190results about How to "Avoid adjustment" patented technology

The invention relates to a miniaturized closed-loop FID scalar atom magnetometer and an implementation method thereof, and belongs to the field of atom magnetic measurement. According to the method, the closed-loop working mode of the FID magnetometer is realized by utilizing a self-made electronics system, the modulation frequency of pumping light is corrected in real time, so that the magnetometer still keeps high sensitivity under a large magnetic field change rate, and the performance restriction between the dynamic range and the sensitivity of an open-loop FID magnetometer is broken through. The interaction between the self-made frequency meter and the time sequence control system is the core component of the closed loop of the magnetometer system. The device can measure a magnetic field with a large change rate at a high speed, is high in sensitivity and accuracy, and plays an important role in field magnetic measurement application.

The invention discloses an image measuring instrument with an auxiliary positioning function, and relates to the technical field of image measurement, the image measuring instrument comprises a placing frame and further comprises a positioning device, a placing hole is formed in the front side of the placing frame, a light supplementing device is arranged on the inner wall of the placing hole, a fixing rod is fixedly installed on the inner wall of the placing frame, and the positioning device is arranged on the fixing rod. Displacement equipment is slidably mounted on the circumferential surface of the fixing rod, image measurement equipment is arranged on the front side of the displacement equipment, a placement frame is fixedly mounted at the bottom of the inner wall of the placement frame, and the positioning device comprises a positioning groove, an electric push rod, a push plate, a supporting groove, a supporting rod, a supporting plate, a protection groove, a hollow block and a sliding block. The hollow block is limited by the sliding block, so that the push plate cannot continuously move in the direction close to the positioning groove, scraping and indentation on the surface of the workpiece can be reduced through reasonable clamping force, it can be ensured that the workpiece is kept at the stable position in the measuring process, and displacement or inclination caused by improper clamping is avoided.

A converter station AC filter group circuit breaker abnormal arcing modeling analysis method comprises the following steps: firstly, carrying out time mark alignment, amplitude calibration and filtering de-noising on wave recording signals such as AC bus voltage and filter branch current to obtain high-quality input data; then, combining a primary wiring diagram, enabling an alternating current system to be equivalent to an ideal power supply and series impedance, enabling circuit breaker arcing to be equivalent to arc resistance changing along with time, and constructing an equivalent circuit model comprising the power supply, the impedance, a capacitor, an electric reactor and dynamic arc resistance; establishing a state space equation according to a voltage and current constraint relation, and performing time domain solution by adopting a two-step two-order or three-order diagonal implicit Runge-Kutta method to obtain voltage and current responses of the whole process of the fault; on this basis, the arc resistance change is inversed according to the ratio of arc voltage to current, the current zero passage is identified through the resistance symbol change at adjacent moments, and the zero passage section is smoothed; and finally, the inversion result is verified again by means of the simplified equivalent model.

The invention discloses an adjusting and optimizing method and system based on a large power dispatching model, and belongs to the technical field of power dispatching, and the method comprises the following steps: obtaining historical power dispatching knowledge, and dividing the historical power dispatching knowledge into regional knowledge and global knowledge based on regional characteristics; constructing a first teacher model based on the difference between the global knowledge and the regional knowledge, and constructing a student model based on the lowest fluctuation cost; obtaining regional scheduling correlation according to historical power scheduling knowledge, and constructing a second teacher model according to the regional scheduling correlation; associating the first teacher model, the second teacher model and the student model based on knowledge distillation, and constructing a large power dispatching model; and outputting a tuning strategy according to the large power dispatching model and the current power data. The beneficial effects of the invention are that the output of the power tuning strategy gives consideration to pertinence and efficiency.

