field of pressure sensors. The sensor comprises a ceramic substrate, a dual-electrode structure, a differential pressure sensitive diaphragm and a signal processing module. The two electrodes are symmetrically distributed on the two sides of the diaphragm, when the diaphragm is subjected to the differential pressure effect on the two sides, capacitance changes reversely, high-sensitivity detection of the differential pressure is achieved through a differential calculation formula, and the sensitivity is improved by two times compared with a single electrode. And the ceramic plate integrates an overvoltage protection function, so that the diaphragm is prevented from over-limit deformation. The design solves the problems that a traditional sensor is low in sensitivity and weak in interference resistance in tiny differential pressure detection, and can be widely applied to the fields of industrial pressure monitoring, automobile differential pressure control, new energy battery thermal management and the like. And the reliability and the precision are remarkably improved by a dual-electrode differential structure and an overvoltage protection mechanism, and an innovative scheme is provided for the design of a high-cost-performance capacitor core body.

The invention provides a two-parameter sensing system based on optical fiber Fabry-Perot, and an inspection method and a demodulation method thereof. The two-parameter sensing system comprises a sensitive diaphragm, an optical element and at least one base component, a concave groove is formed in one side of the base part; the sensitive diaphragm is connected with the base component to form at least one optical fiber Fabry-Perot cavity which contains the groove and is used for measuring pressure, and an optical fiber Fabry-Perot cavity used for measuring temperature is formed between the upper surface and the lower surface of the sensitive diaphragm; and the optical element is used for emitting light and enabling the light to enter the optical fiber Fabry-Perot cavity for measuring the pressure and the optical fiber Fabry-Perot cavity for measuring the temperature. According to the invention, the measurement of two parameters of pressure difference and temperature can be realized.

The application discloses a pressure curve combined air separation variable pressure intelligent adsorption blowdown method, system and device, relates to the intelligent blowdown technical field.The pressure curve combined air separation variable pressure intelligent adsorption blowdown method, system and device, comprising the following steps: S1, real-time acquisition operation state data, and pretreatment is carried out to operation state data;S2, operation state data is analyzed to pressure disturbance intensity;S3, through real-time analysis and feature extraction to pressure curve;S4, operation state data is predicted to start-stop risk;S5, comprehensive operation state data, pressure disturbance intensity analysis result and start-stop risk prediction result execute blowdown control instruction.The air compressor and variable pressure adsorption system lack linkage control based on pressure change, blowdown is easy to cause pressure fluctuation and frequent start-stop, which leads to energy consumption increase and equipment wear, and the existing control mode lacks feedforward regulation mechanism.

A device for measuring a pressure differential comprises a tube, at least one pressure sensor and a processor. The tube comprises a closed insertion portion for insertion into a body, the insertion portion having an insertion end and an internal bore in communication with ambient pressure via an opening in the tube. The sensor is located in or on the insertion portion and comprises an internally facing region in communication with the bore and an externally facing region in communication with an exterior of the tube. The processor is configured to provide a stimulus, which may be an electrical stimulus, to the pressure sensor so that when the stimulus is provided, the pressure sensor provides a measurable response wherein the processor correlates the response with the pressure differential between the exterior of the tube and the bore. The measurable response may be indicative of a change in pressure differential between the exterior of the tube and the bore. There may be a plurality of pressure sensors, in which case at least two of the sensors may have different resonant frequencies at the same pressure differential. The insertion portion may comprise at least one aperture sealed by at least one pressure sensor. The pressure sensor may comprise an electromechanical or micro-electromechanical material and may comprises a piezoelectric and / or electrocapacitive sensor. The externally facing region of the pressure sensor may comprise a coating, which may be electrically insulative.

The invention discloses a coal mine goaf and stope face air leakage pressure difference testing method, and relates to the field of coal mine safety. Hosepipes are embedded in an air inlet way and an air return way of the stope face in advance, and the pre-embedded hosepipes can continuously go deep into the goaf along with advancing of the stope face; one end of the outer side of the hose embedded in the goaf is connected with an inclined differential pressure gauge; a leather dragging pipe is arranged on the coal mining stope face; the pressure difference between the whole stope face and the goaf is obtained by changing the position of the pitot tube on the stope face; through multiple times of measurement, the pressure difference change rule of the whole coal mining stope face in different time periods and different positions in the goaf can be obtained. The hose is embedded in the goaf, the pitot tube is arranged on the stope face, and the inclined differential pressure gauge is connected, so that the air leakage pressure difference between the coal mine goaf and the stope face can be simply, accurately and quickly measured.

