96results about How to "Achieve offset" patented technology

Disclosed is a method for canceling a near-zone reflection self-interference signal, including: converting an input radio-frequency interference reference signal into a digital baseband reference signal or digital intermediate-frequency reference signal; converting a radio-frequency output signal after near-zone reflection self-interference cancellation into a baseband or intermediate-frequency signal as an error signal; subjecting the digital baseband reference signal or digital intermediate-frequency reference signal and the error signal to an adaptive filtering operation to form a reconstructed baseband or intermediate-frequency signal of a near-zone reflection self-interference signal component; converting the reconstructed baseband or intermediate-frequency signal of the near-zone reflection self-interference signal component into a near-zone reflection self-interference radio-frequency reconstructed signal; and subtracting the near-zone reflection self-interference radio-frequency reconstructed signal from a pre-acquired radio-frequency signal to form a radio-frequency output signal after near-zone reflection self-interference component cancellation. Also disclosed is a device for canceling a near-zone reflection self-interference signal. The embodiments of the present invention simply and effectively realize cancellation of a near-zone reflection self-interference component.

The invention discloses an internal transaction business identification and offsetting method and system. The method comprises the steps: (S1) defining the hierarchy division of both parties of a transaction event; (S2) establishing a characteristic rule base for internal transaction events by combining the hierarchy division; (S3) when an internal transaction business occurs, filling information into certificate entry assisting information; (4) screening an internal transaction event through the certificate entry assisting information, and associating the internal transaction event with the characteristic rule base; (5) determining a data offset range, and realizing the offsetting of the internal transaction event through joint analysis on the characteristic rule base and the data offset range. According to the method and the system, the characteristic rule base for the internal transaction events is established, the information is filled in the certificate entry assisting information when the internal transaction business occurs, the internal transaction event is extracted according to the certificate entry assisting information and the characteristic rule base, and the data offset range is determined, so that the offsetting of the internal transaction event is realized.

The invention provides a dynamic power flow control device of a controllable transformer. The dynamic power flow control device is composed of the controllable transformer, a power unit, a measurement and control module, a bypass switch, an input voltage transformer, an output voltage transformer and an output current transformer. The dynamic power flow control method comprises the following steps of: controlling the ON and OFF of a subconnector at an input side (original edge) of the controllable transformer by using a quickly powered-on / off electronic power switch; injecting a duple-frequency signal in a pulse-width modulation signal of the electronic power switch of the controllable transformer by using a DC (Direct Current) signal; and changing the phase position and the amplitude of output voltage of the controllable transformer through changing the amplitude of the DC signal in the pulse-width modulation signal as well as the amplitude and the initial phase position of the duple-frequency signal so as to realize the adjustment of active power and reactive power. In the invention, as the conduction of the subconnector of the controllable transformer is controlled, the dynamicpower flow of a power network is adjusted and controlled; and the dynamic power flow control device has the characteristics of low cost and high reliability for the control of dynamic power flow.

The invention discloses a crowd gathering sensitive image detection method, which comprises the following steps: collecting image data in the gathering crowd, respectively obtaining image data sets ofthe original domain and the target domain; establishing a supervised discriminant sparse transfer model, which can learn the common subspace and the sparse representation matrix of the original domain and the target domain simultaneously, and adding a supervised discriminant regular term to the transfer model; obtaining the common subspace of the classification task in the original domain and thetarget domain by using the label information of the image samples, and implementing the optimization process by transfer learning in the common subspace; using the alternating optimization strategy and ADMM algorithm to solve the optimization variables alternately; recognizing sensitive images. A supervise discrimination sparse migration model is established to improve that correct rate of classification task under the condition of small sample, thereby greatly improving the correct rate and discrimination of sensitive image recognition in complex environment such as crowd gathering and thelike.