The present invention discloses a casting process measurement and control system based on cloud computing, comprising a data acquisition module, a process control module and a mold detection module, characterized in that: the data acquisition module is used to collect equipment operation data and visual images and temperatures of castings, and enter comprehensive parameters of castings to be produced into the system; the process control module is used to analyze the visual images and temperatures of castings, further analyze the operation parameters of the equipment, and adjust the operation parameters of the equipment according to the analysis results; the mold detection module is used to analyze the comprehensive parameters of castings, select raw materials and make corresponding casting molds according to the analysis results; the data acquisition module, the process control module and the mold detection module are electrically connected to each other; the data collection module comprises a sensor module, a visual module and a casting comprehensive parameter entry module; the sensor module is used to collect equipment operation data; the present invention has the characteristics of high accuracy and high production efficiency.

The invention provides a parking path planning method and device, a storage medium and an electronic device, and the method comprises the steps: determining the parking direction of a vehicle, and obtaining the environment perception information of the vehicle before parking; a path end point channel of the vehicle is calculated according to the parking-out direction and the environment perception information, and the path end point channel corresponds to the distribution range of path end points of a parking-out path of the vehicle; and planning a parking path meeting a collision constraint condition based on the path end point channel. According to the embodiment of the invention, the technical problem of low flexibility of planning the parking path of the vehicle in related technologies is solved, the flexibility of planning the parking path is improved, and the planning success rate of the parking path is also improved.

The invention provides a diversified distance-adjusting and positioning cutting device for plates, and relates to the technical field of plate cutting, the diversified distance-adjusting and positioning cutting device comprises a base structure, and transmission assemblies are arranged at the left end and the right end of the base structure; the stretching structure is arranged at the upper end of the transmission assembly, and the upper end is connected with the adjusting assembly. The adjusting assembly comprises a base; the connecting rods are mutually connected to form a shear fork mechanism, the two ends of the shear fork mechanism formed by the connecting rods are connected to the connecting plate and the inner sliding plate respectively, meanwhile, the shear fork mechanism is connected with the mounting structures, and a measuring plate on the adjusting assembly has the effect of accurately positioning the positions of the mounting structures; the problem that positioning is difficult during secondary cutting is avoided, the plate cutting efficiency is also improved, and the problems that cutting equipment can only conduct single-time cutting, meanwhile, positioning is difficult to conduct during secondary cutting after primary cutting is caused, and common equipment can only conduct one-way cutting on plates are solved.

The invention relates to the technical field of power distribution, in particular to a power distribution method and device for a non-condensation environment of a flexible charging pile and computer equipment. Comprising the following steps: acquiring temperature and humidity data inside and outside a charging pile through a sensor, and correcting and calibrating the data based on an external environment fluctuation factor to obtain accurate temperature and humidity distribution data; analyzing temperature distribution, identifying an area with a relatively large temperature gradient, generating an airflow adjustment scheme, and adjusting an internal airflow to enable a temperature field to tend to be uniform; monitoring the temperature and humidity data of the key part, judging the water vapor adhesion probability, and performing local dehumidification or heating intervention when necessary; and the change trend of the electrical insulation performance is continuously monitored, the airflow strategy is optimized, self-adaptive power distribution and airflow adjustment are carried out according to the optimization result, and stable operation of the charging pile is ensured. According to the invention, the problem of water vapor adhesion possibly caused by the charging pile in a non-uniform temperature and humidity environment is solved, and stable and efficient operation of the charging pile in a complex environment is realized.

The invention provides a laser radar adjusting method and system for rainy and foggy weather, a medium and a vehicle, and belongs to the technical field of intelligent driving, and the method comprises the steps: obtaining real-time weather state information which comprises at least one of rainfall information and foggy weather visibility information; based on the real-time weather state information, calculating an influence factor of a current weather condition on a laser radar atmospheric propagation path; based on the influence factor, determining a laser radar atmospheric attenuation coefficient under the current weather condition; and based on the atmospheric attenuation coefficient, adjusting working parameters of the laser radar to compensate echo signal intensity reduction caused by atmospheric attenuation. According to the invention, the accuracy of laser radar adjustment in rainy and foggy weather is improved, and the intelligent degree and safety of intelligent driving are improved.

