555results about "Pressure difference measurement between multiple valves" patented technology

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 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.

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 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.

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 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 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 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.

The invention discloses a dual-channel oil-filled pressure core body and a preparation method, and relates to the technical field of pressure core bodies, the dual-channel oil-filled pressure core body comprises a first base assembly, a second base assembly and an integrated circuit board, the first base assembly is provided with a containing cavity and a first groove with opposite openings, and the second base assembly is provided with a second groove; the first groove is communicated with the first oil filling hole to form a first oil filling cavity; the first silicon piezoresistive chip is fixed at the bottom of the first groove, and the first diaphragm seals the opening of the first groove; the second base is provided with a second groove, the second groove is communicated with the second oil filling hole to form a second oil filling cavity, the second silicon piezoresistive chip is fixed at the bottom of the second groove, and the second diaphragm seals an opening of the second groove; the integrated circuit board is in electric signal connection with the first silicon piezoresistive chip and the second silicon piezoresistive chip through the first pin and the second pin. The dual-channel oil-filled pressure core body is simple in structure, high in measurement reliability and capable of meeting the use requirements of different scenes.

A pressure transmitter includes a pressure sensor having a variable capacitance that is indicative of a sensed pressure, a measurement circuit, an output circuit and an oscillator monitor circuit. The measurement circuit includes an oscillator configured to generate an alternating current (AC) drive signal that is applied to the pressure sensor, and a demodulator configured to demodulate a capacitance signal, which is generated by the pressure sensor in response to the AC drive signal, and produce a pressure signal that is indicative of the capacitance and the sensed pressure. The output circuit is configured to control a loop current in a current control loop to be within an operating range to indicate the sensed pressure based on the pressure signal. The oscillator monitor circuit is configured to monitor the AC drive signal and drive the loop current outside the operating range in response to an invalid AC drive signal.

The application provides a pressure sensor and an electronic device, wherein the pressure sensor comprises: a differential pressure sensor, a first substrate and a second substrate which are sequentially stacked; a third substrate in the differential pressure sensor is connected with the first substrate through anode bonding to form an absolute pressure sensor; the first substrate has a first through hole penetrating a thickness direction; the second substrate has a second through hole penetrating the thickness direction, and an electronic element is arranged on a side of the second substrate away from the first substrate; and the electronic element is electrically connected with the differential pressure sensor through the second through hole and the first through hole in sequence.

The application provides a resonant differential pressure sensor capable of static pressure measurement and a preparation method. The differential pressure sensor comprises a cover plate structure from top to bottom, a silicon-on-insulator (SOI) structure and a pressure guide structure. The cover plate structure comprises two small cover plates, i.e., a first small cover plate and a second small cover plate, and a large cover plate. The SOI structure comprises a device layer, a buried oxygen layer and a substrate layer. The beam membrane integrated structure has a stress amplification effect, which improves the small static pressure and differential pressure measurement sensitivity in the prior art, and the problems of large hysteresis, poor repeatability and poor precision caused thereby.

The utility model relates to the technical field of trioxymethylene reactor pressure detection, and discloses a trioxymethylene reactor pressure detection device, which comprises a reactor main body, a pressure detector and a display panel, a pressure controller is arranged on the reactor main body, and a reactor gas phase pipeline is arranged on the reactor main body. According to the trioxymethylene reactor pressure detection device, the pressure detector is arranged on the reactor gas phase pipeline of the reactor main body, the pressure controller is installed on the reactor main body, the pressure detector is arranged on the reactor gas phase pipeline, and the pressure controller is arranged on the reactor gas phase pipeline of the reactor main body. The internal pressure of the reactor gas phase pipeline can be detected through the pressure detector, the internal pressure of the reactor main body can be detected through the pressure controller, and the pressure difference between the two sides of the reactor silk screen layer can be obtained through the pressure controller and displayed on the display panel, so that the working condition of the reactor main body can be conveniently and quickly checked; and the blockage problem can be timely found and processed.

