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44results about How to "Simplify System Design" patented technology

Line voltage compensation circuit used for LED drive

ActiveCN103841730ASimplify System DesignImprove anti-interference ability and reliabilityDc-dc conversionElectric light circuit arrangementInductorPeak value
The invention discloses a line voltage compensation circuit used for LED drive. The circuit comprises a line voltage sampling unit, a compensation voltage generation unit, an inductance peak current sampling resistor, an adder unit, a comparator unit and a control and drive unit, wherein the line voltage sampling unit is used for sampling bus voltage of an LED constant current drive circuit, the compensation voltage generation unit is used for generating a compensation voltage value needed by the LED constant current drive circuit under the corresponding bus voltage, the inductance peak current sampling resistor is used for sampling peak currents of an inductor, the adder unit is used for adding the voltage value of peak current sampling resistance of the LED constant current drive circuit and the compensation voltage value generated by the compensation voltage generation unit, the comparator unit is used for generating an outage signal enabling a power switch tube to be shut down, and the control and drive unit is used for driving the power switch tube and carrying out constant current control on the whole LED constant current drive circuit. The line voltage compensation circuit omits line voltage compensation resistance in the traditional technology, and improves anti-interference performance and reliability of a system.
Owner:深圳市梓晶微科技有限公司

Brain-computer interface system based on clinic brain-electrical signal control machine hand movement and application thereof

The invention discloses a brain-computer interface system based on clinic brain-electrical signal control machine hand movement. The brain-computer interface system comprises a signal collection module, a brain-electrical signal feature extraction and decoding module, a machine hand control module and a peripheral module, wherein the signal collection module is used for pretreating collected clinic brain-electrical signals and inputting the pretreated signals into the brain-electrical signal feature extraction and decoding module; the brain-electrical signal feature extraction and decoding module is used for extracting the features of the pretreated brain-electrical signals; the machine hand control module is used for classifying the features of the pretreated brain-electrical signals and sending classification labels to machine hands to complete gesture movement; and the peripheral module is used for supervising and feeding back a task executed by the machine hands. The invention also discloses an application method of the brain-computer interface system. High-precision online machine hand gesture control can be realized by utilizing the clinic cortical brain-electrical signals with relatively high temporal-spatial resolution and small invasion degree.
Owner:ZHEJIANG UNIV

IEEE (Institute of Electrical and Electronics Engineers)-1394b optical bus protocol converter based on Versa PHY (Physical Layer)

The invention discloses an IEEE (Institute of Electrical and Electronics Engineers)-1394b optical bus protocol converter based on a Versa PHY (Physical Layer), which comprises a photoelectric conversion module, an IEEE 1394 protocol module and a central processing module, wherein the photoelectric conversion module is used for converting data received from an IEEE 1394 optical bus into an electrical signal and sending the electrical signal to the IEEE 1394 protocol module and is used for converting data received from the IEEE 1394 protocol module into an optical signal and sending the optical signal onto the IEEE 1394 optical bus; the IEEE 1394 protocol module is used for sending the electrical signal sent by the photoelectric conversion module after conversion by an IEEE 1394 protocol to the central processing module and is used for sending data sent by the central processing module after conversion by the IEEE 1394 protocol to the photoelectric conversion module; and the central processing module is used for sending the data sent by the IEEE 1394 protocol module after conversion by a Versa PHY protocol and is used for sending the received data after conversion by the Versa PHY protocol to the IEEE 1394 protocol module. According to the IEEE-1394b optical bus protocol converter based on the Versa PHY, the system design is simplified, the cost is saved, the power consumption is reduced and the real-time performance of protocol conversion is increased.
Owner:BEIHANG UNIV

