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363results about How to "Low cost requirements" patented technology

Wireless sensor network application-oriented low-power consumption radio frequency receiving and sending device

The invention discloses a wireless sensor network application-oriented low-power consumption radio frequency receiving and sending device which comprises a duplexer, a radio frequency front end, a variable gain complex filter, an automatic frequency tuning circuit, a programmable gain amplifier, a phase-locked loop frequency synthesizer, a digital processor, a storage, a variable gain power amplifier, a mixer and a low pass filter, wherein the duplexer, the radio frequency front end, the variable gain complex filter, the automatic frequency tuning circuit and the programmable gain amplifier form a receiving link which is used for receiving and processing a radio frequency signal and converting the radio frequency signal into a low-medium frequency digital signal so that the signal can be conveniently processed by a subsequent analog-digital converter later; the duplexer, the variable gain power amplifier, the mixer and the low pass filter form an emitting link which is used for mixing a baseband analog modulation signal into a carrier frequency and sending a wireless signal; and the receiving link and the emitting link share the duplexer. The wireless sensor network application-oriented low-power consumption radio frequency receiving and sending device realizes singlechip integration by adopting a standard CMOS (Complementary Metal Oxide Semiconductor) process, is simple in structure and low in power consumption, and is applicable to a wireless sensor network.
Owner:INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI

Single crystal lithium-rich manganese-based anode material, preparation method thereof, lithium ion battery

The invention relates to a preparation method of a single crystal lithium-rich manganese-based anode material. In the process of preparing a single crystal lithium-rich manganese-based anode materialby calcining a lithium-rich manganese-based material precursor, the method comprises the following steps: S1, firstly, pre-sintering the lithium-rich manganese-based material precursor, and carrying out crushing treatment to obtain scattered oxide of the lithium-rich manganese-based material precursor; S2, uniformly mixing the oxide of the lithium-rich manganese-based material precursor with a lithium source and then sintering to obtain the oxide of the lithium-rich manganese-based material precursor. More preferably, a small amount of additive is mixed while mixing lithium after pre-sinteringand crushing; and the mixed additive may induce crystal growth and grain boundary fusion, which is favorable for forming a single crystal and improving the structure of the crystal; pre-sintering andcrushing can reduce the particle diameter to a relatively desirable range, so that the sintered body has better kinetic performance and achieves better mixing uniformity when mixing lithium and mixing the additive, to promote the formation of the single crystal. By means of such a preparation method, a lithium-rich manganese-based anode material having a high degree of single crystallization anda uniform particle diameter can be obtained.
Owner:桑德新能源技术开发有限公司 +1

Multifunctional driving monitoring early warning system based on mobile terminal

The invention discloses a multifunctional driving monitoring early warning system based on a mobile terminal. According to the multifunctional driving monitoring early warning system, data are collected through four wide-angle cameras arranged on a front grating, a left side door mirror, a right side door mirror and a tail door of a vehicle respectively; then, the data are synthesized to form a complete image through the image processing technology; meanwhile, after electronic power-assisted steering data in an ECU of a vehicle and related working condition information of other vehicles are collected through an OBD2 port data collector which is connected to the ECU of the vehicle and comprises a main chip, namely, an eml327 chip, a 2.4 G module and other related circuits, the data are transmitted to a controller through the 2.4 G wireless technology; advancing trajectory prediction of the vehicle is calculated according to other data, including the axle base, the wheel tread and the like, of the vehicle; finally, the image where trajectory prediction is conducted is outputted to the mobile terminal device such as a mobile phone in a wireless mode, and the data are displayed through the mobile terminal device. According to the multifunctional driving monitoring early warning system, real-time image transmission and detection are achieved through a wireless communication method at a low cost.
Owner:SICHUAN PEIYANG TECH

