10results about How to "Solve measurement difficulties" patented technology

The invention relates to the technical field of nuclear power station welding seam detection, in particular to a measuring device and a measuring method for nuclear power station fillet welding seam nondestructive testing, the measuring device comprises a ruler plate, a sliding ruler and a stepped sliding groove, the main body of the ruler plate is a pentagon formed by cutting one corner of a square, and the inclined edge and the adjacent edge of the pentagon are arranged at 135 degrees; two sides, adjacent to the bevel edge, of the ruler plate are provided with stepped sliding grooves, the two stepped sliding grooves are perpendicular to each other in the same plane, the two stepped sliding grooves are in limited sliding connection with two sliding rulers respectively in the length direction, the opposite ends of the two sliding rulers abut against welding corners on the two sides of a T1 or H1 fillet weld respectively, and a marking line is carved at the outer side end of each sliding ruler. The ruler plate is provided with scales at the edges of the two stepped sliding grooves. The invention provides the measuring device and method for measuring the special fillet weld of the nuclear power station.

This application provides a two-dimensional balancing motion device, relating to the technical field of motion devices. The two-dimensional balancing motion device provided in this application includes: a base, a first-direction balancing mass driving device and a second-direction balancing mass driving device disposed on the base, a two-dimensional balancing mass block connected to the first-direction balancing mass driving device and the second-direction balancing mass driving device, a two-dimensional motion device disposed on the two-dimensional balancing mass block, and a driven component connected to the two-dimensional motion device; the two-dimensional balancing mass block is an integral structure; the first-direction balancing mass driving device is capable of driving the two-dimensional balancing mass block to move along a first direction, and the first-direction balancing mass driving device is configured to allow the two-dimensional balancing mass block to move along a second direction; the second-direction balancing mass driving device is capable of driving the two-dimensional balancing mass block to move along a second direction, and the second-direction balancing mass driving device is configured to allow the two-dimensional balancing mass block to move along the first direction.

The utility model discloses a circuit for converting an alternating current weak signal into a direct current signal and a signal conversion device.The circuit comprises a signal amplification module, a frequency gating module, a waveform conversion module and an emitter following module, and the signal amplification module is used for amplifying the input alternating current weak signal to obtain an alternating current amplification signal; the frequency gating module is used for filtering harmonic waves in the alternating-current amplified signals to output frequency gating signals, the waveform conversion module is used for converting the frequency gating signals into direct-current signals, and the emitter following module is used for enabling the direct-current signals to have load capacity so as to buffer and output the direct-current signals. The circuit provided by the utility model can convert an AC weak signal into a DC signal with a relatively high voltage, so as to facilitate direct reading of a DC voltage value by using an ADC (Analog to Digital Converter).

The invention discloses a vacuum infusion liquid level control method and a vacuum infusion device thereof, and the method comprises the steps: 1, placing a capacitor to be infused into a vacuum main body, and enabling a liquid outlet pipe of an auxiliary tank body to be communicated with the capacitor; 2, the vacuum main body and the auxiliary tank body are vacuumized through a vacuum pump, so that the vacuum main body and the auxiliary tank body have the same negative pressure; 3, the height of the auxiliary tank body is adjusted, so that the upper end face of the overflow pipe is flush with the planned perfusion liquid level; 4, liquid to be poured is injected into the auxiliary tank body; step 5, filling until the liquid level in the capacitor is flush with the upper end face of the overflow pipe, wherein the liquid level does not change any more to form balance; and 6, closing the valve of the liquid outlet pipe to complete vacuum infusion. According to the vacuum infusion liquid level control method and the vacuum infusion device thereof, the auxiliary tank body with the same negative pressure as the vacuum main body is arranged, the upper end face of the overflow pipe is adjusted to be flush with the planned infusion liquid level face, the vacuum environment metering problem is solved, and the infusion consistency of batch products is guaranteed.

The present invention provides a device and method for measuring the body length of lepidopteran larvae, mainly including a chassis (1) and a top cover (2); the chassis is provided with multiple groups of measurement channels (12), and through the cooperation of measurement channels (12) with different widths, the behavior of the larvae is guided to enter the measurement channel (12) adapted to the body shape of the larvae, so that on the premise of accurately measuring the body length of lepidopteran larvae, the measurement deviation caused by the curling up and strong activity of the larvae can be reduced, and at the same time, the harm to the larvae during the measurement process can be reduced; the device for measuring the body length of lepidopteran larvae is generally easy to install and convenient to operate.