The elastic boring bar includes a bar body and a cutter bar with boring cutter connected to the bar body. The bar body consists of a cylindrical elastic deformation body with longitudinal grooves andhorizontal grooves, a cylindrical connection sleeve inside the elastic deformation body and is fixed and connected to the back section of the elastic deformation body coaxially, a push bar with top end fixed and connected to the front section of the elastic deformation body, a drawing bar below the push bar and a steel ball inside the hole in the lower end of the push bar. The cutter bar has an end connected to the front section of the elastic deformation body. The boring bar can be used to perform minute quantity compensation of cutter(s).

The invention discloses a fuel giving machine active search type aerial refueling auxiliary device for aircrafts. The fuel giving machine active search type aerial refueling auxiliary device comprises a double-layer fuel giving hose, a fuel giving machine taper sleeve, a triangular turbulence device, a camera device, a control desk and a circuit control module. The double-layer fuel giving hose comprises an outer-layer protective sleeve and an inner-layer fuel delivery pipe, the fuel giving machine taper sleeve comprises a taper shank and an umbrella sleeve which are fixedly connected with each other, the camera device is arranged on the taper shank on the inner side of the umbrella sleeve, an axial fuel giving hole is formed in the middle of the taper shank, the outer-layer protective sleeve is connected with an outer ring of the taper shank, the inner-layer fuel delivery pipe is connected with the fuel giving hole in the middle of the taper shank, and electric flexible flat cables are arranged between the outer-layer protective sleeve and the inner-layer fuel delivery pipe and are connected with the camera device on the taper shank and electric push rods in the triangular turbulence device. The fuel giving machine active search type aerial refueling auxiliary device has the advantages that the fuel giving machine active search type aerial refueling auxiliary device is controlled by fuel giving machine operators in an active search mode, accordingly, the aerial refueling butting time can be shortened, and aerial refueling flight requirement difficulty can be lowered.

The invention discloses a dynamic power flow control device with a wave trap for a controllable transformer. The dynamic power flow control device consists of the controllable transformer, a power unit, a measurement and control module, a bypass switch, the wave trap, an input voltage transformer, an output voltage transformer and an output current transformer. In a dynamic power flow control method, a power electronic switch rapidly switched on and switched off controls the on-off of a tapping point of an output side / secondary side of the controllable transformer; a direct current signal is injected into a frequency-doubled or frequency-multiplied signal in a pulse width modulation signal, and the amplitude of the direct current signal and the amplitude and initial phase of the frequency-doubled or frequency-multiplied signal are changed, thereby changing the phase and amplitude of output voltage of the controllable transformer and realizing the regulation of active power and reactive power; and the wave trap filters triple frequency harmonics or odd harmonics, corresponding to frequency multiplication modulation, of the output voltage of a dynamic power flow controller of the controllable transformer to avoid the distortion of the output voltage. The device and the method have the characteristics of low cost and high dynamic power flow control reliability.

The invention discloses a charging device for a new energy vehicle. The charging device for the new energy vehicle comprises a box body; a mounting cavity is formed in the box body; a charging power supply is arranged in the mounting cavity; a moving mechanism is connected between the charging power supply and the internal side wall of the mounting cavity; a first communication groove communicating with the mounting cavity is arranged in the side wall of the box body in a through manner; two sliding cavities which are arranged with one under the other one are symmetrically formed in the box body; the first communication groove is formed between the two sliding cavities; communication holes communicating with the sliding cavities are formed in the internal side walls of the upper and lowerends of first communication groove in a through manner; and two strip-shaped grooves communicating with the sliding cavities are formed in the internal side walls of the mounting cavities in a throughmanner. According to the charging device for the new energy vehicle, the structural design is reasonable; a user can be prevented from manually connecting a charging gun with the charging power supply; potential safety hazards are reduced; and moreover, stable connection between the charging gun and the charging power supply can be guaranteed; easy falling of the charging gun can be avoided; andnormal charging working can be guaranteed.

