Abstract: An antenna device includes a base, an adjusting pole, an installing apparatus, a supporting pole, an antenna installed to a first end of the supporting pole, and a balance apparatus installed to a second end of the supporting pole. The installing apparatus defines an installing hole along the horizontal direction. A first pressure sensor and a second pressure sensor are respectively installed in two opposite ends of the installing hole. The supporting pole is slidably received in the installing hole to abut against both of the first and second pressure sensors. The balance apparatus includes a controller electrically connected to the first and second pressure sensors and a motor. The controller controls the rotation direction of the motor according to pressures applied on the first sensor and the second pressure sensor, so that the balance apparatus moves along the supporting pole, until the pressures are the same.

Abstract: An antenna holding device for holding test antennas includes a base, a first mounting pole, a second mounting pole, a guiding pole and an adjusting pole. The first mounting pole and the second mounting pole are mounted on the base. The guiding pole is mounted on the base and positioned between the first mounting pole and the second mounting pole. The adjusting pole is slidably and rotatably attached to the first mounting pole and the second mounting pole, and is slidably attached to the guiding pole.

Abstract: A motion sensing device includes a sensing chamber including at least one group of sensing surfaces, a signal generator, a sensing body and at least one elastic assembly corresponding to each group of the sensing surfaces. Each group of sensing surfaces includes two opposite sensing surfaces. The signal generator is electrically connected to the sensing surfaces and transmits different control signals to each sensing surface. Each elastic assembly includes two elastic members. One end of each elastic member secured to the sensing surfaces, and another end of each elastic member secured to the sensing body. The motion sensing device is shaken, the sensing body contacts with the corresponding sensing surface and transmits the control signal.

Abstract: A testing system includes a signal emitter, a signal collection apparatus, and an analyzer. The signal emitter emits electromagnetic signals to cause electromagnetic interference in an electronic device. The signal collection apparatus collects the signals outputted by the target electronic device and includes a light emitter and an optical fiber. The analyzer is electronically connected to the signal collection apparatus. The light emitter emits light beams which reproduce the signals collected by the signal collection apparatus, and optical fiber transmits the light beams to the analyzer, the analyzer receives the light beams and reconstitutes the original electrical signals, and analyzes determines the electronic device performance while being subjected to the electromagnetic interference.

Abstract: An electronic device includes a handwriting pen and a main body. A gyroscope senses movement information of the handwriting pen and outputs the movement information to a controller. The controller converts the movement information into electrical signals and outputs the electrical signals to the main body through a signal transmitting module. A processor receives the electrical signals through a signal receiving module and the signal transmitting module, converts the electrical signals into movement information, and outputs the movement information to a character identification module. The character identification module converts the movement information into a corresponding character, and controls the display unit to display the character.

Abstract: An electromagnetic anechoic chamber includes an anechoic chamber and a supporting bracket. A sidewall of the anechoic chamber defines an opening. The supporting bracket includes a shielding piece rotatably mounted to the anechoic chamber to cover the opening, and two test benches respectively fixed to two opposite side surfaces of the shielding piece. When an item of information technology equipment (ITE) is assembled to one of the test benches and the supporting bracket is rotated to make the shielding piece cover the opening and the ITE enter the anechoic chamber, the other test bench is exposed out of the chamber and another piece of ITE can be assembled thereon.

Abstract: An audio monitoring device for testing an audio device is provided. The audio device is placed in a shielding room which contains a signal emitter. The signal emitter emits electromagnetic waves which electronically interfere with the audio device. The audio monitoring device includes a sound collector, a sound transmitting tube, and a sound outputting element. The sound collector is positioned in the shielding room and collects sounds from the audio device produced whilst being subjected to the electromagnetic interference issued by the signal emitter. The sound transmitting tube has one end connected to the sound collector and the other end exposed from the shielding room, to connect to the sound outputting element. The sound transmitting tube transmits the sounds collected by the sound collector to the sound outputting element for analysis.

Abstract: A cleaning system for solar panels includes first and second cleaning units, first and second control units, first and second power measuring units to measure a first power outputted from a first solar panel per interval of time and a second power outputted from a second solar panel per interval of time, and a processing unit. The processing unit reads the first and second powers and the first and second coefficients, and determines whether the second power is less than a product of the first power, the first coefficient, and the second coefficient. When the second power is less than the product, the processing unit outputs a control signal to the second control unit. The second control unit controls the second clean unit to clean the second solar panel.

Abstract: A monitoring device includes a sensing element, a first switch element, a second switch element, and a warning unit. Brightness of a screen on a display unit is sensed by the sensing element. When the brightness of the screen on the display unit is not greater than a predetermined brightness, the first switch element will be turned on to turn on the second switch element so that the warning unit can be activated. Therefore, the display state of the screen can be monitored automatically.

Abstract: An electromagnetic radiation measuring device includes a test antenna module and a main processor electrically connected to the test antenna module. The test antenna module includes a plurality of pre-test antennas and at least one final test antenna, which have predetermined polarities and are positioned at predetermined heights, respectively. The pre-test antennas and the final test antenna respectively receive wireless signals sent from an electronic device. The main processor measures and records a frequency of the strongest wireless signal received by selected ones of the pre-test antennas that have the same polarity, and further determines whether power of wireless signals at the recorded frequency received by the final test antenna polarized to have the same polarity as that of the selected ones of the pre-test antennas exceeds a predetermined acceptable range.

