35results about How to "Detection security" patented technology

The utility model discloses a connector plugging force detection device, and belongs to the technical field of connector testing. A connector plugging force detection device comprises a shell and further comprises a detector which is installed in the shell, a translation part for driving the detector to move horizontally is arranged in the shell, the detection end of the detector is connected with a first clamp, and an adjusting part for adjusting the inclination angle of the first clamp is arranged in the shell; the second clamp is arranged in the shell and corresponds to the first clamp; according to the utility model, the plugging test of the connector is more comprehensive and accurate, and the detection process is safer.

The invention discloses a fan blade lightning arrester detection self-growth soft robot. A storage bin, a double-layer main body, a long steering mechanism, an auxiliary motor and a lead control motor are fixed in a base; the growth steering mechanism is composed of three gear pairs and three main motors, and the three gear pairs have a certain rotating speed difference by controlling the rotating speed of the three main motors, so that the growth direction of the double-layer main body is controlled; the storage bin is a double-layer cylindrical cavity and is used for storing a to-be-grown part of the double-layer main body, the non-grown double-layer main body in the storage bin is conveyed to the front end through the growth steering mechanism so as to grow, and a gap between the double-layer cylindrical cavity is used for allowing a grounding instrument lead to penetrate through for growth. According to the invention, the rapid, high-efficiency and safe detection of the fan blade is realized, the casualties of workers or large measurement errors caused by the precision of the detection equipment and manual operation errors are avoided, and the application possibility of the self-growing soft robot on the fan detection operation and maintenance equipment is provided at the same time.

The pneumatic soft robot comprises a front air bag, a corrugated pipe and a rear air bag which are sequentially and coaxially connected, the front air bag, the corrugated pipe and the rear air bag are all provided with independent ventilation air paths, and the front air bag and the rear air bag can achieve radial volume expansion by means of inflation. Therefore, anchoring in the small intestine is achieved, and the corrugated pipe can stretch out and draw back in the axial direction by means of air inflation. Different from a previous intestinal tract detection pneumatic robot, the core idea of the invention is that the small intestine is dragged by using the pneumatic robot, the robot does not need to crawl in the small intestine, a traditional enteroscope outer sleeve operation mode can be replaced, and medical personnel can conveniently carry out related detection.

The invention relates to a relay fault detection circuit and a fault detection method, the relay fault detection circuit comprises a relay driving circuit, a driving current sampling circuit, an amplifying circuit and a signal shaping circuit, the output end of the relay driving circuit is connected with a coil of a relay, and the other end of the coil of the relay is connected with the driving current sampling circuit; the output end of the driving current sampling circuit is connected with the amplifying circuit, and the output end of the amplifying circuit is connected with the input end of the signal shaping circuit; the output end of the signal shaping circuit is connected with a controller. The relay fault detection circuit is used for collecting the relay driving current signal and the relay pull-in current signal, the output square wave signal is combined with the relay fault detection method to carry out fault judgment on the relay, the relay does not need to be loaded, the safety is high, integration is convenient, and the universality is high.

The invention belongs to the technical field of power grid equipment detection, and particularly provides a movable detection device for a V2G charging and discharging pile, which comprises a main control module, an energy storage battery, a first charging and discharging interface, a second charging and discharging interface, a bidirectional direct current converter, a BMS communication simulation module and a battery monitoring module, a compact movable structure is formed, limitation on actual vehicles and fixed sites is eliminated, detection work is allowed to be flexibly deployed in different sites, and the detection efficiency is remarkably improved. The built-in energy storage battery is used for replacing actual vehicle charging and discharging, so that the battery of the electric vehicle is prevented from being damaged, and the detection cost is reduced.

The invention describes an electromechanical system for checking a machine, comprising: ‑ at least one machine (M, M'...), the machine comprising at least one mechanical unit (M1, M2, M3...), ‑ an automatic module (EA), the automatic module being coupled to the machine via a first link (L1) for checking the operation of the mechanical unit, characterised in that ‑ a second link (L2), the second link coupling the automatic module with at least one identification code (I1, I2, I3...) of the mechanical unit arranged in the machine, the second link having at least one transmission device for identification data of the identification code, the transmission device being of a safety type; ‑ a monitoring controller (PS), the monitoring controller comprising at least one data input (E1) for data transmitted by the automatic module and at least one data input (E2) for identification data transmitted by the second link.

