121results about How to "Stable output" patented technology

An output drive circuit includes: a totem-pole output including: a high-side transistor (HST) with drain and source, an output stage power supply voltage applied to the drain, the source connected to the first node (N1); and a low-side transistor with source and drain, a ground voltage applied to the source, the drain connected to N1; and a bootstrap part including a capacitor supplying charge to a gate of HST when on, the charge being charged when HST is off, and one terminal of the bootstrap part connected to N1, the output drive circuit further including: a first transistor (T1) that conducts when HST is to be on, T1 connected between a drive circuit power supply voltage and the gate of HST; and a second transistor conducting when HST is to be turned on, the second transistor connected between the other terminal of the capacitor and HST gate.

The invention relates to a czochralski method-based crystal growth interface shape detection method and device. The method comprises the steps that: a seed crystal temperature T and an interface electromotive force U at the same time in a crystal growth process are collected, and a T-U curve of the interface electromotive force U changing with the seed crystal temperature T is obtained; the change trend of the shape of a crystal growth interface in real time is judged by observing the deviation between the T-U curve and a reference line, wherein the reference line is a straight line passing through the starting point of the T-U curve, and the slope of the straight line is the Seebeck coefficient of the crystal. The invention also relates to a device used by the method. The detection method provided by the invention can detect the change trend of the shape of the crystal growth interface in real time in the crystal growth process, and can be applied to Czochralski method growth equipment for various single crystals such as lithium niobate, lithium tantalate, sapphire, yttrium aluminum garnet and the like.

This utility model relates to the field of electrical energy detection technology, and proposes a high-current electrical energy detection device with closed-loop control function. The device includes: a programmable power source module, including an output drive unit for outputting current, voltage signals, and waveforms within a large current range; a standard measurement module connected to the output drive unit for detecting the current, voltage signals, and waveform parameters output by the output drive unit; a waveform sampling module connected to the output drive unit for sampling the waveform output by the output drive unit; a closed-loop control module bidirectionally connected to the programmable power source module and the waveform sampling module for adjusting the current, voltage signals, and waveforms; and an external device detection interface connected to the output terminal of the output drive unit for connecting different types of high-current metering devices. This utility model solves the problems of measurement error superposition, unstable output, and insufficient measurement range in traditional detection devices.

The application discloses a steam generator with multiple modules and a control method. The steam generator comprises a first steam generating unit and a second steam generating unit, the first steam generating unit is provided with a first steam outlet, the second steam generating unit is provided with a second steam outlet, and the first steam outlet and the second steam outlet are in time-sharing switchable communication with a steam discharge main channel; one of the first steam generating unit and the second steam generating unit is in communication with the steam discharge main channel to discharge steam, and the other is disconnected from the steam discharge main channel to generate and accumulate steam, and the states of the two are time-sharing switched; the steam generating unit in the steam discharging state is powered off, and steam output is maintained by using waste heat. The steam generator and the control method provided by the application can work with the power consumption value of a single steam generating unit, and continuous and stable high-pressure steam can be provided through asynchronous working and timely switching without increasing the total power consumption of the steam generating unit.

This invention provides an infrared thermal imaging method, relating to the field of infrared thermal imaging technology. The method utilizes a germanium infrared lens in an infrared thermal imaging system, whose surface is sequentially composed of subwavelength micro / nano structures and an anti-reflection film structure from the inside out. The infrared thermal imaging method includes: focusing target infrared radiation through the germanium infrared lens onto an infrared detection array; the infrared detection array converting the target infrared radiation into an electrical signal matrix; performing noise reduction and gain correction on the electrical signal matrix to obtain a preprocessed electrical signal matrix; performing temperature compensation on the preprocessed electrical signal matrix based on a temperature compensation formula and a transmittance temperature model to obtain a corrected signal matrix; and sequentially performing non-uniformity correction, image enhancement, and pseudo-color mapping on the corrected signal matrix before outputting and displaying the result. Using the method of this invention, higher transmittance, lower reflection loss, and more stable thermal imaging can be achieved.

