38results about How to "Improve pressure detection accuracy" patented technology

The invention discloses a water tank outflow volume measurement device. The water tank outflow volume measurement device comprises an experiment water tank, a liquid-gas conversion pressure measurement cylinder, a fluid differential pressure sensor and a microcomputer, wherein one side wall of the experiment water tank is provided with an outflow port; the liquid-gas conversion pressure measurement cylinder is arranged inside the experiment water tank, the bottom of the liquid-gas conversion pressure measurement cylinder is communicated with the inside space of the experiment water tank, the side wall of the liquid-gas conversion pressure measurement cylinder is provided with a gas outlet water drainage port, and the upper edge of the gas outlet water drainage port is flush with the middle axis horizontal plane of the outflow port; the fluid differential pressure sensor is connected with the liquid-gas conversion pressure measurement cylinder and is used for detecting the differential pressure between compressed air inside the liquid-gas conversion pressure measurement cylinder and external air; the microcomputer is connected with the fluid differential pressure sensor and is used for converting the differential pressure detected by the fluid differential pressure sensor into the outflow of the outflow port. The water tank outflow volume measurement device can conveniently and accurately measure the jet flow volume of orifices in a momentum experiment instrument and orifices and pipe mouths in a pipe mouth experiment instrument in a hydromechanics fundamental experiment in a digitalized mode.

The invention discloses a roller coater which comprises a painting roller, a roller coater rack, a solution-taking roller, a solution-taking roller rack and a roller rest pressure adjustment device, wherein the roller rest pressure adjustment device comprises an operating side bearing base, a driving side bearing base, a sliding block, a turbine worm, a pressure detection element, a handwheel, a servo motor, linearity guide rails and linearity rails. The roller coater provided by the invention achieves the technical purposes that the automatization feedback and adjustment of the roller coater are realized, and the reaction accuracy is improved. Through the roller coater disclosed by the invention, the pressure detection element contacting the spherical surface of the operating side bearing base and the spherical surface of the driving side bearing base is adopted, a signal is provided for the operation of the servo motor, the regulation and control of a roller interval are beneficial, the accuracy and consistency of the thickness of a painting film are improved, and the quality of the painting film of the surface of a steel band and quality stability are guaranteed.

The embodiment of the invention discloses a display panel and a display device. The display panel comprises a display region and a non-display region around the display region; the display panel comprises at least a semiconductor pressure sensor arranged in the non-display region; the semiconductor pressure sensor is plane-like and is provided with a hollow region. According to the embodiment, the pressure detection precision of the pressure sensor is improved, and the user experience is improved.

The invention discloses a flow rate measuring device based on an efficient water head. The device comprises an experimental water tank of which the sidewall is provided with an outlet, a liquid-air converting pressure measuring barrel arranged in the experimental water tank, a liquid pressure difference sensor which is connected with the liquid-air converting pressure measuring barrel and used for detecting the pressure difference between compressed in the liquid-air converting pressure measuring barrel and the outside air, and a microcomputer which is connected with the liquid pressure difference sensor and used for converting a pressure difference signal detected by the liquid pressure difference sensor into the flow rate of the outlet, wherein the bottom part of the liquid-air converting pressure measuring barrel is communicated with an inner space of the experimental water tank, and while the top part of the liquid-air converting pressure measuring barrel is provided with a communication positioning tube; the bottom surface of the communication positioning tube is positioned on a medium shaft level of the outlet. With the adoption of the device, the jet flow rate of a momentum experiment instrument in the basic liquid mechanics experiment, a hole opening, and a hole opening and a tube nozzle in a tube nozzle experiment instrument can be conveniently digitally accurately measured; the teaching effect is good.

The invention provides a multi-point body pressure test mattress, which comprises a top layer, a bottom layer, a pressure sensor, and a jacket, and also comprises a circuit arranging wire and at least one circuit board, wherein the pressure sensor is arranged on the circuit board and positioned between the top layer and the bottom layer; the circuit boards are distributed in a shape of a strip array, so that the pressure sensors are generally distributed in a shape of a matrix; and the circuit arranging wire is connected with the circuit boards. The multi-point body pressure test mattress solves the problems of poor evaluation results, overlong evaluation time and not objective evaluation results caused by sensory evaluation of the prior technicians, improves scientificalness and efficiency of mattress design, improves pressure detection accuracy, overcomes the defects of complicated circuits and difficult operation of the prior test mattress, and has the advantages of easy folding and movement.

The invention relates to a method for detecting the pressure of the bottom surface of a granary and a pressure sensor adopted by the method. The pressure sensor which is used for detecting the pressure of the bottom surface of the granary comprises a casing and a sensitive diaphragm, wherein an elastic cushion is arranged on the sensitive diaphragm. The method for detecting the pressure of the bottom surface of the granary adopting the pressure sensor comprises the following steps: calibrating the pressure sensor, obtaining a relational model of an output value of the sensor and the pressure and a calibration coefficient, and using the pressure sensor to detect the pressure of the bottom surface of the granary. According to contact characteristics between the sensitive surface of the pressure sensor and the bottom surface of a grain pile and an influence rule of a contacting state on the output value of the pressure sensor, the method in which the elastic cushion is additionally arranged between the sensitive surface of the pressure sensor and the bottom surface of the grain pile to improve the pressure detection accuracy of the bottom surface of the granary is provided by the invention, and the method has the characteristics of being convenient for use and maintenance, convenient for calibrating of the sensor and the like.