The present invention discloses a fault detection device for substation maintenance, comprising a box, the output end of the motor is fixedly connected to a rotating rod, the inner wall of the box is fixedly connected to a first cross bar, the first cross bar is penetrated by a first short bar rotatably connected thereto from top to bottom, the bottom of the first short bar is fixedly connected to a first bevel gear, a second bevel gear meshing with the first bevel gear is mounted on the rotating rod, the upper end of the first short bar is fixedly connected to a first screw rod, the outer sleeve of the first screw rod is provided with a first threaded barrel threadedly connected thereto, the upper end of the first threaded barrel penetrates the upper side wall of the box and is slidably connected thereto. The present invention can not only inspect and repair multiple insulators through a motor, but also realize the separation of the fault detection device when it rises and the gathering of it when it descends, which is convenient to carry when not in use, reduces the volume occupied, and can realize the movement of the box without manual pushing, making the detection safer. It is suitable for substations.

Provided is an airtight gap detection system, including a hoisting assembly, a detection device and a wireless operation module. The hoisting assembly is arranged at the top of the annular gap, including a track and a running device arranged on the track; the detection device is connected to the running device and is arranged to be able to move up and down in the annular gap, including a plurality of arc-shaped measuring pieces, a transmission device and a detection assembly. The arc-shaped measuring pieces are used to abut against the outer peripheral side of the reactor pressure vessel cylinder and the inner peripheral side of the insulation layer. The transmission device includes a telescopic member and a motor. The telescopic member is connected to the arc-shaped measuring piece. The motor provides a driving force for the radial movement of the telescopic member. The detection assembly includes a displacement sensor for obtaining the radial telescopic size of the telescopic member; the wireless operation module is connected to the detection device and the hoisting assembly in a two-way signal connection, and is used to perform logical judgment, collect signals and issue command signals. Also provided is an airtight gap detection method. The above system and method can realize automated and numerical inspection of the gap.

The utility model discloses a line guiding device of eddy current detection mainly relates to eddy current detection technical field. Including arc plate, the upper alternation and equidistance of arc plate along its axial direction is equipped with first guide frame and second guide frame, first guide pulley that can rotate is installed on first guide frame, and the axial direction of first guide pulley is horizontally arranged, and the parallel second guide pulley of first guide pulley is rotatably installed on second guide frame, and the circumferential sliding connection of second guide frame is relative to arc plate, and the axial direction of second guide pulley is converted between horizontal and vertical based on the sliding of second guide frame, and when the axial direction of second guide pulley is horizontal, two second guide pulleys are respectively with two first guide pulleys isoflat. The utility model has the beneficial effect that is used to the connection line of eddy current detection head and carries out the guidance, makes it before entering the pipe mouth can keep the straight and neat conveying state.

The invention relates to the technical field of transformer monitoring, in particular to a dry-type transformer vibration sensor which comprises a vibration sensing and monitoring module, an MCU master control module, an SRAM storage module, an LORA communication module, a battery monitoring module and a power conversion module. The MCU main control module is electrically connected with the vibration sensing monitoring module, the SRAM storage module, the LORA communication module, the battery monitoring module and the power supply conversion module, and the vibration sensing monitoring module is electrically connected with the SRAM storage module; the vibration sensing and monitoring module is used for measuring the vibration acceleration value of the transformer; the MCU main control module realizes data interaction and control of operation of the whole system; the SRAM storage module is used for storing the acceleration value; the LORA communication module realizes remote transmission of data; the battery monitoring module is used for monitoring the battery voltage; the power supply conversion module realizes conversion of system circuit level and converts voltage into voltage values required by different chips.

The present invention discloses a mixing chamber type human energy metabolism detection device and method. The detection device includes a test gas circuit part, an analysis gas circuit part, a control unit and a computer. The test gas circuit is used for flow detection and collection, physical averaging, dilution and discharge of the exhaled gas of the subject; the analysis gas circuit part is used for oxygen and carbon dioxide concentration detection and sensor calibration of the subject's respiratory gas; the control unit is responsible for the control and signal acquisition of each pump and valve in the device; the computer is responsible for data collection, calculation and analysis, human-computer interaction and result display. The detection method is to first carry out gas concentration calibration, then implement metabolic testing of spontaneously breathing subjects based on gas collection hoods or mechanically ventilated subjects based on ventilators, and finally calculate and display metabolic indicators based on the measured gas component concentrations and flow parameters. The present invention can be applied to two human metabolism detection application scenarios: mechanical ventilation and spontaneous breathing. The test is safe and easy to implement in engineering.