This invention discloses a comprehensive energy operation simulation method and system based on multi-objective optimization, belonging to the field of energy technology, aiming to solve the problems of equipment overload and discontinuous power supply caused by supply and demand imbalance under extreme climate conditions. The method establishes a multi-objective collaborative optimization model based on the renewable energy types and seawater desalination load characteristics of the island microgrid. An improved NSGA-III algorithm is used to simulate the model and generate a scheduling scheme, including the start-up and shutdown sequence of the hydrogen production equipment. When a typhoon warning signal is received, the seawater electrolysis hydrogen production equipment is forcibly locked, and the output power of the diesel generator is fixed within a preset range. During the operation of the hydrogen production equipment, the output fluctuation data of the wave energy generator is collected in real time, and the operating power of the reverse osmosis seawater desalination unit is adjusted through a dynamic correction algorithm. When the hydrogen storage capacity of the hydrogen production equipment reaches a threshold, the power lock of the diesel generator is released, switching to a multi-energy coupling control mode, and the charging and discharging strategy of the energy storage equipment is updated synchronously.

The utility model relates to a kind of device of pulse laser pulse sub-string, including pulse laser, laser attenuation device, laser beam-reducing device, laser polarization device, wave sheet, Pockels cell, output mirror, waveform detection device, and output mirror is to the waveform detection device output first light beam and to the original light path reflection second light beam;Laser polarization device side is also configured full mirror;Pockels cell is connected with high-voltage pulse generator, pulse laser is also connected with digital delay pulse signal generator, and digital delay pulse signal generator is used to send synchronization signal to high-voltage pulse generator to control high-voltage pulse generator to generate voltage pulse when pulse laser emits laser beam reaches Pockels cell.This application realizes the stable control and output of pulse sub-string by the electro-optic modulation characteristics of Pockels cell, compared with traditional method of improving laser repetition frequency, implementation is simple, and use component is less, while guaranteeing stability, reduce cost.

A router charging circuit and a router using the charging circuit, belonging to the field of communications, include: a transmitting circuit for filtering, regulating, and amplifying the power supply voltage signal; a rectifier and voltage regulator circuit for rectifying and regulating the power supply voltage signal to output a stable current signal; a charging management circuit for real-time detection of the backup power module's power level and sending corresponding control commands to the MCU based on the backup power module's power level; the MCU controlling the transmitting circuit and the rectifier and voltage regulator circuit to perform corresponding operations based on the control commands; and a manual switch connected to the backup power module for turning the backup power module on and off. This invention can prevent power outages and other emergencies by activating the backup power module to provide timely power to the router, ensuring its normal operation.

The utility model relates to wind power generation technical field discloses wind power generation device, including support subassembly, wind wheel subassembly and power generation subassembly, wind wheel subassembly includes main shaft and impeller, and the main shaft fixed mounting is in support subassembly, and the impeller rotatablely installs on the main shaft, power generation subassembly includes first power generation unit and second power generation unit, and the stator of first power generation unit and second power generation unit all fixed mounting is in main shaft, and the outer rotor of first power generation unit and second power generation unit all are connected with the impeller fixedly, the utility model under the same wind force condition, first power generation unit and second power generation unit can work simultaneously, and the mechanical energy of impeller capture is more efficient, more fully converts into electric energy, effectively increases the overall power generation, improves the wind energy utilization efficiency and power generation efficiency, solves when the outside wind speed is at the low level, and the overall power generation of generator is insufficient.

