107results about "Discharge tube testing" patented technology

A level shift IC (3b) of a power supply/shutoff section (3) is operable, when a shutoff signal (Sa) is input from a timer circuit (8) for a time T during an ON state of a discharge lamp (7), to turn off a MOSFET (3a) so as to shut off power supply to a smoothing capacitor (4). When a detection signal (Sb) of a capacitor voltage is lowered to a value less than a reference voltage Vr1 during input of the shutoff signal (Sa), an output of a comparator (10) is changed from an H level to an L level in an inverted manner. In conjunction with this change, respective outputs of an auxiliary control circuit (12) and a NOT element (12a, 12b) are changed from an L level to an H level in an inverted manner. As a result, a current flows from the NOT element (12a) to an LED (13b) through a resistor (13a) to turn on the LED (13b). Thus, a life end of the smoothing capacitor 4 is annunciated, and a main control circuit (6) is operable to suppress an output of an inverter main circuit (5).

A power source may generate signals (RF or microwave), when driven by a drive signal from a controller. A sensor may measure the voltage and current of the signals generated by the power source, and may generate sensor signals representative of the measured voltage and current. A sampler may be configured to undersample the sensor signals, synchronously with the drive signal that drives the power source. The sampling frequency may be a scalar multiple of the fundamental frequency of the sensor signals. At RF frequencies, either synchronous undersampling or synchronous oversampling may be performed. At microwave frequencies, synchronous undersampling may be performed.

A method for testing electric motor shut-off including injecting current into an electric motor, applying at least one of a short or an open to the electric motor for a predetermined length of time, calculating the rate of decay of the current and comparing rate of the decay with a predetermined decay criteria. In one implementation, a predefined sequence of opening and short circuiting the electric motor is used, and the shut-off path tests for the motor three phases can be verified with one test.

The invention provides a detection device for street lights, which mainly detects the ballast of the street lights. The detection device consists of a detection circuit of an optical coupled voltage passing zero point, a stabilivolt source circuit, a controlling circuit with a relay, an inductance current detection circuit, a power carrier wave communication circuit and a microprocessor. The detection and controlling device adopts a simulated resistance load. When the device is used for detecting, the steps are as follows: A. the sine wave of an ac power is divided into four sections; B. the inductance current detection circuit carries out continuous sampling measurement in sequence; C. the result in the step B is subject to summation and then is compared; D. the result is transmitted to a monitoring center through the power carrier wave communication circuit. The device and method in the invention can fast and exactly detect all input and output parameters of the ballast and judge the quality of the ballast. The detection steps and the output types can be automatically combined for adapting to the measurement of different ballasts. The system error can be automatically corrected for ensuring the accuracy of the tested data.

A circuit for detecting the end of life of a fluorescent lamp is provided. In this circuit, a rectifier rectifies a voltage signal detected from a ballast. A phase detector detects the phase of the voltage signal and outputs at least one phase detection signal. A signal separator separates the rectified voltage on a phase basis to generate first and second voltage signals in response to the phase detection signal. A first maximum level detector detects the maximum level of the first voltage signal. A second maximum level detector detects the maximum level of the second voltage signal. A first comparison unit compares the first and second maximum levels and detects whether or not the difference is higher than a predetermined allowable level. A controller determines whether or not the fluorescent lamp is at the end of life in response to the detection from the first comparison unit.

A method and apparatus for detecting substrate arcing and breakage within a processing chamber is provided. A controller monitors chamber data, e.g., parameters such as RF signals, voltages, and other electrical parameters, during operation of the processing chamber, and analyzes the chamber data for abnormal spikes and trends. Using such data mining and analysis, the controller can detect broken substrates without relying on glass presence sensors on robots, but rather based on the chamber data.

The present invention provides lighting test apparatus and method of a test part of a flat panel display test unit for testing a lighting state of a flat display panel transferred from a panel supply part on a worktable. The lighting test apparatus includes a lighting test body being a square-shaped plate in which an opening is formed; a first plate installed at one side of the lighting test body; a second plate movably installed at a side of the lighting test body adjacent to the first plate; one or more sub-plates attachably/removably coupled with the first and second plates and successively coupled toward the center of the opening of the lighting test body according to a size of the flat display panel; a probe plate attachably/removably coupled with the first plate, the second plate or a subplate which is nearest from the center of the opening of the lighting test body, wherein a plurality of probes are installed at the probe plate; and position setting means for aligning an align mark on the flat display panel with a virtual reference mark to set a reference coordinate value of the worktable.