This invention provides a DC active filter device based on square wave modulation. The device includes: at least one independent DC active filter unit; each DC active filter unit is connected in parallel across the two ends of a DC bus; each DC active filter unit includes: a measurement circuit that measures the ripple current of the DC bus; a control circuit that calculates the frequency components of the ripple current and then obtains a switching signal through square wave modulation, the frequency of which is equal to the target frequency of the ripple current to be compensated; and a drive circuit that sends the switching signal to the main power circuit, causing the switching devices in the main power circuit to operate and generate a compensation current to compensate for the ripple current of the target frequency component of the DC bus. This invention solves the problem of poor ripple suppression performance of high-power DC active filters at low switching frequencies. It enables the application of DC active filters at lower switching frequencies up to MW-level power applications, meeting the DC bus ripple suppression requirements for long-term operation of high-power power supplies.

The invention discloses a gas collecting device for collecting plant and soil breathing gas, which comprises a chassis, the outer side of the upper part of the chassis is sleeved with a telescopic flexible sealing gas collecting bag, the outer side of the lower end part of the flexible sealing gas collecting bag is provided with a first hoop corresponding to the outer side of the chassis, and the inner side of the upper end part of the flexible sealing gas collecting bag is provided with a top cover; a second hoop is arranged on the outer side of the upper end part of the flexible sealing gas collecting bag corresponding to the outer side of the top cover; in use, assembly is convenient, disassembly is easy after use, field assembly is convenient, and operation can be conducted by a single person; the telescopic flexible sealing air collecting bag is adopted, so that the advantage of being convenient to carry is achieved; the telescopic flexible sealed gas collection bag is adopted, so that the height can be adjusted, and the problem of difficult measurement caused by different heights of vegetation plants is solved; under the action of the bracket and the airtight material, the effects of firmness, durability, water prevention, sand prevention and good sealing condition are achieved; manufacturing materials are cheap and easy to obtain, and the manufacturing cost is low.

The invention discloses an ultra-wideband channel characteristic photoelectric fusion measuring device, which is characterized by comprising a vector network analyzer, a signal processing module, a signal processing module, a signal processing module, a signal processing module and a signal processing module, wherein the vector network analyzer is used for generating sweep frequency signals according to start-stop frequencies and sweep frequency points of ultra-wideband channel measurement; the measurement signal transmitting unit is used for transmitting an ultra wide band radio frequency measurement signal according to the sweep frequency signal; the measurement signal receiving unit is used for receiving the ultra wide band radio frequency measurement signal transmitted through a wireless channel and obtaining frequency domain response data of the ultra wide band radio frequency measurement signal through system response loss compensation; the channel data acquisition and storage unit is used for acquiring time domain response data according to the frequency domain response data and storing the frequency domain response data and the time domain response data; and the intelligent channel characteristic analysis unit is used for analyzing the characteristics of the multi-dimensional ultra-wideband channel according to the frequency domain response data and the time domain response data. According to the invention, ultra-wideband channel measurement in indoor and outdoor scenes is supported, and multi-dimensional channel parameters in the ultra-wideband channel can be accurately extracted.

The invention discloses a stability evaluation method, device and equipment for a DRAM (Dynamic Random Access Memory) power supply and a storage medium, and the method comprises the following steps: running a preset first test program in a kernel stage of a starting process of an operating system of tested equipment to obtain a power supply voltage of a system-on-chip, carrying out first stability evaluation according to a comparison result of the power supply voltage of the system-on-chip and a preset first threshold value; running a preset second test program in a boot loader stage of the starting process of the operating system to obtain the power supply voltage of the DRAM, and performing second stability evaluation according to a comparison result of the power supply voltage of the DRAM and a preset second threshold value; wherein when the first stability evaluation and the second stability evaluation are both passed, the power supply stability evaluation of the DRAM is judged to be passed, and otherwise, the power supply stability evaluation of the DRAM is judged not to be passed. According to the invention, the problems of inaccurate evaluation, complex operation and incapability of adapting to high-density PCB design caused by direct measurement of voltage fluctuation of the power supply pin by depending on an oscilloscope in the prior art are solved.

The invention provides a system and method for measuring the usage amount of enameled wire insulating paint, and relates to the technical field of insulating paint measurement, and the method comprises the steps: when a work order distributed by a production system starts to produce, when a liquid level sensor detects that the liquid level of the insulating paint reaches the lowest point each time, the liquid level sensor detects that the liquid level of the insulating paint reaches the highest point each time; recording a corresponding time point and the weight of the insulating paint when the production of the work order is finished, and then generating an insulating paint consumption curve; dividing the insulating paint consumption curve according to each time point to obtain a plurality of insulating paint consumption intervals, then calculating the insulating paint consumption in the insulating paint consumption intervals according to the insulating paint weight corresponding to the end point of each insulating paint consumption interval, and then accumulating the insulating paint consumption to obtain the insulating paint usage amount corresponding to the current work order. The beneficial effects are that the insulating paint usage amount of each work order is measured independently and accurately, so that the accuracy of order cost is improved, and fine management and cost control of enterprises are facilitated.