The invention discloses an automatic punching and carving-milling all-in-one machine which saves manpower and labor hours and is high in efficiency. The automatic punching and carving-milling all-in-one machine comprises an automatic control device and an operation platform. A carrier, a punching mechanism, a material transfer mechanism and a carving-milling mechanism are arranged on the operation platform. The carrier is connected with a front-back movement mechanism through a connecting plate. The automatic punching and carving-milling all-in-one machine is high in universality and suitable for different materials; a material is automatically fed to the station of the punching mechanism through the carrier, and a material head of the material is shorn; after shearing is finished, the material is automatically fed to the carving-milling station through the material transfer mechanism to be carved and milled; after carving and milling are completed, the finished material is automatically put into a finished product bin through a collection mechanism; and according to the machine, a large amount of manpower is reduced, the work efficiency is improved, and quality is stable.

The invention discloses stainless steel pipe cutting equipment. The stainless steel pipe cutting equipment comprises a transporting and fixing mechanism, an overturning mechanism, a movable adjusting mechanism, a cutting mechanism and a drilling and polishing mechanism, wherein the transporting and fixing mechanism comprises a bottom plate, a sliding plate, a supporting rod and a pressing air cylinder, wherein the overturning mechanism is used for overturning a steel pipe, the movable adjusting mechanism is fixedly installed on the upper end face of the bottom plate, the cutting mechanism is fixedly mounted on the movable adjusting mechanism, and the cutting angle and direction are adjusted through coordinated work of the movable adjusting mechanism and the cutting mechanism. According to the stainless steel pipe cutting equipment, the height of a top connecting plate can be adjusted through stretching and retracting of a pushing rod, an electric motor B drives a gear B, and the gear B drives a rack B, so that front-back movement of a driving motor is achieved, the driving motor drives a workpiece sleeve to rotate, and punching accessories or grinding accessories can be installed on the workpiece sleeve for work, therefore, the punching and polishing functions are achieved.

The invention relates to a dynamic power flow control device for a multi-frequency modulation based controllable transformer. The dynamic power flow control device is composed of a controllable transformer, a power unit, a measuring and controlling module, a bypass switch, an input voltage transformer, an output voltage transformer and an output current transformer. A dynamic power flow control method comprises the following steps of: utilizing a quick turn-on / off electronic power switch to control the turn-on / off of a tap joint at an output side (secondary edge) of the controllable transformer; in a pulse width modulation signal, adopting a direct current signal to inject a multi-frequency (two or more frequencies) signal; and changing a phase and amplitude of an output voltage of the controllable transformer by changing the amplitude of the direct current signal as well as the amplitude and initial phase of the multi-frequency signal in the pulse width modulation signal, thereby realizing the adjustment for active power and reactive power. The turn-on of the tap joint of the controllable transformer is controlled and a harmonic wave of the multi-frequency modulation is reduced, thereby realizing the adjustment and control for the dynamic power flow of a power grid. The dynamic power flow control device and method have the characteristics of small harmonic wave, low cost and high control reliability.

The invention relates to the technical field of wood pallet production, in particular to a full-automatic wood pallet production device which comprises a base, a pressing device and a nailing protection mechanism. A nailing working table is arranged on the base; a nailing rack moving in a reciprocating way along the length direction of the nailing working table is arranged on the nailing working table; and a nailing gun is arranged on the nailing rack. The full-automatic wood pallet production device is less in worker physical power consumption, less in occupied area and high in production efficiency; the damage on the nailing gun and the device through the setback force of the nailing gun after nailing is effectively buffered, the device vibration is reduced, the position of a wood boardis stable, the accuracy of a nailing position is effectively ensured, meanwhile, the depth is uniform after nailing, the occurrence of the phenomenon that a nailing gun nozzle contacts the wood boardso as to be damaged is prevented, the service life is prolonged, the full-automatic wood pallet production device is suitable for fixing wood boards and wood piers in different widths, and the formingquality of a wood pallet is effectively ensured.