This invention provides a three-trailer collaborative aircraft transfer method and system based on multi-sensor fusion. This invention relates to the field of aircraft ground support technology, specifically to a three-trailer collaborative aircraft transfer method based on multi-sensor fusion, applicable to short-haul aircraft ground transport to hangars. Through multi-sensor data fusion and multi-trailer collaborative control, it improves transfer accuracy, safety, and efficiency. The method specifically includes the following steps: system setup and sensor calibration; trailer attitude initialization and collaborative parameter configuration; real-time acquisition and preprocessing of multi-sensor data; multi-sensor data fusion and state estimation; dynamic path planning based on fused data; attitude error quantification and calibration based on complex statistics; multi-trailer collaborative driving control and traction distribution; real-time environmental monitoring and risk warning; precise docking at the hangar entrance and attitude fine-tuning; and parking and system review and optimization.

This utility model relates to the field of shampoo bottle technology and discloses a shampoo bottle with a metering function. The bottle includes a bottle body, a dispensing mechanism at the top of the bottle body, and a metering mechanism. The metering mechanism includes a first fixing ring fixedly connected to the top of the bottle body. A T-shaped groove is formed at the top of the first fixing ring, and a T-shaped ring block is slidably connected within the T-shaped groove. This shampoo bottle achieves precise metering dispensing through its unique metering mechanism design. The fixing cylinder, slider, spring, and limiting block in the metering mechanism work together. When dispensing is pressed, the slider slides within the fixing cylinder and compresses the spring. The spring force and the limiting block restrict the slider's stroke, precisely controlling the amount of shampoo dispensed with each press. This avoids waste or inconvenience due to excessive or insufficient dispensing, meeting the user's need for precise control of shampoo usage.

This invention relates to the field of refrigeration equipment control technology, specifically to an adaptive control method for condenser operation in silicone oil production lines. The method includes: First, based on historical production data, determining a reference range for the condenser outlet vapor phase temperature to produce silicone oil with preset quality indicators, and determining a target temperature within this range based on historical operating efficiency. Second, during production, using a model predictive control algorithm to adjust the condenser's operating parameters in real time, bringing the predicted future outlet temperature closer to the target temperature. Finally, based on the recent changes in actual operating efficiency with temperature and the difference between historical and predicted trends in outlet temperature, the target temperature is dynamically readjusted. This invention achieves adaptive tracking and coordination of the condenser with the de-boiling vessel conditions, ensuring key indicators such as product viscosity and volatile matter content while further achieving energy saving and efficient recovery of low-boiling-point substances in the production process.

The invention discloses a big data-based roadside holographic sensing platform data synchronization method and system, relates to the technical field of smart traffic, and aims to improve the accuracy of global traffic situation sensing in heterogeneous data synchronization and fusion processes of an existing roadside holographic sensing platform. The method comprises the following steps: acquiring heterogeneous data with time stamps from a plurality of pieces of edge sensing equipment, and respectively collecting the plurality of pieces of heterogeneous data into respective corresponding sliding time windows according to the time stamps carried by each piece of heterogeneous data; according to the data integrity score and the data credibility score, one fusion strategy is selected from multiple preset data fusion strategies, and the multiple data fusion strategies at least comprise a standard fusion strategy and a degradation fusion strategy; and performing fusion processing on the heterogeneous data in the sliding time window according to the selected fusion strategy to generate a global traffic situation view with a data quality identifier.

The application provides a multi-station aluminum sleeve and steel core mounting method, which comprises the following steps: step one, feeding a pipe to a heading mechanism, and extruding and drumming the pipe by the heading mechanism to form a first positioning ring; step two, sequentially processing the pipe by a spiral groove mechanism and a chamfering mechanism; step three, feeding an aluminum sleeve and a steel core to a first discharge block and a second discharge block of an aluminum sleeve and steel core feeding mechanism, and selecting a mounting mode, i.e., separately mounting the aluminum sleeve, separately mounting the steel core, simultaneously mounting the aluminum sleeve and the steel core, or not mounting the aluminum sleeve and the steel core; step four, if the mounting mode is separately mounting the aluminum sleeve, separately mounting the steel core, or simultaneously mounting the aluminum sleeve and the steel core, then the corresponding aluminum sleeve or steel core is clamped to an aluminum sleeve and steel core mounting mechanism by a feeding clamp jaw, and the aluminum sleeve or steel core is mounted on the pipe by the aluminum sleeve and steel core mounting mechanism; and step five, after the aluminum sleeve and the steel core are mounted, and if the selected mounting mode is not mounting the aluminum sleeve and the steel core, then the pipe is discharged.

