35results about How to "Requires low accuracy" patented technology

Geophysical measurement system employed during the drilling of a well borehole. The system employs a reference clock disposed within equipment at the surface of the earth and a borehole assembly which houses a downhole clock and at least one sensor. The borehole assembly is operationally connected to a drill string, which advances the borehole. At least one synchronization shuttle apparatus containing a shuttle clock is conveyed downhole to the borehole assembly to synchronize the borehole clock with the reference clock. Reference and borehole clock synchronization is maintained at one millisecond or less over a period of days. Outputs from the reference clock and borehole clock and sensor are combined to obtain a measure of a geophysical parameter of interest. Although the measurement system is particularly applicable to seismic-while-drilling measurements, it can be used in a wide variety of clock driven geophysical measurements.

The invention discloses a resonant frequency tracking circuit. The resonant frequency tracking circuit comprises a current switch for converting direct voltage inputted by a power supply into a high-frequency pulse current; an LC resonant circuit connected to an output end of the current switch and used for converting electric energy into electromagnetic energy and then transmitting the electromagnetic energy to a wireless charger; a detection inductor connected to the ground at an end and used for obtaining frequency and phase information of the LC resonant circuit; and a phase locked loop circuit connected to the other end of the detection inductor and used for correcting the frequency and phase information and then outputting the frequency and phase information to the current switch as a feedback signal so as to control pulse current frequency outputted by the current switch. According to the invention, the inductive wireless charger LC resonant frequency automatic tracking device reduces the required accuracy of LC parameters from 1% to 10%, and therefore production costs are reduced, device screening time is saved and production efficiency is improved.

The present invention discloses a package method of the inkjet-printhead chip and its structure. The structure includes: a nozzle structure of a print element including an ink chamber layer and a nozzle layer on the ink chamber layer, wherein a plurality of nozzle through holes are set in the nozzle layer and pass through an ink chamber of the ink chamber layer; a flexible substrate set on the nozzle layer, wherein there is at least an opening set in the flexible substrate to expose those nozzle through holes; and a chip set under the ink chamber layer. Besides, the present package method is to utilize the micro-manufacturing process to form the nozzle structure of a print element and the tape automatic bonding process to bond the flexible substrate on the nozzle layer and the chip under the ink chamber layer.

The present invention especially indicates a complete fluidic sprinkler of the special-shaped nozzle. The invention is composed of four components of rotary a sealing device, a flow passage, a reversing mechanism and a special-shaped fluidic element. The nozzle is non-circular and the groove which lies on the I side of the signal nozzle on the nozzle is arc-shaped, rectangular or triangular. During operation the water current passes through the rotary sealing device and the flow passage and is ejected from the special-shaped fluidic element. When the water current passes the nozzle of the special-shaped fluidic element the water current at the groove enters the signal nozzle I and causes that the clearance C of the right cavity of the element is smaller and smaller and is blocked finally, the pressure difference between the left and right cavity push the power stream to the right, a wall is generated and the whole element rotates to the right. At the condition of wall the signal nozzle I comes away from the power stream and only the air can be obtained as the bending of the power stream. The air is sent from the reverse connection mouth to the signal nozzle II and adds air to the right cavity, finally the pressure difference between the left cavity and the right cavity disappears, the perpendicular incidence condition gets back and the rotation of the nozzle to the right side stops. The whole showerhead has the advantages of simple structure, low price, stable working and good atomizing performance.

A novel receive timing manager is presented. The preferred embodiment of the present invention comprises an edge detection logic to detect the data transition points, a plurality of data flip-flops for storing data at different sample points, and a multiplexer to select the ideal sample point based on the transition points found. A sample window is made with multiple samples. The sample window size can be designed smaller or greater than the system clock period based on the data transfer speed and accuracy requirement.

The invention provides a preparation method of an array substrate, the array substrate, a display panel and a display device, belongs to the technical field of display, and can solve problems of complex technology and relatively high cost due to respective patterning of a light blocking layer and an active layer of the array substrate in the prior art. According to the preparation method of the array substrate, the array substrate, the display panel and the display device, the light blocking layer and the active layer of the array substrate are patterned by adopting the same mask plate so that the number of the mask plate is saved, one step of patterning technology is saved and cost is reduced. Meanwhile, an alignment problem in the process of the patterning technology does not need to be considered so that the equipment requirement and control precision can be reduced.

