34results about How to "No complex calculations required" patented technology

The invention discloses a turn-on angle control method for a switched reluctance motor, belonging to the technical field of angle control of switched reluctance motors. The invention provides an optimized control method for a turn-on angle based on characteristics of the switched reluctance motor. The method is realized by a position detection unit: a position level signal is generated by the position detection unit and then is encoded by a programmable logic device; and by using a microprocessor, actual rotate speed of the motor is calculated based on the position code, target current value required to conducting a phase winding by the switched reluctance motor is calculated by a PI algorithm, and angle position control is realized based on the target current value, an actual sampling current value and the actual rotate speed value by a special algorithm. The invention can realize automatic setting of the turn-on angle of the switched reluctance motor, improve control flexibility of the switched reluctance motor and simplify design of control program.

An electrostatic sensing device comprises an electrostatic sensing module and a control unit electrically connected to the electrostatic sensing module. The electrostatic sensing module comprises a first electrostatic sensing element comprising opposite ends, and two first electrodes. The two first electrodes are separately located on and electrically connected to the two opposite ends of the first electrostatic sensing element. The first electrostatic sensing element is a single walled carbon nanotube or a few-walled carbon nanotube. The control unit electrically is configured to apply a direct voltage to the first electrostatic sensing element and measure a current / resistance of the first electrostatic sensing element.

The invention discloses an image acquisition device and a face identity verification method based on the image acquisition device. The image acquisition device includes: a lens, the lens is used to obtain imaging light; After the lens, it is used to divide the light entering through the lens into a first light beam and a second light beam; an infrared image sensor, the infrared image sensor forms an infrared light based on the first light beam incident through the light splitting component image; a visible light image sensor, the visible light image forms a visible light image based on the second beam of light incident through the light splitting component; wherein, the infrared image sensor and the visible light image sensor are arranged in parallel behind the light splitting component and The relative position is fixed. The image acquisition device can save the process of judging whether the infrared image and the visible light image are the same person. This face authentication method has similar advantages.

The present invention relates to the field of indoor positioning and particularly relates to a high precision indoor positioning system and corresponding method based on a characteristic light source and a small hole lighting device. The positioning is three-dimensional spatial positioning. The system comprises the characteristic light source, the small hole lighting device and a processor. The method comprises the steps of light source arrangement, information inputting, position selection and lighting, characteristic matching, and position calculation. Compared with a traditional indoor positioning system, the indoor positioning technology provided by the invention has the advantages of high accuracy, low cost, good real-time performance, and excellent scalability and portability.

The invention relates to an automobile automatic clutch driving mechanism based on a volute compensation spring. Produced automatic clutch control systems are not formed in our country at the moment. The automatic clutch driving mechanism is an important component part of the automatic clutch control system. The automobile automatic clutch driving mechanism comprises a direct current driving motor arranged on a bracket and a self-locking worm and gear retarding mechanism connected with the clutch driving mechanism. A center driving shaft (13) arranged in a cylindrical steel barrel is connected with a worm wheel of the self-locking worm and gear retarding mechanism. The center driving shaft is respectively connected with a driving disc (1) and the inner end of a volute compensating spring (5). The driving disc is connected with a clutch inhaul cable (2). The outer end of the volute compensating spring is connected with a cylinder (11). The volute compensating spring is pre-tightened inadvance before being arranged. The cylinder is internally provided with a mechanical position-limit mechanism (4), the volute compensating spring and a side angular position sensor (6). The automobile automatic clutch driving mechanism is applied to the automobile automatic control field.

The present invention relates to the field of indoor positioning and particularly relates to a high precision indoor positioning system and corresponding method based on a characteristic light source and a spherical lighting device. The positioning is three-dimensional spatial positioning. The system comprises the characteristic light source, the spherical lighting device and a processor. The method comprises the steps of light source arrangement, information inputting, position selection and lighting, characteristic matching, and position calculation. Compared with a traditional indoor positioning system, the indoor positioning technology provided by the invention has the advantages of high accuracy, low cost, good real-time performance, and excellent scalability and portability.

The present invention relates to the field of indoor positioning and particularly relates to an indoor positioning system and positioning method for multiple characteristic light sources. The positioning is three-dimensional spatial positioning. The system of the invention comprises a light collection device, a communication module, and a processor. The method of the invention comprises the steps of device arrangement, information recording, signal collection, and position calculation. Compared with a traditional indoor positioning system, the indoor positioning technology provided by the invention has the advantages of high accuracy, low cost, and good real-time performance.

An electrostatic sensing method is provided. An electrostatic sensing device comprising an electrostatic sensing module comprising a first electrostatic sensing element, and a control unit electrically connected to the electrostatic sensing module is provided. The first electrostatic sensing element is one-dimensional semiconducting linear structure. A direct voltage is applied to the first electrostatic sensing element. A sensed object with electrostatic charge is moved to the electrostatic sensing device in a distance near but not touching the first electrostatic sensing element. A resistance changed value of the first electrostatic sensing element is measured.

The invention discloses a multistage thermoelectric cooler parameter vacuum testing device which comprises a vacuum cavity, a vacuum pump, a water-cooling head, a temperature control cooling water circulation device, a heating resistor module, a cold-end temperature measurement resistor, a hot-end temperature measurement resistor, a direct current power source, and a data processing and displaying module. A vacuum pumping valve and an air vent valve are arranged on the vacuum cavity. The vacuum cavity is sealed with the water-cooling head through a vacuum rubber ring and connecting screws. A hot end of a thermoelectric cooler achieves heat dissipation and temperature control through the water-cooling head and the temperature control cooling water circulation device. The data processing and displaying module is used for carrying out real-time control, data processing and result displaying on appliances in the device. Through adoption of the multistage thermoelectric cooler parameter vacuum testing device, the current-voltage response relation and the current-refrigerating capacity relation of the multistage thermoelectric cooler, the refrigerating efficiency of the multistage thermoelectric cooler under different heat dissipation conditions and other parameters can be obtained. The multistage thermoelectric cooler parameter vacuum testing device is simple in structure, convenient to operate, high in measuring accuracy, and capable of effectively preventing a cold end of the thermoelectric cooler from dewing in the testing process of large temperature difference.

A single-ended traveling wave fault location method, which uses electrical components that can change the characteristics of the traveling wave waveform at the opposite end bus to change the characteristics of the reflected wave waveform of the opposite end bus, making it significantly different from other traveling wave waveforms ; When the reflected wave is passed back to the reference end, the traveling wave acquisition and processing device at the reference end will record the waveform, because there is a significant difference between the reflected wave waveform of the opposite end bus and other waveforms, it can be directly obtained from multiple Find the reflected wave of the opposite-end bus in the waveform; bring the time data corresponding to the first wave and the reflected wave of the opposite-end bus into the corresponding ranging formula, and the ranging can be completed. A single-end traveling wave fault location method of the present invention adopts the method of marking the reflected wave of the opposite end, and directly identifies the reflected wave of the bus at the opposite end from the numerous wave head information at the traveling wave acquisition and processing device end, and uses the wave head information The distance measurement is completed, and the operation is simple and convenient. It does not require complicated calculation and transformation, and can be used independently.