The invention relates to the technical field of cosmetics, and discloses automatic filling equipment for glue liquid cosmetic production. A dropper is movably connected below a connecting pipe; an airbag is movably connected to the front end of the upper part of a main body; and a pressing wheel is movably connected to the outer side of the air bag. According to the automatic filling equipment for glue liquid cosmetic production, a driving rod rotates to drive a metal block to get close to the middle, and the metal block and a round rod part connected with the metal block also move along withthe metal block; when the round rod part gets close to the end close to a metal part and the air bag abuts against a protective shell, an induction switch in the protective shell is started, and a limiting opening is moved outwards from the interior of a pushing piece, so that the pushing piece acts on a pressing rod; and the pressing rod and the metal part are used in cooperation, so that the device has a suction force, an effect on preventing liquid leakage is achieved. The environmental protection performance and the safety of the equipment are guaranteed, and the problem that the equipment or the ground is prone to being wetted is solved.

The invention relates to a permanent magnet auxiliary synchronous reluctance type motor rotor structure. A rotor core is provided with a plurality of U-shaped grooves, wherein the inner layer and theouter layer of each U-shaped groove are correspondingly arranged; each inner-layer U-shaped groove is divided into two L-shaped grooves through a reinforcing rib; every two outer-layer U-shaped grooves form a group and are arranged corresponding to one inner-layer U-shaped groove to form a magnetic space; and the inner U-shaped groove and the outer U-shaped groove are respectively provided with asecond permanent magnet and a first permanent magnet which are biased leftwards, so that the flux linkage of the rotor deviates, and the second permanent magnet of the inner U-shaped groove plays a role in magnetic conduction and corrects the deviation angle of the magnetic line of force passing through the first permanent magnet. The torque of the permanent magnet is improved, and the lengths andthe widths of the first permanent magnet and the second permanent magnet are the same, so that the utilization rate of the permanent magnets is increased, magnetic lines of force are gathered to theleft side, the offset of a rotor flux linkage is achieved, the reluctance torque is increased, and the material cost of the motor can be greatly reduced under the same torque requirement.

The invention provides a frequency compensation circuit for an operational amplifier. The frequency compensation circuit comprises a gain circuit, an output circuit and a tail current source bootstrap circuit of the gain circuit, wherein a grounding end of the gain circuit is connected with a first end and a second end of the tail current source bootstrap circuit; an output end of the gain circuit is connected with a first input end of the output circuit and an input end of the tail current source bootstrap circuit respectively; an output end of the tail current source bootstrap circuit is connected a bias voltage, and connected with a second input end of the output circuit through a first resistor; and the second input end of the output circuit is connected with the output end of the gain circuit through a first capacitor. Based on an RC network consisting of the first resistor and the first capacitor, the operational amplifier generates a left-half plane null point z, and the left-half plane null point z and a first non-main pole of the operational amplifier can be counteracted by adjustment of the magnitude of the RC, so that frequency compensation of the operational amplifier is realized. Meanwhile, the unit gain bandwidth of the operational amplifier can be increased remarkably.

The invention belongs to the technical field of wireless communication, and discloses a channel estimation method of a full-duplex relay system based on a Chu sequence. The method comprises: using a non-blind estimation algorithm, using a Chu sequence and an OFDM symbol as sending data, after channel transmission, the received Chu sequence and the Chu sequence of a sending end being subjected to cross-correlation at a receiving end, and a cross-correlation value obtained by the received Chu sequence and the Chu sequence of the sending end being an impulse response estimation value of a channel; carrying out convolution on the estimated channel value and the Chu sequence of the sending end to obtain a value which is a reconstructed signal; and subtracting the received signal from the reconstructed signal, and performing self-interference elimination. The method starts from two aspects of theoretical simulation and USRP practical simulation, uses the Chu sequence as a training sequence to estimate the same-time same-frequency full duplex relay loop channel, generates a reconstructed signal according to the estimated self-interference channel information, and achieves the offset of the self-interference signal. The transmitting end and the receiving end perform transmission by using two USRPs, and the relay equipment performs simulation by using an amplification forwarding protocol.