The application provides a high-static-pressure differential pressure gauge convenient to assemble, and belongs to the field of differential pressure gauges, to solve the problem that impurities in the delivered liquid or gas cannot be conveniently filtered and collected, and comprises a gauge body and a connecting pipe, the connecting pipe is installed on the gauge body, a spring is fixedly connected in a rotating disc, the other end of the spring is fixedly connected with a limiting plate, and the limiting plate is fixedly connected with a clamping block. The application is provided with a treatment box; when the connecting pipe is used to deliver liquid or gas, the liquid or gas passes through the treatment box, the residual impurities can be filtered and collected through the internally-installed filter screen, and the adaptability of the gauge body is avoided from being affected by the impurities; when the filter screen needs to be cleaned, the rotating rod can be rotated to drive the first bevel gear to rotate, the first bevel gear can drive the threaded rod to rotate through the second bevel gear, the threaded rod drives the extrusion box to move inward through the moving plate, the extrusion box is separated from the positioning plate, and after being unobstructed, the extrusion box can be taken out for subsequent cleaning and use.

The present invention relates to the technical field of air pressure calibration, and particularly to an air pressure calibration method based on a sensor, which includes setting an independent sensor, calculating the air pressure difference of the independent sensor, and calculating the quantization value of the air pressure difference of the pronunciation sensor according to the air pressure difference of the independent sensor; and obtaining the output volume loudness value by looking up a table according to the quantization value of the air pressure difference of the pronunciation sensor. By adding an independent sensor to an electronic musical instrument and through a calibration algorithm with a small increase in cost, the present invention can avoid the error caused by the ambient air pressure or temperature of the pronunciation sensor, making the pronunciation of the electronic musical instrument more accurate.

The utility model discloses an anti-interference differential pressure transmitter, and belongs to the technical field of differential pressure transmitters. The anti-interference differential pressure transmitter comprises an anti-interference differential pressure transmitter body, a first support and a mounting hole, the mounting hole is formed in the upper portion of the first support, the anti-interference differential pressure transmitter body is in threaded connection with the first support through a bolt penetrating through the mounting hole, a clamping plate is arranged in the middle of the first support, and a first fixing steel wire is arranged on the first support. The bottom end of the first support is rotationally connected with a second support through a rotating shaft and provided with two springs. Through cooperation of the first support, the second support, the spring, the first fixing steel wire and the second fixing steel wire, the differential pressure transmitter is fixed through the extension end of the first support and the two fixing steel wires, errors caused by external factors are reduced, through cooperation of the inclined notch and the spring, adjustment can be conveniently carried out, and the adjustment precision is improved. The differential pressure transmitter adapts to different installation environments and measurement requirements, the anti-interference capability of the differential pressure transmitter is improved, and the flexibility and reliability of the differential pressure transmitter in actual use are enhanced.

The invention provides a heat exchanger on-line switching system in an acid making process, which relates to the technical field of sulfuric acid preparation and comprises two sets of plate heat exchangers, two sets of differential pressure trigger components, a three-way valve, a valve core component, two sets of check valves and two sets of cooling components, the differential pressure trigger assembly comprises a power connection part and two deflection parts which are located on the outlet sides of the heat exchangers and deflect reversely under pressure, two outlets of the three-way valve are connected with the inlet sides of the two heat exchangers respectively, the valve element assembly comprises a horizontally-moving valve rod and a motor provided with a power receiving part, the valve rod is provided with a locking part, an inlet of the check valve is connected with an outlet of the three-way valve, and the opening and closing part is in linkage with the motor. When the pressure difference of the inlet and the outlet of a certain heat exchanger exceeds the limit and the driver is powered on to drive the valve rod to the first preset position, the corresponding check valve is fully opened, and when the driver is driven to the third preset position, the check valve is fully closed, and meanwhile the motor is powered off. Automatic, rapid and reliable online switching of the plate heat exchanger is achieved by integrating mechanisms such as differential pressure triggering, mechanical transmission and electric control.