128results about How to "Reduce the likelihood of accidents" patented technology

The invention discloses a system for preventing gliding during secondary lifting of a crane. The system comprises a load gravity sensor (23), a driving variable sensor, an electronic control unit (25) and a brake driving device, wherein the load gravity sensor detects the load gravity of the crane; the driving variable sensor detects a driving variable signal; the electronic control unit receives a load gravity signal and a driving variable signal, and calculates the value of a lifting driving force according to the driving variable signal; and when the lifting driving force is equal to the load gravity, the electronic control unit operates the brake driving device to release the braking mode of a brake (3). By detecting the load gravity in real time and continuously calculating the lifting driving force F according to the driving variable which is detected in real time, the system can automatically perform matching control according to different loads and different working conditions to ensure that the gliding phenomenon during the secondary lifting of the crane is eliminated, and the safety is improved. Besides, the invention also provides a method for preventing the gliding during the secondary lifting.

The invention relates to air compressor monitoring equipment for remote monitoring on an air compressor unit with a plurality of air compressors, which comprises a data processing device and a displaydevice and is characterized in that the data processing device is used for acquiring status information and parameter information of the multiple air compressors at real time according to a monitoring programme configured in advance and generating corresponding display data and providing the display data for the display device; the display device is used for displaying the status information andthe parameter information of the air compressor correspondingly through a display interface according to the display data. At the same time, the invention also provides an air compressor monitoring system.

The present disclosure relates to a system and method for driving a drawer of a refrigerator. In a system and method for driving a drawer of a refrigerator according to present embodiments, the drawer is always withdrawn or inserted at a preset speed regardless of the weight of food stored inside the storage box, thus increasing reliability of the drawer driving system.

An embodiment of the invention discloses a method and a system for recognizing traffic lights by an automobile data recorder. The method includes acquiring to-be-recognized images captured by a frontcamera of the automobile data recorder; if the to-be-recognized images include traffic light identities is confirmed, recognizing passing indication information in the traffic light identities; providing the passing indication information to on-vehicle users. By the method and the system, the automobile data recorder can have an automatic traffic light recognition function, and the passing indication information of the traffic lights is provided for the on-vehicle users, especially the on-vehicle users with color blindness or color weakness or driving with fatigue, so that traffic safety levelis further improved, and the possibility of accidents is reduced.

The invention discloses a radial drilling machine with a rotary table, which comprises a base, an outer column, an inner column, a rocker arm, a headstock and a rotary table; the rotary table is fixed on the base; the rotary table includes a The cylindrical support seat, the rotating shaft, the rotating plate and the pneumatic brake mechanism on the upper surface of the support seat, the support seat has an inner cavity, the rotating shaft and the pneumatic brake mechanism are all arranged in the inner cavity of the support seat, and the rotating plate is fixed on the top of the rotating shaft; the rotating shaft is driven to rotate by a driver located in the inner cavity; the pneumatic brake mechanism includes a cylinder, a push rod fixed on the piston rod of the cylinder, and a brake block fixed on one end of the push rod; the outer circumference of the rotating shaft is provided with The gear teeth are provided with a block matching with the gear teeth on the brake block. The radial drilling machine with the rotary worktable of the present invention improves the processing efficiency of the radial drilling machine, saves manpower, and reduces the possibility of accidents.

The invention discloses a visual inspection and pre-warning system for a longitudinal tear of a conveying belt and an application method of the conveying belt and belongs to the technical field of on-line testing of coal mining equipment. The visual inspection and pre-warning system for the longitudinal tear of the conveying belt is characterized in that inspection is performed in the manner that an infrared visual sensor system and advanced RISC machine (ARM) framework-based embedded system platform are combined to accurately judge an ongoing longitudinal tear fault and a hidden dangerous source of the conveying belt; and the conveying belt is inspected and pre-warned from two levels so as to guarantee the safe operation of the conveying belt. According to the system, image information is normally acquired under the dark condition, and therefore, the defect that auxiliary backlight needs to be adopted when a common industrial camera is used in traditional visual inspection is avoided, the defects that a traditional visual inspection instrument is complex to install, is serious in energy consumption, cannot be applied to complicated work environments and is not ideal in inspection effect are overcome, the damage degree of the conveying belt is reduced to the maximum limit, the possibility of accident occurrence and hazards brought after an accident occurs are fundamentally reduced, the safe transport of the conveying belt is comprehensively guaranteed, the work cost is reduced, and the work efficiency is effectively improved.

