45results about How to "Easy to zero" patented technology

A desired acoustic signal is extracted from a noisy environment by generating a signal representative of the desired signal with processor (30). Processor (30) receives aural signals from two sensors (22, 24) each at a different location. The two inputs to processor (30) are converted from analog to digital format and then submitted to a discrete Fourier transform process to generate discrete spectral signal representations. The spectral signals are delayed to provide a number of intermediate signals, each corresponding to a different spatial location relative to the two sensors. Locations of the noise source and the desired source, and the spectral content of the desired signal are determined from the intermediate signal corresponding to the noise source locations. Inverse transformation of the selected intermediate signal followed by digital to analog conversion provides an output signal representative of the desired signal with output device (90). Techniques to localize multiple acoustic sources are also disclosed. Further, a technique to enhance noise reduction from multiple sources based on two-sensor reception is described.

The invention provides an antifreeze water meter box easy to install and dismantle. The antifreeze water meter box comprises a water meter box casing, protruded limiting barrels are fixedly arranged on the outer side surfaces of through holes in the two sides of the water meter box casing, semicircular rubber clamp rings are disposed at the inner upper ends and the inner lower ends of the protruded limiting barrels, a heating pipe is mounted in a cavity inside a mounting base plate, two side ends of a water meter body are fixedly clamped in arc-shaped grooves in the surface of a supporting plate through arc-shaped clamping plates, the middle of the upper surface of the water meter box casing is provided with an observation notch, and the surface of an eaves edge at the upper end of the observation notch is matched and connected with a thread cap. Two side ends of a water meter are fixed into arc-shaped grooves in the surface of the supporting plate through bolts II and two groups of arc-shaped clamping plates, the water meter can be mounted in the water meter box casing quickly and stably, the two groups of semicircular rubber clamp rings tightly clamp a water inlet pipe and a water outlet pipe, cold air can be prevented from entering the water meter box casing through slits of the through holes, and when the outdoor temperature is too low, the heating pipe is started, so thatthe water meter can be effectively prevented from being frozen.

The invention provides an efficient waste water and gas online monitoring device capable of collection in multiple places. The device comprises a detection cabinet, a water filtering box is arranged on the left side of the detection cabinet, and a cylindrical inner groove is formed in the middle of the lower surface of the water filtering box; air bags are fixedly mounted on the outer side surface of the upper end of the water filtering box, water inlets are formed in the upper end surface of the left side of the detection cabinet, and a water outlet pipe is communicated with the water inlets; a flow divider is connected to the lower ends of collection tubes in a communicated mode, and multiple sets of waste water collection tubes are connected to the lower end surface of the flow divider in a communicated mode. According to the efficient waste water and gas online monitoring device capable of collection in multiple places, the water filter box floats on different portions of a waste water pool so that waste water of each place can be collected, a hairbrush cylinder rotates so that it can be guaranteed that filter holes are not blocked by large particle impurities, the flow divider is used for dividing the waste water into multiple groups, and the waste water is poured into the waste water collection tubes; analysis ends conduct alone corresponding detection on the waste water in the waste water collection tubes, so that the efficiency of waste water detection is improved; meanwhile, waste gas can be exhausted into an air pipe through an exhaust fan and is analyzed through a gas detector on the lower surface of the air pipe.

The invention relates to a gas measuring device and method. The gas measuring device comprises a measuring gas chamber and a reference gas chamber, wherein the reference gas chamber is used for encapsulating a zero-reference gas; and a circuit on the gas measuring device is symmetrically provided with sensors which correspond to the reference gas chambers. The gas measuring method comprises the step of automatically carrying out regular zero calibration by utilizing a zero-reference signal acquired by the sensor arranged corresponding to the reference gas chamber. The gas measuring device and method does not need to carry out the regular zero calibration based on an externally input zero-reference gas, thereby ensuring that the standard of gas measurement is more accurate and then ensuring the accuracy of the gas measurement.

