32results about How to "Simple and reliable measurement" patented technology

In an exhaust-gas turbocharger for an internal combustion engine comprising an exhaust-gas turbine arranged in an exhaust strand of the internal combustion engine and a compressor arranged in an intake tract and connected to the exhaust gas turbine so as to be driven thereby, the compressor including a compressor wheel and a compressor housing surrounding the compressor wheel and having an inlet duct, a dynamic pressure probe is provided upstream of the compressor wheel in the inlet duct for measuring at least the total pressure in the air flow into the compressor.

A measuring arrangement for measuring clearance between a bearing internal part and a bearing external part of a bearing, in particular in an aircraft or spacecraft, is disclosed. The idea underlying the measuring arrangement is to adjust the bearing part relative to the bearing external part with an adjusting device and to measure the adjustment carried out with a measuring device. The advantage according to the measuring arrangement is that a much more accurate and repeatable measuring may be achieved relative to current measuring which depends on the intuition and experience of the mechanic.

The invention relates to a telescopic feed beam for a rock drill and to a method of measuring a travel length. The pressure surface of a piston (11b) in a feed cylinder (11) of the feed beam is twice as large as the pressure surface of a piston (6b) in a feed extension cylinder (6). Furthermore, the feed beam comprises a flow indicator (19) for measuring the volume flow rate of hydraulic fluid fed and / or discharged, and thereby the travel length.

To determine the vectorial distance D between the tip of a capillary and an optical axis of an image recognition system of a Wire Bonder, a glass fibre supplied with light is used as a reference point and as a sensor. On the one hand, the glass fibre serves as a reference point with which the position of the optical axis of the image recognition system can be determined. On the other hand, the glass fibre serves as a sensor with which the position of the tip of the capillary can be determined in that it is determined at which position of the bondhead the intensity of the light which is reflected back into the glass fibre by a wire ball formed at the tip of the capillary is at a maximum.

The invention discloses a blumea oil transdermal patch, a preparation method thereof and a method for detecting active components contained in the blumea oil transdermal patch. The blumea oil transdermal patch comprises a back lining material, a medicated layer and a protective film, wherein the medicated layer comprises a humectant, a filling agent, a patch skeleton, a cross-linking regulating agent, a cross-linking agent, a thickening agent, an emulsifying agent and blumea oil. The blumea oil transdermal patch disclosed by the invention has the advantages of high medicine permeability and good adhesion without stimulation. The preparation method of the blumea oil transdermal patch comprises the following steps: respectively preparing a humectant phase composed of the cross-linking agent, the cross-linking regulating agent, the humectant and the patch skeleton and a water phase composed of the blumea oil, the emulsifying agent, ultrapure water, the filling agent and the thickening agent; slowly adding the humectant to the water phase, uniformly stirring and mixing to obtain a colloid, coating the colloid to the back lining material, adhering the protective film, and standing to solidify for 6-12 hours. According to the method for measuring the pharmacological active components contained in the blumea oil transdermal patch, an HP-INNOWAX capillary chromatographic column is adopted, the flowing phase is N2, the flow velocity is 0.7-1 mL.min<-1>, and the content of eucalyptol, camphor and borneol can be accurately measured.

Method for detecting an error leak in a pneumatic control system (1) of a transmission, wherein the control system (1) comprises an air reservoir (5) in which there is a first pressure, wherein the air reservoir (7) via at least a first switching valve (7a, 7b ) is coupled to an actuator space (6) of the control system (1), in which there is a second pressure, and said actuator chamber (6) via at least a respective second switching valve (8a, 8b, 9a, 9b, 10a, 10b) with the switching cylinders (2, 3, 4) is coupled. In embodiments of a circuit in the transmission an the actuator chamber (6) is on the or each first switching valve (7a, 7b) supplied air mass and air mass sum of at least one air mass in the actuator chamber (6) and an air mass in active switching cylinders (2, 3, 4 ) determined, and when the the Steller space (6) via the or each first switching valve (7a, 7b) supplied air mass is greater than the air mass amount to an error of leakage in the pneumatic control system (1) is closed.

The test method includes: determining test source point and target point, setting host control system and flow rate generators connected each other and with tested path via LAN exchange inside the identical LAN in the source point; setting responding system in the target point; for the host control system configure test parameters and calculate automatically the number of required flow rate generators and the additional flow size and test flow size of each flow rate generator; for the host control system to handshake the flow rate generators and the responding system, for the responding system to return calculation result to the host control system and record after the host control system informs the responding system to finish test. The system of the present invention includes a host control system, a responding system and several flow rate generators.

