35results about How to "Meet the need for speed" patented technology

The invention discloses a non-contact frequency domain electrical method real-time advanced detection system and method for shield carrying. Non-contact electrodes are installed on a cutterhead of a shield machine, currents are emitted and received by means of capacitance coupling, the non-contact electrodes are connected to a host through a plurality of paths of swivel joints, measurement data is inverted and explained in real time, a prediction result is transmitted to a shield machine control system, and technical support is provided for safe construction of the shield machine. According to the invention, the Non-contact electrodes are installed on the shield machine cutterhead, the problem of difficult coupling of conventional contact electrodes is avoided; the real-time advanced detection of the geology in front of a tunnel face is realized in a shield driving process without the downtime of the shield machine, the rapid requirement of shield construction is met, and the efficiency of advanced geology detection of the shield machine is substantially improved; the electrodes are only installed on the cutterhead, the interference of back metal objects is effectively avoided, the forward advanced detection capability is improved, and more important, the problem that the spaces of the cutterhead and the tunnel face are very narrow is solved.

The invention discloses non-interrupted linear-speed packet transmitting and receiving methods and equipment based on LINUX, and belongs to the technical field of data packet transmitting and receiving in LINUX systems. The packet receiving method comprises the steps that an application program carries a serial number of at least one free buffer block to trigger an inner core module and a network card to perform data packet exchange; the inner core module exchanges the serial numbers of the free buffer blocks with a serial number of at least one stored data packet buffer block received in the network card, and configures physical addresses of the free buffer blocks to the network card; and the application program processes data according to the serial numbers returned by the inner core module. Therefore, the network card stores data packets into the buffer blocks which can be accessed by the application program during packet receiving; the data packets are transmitted by the physical addresses of the data packet buffer blocks filled by the application program during packet transmitting; data copy is not required during packet transmitting and receiving courses; and the transmitting and receiving performance of the data packets is improved. In addition, non-interrupted circulating active packet transmitting and receiving are adopted, so that calling of a CPU (Central Processing Unit) resource during packet transmitting and receiving interruption is avoided, and the packet transmitting and receiving performance is further improved.

The invention discloses a fast tracking method and device for ultrasonic resonance frequency, comprising: real-time detection of the inductance voltage in the matching circuit and the output voltage output to the load of the transducer, and performing linear calculation on the detected inductance voltage and the output voltage; And generate a frequency adjustment amount according to the linear operation result and the initial operating frequency, and use the frequency adjustment amount to control the output frequency of the ultrasonic power converter to track and adjust the initial operating frequency. The invention performs closed-loop control on the frequency of the ultrasonic system by detecting the inductance voltage and the output voltage, and realizes fast tracking and adjustment of the resonance frequency point of the system through the voltage calculation results. The required hardware circuit is simple, the software algorithm is simple and efficient, and can quickly respond to the frequency of the load. Change and real-time tracking of the resonance frequency of the ultrasonic power system for adjustment.

A routing acceleration system and method based on Linux architecture for CPE equipment, related to the field of CPE equipment, when the routing acceleration system is loaded for the first time, the existing routing information and interface information in the Linux protocol stack are read, and the routing information is written into the adaptation In the FIB table of the adaptation layer, the interface information is written into the LINK table of the adaptation layer, and the mapping of the two tables is established through the index; the kernel information is converted into the entry information of the FIB table, and synchronized to the FIB table of the adaptation layer and / or In the LINK table, maintain the FIB table and / or LINK table through the hook processing unit, learning event unit, device status unit and update aging unit, and realize routing and forwarding according to the FIB table and / or LINK table. The invention establishes and maintains the FIB table and the LINK table at the adaptation layer, realizes the forwarding of routing data through the FIB table and the LINK table, reduces the burden of CPE equipment, and improves the routing forwarding speed.

High-power tractor continuously variable transmission, including: gearbox front box, middle box, rear box, first partition, second partition, third partition, hydraulic-mechanical double-flow transmission device and fixed-axis variable-speed transmission device , forward transmission device and reverse transmission device, four-wheel drive transmission device, power output device; the front box, middle box and rear box of the gearbox are arranged in sequence, and the front box and middle box of the gearbox pass through the first partition Bolts are connected, the rear box and the middle box are connected by bolts, the second partition and the third partition are respectively installed in the middle box and the rear box by bolts, and six component installation cavities are formed in the gearbox box ; The front end of the hydraulic-mechanical double-flow transmission device extends out of the front box to connect with the tractor engine, the rear end of the fixed-axis transmission device extends out of the rear box to connect with the input end of the rear axle, and the rear end of the power output device extends out of the rear box to connect with the power output shaft The input end is connected, and the front end of the four-wheel drive transmission device extends out of the rear box to connect with the front axle of the tractor.

A high-precision fast positioning method based on the TOA mode in a non-line-of-sight environment. The basic positioning equation between the mobile station and each base station is obtained according to the distance observation value; the basic positioning equation between the mobile station and the base station corresponding to the minimum distance observation value is selected. The positioning equation is used as the reference equation, and the basic positioning equation between other mobile stations and the base station is subtracted from the reference equation to obtain the standard form of least squares; the expression form of the L1 norm is constructed and converted into an expression of the L1 norm with additional linear constraints form; give the iterative process of the alternative direction method to obtain the positioning solution of the mobile station; bring the positioning solution into the L1 norm expression to obtain the absolute value residual, if the maximum absolute value residual and the absolute value residual If the median ratio is greater than the preset value, the positioning solution of the mobile station is output; otherwise, the basic positioning equation between the mobile station and the base station corresponding to the next distance observation value is used as the reference equation. The invention can reduce the influence of the non-line-of-sight error on the positioning accuracy.