46results about How to "Little external interference" patented technology

The utility model relates to the technical field of circuits capable of automatically changing measuring ranges, in particular to a multi-measuring-range automatic switching circuit, which comprises measuring range control circuits with a plurality of measuring ranges, and is characterized in that each measuring range control circuit is used for carrying out current measurement in a corresponding measuring range so as to be displayed on an ampere meter; the current detection circuit is connected with each range control circuit and is used for detecting the current of each range control circuit; and the MCU main controller is respectively connected with the current detection circuit and each range control circuit and is used for comparing the current of each range control circuit with the corresponding set current and controlling whether each range control circuit is conducted or not according to the result. The situation that ampere meters with different measuring ranges are manually replaced can be reduced.

The invention relates to the field of machine tools, in particular to a five-axis linkage high-speed high-precision machining center which comprises a machine base, a three-axis moving module and a main shaft device are arranged at the top of the machine base, and the three-axis moving module is used for driving the main shaft device to move in the three different directions of the X axis, the Y axis and the Z axis. The main shaft device comprises at least one main shaft capable of rotating and / or feeding and is used for carrying out machining operations such as cutting, drilling and milling on a workpiece; a cradle type rotary table device and an automatic tool changing device are arranged at the bottom of the machine base, the cradle type rotary table device is used for achieving adjustment of two rotational freedom degrees of a workpiece in the machining process, and the automatic tool changing device is used for automatically changing tools on the main shaft device. According to the multi-axis linkage drilling and milling device, multi-axis linkage, high-speed and high-precision cutting, drilling, milling and other machining operations can be carried out on workpieces.

The invention provides a terahertz suspension core optical fiber, which belongs to the technical field of optical fibers and comprises an outer sleeve, a plurality of I-type dielectric tubes and a plurality of II-type dielectric tubes with the same number as the I-type dielectric tubes, wherein the plurality of I-type medium pipes are arranged in the outer sleeve, and each I-type medium pipe is tangent to the outer sleeve; the multiple II-type medium pipes are arranged in the outer sleeve, and one II-type medium pipe is arranged on the outer wall of each I-type medium pipe in a tangent mode; based on a modified total internal reflection principle, the dependence of a traditional suspension core optical fiber on a thin arm in structure is avoided; the simple optical fiber structure with all structural units being circular boundaries has more prominent advantages in optical fiber manufacturing. The hollow porous structure can ensure that most of energy in the mode is distributed in the air, so that the absorption loss is effectively reduced.

The invention discloses a power battery detection and alarm system, and the system comprises a power conversion module which is used for the conversion of an external input power supply; the photoelectric isolation module is used for photoelectric isolation of communication signals; the main control module is used for analyzing the operation input signal and outputting an operation result signal; the communication module is used for sending an alarm signal to external equipment; the detection module is used for detecting the gas concentration and temperature of the ternary lithium power battery; the alarm module is used for sending out a photoelectric alarm; and the alarm selection module comprises an operation panel, an alarm output mode selection circuit, an alarm trigger concentration selection circuit, an alarm trigger temperature selection circuit and an alarm detection duration selection circuit, and is used for setting an alarm mode and an alarm value. Alarm values and alarm modes can be set according to different environments, external interference can be effectively reduced through different settings, and the false alarm rate is reduced. And a fault self-checking function is set, so that a user can find device faults as soon as possible.

The invention discloses a multi-data fusion sediment measuring device which comprises a cylindrical underwater measuring device which is through in the middle and based on the light scattering principle and an automatic photoelectric system matched with the cylindrical underwater measuring device. The device is used for collecting backscatter, transmission and 45-degree, 90-degree and 135-degree scattered light intensities generated by the sand-containing water flow flowing through the middle through area of the light source. According to the system, the noise of the system is reduced through hardware model selection, hardware design and a software algorithm, the external interference is reduced, and accurate acquisition, measurement and data storage of the light intensity are realized. Besides, the multi-data fusion sediment measurement device can provide multi-feature data for forming a targeted machine learning model of a target drainage basin, realizes monitoring of the content of common sediment in the target drainage basin in different time and space in the drainage basin, has wide applicability and is suitable for popularization and application. And help is provided for the fields of water resource management, ecological system protection and the like of the device putting and using drainage basin.

