Abstract: A calibration method for a coordinate system of a workpiece held by a robot manipulator, which includes the following steps: setting a predicted coordinate system on the workpiece; controlling the drive mechanism to drive the workpiece to move a specific distance along a coordinate axis in the predicted coordinate system and measuring the distance change of the workpiece in a direction perpendicular to the move; using the measured distance change to determine an orientation error between the predicted coordinate system and the actual coordinate system; correcting the orientation parameters of the predicted coordinate system; controlling the drive mechanism to drive the workpiece to rotate by a specific angle around a coordinate axis of the predicted coordinate system and measuring the distance change after being rotated; using the measured distance change to determine a position error; correcting the position parameters of the predicted coordinate system.

Abstract: An angle adjusting mechanism for a mouthpiece bearing portion of a telephone includes a hinge, a guiding member, a connecting member, a pushing member, a first wheel, and a second wheel. The hinge and the guiding member are fixed on opposite ends of the connecting member. The first wheel is fixed on the pushing member, and the second wheel is fixed on the mouthpiece bearing portion. The first wheel and the second wheel engage together and an end of the pushing member is connected to the guiding member. The hinge can rotate to slide the pushing member to rotate the first wheel. The second wheel turns to achieve a constant angle for the handset bed even if main body of telephone is propped up to an angle from a supporting surface.

Abstract: A data sharing method for an electronic device is provided. The method includes: downloading data from a server; broadcasting a first packet to a plurality of other electronic devices in a group to invite the plurality of other electronic devices to form a sharing tree, wherein the electronic device is the root of the sharing tree; determining, at the electronic device, whether a second packet is received from a second electronic device from amongst the plurality of other electronic devices; upon receipt of the second packet, determining whether the second electronic device can be established as a child node of the electronic device based on a predefined algorithm; establishing a connection with the second electronic device; and transmitting the data to the second electronic device.

Abstract: A Near Field Communication (NFC) device includes an NFC processing chip, a voltage conversion chip, a first transformer, and a connector. The NFC processing chip receives and transmits NFC signals. The first transformer is coupled to the NFC processing chip. The connector is coupled to the NFC processing chip and the first transformer, the connector transmits the NFC signals and transmits voltage signals to the first transformer. The first transformer transmits the voltage signal to the voltage conversion chip to supply an operating voltage to the NFC processing chip and the first transformer further transmits alternating current signals to the connector. An NFC system is also provided.

Abstract: A display system includes a display device and an HDMI dongle electrically connected to the display device. The display device includes a first transmission interface, a first control module, and a power supply module. The HDMI dongle includes a second transmission interface and a second control module. The first and the second transmission interfaces include transmission pins corresponding to each other. The first control module detects voltage of one pin to obtain matching state between the display device and the HDMI dongle and outputs an enabling signal. When the HDMI dongle matches the display device, the enabling signal controls the power supply module to transmit the power supply signal to the second control module through the first and the second transmission interfaces for charging the second control module. When the HDMI dongle does not match the display device, the power supply module is not transmitted to the second control module.

Abstract: A display apparatus with decreased thickness for displaying images includes a frame, a display panel received in the frame, a circuit module, and at least one fixing portion. The display panel displays images. The circuit module is outside of the frame, and provides signals and voltages to the display panel for driving the display module to display the images. The at least one fixing portion is used for fixing the circuit module on a surface of the frame away from the display panel. The circuit module is rotatably inserted into the at least one fixing portion.

Abstract: An anti-tamper mechanism to disable an electronic device during unauthorized physical access includes: a turnover assembly, spring, turnover member, conducting members, and a latch. The turnover body defines a plurality of receiving grooves. Several conducting members are received in the plurality of receiving spaces in a certain and predefined order to enable electrical coupling with the circuit board. The latch includes a supporting bracket, a guiding rod slidably positioned on the supporting bracket, and a latching member positioned on the guiding rod. The latching member engages with the turnover body to hold the turnover member in check, but when the latching member disengages from the turnover body in disassembly, the turnover member displaces the conducting members thereby destroying the certain and predefined order and electrical decouples the circuit board to disable the electronic device.

Abstract: An acoustic magnetic tag includes a housing, a resonant sheet, and a biasing magnetic sheet received in the main body. The housing includes a main body having an opening, a first connecting portion connected to one side of the main body, a second connecting portion connected to an other side of the main body opposite to the one side, a partition connected to the first connecting portion, and a cover connected to the second connecting portion. The partition is rotated relative to the main body to be received in the main body by folding the first connecting portion, and the cover is rotated relative to the main body to cover the opening by folding the second connecting portion. The partition is positioned between the resonant sheet and the biasing magnetic sheet.

Abstract: A light pipe for transmitting lights includes a light incident wall, a light radiation wall, a first side wall, and a second side wall, the light incident wall opposite the light radiation wall, the first side wall opposite the second side wall, the first side wall and the second side wall are connected between the light incident wall and the light radiation wall, respectively. the first side wall and the second side wall are parabolic and having focal points between the first side wall and the second side wall, the first side wall and the second side wall are parabolic making the lights passing through the light radiation wall be uniformly distributed.

Abstract: A mirror structure permitting an undistorted view of the blind spots of a vehicle include a first lens module and a second lens module. The first lens module is mounted on an A-pillar of a vehicle and located outside of the vehicle; the second lens module is opposite the first lens module and mounted inside of the vehicle on the A-pillar. The first lens module focuses light beams which would otherwise be blocked by the A-pillar of the vehicle and transmits the light beams to a front windshield of the vehicle, the light beam passing through the front windshield to reach the second lens module, the second lens module diffusing the light beams into the vision of a driver.