The invention relates to a driving device, and particularly relates to a motor used for driving a liquid lens and a lens group. The motor comprises a base, a supporting frame, a carrier and a drivingassembly, the base is used for fixedly installing a first lens and the liquid lens which are distributed along an optical axis and are correspondingly arranged; the carrier can be movably arranged inthe base facing towards or away from the liquid lens; the driving assembly comprises a motor arranged on the carrier and a stator arranged on the base, the stator drives the rotor to move up and downalong the optical axis and / or move deflecting from the optical axis; the supporting frame is arranged close to the carrier and is movably connected with a moving plate of the liquid lens; the carriercan be in butt joint with the supporting frame; the rotor drives the carrier to move the driving supporting frame, the moving plate is driven to move by the supporting frame to adjust the curvature ofthe liquid lens, and restoring force is provided for the carrier to allow the carrier to return to an initial position when the moving plate restores to an initial state. The motor has the advantagesthat the components are less, the structure is simple, and the driving power consumption is low.

The invention belongs to the technical field of an electrical equipment tool and provides a multifunctional full-view-angle liquid crystal television wall with a bookshelf. A liquid crystal television shelf not only can rotate for 360 degrees in a horizontal direction, but also can realize an elevation function of a liquid crystal television; the liquid crystal television shelf also has a self-locking function, can be stopped at any position to reach a best watching effect, and is not influenced by an external force or gravity to change a watching view angle; limiting switches are additionally arranged at upper and lower limiting positions of a hoisting route so as to prevent the television from colliding the television wall, improve the safety and prevent error operation of children; two rooms can use one television by using the television wall so that the space utilization rate is improved and the decoration cost is saved; soundproof cotton is used at the inner part of the television wall and rubber cushions are arranged at contact parts between the bookshelf and a cabinet, so as to have a certain soundproof effect; and the upper and lower faces, and the side faces of the television wall are respectively connected with a ceiling, a floor and construction walls by expansion bolts, so that the safe stability of the television wall is guaranteed.

The invention discloses an output-side-switching-based dynamic power flow control device for a controllable transformer. The device consists of the controllable transformer, a power unit, a measurement and control module, a bypass switch, an input voltage transformer, an output voltage transformer and an output current transformer. In a dynamic power flow control method, the switching-on and switching-off of an output side / secondary tapping point of the controllable transformer are controlled by utilizing a fast switching-on / off power electronic switch, a frequency doubling signal is injectedinto a pulse width modulation signal of the power electronic switch of the controllable transformer by adopting a direct current signal, and the amplitude of the direct current signal and the amplitude and initial phase of the frequency doubling signal in the pulse width modulation signal are changed, thereby changing the phase and amplitude of output voltage of the controllable transformer and realize active power adjustment and passive power adjustment. The switching-on of the tapping point of the controllable transformer is controlled, thereby realizing adjustment control over the dynamic power flow of a power grid. The device and the method have the characteristics of low cost and high dynamic power flow control reliability.

The invention relates to a prestress jacquard guide needle. The prestress jacquard guide needle comprises a piezoelectric vibrator, a guide needle head, a lower positioning block and an upper positioning block, wherein the piezoelectric vibrator comprises an elastic base plate and four piezoelectric ceramics, the elastic base plate comprises a middle cantilever, a side cantilever and a cantilever connecting area, the piezoelectric ceramics are respectively distributed on the upper surface and the lower surface of the side cantilever, the guide needle head is bonded to one side of the cantilever connecting area, the piezoelectric vibrator is fixed by virtue of the upper positioning block and the lower positioning block, the piezoelectric vibrator has reciprocating curved deformation under the effect of the alternating-current voltage, the piezoelectric vibrator drives the guide needle head to move, the deviation of the entire guide needle head is realized, the needle head drives a yarn to move, the prestress jacquard guide needle is greater in deviation amount and greater in output force, and the service life of the jacquard guide needle can be effectively prolonged.