The utility model relates to the technical field of shielding cases, and discloses an electric connector shielding case, which comprises a connector body, a first shielding case and a second shielding case are respectively and movably sleeved on the surface of the connector body, and a dismounting mechanism is arranged between the first shielding case and the second shielding case. According to the electric connector shielding case, when the shielding case is damaged and needs to be replaced, an operator can quickly separate the first shielding case from the second shielding case only by pushing the push rod without complicated tools and tedious operation steps, so that the replacement time is greatly shortened, and the practicability of the device is improved; according to the electric connector shielding case, the requirement for convenience of maintenance and replacement of the shielding case in an actual use scene can be better met, meanwhile, through the combination of the first shielding case and the second shielding case, the internal electric connector can be effectively protected, external interference is reduced, stable operation of the electric connector is maintained, and the basic function advantages of the electric connector shielding case are continued.

The utility model relates to the technical field of automobile suspension systems, in particular to an automobile suspension bearing friction torque detection device, which comprises a machine body, a servo motor, a speed reducer, a rotating shaft, a screw rod, a handle, a loading spring, an axial pressure sensor, a placing device and a measuring device. Radial and axial loads are borne through the suspension bearing, external interference is greatly reduced, and particularly, the influence of the friction torque of the measuring device on the friction torque detection of the suspension bearing is eliminated, so that the final detection value is real and reliable, the detection condition is close to the actual working condition, the detection value is real and reliable, and the practicability is high; the friction performance of the suspension bearing can be well evaluated, and an effective suspension bearing quality control means is provided for suspension bearing manufacturers; the design of simultaneous detection of the two sets of suspension bearings can eliminate the influence of the rotating shaft on the friction torque detection, and guarantees the detection precision of the friction torque.

The invention discloses a cooling device for efficient heat dissipation of a gearbox, and relates to the technical field of transmission devices. The radiator fan is rotatably mounted in the radiator main frame and is rigidly connected with the fan motor; one side of the cooling fan is provided with a cooling pipeline which is connected with a temperature control valve, and the other side of the cooling fan is provided with a cooling plate; an air inlet of the radiator is provided with an anti-flocculation net, and an air outlet of the radiator is provided with an air duct which is communicated with the cabin; the heat dissipation plates are of an integral aluminum magnesium alloy structure. The cooling pipeline is a double-layer high-elasticity fiber and steel wire winding rubber pipe; the temperature control valve is of a spring pressure type; the anti-flocculation net comprises an aluminum alloy frame and a diamond net; the surface of the radiator is coated with a graphene-containing coating; the ventilating duct and the exhaust hood are made of military silica gel coating glass fiber cloth; the cooling fan and the like form a penetrating type heat exchange core body; a reinforcing lifting lug is arranged on the main frame; the cooling capacity is guaranteed, the operation stability of the gearbox is improved, and the service life is prolonged.

The utility model discloses a kind of textile steel ring raw material automatic punch forming machine, including base, the top of the base is provided with roof rack, the base is connected with roof rack by multiple supports, the base and roof rack are commonly provided with punch forming equipment main body, the upper end of the base is provided with conveyor belt, the lower end of the roof rack is fixedly connected with hydraulic rod, the elongation end of the hydraulic rod is fixedly connected with device cylinder, the inner wall of the device cylinder is fixedly connected with detection device, the upper end of the device cylinder is provided with adjusting device, the side wall of the support at corresponding position is fixedly connected with fixed frame, the side wall of the fixed frame is fixedly connected with control panel. The utility model has the advantages that it is convenient for operators to operate and detect the damage of steel ring, and avoids damaging the equipment.