A resistor string digital to analog converter formed of polysilicon resistor segments to each of which is applied an electric field. The approach improves the overall accuracy.

The invention relates to a forklift bracket cooperatively used with a forklift. The forklift bracket comprises a bracket body, wherein the bracket body comprises a supporting frame and a bottom frame which are separately arranged vertically; a fork arm groove for allowing a fork arm of the forklift to be inserted in from rear to front is formed in the bottom frame; a weighing mechanism is arranged between the bottom frame and the supporting frame; a display window used for displaying the weight readout of the weighing mechanism is arranged on the side surface of the bottom frame or the supporting frame. The forklift bracket cooperatively used with the forklift, provided by the invention, has a weighing function.

The invention discloses a rubber waterstop and foam board fixing device for box culvert continuous placement and a using method thereof. The fixing device involves a rubber waterstop, foam boards, steel bar supports, bolts and mortar cushion blocks, the rubber waterstop is of a rectangular sheet-shaped structure, anti-skid protrusions are arranged on the two faces of the rubber waterstop, each steel bar support comprises a waterstop fixing rib, a foam board fixing rib, a rubber water-stopping anti-skid distribution rib, a connecting rib, a steel plate with a hole and an inclined supporting ribwhich are welded together to play a role of a fixing support, the bolts comprise screw rods and nuts and play a role in connecting the steel bar supports on the two sides of the waterstop to clamp and position the waterstop, and the mortar cushion blocks are trapezoidal mortar cushion blocks, are bound on the foam board fixing ribs and cooperate with the supports to play a role in fixing the foamboards. The fixing device has the advantages that the fixing problem of the rubber waterstop and the foam boards during box culvert continuous placement is solved, moreover, the structure is simple,fixing and connecting are convenient, on-site machining is facilitated.

The invention relates to a forklift bracket which comprises a bracket body forked up from back to front by a fork arm, the bracket body is sequentially provided with at least two support rollers in the front and back direction, the rotating axes of the two support rollers extend in the left and right direction, a front baffle plate whose rotating axis extends in the left and right direction is hinged to the front side of the support roller on the bracket body, the front baffle plate is provided with a first working station and a second working station in the rotating process, the first working station turns to the erecting position to be matched with the front end of a corresponding object in a limited manner, and the second working position turns to the turnover position to keep off the object. The forklift bracket solves the problem that the object is easily separated from the front side of the fork arm in the transport process.

The invention discloses a strip winding drum. The strip winding drum comprises a main shaft, the left end face of the main shaft is rotationally connected with a rotating connector, the right end face of the main shaft is connected with a head supporting piece, the left portion of the main shaft is connected with a gear assembly, and the right portion of the main shaft is connected with a fan-shaped plate and a radial inclined wedge through a fan-shaped plate connecting assembly and a wedge connecting assembly; and protection blocks are arranged at the two ends of the fan-shaped plate, a guide key is arranged between the main shaft and the fan-shaped plate, and a radial oil cylinder is arranged between the main shaft and the radial inclined wedge. According to the strip winding drum, the overall structure is compact, the number of conventional quick-wear parts is small, safety and reliability are achieved, assembling is easy, the production cycle is shortened to a great extent, and the maintenance and manufacturing cost is reduced to a great extent.

The invention discloses a door type bucket-wheel stacker-reclaimer. The door type bucket-wheel stacker-reclaimer comprises a rotary door frame part, a bucket-wheel reclaiming part, a conveying part and a centered rotating mechanism, wherein the rotary door frame part rotates around the centered rotating mechanism with the span of the rotary door frame part as the radius, and the bucket-wheel reclaiming part and the conveying part are connected to the rotary door frame part. The conveying part is composed of a plurality of belt conveyers and forms a reclaiming logistics channel and / or a stacking logistics channel with the bucket-wheel reclaiming part. Different from existing equipment, the stacker-reclaimer can be applied to a round stock yard innovatively with the span of a door frame as the actual working range radius.

The invention discloses a round stockyard stacking and fetching machine which comprises a rotating portal portion, a bucket wheel fetching portion, a conveying portion and a centering swinging mechanism. The rotating portal portion rotates around the centering swinging mechanism by taking span of the rotating portal portion as a radius, the bucket wheel fetching portion and the conveying portion are connected with the rotating portal portion, and the conveying portion is composed of multiple belt conveyors and cooperates with the bucket wheel fetching portion to form a fetching logistics channel and / or a stacking logistics channel. Different from existing equipment, the round stockyard stacking and fetching machine takes the span of a portal as actual working range radius, and application of the stacking and fetching machine in a round stockyard is realized for the first time.