Abstract: An electromagnetic anechoic chamber includes a support board, a cover, and a number of adjustable boards. The support board defines an opening. The cover covers the support board to form a test chamber between the cover and the support board, electromagnetic wave absorptive material spread on the support board and an inner surface of the cover. Each of the adjustable boards includes an electromagnetic wave absorption layer disposed on one surface thereof and a electromagnetic wave reflection layer disposed on an opposite surface thereof, and is rotatably mounted on the support board and received in the opening to selectively allow the electromagnetic wave absorption layer or the electromagnetic wave reflection layer being inward the test chamber.

Abstract: An antenna holding device for holding test antennas includes a base, a holding pole, a sleeve unit, and a support pole. The holding pole is perpendicularly mounted on the base. The sleeve unit includes a movable sleeve, and the movable sleeve slidably and rotatably mounted on the holding pole. The support pole is mounted on the sleeve unit for mounting the test antennas.

Abstract: A holding device for holding test antennas includes a base, a sliding plate, a holding pole, and a support block. The sliding plate is slidably mounted on the base. The holding pole is fixed on the sliding plate, and a length of the holding pole is adjustable. The support block is fixed on the holding pole and configured for receiving the test antennas. The holding pole and the sliding plate change a position of the support block along a first axis and a second axis, respectively.

Abstract: A magnetic field generator includes a holding unit, an induction winding, and an operation unit. The induction winding is slidably and rotatably mounted on the holding unit. The operation unit is electrically connected to the induction winding, and positioned in a predetermined distance away from the induction winding. The operation unit provides current to the induction winding, and the induction winding generates magnetic field in response to receiving the current from the operation unit.

Abstract: An electrostatic discharge testing (ESD) apparatus includes a platform, a control unit, an ESD gun, an X rod, a Y rod, and a Z rod respectively parallel to designated XYZ axes of the platform. The Z rod is slidably disposed on the X rod via a first sliding joint, and the Y rod is slidably disposed on the Z rod via a second sliding joint. The ESD gun is disposed on the Y rod. The control unit controls the Z rod to slide along the X rod, and controls the Y rod to slide along the Z rod and along an axis of the Y rod, according to a predetermined testing program. Thus, the ESD gun is moved along a working path to test a product.

Abstract: An electromagnetic interference (EMI) test system with self-checking function for detecting electromagnetic interference includes a signal source, a line impedance stabilization network (LISN), a coupling decoupling network (CDN), an impedance stabilization network (ISN) and a receiver. The signal source provides an electronic signal, the LISN separates interference signal from the electronic signal. The CDN outputs a coupling signal, and the ISN separates interference signal from the signal from the CDN. The receiver figures out current signal strength of each frequency points of the signal from the ISN and compares the current signal strength with a reference value to determine whether the EMI test system works normally according to the comparison.

Abstract: An electromagnetic radiation measuring device includes a test antenna module and a main processor electrically connected to the test antenna module. The test antenna module includes a plurality of pre-test antennas and at least one final test antenna, which have predetermined polarities and are positioned at predetermined heights, respectively. The pre-test antennas and the final test antenna respectively receive wireless signals sent from an electronic device. The main processor measures and records a frequency of the strongest wireless signal received by selected ones of the pre-test antennas that have the same polarity, and further determines whether power of wireless signals at the recorded frequency received by the final test antenna polarized to have the same polarity as that of the selected ones of the pre-test antennas exceeds a predetermined acceptable range.

Abstract: A test box for electrostatic generators includes a housing and an electrostatic target. The housing is structured to define a shielded space for receiving a measuring device and is further structured to prevent outside electromagnetic radiation from entering the shielded space. The electrostatic target is mounted on an outside surface of the housing and electrically connected to the measuring device. Electrostatic signals emitted from the electrostatic generators are received and transmitted to the measuring device by the electrostatic target, thereby displaying waveforms of the electrostatic signals using the measuring device.

Abstract: An antenna bracket includes two substrates having a bottom surface and a supporting surface; a plurality of movable rollers installed on the bottom; two columns, respectively set up on the supporting surface of the substrates; a beam with two ends movably connected with the two columns; two first driving members, fixed on each supporting surface and connected with the beam to drive the beam to slide upward and downward relative to the two columns; an antenna base, movably connected with the beam to install an antenna; a second driving member, fixed on the beam and connected with the antenna base, to drive the antenna base to slide horizontally; two first electromagnetic shield covers and a second electromagnetic shield cover respectively covering the two first driving members and the one second driving member, to attenuate electromagnetic interference (EMI) emanation from openings in the first driving members and the second driving member.

Abstract: A load regulation circuit used for calibrating a voltage drop tester includes a voltage control switch, a first resistor group, a power control switch and a second resistor group electrically connected to the first resistor group through the power control switch. When the voltage control switch is switched on to different positions, the first resistor group provides different loads and load voltages for the voltage drop tester. When the power control switch is turned on or off, the first resistor group and the second resistor group provide corresponding loads and load powers for the voltage drop tester to calibrate and correct operating parameter of the voltage drop tester. The load regulation circuit can simulate and replace different electronic device to calibrate the voltage drop tester.