38results about How to "Adequate response time" patented technology

The present invention relates to a device for accomplishing noise reduction in a photoacoustic gas detector using a sound damping element and/or a background or reference microphone where a preferably larger external volume that acts as a sound damping element (SDE) is coupled to a smaller volume through which the gas diffuses. The coupling is accomplished in such a way that the externally generated sound waves incident upon the photoacoustic detector are adequately attenuated by the larger volume SDE without adversely affecting diffusion of the gaseous species of interest through the smaller volume for measurement by the detector. Preferably this is accomplished by coupling the larger SDE volume to the smaller gas diffusion volume by a long and thin pressure channel. Another photoacoustic detector includes a measuring system to measure the photoacoustic excitation of analyte gas entering the photoacoustic detector, a reference system to measure the effect of pressure waves in the environment, and a system for offsetting an output from the measuring system with an output from the reference system to reduce noise resulting from pressure waves in the environment in an output signal of the photoacoustic detector. The present invention also relates to a device for testing the integrity of a porous member and includes a source of pressure waves and a sensor for measuring a signal resulting from the transmittal of pressure waves from the transmitter. The signal is proportional to pressure losses through the porous member. The pressure losses through the porous member are, in turn, a measure of the degree to which the porous member has become clogged.

A controller with protection function, comprising a feedback circuit, a logic control circuit, an over-state judgment circuit, and a protection control circuit, is disclosed. The feedback circuit generates a modulation signal according to an output of a converting circuit. The logic control circuit is coupled to the feedback circuit and controls the converting circuit according to the modulation signal for stabilizing the output of the converting circuit. The over-state judgment circuit receives an over-state reference signal and a detecting signal, and generates a protection signal in response to levels of the detecting signal and the over-state reference signal. The protection control circuit is coupled to the logic control circuit and the over-state judgment circuit and controls the logic control circuit to lower the output of the converting circuit when receiving the protection signal.

A fiber-based optical pressure-sensor, made using semiconductor nanocrystal quantum dots (NQDs) as the active transducing material, provides response time fast enough for shock wave measurements. For NQDs, the shift in band gap as a result of applied pressure can be observed as a shift of the photoluminescence (PL) peak. Further, the shift of the principal absorbance feature allows pressure measurements faster than those obtainable by following the PL peak.

A color sequential liquid crystal display (color-sequential-LCD) and an LCD panel driving method thereof are disclosed. By changing the arrangement of the pixel array in the LCD panel and turning on several rows of pixels in the LCD panel at the same time, so that the color sequential LCD of the present invention not only respectively reduces the scanning time of red, green and blue video data to make the liquid crystal molecules of all the pixels on the LCD panel have enough response time but also respectively increases the lighting-up time of the red, green and blue light emitting diodes of the back light module to promote the display brightness of the entire LCD panel. Therefore, the color sequential LCD of the present invention displays a single color or a full color image without the bottom color mixing phenomenon, and furthermore, the display brightness thereof can be promoted.

An image display system produces a color image by arranging a color shutter capable of time-divisionally switching a plurality of colors to be displayed, in front of a monochrome image display. This image display system comprises: a self-luminous image display part for time-divisionally displaying monochrome images corresponding to three primary colors; and a color display part for time-divisionally coloring and outputting the monochrome images which formed on the side of the light outgoing surface of the self-luminous image display part and which correspond to the three primary colors. The color display part further comprises: a liquid crystal cell driven by carrying out an optical switching on the basis of the inversion between positive and negative polarities; a transparent electrode formed by dividing the liquid crystal cell into a plurality of parts; and a liquid crystal color shutter capable of optionally setting display colors for a plurality of display regions by means of the transparent electrode, the liquid crystal color shutter displaying different display colors for at least two display regions in an optional time in a driving condition.

A parking lot sensor includes a sensor for scanning a parking space for a vehicle. A method for controlling the parking lot sensor includes steps of determining an activity of vehicles in the parking lot, of determining a scanning frequency on the basis of the activity and of controlling, as a function of the scanning frequency, the sensor respectively for carrying out a scan.

The invention relates to the technical field of heat exchange, and relates to a refrigerant cooling system with high temperature stability. The system comprises a variable-frequency compressor, a condenser, a radiator and a phase-change energy storage unit, wherein the radiator is in contact with heat generating components, and the phase-change energy storage unit is arranged on the radiator; thephase change energy storage unit comprises a high-temperature phase-change material, a medium-temperature phase-change material and a low-temperature phase-change material which are not less than three phase change points in different temperature areas; the high-temperature, the medium-temperature and low-temperature phase-change materials are made of non-metal materials and are correspondingly and independently arranged on the radiator; the phase-change temperature of the medium-temperature phase-change material is the working temperature of the radiator; and a refrigerant pipeline and a coldmedium flowing through the refrigerant pipeline are arranged in the radiator. According to the refrigerant cooling system with high temperature stability, the refrigerant cooling technology and the phase change energy storage technology are organically combined, phase change materials with three or more than three phase change points in different temperature zones are used, multiple temperature buffering and temperature control signals are provided, the temperature runaway risk is reduced, and the problem that a traditional refrigerant cooling system is insufficient in temperature stability when the loss is changed is solved.