Thermostatic equipment and control method thereof

The invention discloses thermostatic equipment. In the equipment, an air passage is arranged in the back of a cavity and is sequentially equipped with a refrigerating system, a heating system and a fan from bottom to top, wherein wind blown from the fan flows towards an operating cavity via an air inlet, then returns to the air passage via an air outlet from the operating cavity after being bounced by a box door, and finally enters the operating cavity through the refrigerating system, the heating system and the fan so as to form one cycle. The thermostatic equipment can achieve better temperature uniformity only by virtue of the simple air channel structure, thus the structure of the equipment is simple and the processing cost and processing requirements are lowered. The invention further provides a method for controlling the thermostatic equipment. The method has the beneficial effects that parameters can be set as required; and by utilizing the method, the heating system and the refrigerating system are respectively controlled and meanwhile the temperature in the operating cavity is cooperatively controlled so that the temperature in the operating cavity is approximate to an expected temperature as far as possible. Therefore, the control method is simple and effective and can be used for greatly lowering the debugging requirement.
Owner:SUZHOU JIEMEI ELECTRONICS

Maximal power matched transmission converting method and maximal power matched transmission converting device of photovoltaic cell

The invention belongs to the field of photovoltaic cells and discloses a maximal power matched transmission converting method and a maximal power matched transmission converting device of a photovoltaic cell. The method comprises the following steps: (1) converting a characteristic of a current source output by the photovoltaic cell into a characteristic of a voltage source; (2) detecting the output voltage of the voltage source and controlling an integrated circuit to sample an output voltage value by pulse-width modulation (PWM); (3) adjusting the output duty ratio in such a way that a duty ratio signal is directly proportional to the output voltage value; (4) outputting the duty ratio signal and connecting a power switch pipe, wherein the power switch pipe is connected with the primary side of a high frequency transformer, and the secondary side is connected with a load by an output rectifying circuit; (5) adjusting the opening and the closing of the power switch pipe by the duty ratio signal, changing the input resistance characteristic of the primary side of the high frequency transformer, tracing and matching the equivalent internal resistance characteristic of the photovoltaic cell and realizing the maximal output power of the photovoltaic cell. The invention can realize rapid, continuous and smooth real-time maximal power matching and tracing and greatly reduce the development cost and the development requirement due to adopting no SCM or DSP chip.
Owner:浙江源控节能科技集团有限公司

Novel full-automatic biochemical analyzer

InactiveCN104034908AMiniaturizationAvoid the shortcomings of large space occupation, complex structure and high costMaterial analysisTest efficiencyBiochemical engineering
The invention discloses a novel full-automatic biochemical analyzer, comprising a pedestal (15), a reagent-sample introducing and stirring system (4), a control circuit module, a sample storage device, a reagent storage device, a rotary reaction disc (13), a stepping motor used for driving the reaction disc to rotate, a cleaning system (11), a plunger pump (12), a photoelectric detection system (9) and an XYZ triaxial moving system used for driving the reagent-sample introducing and stirring system to rotate, wherein the control circuit module, the sample storage device, the reagent storage device, the rotary reaction disc (13), the stepping motor, the cleaning system (11), the plunger pump (12), the photoelectric detection system (9) and the XYZ triaxial moving system are arranged on the pedestal, and the reagent-sample introducing and stirring system (4) has an integrated introducing and stirring function and is arranged on a Z-direction sliding assembly. The novel full-automatic biochemical analyzer provided by the invention integrates procedures consisting of sampling, sample introduction, stirring, analysis and detection, cleaning, etc., realizes full process automation and has the advantages of a high degree of automation, convenient operation, low cost, high testing efficiency and easy popularization and application.
Owner:SHENZHEN ICUBIO BIOMEDICAL TECH

Preparation method and application of hydrophobic starch sulfate ester in cement water-reducing agent