The high-strength hollowed-out support with the anti-rust function for the computer displayer comprises a supporting base, a fixing piece is arranged below the supporting base, a supporting outer cover is fixedly installed on the upper surface of the supporting base, and a lifting inner cover is connected to the inner wall of the supporting outer cover in a sliding mode. A direction adjusting part is arranged at the top end of the lifting inner cover, and a connecting plate is arranged above the direction adjusting part. The height of the displayer can be automatically adjusted, compared with a traditional manual adjusting mode, the adjusting flexibility is improved, in addition, the direction of the displayer can be adjusted by starting the first gear motor to drive the rotating shaft to rotate, the inclination angle of the displayer can be adjusted by starting the second gear motor to drive the rotating rod to rotate, and the adjusting effect is good. Rotation in the horizontal direction and fine adjustment of the inclination angle can be rapidly adjusted, and the problem that the angle and height of a traditional displayer are inconvenient to adjust is solved.

A dust cleaning device and a cleaning robot system are provided. The dust collecting device includes a box body (100), a dust bag assembly (200), a box cover (300), and a trigger structure (400), a detect switch (500) and a controller which are all arranged in the box (100); the trigger structure (400) is movable between an initial position and a trigger position, the trigger structure (400) does not trigger the detect switch (500) when it is located at the initial position; however, the trigger structure (400) triggers the detect switch (500) when it is located at the trigger position; when the dust bag assembly (200) is mounted in the box (100) and the box cover (300) covers the box (100), the dust bag assembly (200) and the box cover (300) respectively push the trigger structure (400) so as to enable the trigger structure (400) to move from the initial position to the trigger position and trigger the detect switch (500); the controller is electrically connected to the detect switch (500), the controller makes restriction on an operation of the dust collecting device when the detect switch (500) is in an untriggered state, and releases the restriction on the operation of the dust collecting device when the detect switch (500) is in a triggered state. The dust collecting device realizes a correlative detection on whether the dust bag assembly is in place and whether the box cover covers the box body through a simple structure. The dust collecting device has a high detection accuracy, and better operating performance.

The application discloses an electric energy-frequency modulation out-clearing method and system considering energy storage energy state elasticity, comprising the following steps: acquiring power grid topology, load prediction data and power grid operation constraint parameters, receiving the frequency modulation market declaration information and the electric energy market declaration information submitted by market subjects; determining the winning frequency modulation capacity and the frequency modulation mileage out-clearing price of each market subject according to a preset frequency modulation out-clearing rule; taking the frequency modulation market out-clearing result as a boundary condition, constructing an electric energy market out-clearing model considering energy storage energy state elasticity, setting the state of energy (SOE) of the energy storage operator at the end time as an optimization variable, and introducing the SOE adjustment cost curve into the objective function; solving the model to determine the day-ahead time node marginal price, the day-ahead time generation power of the generation unit operator, the day-ahead time charging and discharging power of the energy storage operator and the SOE at the end time, and converting the same into a power grid dispatching instruction; and performing frequency modulation market settlement and electric energy market settlement according to the out-clearing result.

The utility model relates to the technical field of steam extraction flow stabilizing equipment of steam turbines, and particularly discloses a power station industrial steam extraction small-flow adjusting device which comprises a steam extraction main pipe and an adjusting pipeline, the steam extraction main pipe is communicated with the adjusting pipeline, a sunken U-shaped pipe is arranged in the middle of the adjusting pipeline, and an automatic adjusting valve is installed on a bottom pipeline of the U-shaped pipe. A filter and a drain pipe are further installed on the U-shaped pipe, the filter is located in front of the automatic regulating valve, and the drain pipe is located behind the automatic regulating valve; the design of the U-shaped pipe is adopted, steam conveyed by a low-pressure steam pipe network is collected and climbs through the U-shaped pipe, pressure relief and drainage are conducted through timing opening of the drainage pipe, air in the pipeline is discharged, the arrangement pressure and flow in the pipeline are adjusted to be more stable, and the problems of adjustment oscillation and large pressure fluctuation are avoided; an automatic regulating valve is adopted for starting control at the bottom full pipe position, the flexible regulating capacity of an energy system is improved, the resource utilization rate is increased, and economic benefits are created for companies.