The invention relates to a driving device, and particularly relates to a motor and a lens group for driving a liquid lens. The motor comprises a base, a carrier, a drive assembly, and a first reset component. The drive assembly comprises a rotor disposed on the carrier, and a stator disposed on the base. The stator drives the rotor to move up and down along an optical axis and / or deflect around the optical axis. The first reset component is disposed on the liquid lens and abuts against the carrier when the carrier moves to provide a reset force for the carrier to return to an initial position.The rotor comprises a first set of coils and a second set of coils. The stator comprises a first set of magnets corresponding to the first set of coils and a second set of magnets corresponding to the second set of coils. A force deviating from the optical axis direction is generated when the first group of coils is energized, so that the carrier moves away from the optical axis direction. A force parallel to the optical axis is generated when the second set of coils is energized, so that the carrier moves in the optical axis direction. The first reset component is driven to move relative tothe liquid lens when the carrier moves, and curvature of the liquid lens is adjusted.

The invention relates to hydraulic excavating equipment, and in particular relates to a mineral offset adjusting excavator which is applicable to conveying on stope faces of coal mine wells and excavation and bottom cleaning of tunnels of air return ways, for solving the problems that in the prior art the working intensity is large, the production efficiency is low, the cleaning is not thorough, offset and walking of an excavation arm main body cannot be achieved, and the like. Walking devices are arranged on two sides and the front part of the base of the excavator, an offset adjusting device is arranged at the rear part of the base, and walking and offset of the excavation arm main body are achieved. The mineral offset adjusting excavator provided by the invention is compact in structure and small in appearance size and has the characteristics of energy conservation, low noise, small pollution, high efficiency, simplicity and convenience in operation, and the like as a full-hydraulic system is adopted for control, and offset and walking of the excavator main body are also achieved. Therefore, mechanical operation of the excavator in relatively soft rock tunnel bottom plates such as shale and batt in mine wells is achieved, and the excavation and bottom cleaning speed is greatly increased.

The invention discloses a dynamic power flow control device based on a wide-range controllable transformer including bidirectional thyristors. The dynamic power flow control device is formed by a controllable transformer, a power unit, a measuring and controlling module, a cross phase conversion module, a filter capacitor, an input / output voltage transformer and an output current transformer. The dynamic power flow control method is carried out in a way that an electronic power switch which can be turned on / off quickly is employed to control the turn-on / off of a tap joint at the output side (secondary side) of the wide-range controllable transformer, other two phases of windings are connected in series with each phase tap joint of the wide-range controllable transformer, at the same time, four bidirectional thyristors are added to change the conducting direction of the cross phase winding, and therefore the phase and amplitude of the output voltage of the controllable transformer can be changed in a maximum range, and active power and reactive power can be adjusted; because the conduction of the tap joints of the wide-range controllable transformer is controlled, the dynamic power flow of a power network can be adjusted and controlled. The dynamic power flow control method for the wide-range controllable transformer including the bidirectional thyristors is characterized by being low in cost and high in dynamic power flow control reliability.

The invention discloses a light spot changing mechanism and 3D printing equipment provided with the light spot changing mechanism. A base table is provided with a first optical lens set, a second optical lens set and an adjusting mechanism. The adjusting mechanism comprises a power device, a transmission device, a guide rail and an adjusting block arranged on the guide rail. The power device is connected with the transmission device. The transmission device is connected with the adjusting block. The adjusting block is connected with the first optical lens set, the power device drives the transmission device to drive the adjusting block to move along the guide rail, and accordingly the distance between the first optical lens set and the second optical lens set can be adjusted. The light spot changing mechanism and the 3D printing equipment provided with the light spot changing mechanism have the beneficial effects that the first optical lens set linearly moves front and back along the guide rail under the action of the power device and the transmission device, the distance between the first optical lens set and the second optical lens set is changed, focus point deviation is achieved, and accordingly the size changes of light spots projected into a scanning system are achieved.

