69results about How to "Avoid the risk of collapse" patented technology

A measurement, launch and control long-distance data transmission system is used for long-distance data communication of the spaceflight measurement, launch and control system. The measurement, launch and control system is divided into back-end and front-end, and the two are connected by optical fiber. The back-end of the measurement, launch and control system is composed of a back-end PLC combination, a central computer, a virtual display computer and an instruction input module. The back-end PLC combination realizes the long-distance communication with the front-end of the measurement, launch and control, receives the switch signal from the central computer and the command input module, and feeds back the status information obtained by the back-end PLC combination to the virtual display computer for display. The front end of the measurement and control system is the front-end PLC combination. On the one hand, it receives control instructions from the back-end PLC combination to control the measured object to complete the corresponding work. On the other hand, it sends the status information of the front-end PLC combination to the back-end PLC combination. The front-end and back-end PLC combination of the measurement, launch and control system realizes front-end and back-end data transmission by building a Controller Link network.

The invention discloses a post-tensioning method for pre-tightening a heavy-duty prestressed structure. The post-tensioning method comprises the following steps that 1, a mold is consistent with the final size pre-tightened by a pre-tightening winding structure is manufactured, a tension-free steel wire layer winds the mold, and the steel wire layer ring is taken out from the mold; 2, a steel wirelayer ring is heated so as to enable the steel wire layer ring to be attached to the winding structure to be pre-tightened after thermal expansion, the steel wire layer ring which sleeves the windingstructure to be pre-tightened is continued to be heated, and an auxiliary load is applied to the movable end of the winding structure to be pre-tightened to enable the steel wire layer ring to extend; 3, a cushion block group is placed between the movable end and the fixed end of the winding structure to be pre-tightened; and 4, the steel wire layer ring is cooled, and the pre-tightening of the winding structure to be pre-tightened is completed. The post-tensioning method can be suitable for the general heavy structure, the auxiliary load is easy to achieve, the unbalance loading phenomenon is avoided, and the risk of collapse of the pre-tightening winding structure is avoided.

The invention discloses an OB vehicle for producing and broadcasting ultra-high-definition programs in the technical field of outdoor rebroadcasting. An operating platform is connected in rotation, a storage box is fixedly connected to the bottom of the compartment, and an electric door symmetrically front and rear is connected to the bottom of the compartment to cover the storage box; by setting a lifting rod, the motor drives the first base to the Moving in the middle, the first base drives the lifting rod to turn upwards. The lifting rod lifts the conference table upwards through the second base, so that the conference table placed in the storage box moves upwards, and the raised conference table facilitates the unfolding of the conference, so that the conference table can be provided quickly when the meeting needs to be held It is used for meetings, and the conference table can be stored in the car after the meeting, which will not hinder the usual broadcast work, and achieve the effect of saving space in the car.