12results about How to "Low anti-interference" patented technology

The invention discloses a polymer fluorescent sensing film for detecting a neurotoxic agent sarin simulant as well as a preparation method and application of the polymer fluorescent sensing film. The polymer fluorescent sensing film is prepared by crosslinking an acylhydrazone bond formed by bis-p-phenylene dihydrazide connected with a polyethylene glycol chain and tetraphenyl ethylene terephthalaldehyde through a Schiff base reaction. The polymer fluorescent sensing film has the excellent properties of both the polyethylene glycol chain and the tetraphenyl ethylene, the introduction of the polyethylene glycol chain enables the film to have more excellent flexibility, and the introduction of the tetraphenyl ethylene enables the film to have richer luminescent properties and better photochemical stability. The polymer fluorescent sensing film shows ultra-sensitive, high-selectivity, rapid and recoverable response to a nerve toxic agent sarin simulant diethyl chlorophosphate, has a detection limit of 1 ppt for diethyl chlorophosphate, has high anti-interference capability for hydrochloric acid and other volatile organic compounds, and can be used for detecting the nerve toxic agent sarin.

The invention relates to a tension signal amplification device with EtherCAT and a control method thereof.The tension signal amplification device with the EtherCAT comprises a signal acquisition module, a master control data processing module and an EtherCAT processing module, the signal output end of the master control data processing module is connected with the signal input end of the EtherCAT processing module, and the signal output end of the signal acquisition module is connected with the signal input end of the EtherCAT processing module; the master control data processing module is used for conducting data filtering, conditioning and operation processing on sensing signals collected by the signal collecting module and sending tension data generated after processing to the EtherCAT processing module, and the signal output end of the EtherCAT processing module is connected with the data communication end of a master station. And the EtherCAT processing module is used for packaging the received tension data according to an EtherCAT protocol, and sending the packaged data to a master station through a signal output end of the EtherCAT processing module, so as to realize real-time communication and data transmission. Through the efficient data transmission characteristic of the EtherCAT protocol, the real-time performance, the reliability and the communication efficiency of the system are improved.

The invention provides a UWB-based concrete protection layer thickness detection device, method and system, and relates to the technical field of concrete thickness detection. The concrete protection layer thickness detection device based on UWB comprises a UWB sensor which is used for transmitting a UWB pulse signal to a concrete protection layer and receiving a UWB pulse reflection signal reflected back from the concrete protection layer; and the controller is used for calculating the one-way propagation time of the UWB pulse signal in the concrete based on the time of transmitting the UWB pulse signal and the time of receiving the UWB pulse reflection signal, and calculating the thickness of the concrete protection layer in combination with the wave velocity of the UWB pulse signal. The method has the advantages of high positioning precision, high time resolution, good environmental interference resistance and low emission power requirement, and can comprehensively improve the detection precision.

This invention discloses a dual closed-loop control system and method for rubber mixing pressure in a rubber mixing mill, relating to the field of automation control technology. The system sets a target pressure, monitors the feedback value of the external pressure closed loop, acquires the external pressure closed loop feedback value, calculates a first input value based on the target pressure and the external pressure closed loop feedback value, obtains a first output value based on the deviation between the first input value and a preset first input value threshold, uses the first output result as the input value of the internal pressure closed loop, collects the detected value of the pump inlet pressure, calculates a second input value based on the first output result and the detected pump inlet pressure, adjusts the control pressure of the pump inlet based on the deviation between the second input value and a preset second input value threshold, and controls the speed of the servo motor through a servo controller to stabilize the pump inlet side pressure.

The invention relates to an equipment positioning method and device, equipment, a storage medium and a program product. The method comprises the following steps: acquiring Bluetooth connection strength and Bluetooth distance measurement results of to-be-positioned target equipment and anchor point equipment; constructing a first signal feature of the target device according to the Bluetooth connection strength and the Bluetooth ranging result of the target device; determining a target signal feature matched with the first signal feature in a plurality of pre-constructed second signal features; wherein each second signal feature is associated with a preset area, and each second signal feature is constructed according to the Bluetooth connection strength and the Bluetooth distance measurement result of the calibration device and each anchor device in the corresponding preset area; and outputting a positioning result of the target device according to a preset area associated with the target signal feature. By adopting the method, low-cost, high-precision and high-efficiency equipment positioning can be realized.

This invention belongs to the field of injection molding machine technology, specifically a screw injection molding machine with constant temperature heating of the barrel. The proposed solution includes: an injection unit, with a feed hopper detachably fixed to its side; a power unit, with its top fixed to the bottom of the injection unit; a barrel, with its bottom fixed to the top of the injection unit; a heating mechanism nested on the outer surface of the barrel; vertical rods, with one end fixed to the outer surface of the heating mechanism; a placement plate, fixed to the other end of the vertical rods; and a screw, with its bottom positioned at the top of the injection unit. This invention utilizes a cyclic high-temperature environment to cause significant deformation of the bimetallic strip. After bending, the active and passive layers of the bimetallic strip tightly adhere to the outer wall of the barrel. Heat is directly transferred to the barrel through the metal cap and bimetallic strip in a solid-state heat conduction manner, significantly improving heat transfer efficiency.

