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46 results about "Feret diameter" patented technology

The Feret diameter or Feret's diameter is a measure of an object size along a specified direction. In general, it can be defined as the distance between the two parallel planes restricting the object perpendicular to that direction. It is therefore also called the caliper diameter, referring to the measurement of the object size with a caliper. This measure is used in the analysis of particle sizes, for example in microscopy, where it is applied to projections of a three-dimensional (3D) object on a 2D plane. In such cases, the Feret diameter is defined as the distance between two parallel tangential lines rather than planes.

Laser beam incident optical device

A step-index-type optical fiber (101) made of a material containing quartz, and having a clad thickness 0.035-0.1 times the core diameter and a numerical aperture NA of 0.06-0.22 is used. A laser beam (L) from a giant-pulse-oscillation-system solid laser oscillator (111) having a peak power of over 10 MW is shone divergently to the incident end surface (102) of the optical fiber, whereby enabling a laser beam to be transmitted without damaging the optical fiber.
Owner:KK TOSHIBA +1

Composition of silver-conjugated compound composite

A composition of a silver-conjugated compound composite containing (1) a silver-conjugated compound composite containing a silver particle with a Feret diameter of 1,000 nm or less and a conjugated compound having a weight average molecular weight of 3.0×102 or more being adsorbed to the silver particles and (2) an ionic compound. The ionic compound may be a compound having a structure represented by the following Formula (hh-1):[Chem. 1]Mm′+aX′n′−b  (hh-1)wherein Mm′+ represents a metal cation, X′n′− represents an anion, a and b each independently represent an integer of 1 or more, and when Mm′+ and X′n′− are each plurally present, they may be the same as or different from each other.
Owner:SUMITOMO CHEM CO LTD

Fruit size nondestructive detection method based on orthogonal binocular machine vision

The invention discloses a fruit size nondestructive detection method based on orthogonal binocular machine vision. Two industrial cameras with the orthogonal central axes are adopted to carry out image acquisition on an object; then an acquired image is subjected to preprocessing, characteristic quantity extraction and reasonable algorithm calculation through an MATLAB algorithm to obtain a top view standard contour graph and a side view standard contour graph; the side view standard contour graph is subjected to data processing to obtain the distance from the maximum fruit diameter surface tothe fruit bottom, which is called the height of the fruit diameter surface; the top view standard contour graph is subjected to data processing to obtain the calculated fruit diameter; by combining the height of the fruit diameter surface, a height proportion coefficient k is introduced for correcting the calculated fruit diameter to obtain the fruit diameter with a relatively small error; and then comparison is carried out based on the national fruit grading standard, so that the nondestructive measurement of the fruit size is realized. The method has the characteristics of standardization,high efficiency, high precision and damage detection, thereby having an important research significance.
Owner:HUNAN AGRICULTURAL UNIV

Laser caliper and method for measuring tree diameter by laser caliper

The invention relates to the field of a distance measurement device and particularly relates to a laser caliper and a method for measuring a tree diameter by the laser caliper. According to the method provided by the invention, a movable laser point on the diameter-measuring laser caliper correspondingly irradiates an object; when the laser point moves to an edge of the object, a laser degree exceeds a pre-set threshold value; the thickness of the object is obtained through measuring the movement amount of the laser point on the caliper; and the laser caliper can be applied to the aspects of measuring the thickness of the object, measuring the diameter of a cylinder and the like, and is particularly applied to the aspect of measuring the tree diameter. The laser caliper has the beneficial effects that the device is reasonable in structure, high in reliability, high in measurement precision, and simple and convenient to operate; a single person can operate when the laser caliper is used for measuring the tree diameter, the laser caliper can be used for automatically measuring when a measuring key is pressed, and then a liquid crystal screen is used for displaying in real time and automatically recording; the equipment cost is low so that the laser caliper can be popularized in a large range; the device can also be applied to measurement works of other fields; and when the laser caliper is used for measuring the tree diameter, data is stored into the cloud simultaneously, so that data backup is carried out and people of a far terminal can conveniently check the data.
Owner:湖南创研工业技术研究院有限公司

Square closed magnetic circuit chip inductor

The invention discloses a square closed magnetic circuit chip inductor which comprises a base. The base comprises a plastic substrate or a left copper conducting piece and a right copper conducting piece which are in central symmetry. A plurality of bosses and a plurality of wire hanging hooks are arranged on the base. Magnetic cores are arranged at the inner diameters of the bosses. Magnetic covers are arranged on the outer diameters of the bosses. Locating grooves are formed in the bottom ends of the side walls of the magnetic covers. Substrate connecting, winding, tin soldering, dispensing, assembling, post-processing printing, and testing or packaging are carried out, winding, tin soldering and assembling are mainly carried out, full automation is achieved, the structure is reasonable, the full-automatic winding technology of various wire diameters can be achieved, machining cost is greatly lowered, the bosses are designed on the plastic substrate or the left copper conducting piece or the right copper conducting piece, the stability of electricity is guaranteed, the magnetic cores are located on the inner diameters, the magnetic covers are located on the outer diameters, the success rate of automatic assembling is greatly improved, the temperature resistance degree is greatly improved, and the adhesive force of the copper conducting pieces and the magnetic cores is greatly improved.
Owner:太尼电电子科技(东莞)有限公司

