4results about How to "No drift" patented technology

This invention discloses a grating galvanometer device and its control system and method. The grating galvanometer device includes: a grating galvanometer motor with a motor output shaft; a galvanometer clamp mounted on the end of the motor output shaft for clamping and fixing a laser reflector; a triangular chuck-type quick clamp with one end coaxially fixedly connected to the motor output shaft; a DD motor with a motor output shaft, the other end of which is rigidly connected to the quick clamp to allow the motor output shaft to rotate coaxially with the galvanometer; and a motor bracket for supporting the grating galvanometer motor and the DD motor. This invention uses real-time feedback data from the DD motor as a precision benchmark, enabling the acquisition, modeling, and iterative correction of short-cycle errors during the operation of the galvanometer motor. This solves the short-cycle error problem existing in low-resolution grating galvanometer motors, achieves real-time correction of the galvanometer motor's angle positioning error, improves the accuracy and consistency of laser processing, reduces equipment hardware costs, and enhances adaptability to various working conditions.

This invention discloses a graphene fiber-reinforced flexible heating composite material, its preparation method, and its applications. The composite material comprises an integrated flexible heating base layer formed by combining a fiber cloth with in-situ grown graphene with a thermoplastic resin. The graphene grows in situ on the fiber surface, forming a continuous and uniform conductive heating network, which, together with the thermoplastic resin matrix, constitutes a non-layered, integral structure. The composite material provided by this invention has a thinner structure, more uniform heating, and high interfacial bonding strength. It also possesses excellent flexibility, high structural strength, weather resistance, and washability, solving the technical pain points of existing flexible heating materials such as uneven heating, poor adhesion, and low structural strength. It can be widely used in industrial equipment heating and de-icing, low-temperature flexible bonding insulation heating, household heating, medical hot compresses, outdoor weather-resistant heating, and electric heating tube insulation, among other fields.

This invention provides a reference threshold setting device for an axle counting system, comprising: a main control unit for collecting button operation information and generating a safe reference threshold setting command; and a method for setting a reference threshold for an axle counting system, comprising: the axle counting board collecting detection parameters of axle counting detection points in real time, and the detection parameters when there are no vehicles within a specified range of the axle counting detection points being the target object for setting the reference threshold; the method further comprising the setting device sending a reference threshold setting command to the axle counting board through the axle counting host bus or the axle counting board interface. Compared with the prior art, this invention has the following advantages: it uses software commands to set the current no-vehicle detection parameters as the reference threshold, eliminating the need for hardware debugging of the reference threshold, greatly reducing the workload of axle counting system debugging, and making on-site debugging of axle counting equipment more convenient; by changing the reference threshold adjustment method to software adjustment, there will be no parameter drift or hardware damage.

The invention discloses a buried gas pipeline joint nondestructive testing technology, and belongs to the technical field of pipeline nondestructive testing, the buried gas pipeline joint nondestructive testing technology comprises four core steps of preparation before detection, ultrasonic phased array detection, X-ray detection, combination determination and result output, and by customizing a test block calibration device, detection parameters are optimized according to pipeline specifications, and the pipeline joint nondestructive testing efficiency is improved. An ultrasonic phased array method and an X-ray method are combined for detection, and a standardized judgment rule is established; and meanwhile, the matched special auxiliary device comprises an ultrasonic phased array detection auxiliary device and an X-ray machine positioning device which are respectively used for fixing the probe and the X-ray machine, so that accurate detection positioning and tight probe fitting are ensured. According to the method, the defect recognition rate is larger than or equal to 98%, the defect position error is smaller than or equal to + / -2 mm, the method is matched with De63-De355 full-specification PE pipeline joints, operation is convenient and fast, efficiency is high, various common defects of the joints can be comprehensively recognized, quantitative analysis and qualification judgment are achieved, and reliable technical guarantee is provided for buried gas pipeline joint quality control and safe operation.