A monitoring and testing apparatus for quick-connection to a fluorescent lamp assembly includes a test circuit positioned in a casing and having wire receiving clips for quick receipt and release of wires from a ballast and lamp, whereby to electrically connect the ballast and lamp. The test circuit obtains voltage data from the ballast and lamp for evaluation indicative of operability. If either voltage data is out of a predictable range, an appropriate fault is stored in memory. When a diagnostic button is depressed by a user, the test circuit evaluates the state of the memory and energizes an appropriate LED to indicate if the ballast or lamp is inoperable. The quick-connect assembly enables a novice to correctly and quickly connect a ballast or lamps to the test apparatus and to diagnose an inoperable lamp assembly.

The invention provides a simulation testing circuit specially used for a working process of a pulse xenon lamp. The circuit mainly comprises a high-voltage power supply, a pre-ionization circuit, a main discharging circuit, a peak value detecting circuit, a feeder circuit and a control circuit, wherein the main discharging circuit is used for controlling the current pulse width and frequency through a square wave generator; the peak value detecting circuit can be used for obtaining and keeping the current peak value of the pulse xenon lamp; the feeder circuit is mainly used for comparing the preset peak value current with the practical peak value current, and inputting the signal into the control circuit; the control circuit is used for controlling the voltage of the main discharge circuit to regulate the size of the current peak value. The simulation testing circuit is mainly used for providing required pulse width and current pulse value in the working process of the pulse xenon lamp, so that people control the current pulse width of the pulse xenon lamp and achieves automation regulation effect on the pulse current peak value, and the test simulation degree of the pulse xenon lamp is improved.

The invention provides a satellite travelling-wave tube thermovacuum testing system which comprises a vacuum vessel, wherein the vacuum vessel is internally provided with a travelling-wave tube platform which is fixedly arranged on an elevating mechanism; the travelling-wave tube platform is of a hollow cavity structure; the cavity is internally provided with a heat exchange tube; the heat exchange tube is connected with a refrigerating unit through a coolant pipeline; and the refrigerating unit is positioned outside the vacuum vessel. According to the satellite travelling-wave tube thermovacuum testing system provided by the invention, a travelling-wave tube exchanges heat with the travelling-wave tube platform through a heat conduction mode, so that the heat exchange efficiency between the travelling-wave tube platform and a test piece is greatly improved, The travelling-wave tube cooling time is reduced, and one technical problem in a satellite travelling-wave tube thermovacuum testing process is solved.

A test apparatus for a liquid crystal display device includes: a stage having a substrate thereon; a plurality of light emitting diodes (LEDs) on the stage and supplying a light to the substrate; a heating nozzle supplying a hot air to the substrate; a needle applying a test signal to the substrate; and a microscope inspecting the needle and the substrate.

The invention relates to measuring device for direct current breakdown voltage of a gas discharge tube and a method thereof, the measuring device comprises a man-machine interaction parameter setting and measuring result display unit, a microcomputer controlling and measuring unit, an adjustable rise speed DC power source, a current-limiting unit, gas discharge tube load, a microcurrent differential sensor and a voltage sensor, wherein, the man-machine interaction parameter setting and measuring result display unit is composed of a liquid crystal and a keyboard. In the invention, the microcurrent differential sensor is adopted to rapidly and accurately judge a microcurrent conversation signal of the gas discharge tube from an insulation state to a conducting state under the condition that the gas discharge tube is applied with DC voltage in a stated rise speed, wherein, the amplitude of the microcurrent conversation signal is less than 1mA; an A/D collection circuit with high-precision peak holding and high resolution is adopted to realize accurate measurement of the direct current breakdown voltage of the gas discharge tube, wherein, the metering precision is higher than 0.5%; and rapid extraction of a microcurrent signal reduces consumption of the DC voltage on an emission material on the surface of the electrodes of the gas discharge tube, and the inconsistency for measuring the direct current breakdown voltage of the gas discharge tube is lower than 0.5%.