Intelligent tree diameter measuring laser gun and method for measuring tree diameter

The invention relates to the field of distance measuring devices, in particular to an intelligent tree diameter measuring laser gun and a tree diameter measuring method. A laser distance measurement principle is used, distances from laser points to a tree are measured by three lasers on the laser gun respectively, a tree diameter can be calculated by utilizing a function formula due to fixed angles among the three lasers, a measured result is uploaded to a mobile terminal automatically through a wireless network, after a worker determines the measured result on the mobile terminal, the determined result is uploaded to a Cloud for back-up, and mobile terminal data and Cloud data are automatically and synchronously updated. The intelligent tree diameter measuring laser gun and the tree diameter measuring method disclosed by the invention have the beneficial effects that the device is reasonable in structure, convenient to use, high in reliability and high in measurement accuracy; the operation is simple, easy and convenient, one worker is enough to perform the operation of tree diameter measurement, and automatic measurement, real-time display by a liquid crystal screen and automatic record can be performed by just pressing a measurement press key; the equipment is low in cost and can be widely popularized; the device can also be applied to measurement work in other fields; and during tree diameter measurement, the data is stored in the Cloud at the same time, so that the data is backed up and is also convenient for a person at a far end to look over.
Owner:广西林业集团桂江林业勘测设计有限公司

Preparation method for optical fiber preform rod

ActiveCN106082631AAvoid Cutoff WavelengthsAvoid the problem of zero dispersion wavelength exceeding the standardGlass making apparatusVitrificationFiber
The invention discloses a preparation method for an optical fiber preform rod. The preparation method comprises the steps: forming a core rod coating on the surface of a core rod, wherein the core rod has first core rod parameters; extending the core rod, fusing auxiliary rods to the two ends of the core rod so as to prepare a start rod which has a first core diameter, calculating an outside diameter value of the start rod, and calculating the weight of the start rod according to the outside diameter value of the start rod; calculating outside diameter of the preform rod to be deposited, and calculating the weight of the preform rod to be deposited according to the outside diameter of the preform rod to be deposited; obtaining the weight of the deposited coating of the preform rod; and depositing loose bodies to the surface of the preform rod to be deposited, carrying out real-time monitoring on the weight of the deposited loose bodies until the weight reaches the weight of the deposited coating of the preform rod, and carrying out vitrification, thereby preparing the optical fiber preform rod. According to the preparation method for the optical fiber preform rod, the fluctuation of core coating ratio of the preform rod can be lowered, and the problem that fiber cutoff wavelength and zero dispersion wavelength are overproof is solved.
Owner:ZHEJIANG FUTONG OPTICAL FIBER TECH +1

Shock absorber installation structure

The invention relates to a shock absorber installation structure. The shock absorber installation structure comprises a shock absorber, a shock absorber installation shaft and a frame, wherein the shock absorber installation shaft is matched with the shock absorber, and the frame is used for fixing the shock absorber installation shaft. The shock absorber installation shaft is a stepped shaft and comprises a first diameter part, a second diameter part, a third diameter part and a fourth diameter part, wherein the diameters of the first diameter part, the second diameter part, the third diameter part and the fourth diameter part gradually decrease. A threaded section is arranged on the fourth diameter part and matched with a self-locking nut. The shock absorber installation shaft and the frame are connected and fixed by locking the self-locking nut. According to the technical scheme, by limiting the radial displacement and the radial rotation of the shock absorber installation shaft, the abnormal damage to installation rubber pads is avoided, the deformation of the first installation pad and the second installation pad in the disassembly and assembly process is avoided, the risk that a shock absorber installation support cracks is lowered, and the assembly efficiency of a shock absorber is improved.
Owner:ANHUI ANKAI AUTOMOBILE

Fruit diameter measuring device

PendingCN110567346AReduce mechanical damageReduce the problem of easy mechanical damage to the fruit surfaceMechanical diameter measurementsApparatus for force/torque/work measurementDisplay deviceEngineering
The invention discloses a fruit diameter measuring device. The device comprises an upper shell which is provided with a first opening end with a downward opening, a lower shell which is hinged to theupper shell through a hinge shaft and is provided with a second opening end with an upward opening, a tension sensor which is set in a containing groove, a controller which is arranged in the accommodating groove and is electrically connected with the tension sensor, a display device which is arranged on an outer surface of the upper shell and is electrically connected with the controller, and a battery which is arranged in the containing groove and is electrically connected with the tension sensor, the controller and the display device, wherein a first elastic belt is arranged at the openingend, a second elastic band is arranged at the second opening end, a containing groove is formed in the hinge shaft, and one end of the first elastic band and one end of the second elastic band pass through a cavity wall of the containing groove to be connected with the tension sensor to measure elasticity values of the two elastic bands. According to the device, the problem of easy mechanical damage to a surface of fruit due to contact between a vernier caliper and a fruit skin can be reduced.
Owner:SHANDONG INST OF POMOLOGY
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