40results about How to "Achieve the purpose of measurement" patented technology

The invention provides a binocular vision measuring method which comprises the following steps: shooting the same object by a left camera and a right camera of a binocular camera synchronously for binocular image acquisition, so as to obtain a left image and a right image; performing feature point extraction on the left image and the right image by using an SURF algorithm, and roughly matching feature point pairs; screening the feature point pairs subjected to the rough matching by using an RANSAC algorithm according to the linear relationship of geometrical imaging, so as to obtain credible feature point pairs; measuring the object by using relevant formulas of binocular stereoscopic vision three-dimensional measurement according to location information of the credible feature point pairs in the left image and the right image. According to the invention, the binocular vision principle is utilized and the SURF algorithm and the RANSAC algorithm are combined to realize the real-time measurement on the distance between the object and the camera; when the method is used for unmanned planes, the distance measuring problem of the unmanned planes during the flight process can be solved, so that the method has practical significance.

The invention discloses a long-neck automatic telescopic measuring rod. The long-neck automatic telescopic measuring rod comprises a telescopic rod; the telescopic rod comprises at least two layers of hollow casing pipes nested with each other, wherein the outset layer casing pipe is fixed, and the rest layer casing pipes are designed to be telescopic; expansion of the casing pipes is realized via a following structure: a metal rod is arranged at the center of the telescopic rod, the top of the metal rod is connected with a stepping motor, the stepping motor is used for driving a gear, and meshing of the gear with racks on the internal walls of the casing pipes is realized; a spring rod is arranged at the center of the telescopic rod; the spring rod is used for supporting and pulling the metal rod so as draw the gear towards the racks; the stepping motor is controlled by a control circuit, automatic step counting can be realized, and measuring is realized. The long-neck automatic telescopic measuring rod possesses both automatic telescopic function and measuring function, the length of the telescopic rod is adjustable, free expansion is achieved, the long-neck automatic telescopic measuring rod is portable, and both measuring and displaying can be realized.

The invention relates to a wind measurement method of an anemometer tower and a wind shadow resistant anemometer tower. The anemometer tower comprises a tower drum vertically arranged on the ground, wherein the tower drum is provided with horizontally arranged installation rods at the wind measuring height positions, the installation rods are installed on the tower drum in a mode of being capableof rotating around the axis of the tower drum, a first end of each installation rod is provided with wind measuring instruments, a second end of the installation rod is provided with a counterweight block, and each installation rod is provided with a vertically arranged wind blocking plates; and the rotation of the installation rod is monitored after an external force is applied to the installation rod, and the wind direction at the wind measuring height surface of the anemometer tower is obtained according to a rotation angle detection value of the installation rod. The rotating process of the installation rod to which an external force is applied along the wind is monitored, so that the installation rod is enabled to form a wind indicator of the anemometer tower, the wind direction in the same direction as the installation rod can be obtained by only detecting the orientation of the installation rod when changing the rotating direction or the final orientation when the installation rod is static, the wind measuring instrument installation plane is enabled to have a function of measuring the wind direction, and a purpose of accurately measuring the wind direction of the anemometertower is achieved.

The invention relates to a device and a method suitable for measuring a geometric parameter of a superplastic non-spherical free bulge in a superplastic non-spherical free bulge experiment and also suitable for measuring a shape change geometric parameter of an axisymmetric rotating curved surface. The device comprises a measured bulging part, an annular light source, a video camera, a PC machineand an adjustable holder, wherein the annular light source is coaxial with a lens of the video camera and is positioned between the measured bulging part and the video camera; the annular light source and the video camera are arranged on the adjustable holder; and the PC machine controls the video camera to continuously acquire images of the measured bulging part and processes the acquired imagesto measure and calculate the geometric parameter of the measured bulging part. Compared with other measuring methods, the measuring method takes the measured bulging part images as information carriers and extract available information by analyzing and processing the measured bulging part images, thereby achieving the purpose of measurement; in addition, the invention has the advantages of non-contact, abundant obtained information, high measuring precision and measuring speed and the like; and the invention can realize on-line real-time measurement.

The invention relates to a miniature optical module for a multi-channel distributed optical fiber temperature sensing system, which differs in that it includes a single-mode to multi-mode collimator, a multi-mode collimator, two Filters, an optical path switching element, two bandpass filters, two TO hermetic packaged avalanche photodiodes APDs with converging functions, and a housing that encapsulates the entire optical device. The single-mode to multi-mode collimation Two wavelength-division multiplexing filters at an angle to the optical axis are arranged in parallel on the transmission optical path of the device, and one said avalanche photodiode APD is arranged on the reflection optical path of each wavelength-division multiplexing filter, and each avalanche Above the photodiode APD, the band-pass filter is arranged, the incident light of the band-pass filter forms an included angle with the optical axis, and the wavelength division multiplexing filter and the multi-mode collimator are provided with a channel for switching the optical path. The optical path switching element. The invention can measure in multiple channels, has high integration, small volume and high reliability.

The invention relates to a device and a method for simultaneously measuring components and flow of methane. The method comprises the following steps: controlling an output signal of an amplifying circuit through an automatic gain circuit, identifying that whether a gas to be measured is air or methane through judging the relative size of an ultrasonic signal, if the gas to be measured is the methane, measuring the sound velocity of the methane through an ultrasonic sensor, measuring the temperature of the methane through a temperature measuring unit, calculating the volume concentration of CO2 gas in the methane by using a mixed gas characteristic equation, calculating the volume concentration of vapor by using a relation between the temperature and saturated vapor pressure, finally obtaining a volume concentration of CH4 gas, and measuring the flow of the methane through measuring a time difference between fair current and adverse current of the ultrasonic signal. According to the method, through treating signals measured by one temperature sensor and one ultrasonic sensor, the components and the flow of the methane can be measured, and an effective solution is provided for low-cost requirement in methane industrial application.

The invention discloses a size self-adjusting package production equipment, which comprises a shearing device and a height measuring chamber arranged in the shearing device, a height measuring mechanism is arranged in the height measuring chamber, and the height measuring mechanism Including a measuring block and a blanking connection block, the height measuring mechanism can automatically detect the height of the product to be measured and feed back its height value through the blanking connection block; The height of the product can be used to process the package, which can prevent the size of the package from being too large or too small, save materials, and achieve the maximum benefit. This device uses a sensor that can move down to touch the product to achieve the purpose of measurement. , and record its height so that it can be mass-produced and processed.

The invention relates to a device for measuring a high-voltage pulse power supply of a xenon lamp of a laser device, belonging to the technical field of measuring instruments. In the device, a peak value detection circuit is provided, wherein the peak value detection circuit comprises a voltage dividing circuit consisting of a high-voltage resistant mica electric capacitor and two sample-hold circuits consisting of two-stage operational amplifiers; when in use, a fast high-voltage pulse triggered by the high-voltage pulse power supply of the laser device xenon light is in sampling and holding, and the peak value of the fast high-voltage pulse is enabled to keep invariant for a period of time; the two sample-hold circuits play different roles, in particular the post level of operational amplifier which can prevent a sampled electrical level from falling for a long time and waits for an analog digital conversion of the post level. In a space between two pulses, when a first output voltage of the operational amplifier descends, two diodes can prevent the input voltage of the post level of operational amplifier from descending, thereby the post voltage output is more stable. The invention has high precision, favorable dynamic response specialty, small size, light weight, convenient and simple use and high practicality, and is suitable for measuring the high-voltage pulse power supply of the xenon lamp of a high repetition frequency laser device.