The invention discloses an integrated double-hole friction stress sensor based on pressure gradient detection, and belongs to the field of friction sensors. The sensor adopts flow field surface pressure to detect the magnitude of friction stress, and a friction pressure sensitive module, a pressure detection module and a friction calculation module are integrated in the sensor. When the pressure sensing double-hole structure is subjected to an incoming flow effect, the wall surface has a pressure gradient due to friction resistance, the differential pressure is amplified through the double-hole structure, the differential pressure and the static pressure are detected through the high-precision differential pressure sensitive core body and the high-precision absolute pressure sensitive core body, and then the friction resistance stress is solved. The sensitive core body adopts an integrated packaging scheme, and a double-hole sensitive structure, a pressure cavity, an absolute pressure sensitive core body, a differential pressure sensitive core body and a detection circuit module can be integrally packaged in a single tube shell, so that application under a high static pressure background is realized. The friction resistance stress sensor is excellent in performance, compact in structure, high in robustness and capable of achieving friction resistance stress detection of the hypersonic flight vehicle under the extreme working condition.

The present application relates to the technical field of battery safety, and particularly relates to a battery safety residual pressure evaluation method and device, electronic equipment and a storage medium, wherein the method comprises: obtaining reference data and a state of a battery cell to be evaluated; constructing a first optimization factor by using the difference between the state of the battery cell to be evaluated and the internal impedance of a brand-new battery cell in the reference data; calculating a second optimization factor by using the change acceleration characteristics of a reference temperature curve and the reference gas generation rate at the current time based on the first optimization factor; constructing a final quality source curve based on the first optimization factor and the second optimization factor; and performing safety evaluation on the battery cell to be evaluated by using the final quality source curve to obtain an evaluation result. Through two-step correction of "pre-explosion" and "dynamic instability pulse", the earlier, more intense and intermittent gas generation behavior caused by cell aging is truly mapped into the CFD model, thereby significantly improving the simulation accuracy and avoiding systematic underestimation of the pressure peak value.

Provided is a method for evaluating the air tightness of a case, which can achieve space saving and cost reduction and can shorten the time required for evaluating the air tightness of a plurality of cases. This method for evaluating the airtightness of a housing comprises: a first pressurization / depressurization step in which a first pump connected to a first housing via a first pipe is operated to depressurize or depressurize the inside of the first housing; a first pressure change measurement step for measuring the amount of pressure change in the first housing by means of an evaluation device connected to the first housing via a second pipe after the pressure in the first housing is stabilized; and a first evaluation step for evaluating the airtightness of the first housing by means of an evaluation device on the basis of the amount of change in pressure within the first housing, in which a first valve provided in the first pipe is opened, a second valve provided in the second pipe is closed, a first pressure increasing / decreasing step is performed, the first valve is closed, and a second pressure increasing / decreasing step is performed. A first pressure change measurement step is performed by opening the second valve.

A plunger lift management system may measure a casing pressure data series of an annular space between a casing and a tubing. A plunger lift management system may measure a tubing pressure data series of the tubing. A plunger lift management system may generate a pressure differential data series based on the casing pressure data series and the tubing pressure data series. A plunger lift management system may, based on the pressure differential data series, a weight of a plunger, and a length of the tubing, identifying a weight of liquid lifted by the plunger.

The utility model relates to the technical field of differential pressure transmitters, and discloses an explosion-proof differential pressure transmitter, which comprises a bottom plate, an explosion-proof mechanism is arranged on the surface of the bottom plate, a differential pressure sensor body is arranged at the top of the bottom plate, and a sensor protection mechanism is arranged on the surface of the differential pressure sensor body. Mounting ports are formed in the bottoms of the left end and the right end of the differential pressure sensor body, the differential pressure sensor body is protected through the anti-explosion protective cover during use, wiring is carried out through the wiring port, data observation is carried out through the front observation port, and the anti-explosion protective cover is integrally easy to disassemble and convenient to use. The bottom mounting block can be taken out from the interior of the bayonet socket so as to take down the explosion-proof protective cover by pulling the connecting block to pull out the insertion column from the first insertion opening and the second insertion opening, the differential pressure sensor body can be effectively protected through the arrangement of the mechanism, and meanwhile, the differential pressure sensor is convenient to mount and dismount; and the service cycle and the service life of the differential pressure sensor body can be effectively prolonged.