The application belongs to the field of CT internal temperature control, in particular to a CT internal temperature control and steam water replenishment test device, which comprises a base, a pedestal is installed on the top of the base, a soil sample mold main body is installed on the top of the pedestal, a PVC heat preservation film is detachably connected to the outside of the soil sample mold main body, a temperature control box is arranged on one side of the top of the base, and a bottom plate is installed on the bottom of the pedestal; the water source is filtered through the filter frame, the harmful substances in the water are adsorbed through the activated carbon in the installation box, the impurities in the water are prevented from affecting the quality of the subsequent supplemented steam, the filter frame can be repeatedly cleaned through the brush plate, the impurities above the filter frame are knocked and shaken off through the high-frequency knocking of the knocking rod, then the impurities fall into the storage box through the discharge port to complete the collection, the problem that the filtering effect is easily affected due to too much accumulated impurities after the filter frame is used for a long time is effectively avoided, manual cleaning is not needed frequently, and the labor burden of the workers is effectively reduced.

The utility model relates to the technical field of medical equipment, and particularly discloses an oral cavity CT medical vehicle which comprises a vehicle head and a compartment. The vehicle head is mounted in front of the compartment; a first compartment and a second compartment are arranged in the compartment, the first compartment and the second compartment are arranged side by side, and the first compartment is communicated with the second compartment through a movable door; the first compartment is close to the rear part of the carriage, and the second compartment is close to the front part of the carriage; an outlet is formed in the rear of the compartment; a center console is arranged in the first compartment, a vertical oral cavity CT instrument is arranged in the second compartment, and the vertical oral cavity CT instrument is controlled by the center console. According to the medical compartment, examination equipment and an operation area are integrated into a whole, so that the turnover time of a patient among different examination places is shortened, oral CT examination can be quickly completed, the patient can obtain a diagnosis result more quickly, follow-up treatment can be carried out in time, and illness state delay is avoided.

The invention relates to the technical field of PCBA (Printed Circuit Board Assembly) burning and testing, and discloses a method for improving the burning and testing efficiency of PCBA, which comprises the following steps of: firstly burning a program to the PCBA by a burner, and then sending an ICT (Information and Communication Technology) test starting signal to the PCBA; after receiving the ICT test starting signal, the PCBA starts to execute an ICT test program to carry out an ICT test, and sends an ICT test result to the burner; the burner judges whether the ICT test of the PCBA is passed or failed according to the test result; according to the method, in actual use, after the program is burnt through the burner, the burner sends the test starting signal to the PCBA to start the ICT test of the PCBA, so that an additional ICT test signal sending device is omitted, and the ICT test cost of the PCBA is reduced; secondly, the PCBA does not need to be connected with the ICT test signal transmitting equipment, so that a manual connection step is omitted, and the operation is simple and convenient; and finally, an ICT test signal is sent through the burning interface of the online burner, so that the external interference is effectively reduced, and the signal transmission stability is improved.

The utility model provides a track vibration isolation mat simulation detection device, including a plurality of elastic support components, lower basic simulation board, track board simulation board, vibration loading mechanism and vibration acceleration sensor, the vibration isolation mat sample of waiting for detecting is arranged between lower basic simulation board and track board simulation board, therefore can simulate actual vibration isolation mat floating plate track structure well, and the vibration isolation mat performance that detects obtains is very close to its performance in actual track, has very good reference value. Besides, through setting a plurality of elastic support components below lower basic simulation board, and setting vibration acceleration sensor on it, can take the vibration energy that vibration loading mechanism loads as input energy, take the elastic potential energy of elastic support component that vibration acceleration sensor detects as output energy, and evaluates the performance of vibration isolation mat based on input energy and output energy, compares with the traditional track lower basic vibration level difference method more intuitive and simple.