The application provides a polarization management device and a closed-loop control method thereof. The polarization management device comprises: a polarization separation unit configured to receive an input optical signal and split the input optical signal into a first transverse electric mode optical component and a first transverse magnetic mode optical component; a polarization conversion unit configured to receive the first transverse magnetic mode optical component and convert the polarization state of the first transverse magnetic mode optical component to obtain a second transverse electric mode optical component; a first phase adjustment unit configured to perform first phase adjustment on the second transverse electric mode optical component to obtain a third transverse electric mode optical component; a second phase adjustment unit configured to receive the first transverse electric mode optical component and the third transverse electric mode optical component, perform second phase adjustment, and combine the first transverse electric mode optical component and the third transverse electric mode optical component to obtain a coupled optical signal; a sampling monitoring unit configured to sample the coupled optical signal to obtain a monitoring optical signal, split the monitoring optical signal into a fourth transverse electric mode optical component and a second transverse magnetic mode optical component; and a controller configured to adjust the working state of the first phase adjustment unit and / or the second phase adjustment unit based on the fourth transverse electric mode optical component and the second transverse magnetic mode optical component.

The application discloses a double-fan-leaf suction-discharge structure of a centrifugal fan, and belongs to the technical field of centrifugal fans. The double-fan-leaf suction-discharge structure comprises an impeller, a volute, an air inlet, an air outlet, a motor, a connecting shaft, a bearing and a flow guide channel. The impeller is designed in a double-fan-leaf mode and comprises centrifugal blades and axial-flow blades. The impeller is located in the interior of the volute, and the interior of the volute is further provided with the flow guide channel. The application has novel design and ingenious device. The double-fan-leaf suction-discharge structure is arranged in the interior of the impeller shell and comprises centrifugal blades and axial-flow blades. The external gas is guided to enter the gap between the centrifugal blades in an orderly manner, the axial air suction capacity is improved, the phenomenon that the air pushed by the centrifugal blades overflows along the axial direction is inhibited, and thus the generation of backflow is reduced. The flow guide channel is arranged, the main channel changes from narrow to wide from the air inlet to the air outlet, the entering gas can be stably transported from the air inlet to the air outlet under the action of the main channel, the gas discharge efficiency is improved, and the discharge capacity is increased.

A device and method for detecting the pull-out force of planetary gear shafts in automatic transmissions belong to the technical field of automotive automatic transmissions. The device includes a base, a gantry bracket, replaceable testing support fixtures, a pressure detector, a testing platform, a pressure sensor, a hydraulic cylinder, replaceable pressure heads, guide columns, and a hydraulic mechanism. All components are rigidly connected. The fixtures and pressure heads are interchangeable to accommodate different specifications of planetary gears. The hydraulic mechanism supplies pressure to the hydraulic cylinders, and the pressure sensor collects force values. The testing method includes four steps: fixture adjustment, placement and positioning, pull-out detection, result judgment, and completion. Hydraulic force is applied to press the shaft, the sensor collects data, and the detector performs judgment, storage, and data export. This invention, through multi-system collaborative design, achieves accurate and quantitative detection of the pull-out force at the riveting joint of the planetary gear shaft. It combines versatility, convenience, and data traceability, effectively solving many shortcomings of existing testing methods and providing reliable assurance for riveting quality control.

