Patent application number | Description | Published |
20090102506 | ADAPTER - An exemplary adapter comprises an input port for connecting to a first hardware device; an output port for connecting to a second hardware device; a standby output port for connecting to the second hardware device; a programmable logic device (PLD) having at least one input terminal connected to the input port, at least one output terminal connected to the output port, at least one standby output terminal connected to the standby output port, and at least one control terminal to receive a voltage signal; and a jumper connected to the control terminal of the PLD to send a voltage signal thereto, wherein the input terminal of the PLD is selectively coupled to the output terminal or the standby output terminal of the PLD under the control of the voltage signal. | 04-23-2009 |
20090220628 | APPARATUS AND METHOD FOR CONTROLLING SERVOMOTOR OF ELECTRIC INJECTION MOLDING MACHINE - An apparatus and method for servomotors of an electric injection molding machine includes a motion controlling unit, two driving amplifying units, and two servomotors respectively connected to the driving amplifying units. The motion controlling unit includes two servomotor position controllers both for receiving a first position command, and the driving amplifying units are respectively connected to the servomotor position controllers for receiving a second and third position command. Two position detectors are respectively received in the two screw caps that are mounted to the servomotors for detecting absolute positions of the corresponding screw caps. The screw caps are respectively connected to inputs of the first and second servomotor position controllers to form two screw cap position feedback circuits. The values of the screw cap position feedback circuits are compared to the first position command for being input into the driving amplifying units to drive the corresponding servomotors to act synchronously. | 09-03-2009 |
20090221370 | FORCE FEEDBACK DEVICE - A force feedback device includes a platform, an elastic apparatus, a drive apparatus, a sensor, a control card, and a software system. The software system is configured to process data of a game and transmit data to the control card. The control card is configured to control the drive apparatus to drive the elastic apparatus. The elastic apparatus is configured to control the platform. The sensor is configured to sense the distortion of the elasticity apparatus to know the working status of the platform and transmit data of the distortion to the control card. The control card is configured to process the data of the distortion and transmit it to the software system to change information of the game. The force feedback device has bidirectional data and force transmission. | 09-03-2009 |
20090243129 | DETECTING APPARATUS - A detecting apparatus and method for detecting deformation of a fixed mold plate of an injection molding machine. The apparatus includes a mounting member and an elastic member that is received in the through hole of the mounting member and generally positioned at the center thereof. The apparatus also has a contacting member that is received in the through hole and positioned near or at the first end surface, and a sliding member that is slidably received in the through hole near or at the second end surface. A blocking member is attached to the second end surface of the mounting member. A pressure sensor is fixed between the blocking member and the contacting member. | 10-01-2009 |
20090279985 | FIXING UNIT - A fixing unit that includes a sleeve assembly defining a through hole along an axis thereof, and an assembly slidably received in the through hole. The assembly includes first and second end. An elastic claw extends from the first end. The second end can be actuated by a user. The elastic claw is biased towards an open state. The fixing unit moves between a first and a second position. In the first position, the elastic claw is received in the sleeve assembly and contracts. In the second position the elastic claw extends out of the sleeve assembly and expands. | 11-12-2009 |
20100001679 | ACCELERATION CONTROL APPARATUS AND METHOD - An acceleration control apparatus for servo control of a computer numerical control (CNC) machine comprises a digital filter. The digital filter is obtained by selecting a cutoff frequency of an analog filter and using a pole-zero matched method to transform an analog filter. The low-pass digital filter includes a signal input unit, a signal input register unit, a signal operation unit, a signal output unit, and a signal output register unit. | 01-07-2010 |
20100033351 | AUTO-DETECTION SYSTEM AND METHOD FOR COMMUNICATION PROTOCOL - An auto-detection system for communication protocol includes a driving device, a communication mode selection circuit and a human-machine interface circuit. The human-machine interface circuit transmits a detection signal to the driving device through the communication mode selection circuit. The detection signal includes a transmission speed identification and a transmission mode identification. The driving device sets its transmission speed according to the value of the transmission speed identification of the detection signal and sets its transmission mode according to the transmission mode identification of the detection signal. An auto-detection method for communication protocol using the auto-detection system for communication protocol is also provided. | 02-11-2010 |