The invention provides a capacitive wireless charging portable gas detector which comprises a charging base, the charging base is matched with the portable gas detector, a power circuit, a control circuit and a first coupling electrode plate are arranged in the charging base, and the power circuit and the control circuit are both connected with the first coupling electrode plate. The control circuit generates a high-frequency PWM signal as a driving signal of the first coupling electrode plate; a second coupling electrode plate, a charging circuit and a battery are arranged in the portable gas detector, the second coupling electrode plate is matched with the first coupling electrode plate, the second coupling electrode plate and the first coupling electrode plate which are close to each other form a two-pole structure of a capacitor, the second coupling electrode plate induces to generate charges, and the charging circuit is connected with the battery. And the second coupling electrode plate is connected with the battery through the charging circuit. The coupling electrode plate is used for replacing an inductor, and no large inductor exists in the inductor; the coupling electrode plates in the portable gas detector are separated from each other and cannot form capacitance, so that the difficulty of intrinsic safety explosion-proof design of the whole detector is reduced, the equipment safety is improved, and the service life of a portable instrument is prolonged.

The utility model belongs to the technical field of motor vehicle tail gas detection, and particularly relates to a motor vehicle tail gas lightproof smoke intensity detection device which comprises a shell, a detection dark cavity is formed in the shell, a lightproof smoke intensity detection unit is fixedly connected to the shell, and the front end of the shell is fixedly connected with an air inlet set communicated with the detection dark cavity. The rear end of the shell is fixedly connected with a shading exhaust set communicated with the detection dark cavity, the air inlet set comprises a flexible cover fixedly connected to the front end of the shell, the flexible cover is made of a deformable material, a connecting piece is assembled at the front end of the flexible cover and is an elastic ring, and the shading exhaust set comprises a smoke exhaust barrel fixedly connected to the rear end of the shell. And a rectangular cavity communicated with the detection dark cavity is formed in the smoke discharging cylinder. According to the utility model, the tail gas discharged by the tail gas discharge pipe of the motor vehicle can be directly conveyed to the detection dark cavity in the shell for detection, so that the external interference in the process of carrying out light-proof smoke intensity detection on the tail gas is reduced, and the detection accuracy is improved.

The application belongs to the technical field of tunnel engineering detection, and discloses a tunnel displacement simulation device and a detection calibration method, which comprises multiple groups of tunnel simulation units, the multiple groups of tunnel simulation units are sequentially spliced, each group of tunnel simulation units comprises two groups of arches, a support steel frame and a plurality of groups of telescopic pipe piece assemblies; the two groups of arches are oppositely arranged, the support steel frame is in a semicircular arc support structure and is arranged between the two groups of arches; the plurality of groups of telescopic pipe piece assemblies are arranged on the support steel frame and are sequentially arranged along the arc surfaces of the two groups of arches, wherein the adjacent telescopic pipe piece assemblies are connected, and the plurality of groups of telescopic pipe piece assemblies can simultaneously expand and contract along the radial direction of the two groups of arches and are used for simulating the profile range between the maximum profile and the minimum profile of the tunnel. The application can realize the simulation of the dynamic continuous deformation of the tunnel, does not need manual comparison of the scale, reduces the error caused by manual operation and lays a structural foundation for high-precision calibration.

The invention discloses a pretreatment method of a nitrate nitrogen stable isotope sample, and belongs to the technical field of environmental science, agriculture and chemical analysis. The pretreatment method of the nitrate nitrogen stable isotope sample comprises the following steps: adding an excessive stannous chloride hydrochloric acid aqueous solution into a nitrate-containing water sample to reduce nitrate in the water sample into nitrite, and continuously adding excessive metal zinc to reduce the nitrite into N2O to obtain a nitrate nitrogen stable isotope sample to be detected. The pretreatment method of the nitrate nitrogen stable isotope sample provided by the invention is efficient, simple, convenient and accurate. And determining the nitrogen isotope ratio of the treated N2O by using a stable isotope ratio mass spectrometer which only responds to the N2O, and deducing the composition of the nitrogen isotope in the nitrate sample.

