43results about How to "Implement position detection" patented technology

The invention relates to an intelligent door lock. The intelligent door lock comprises a front panel, a back panel, a lock head, a front handle and a back handle. The lock head comprises a lock body, a lock head panel, an inclined tongue, a safety square tongue, a counter lock square tongue, a top and bottom hook and a lock cylinder, and a square hole, a lock cylinder hole and a counter lock square hole are formed in the lock body. A key hole is formed in the front panel and is communicated with the lock cylinder hole, and a counter lock knob is arranged on the back panel and penetrates through the back panel to be communicated with the counter lock square hole. A camera, a keyboard and a fingerprint collecting window are arranged on the front panel, a battery, a circuit board and a motor are arranged on the back panel, the battery is electrically connected with the camera, the keyboard, the fingerprint collecting window and the motor, the keyboard and the fingerprint collecting window are electrically connected with the motor through the circuit board, and the motor is connected with the lock cylinder through the lock cylinder hole. The intelligent door lock is simple in structure and variable in function, and is particularly applied to transforming a common mechanical safe-guard chain door lock into the intelligent door lock; the overall door lock can be transformed and upgraded without detachment, and operation is easy and rapid.

The invention discloses a method of detecting ball grooves of a waveform surface of a shift swing rod. A measuring tool comprises a base plate, a positioning shaft, a first supporting block, a lining, a positioning pin, a second supporting block, measuring blocks, and a cover plate. The method comprises the following steps: 1) sleeving the positioning shaft with a spindle sleeve of a shift swing rod, and make the first ball groove of a waveform surface of the shift swing rod face the positioning pin; 2) enabling the right end of the positioning pin to press against the first ball groove of the waveform surface; 3) controlling the first measuring block to move leftwards to check whether a clamping groove in the left end of the first measuring block can clamp a ball head; 4) controlling the positioning pin to loosen the shift swing rod so that the second ball groove of the waveform surface of the shift swing rod faces the positioning pin; 5) enabling the right end of the positioning pin to press against the second ball groove of the waveform surface waveform surface; and 6) controlling the second measuring block to move leftwards to check whether a clamping groove in the left end of the second measuring block can clamp a ball head. The method can detect the positions of the two ball grooves of the waveform surface of the shift swing rod, is simple, fast and labor-saving to operate, and provides an accurate and reliable detection result.

The invention belongs to the technical field of brushless DC motors, and relates to an axially integrated oil-immersed brushless DC motor position sensor installation structure, wherein a Hall PCB board (9) and a Hall position sensor (10) are installed inside a controller, And a Hall seal cover (6) for the mechanical seal controller is installed at the connection position between the motor body shell (1) and the controller shell (5). The Hall seal cover (6) is generally circular, and the middle part It has a circular protrusion, and the internal space of the circular protrusion is matched with the rotor position magnetic ring (4), and the material is magnetically conductive metal; the Hall seal cover structure of the present invention can realize the mechanical connection between the controller and the motor body. Sealed, the Hall sensor can sense the magnetic pole of the magnetic ring to achieve position detection, the motor can remove the sealed connection, the Hall seal cover is small in size, thin in thickness, light in weight, easy to disassemble, improves reliability and maintainability, and can be widely used for various motors.

The invention discloses an information tape detection system for an elevator, comprising: a frame; a simulation device capable of installing an information tape and simulating the movement of an elevator car, which includes a first rotating wheel, a second rotating wheel and a first rotating wheel capable of driving wheel or the driving unit of the second rotating wheel, wherein the first rotating wheel and the second rotating wheel are connected together by an information belt. The two information readers are arranged on the frame, and each position of the information tape is correspondingly stored with corresponding position information, and the two information readers respectively read the corresponding information tape position information from the information tape. The central controller is connected with the drive unit, which is used to control the steering and rotation speed of the drive unit. The central controller is also connected with two information readers, and is used to receive the two positions of the information tape read by the two information readers. information. The invention solves the technical problem that the prior art cannot provide fast, accurate and effective information tapes.