The invention relates to a magnetostrictive displacement sensing flowmeter. The magnetostrictive displacement sensing flowmeter comprises a sensor electronic bin, a transitional joint, a groove cover, an overflow groove, a metering barrel, a valve block, a damping washer, a straight joint, a measuring wave guide tube and a magnetic ring buoy. The magnetic ring buoy is driven to move in the up-down direction by change of the liquid level of leakage oil, a magnetostrictive effect of a magnetostriction material is achieved, the measuring wave guide tube deforms elastically so that a mechanical wave which is expanded towards two sides is generated, the mechanical wave is received by the sensor electronic bin which is connected with the upper end of the measuring wave guide tube and is converted into an electric signal, and the volume flow of the leakage oil is calculated by comparison and conversion. Owing to the magnetostrictive effect, the magnetostriction property of the magnetostrictive displacement sensing flowmeter is not changed along with time. The magnetostrictive displacement sensing flowmeter has the advantages of high stability, high reliability, high response speed, high resolution precision, non-contact measurement, zero abrasion, long service life and the like. Moreover, the magnetostrictive displacement sensing flowmeter is particularly suitable for measuring micro flow.

The invention relates to an electronic zero adjust method of optical-electricity shaft encoder in the field of optical-electricity measuring. First designing a electronic zero adjust circuit which comprises a memory storage device, a reset switch, a upper-pulling resistance and a signal chip computer, wherein the memory storage device possesses chip choosing end CS, clock interface SK, writing end DI and output end DO; one end of the reset switch is connected with the earth, the other end is connected with the P1 port; the upper-pulling resistance is positioned on the P1 port, the other end of the upper-pulling resistance is connected with the 5V power; the signal chip machine possesses input/output (I/O) interface P1 to P5, P1 is connected with the resistance end of the reset switch; P2 to P5 are separately connected with the chip choosing end CS, the clock interface SK, the writing end DI and the output end DO; second controlling the electronic zero adjust circuit by the preset electronic zero adjust program to achieve the clear impact.

The invention discloses a high-precision withdrawal and straightening machine roller zero calibration device and method, and the device comprises a main spirit level, a main spirit level and upper roller surface contact precise adjustment mechanism, a level, and a connecting rod. A horizontal rod of the connecting rod is detachably connected with the left end of the main spirit level, and the lower end of a vertical rod of the connecting rod is connected to a bearing seat of a lower roller through an adjustable mechanism, wherein the level is placed on the main spirit level. The method comprises the steps: connecting and fixing the connecting rod and a screw rod; pre-tightening and fixing the main spirit level and the connecting level; precisely adjusting the main spirit level to be horizontal; taking away the level, and enabling the lower roller to slowly rise till a top cover on the main spirit level of the device to contact with the surface of an upper roller, and then stopping the lower roller; observing the rising scale of a water column, reading a value and determining a final zero calibration value; calculating and obtaining the zero calibration data of a pair of rollers, and enabling the zero calibration data to be inputted into a computer. The device and method can achieve the quick, accurate and convenient zero calibration of a roller gap, prolongs the service life of a withdrawal and straightening machine roller, and improves the scale breading effect.

The invention discloses a dual-purpose medical device for household eye cleaning and dripping. For the first conduit and the second conduit, the lower ends of both sides inside the device box are fixedly provided with first elastic hollow liquid storage balls, and the upper ends of both sides inside the device box are fixedly provided with second elastic hollow liquid storage balls. The present invention presses the first pressure plate with fingers, sprays the sterile saline solution from the first conduit to clean the eyes, and lightly presses the second pressure plate to drip the eye drops from the first conduit into the eyes, realizing the ability to drop eye drops immediately after cleaning the eyes The function of eye drops can adjust the pressing force through personal feeling, thereby adjusting the liquid volume, improving the effect of washing drops, and improving the safety of cleaning drops through the protective effect of the cone-shaped eye mask tube.

The invention discloses an engine cylinder hole seal groove diameter gauge. The engine cylinder hole seal groove diameter gauge comprises a gauge main body 1, a cam adjusting mechanism 2, a connecting rod mechanism 3, a measuring rod mechanism 4, a bearer 5 and a dial gauge 6. The top of the gauge main body 1 is provided with an upper mounting disc 11, the bearer 5 is fixedly installed on the upper mounting disc 11, the dial gauge 6 and the cam adjusting mechanism 2 are installed on the bearer 5, a lower mounting disc 7 is welded on the bottom of the gauge main body 1, the lower mounting disc 7 is provided with a mounting groove 71 arranged in the horizontal direction, the measuring rod mechanism 4 is movably installed in the mounting groove 71, two ends of the connecting rod mechanism 3 are respectively connected with the upper mounting disc 11 and the lower mounting disc 7 in a rotatable manner, and the dial gauge 6 is connected with the measuring rod mechanism 4 through the connecting rod mechanism 3. The engine cylinder hole seal groove diameter gauge is used for detecting the engine cylinder hole seal groove diameter, and is advantaged by being simple in structure, low in manufacture cost, convenient to operate and high in measuring precision.