The utility model discloses a bag making machine heat sealing cold cutting device for PE shrink bags, which comprises a base, a cold cutting assembly and a storage assembly, the cold cutting assembly is positioned between two groups of support plates, the cold cutting assembly comprises a cold cutter, a second guide rod, a connecting rod, a cam and a motor, the output end of the motor is connected with the cam, and the cam is connected with the storage assembly. The outer side of the cam is connected with the connecting rod, two sets of second guide rods are arranged on the inner side of the supporting plate, the two sets of second guide rods are provided with the cold cutting knife in a penetrating mode, a pressing roller is arranged between the heat sealing knife and the cold cutting assembly, and a through hole is formed in the inner side of a stacking table in a penetrating mode; the negative pressure cavity is formed below the stacking table, and the exhaust fan is connected to the outer side of the negative pressure cavity. According to the PE bag hot-sealing device, hot-sealed PE bags can be pressed, positioned and adjusted, so that the situation that hot-sealing lines and cold-cutting lines of the PE bags are inconsistent is prevented, the situation that the shapes of the formed bags are not uniform is avoided, and the quality of the PE bags is improved advantageously.

The present application relates to the technical field of industrial automation control, in particular to a polyvinyl chloride polymerization reaction intelligent control system, the system comprises a trend identification module, a coupling analysis module, a target generation module, a deviation evaluation module and a control execution module.In the present application, the change direction of the polyvinyl chloride chain growth rate and the temperature rise amplitude is combined and analyzed, which surpasses the dependence on single parameter threshold, realizes early identification of potential risks such as reaction acceleration or retardation, introduces external meteorological changes as a key variable, quantifies the coupling influence with the internal reaction state, makes the temperature control change from passive response to prediction-based proactive intervention, and the regulation and control target constructed on this basis not only dynamically associates the current working condition and environmental disturbance, but also can be adapted according to the real-time capacity of the cooling device, and before executing specific adjustment, the expected response of the control action is deduced by referring to historical similar data, and the possible deviation between the adjustment result and the target is quantified.

The utility model is suitable for the technical field of belt tensioning wheel and provides a variable resistance belt tensioning wheel, which comprises a mounting seat, a tensioning assembly is arranged on the mounting seat, a tensioning arm is arranged on the tensioning assembly, the setting of the tensioning assembly, the synchronous movement of the tension spring and the tensioning arm ensure that the tensioning wheel is always in contact with the belt, the tension of the belt is maintained moderate, the probability of belt loosening is reduced, the stability of the transmission system is improved, the stretching and compression of the tension spring are controlled by fluid damping effect, the change of the tension spring is more stable, the rapid adjustment of the tensioning wheel is avoided, the design improves the accuracy and reliability, the width of the fluid path of the drainage valve is adjusted by rotating the speed regulating handle, the fluid resistance is adjusted, and thus the damping is adjusted according to the specific requirements of the transmission system, and the performance is optimized; the setting of the reverse locking assembly realizes the reverse locking limitation of the tensioning wheel, and further improves the safety of the transmission system.

The present application relates to the technical field of frequency converter energy saving, and particularly relates to a mine-used explosion-proof frequency converter energy saving optimization system, which specifically comprises: an upper computer, a switch, a PID controller, a power distribution cabinet, a frequency converter, a driving motor, a belt conveyor, a laser radar sensor, a speed sensor and an intelligent frequency conversion module; the present application aims at the problem that the traditional coal flow measurement method of the transport scale causes a delay between measurement and control, uses the laser radar sensor to measure the coal flow on the belt conveyor in an integral method, eliminates the hysteresis effect and improves the measurement accuracy; aiming at the problem that the traditional PID control strategy has low control accuracy, the intelligent frequency conversion module is proposed, and the energy saving optimization model based on the BP neural network and the PID control model based on the fuzzy neural network are used in the intelligent frequency conversion module to realize the frequency conversion control of the belt conveyor, so that the belt conveyor can maintain high energy saving efficiency and high reliability.

