11results about How to "Avoid interfering signals" patented technology

The utility model discloses a guide rail ceiling type operating lamp, which has a ranging feedback illumination automatic adjusting technology and comprises a ranging component, an illumination feedback component, a pressure sensing component and the like, and the ranging component comprises a signal transmitting device and a signal receiving device and can adopt laser as transmitting and receiving signals. When the emitted laser is blocked by an obstacle (such as a surgical site of a patient) and then scattered, part of scattered light is received by the signal receiving device, and the signal receiving device can measure the distance between the surgical lamp and the surgical area of the patient and send the distance to the illuminance feedback assembly. The illumination feedback assembly automatically feeds back and corrects the brightness of a light source of the operating lamp after receiving the distance data, the pressure sensing assembly is generally located on the outer surface of a middle handle of the operating lamp, and when a doctor holds the middle handle to move a lamp holder, a pressure sensing device responds to enable the distance measuring assembly to be activated and the pressure to be eliminated, and the whole system does not work any more.

The invention discloses a series fault arc identification method suitable for a low-voltage alternating-current power distribution system, which is different from a traditional fault arc detection method and comprises the following steps of: judging whether an arc fault occurs in a line or the line is in a normal state by using zero-sequence current as a detection signal; according to the method, the selected characteristic quantities accurately describe four stages of arc starting, arc burning, arc extinguishing and zero stopping of the fault arc, and a good fault arc detection effect is achieved for a low-voltage alternating-current power distribution system with complex scenes including multiple loads, multiple arc generation modes, multiple line topologies and the like.

The invention relates to the technical field of electromagnetic construction, in particular to a complex electromagnetic environment construction system which comprises a data acquisition module, a judgment module, a signal adjustment generation module and a correction module. The system can dynamically analyze the relative distance and communication frequency between the targets and generate targeted interference and camouflage signals by accurately monitoring the real-time coordinates, the communication signal strength and the grid number of each target, and the signal adjustment and generation module changes the electromagnetic environment around the target by adjusting the signal strength of the grid where the target is located, so that the target interference and camouflage effect is improved. Therefore, accurate interference or camouflage is carried out on a specific area, the influence on a non-target area is avoided, meanwhile, the correction module can adjust the grid spacing in real time according to the change of a camouflage signal, and it is ensured that the system keeps efficient electromagnetic regulation and control capacity in a complex environment. The problems of unstable simulation result and insufficient adaptability caused by high signal simulation randomness and low environment complexity are effectively solved.

The application discloses a pipe force valve with an anti-seismic protection structure, which comprises a valve body, a valve plate body, a valve rod body, a top rod shaft sleeve and a diaphragm body, the valve rod body is connected through the inside of the valve body, one side of the valve rod body is fixedly connected with the valve plate body, the upper end of the valve body is fixedly connected with the top rod shaft sleeve, and the inside of the top rod shaft sleeve is fixedly connected with the diaphragm body. The pipe force valve with the anti-seismic protection structure, when the pipe force valve body is impacted by the outside, the shell is extruded to one side of the valve body, the telescopic rod starts to contract, and the extrusion buffer air bag is extruded, at this time, the buffer air bag is buffered, when the shell moves inward, the buffer spring is compressed synchronously under the action force, and the impact force is secondarily buffered, so that the pipe force valve is less likely to be damaged under the external impact force, and the possibility of affecting the normal work of the valve is reduced.

A high-compatibility multifunctional lighting device comprises a first rectifier module, a signal isolation module, an electromagnetic compatibility module, a post-stage constant current module, a second rectifier module and a load. The first rectification module is connected with a first live line input end and a first neutral line input end of an external power supply. The signal isolation module is connected with the first rectification module. The electromagnetic compatibility module is connected with the signal isolation module. And the post-stage constant current module is connected with the electromagnetic compatibility module. The second rectification module is connected with a second live wire input end and a second neutral line input end of the external power supply, is connected with the post-stage constant current module, and is connected in parallel with the first rectification module. And the load is connected with the post-stage constant current module.

The invention discloses a machine tool cutter state monitoring method and device and a machine tool, and belongs to the technical field of machine tools. The machine tool cutter state monitoring method comprises the steps that a main shaft power curve of a machine tool in the machining process is obtained, and K speed modal signals corresponding to the main shaft power curve are obtained; acquiring a characteristic data segment of each speed modal signal in the K speed modal signals; obtaining a load mean value of each feature data segment in the K feature data segments in the N processing samples, and obtaining a load mean value sequence corresponding to each feature data segment in the K feature data segments; obtaining a load mean value sequence corresponding to each feature data segment in the K feature data segments and a Pearson's correlation coefficient corresponding to the tool life, and obtaining a Pearson's correlation coefficient sequence including K Pearson's correlation coefficient values; and determining a target feature data segment from the K feature data segments based on the Pearson's correlation coefficient sequence, and determining the cutter state of the machine tool based on the target feature data segment.