The invention discloses a method for detecting the freshness of a fish body based on the fluorescence intensity of the fish body. The method includes: slaughtering the fish body and storing the fish body at room temperature; putting the stored fish body into an imaging darkroom and irradiating the fish body with ultraviolet rays; shooting a fish body fluorescence image by a camera; establishing adata model of the fish body color value changing with time and a data model of the fish freshness K value changing with time; taking a fish freshness K value as an abscissa; taking R, G and B color channel values, H, S and V color channel values and L, a and b color channel values as vertical coordinates of the three groups of regression models respectively; selecting a fish freshness K value corresponding to a time node and substituting the fish freshness K value into the three groups of regression models; respectively substituting the RGB color channel value, the HSV color channel value andthe Lab color channel value corresponding to the same time node into three groups of regression models used as a prediction model for rapid detection of fish freshness, and carrying out fish body freshness detection. The invention further discloses a device for detecting the freshness of the fish body on the basis of the fluorescence intensity of the fish body.

The invention provides a current blanking device of transformer iron core grounding current online monitoring equipment. The current blanking device comprises an iron core grounding current signal sampling conditioning module, a signal harmonic separation module, a separation signal phase shift module, a separation signal amplitude modulation and synthesis module, a current amplification output module, a signal frequency tracking module and a feedback control module. The invention further provides a current blanking method of the transformer iron core grounding current online monitoring equipment. According to the invention, the original current of an iron core grounding current monitoring device in operation can be offset and blanked; the calibrated iron core grounding current monitoring device can easily return to a zero current state; and the accuracy of a calibration process is improved.

The invention provides pipeline dredging equipment for sewage treatment, and relates to the field of household kitchens. The pipeline dredging equipment for sewage treatment comprises a walking device and is characterized in that a cavity is formed in the walking device, a rotating shaft is rotationally connected to the inner wall of the cavity, a protection box is fixedly connected to the middle of the rotating shaft, a driving motor is fixedly connected to the interior of the protection box, one end of the driving motor extends to be provided with a motor shaft, the output end of the motor shaft is fixedly connected with a rotating rod, the end, away from the driving motor, of the rotating rod penetrates through the protection box outwards, the end of the rotating rod is fixedly connected with a collecting box, an opening is formed in the right end of the walking device, a first electric telescopic rod is fixedly connected to the inner bottom wall of the opening, and a second reducing sleeve is arranged at the upper end of the first electric telescopic rod. Through the telescopic effect of the first electric telescopic rod, angle deviation of the rotating rod can be achieved, and the purpose of dredging at different heights is achieved.

The invention discloses a dye laser structure based on a guided mode resonance effect, which can realize output enhancement of near-infrared laser in a transmission direction. The structure is composed of upper and lower layers of independent, parallel and opposite guided-mode resonance gratings and organic dye, each of the upper and lower layers of guided-mode resonance gratings is composed of a surface grating, a thin-film waveguide layer, a low-refractive-index thin-film layer and a glass substrate, and the structure parameters are the same. An organic laser dye located between the two grating structures is dissolved in the polyurethane solvent. When no organic laser dye is added in the structure, transmission-type guided-mode resonance can be realized, and the resonance wavelength is equal to the pumping light wavelength or the emission light wavelength of the laser dye; after the organic laser dye is added, pump light enters the structure at a certain angle, when the pump energy is higher than the threshold working energy of the laser, the laser emits laser perpendicular to the surface of the glass substrate, and the emitted laser is enhanced in the transmission direction.

The invention discloses a mutual capacitance detecting circuit. The mutual capacitance detecting circuit comprises a current limiting transmitter module, a first capacitor and a receiving module. The current limiting transmitter module enables the first capacitor output alternatively positive and negative current under the control of clock signals; the receiving module comprises a current transmission module and an ADC (analog / digital converter) module, the ADC module comprises a second capacitor, a comparator and a counter, the current transmission module rectifies and transmits current output by the first capacitor to the first electrode plate of the second capacitor, and the voltage of the first electrode plate of the second capacitor reverses the output level of the comparator; the counter counts the width of the reversed level and outputs digital level pulse signals with a corresponding width. The mutual capacitance detecting circuit reduces the amplitude and the bandwidth of current signals through the current limiting transmitter module, reduces the requirements on an amplifier through current transmission, restrains the influence of common-mode noise, outputs a high signal to noise ratio under the condition of a low input signal to noise ratio and improves the detecting sensitivity.