The prefabricated directly-buried thermal insulation pipe comprises a pipeline A, a connecting piece B and a connecting piece B. The pipeline A is composed of a protective layer, an outer pipe, a thermal insulation layer, a reinforcing net, a thermal insulation material, reinforcing strips and an inner pipe, the outer pipe is arranged in the protective layer, the thermal insulation layer is arranged in the outer pipe, the reinforcing net is connected into the thermal insulation layer, and the reinforcing net is connected into the thermal insulation material. A reinforcing net is arranged in the pipeline A, a heat preservation material is arranged in the reinforcing net, an inner pipe is arranged in the heat preservation material, reinforcing strips are arranged on the outer surface of the inner pipe, a connecting piece B is arranged outside the pipeline A, and a connecting piece B is movably connected outside the pipeline A. Through the arrangement of the reinforcing strips, the overall strength of the inner pipe is improved, the connecting area of polyurethane foam and the inner pipe is increased, the risk of separation of the polyurethane foam is reduced, the connecting piece B is rotated to enable a threaded hole in the connecting piece B to be aligned with a mounting bolt on the connecting piece A, and therefore the connecting piece A and the connecting piece B can be conveniently connected, and pipeline adjustment is avoided.

The invention discloses granary pressure control equipment and method, and the equipment comprises an evaporation cavity which is internally provided with an evaporator and an evaporation fan; the air supply pipe assembly and the air return pipe assembly are used for communicating the evaporation cavity with the granary; the air valves are arranged in the air supply pipe assembly and the air return pipe assembly respectively; the control center is electrically connected with the pressure sensor, the temperature sensor, the CO concentration sensor and the air valves; wherein the control center is used for judging the cause of unbalanced pressure in the granary according to the detection results of the pressure, the temperature and the COconcentration in the granary and correspondingly controlling the opening or closing state of each air valve so as to adjust the pressure in the granary. According to the invention, by carrying out structure transformation and control logic upgrading on the existing granary air conditioning equipment, the granary pressure regulation, the COconcentration regulation and the air conditioning refrigeration function are integrated in the same equipment, so that the cooperative control of the granary environment is realized.

This invention discloses a liquid-cooled collaborative intelligent temperature control method and system based on layered PCM, relating to the field of liquid-cooled temperature control technology. The method includes: S1, real-time acquisition of liquid-cooled temperature control data and preprocessing of the data; S2, calculation of the sensible and latent heat absorption of the outer and inner PCM layers, assessment of the risk of thermal imbalance on the conductor surface, determination of the current thermal state, and output of a thermal risk warning signal; S3, assessment of the degree to which cable bending weakens thermal coupling performance, triggering a layered PCM collaborative temperature control strategy, and execution of graded control commands for the power pump, circulation pump, and three-way valve; S4, assessment of the deviation between the current heat exchange capacity and the heat load demand, correction of the cooling response coefficient, and optimization of the PCM collaborative temperature control strategy. This solves the problems of unstable thermal coupling between the coolant pipe and the heating conductor in existing liquid-cooled cables, and the tendency for pipe deformation and contact thermal resistance and localized hot spots to occur with frequent bending.

The present invention discloses a resistor device for a high-voltage circuit breaker, comprising a conductive rod, a clamping plate is provided on the surface of the conductive rod, two clamping plates are fixed to the surface of the conductive rod by screws, a first resistor seat and a second resistor seat are provided on one side of the clamping plate, the first resistor seat and the second resistor seat are provided in the axial direction of the conductive rod, the first resistor seat and the second resistor seat are connected to the clamping plate by an insulating fixing seat, a mounting groove is provided on one side of the first resistor seat and the second resistor seat, a resistor is provided between the first resistor seat and the second resistor seat and in the mounting groove, and the resistor is electrically connected to the first resistor seat and the second resistor seat, and the present invention relates to the technical field of high-voltage electrical equipment. This resistor device for a high-voltage circuit breaker solves the problem of the resistor structure being too large in the existing high-voltage circuit breaker, reduces the overall volume, has no mounting holes in the contact part, optimizes the electric field, and improves the reliability of the product.