The present invention relates to the field of slope rock detection equipment, and provides a slope rock stability detection equipment, including a detection component, a detection bracket component, a power component, a mounting component, an adjustment arm and an engineering vehicle, wherein the adjustment arm is mounted on the engineering vehicle. The present invention has the following beneficial effects: the present invention adopts a detection component, and a distance measuring sensor respectively measures the distance before and after the rock is subjected to force, and judges whether the rock is firm by judging whether the distance has changed. A camera assists in observing the position of the rock, and conveniently observes whether the rock shakes during the force-bearing process, thereby realizing rock stability detection. The detection component as a whole can rotate at a small angle and have a small displacement in a direction perpendicular to the slope, so that the clamping cone applies a twisting force and an outward pulling force to the rock, thereby facilitating the detection of stability. By adopting a retaining spring, when the power motor is turned off, it is convenient to maintain the position of the detection component, so that the detection result is more accurate.

The present invention provides a system and method for automatic generation of a list of units in a train comprising multiple units. Therein, the system comprises a plurality of sensor means, wherein each of the plurality of sensor means is configured to be mounted to a respective unit of the train and each of the plurality of sensor means is configured to detect a parameter of the respective unit of the train to which it is mounted that is suitable to provide an information about the position of the unit with respect to another unit in the train. Further, the system comprises a control device configured to receive the detected parameters from the plurality of sensor means and to process the detected parameters for generation of the list of units.

The invention provides an MP primer group, a kit and application of the MP primer group in mycoplasma pneumoniae nucleic acid detection, and relates to the technical field of mycoplasma pneumoniae detection. The MP primer group comprises at least one of a first primer group and a second primer group; the first primer group consists of a pair of outer primers F3-1 and B3-1, a pair of inner primers FIP-1 and BIP-1, and a pair of loop primers LF-1 and LB-1; and the second primer group consists of a pair of outer primers F3-2 and B3-2, a pair of inner primers FIP-2 and BIP-2, and a pair of loop primers LF-2 and LB-2. According to the MP primer group provided by the invention, the specificity and the flexibility of detection are improved, the reliability is ensured, and the sensitivity is improved by increasing the amplification speed. The constant temperature characteristic of the LAMP technology reduces cross contamination, so that the detection is rapid and safe, and the LAMP technology is suitable for on-site rapid diagnosis.

The present invention discloses a safety protection device for detecting the air tightness of a hydrogen storage tank, comprising a base and a hydrogen storage tank, one end of the hydrogen storage tank being fixedly connected and connected to an air inlet; when the present invention is inflating, a pressure sensor contacts the surface of the hydrogen storage tank, and after the hydrogen storage tank is continuously inflated and pressurized, an expansion phenomenon occurs, which generates pressure on the pressure sensor; if the pressure is greater than a standard value, the inflation is immediately stopped, and it can be determined that the hydrogen storage tank has a large defect, and then the vacuum tank in the pressure relief component in the inflation mechanism is cooperated to quickly discharge excess gas, so as to avoid the phenomenon of explosion of the large hydrogen storage tank when inflated and pressurized, thereby making the detection process safer; when it is necessary to confirm the leakage point of an unqualified hydrogen storage tank, heated air is filled in through the heating component in the inflation mechanism, and the hydrogen storage tank is thermally imaged by a thermal imaging camera that can move in multiple directions, and hot air will leak out from the leaking place, so the position of the leakage point can be determined, which is convenient for repairing unqualified products.

The utility model relates to the technical field of pressure resistance detection devices, and discloses a pressure resistance detection device for civil materials, which comprises a base, a first motor, a bidirectional screw rod, a movable seat, a second extrusion mechanism, a second pressing plate, a guide rod, a screw rod, a displacement groove, a mounting table, a placement table, a guide piece, a support rod, a first bracket, a second bracket and a first guide rod. According to the device, the two-way screw rod and the first guide rod are arranged on the two sides of the displacement groove, so that the situation that damaged materials are clamped on the low side edges of the two-way screw rod and the displacement groove when the template is extruded due to the fact that the two-way screw rod is located in the middle of the displacement groove is avoided; meanwhile, by means of the structure, damaged materials can be cleaned on the placing table after detection and fall onto the ground through a displacement groove; and by arranging the placing table and arranging the supporting rods on the lower side of the placing table, the placing table and the template on the placing table can be effectively supported, and therefore the situation that the base is deformed or damaged when the second extrusion mechanism and the corresponding functional parts are extruded from top to bottom is prevented.

