35results about How to "Meet high-precision measurement requirements" patented technology

The invention provides a straight waveguide, feedback waveguide and circle-straight waveguide high-sensitivity resonance system, belongs to the field of optics, and solves the problem that the conventional optical fiber resonant cavity is poor in measuring accuracy. Compared with the conventional single-ring resonant cavity structure, the system provided by the invention has the advantages that a second coupler C2 and a fourth coupler C4 are additionally introduced; through setting of coupling coefficients of a first coupler C1, the second coupler C2, a third coupler C3 and the fourth coupler C4, a certain ratio of the length of optical fibers in a ring-shaped resonant cavity to that of optical fibers in feedback waveguide is ensured, so that a Fano linear spectral line can be output, and the high-sensitivity spectral line can improve the measuring accuracy of the optical fiber resonant cavity. The system is mainly applied to high-precision measurement.

The invention discloses an accurate electromagnetic measuring method for the depth of underground pipelines and a pipeline instrument device. The operator holds the pipeline instrument device on the ground directly above the buried pipeline to measure the axis and lead of the top air-core coil and the bottom air-core coil. The included angle in the vertical direction, and the included angle between the central axis of the top air-core coil and the bottom air-core coil and the vertical direction, the inclination sensor in the pipeline instrument device is used to correct the electric current measured by the top air-core coil and the bottom air-core coil respectively. The magnetic induction intensity is the top electromagnetic induction intensity value and the bottom electromagnetic induction intensity value, as well as the distance value between the top air-core coil and the bottom air-core coil, so as to obtain a more accurate buried depth value of the ultra-deep pipeline underground pipeline. The invention is simple to implement, and the measurement deviation caused by the inaccurate measurement position of the locator can be eliminated only by the pipeline instrument device with the inclination sensor, and the measurement accuracy of the buried depth of the ultra-deep pipeline can be greatly improved.

The invention relates to a car body position detection device for car washing, which comprises a measuring device 1, a detector 3, an image processor and an electrical control module 4, and is characterized in that the measuring device 1, the detector 3 and the image processor are connected with the electrical control module 4 through lines, the measuring device 1, the detector 3 and cameras 2 in the image processor are fixed on a frame body 5, the frame body can be placed on a car washing frame 8 in a back-and-forth moving manner through a driving mechanism, and the driving mechanism 8 is connected with the electrical control module 4; the measuring device 1 comprises a transmitter 11 and a receiver 12, the image processor comprises the cameras 2 and an image recognition and operation module, the cameras 2 are fixed at the upper parts of the frame body 5 and located at two sides above an automobile 7. The advantages lie in that position values of protruding parts such as reflectors and a luggage rack on the car body contour can be measured, and measurement is performed quickly in a non-contact and automated manner; and meanwhile, the tire azimuth and the wheelbase are measured, special cleaning can be performed on tires accordingly, the head, the tail and inlet and outlet conditions of the automobile are judged, and model judgment is assisted.

The invention relates to the technical field of distance measurement, in particular to a point-line mileage measurement device, comprising: a driving wheel rolling on the surface to be measured, a decimal scale gear transmission group, an integer scale gear transmission group, a gear transmission group arranged on the decimal scale The decimal dial at the end of the group and the integer dial arranged at the end of the integer scale gear transmission shaft; the beginning end of the decimal scale gear transmission group and the beginning end of the integer scale gear transmission group are both coaxially arranged with the driving wheel, and the decimal dial has a There are n scale lines arranged in an array around its circumference, the radius of the driving wheel is r, the transmission ratio of the decimal scale gear transmission group is a, the transmission ratio of the integer scale gear group is b, and the integer scale has an array around its circumference. The t scale lines of the cloth can be calculated according to the pointer index on the integer dial and the pointer index on the decimal dial to calculate the length of the driving wheel. The invention is easy to operate, and one person can measure the length of longer builds.

The invention provides a self-feedback intelligent-fault-recognition pulse-working-condition engine propellant flow two-mode measurement device. A function realization auxiliary unit is used for cooperating with propellant flow measurement, and controlling a flowing pipeline of a propellant. A parameter detection module is used for measuring feature parameters of a propellant in a flowing process,and calculating out and deriving a propellant flow value through the feature parameters. A cylinder body support component includes an outer cylinder body and an inner cylinder body. The outer cylinder body is used for enclosing pressurized gas space. The inner cylinder body is used for storing the propellant. Peripheral components are used for ensuring propellant flow measurement stability performance. The cylinder body support component is connected with the function realization auxiliary unit through a propellant liquid discharging pipe. The propellant flows between the inner cylinder bodyand the function realization auxiliary unit through the propellant liquid discharging pipe. Flow measurement under a propellant pulse working condition is realized, the device has the characteristicsof two-mode measurement, good reliability, high stability, intelligent fault recognition and the like, and high-precision measurement requirements of engines on flow can be satisfied.

The invention provides a method for machining a multi-capacitor comb micro-accelerometer. The method comprises the following steps: performing shallow slot etching on the surface of a structural layer by means of photoetching; performing photoetching on the surface of the structural layer to define a structural pattern of the micro-accelerometer; etching the structural layer to an insulating layer by adopting deep reactive ion etching (DRIE); corroding the insulating layer by an HF solution; performing photoetching on a glass sheet, corroding glass by a BHF solution, and making a metal electrode and a lead by using a peeling process; bonding the structural layer and the glass sheet; thinning a silicon wafer substrate layer by using a KOH solution; performing photoetching on the surface of the substrate layer, and making a metal electrode by using the peeling process; performing photoetching on the surface of the substrate layer to define the structural pattern of the micro-accelerometer, and etching the substrate layer to the insulating layer by adopting DRIE; and performing splitting, packaging and testing to obtain the required multi-capacitor comb micro-accelerometer. According to the machining method, the detection capacitance area and the masses of mass blocks are increased by the substrate layer, and a produced product has the advantages of high size controllability, simple process, large detection capacitance and capability of meeting the high-accuracy measurement requirement.