The invention discloses a pressure sensor for a pressure cooking utensil, and a pressure cooking utensil. The pressure sensor comprises a housing, wherein one end of the housing is constructed to have a cavity with an opening, and the other end of the housing is provided with an air inlet channel communicating with the cavity; a sealing cover which is connected with one end of the housing so as to seal the opening; a positioning assembly which is arranged at a connecting position of the cavity and the air inlet channel, is in sealing connection with the housing and comprises a detection channel communicating the cavity and the air inlet channel; and a pressure detection assembly which is arranged on the positioning assembly, breaks connection of the connection channel, and has a pressure sensor chip arranged in the detection channel. According to the pressure sensor for the pressure cooking utensil, the working scope of the pressure sensor is wider, and the pressure cooking utensil can be enabled to have higher pressure detection precision.

The invention relates to the technical field of electric toothbrushes, in particular to an electric toothbrush capable of monitoring tooth brushing degree. The electric toothbrush comprises a toothbrush handle and a toothbrush head movably connected with the toothbrush handle, the toothbrush handle comprises a shell, and a battery and an electric motor are fixedly arranged in the shell; a motor shaft is arranged in the electric motor, the electric motor is connected with the toothbrush head through the motor shaft, and an indicator light is arranged on the outer side wall of the shell; a PCB circuit board is arranged on the inner side wall of the shell, a sensor element is arranged on the outer side of the electric motor, and the battery, the electric motor, the indicator light and the sensor element are electrically connected with the PCB circuit board. The electric toothbrush is reasonable and compact in design, the manufacturing cost of the electric toothbrush is reduced, the pressure detection accuracy is high, and using is convenient.

The embodiment of the invention discloses a flexible display panel and a display device. The flexible display panel comprises a pressure detection module, a pressure compensation module and a displaymodule arranged between the pressure detection module and the pressure compensation module, wherein the pressure detection module is arranged on the light emitting side of the display module; the pressure detection module comprises a first substrate, a second substrate and a first elastic spacer layer arranged between the first substrate and the second substrate, a first pressure detection electrode is arranged on the side, close to the first elastic spacer layer, of the first substrate, and a second pressure detection electrode is arranged on the side, close to the first elastic spacer layer,of the second substrate. Vertical projections of the first pressure detection electrode and the second pressure detection electrode on the first substrate are at least partially overlapped; the pressure compensation module is used for detecting the bending curvature of the flexible display panel. According to the scheme of the embodiment of the invention, the pressure detection precision of the flexible display panel is improved.

The invention discloses a gas pressure abnormity control system based on an internet-of-things intelligent gas meter, which comprises an existing internet-of-things intelligent gas meter, a pressure detection device is arranged on the internet-of-things intelligent gas meter, the pressure detection device comprises an arc-shaped hollow spring tube, one end of the spring tube is open and fixed, and the other end of the spring tube is closed and freely stretches out and draws back. The opening is communicated with a gas channel to obtain gas pressure, signal switches are installed on the two sides of the free end of the spring pipe, the pressure detection device monitors the pressure condition of a gas pipeline in real time, switching signals are transmitted to the signal storage processing device when the abnormal condition of overpressure or underpressure occurs, the valve control device is instructed to cut off the gas pipeline, and the communication device is instructed to wirelessly send gas pressure abnormity alarm information, so that automatic control and remote alarm are realized, the pressure abnormity type can be distinguished, and the system has the advantages of low cost and high pressure detection precision.

The invention discloses a piston-type momentum experiment instrument with a teaching effect flow digital-display function. The experiment instrument comprises a constant-pressure water supply tank, a water collection tank, a momentum tube, a liquid-gas conversion pressure measuring cylinder, a pressure difference sensor, a microcomputer digital display meter, and a self-circulating water supply device. The side wall of the constant-pressure water supply tank is provided with an outlet, and the outlet is a nozzle. The water collection tank is connected with the outlet of the constant-pressure water supply tank. The momentum tube is used for measuring the jet flow momentum force at the outlet of the constant-pressure water supply tank, and is fixed in the water collection tank. The liquid-gas conversion pressure measuring cylinder is arranged in a stable-water working area inside the constant-pressure water supply tank, and the top of the liquid-gas conversion pressure measuring cylinder is provided with a communicated positioning tube which is disposed in the central-axis horizontal plane of the outlet. The microcomputer digital display meter is used for converting a pressure signal detected by the pressure difference sensor into flow. The experiment instrument of the invention can reset automatically, can eliminate the error of air compression, can be zeroed in real time, is high in precision, can conveniently, digitally and accurately measure two basic physical quantities of a fluid mechanics momentum law experiment instrument, namely, jet flow rate and jet flow momentum, and has a very good teaching effect.

The invention discloses a pressure detection method of blood purification equipment, the blood purification equipment and a storage medium. The pressure detection method comprises the following steps that a current treatment mode of the blood purification equipment is determined; pressure detection points are activated according to the current treatment mode, so that a pressure detection mode formed based on the activated pressure detection points is matched with the current treatment mode, wherein a plurality of pressure detection points are arranged on the blood purification equipment, and the pressure detection points are located at different positions of the blood purification equipment respectively; and the pressure under the activated pressure detection points is detected. In this way, the pressure detection precision of the blood purification equipment in each treatment mode can be improved.

The invention relates to a pressure sensor, which comprises a pressure detection unit, a mounting part and a lower box body, and is characterized in that the pressure detection unit is used for detecting the pressure of liquid; the pressure detection unit is arranged on the upper side of the mounting part, and a pressure opening used for allowing the liquid to enter and exit is formed in the position, opposite to the pressure detection unit, of the mounting part; a lower box body is connected to the lower side of the mounting part, a guide transition groove is formed in a bottom plate of the lower box body, and a liquid opening communicated with one end of the guide transition groove is further formed in the lower box body. The pressure sensor provided by the invention is used for detecting the pressure of the liquid so as to improve the detection precision.