The invention discloses a system for monitoring the life of a street lamp tube, which includes a ballast system and a remote control dispatch center. The ballast system includes a ballast inductor L1 connected to the lamp tube, a compensation capacitor C5 and a high-voltage starter; the remote control dispatch center passes The communication network is connected to the voltage detection circuit set at both ends of the lamp tube. When the high-pressure gas discharge lamp is working, there will be a fixed tube voltage at both ends of the lamp tube. After the voltage is divided by the voltage dividing capacitor C1 and the voltage dividing capacitor C2, the voltage regulator Z1 will divide the voltage. Clamp at a fixed value to protect the voltage detection circuit from being damaged. The detection circuit composed of detection diode D1, resistor R1 and filter capacitor C3 converts the divided high frequency and low voltage into DC voltage V1, and the remote control dispatching center will The DC voltage value is compared with the preset voltage value to judge the life of the lamp tube. When the service life of the lamp tube is about to expire, the remote control dispatching center will timely report the detected lamp life information so that relevant personnel can deal with it in time.

A device and a method for detecting a crowbar circuit in a wind turbine are provided, wherein the wind turbine comprises a converter electrically connected to the crowbar circuit, and the method comprises: electrically coupling a detection module to the crowbar circuit; inputting a first control signal into the crowbar circuit, to turn on the crowbar circuit; providing a three-phase voltage signal to the crowbar circuit via the converter, wherein voltage signals in any two adjacent phases has a predetermined phase angle difference; reading the first detection signal outputted by the detection module, to determine whether the crowbar circuit is normally thrown into the wind turbine; inputting a second control signal to the crowbar circuit, to turn off the crowbar circuit; and reading again the second detection signal outputted by the detection module, to determine whether the crowbar circuit is normally cut out from the wind turbine.

The invention relates to a tube pressure simulation type shock wave detection device. The shock wave detection device comprises a switching power supply, a trigger, a pressure probe, a test desk, an oscilloscope, a shock wave generator and a trigger switch. The shock wave detection device has the advantages of stability and reliability, the shock resistant performance of different tubes can be detected, dynamic situations of xenon lamp discharge can be preferably simulated, and the rapid pressure change can be accurately caught.

The invention provides an exposure device capable of inspecting whether a discharge lamp as a light source is a quality product or not in exposure apparatus such as a printed wiring substrate and a method for inspecting the exposure device. The exposure device (100) includes: one or more light source devices (4) including discharge lamps (1), a filament lamps (2) and a reflector containers (3); a frame (5) for installing the light source devices (4); a constant current power supply (8) for supplying current to the filament lamps (2); a switch (10) for turning on-off the current from the constant current power supply (8); a control unit (9) for turning on-off the switch (10) during a designated period; a measurement unit (11) for measuring the voltage of the filament lamps (2); a comparison unit (12) for comparing the voltage and a specified voltage range; a determination unit (13) for using the comparison result to determine if the discharge lamps (1) are quality products or not; and a display unit (14).

A test circuit for discharge time of a lamp is used for recording the discharge time of the lamp and comprises a timing module and a photosensitive control module. The timing module is used for recording the discharge time of the lamp. The photosensitive control module is used for controlling timing state of the timing module and connected with the timing module. If the photosensitive control module senses the lamp discharging, the timing module is controlled to start to time by the same; if not, the timing module is controlled to stop timing by the same. The test circuit for the discharge time of the lamp adopts the photosensitive control module to sense the discharge state of the lamp. When the lamp is in discharging, the photosensitive control module is conducted; when the lamp stops discharging, the photosensitive control module is cut-off. The timing module is connected with the photosensitive control module and controlled by the conducting state of the same. when the photosensitive control module is conducted, the timing module starts to time; when the photosensitive control module is cut-off, the timing module stops timing. Thus, the accurate discharge time of the lamp is recorded by adopting the test circuit with simple structure.

The invention relates to a service life detection apparatus of a UV lamp and a detection method thereof. The apparatus comprises a UV lamp, a UV lamp operating current detection module, a control circuit and a replacement warning module; and the UV lamp, the UV lamp operating current detection module, and the replacement warning module are connected with the control circuit electrically. Because the operating current of the UV lamp can reflect whether the UV lamp is in a normal state, the UV lamp operating current detection module obtains the operating current information and compares the information with a set parameter in the control circuit to analyze whether the service life of the UV lamp is reached; if the service life is reached, the control circuit sends an instruction to the replacement warning module and the replacement warning module carries out warning to warn the user to replace the UV lamp, so that functions of the UV lamp can be realized. According to the UV lamp service life detection scheme, whether the service life of the UV lamp is reached can be reflected accurately. When the apparatus is applied to a water purifier, drinking water security for the user can be guaranteed and an effect of maximum utilization can be realized.