The present invention provides a coreless power divider and a method for setting the phase. The power divider includes: an input end, an external load end, a first output end, a second output end, a first coil, a second coil, a first capacitor and a second capacitor, wherein the first coil is connected between the input end and the first output end; the second coil is connected between the external load end and the second output end; the first coil and the second coil are coils within a preset number of windings, and there is a hollow limiting cavity between the first coil and the second coil, and the cross-sectional area of ​​the limiting cavity is a preset area, and the preset number of windings and the preset area have a preset corresponding relationship. The method includes winding two coils with a preset number of windings to form a first coil and a second coil; adjusting the cross-sectional area of ​​the limiting cavity of the first coil and the second coil according to the preset area. The coreless power divider and the method for setting the phase provided by the present invention enable the phase value of the power divider to be any set phase, meeting social needs.

The invention discloses a frequency conversion signal-based direct current system fault detection device and a detection method thereof. The device comprises a signal source module, a mobile fault detection module and a split core type current transformer module. The detection method comprises the following steps: acquiring bus-to-ground waveform amplitude data of the direct current system and ground insulation state data of the direct current system; acquiring a variable-frequency current characteristic signal of the direct-current system; and judging according to the bus-to-ground waveform amplitude data of the direct current system, the ground insulation state data of the direct current system and the variable frequency current characteristic signal of the direct current system to obtain a ground fault judgment result of the direct current system. According to the embodiment of the invention, the induction of feeder characteristic signals can be improved, the influence of interference signals can be reduced, and more accurate DC system grounding fault detection and positioning can be realized. The method can be widely applied to the technical field of direct-current grounding fault searching.

The invention relates to the technical field of satellite navigation, and particularly discloses a satellite navigation in-orbit autonomous programming anti-interference method and system, and the method comprises the steps: obtaining a mixed signal which comprises a navigation satellite broadcast signal and a narrowband interference signal; constructing a multi-band signal library; enabling the mixed signal to pass through a band-pass filter, judging whether the band-pass filter can recover the navigation satellite broadcast signal, and if the band-pass filter can recover the navigation satellite broadcast signal, broadcasting the navigation satellite broadcast signal to a user; and if the broadcast signal of the navigation satellite cannot be recovered, calling a multi-band signal library based on in-orbit autonomous programming, autonomously selecting a frequency point with the largest difference with the frequency point of the narrowband interference signal from the multi-band signal library as the broadcast signal of the navigation satellite, and broadcasting the broadcast signal of the navigation satellite to a user. According to the method, the time-frequency characteristic of the navigation signal is intelligently adjusted from the multi-band signal library according to the real-time interference condition, so that the interference signal is avoided, and the normal operation of the GNSS system is ensured.

The application provides an overcurrent detection circuit and a clothes processing device, and belongs to the field of home appliance control. A sampling module is connected with an intelligent power module, collects three-phase current signals, and obtains bus detection signals. A signal processing module is connected with the sampling module, compares the bus detection signals with reference voltage signals, obtains a comparison result signal, converts the comparison result signal, and obtains an overcurrent detection signal. The signal processing module is connected with the intelligent power module, and sends the overcurrent detection signal to the intelligent power module. The overcurrent detection is indirectly realized through the circuit, the collected three-phase current signals and the overcurrent detection signal are fully signal-isolated, the isolation between different signal ports of the intelligent power module is realized, and the problem of low overcurrent detection accuracy of the traditional circuit is solved.

The utility model discloses an intelligent ceramic insulator which comprises an insulator body (1), the insulator body (1) is hollow, and a high-voltage capacitor (2) and an acquisition circuit board (3) are fixedly installed at the two ends of the interior of the insulator body (1) respectively. The acquisition circuit board (3) is integrated with a power supply management circuit module (301), an envelope taking circuit module (302), a main control circuit module (303), a LoRa wireless communication module (304) and an onboard LoRa antenna (305) which are connected in sequence; and the high-voltage capacitor (2) is electrically connected with the power management circuit module (301). According to the utility model, through the built-in sensor for acquiring signals, electricity is taken from the high-voltage capacitor in the insulator and the signals are acquired, and the acquired signal data is sent to the background gateway through the built-in LoRa wireless module, so that the problem that in the prior art, when the sensor and the ceramic insulator are connected through a cable, the cable senses a space interference signal, and the signal data are transmitted to the background gateway through the LoRa wireless module is solved. And meanwhile, the installation and maintenance of the battery are avoided.