The invention discloses a method for synthesizing 3,4-dinitropyrazole by using a micro-channel reactor. The method comprises the following steps: with pyrazole as a raw material, subjecting pyrazole and a nitric-acetic anhydride system to nitration in the micro-channel reactor so as to synthesize N-nitropyrazole; then with N-nitropyrazole as a raw material, carrying out thermal rearrangement so asto synthesize 3-nitropyrazole; and finally, with 3-nitropyrazole as a raw material, synthesizing 3,4-dinitropyrazole in virtue of a nitric acid-sulfur acid mixed acid system in the micro-channel reactor. According to the invention, the micro-channel reactor is employed, so the adverse outcomes of hardly controllable process, proneness to local overheating which leads to dangers, easy generation of side reactions and the like of convetional tank reactors are avoided, rapid reaction is realized, and direct enlargement can be realized through increase of the number of parallel micro-channel reactors. With the method, the yield of the synthesized 3,4-dinitropyrazole reaches 87.5%, and the purity of the synthesized 3,4-dinitropyrazole reaches 99.8%.

A safety system of automobile comprises a video camera shooting unit for obtaining eye information of driver and a computer for receiving obtained eye information. It is featured as setting a detection unit and alarm unit connected with detection unit on computer for sending out alarm by alarm unit when it is detected out that eye-close time of driver is over a preset time by detection unit.

The invention discloses an upper corner treatment method for a large-dip-angle mining work face. An interval construction method is adopted, that is, each time of construction is completed in the weighting interval of the work face. Specifically, two rows of single supporting pillars are erected at the back of an end supporting frame, and a plurality of segmented isolation walls are arranged at the adjoining position of an upper gate road and a goaf in the direction parallel to an upper gate road roadway at equal intervals; a plurality of flexible air bags are installed beside the segmented isolation walls correspondingly and near the side of the upper gate road; the goaf is grouted; roof pre-splitting is carried out at a side thick hard roof of the goaf; the flexible air bags and the single supporting pillars are detached, and upper corner treatment is completed after the roof is collapsed; and construction is conducted circularly until mining of the work face is completed. Compared with the prior art, the upper corner treatment method for the large-dip-angle mining work face has the characteristics of being easy, convenient and fast to construct, low in labor intensity, good in safety and the like, and is particularly suitable for upper corner treatment of an inclined mining work face with the inclination angle of 30-45 degrees or a steeply inclined mining working face.

The invention discloses an intelligent detection method for transformer winding deformation based on short circuit reactance. The intelligent detection method comprises the following steps of step 1,line connection, step 2, numerical calculation, step 3, calculation of short-circuit impedance, step 4, control group detection and step 5, data comparison, specifically, the appropriate measurement frequency is selected to connect a transformer winding for detection to a low voltage and a low current, and a power meter, a voltmeter and an ammeter are connected to a circuit separately, so that according to the circuit relationship, a wiring diagram is manufactured; and the distribution parameters such as currents, voltages and resistance in the circuit are measured and recorded, since the value of conductance G<10> is much larger than the sum value of internal resistance R<1> and internal resistance R<12>, and the value of total reactance X<10> is much larger than the sum value of reactance X<1> and reactance X<12>, the conductance G<10> and the total reactance X<10> can be ignored during calculation. The intelligent detection method is simple in operation, and data of a measurement group is compared with data of a control group so that the condition of a transformer winding can be diagnosed through clear criteria, and the accuracy of the detection and diagnosis is greatly improved.

A control system and method for the locating and communication equipment carried by bus is disclosed, which can used the GPS and GPRS to implement the visualized monitor to buses and provide the real-time running information to central schedule system, such as running state, running route and current position. The real-time communication and interaction between bus and schedule system, automatic processing, analyzing and comparison to acquired data, and the automatic video and audio bus stop report can be performed.