The utility model discloses a magnetic pole gas differential pressure gauge, including shell and clamping part: the bottom of shell is provided with two connecting mouths, the clamping part sets up at the bottom of shell, the clamping part has the fixed shaft of fixed setting in the bottom of shell, the fixed shaft is rotatory and is provided with rotary clamp a, the fixed shaft is rotatory and is provided with rotary clamp b still, rotary clamp a and rotary clamp b cross each other and present X shape, the side rotatory of rotary clamp a is provided with connecting rod a, the side rotatory of rotary clamp b is provided with connecting rod b, the outside of fixed shaft is rotatory and is provided with slide, and the tail end of slide is rotatory and is connected with connecting rod a. The utility model discloses through being provided with clamping part, can when connecting the hose of external connection with connecting mouth, through pulling slide displacement, thereby lets slide to pull connecting rod a and connecting rod b rotation, makes connecting rod a and connecting rod b can pull rotary clamp a and rotary clamp b rotation simultaneously, and the hose is clamped and fixed at the connecting mouth.

The utility model discloses a novel mechanical seal atmosphere end leakage collecting and detecting system, which belongs to the technical field of mechanical seal and comprises a fixed base, a collecting tank is mounted at the top of the fixed base and communicated with a liquid inlet pipeline, one end of the liquid inlet pipeline is communicated with a liquid outlet pipeline, and the other end of the liquid outlet pipeline is communicated with a liquid outlet pipeline. A liquid inlet pipeline and a liquid outlet pipeline are arranged on the fixed base, a pressure difference transmitter is arranged on the outer side of the fixed base, an overflow pipe is further communicated with the collecting tank, and one end, far away from the collecting tank, of the overflow pipe is communicated with the liquid outlet pipeline, so that the pressure values of the inlet end and the outlet end of the collecting tank are detected through the pressure difference transmitter; when the mechanical seal leaks, liquid in a pipeline enters the collecting tank, the leaked liquid is collected, meanwhile, the pressure difference transmitter detects pressure change and gives out early warning, the pressure difference transmitter is small in detection error and high in precision, the overall installation height of the device is lower than an end cover of the mechanical seal, and disassembly and assembly treatment is facilitated.

The utility model discloses a rotatable high-precision intelligent differential pressure transmitter, which comprises an installation main body, the front side of the installation main body is fixedly connected with a threaded interface, the back side of the installation main body is rotatably connected with an adjusting rod, the interior of the installation main body is rotatably connected with a first shell, and two sides of the first shell are symmetrically and slidably connected with sliding rods. The end, away from the first shell, of the sliding rod is perpendicularly and fixedly connected with the inner side of the mounting body, a second shell is fixedly connected to the upper portion of the first shell, a level meter is arranged on one side of the upper portion of the second shell, and display screens are symmetrically and fixedly connected to the two sides of the second shell. According to the utility model, the first shell is adjusted through the adjusting rod, the angle of the differential pressure transmitter is adjusted through the rotation of the sliding rod in the mounting main body, and the arrangement of the mounting main body is also suitable for detection that two groups of liquid inlet pipelines are not at the same horizontal position. Therefore, the angle range and the application range of horizontal adjustment of the differential pressure transmitter are improved.