A metal detector has a large primary transmit coil, a small primary feedback bucking coil, a first receive coil, and a second receive coil. A variable resistance device is connected to the first and second receive coils. A voltage source is connected to the large primary transmit coil. The voltage source is oppositely connected to the small primary feedback bucking coil. A primary voltage is provided to the large primary transmit coil. A reverse primary voltage is provided to the small primary feedback bucking coil. The small primary feedback bucking coil is positioned near the first and the second receive coils. The metal detection methods and apparatus sums up the signals from the two secondary coils. One is over nulled, the other is under nulled. They are close enough to an inductive null to attenuate the stray coupled signals from the primary driving signal and detecting the object.

The invention discloses a filter which comprises a filter body embedded in a wall, the filter body comprises an air inlet box section, a first-stage filter box section, an aerosol injection section, a second-stage filter box section and an air outlet box section which are sequentially connected from bottom to top, and the aerosol injection section is provided with a first aerosol dust generating pipe used for injecting aerosol particles; the air outlet box section is provided with an air outlet, and a sealing valve plate device is installed on the air outlet and used for sealing or opening the air outlet; a filter element module, a pressing mechanism for pressing the filter element module and a point-by-point scanning leak detection mechanism positioned at the downstream of the filter element module are mounted in each of the first-stage filter box section and the second-stage filter box section; and the point-by-point scanning leak detection mechanism is used for performing point-by-point scanning detection on aerosol particles injected into the upstream of the respective filter element module. The filter has the advantages of multiple functions, high safety level, double filtering effect and reliable air tightness.

The invention discloses a sickbed lifting angle measuring device convenient for reading. The sickbed lifting angle measuring device comprises a fixed plate, a movable plate, a pointer, a lifting mechanism, a lifting plate, an angle indicating dial and a fixing piece, wherein the movable plate is rotatably mounted on the fixed plate, the angle indicating dial is fixed on the fixed plate, and the center of the angle indicating dial is positioned on the rotating axis of the movable plate; the middle part of the pointer is rotatably mounted on the angle indicating dial; the rotating axis of the pointer coincides with the rotating axis of the movable plate, one end of the pointer extends to the scale line of the angle indicating dial, and the other end of the pointer is fixed on the lifting plate through the fixing piece; and the lifting mechanism is arranged between the movable plate and the lifting plate and is used for driving the lifting plate to move close to or away from the pointer.The sickbed lifting angle measuring device convenient for reading provided by the invention is simple in structure, the pointer is convenient to zero, and the measurement precision is improved.

The invention provides an oil pan for frying food, which comprises an oil pan body, a protruding heating column and a heating sheet installed on the lower surface of the oil pan body, and a plurality of groups of vertical plates are uniformly and fixedly installed on the upper surface of the semicircular heating pan. The top of the board is movably inserted with a slide plate, and the surface of one side of the slide plate is uniformly provided with multiple sets of inclined card slots horizontally. The upper surface of the right side of the semicircular heating pot is fixed with a fixed base, and the inner surface of the top of the placement plate is provided with a transparent baffle. The transparent baffle is horizontally fixedly installed on the inner surface of the upper end of the placement plate. The lower surface of the oil pan body of the present invention is evenly equipped with six sets of heating chips, and the protruding heating column in the middle of the bottom surface of the oil pan body is also equipped with heating chips, so that the edible oil in the oil pan body can be heated quickly and evenly, and the food can be skewered The end of the bamboo stick is stuck in the inclined slot, so that the hot oil will not touch the end of the bamboo stick. During the frying process, the transparent baffle can prevent the hot oil from splashing.

The invention discloses equipment for measuring a brake lever. The equipment for measuring the brake lever comprises a base plate, and a linear bearing which is fixed on one side of the base plate; the linear bearing is provided with a measuring scale; the equipment for measuring the brake lever is characterized in that: a hole is formed on the other side of the base plate relative to the linear bearing, and a fixing sleeve is arranged on the hole; a positioning column is arranged between the linear bearing and the fixing sleeve; an L line is marked on the base plate near the linear bearing; and when a measuring head of the measuring scale is aligned with the L line, the indication on the measuring scale is 0.00mm. The invention also discloses a method for measuring the brake lever by using the equipment for measuring the brake lever; and by the design of the technical scheme, brake levers with different shapes can be efficiently and accurately positioned and measured.