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123 results about "Processor affinity" patented technology

Processor affinity, or CPU pinning or "cache affinity", enables the binding and unbinding of a process or a thread to a central processing unit (CPU) or a range of CPUs, so that the process or thread will execute only on the designated CPU or CPUs rather than any CPU. This can be viewed as a modification of the native central queue scheduling algorithm in a symmetric multiprocessing operating system. Each item in the queue has a tag indicating its kin processor. At the time of resource allocation, each task is allocated to its kin processor in preference to others.

Gatherer device of wireless ad-hoc network meter reading system, and operation method

A gatherer device of wireless ad-hoc network meter reading system comprises a processor unit, a 485 bus interface unit, a wireless transmitting-receiving unit, and a power supply managing unit; wherein the processor unit is responsible for operation and control of the whole device, the 485 bus interface unit is used for connecting one or multiple electric meters, the wireless transmitting-receiving unit is responsible for interacting data and commands with a concentrator of the wireless ad-hoc network meter reading system, and the power supply managing unit supplies power for the whole device. An operation method of the gatherer device comprises that a command is received by the wireless transmitting-receiving unit and transmitted to the processor unit for processing, that the processor unit sends a request frame to an electric meter, that the processor unit receives a response frame from the electric meter and analyzes the response frame to acquire information of electricity consumption, and that finally the information of electricity consumption is returned to the concentrator through the wireless transmitting-receiving unit. The device and the method in the invention solve problems that the prior micropower wireless communication meter reading manners have much channel interferences, and are relatively low in security, relatively short in communication distances and not well in penetrating capabilities. Furthermore, the device has the advantages of low cost, high cost performance, good instantaneity, safety and reliability, and use and maintenance conveniences.
Owner:NANJING TOP NODES SENSOR NETWORKS TECH +1

Intelligent traffic signal lamp control system

The invention discloses an intelligent traffic signal lamp control system which comprises a traffic flow signal collecting unit, a processor unit connected with the traffic flow signal collecting unit, a wireless sending and receiving module connected with the processor unit, a traffic signal lamp controller in long-distance wireless connection with the wireless sending and receiving module, a displayer connected with the traffic signal lamp controller, and a signal lamp driver used for driving the traffic signal lamp to be lighted. The traffic flow signal collecting unit comprises a microwave detector and a camera. The processor unit comprises an ARM microprocessor, a clock module and a Flash storage module, and the clock module and the Flash storage module are connected with the ARM microprocessor. The microwave detector, the camera and the wireless sending and receiving module are connected with the ARM microprocessor. The intelligent traffic signal lamp control system is simple in structure, reasonable in design, convenient to mount and implement, easy to use and operate, the displaying color and time of the traffic signal lamp can be adjusted automatically according to traffic flow information, practicability is strong, implementation cost is low, using effect is good, and popularization and application are convenient.
Owner:XIAN DAYU PHOTOELECTRIC TECH

Detection device and detection method for ferromagnetic abrasive grains in liquid oil

The invention puts forward a detection device and detection method for ferromagnetic abrasive grains in liquid oil. The device comprises a detection unit and a processor unit. The detection unit includes: a quartz crystal sensor that is disposed in the shell to divide the shell into a detection cavity and an oil holding cavity; a magnet disposed in the detection cavity; a main control board that is disposed in the detection cavity and is connected to the processor unit. The main control board is used for detecting the vibration signal of the quartz crystal sensor's quartz wafer, and the processor unit acquires the content of ferromagnetic abrasive grains in the to-be-detected oil according to the corresponding relationship of the vibration signal and the content of ferromagnetic abrasive grains in the to-be-detected oil. According to the detection device involved in the embodiment of the invention, the magnet attracts ferromagnetic abrasive grains in the to-be-detected oil to the upper surface of the quartz crystal sensor's first electrode, and performs mutual attraction with the ferromagnetic abrasive grains through magnetic force to change quartz wafer, and by means of the correlation curve of the quartz wafer's vibration variation quantity and the ferromagnetic grain content, the content of ferromagnetic abrasive grains in the to-be-detected oil can be obtained finally.
Owner:BEIJING ZHIGAN SENSOR TECH RES INST CO LTD
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