ActiveCN104017093AHas a weak retarding effectImprove liquidityReducing agentMethanol
The invention relates to a preparation method and an application of a hydrophobic starch sulfate ester in a cement water-reducing agent, and belongs to the fields of chemistry and chemical engineering. The preparation method comprises the following steps: adding a sulfamic acid, starch, urea, aliphatic tertiary alcohol or aryl methyl alcohol and water into a reactor under the conditions that the molar ratio of the sulfamic acid to the starch is (0.5-3.0):1, the molar ratio of the urea to the starch is (0.1-3.0):1, the molar ratio of the aliphatic tertiary alcohol or the aryl methyl alcohol to the starch is (0.1-1) and the adding amount of the water accounts for 10% to 30% of the dry weight of the starch; and reacting for 1 to 10 hours at a temperature of 80 DEG C to 150 DEG C, thereby obtaining the hydrophobic starch sulfate ester in which the sulfonyl substitution degree is between 0.04 and 0.89 as well as the alkyl substitution degree is between 0.01 and 0.2. The hydrophobic starch sulfate ester is applied to the cement water-reducing agent, wherein the mass percent of the hydrophobic starch sulfate ester accounts for 0.1% to 1.0% of that of cement. According to the method, a dry method and one-pot reaction are adopted, so that the environmental pollution caused by the application of an organic solvent is avoided. Thus, the production cost is decreased.
Owner:DALIAN UNIV OF TECH

Rail transit half-height emergency exit lock and half-height emergency exit

The invention discloses a rail transit half-height emergency exit lock which comprises a mounting base and a locking mechanism arranged on the mounting base. The locking mechanism comprises an external lock disc arranged on the mounting base through a rotating shaft, an internal lock disc, a lock arm arranged on the mounting base and a drive mechanism. A lock opening matched with a sliding door lock pin is arranged on the external lock disc. The external lock disc is provided with a lock-up position for limiting the sliding door lock pin in the lock opening and a releasing position for releasing the sliding door lock pin. The internal lock disc and the external lock disc are coaxially fixed with each other. The lock arm is provided with a first working position abutting against the internal lock disc to keep the external lock disc in the lock-up position state or in the releasing position state and a second working position for releasing the internal lock disc. The drive mechanism is used for driving the lock arm to be switched between the first working position and the second working position. The invention further discloses a rail transit half-height emergency exit. According to the rail transit half-height emergency exit lock and the rail transit half-height emergency exit, features of all parts are fully utilized to conduct designing, reasonable arrangement of the structure is achieved, the lock is simpler and more reliable to use, processing cost is reduced, and the mounting requirement is lowered.
Owner:HANGZHOU OPTIMAX TECH

Integrated type intelligent socket and power network control system

InactiveCN104269710AEasy to buildLow costCoupling device detailsState of artEnvironmental limitations
The invention provides an integrated type intelligent socket and a power network control system. The integrated type intelligent socket integrates the power control, the wireless communication capacity, the power carrier capacity and the gateway communication capacity, the power network control system can be constructed through simple power connection by the utilization of the integrated type intelligent socket, and equipment conditions are created for constructing the power network control system more conveniently with the low cost. The power network control system constructed based on the integrated type intelligent socket is free of additional local networks and complex gateway equipment, the complexity of a network framework is simplified, the hardware cost and the technical requirements of the network are reduced, environmental limitation caused by the wiring requirement is reduced, the system can be applied and implemented under the complex environment more easily, the problems that a power network control system is complex in network structure and high in hardware cost and technical requirement, and can not be applied under the complex and special environment in the prior art are well solved, and the system has better technical application and popularization value.
Owner:CHONGQING JINOU SCI & TECH DEV

Automatic cipher machine test system and working method thereof

The invention discloses an automatic cipher machine test system and a working method of the automatic cipher machine test system. The automatic cipher machine test system comprises a cipher machine and a test machine. The test machine is provided with a test maintenance tool, a template library, a knowledge library and a firmware library. The firmware library is arranged on the cipher machine. A single instruction test method of the system includes the steps that the template library of the test machine prepares test templates, the test maintenance tool is led in and generates request data, and then the request data are sent to the cipher machine; the cipher machine returns response data. A batch instrument test method includes the steps that test files of the knowledge library are led in or loaded to the test maintenance tool; the test maintenance tool sends the test files to the cipher machine; the cipher machine returns the response data; the response data and historical data are compared, and then whether a test result is correct or not is judged; the steps are repeated to conduct batch test. According to the automatic cipher machine test system and the working method, automatic test and maintenance management of the cipher machine is achieved, and difficulties, cost and technical requirements of production, test and maintenance of the cipher machine are reduced.
Owner:中电科网络安全科技股份有限公司

