39results about How to "Strong ability to resist external interference" patented technology

A synthesis of anchoic acid and nonanoic acid by mixed solvent ozone oxidation is carried out by agitating material oleic acid, water, nonanoic acid with acetic acid, inducing O3, oxidizing reacting, heating, adding catalyst, inducing oxygen, oxidizing and cracking reacting, laying aside, freezing and crystallizing water phase from first separating, extracting and leaking, separating out anchoic acid, extracting oil phase by boiled water, freezing and crystallizing, extracting and leaking, obtaining anchoic acid, washing, drying, and obtaining product. Its advantages include high productivity, moderate reaction, simple separation and purification, and no environmental pollution.

The invention provides a blast furnace multi-element molten iron quality prediction control method and system. The method comprises the steps that the expected value of a blast furnace multi-element molten iron quality index is set; the production history data of a blast furnace are acquired; a multi-element molten iron quality prediction model is established; a sequence quadratic programming algorithm and the blast furnace multi-element molten iron quality prediction model are used to calculate the optimal input, namely the optimal control quantity, of the blast furnace multi-element molten iron quality prediction model; and the optimal control quantity is fed back to a corresponding executing mechanism, so that the blast furnace multi-element molten iron quality index tracks the set expected value of the blast furnace multi-element molten iron quality index. The system comprises an index setting unit, a model training unit, a tracking calculation unit and a feedback control unit. According to the invention, the multi-element molten iron quality index can accurately and quickly reach a given requirement; the method and the system have the advantages of good tracking performance and strong anti-interference ability; the energy consumption and the cost in a production process are reduced; and the molten iron quality is further improved.

The invention provides a micro-wind vibration energy consumption suppression device for a service steel pipe tower rod part, and the device is suitable for vortex-induced wind vibration control of animportant lattice type steel pipe tower framework part such as a power transmission tower. The micro-wind vibration energy consumption suppression device is composed of a steel sleeve sheet, a first viscoelastic material, a second viscoelastic material, SMA springs, a flow guide sheet, connecting bolts and connecting plates. The device has a two-stage micro-wind vibration control effect, can destroy the Karman vortex to inhibit or reduce the generation of micro-wind vibration, and can completely achieve the purpose of controlling the micro-wind vibration of a steel pipe component through the deformation consumption of the viscoelastic materials. Meanwhile, the SMA springs with the super-elastic effect are connected between the steel pipe and the steel sleeve, so that the device has a remarkable self-resetting capability. The device is simple in structure, light in structure, flexible in arrangement, low in manufacturing cost and convenient to replace. The device has the self-resettingcapability, is strong in resistance to external interference and is good in robustness; and the two-stage micro-wind vibration control principle is achieved, the vibration control effect is remarkable, good social and economic benefits are achieved, and the application prospect is wide.

The invention discloses a method and a device for estimating sea surface wind speed based on line spectrum intensity in radar echoes. The method comprises the steps of establishing an experiential model in which intensities of a first-order peak and a secondary harmonic peak are changed along air speed, firstly estimating model parameters by fitting by taking air speed data measured in real time by virtue of a site buoy and air speed estimated on a radar close range unit by virtue of a conventional second-order spectrum method as standards, then estimating air speed by virtue of the intensities of the first-order peak and the secondary harmonic peak in an echo Doppler spectrum, weighting and combining the estimating model parameters with the air speed, so as to obtain a final air speed estimation value. According to the method and the device, the problem of high-frequency ground wave radar that an existing air speed estimation method based on an echo second-order spectrum is not accurate enough is solved; the intensities of a first-order Bragg peak and the secondary harmonic peak in the echo Doppler spectrum are related with the air speed value, so that the air speed can be directly extracted from line spectrums including the first-order peak, the secondary harmonic peak and the like, and the estimation precision of the sea surface wind speed by the high-frequency ground wave radar is substantially improved.

The invention discloses a method and device for laser radar distance measurement based on spread spectrum technology, which belongs to the field of laser radar distance measurement, and includes the following steps: S1: the bit information of the transmission sequence is compared with the phase difference of a pair of adjacent symbols The light source signal is phase-modulated, S2: the phase-modulated optical signal is transmitted through the transmitting optical antenna into the space to be measured, S3: the reflected optical signal enters the delay interferometer, thereby realizing the demodulation of the optical signal, S4: the demodulated The optical signal is photoelectrically converted by the photoelectric balance detector. S5: The local sequence uses at least one phase comparison method of chip phase comparison and code clock phase comparison to realize distance measurement. The method and device for laser radar ranging of the present invention are based on spread spectrum technology, have strong anti-interference ability, have a longer distance for detection, and are cheap. At the same time, rough measurement or fine measurement can be performed according to actual needs, and the measurement speed can be improved.