The utility model relates to the field of welding equipment, in particular to a welding platform of a welding robot, which comprises a welding table for fixing and supporting, a locking clamp for clamping parts, a fixing mechanism for releasing stress after the parts are welded, and a locking mechanism for limiting the position of the fixing mechanism, a plurality of sets of fixing mechanisms are installed on the welding table, the fixing mechanisms are installed on the welding table in a matched mode through the locking mechanisms, and the locking clamps are installed on the fixing mechanisms. By means of the locking mechanisms in the sliding locking tables, stress is resisted by means of the slidable ranges of the multiple sets of sliding locking tables and elastic potential energy of the internal buffering assemblies after large parts or parts with many bends are welded and under the condition that stress needs to be released instantly, so that safety is improved, a complex adjusting clamp does not need to be replaced, and cost is reduced. Adjustment of the clamp is avoided, and follow-up accurate positioning and workpiece clamping are facilitated.

This utility model relates to the field of cutting tool manufacturing technology, specifically a clamping device for cutting tool production and processing. It includes a frame, a battery, and clamping components. A motor a is mounted on the frame, and an adjustment disc is located at the output end of motor a. The battery is detachably mounted on the frame. Multiple clamping components are evenly arranged in a ring on the adjustment disc. Each clamping component includes a first clamping frame mounted on the frame, a gear a and a synchronous pulley a located at the output end of motor b, a synchronous pulley b and a gear b rotatably mounted on the first clamping frame, a pair of racks slidably mounted at each of the upper and lower ends of the first clamping frame, and clamping plates and conveying components corresponding to each pair of racks. The multiple first clamping frames are all inclined. This utility model uses the inclined placement of the first clamping frames to allow the cutting tool to contact the first clamping frame under its own weight, thereby restricting the position of the cutting tool and improving the machining accuracy of the cutting tool.

The invention discloses an electricity purchasing structure adjusting method and system, and relates to the technical field of electricity utilization adjustment, historical electricity purchasing information of a user side is collected, the historical electricity purchasing information comprises a historical electricity purchasing structure, electricity purchasing cost and user electricity utilization behavior information, and the user side is classified to obtain a plurality of electricity utilization types; constructing a user electricity purchasing model according to the electricity consumption type and the corresponding historical electricity purchasing information, carrying out information binding on the user electricity purchasing model and the corresponding user side, and storing the information in a database; obtaining the safety state of the user electricity purchasing model in the database, and taking the user electricity purchasing model corresponding to the safety state meeting a preset condition as a safety model; and the electricity purchasing structure of the user side is adjusted through the security model. According to the method, the external network is prevented from invading the database through the protective net, then the user electricity purchasing model is stored in the information storage library, and the database and the user side are connected based on double ports to obtain the incidence relation.

The utility model relates to the technical field of clamp, and disclose a kind of grinding processing positioning fixture for large workpiece, including operation platform, the both ends of operation platform are slidably connected with two mobile supports, and the top of mobile support is equipped with installation groove, and the inside of installation groove is installed with mounting block, and the one end of mounting block is fixedly connected with chuck device, and the both sides of mounting block are equipped with circular groove, and the inside of circular groove is fixedly connected with first spring, and the other end of first spring is fixedly connected with connecting block, and the both sides of mobile support are equipped with circular perforation, and the surface of connecting block is slidably connected with the inside of circular perforation.The grinding processing positioning fixture for large workpiece can allow user to freely select different specifications of chuck device according to the shape of workpiece and processing task, which can avoid processing step adjustment or multiple clamping caused by mismatch of chuck device, thereby simplifying processing procedure and improving production efficiency.