The application provides a Doppler positioning method based on frequency hopping spread spectrum, and belongs to the technical field of radio positioning, to solve the problem that the fixed carrier frequency mode adopted by the traditional Doppler positioning technology makes the signal extremely easy to be intercepted, oriented and interfered. The method comprises the following steps: step 1: describing an application scenario; step 2: in the application scenario, a frequency hopping measurement signal is sent by a transmitting end; step 3: in the application scenario, a receiving end performs frequency hopping synchronization and measures a Doppler shift; step 4: a Doppler shift is preprocessed; and step 5: the preprocessed Doppler shift is used to calculate the position of a terminal to be positioned in combination with the relative motion of the transmitting end and the receiving end. The method can obtain the low interception rate and anti-interference ability given by the rapid change of the carrier frequency, and can also use the frequency diversity characteristics of frequency hopping to reduce the positioning performance deterioration caused by the multipath effect, and is suitable for application scenarios with high requirements for robustness, positioning accuracy and other performances.

The invention relates to the technical field of biology, in particular to an analysis method for analyzing the iodination modification level of protein in a biological sample and identifying modification sites of the protein. Target protein to be detected is extracted from a biological sample to be detected through co-immunoprecipitation, the content of iodinated tyrosine in the protein is detected through acid hydrolysis, and the iodinated modification level of the protein to be detected is obtained. The iodination site information of the target protein is obtained by performing iodination chemical modification on the target protein by using an iodinated salt-Fenton reaction, then performing enzymolysis digestion, and analyzing the digested peptide fragment by using a high-resolution mass spectrum. The method disclosed by the invention can be used for accurately and quantitatively analyzing the iodination modification peptide fragment and analyzing the iodination modification level of the iodination modification peptide fragment, has the advantages of high sensitivity and simplicity and convenience in use, and provides a good technical means for iodination modification of protein / peptide.

The invention discloses a main control board serial port communication method based on a non-standard Modbus communication protocol, which comprises a main control board and a slave board, a non-standard Modbus protocol format is adopted between the main control board and the slave board as a communication format, the main control board sends a request to the slave board, the slave board responds to the request to the main control board, and receiving is completed through an overtime judgment frame. And judging whether timeout retransmission is carried out or not through timeout transmission, wherein the frame data comprises an address field, a function code, a register address, parameter data and verification. According to the invention, delay communication is solved (big data transmission is avoided), and the communication reliability is improved; a non-standard Modbus protocol is used, so that later development and expansion (newly added functions) are facilitated, and the flexibility is improved; normal communication is realized under the condition that low-rate transmission of a UART serial port is not modified, and low cost and anti-interference capability of a product are ensured.

The invention discloses a protection device and method for a vehicle wire harness connector, and relates to the technical field of vehicle protection. The device comprises a device body, a jack is formed in the device body, a connecting seat is arranged in the jack of the device body, and a wire harness is arranged in the connecting seat; anti-shaking devices are arranged on the upper side and the lower side of the device body, anti-exposure devices are arranged on the peripheries of the anti-shaking devices, and anti-collision devices are arranged on the sides, away from the device body, of the anti-exposure devices. The anti-shaking device comprises two protective shells. The device body is well protected, electromagnetic interference borne by the device body is reduced by means of the material characteristics of the protective shell, meanwhile, the freely-sliding fixing assembly can quickly adjust the mounting direction, the situation that mounting tightness is reduced due to the mounting dislocation phenomenon is avoided, meanwhile, the mounting difficulty is not increased due to the small space, and the mounting efficiency is improved. And the speed of installing the protective shell in the cabin is effectively accelerated.

This invention discloses a high-Q tuned filter, belonging to the field of tuned filter technology. The tuned filter includes two symmetrically arranged resonant cavities, each connected in parallel with an inductor. This invention reduces the current density of a single coil, suppresses high-frequency skin and proximity effects, significantly reduces the high-frequency loss resistance of the inductor, and significantly improves the Q value at the same operating frequency. It directly reduces in-band insertion loss and improves out-of-band rejection depth, resulting in a significant improvement in filtering accuracy and anti-interference capability.

The invention relates to a fuel assembly surface feature detection method, device and system, and the method comprises the steps: obtaining surface image data of a to-be-detected fuel assembly at different exposure times, the surface image data comprising a low exposure image, a normal exposure image and an overexposure image; performing feature fusion on the low-exposure image, the normal-exposure image and the overexposure image by using a global context attention mechanism to obtain a target fusion image; performing image segmentation on the target fusion image by using a U-Net algorithm to obtain line laser features; performing three-dimensional reconstruction on the to-be-measured fuel assembly according to the linear laser features; determining a surface feature detection result of the to-be-detected fuel assembly according to a three-dimensional reconstruction result; the method is used for reducing the influence of factors such as underwater interference, insufficient light and fuel rod surface reflection on linear laser feature extraction, so that the surface feature detection efficiency of the fuel assembly can be improved.