This utility model discloses a double-layer piezoelectric sound acquisition device for pipeline leak detection, comprising an outer cylinder, an inner cylinder, an adjustment mechanism, a double piezoelectric structure, and a acquisition body. The acquisition body is disposed inside the outer cylinder. The bottom side of the outer cylinder is open, and a receiving cavity is formed inside the outer cylinder. The inner cylinder and the adjustment mechanism are both disposed within the receiving cavity. The adjustment mechanism is located on the side of the inner cylinder away from the open, and the adjustment mechanism is driven and connected to the inner cylinder. A detection cavity is formed inside the inner cylinder, and a acquisition port communicating with the detection cavity is opened on the side of the inner cylinder away from the adjustment mechanism. The double piezoelectric structure is disposed on the side of the receiving cavity away from the acquisition port, and the double piezoelectric structure is electrically connected to the acquisition body. The adjustment mechanism is used to drive the inner cylinder to move towards the open, so that the acquisition port of the inner cylinder abuts against the ground near the open. In the technical solution proposed by this utility model, the adjustment mechanism drives the inner cylinder to abut against the ground through the open, ensuring that the acquisition port of the inner cylinder is always in contact with the ground when acquiring audio, thus guaranteeing accurate acquisition of sound wave data.

The invention discloses an audio isolation device of a surveillance camera, an audio isolation circuit of the surveillance camera and a use method of the audio isolation device, and the audio isolation device comprises an audio input part, the audio isolation circuit and an audio output part, a primary coil and a secondary coil of each isolation transformer are respectively connected with an input interface of the audio input part and an output interface of the audio output part through signal lines. The isolation transformer of the audio isolation circuit can isolate an audio input signal from an audio output signal, thereby avoiding signal interference and loss.

The invention relates to a device and a method for measuring a friction coefficient of powder for additive manufacturing, in particular to measurement of a powder-powder substrate friction coefficient and measurement of a powder-substrate friction coefficient. The device comprises a shell, a funnel, an electric control valve, a laser emitting device, a laser receiving device, a powder scraping device, a powder laying device, a mechanical claw, a telescopic arm, a tension meter, an electric control translation table, a measuring platform and a powder collecting barrel. According to the invention, the components such as the electric control valve, the laser emitting and receiving device and the powder scraping device are adopted to measure the repose angle of the powder to be measured, so that automatic measurement of the powder-powder friction coefficient is realized; by controlling the mechanical claw to place the substrate, the powder laying device to lay the powder bed and utilizing the tension meter to measure the friction force, automatic measurement of the powder-substrate friction coefficient is realized, so that manual intervention is reduced, the measurement precision is improved, the two measuring devices are integrated into a whole through the hydraulic device, and the device is simplified.

The utility model discloses a mosquito incense smoke generating device for inhalation toxicity test belongs to test equipment technical field, including upper cylinder, with the upper cylinder detachable splicing lower cylinder and the vertical stack placement in the upper cylinder with lower cylinder's several mosquito incense tray, the lower cylinder is equipped with air supply mechanism, the air supply mechanism includes: fan, the fan is fixedly connected with the power source output end of lower cylinder bottom installation, and the power source is used for driving the fan rotation air -blowing, this mosquito incense smoke generating device for inhalation toxicity test makes air be rotated dispersion in the ascending process through the linkage of fan and rotary conveying structure, and each layer mosquito incense tray obtains equal flow, and the combustion speed tends to be consistent, and the smoke concentration fluctuation reduces, and the upper cylinder is locked with the lower cylinder through the snap -on, and the transparent observation window provides real -time field of vision, and the plugging structure can stepless regulation air intake in the midway of test, and even cut off the air completely and make mosquito incense extinguish.

This invention provides a six-degree-of-freedom simulator for low-gravity landing cushioning, comprising a landing leg assembly, a frame, an IMU, an air-bearing ball bearing, and a connecting column forming an attitude control platform and a translational platform. Four landing leg assemblies are evenly arranged on the frame. An air-bearing ball bearing is located in the middle of the frame, with an IMU mounted above it. The lower part of the air-bearing ball bearing is connected to the translational platform via the connecting column. A control component is also provided on the frame, and the landing leg assemblies and IMU are connected to the control component. The planar air cushion of the translational platform is used for support on a simulated tilting platform, and the landing leg assemblies act on the simulated landing surface. This invention can record attitude changes and the force and torque values ​​of the landing legs during landing, and compare the experimental data with simulation results from a full-physics simulation test.