This utility model relates to the field of rectifier and filter circuits, and more particularly to an AC input rectifier and filter circuit, including a rectifier bridge, a transformer, an anti-interference module, and an overvoltage protection module. A second safety Y capacitor CY2 and a third safety Y capacitor CY3 are connected in series. The third safety Y capacitor CY3 is connected to the N terminal of the mains power supply, and the second safety Y capacitor CY2 is connected to the L terminal of the mains power supply. The overvoltage protection module includes a varistor MOV1. The positive input terminal of a common-mode inductor L1 is connected to the L terminal of the mains power supply. The positive and negative output terminals of the common-mode inductor L1 are connected to the input terminals of the rectifier bridge, respectively. The positive output terminal of the rectifier bridge is connected to the positive terminal of a storage capacitor C3, and the negative output terminal of the rectifier bridge is connected to the negative terminal of the storage capacitor C3. The positive terminal of the storage capacitor C3 is connected to the transformer, and the transformer outputs 12V. This circuit enhances the anti-interference capability of the circuit by optimizing the design of the rectifier and filter circuit; at the same time, the introduction of overvoltage protection components such as a varistor improves the overvoltage protection capability of the circuit.

The present application relates to the technical field of pressure measurement, and particularly relates to a piezoelectric bias capacitive general flexible pressure patch. The piezoelectric bias capacitive general flexible pressure patch comprises, from top to bottom, a bias coupling electrode layer, and a piezoelectric bias module electrically connected with the bias coupling electrode layer; the piezoelectric bias module comprises a piezoelectric film and electrodes arranged on both sides of the piezoelectric film, and the electrodes comprise the bias coupling electrode layer arranged above the piezoelectric film and a first electrode layer arranged below the piezoelectric film; a pressure-capacitance conversion unit comprises a plurality of electrode layers arranged in a vertical direction and dielectric layers arranged between adjacent two electrode layers, and the dielectric layers comprise a plurality of micro-protrusions arranged at intervals; the uppermost electrode layer in the pressure-capacitance conversion unit is the first electrode layer, and the piezoelectric bias module and the pressure-capacitance conversion unit share the first electrode layer. The piezoelectric bias capacitive general flexible pressure patch is suitable for irregular surface application, pressure transmission is more uniform, and stable output can still be maintained in a humid, sweat, long-term contact environment.

A quantitative heating system and method for measuring seabed heat flow belongs to the field of marine geothermal exploration and thermal property measurement technology. The system includes a constant current drive module (1), a current acquisition module (2), a voltage acquisition module (3), a control and data processing module (4), a heating module (5), and a temperature acquisition module (6). The constant current drive module (1) provides a driving voltage to the heating module (5) to generate a heating current. The current acquisition module (2) is used to acquire the actual current value in the heating module (5) in real time. The system and method of the present invention accurately calculate the total heating amount and invert the thermal conductivity of sediments through PI closed-loop constant current control, resistance-temperature model correction, and power sequence smooth fitting integration, thereby solving the problems of unstable power and large error in traditional open-loop heating and significantly improving the accuracy of seabed heat flow measurement.

This invention discloses a method, apparatus, and product for detecting small targets in drone aerial photography, relating to the field of computer vision, to improve the detection performance and parameter efficiency of small targets in complex background scenes. In the visual feature extraction process, the aerial image is downsampled hierarchically using a spatial-to-channel rearrangement approach to obtain multi-layered downsampled feature maps. A multi-branch convolutional structure is used to enhance the receptive field of each downsampled feature map, resulting in multi-scale visual features. In the text semantic enhancement process, at least one cue vector most relevant to the aerial image is selected from a cue vector library. The cue vector is semantically enhanced to obtain enhanced semantic features, which are then fused cross-modally with the multi-scale visual features. A detection head is then used to identify the target based on the cross-modal fused features. This invention improves the accuracy, robustness, and generalization ability of small target detection in complex environments.