The invention provides a rail transit monitoring system and method. The system comprises a plurality of monitoring alarm terminals, a data exchange module and a vehicle-mounted terminal which are arranged along a track; each monitoring alarm terminal comprises a plurality of image acquisition modules, a plurality of light alarm modules and a first processing module; all the first processing modules are connected and communicated through the data exchange module; each first processing module is used for identifying whether foreign matter invasion exists in the image output by an image acquisition module or not, and transmitting an alarm signal to the first processing module of the monitoring alarm terminal in front of or behind the monitoring alarm terminal when the foreign matter invasionexists, so that the light alarm module in a first distance range in front of or behind the monitoring alarm terminal sends a light alarm signal; the vehicle-mounted terminal comprises an optical receiver located at the head of the train and a second processing module. The system sends out a light alarm signal through each light alarm module, does not depend on a signal system to transmit the alarmsignal, and can still effectively transmit the alarm signal and improve the driving safety when a signal communication system breaks down or in a tunnel or other scenes with poor communication quality.

A method for controlling a parking lot sensor, which includes a sensor for scanning a predetermined measuring area, includes steps of determining an expected fluctuation of vehicles in the measuring area, of determining a scanning frequency on the basis of the expected fluctuation and of controlling, as a function of the scanning frequency, the sensor respectively for carrying out a scan.

To produce a temperature sensor, in which a conductor track (42), which has at least 100 Ohm and is made of platinum, is connected via contact fleids (41) to two conductor tracks (12, 16) made of copper, and in which the conductor track (42) made of platinum, which is implemented ifl thin-film technology as a platinum track that is at least 10 mm long, 3 to 50 pm wide and 0.1 to 5 pm thick on a rectangular surface area measuring 1 to 10 mm of a 0.1 to 1 mm thick ceramic plate (40), transitions at its two ends into contact fleids (41) that are 20 to 500 times wider, according to the invention these two widened fields (41) ifl the interior of these fleids (41) are structured, a metal paste is applied to the two internally structured flelds, and the metal paste is burned ifl, whereby the thick film (3) / pad, which is generated from the paste, contains an oxidic component and is fixed to the oxidic surface of the ceramic plate (40) which is freely accessible due to the internal structure of the contact fields (41).

The invention provides a sequential mold opening lock catch mechanism and a sequential mold opening injection mold. The sequential mold opening lock catch mechanism comprises a buckle machine base, abuckle machine block, a buckle machine shifting rod and a buckle machine hook, and the buckle machine block is movably mounted on the buckle machine base so as to have a locking position locked on thebuckle machine hook and a releasing position for releasing the buckle machine hook; the button machine block is defined as a locking direction from a releasing position to a locking position; a shifting rod groove is formed in the buckle machine base, the buckle machine shifting rod is inserted into the shifting rod groove, and an abutting part for fixing the buckle machine block at the locking position is further arranged on the buckle machine shifting rod; and the tail end, away from the locking direction, of the buckle machine shifting rod is bent to form an elbow structure. The buckle machine block is fixed at the locking position through the abutting part of the buckle machine shifting rod, the buckle machine block is released through the elbow structure at the end part in the mold opening process, the unlocking is realized, the locking state of a buckle mechanism has no play gap, and the problems of poor stability and prone to running failure of an existing buckle mechanism aresolved.

The invention belongs to the field of anti-shaking devices and discloses an anti-shaking buffer device. The anti-shaking buffer device comprises a connector, a mounting joint and a joint for connecting the mounting joint with the connector; the connector is hinged to the upper end of the joint through a first pivot; the mounting joint is hinged to the lower end of the joint through a second pivot;and the first pivot and the second pivot are arranged horizontally and are distributed in a crossed manner in respective axial directions in space. Thus, under the bumpy condition, when the upper endof the joint is inclined upwards around the first pivot, the mounting joint can rotate downwards around the second pivot under the gravity effect of external equipment and can be kept downward, so that the transient stability of the equipment can be realized; and the first pivot and the second pivot are distributed in the crossed manner, thus the angle of the joint and the angle of the mounting joint are inconsistent, the swinging resistance is further increased, the mounting joint is better kept in the vertical state, and the intelligent anti-shaking effect of the front-end equipment is remarkably improved.

The three-phase synchronous rectifier for battery charger on board vehicle comprises: three rectification units provided with respective inputs connected to respective phases of a permanent magnet generator and with respective outputs connected to a battery of a vehicle; wherein the rectification units are configured to receive at input respective phase currents of the generator and to supply at output rectified currents; and wherein each of the rectification units comprises a current sensor connected to a respective phase of the generator and a respective output circuit connected to the battery and operatively connected to said current sensor; the current sensor being configured to receive at input a respective phase current and the output circuit being configured to be piloted by means of the current sensor to generate the rectified currents; wherein the current sensor comprises at least one toroidal element made of a magnetic material crossed by a lead which conveys the phase current and at least one Hall effect sensor connected to the toroidal element and to the output circuit.