The invention provides an implantable catheter device for intracranial pressure monitoring, which comprises an implantable catheter, an extracranial functional shell, a pressure sensor, a flexible diaphragm and a detection circuit board, and is characterized in that the extracranial functional shell is connected with the upper end of the implantable catheter; the implantation catheter comprises a rigid supporting tube section connected into a skull hole in a penetrating mode and a tail end flexible catheter extending into the intracranial space through the skull hole, a detection circuit board is arranged in the extracranial functional shell, and a horizontally-arranged flexible diaphragm is fixedly arranged in an inner cavity of the rigid supporting tube section; the closed space is located on the upper side of the flexible diaphragm and can be used for installing a pressure sensor, the pressure conduction area is located on the lower side of the flexible diaphragm and is responsible for signal transmission, and the pressure sensor is located in the closed space above the flexible diaphragm and electrically connected with the detection circuit board. The tissue damage risk after implantation can be reduced, the comfort level of a patient is improved, the single collection direction is avoided, and the coverage range of a collection area can be enlarged.

The application discloses a landfill methane long-term monitoring static box device and method, and relates to the technical field of landfill methane emission monitoring. The device comprises a bottom-opened box, a gas conveying unit, a gas mixing unit, a one-way low-pressure pressure relief valve, a detection module, a power supply unit and a control system. The method comprises a deployment, initialization and monitoring stage, and can calculate the methane emission rate by automatically injecting air, mixing gas, collecting data and transmitting. The device and method realize automatic and long-term continuous monitoring, synchronously acquire multi-dimensional parameters, improve monitoring efficiency and data continuity, solve the problems of traditional static boxes, such as dependence on manual operation and single data dimension, and provide data support for emission reduction strategies.

The utility model discloses a surface moisture -resistant treatment device of cold chain transportation packaging carton relates to surface moisture -resistant treatment device technical field, the surface moisture -resistant treatment device of cold chain transportation packaging carton includes the support air -dry mechanism, and the paper box conveying device is installed on the support air -dry mechanism upper end, the moisture -resistant treatment device is installed on the paper box conveying device, the utility model discloses, when using, the upper spray head pipeline, side spray head pipeline, lower spray head pipeline cooperate rectangular array atomizing spray head, and the surface of paper box is covered from multidimensional, and the moisture -resistant liquid is evenly sprayed, and the problem that uneven processing of manual or simple equipment is solved, and the consistency of paper box moisture -resistant performance is guaranteed.

The utility model discloses a roller shutter door structure of a laser cutting machine and the laser cutting machine, and belongs to the field of laser processing equipment. According to the technical scheme, the roller shutter door structure of the laser cutting machine comprises a frame, a front door assembly and a top plate assembly are installed on the frame, an L-shaped guide rail is further arranged on the frame, the front door assembly comprises a plurality of door plate units hinged to one another, and a lower guide assembly is arranged on the side edge of the lowermost door plate unit. The front side edge of the top plate assembly is hinged to the door plate unit located at the upper end, an upper guide assembly is arranged at the hinged position of the top plate assembly and the door plate unit, and horizontal guide assemblies are arranged on the two side edges of the top plate assembly. And a lifting driving structure is arranged between the lowermost door plate unit and the frame. A part of the top panel is integrated into the roller shutter door structure, so that the top panel can slide along the guide rails, a larger free space is formed in the large surrounding part for operation of the laser cutting machine, a movable part of the roller shutter door is farther away from a machining area, and external interference such as slag and smoke can be reduced.