The utility model discloses a surface processing and polishing device based on a steel template, which comprises a machine body, a polishing mechanism is arranged on the right side of the machine body and used for polishing the steel template, and a positioning mechanism is arranged on the top of the machine body and used for operating the top of the steel template. A steering mechanism is arranged in the machine body and used for driving a steel formwork to rotate, the steering mechanism comprises a steering assembly, the steering assembly comprises a rotating rod rotationally installed at the bottom of an inner cavity of the machine body, and the top of the rotating rod is fixedly connected with a containing plate. According to the polishing device based on steel template surface machining, under the driving of the driving motor, the placing plate and the steel template placed on the top of the placing plate are made to do 90-degree intermittent rotation, the situation that the steel template is manually adjusted for multiple times is avoided, a follow-up polishing mechanism is matched, rapid polishing operation on the four side edges of the steel template is achieved, and then the working efficiency is improved.

This utility model relates to the field of sanitation vehicle technology, and in particular to a detachable garbage truck hook arm device, comprising: a hook arm with a connecting column fixed at its top, the connecting column having a hollow inner cavity, an external thread on its top outer wall, and two symmetrically positioned openings circumferentially on its outer wall; a hook head with a cover fixed at its bottom, the cover having an installation cavity inside, the inner wall of the installation cavity having an internal thread adapted to the external thread of the connecting column; wherein the working swing direction of the hook head is orthogonal to the line connecting the centers of the two positioning openings; a latching mechanism, radially elastically telescopically disposed in the installation cavity of the cover, comprising a latch adapted to the positioning openings; and an unlocking mechanism, slidably sleeved on the outer wall of the connecting column, the sliding path of which covers the positioning openings of the connecting column; the present application aims to provide a garbage truck hook arm device, wherein the hook head can be quickly installed and disassembled, thereby solving the technical problems of difficult, costly, and time-consuming repair and replacement of hook heads after wear in the prior art.

The invention belongs to the technical field of string adjustment, and particularly relates to a violin string tension adjustment control device which comprises an adjustment chamber, adsorption units are symmetrically arranged at one end of the adjustment chamber, positioning units are arranged on the sides, close to the adjustment chamber, of the adsorption units, an adjustment unit is arranged on one side in the adjustment chamber, and a feedback unit is arranged on one side of the adjustment unit. Through the lifting effect of the electric telescopic rod and the face-to-face or back-to-back movement between the idler wheels, lifting and sudden release of strings are achieved, then radial jumping of the strings is degraded and buffered through the multi-degree-of-freedom string roller, dominant impact between the lower electrode cap and the electrode ball is controlled through the prying roller short section, and therefore the electrode ball can be driven to move stably and stably. The high-frequency impact state between the strings and the long section of the prying roller is expressed, that is, impact feedback of the strings in a low-frequency state is explicitly and prominently expressed through an extended range, the change of tension is accurately sensed, excessive or insufficient adjustment is avoided, the overall tone balance is optimized, and the harmony degree and expressive force of the tone of the violin are improved.

The utility model discloses a rice transplanter convenient to adjust rice transplanting density, which comprises an underframe, an interval adjusting mechanism, a position fixing mechanism and a clamping auxiliary mechanism, the interval adjusting mechanism comprises an operating frame, a driven wheel, a rice transplanting frame, a rice transplanting groove, an adjusting block and an adjusting plate, the position fixing mechanism comprises a clamping pipe, a clamping rod, a turntable, a first guide groove, a second guide groove and an embedded plate, and is slidably mounted in the rice transplanting groove through an adjusting block, so that an operator can conveniently adjust the rice transplanting interval, the rice transplanting density is accurately controlled, and the requirements of different crops and fields are met; the rice transplanter can accurately fix the position of the adjusting block through the design of the components such as the clamping pipe, the clamping rod and the turntable, and looseness or misoperation in the working process is avoided, so that the consistency and stability in the rice transplanting process are ensured, and looseness or failure of the rice transplanter caused by vibration or external force in the working process is avoided.