The invention relates to automatic air regulation protective device and method for interval series ventilation of a heading end. The device comprises more than two local fans, a flexible air barrel, a differential pressure transmitter and a variable-frequency comprehensive control module; the local fans are connected in series by the flexible air barrel, the positive pressure end of the differential pressure transmitter stretches to the front of the exhaust inlet of the succeeding local fan in the prior flexible air barrel, and the negative pressure end of the differential pressure transmitter is arranged outside the flexible air barrel; and the differential pressure transmitter is connected with the variable-frequency comprehensive control module, and the variable-frequency comprehensive control module is connected with the local fans. According to the method, the local fans are started, the differential pressure transmitter is used for measuring the pressure difference of the positive pressure end and the negative pressure end, the pressure difference is transmitted to the variable-frequency comprehensive control module for processing pressure difference data, and the air volume of the serially-connected local fans can be automatically controlled by changing the frequency of the serially-connected local fans. The device can avoid sinkage or collapse of the flexible air barrel, so as to guarantee the safety of the local fans, extend the local ventilating and air supply distance and improve the air supply quality and safety of a driving working face.

The invention relates to a method for preprocessing a biological sample by using freeze drying technique. In the invention, a freezedryer is utilized to make the biological sample into freeze-dried powder, organic solvent is utilized to extract target compounds in the sample, and the target compounds are analyzed. The method completely eliminates moisture in the sample, reduces interference of endogenous substance, changes the sample to be loose porous powder, increases the specific surface of the sample, enhances the extraction percentage of the organic solvent to the target compound and simplifies the operating procedure. Because the freezedryer can process a plurality of samples at the same time, analysis and test procedure to a plurality of biological samples is simplified, and the time for preprocessing the samples can be saved.

The invention relates to a position measuring device based on a Hall sensor and a solenoid valve. The position measuring device includes: a Hall sensor, and a magnetic steel opposite to the Hall sensor for connecting the Hall sensor and the Magnetic steel and a magnetically permeable ring used for magnetic conduction, a first magnetic flux member corresponding to the Hall sensor and the magnetic steel and arranged oppositely, and located between the two opposite first magnetic flux members The second magnetic flux member; the Hall sensor and the magnetic steel respectively abut against one end of the first magnetic flux member corresponding thereto; the outer surface of the second magnetic flux member (15) is at least A groove (151) is provided; along the direction perpendicular to the connecting line of the two first magnetic flux members, the second magnetic flux member can move linearly back and forth. The position measuring device of the invention is simple and flexible in structure, and has high measurement accuracy and sensitivity.

The invention relates to a traffic parameter measuring method based on videos. A camera is installed above the front of a measuring road junction; a reference entity a, a reference entity b, a reference entity c and a reference entity d are selected on a road, the actual distances between all line segments are measured, actual data of all line segments are input into a video analysis module, and the mapping relation between a system image coordinate system and a world coordinate system is determined so that a system can conveniently measure and calculate traffic parameters like traffic flow and vehicle speeds. Due to the adoption of a whole set of reasonable and effective camera coordinate positioning, vehicle tracking and vehicle counting methods, the traffic parameter measuring method based on the videos is wide in measuring range, reasonable and scientific in measuring reference point setting, and accurate and fast in vehicle track judgment; due to the adoption of the method, equipment can be conveniently installed, measuring can be easily, fast and reliably carried out, and the acquired traffic parameters are accurate and are instant; the method has outstanding technical features in the field of video traffic parameter detection, and provides large-capacity traffic information and reliable regulation violation evidence for fair and reasonable traffic monitoring.

The invention relates to a device and method for measuring the central thickness of a spherical part. The measuring method comprises the following steps that 1) an upper measuring head and a lower measuring head are in butt joint via relative movement, and reference displacement values detected by an upper displacement sensor and a lower displacement sensor are recorded; 2) the spherical part to be measured is displaced in a measurement gap of a bearer, the upper measuring head is moved downwardly to make contact with and abut against the upper surface of the spherical part to be measured, the spherical part to be measured is translated, and the relative displacement extremum, relative to the measurement reference, measured by the upper displacement sensor is recorded; 3) the lower measuring head abuts upwardly against and makes contact with the lower surface of the spherical part to be measured, and the relative displacement value, relative to the measurement reference, measured by the lower measuring head is obtained; and 4) the relative displacement extremum and the relative displacement value are algebraically added to obtain the central thickness of the spherical part to be measured. According to the invention, measurement is simple and reliable, overturning leveling is not needed at the end surfaces, and the measuring efficiency and precision are higher.