The utility model discloses a single-chip microcomputer watchdog circuit with a controllable period, and relates to the field of electronic circuits. Comprising a dog feeding circuit and a reset circuit, the dog feeding circuit comprises an input circuit and a counting circuit, the input circuit suppresses interference through RC filtering and diode clamping, the counting circuit adopts a 74LS161DC counting chip and is matched with an active crystal oscillator U2 and a control button with preset data to realize controllable period, and a counting space can be expanded in a cascading manner. The reset circuit is composed of a triode Q1, an SP708SEN voltage detection chip U3 and a manual reset circuit, the auxiliary power supply is connected to a voltage fault input pin of the U3, meanwhile, reset signals are transmitted to the input circuit at the same time, and the reset circuit has the functions of signal processing, voltage monitoring and synchronous reset. The circuit solves the problems that a traditional watchdog circuit is fixed in period, insufficient in interference resistance and the like, and has the advantages of being flexible and controllable in period, high in anti-interference capacity, capable of achieving multiple protection and convenient to maintain due to the modular design.

The utility model discloses a kind of cutting machine auxiliary positioning structure, belong to auxiliary positioning structure field, including base and the positioning mechanism assembled above base, and the cutting mechanism assembled below base.The utility model is set through positioning mechanism, the sliding design of movable plate in rectangular groove can adhere to one end of workpiece, cooperate spring drive movable rod, can self-adapting resist different shape workpiece, ensure that workpiece is resisted in movable rod in cutting process one side, the combination of spring and buffer rod effectively drives movable rod reset after cutting, it is convenient for next use, first hydraulic rod drives horizontal plate to press down limit column, can quickly lock movable rod position, realize automatic clamping, to make the one side of workpiece be resisted on movable rod, at this time, only need staff to fix the other side of workpiece, increase the stability when workpiece cutting, reduce the instability of two hands fixed workpiece on base, while saving manual adjustment time.

The invention provides a house building structure with a leveling and urgent dual-purpose platform, and relates to the technical field of houses. The structure comprises an air health-care entertainment building and a plurality of multi-storey residential buildings which are arranged in an enclosed manner, a plurality of central garden buildings are arranged in the enclosed center, a comprehensive platform center is arranged at the center position, a first elevator and a walking stair are arranged in the comprehensive platform center to connect the ground with the central garden buildings, and a comprehensive reservoir is further arranged. The upper end of the central garden building is provided with hollow beams for wind dispelling and diversion. And the plurality of multi-storey residential buildings are connected with an air corridor. According to the structure, a central garden is provided, neighborhood communication is promoted, the social entertainment requirements of residents are met, meanwhile, the functions of evacuation and escape, fire safety, typhoon and earthquake disaster resistance, epidemic situation prevention and control and the like are achieved, safety guarantee is provided for the residents, the peacetime and urgency dual-purpose platform effect is well achieved, and the life quality and the sense of safety of the residents are improved.

The utility model relates to the technical field of nondestructive testing, and discloses a bolt axial stress ultrasonic measuring device which comprises a constant-temperature box and an auxiliary mechanism, the outer wall of the top of the constant-temperature box is fixedly connected with a motor, the output end of the motor penetrates through the constant-temperature box and is fixedly connected with a rotating shaft, the output end of the motor is provided with a measuring mechanism, and the measuring mechanism is connected with the auxiliary mechanism. The outer wall of the side, close to the motor, of the constant-temperature box is fixedly connected with a display screen, the outer wall of the constant-temperature box is fixedly connected with a water inlet pipe, before axial stress ultrasonic measurement is conducted on a bolt, the bolt needs to be stably clamped and fixed by means of the clamping mechanism according to different diameters of the bolt, after clamping is completed, the axial direction of the bolt is accurately positioned through the measuring mechanism, and then the axial stress of the bolt is accurately measured. Meanwhile, the water in the constant-temperature box is squeezed through the pressing plate, so that the air content in the constant-temperature box can be effectively reduced, formation and propagation of water waves are avoided, external interference is reduced, and ultrasonic measurement of the axial stress of the bolt is more facilitated.