TWS (true wireless stereo) earphone pairing method and TWS earphone

The invention discloses a TWS (true wireless stereo) earphone pairing method and a TWS earphone. The TWS earphone pairing method comprises the following steps: a main earphone and an auxiliary earphone are respectively provided with a communication interface; the main earphone and the auxiliary earphone are physically connected through the communication interfaces; the main earphone and the auxiliary earphone interact with Bluetooth addresses through the communication interfaces and store the Bluetooth addresses; and when a TWS earphone is normally used, the main earphone and the auxiliary earphone are subjected to Bluetooth pairing according to the stored Bluetooth addresses of the opposite side. According to the method in the invention, a physical connection mode is adopted for interaction of the Bluetooth addresses between the left earphone and the right earphone and completion of the pairing function between the left earphone and the right earphone without the need of participationof a third-party platform, and the system is simple in design and low in cost. Moreover, by adoption of the TWS earphone pairing method in the invention, the complexity of earphone pairing operationcan be reduced, and the quickness, reliability and stability of pairing between the left earphone and the right earphone are improved. When one earphone is lost, only one new earphone needs to be purchased to be matched with the earphone which is not lost for normal use, thereby reducing the purchasing cost of users and avoiding resource waste.
Owner:WEIFANG GOERTEK ELECTRONICS CO LTD

Energy safeguard design method for an inertial space observation satellite

The invention provides an energy safeguard design method for an inertial space observation satellite. The energy safeguard design method comprises the following steps: (1) determining an inertial space observation satellite body coordinate system and a fixed sun-facing surface according to a satellite basic configuration and a solar wing mounting direction; (2) designing an attitude control algorithm on the basis of a fixed sun alignment surface, and minimizing an included angle between a solar vector and a vertical plane of a sailboard mounting shaft in a single observation process on the premise of ensuring observation direction and observation coverage required by observation; (3) designing a solar wing tracking algorithm according to the change rule of solar vectors based on an attitude control algorithm design result, so that the whole satellite obtains the maximum energy in the whole observation process; And (4) judging whether the energy design requirement is met by the satellites in the whole observation process or not, if so, ending, and otherwise, re-executing the steps (1)-(4). Excellent solar cell illumination conditions can be provided for the satellite system, the design difficulty of the satellite energy system is reduced, and energy supply of the whole satellite is ensured.
Owner:BEIJING INST OF SPACECRAFT SYST ENG

Automatic sorting method and system

The invention discloses an automatic sorting method and a system. The automatic sorting method and the system are used for automatic unloading of cargos on a transportation unit at an unloading stall.The automatic sorting method comprises following steps: cargo information of the transportation unit is obtained; based on the acquired cargo information, the information of a pre-set stall is searched so as to obtain target unloading stall information corresponding to the cargo information, and the target unloading stall information is sent to the transportation unit; wireless communication between the transportation unit and the unloading stall is carried out through controlling to obtain the target unloading stall information and address information of a plurality of unloading stalls; andan executing mechanism is controlled to realize automatic unloading of the cargos at the target unloading stall when the acquired target unloading stall information is consist to the address information of the unloading stalls. The automatic sorting method is capable of realizing independent calculation and unloading of each transportation unit based on receive information, the unloading instructions are generated independently and are controlled, so that unloading efficiency is increased greatly, and system damage rate is reduced.
Owner:杭州银弹科技有限公司

Bus current limiting control method and device for automotive brushless direct current motor

The invention relates to a bus current limiting control method and device for an automotive brushless direct current motor. The method mainly comprises the following steps that: a main control chip receives current signals processed by a conditioning and filtering unit and performs PI compensation control according to a set current limiting value, an allowed maximum duty cycle for avoiding current exceeding the limit value is figured out and is compared with the duty cycle of driving willing, the allowed duty cycle takes a minimum value, and a PWM (Pulse-Width Modulation) control signal corresponding to the minimum duty cycle is output to an inverter driving motor according to the value. The device comprises a current detecting module, a signal filtering module, a main control chip and an inverter which are connected with one another in sequence, wherein the current detecting module and the inverter are all connected with the brushless direct current motor, the current detecting module is used for collecting bus current, and the inverter is used for driving the brushless direct current motor. Compared with the prior art, the method and the device are easy to implement and low in cost, can effectively solve the problem of overheating of the motor, and cannot influencing the driving of a driver under normal conditions.
Owner:SHANGHAI CHONGSU ENERGY TECH CO LTD
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