The utility model provides a vent valve detection device for an F8 type air distribution valve, which comprises an outer sleeve, a detection block and a positioning block, one end of the detection block penetrates through the inner side of one end of the outer sleeve in a sliding manner, the positioning block is separably arranged on the inner side of the other end of the outer sleeve, a compression spring is arranged in the outer sleeve, and one end of the compression spring is connected with the detection block. The other end of the compression spring is connected with the positioning block, the other end of the detection block is separably arranged on the inner side of a valve port of the vent valve in a penetrating mode, the outer side of one end of the outer sleeve is separably connected with the edge of a boss of the vent valve in an abutting mode, and the detection block comprises a sliding rod with one end slidably arranged on the inner side of the outer sleeve in a penetrating mode and a detection column connected with the other end of the sliding rod. The detection column is separably arranged on the inner side of the valve port of the vent valve in a penetrating mode. The vent valve detection device for the F8 type air distribution valve not only can detect the inner diameter of the valve port and the boss of the vent valve, but also can correct the contraction deformation of the boss, thereby improving the detection effect of the vent valve.

The present invention discloses a sternum deformation detection method and device based on three-dimensional point cloud data, wherein the method comprises: obtaining three-dimensional point cloud data of the body surface of a person with sternum deformity to be detected; shearing the three-dimensional point cloud data of the body surface of the person with sternum deformity to be detected to obtain effective three-dimensional point cloud data of the sheared thorax; extracting several cross sections of the effective three-dimensional point cloud data of the sheared thorax at equal height; performing single-section processing on each of the cross sections to obtain the offset angle value corresponding to each of the cross sections; obtaining the offset angle value corresponding to the overlap of multiple cross sections according to the offset angle value corresponding to each of the cross sections; judging whether the sternum to be detected is deformed according to the offset angle value corresponding to the overlap of multiple cross sections and the preset reasonable range of the offset angle. The present invention can safely detect sternum deformation based on three-dimensional point cloud data.

The invention relates to a leak characterization device, a detection system for leaked fuel and a method for detecting a leak. In order to provide an improved assessment of leaks, a leak characterization device (10) is provided comprising a compound (12) having at least two emission-generating markers (14a, 14b). The compound can be applied to the exterior (16) of an enclosure (18) that encapsulates fuel (20) from the surroundings (22). The applied compound is configured to physically and / or chemically react upon exposure to activation energy (24) generated by fuel leakage (26) from the interior (28) of the enclosure. The physical reaction and / or chemical reaction (30) actively generates a detectable emission (32) indicative of at least one measurable parameter (34) of the leak site (36) based on the at least two emission-generating markers.

The utility model relates to the technical field of overhauling, and discloses a gas pressure regulator overhauling platform which comprises a working table, a pressure regulator body is connected to the working table, a partition plate is arranged on the working table, a gas tank is arranged below the partition plate, sliding grooves are symmetrically formed in the partition plate, supporting assemblies are arranged in the sliding grooves in a sliding mode, and the pressure regulator body is arranged on the working table. The supporting assembly comprises a sliding piece arranged in the sliding groove in a sliding mode, a supporting plate is arranged at the top end of the sliding piece, a supporting column is connected to one side of the sliding piece, a sliding plate is arranged in the supporting column in a sliding mode, a connecting piece is connected to the sliding plate, a pressure gauge is connected to the connecting piece, and a connecting disc is arranged at one end of the connecting piece. Flange plates are arranged at the two ends of the pressure regulator body, a plurality of connectors corresponding to flange plate connecting holes are arranged on the connecting disc, the pressure regulator body is convenient to disassemble and assemble, disassembly and assembly consume less time, and therefore the overhaul efficiency is improved, the supporting plates are arranged at the connecting positions to share bearing force, and the overhaul safety is enhanced.

The utility model relates to a kind of large motor dynamic insulation monitoring analysis and early warning device, it is characterized by including: DC mutual inductor, installation in the rotor ground circuit of large motor, for real-time monitoring the leakage current of large motor;Signal processing module is electrically connected with the output end of DC mutual inductor, for receiving the output signal of DC mutual inductor, and the output signal is converted;Controller is electrically connected with signal processing module, the controller is configured as: the output result of signal processing module is compared with set threshold value, to obtain the insulation monitoring result of large motor.The device can carry out dynamic monitoring to the rotor insulation state of large motor, detect safety, efficient, high precision, effectively reduce motor failure, guarantee the normal operation of rolling mill set.