Fixed mobile convergence wavelength division access ring and access method

The invention discloses a fixed mobile convergence wavelength division access ring and an access method and relates to the metro area access field. The access ring takes CO OLT as a network convergent point to form annular topology, the ring internally comprises a main fiber and a standby fiber, each area business is accessed to OADM through R-OTU; under the main state, in a downlink direction, a signal sent by the CO OLT to the OADM realizes clockwise transmission in the main fiber; in an uplink direction, a signal sent by the OADM to the CO OLT realizes anticlockwise transmission in the standby fiber; in a standby state, after a node next to a fault point switches a signal to the standby fiber, a signal sent by the CO OLT to the OADM realizes anticlockwise transmission in the standby fiber, and a signal sent by the OADM to the CO OLT realizes clockwise transmission in the standby fiber. The fixed mobile convergence wavelength division access ring can satisfy low cost requirements of fixed access, mobile backhaul and robustness requirements of a great customer hotline, is convenient for network establishment and operation and maintenance, is consistent with trends of large bandwidth access and network flatness, is flexible in bandwidth distribution and is easy to upgrade.
Owner:WUHAN POST & TELECOMM RES INST CO LTD

Biological ventilation enhanced in-situ multi-phase extraction system

The invention belongs to the technical field of environmental remediation and particularly relates to a biological ventilation enhanced in-situ multi-phase extraction system. The biological ventilation enhanced in-situ multi-phase extraction system comprises a biological ventilation unit which uniformly injects air into a contaminated soil area and a nutrient solution injection unit which uniformly injects a nutrient solution into the contaminated soil area. The biological ventilation enhanced in-situ multi-phase extraction system further comprises a contaminant double-pump extraction unit, agroundwater treatment unit, an unsaturated zone gas treatment unit and extraction wells. The extraction wells are arranged under the ground of the contaminated soil area. The contaminant double-pump extraction unit is arranged on the ground of the contaminated soil area. The contaminant double-pump extraction unit is connected with the groundwater treatment unit and the unsaturated zone gas treatment unit. According to the biological ventilation enhanced in-situ multi-phase extraction system, the efficiency and effect of in-situ multi-phase extraction remediation of the soil and groundwater contaminated by organic matter can be enhanced through biological ventilation, and remediation of the contaminated soil and remediation of groundwater are achieved at the same time by separately extracting the groundwater and soil gas through the double-pump system.
Owner:CHINA CITY ENVIRONMENT PROTECTION ENGINEERING LIMITED COMPANY

Millimeter-wave circularly-polarized array antenna and radiation body thereof

The invention discloses a millimeter-wave circularly-polarized array antenna and a radiation body thereof. The antenna comprises a first dielectric substrate, a second dielectric substrate, a first floor, a feeding network and the radiation body, wherein the radiation body, the first dielectric substrate, the first floor, the second dielectric substrate and the feeding network are sequentially arranged from top to bottom, the radiation body comprises a radiation plate and a plurality of radiation units, the plurality of radiation units are arranged on the radiation plate, each radiation unit comprises four short-circuit patches, L-shaped branches are loaded at opposite corners of two of the short-circuit patches, cutting parts are arranged at opposite corners of the other short-circuit patches, and each radiation unit is connected with the first floor via a through hole in the first dielectric substrate. The millimeter-wave circularly-polarized array antenna has relatively long bandwidth, relatively large gain and relatively wide circularly-polarized shaft ratio and is simple in structure, and the requirement (42.3-48.4GHz) of a broadband wireless access system of industry and information technology planning used in millimeter-wave band mobile service can be met.
Owner:SOUTH CHINA UNIV OF TECH
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