Abstract: A programming system includes an upper computer, a calculation module, and a first signal conversion module. The calculation module includes a second signal conversion module and a programming interface. The upper computer is configured to convert programming data into first bus signals. When the calculation module is in a normal programming state, the second signal conversion module converts the first bus signals into first clock signals and first data signals to program the calculation module. When the calculation module is in a non-normal programming state, the first signal conversion module converts the first bus signals into second clock signals and second data signals to program the calculation module. A programming method is also provided.

Abstract: A moored balloon includes a balloon, a wire coupled to the balloon, an antenna, a cable coupled to the balloon, a rotating device hung below the balloon, and a fixing device. The rotating device comprises a rotating unit and a bracket. The rotating unit comprises a bearing seat mounted on the bracket, a bearing unit mounted on the bearing seat, and a shaft passing through the bearing unit and coupled to the balloon. The fixing device comprises a receiving tube for receiving the antenna. The receiving tube is located on the bracket. The shaft moves with the balloon to generate a twisting force, the bearing unit counterbalances the twisting force to prevent the cable being twisted with the wires.

Abstract: A continuously variable transmission includes a housing, an input assembly, a driven assembly, an output assembly, and a speed changing rod. The input assembly, the driven assembly, and the output assembly are rotatably assembled to the housing. The input assembly includes a power input shaft and a first friction member fixedly sleeved on the power input shaft. The driven assembly is positioned oppositely to the input assembly. The driven assembly includes a rotation shaft and a second friction member fixedly sleeved on the rotation shaft. The output assembly includes a power output shaft and a rotational wheel non-rotatably sleeved on the power output shaft and engaging between the first friction member and the second friction member. Rotations of the first friction member and the second friction member rotate the power output shaft, a transmission ratio of continuously variable transmission is adjustable by moving the speed changing rod.

Abstract: A chassis includes a base, a number of fans mounted in the base, and an air guiding member. The base includes a bottom wall and a sidewall perpendicularly connected to a side of the bottom wall. The fans are mounted on the bottom wall. The air guiding member includes a fixing portion slidably mounted to the sidewall and a guiding portion pivotably connected to the fixing portion. The guiding portion is pivotable to adjust the direction of airflow from the fans.

Abstract: An optical network unit (ONU) includes an optical transceiver module, a switch, a detecting module, and an ONU chip. The switch is electronically coupled between the optical transceiver module and a power supply. The detecting module is electronically coupled between the switch and the power supply. The detecting module includes a sensor, an amplifier, and a comparator. The sensor is electronically coupled between the power supply and the switch to sense a driving current output from the power supply to the optical transceiver module and output a voltage signal to the amplifier, the amplifier amplifies the voltage signal and outputs an amplified voltage signal to the comparator, the comparator compares the amplified voltage signal with a predetermined voltage signal and outputs a comparison result. The ONU chip controls the switch to connect/disconnect the electrical connection between the optical transceiver module and the power supply according to the comparison result.

Abstract: A computing device connects with a measurement machine. The measurement machine includes a raster ruler and a measurement unit. The computing device reads environmental temperatures from a temperature sensor. Compensation coefficients of the standard workpiece and compensation coefficients of the raster ruler are calculated. The computing device calculates total compensation coefficients of the standard workpiece and the raster ruler. When the measurement machine measures an object workpiece, the computing device calculates a total error of the object workpiece according to the total compensation coefficients of the standard workpiece and the total compensation coefficients of the raster ruler. Coordinates of the object workpiece are calculated according to the total error and mechanism coordinates of each axis of the measurement machine.

Abstract: A switch circuit includes a voltage follower module, a comparison module and a switch module coupled to the voltage follower module, the comparison module and a power supply. The voltage follower can receive a first control signal and a second control signal. The comparison module can receive the first control signal and the second control signal. The comparison module compares a voltage of the first control signal and the second control signal with a reference voltage. When the comparison module outputs a first signal to turn on the switch module, the first power supply unit and the second power supply unit work in the first operation mode. When the comparison module outputs a second signal to turn off the switch module, the first power supply unit and the second power supply unit work in the second operation mode.

Abstract: A hand-driven mechanical screwdriver includes a holding assembly, a drive mechanism supported by the holding assembly, and a working element. The holding assembly includes a bracket and a sliding channel defined in the bracket. The drive mechanism includes a connecting element and a screw rod threadably engaged within the connecting element. An activator is rotatably connected to the connecting element and slidably positioned within the holding assembly bracket sliding channel. The working element is attached to the second end of the screw rod. When the activator is slid along the sliding channel, the connecting element moves from near the second end of the bracket towards the first end of the bracket rotating the threadably engaged screw rod and the working element attached to the screw rod.

Abstract: A server includes a chassis having a base and a cover, a switch mounted on the chassis, and a motherboard. The motherboard includes a control circuit and a power-on pin. The control circuit includes a switch unit, and the switch unit includes a first buffer, a switch chip and a jumper. When the cover is detached from the base, the switch outputs a first signal to the first buffer, and the first buffer outputs the first signal to the switch chip. The switch chip outputs the first signal to the power-on pin, and the server is powered off. When the base is covered by the cover, the switch outputs a third signal to the first buffer and the first buffer outputs the third signal to the switch chip. The switch chip outputs the third signal to the power-on pin, and the server is powered on.

Abstract: A positioning system includes an image capturing device and a light-emitting microphone. When the microphone is working, a light emitting portion of the microphone emits light. The image capturing device captures an image of an area to include the light-emitting portion with an unadjusted capturing angle and focal distance and can adjusts the capturing angle and the focal distance to obtain an adjusted image. The light-emitting portion is to be located at a preset coordinated position in the target image before adjustments are made. The image capturing device captures images including a speaker at the microphone, applying an adjusting capturing angle and an adjusted focal distance. A positioning system is also disclosed.