The present invention relates to the technical field of underground operation installation detection equipment, and in particular to an underground gas automatic detection device and a detection method for its application, which specifically comprises: installing a gas detection module on a release frame, releasing the release frame to a predetermined position in a detection well by a lifting mechanism, and collecting detection data of the gas detection module on the original underground gas; when the gas detection module recognizes a low flow rate for the underground gas detection, the gas source can be started, so that a driving mechanism drives a fan to work, and the air flow rate is formed by using the underground original gas, and the size of the gas source can be adjusted to control the flow rate; the sampling mechanism can enter a sampling working state by starting a driving motor, and the real sampling is completed and stored in a sampling bag; the technical solution does not use forced ventilation to interfere with the underground original gas, but indirectly uses a pure mechanical power fan to provide power, and can also effectively complete the sampling through the sampling mechanism, which is safer.

The present invention relates to an in vitro cell test evaluation method suitable for evaluating the ultraviolet protection effect of sunscreen cosmetics, comprising (1) sunscreen cosmetic sample processing; (2) cell culture and cell inoculation; (3) UVA irradiation determination; (4) quantitative detection of ROS by an enzyme marker. This method uses the cell oxidative damage caused by long-wave ultraviolet radiation as a theoretical basis, and uses cells cultured in vitro as materials to establish an in vitro biological evaluation system that is different from the traditional sunscreen cosmetic evaluation method. An in vitro biological detection device innovatively applied in the experiment is scientifically and reasonably designed, has many advantages such as fast and simple operation, low cost, time saving, avoidance of operation pollution, relatively good data repeatability, etc., is safe to use, accurate in detection, and effectively conducts a scientific, reasonable and correct evaluation of the efficacy of sunscreen cosmetics, providing technical guarantee for the human safety and efficacy evaluation of sunscreen cosmetics.

This invention discloses a load-bearing capacity testing device for highway bridges used in transportation construction, relating to the field of bridge inspection. It includes a mobile chassis, a self-propelled wheeled platform that travels along the bridge deck. The chassis platform is equipped with a static loading mechanism and a deployment execution mechanism. The static loading mechanism is an independent static load application component based on support pillars. The detection module consists of several wireless sensors with built-in power supplies, data storage units, and wireless communication units, capable of independent operation. The outer shell of the detection module is provided with an adhesive backing layer or mechanical clips for fixing to the beam surface. The deployment execution mechanism is used to cross from the bridge deck to the underside of the bridge and install the detection module onto the underside or web of the beam. This load-bearing capacity testing device for highway bridges used in transportation construction achieves coordinated operation of bridge deck loading and under-bridge deployment through an integrated mobile platform, solving the problems of low efficiency caused by traditional inspection methods that rely on manual high-altitude operations.

The invention belongs to the field of construction site inspection devices, and particularly relates to a construction site inspection robot which comprises a first rectangular plate, a humidity monitoring device is arranged at the upper end of the first rectangular plate, the humidity monitoring device comprises a conical barrel arranged on one side of the upper end of the first rectangular plate, and a humidity detector is installed on one side in the conical barrel. A first telescopic assembly used for driving the conical barrel to move is arranged on one side of the upper end of the first rectangular plate and comprises a U-shaped hose fixedly connected to one side of the conical barrel, a second rectangular strip is fixedly connected to the end, close to the conical barrel, of the U-shaped hose, and a first rectangular strip is fixedly connected to the other end of the U-shaped hose; the first rectangular strip can slide in the second rectangular strip, the conical barrel is driven to be tightly attached to one side of a heat dissipation opening of the distribution box, then air in the distribution box is pumped out, the humidity of the air in the distribution box is detected through the humidity detector, if the humidity of the air in the distribution box is high, power-off maintenance is conducted immediately, and the construction safety of workers is guaranteed.

A method for monitoring the operation of a frequency converter (1), which is designed to control an electric motor (2), wherein the method comprises the steps of: - generating phase voltages (u1, u2, u3) for corresponding phase lines (2.1, 2.2, 2.3) of the electric motor (2), - determining a voltage rotating field, - measuring the occurring phase currents (i1, i2, i3), - determining a current rotating field based on the measured phase currents (i1, i2, i3), - calculating a phase difference between the voltage rotating field and the current rotating field and / or calculating a frequency difference between a frequency of the voltage rotating field and a frequency of the current rotating field, and - determining an error state when the phase difference exceeds a phase difference threshold value and / or when the frequency difference exceeds a frequency difference threshold value.