The invention discloses an alternating pole brushless permanent magnet motor, which is used in an electronic power steering system. The motor includes: a stator core in the shape of a hollow cylinder, the inner wall of which has slots, and the stator windings are placed in the corresponding stator slots. Inside; the rotor core in the shape of a hollow cylinder is coaxially sleeved in the central through hole of the stator cylinder, and its outer surface is provided with a plurality of slots, and the number of slots is half of the number of poles in the operating magnetic field of the motor; and a plurality of Magnetic steel, which is placed in each slot of the rotor core in one-to-one correspondence, and the polarity of the magnetic steel in adjacent slots is the same, so that the rotor magnetic steel only has a single polarity, forming a salient pole structure, thereby reducing the amount of permanent magnets while maintaining the output torque of the motor. The invention also discloses a corresponding electronic power steering system. The device of the invention optimizes and improves the rotor structure of the permanent magnet motor, reduces the permanent magnet consumption of the motor rotor and can save the position sensor of the power steering system.

The invention discloses a wireless positioning method and system for an underground space. The wireless positioning method comprises the steps of arranging wireless access points in the underground space, and constructing a fingerprint database; acquiring RSSI information of the position of the target object, matching the RSSI information with the fingerprint database to obtain a predicted value of the position of the target object, acquiring inertial data, and performing track reckoning to obtain a measured value of the position of the target object; adopting Kalman filtering to fuse the predicted value and the measured value to obtain the position of a target person; and when no target object exists in the underground space, processing the CSI data sent by the wireless access point, anddetecting whether illegal invasion exists in real time. According to the method, the RSSI fingerprint positioning and the PDR positioning are fused through Kalman filtering, respective defects of theRSSI fingerprint positioning and the PDR positioning are overcome, and accurate positioning in narrow, closed and long-distance underground space can be achieved; only a small number of wireless access points need to be deployed and combined with widely applied smart phones, the cost is low, and the operation is simple.

The invention relates to a brushless direct current motor rotor position detection method based on single-phase inductance detection. The brushless direct current motor rotor position detection methodincludes the following steps that a detection vector with the time duration being delta T1 is applied to a motor stator winding, the detection phase current is sampled at the beginning and end of vector application correspondingly, and the current change rate is obtained through subtraction of two values; a driving vector with the time duration being delta T2 is applied to the motor stator winding to drive a motor to run; induction energy is released slowly and the motor driving current is maintained by applying a circulation follow current vector in the remaining time of the control period;the variation trend of frac{d}{d<t>} is judged; and the execution steps are repeated continuously after a motor rotor passes through a switching point, and the motor rotor is switched to the next section after waiting for a delay at an electrical angle of 30 degrees.

The invention discloses a system and a method for detecting hoisting prevention on the basis of laser. The system comprises a logic operation unit, a laser scanner and a PLC (programmable logic control) system. The laser scanner and the PLC system are connected with the logic operation unit. Compared with the prior art, the system and the method have the advantages that the locations of lifting appliances, containers, trucks and the like can be detected by the aid of laser scanning ranging principles and pattern recognition and automatic control technologies in real time, running of lifting mechanisms can be controlled according to safety control strategies, the system has functions of preventing the trucks from being hoisted, and accordingly production accidents can be prevented; the side contours can be continuously scanned and recognized during operation on the containers, accordingly, hoisted states of the trucks can be accurately judged, and the container loading and unloading safety can be greatly enhanced.

An incremental linear rotation two-degree-freedom position detecting device comprises an integrated cup-shaped code disc, photoelectric sensors, a linear rotation bearing and a housing and is characterized in that the integrated cup-shaped code disc is a cup-shaped structural body made of acrylic material, the bottom of the cup-shaped structural body is a disc with a central hole, m black and white strips are marked along the circumference direction of the disc, n black and white strips are marked along the axial direction of the cylindrical outer wall of the cup-shaped structural body, and the photoelectric sensors comprise a reflected light type linear displacement photoelectric sensor and a transmitted light type rotation angle displacement photoelectric sensor. The incremental linear rotation two-degree-freedom position detecting device realizes linear and rotation two-degree-freedom position detection, reduces the sizes of position sensors and ensures the precision of linear and rotation two-degree-freedom position detection.