20100052759 | PULSE GENERATOR - A pulse generator includes a pulse command register and a digital differential analyzer (DDA). The pulse command register includes a first register, a second register, and an adder. The first register receives and stores a pulse command from a CPU in an operating cycle. The second register receives and stores the pulse command shifted from the first register when the first register receives a second pulse command from the CPU in the operating cycle. The adder sums the pulse commands of the first register and the second register and the result is transmitted to the DDA. The DDA determines whether a pulse is to be generated after calculation according to the result from the adder of the pulse command register. | 03-04-2010 |
20100097022 | LOCATION SYSTEM AND METHOD - A location system is configured for determining a magnetic pole position of a motor. The location system includes a motor driver, a current control module, a current feedback apparatus, a speed feedback apparatus, and a magnetic pole position location module. The current control module is configured for set current of the motor via the motor driver. The current feedback apparatus is configured for sensing an actual current of the motor. The speed feedback apparatus is configured for sensing an actual speed of the motor. The magnetic pole position location module is configured for inputting a magnetic pole position of the motor, receiving the actual current from the current feedback apparatus, receiving the actual speed from the speed feedback apparatus, and processing the actual current and the actual speed to obtain an initial magnetic pole position. | 04-22-2010 |
20100097028 | DEVICE FOR CONTROLLING INDUCTION MOTOR - A device for controlling an induction motor includes a voltage/frequency controller, a pulse width modulation controller, and a converter. The voltage/frequency controller receives a controlling frequency, and outputs a controlling voltage corresponding to the controlling frequency. The pulse width modulation controller receives the controlling voltage and the controlling frequency, and generates PWM signals according to the controlling voltage and the controlling frequency. The converter receives the PWM signals, and controls the induction motor according to the PWM signals. There is a predetermined relationship between the controlling voltage and the controlling frequency stored in the voltage/frequency controller. The controlling voltage is greater than zero in response to the controlling frequency being zero, and increasing the controlling frequency increases the controlling voltage as in the predetermined relationship. | 04-22-2010 |
20100109639 | FREQUENCY SPECTRUM ANALYSIS SYSTEM AND METHOD - A frequency spectrum analysis system includes a control platform, a driver, and a controlled system. The control platform includes a first transmission device. The driver includes a second transmission device, a signal source, and a data logger. The first transmission device is connected to the second transmission device. The second transmission device is connected to the signal source. The signal source is connected to the data logger and the controlled system. The data logger is connected to the controlled system and the first transmission device. | 05-06-2010 |
20100146341 | DRIVER DETECTING SYSTEM AND METHOD - A detecting system for detecting functions of a driver includes a storage unit, a control unit, and an human machine interface (HMI). The control unit samples a plurality of functions of the driver to generate a plurality of sampled values at each preset sampling time. The control unit determines if the plurality of sampled values are normal according to a plurality of preset reference ranges for the plurality of functions stored in the storage unit. When one or more of the plurality of sampled values is abnormal, the control unit generates an alarm signal, and the HMI displays the plurality of sampled values. | 06-10-2010 |
20100148713 | MOTOR SPEED CONTROLLER - A speed controller used in a control loop of a motor includes a comparator, a processing device, and an arithmetic logical unit (ALU). The comparator compares a received instruction speed or a received measured speed of the motor with a predetermined speed value, outputs a first signal to the processing device when the received speed is greater than the predetermined speed value, or outputs a second signal to the processing device when the received speed is equal to or less than the predetermined speed value. The processing device receives a speed difference between the instruction speed and the measured speed. The processing device outputs a first proportional value when the first signal is received, or outputs a second proportional value when the second signal is received. The ALU outputs an instruction current to the control loop by calculating the proportional value according to a predetermined calculation rule. | 06-17-2010 |
20100260311 | ENCODING SYSTEM AND ENCODING METHOD - An encoding system includes an absolute encoder, a converter, a storage system, and a processor. The converter is connected between the absolute encoder and the storage system to determine amplitudes of two encoding waveforms from the absolute encoder when a motor rotates. The storage system determines an angle through which the motor rotates between a first time and a second time, according to the amplitudes of the two encoding waveforms. | 10-14-2010 |
20100277114 | APPARATUS FOR GENERATING SPEED INSTRUCTION FOR MOTOR CONTROL - A speed instruction generation apparatus of a motor interpolates a first position instruction to obtain a second position instruction. The second position instruction is a second-order continuous instruction. The second-order continuous position instruction is differentiated two times to obtain a compensation speed. The speed instruction generation apparatus further generates a first speed instruction according to a difference between an actual position value of the motor and the second position instruction. The first speed instruction is added to the compensation speed to obtain a second speed instruction to control a rotation speed of the motor. | 11-04-2010 |