The utility model discloses a kind of plastic spraying solidification furnace waste gas waste heat recycling devices, including device ontology, the device ontology is equipped with plastic spraying solidification furnace, waste gas pipe, tubular heat exchanger, mounting bracket, connecting pipe, processing box, processing pipe, air inlet pipe, heating pipe, hot air machine, controller, support frame, temperature sensor, filter screen, access panel one, access panel two, mounting plate, handle, installation slot, strong magnet, the plastic spraying solidification furnace is connected with tubular heat exchanger by waste gas pipe, the tubular heat exchanger is arranged on mounting bracket, the tubular heat exchanger is connected with processing box by connecting pipe, processing pipe and air inlet pipe are provided on the processing box, heating pipe and hot air machine are provided on the processing pipe, the heat in the high-temperature waste gas generated by plastic spraying solidification furnace can be effectively recycled, recycled heat can be used for heating air etc., the efficient reuse of waste gas waste heat is realized, energy consumption is reduced, and the production cost of enterprise is reduced.

The application discloses a multi-output low-frequency picosecond mode-locked fiber laser based on a cascade contrast differential beam splitter, which comprises a fiber grating, a gain fiber, a cascade light splitting network, a saturable absorber and a pump coupler for injecting pump light into the gain fiber; the fiber grating, the gain fiber, the cascade light splitting network and the saturable absorber are sequentially connected and constitute a linear resonant cavity with a target set length, and the fiber grating in the linear resonant cavity is connected with the pump coupler to build a linear cavity fiber laser; the length of the entire linear cavity fiber laser can be controlled by controlling the target set length of the linear resonant cavity composed of the fiber grating, the gain fiber, the cascade light splitting network and the saturable absorber, so that the volume of the linear cavity fiber laser is smaller, and meanwhile, after the target set length of the linear resonant cavity is controlled, low repetition frequency can be realized directly in a fundamental mode without complex harmonic mode-locking control.

This invention discloses a positioning and detection structure for battery packaging tabs. The positioning and detection structure includes: a worktable, a fixture placed on the worktable, an aluminum-plastic film after punching a hole placed on the fixture, and a groove on the fixture containing a bare battery cell. Positioning components for positioning the tabs on both sides of the bare battery cell are respectively provided on both sides of the fixture opposite to the groove. The positioning components include positioning push blocks located on the upper side of the tabs. A detection element is also provided above the tabs. A controller is also provided on one side of the worktable. The controller is used to control the positioning push blocks to adjust the position of the tabs when they are misaligned. By taking a picture of the tabs using the detection element, the acquired image is transmitted to the controller. The controller marks the deviation of the tab position from a preset position range based on the tab position in the image and sends a correction command to an industrial control computer. The industrial control computer controls the positioning components to adjust the tab position, which can correct the tab misalignment and greatly improve production efficiency.

The utility model provides a kind of remote valve control integrated machine, including shell and motor, the shell is provided with connecting rod for the opening and closing valve, the shell is rotatably provided with the fixed block connected with connecting rod, the fixed block one end is symmetrically provided with large chute and small chute in circumferential direction, motor is connected with impact block, impact block is connected between motor by compression spring, impact block is fixed with large slider and small slider matched with fixed block, the width of large slider is greater than small chute and the width of small slider. The device is easy to operate, simple structure, impact block causes impact to fixed block, generates vibration, so that connecting rod drives valve stem to produce loosening, which facilitates subsequent driving valve stem to rotate and open / close valve.

This invention discloses a method and system for optimizing administrative text element extraction based on natural language processing, belonging to the field of natural language processing technology. The method performs multi-granularity semantic structure parsing on administrative texts to construct multi-granularity semantic structure representation data capable of simultaneously representing word semantics, sentence functional attributes, and textual organization relationships; identifies semantic fragments of candidate administrative elements and constructs an administrative element structure constraint graph to depict the logical dependencies between administrative elements; introduces the structure constraint graph as explicit constraint conditions to perform structure-aware joint reasoning and consistency constraint optimization on administrative elements, suppressing element combinations that do not conform to administrative semantic logic, and outputting structurally consistent administrative text element extraction results; this invention can effectively improve the logical consistency, completeness, and business usability of administrative text element extraction results, and is applicable to application scenarios such as structured processing of administrative documents, government information management, and intelligent auxiliary decision-making.