The invention discloses a resonant frequency tracking circuit. The resonant frequency tracking circuit comprises a current switch for converting direct voltage inputted by a power supply into a high-frequency pulse current; an LC resonant circuit connected to an output end of the current switch and used for converting electric energy into electromagnetic energy and then transmitting the electromagnetic energy to a wireless charger; a detection inductor connected to the ground at an end and used for obtaining frequency and phase information of the LC resonant circuit; and a phase locked loop circuit connected to the other end of the detection inductor and used for correcting the frequency and phase information and then outputting the frequency and phase information to the current switch as a feedback signal so as to control pulse current frequency outputted by the current switch. According to the invention, the inductive wireless charger LC resonant frequency automatic tracking device reduces the required accuracy of LC parameters from 1% to 10%, and therefore production costs are reduced, device screening time is saved and production efficiency is improved.

The invention relates to a multi-flow control valve, a chassis supporting leg hydraulic control system and a crane. The multi-flow control valve comprises a valve body and at least one switching value control valve, the valve body comprises a valve body oil inlet and at least two valve body work oil openings corresponding to loads of different flow demands, an oil inlet of the at least one switching value control valve is communicated with the valve body oil inlet, a work oil opening of the at least one switching value control valve is communicated with the at least two valve body work oil openings of the valve body, at least two work oil channels corresponding to the loads of the different flow demands are formed, and a throttling opening with the drift diameter corresponding to the flow demands is formed in each work oil channel. Compared with an exiting control mode of a proportional directional valve, due to the fact that the flow is mainly determined by the throttling openings of the valve body, the requirement for the precision of the switching value control valve is low, cost is low, the sensitiveness of the switching value control valve to oil pollution is low, the pollution resisting capacity is high, and therefore higher reliability is achieved.

The invention discloses a method for controlling droplet impact shape, contact time and controllable splitting of droplet, comprising the following steps: step 1, template design; step 2, template fabrication; step 3, template surface treatment; step 4, liquid Droplet impact; step five, observation and analysis of impact morphology and dynamics. By changing the shape, size, number, position of obstacles on the template, and the impact position of the droplet, various impact dynamics can be obtained, and the boundary between spreading and retraction can be broken, so that the spreading and Retraction coexists, and by controlling the impact dynamics of different forms, the goals of reducing contact time, variable and controllable single droplet impact forms, and controllable splitting during droplet impact are achieved. The method is simple to operate, low in cost and good in effect, and can be applied to fields such as self-cleaning, printing, open microfluidics, food and drug subpackaging and transmission.

A novel receive timing manager is presented. The preferred embodiment of the present invention comprises an edge detection logic to detect the data transition points, a plurality of data flip-flops for storing data at different sample points, and a multiplexer to select the ideal sample point based on the transition points found. A sample window is made with multiple samples. The sample window size can be designed smaller or greater than the system clock period based on the data transfer speed and accuracy requirement.

The invention discloses an LC resonant frequency search circuit, which includes an output of an amplitude modulation detector connected to a data acquisition and recording circuit, an output of the data acquisition and recording circuit connected to a comparison, judgment and control circuit, and the output of the comparison, judgment and control circuit is simultaneously connected Programmable frequency synthesizer, data acquisition and recording circuits. The output of the programmable frequency synthesizer is connected to the gate driver, the output of the gate driver is connected to the current switch, the output of the current switch is connected to one end of the resonant capacitor, and the other end of the resonant capacitor is connected to one end of the resonant inductor and the input of the AM detector, the resonant inductor The other end is connected to the current switch. The resonant inductor is coupled with the inductor through the space electromagnetic field, and the coupled inductor is connected to the equivalent impedance. The device enables the production of the resonant LC drive circuit for electromagnetic induction energy transmission to realize the non-adjustment of L and C parameters, the energy conversion efficiency is always at the highest state, and can reduce its variation with temperature.

A novel receive timing manager is presented. The preferred embodiment of the present invention comprises an edge detection logic to detect the data transition points, a plurality of data flip-flops for storing data at different sample points, and a multiplexer to select the ideal sample point based on the transition points found. A sample window is made with multiple samples. The sample window size can be designed smaller or greater than the system clock period based on the data transfer speed and accuracy requirement.