The present application relates to a kind of calibration device and calibration method of shock wave overpressure optical measurement system based on shock tube, it is related to the field of shock wave overpressure test, wherein the calibration device includes: standard shock tube, visible measuring unit;Visible measuring unit includes: transparent quartz tube, first piezoelectric sensor, second piezoelectric sensor, third piezoelectric sensor;Transparent quartz tube one end opening, the other end is closed and is arranged;In the direction from the opening end of transparent quartz tube to closed end, first piezoelectric sensor and second piezoelectric sensor have interval and are embedded in the side wall of transparent quartz tube;Third piezoelectric sensor is embedded in the center of the closed end of transparent quartz tube.This scheme can simply, reliably produce theoretical solvable or accurately measured impact wave overpressure of various shock waves propagation process, can accurately and reliably cross-verify and error determination to the impact wave overpressure obtained in optical measurement process, can accurately calibrate the system error of optical observation wave front propagation process.

A sensor die includes a diaphragm having a first membrane and a second membrane positioned within the first membrane. The first membrane is deflectable in proportion with a differential pressure between a first side of the diaphragm and a second side of the diaphragm opposite the first side. The second membrane is deflectable simultaneously with the first membrane and in proportion with an absolute pressure on the first side of the diaphragm.

The application discloses a kind of subsonic aircraft airspeed measurement method and system, it is related to aerospace field, the method comprises: obtaining the dynamic pressure voltage value of aircraft external gas measured by silicon piezoresistive pressure difference sensor and the temperature value of silicon piezoresistive pressure difference sensor measured by temperature sensor under different standard temperature points different standard dynamic pressure pressure value;Characteristic coefficient value of each subset is calculated;According to the characteristic coefficient value of subset and the dynamic pressure voltage value and temperature value in subset, the uncorrected dynamic pressure corresponding to each subset is calculated;Uncorrected dynamic pressure is corrected and calibrated, and the calibrated dynamic pressure corresponding to each subset is obtained;Set range dynamic pressure is calculated, and set range dynamic pressure is obtained by total pressure value minus static pressure value;Target dynamic pressure is calculated according to calibrated dynamic pressure and set range dynamic pressure;According to target dynamic pressure, the airspeed corresponding to each target dynamic pressure is determined, and the high-precision measurement of subsonic aircraft airspeed is realized.

The application discloses a kind of intelligent differential pressure gauge, belongs to differential pressure gauge technical field.The shell with wiring guide groove is included, wiring guide groove is used to install and contain wiring terminal;Wiring guide groove is equipped with a inclined inner wall, and the inclined direction and inclined angle of inclined inner wall are parallel with the installation direction of wiring terminal.Through setting up the wiring guide groove matched with the installation direction of wiring terminal, not only can the containing installation of wiring terminal be conveniently carried out, and wiring of wiring terminal is more convenient and simple, structure is simplified, and assembly efficiency is increased.And wiring terminal is fixed with circuit board, then circuit board is installed and fixed in shell, during installation process, support guide block can guide installation to wiring terminal, prevent wiring terminal from being damaged by mistake, and reduce the time required for alignment installation position, further improve assembly efficiency and reduce the possibility of damage of wiring terminal in assembly process.

The utility model is suitable for the technical field of pressure detection, and provides a packaging structure of a differential pressure sensor, which comprises a sensor body. The protection structure comprises a side shell, a top shell and a detachable shell, and the side shell is provided with a sliding groove; the fixing structure comprises a fixing plate, a connecting plate, a sliding block and a spring, the connecting plate is connected to the fixing plate and the sliding block, the sliding block is arranged in the sliding groove, and the spring is connected to the sliding block and the inner wall of the sliding groove; according to the utility model, a worker pulls the pair of pulling plates, so that the sliding block slides in the sliding groove, the connecting plate and the fixing plate are driven to move towards the direction far away from the sensor body, and at the moment, the spring is stretched; a worker places the disassembly shell between the side shell and the top shell; under the action of the elastic force of the spring, the fixing plate is driven to abut against the dismounting shell; by arranging the fixing plate, the detachable shell can be fixedly connected with the top shell and the side shell, and the situation that the structure is scattered when the detachable shell is subjected to physical impact or vibration of the external environment is avoided.