The present application relates to artificial intelligence, deep learning, financial technology, time series prediction technology field, specifically refers to a kind of financial time series prediction method and system of frequency domain enhancement and morphology embedding, comprising: first, obtain stock market daily line level opening price, highest price, lowest price, closing price, transaction volume multidimensional K line data and do moving average smoothing;Again, reorder column dimension, extract K line morphology features by multilayer one-dimensional convolution and project into high-dimensional vector;In the training phase, the data is enhanced in the frequency domain, and only the high-frequency component is disturbed;The features are input into the iTransformer encoder to extract the time series features;Finally, the real prediction value is restored by adaptive inverse normalization.The present application realizes high-precision prediction of stock price by morphology embedding, frequency domain fine enhancement, adaptive inverse normalization and iTransformer modeling, eliminates the numerical cliff effect, improves the trend following and inflection point capturing ability, and enhances the overall robustness of the algorithm.

This application discloses a method, apparatus, and device for quantitative pressure reduction control of an airbag, relating to the field of medical device technology. This solution pre-constructs a dataset containing minimum PWM values ​​for multiple solenoid valves reducing the airbag pressure from maximum to minimum within a preset pressure reduction time, serving as a benchmark to overcome individual differences. During pressure reduction, the target solenoid valve is controlled based on the current PWM value, and the current airbag pressure is monitored to determine if it is not greater than the target pressure value. If so, the correlation between the current PWM value and the initial and target pressure values ​​is recorded; otherwise, the PWM step value is determined based on the aforementioned dataset to dynamically update the drive parameters. This solution utilizes a unified benchmark calibration value to eliminate the differences in mechanical characteristics between different solenoid valves. Combined with real-time fine-tuning based on pressure feedback, it eliminates the need to pre-configure a large number of parameters for each pressure point, simplifying the parameter configuration process and effectively reducing quantitative control errors.

The application discloses a feeding machine for garment processing and relates to the technical field of garment processing equipment, which comprises a rack, a mounting bin and a power bin. The top of the rack is provided with a conveying part, a deviation rectifying part and a synchronous part. The conveying part is used for feeding and straightening cloth. The deviation rectifying part is used for flattening and tensioning the cloth. The synchronous part is used for position fine adjustment of the two ends of a cloth roll core shaft. The synchronous part is synchronously and parallelly adjusted with the deviation rectifying part, so that the deviation of the cloth roll is prevented from being aggravated due to different tensions on the two sides of the cloth while the deviation rectifying effect is ensured. The cloth flattening mechanism is provided with annular rubber strips and symmetrical arc-shaped rubber strips, so that the cloth is evenly spread on both sides in a wave-shaped manner. The problems of cloth wrinkling and stacking are solved. The spread cloth is pulled at the same time by cooperating with a cloth pushing and pulling mechanism, so that the stability of feeding is further improved.

The utility model relates to optical communication device technical field, concretely relates to a filter. The filter includes double fiber subassembly, diffraction element, lens, microcomputer subassembly and light splitting subassembly, diffraction element is located on the incident light path of light input end, is used for diffraction formation different wavelength light beam with the light output of light input end, the lens is located on the emergent light path of diffraction element, to focus the light of multiple different wavelengths that diffraction element output, microcomputer subassembly includes a plurality of reflecting mirrors, a plurality of reflecting mirrors are used for reflecting different wavelength light, light splitting subassembly sets up on the light path between light output end and diffraction element, light splitting subassembly is used for the light that is reflected back by a plurality of reflecting mirrors and carries out light splitting, a part of light is reflected back diffraction element and arrives at the place that reflecting mirror is equipped with detection layer, and reflecting mirror can adjust the reflection angle of itself according to the detection signal of detection layer. The filter can automatically track compensation according to the light attenuation change, guarantees the stable output of channel power.