The present invention relates to the field of detection technology, and proposes a barbell bar hardness detection device, including a detection bracket, a squeezing mechanism, a limit adjustment mechanism, a driving mechanism, a detection mechanism, a main console, a time relay switch and a protective cover, wherein the upper end of the inner rear side of the detection bracket is rotatably connected with the squeezing mechanism, the middle of the upper ends of the inner two sides of the detection bracket are fixedly installed with the limit adjustment mechanism, the inner periphery of the limit adjustment mechanism is fixedly installed at the two ends of the barbell bar body, the right end of the inner lower part of the detection bracket is fixedly installed with the driving mechanism, the left side of the detection bracket is provided with the main console, the middle of the inner left upper end of the detection bracket is fixedly installed with the time relay switch, and the middle of the front end of the detection bracket is fixedly installed with the detection mechanism. Through the detection of the barbell bar body in multiple directions and with different deformation degrees, the detection credibility is higher, the detection efficiency is improved, the detection result is more accurate, and at the same time, the safety factor is higher during the detection process.

The application discloses a substation primary equipment partial discharge source joint positioning method based on ultrasonic and infrared fusion, which comprises the following steps: 1, obtaining infrared images, ultrasonic images and phase images of the primary equipment; 2, pre-processing the infrared images and ultrasonic signal images of the primary equipment obtained in step 1; 3, fusing the infrared images and ultrasonic signal images based on a maximum selection-based fusion rule; and 4, realizing joint positioning of the partial discharge source based on the fused infrared ultrasonic images. The joint positioning method is more time-saving and labor-saving, the method can be used for fusing images and signal images, can reduce the influence of adverse factors, improve the recognition degree of the target source, and further ensure accurate positioning of the partial discharge source, has high detection efficiency and strong defect depth detection capability. The method avoids the interference of subjective judgment factors, is more accurate than the traditional detection method, and is safer in the detection process.

The application discloses a limited space toxic gas gradient detection system and method based on a UAV, and the system comprises the following steps: a multi-sensor integrated module is installed at the bottom of a UAV platform, and the module comprises a hydrogen sulfide electrochemical sensor, an oxygen optical sensor, a positioning module and a laser radar; a controller is connected with the UAV platform, the multi-sensor integrated module and a communication module; and a data processing terminal is connected with the controller through wireless communication. The method comprises the following steps: a two-dimensional vertical plane model of a vertical detection plane is generated based on LiDAR data, a plurality of detection points arranged in a matrix form are divided from the two-dimensional vertical plane model, spatial coordinate information, hydrogen sulfide gas concentration data and oxygen concentration data of each detection point are collected, and hydrogen sulfide and oxygen concentration data of all horizontal layers in the vertical direction are calculated based on the detection data by using a Kriging interpolation algorithm. The system and method can automatically realize high-precision gradient detection of toxic gases in the vertical direction in a limited space.

The utility model provides an ultrasonic thickness measuring device for a low-pressure circulating barrel. The ultrasonic thickness measuring device comprises an arc-shaped frame which is separably attached to the outer side of the low-pressure circulating barrel, an ultrasonic thickness measuring mechanism which is arranged on the arc-shaped frame in a sliding mode, and a handle which is connected with the arc-shaped frame. The ultrasonic thickness measuring mechanism comprises a driving assembly arranged on the arc-shaped frame in a sliding mode, a clamping assembly connected with the driving assembly, and an ultrasonic thickness gauge detachably connected with the clamping assembly. According to the ultrasonic thickness measuring device for the low-pressure circulating barrel, the arc-shaped frame is attracted and fixed to the outer side of the low-pressure circulating barrel through the magnet, the clamping assembly is driven by the driving assembly to move to the measuring position along the arc-shaped frame, and the fixing barrel is driven by the electric push rod to move; therefore, the probe of the ultrasonic thickness gauge is attached to the outer wall of the low-pressure circulating barrel to detect the thickness, multi-point thickness detection of the low-pressure circulating barrel is safer, more reliable, more convenient and faster, and the detection efficiency of the low-pressure circulating barrel is improved.