56results about How to "Reasonable distance" patented technology

A transceiver preferably embedded within a wearable security watch, PDA, or other device which achieves a variety of wireless ultrasonic and / or radio-frequency based functions, including digital identification and proximity and sensation monitoring of assets, individuals, pets, and the like. The portable or wearable device realizes these functions by periodically polling and receiving information tags within the transmitting distance of the device. The invention can help reduce the likelihood of the theft, loss, or misplacement by detecting that a tag associated with or attached to an entity has left an individual's proximity and sounding an alarm. The device can also assist individuals with sensory impairments, including persons who are deaf, diabetic, and the like, by detecting a tagged entity as it enters the space around an individual, or by detecting environmental stimuli, such as excessive heat in an individual's proximity or vital sign changes, and sounding an alarm.

A transceiver preferably embedded within a wearable security watch, PDA, or other device which achieves a variety of wireless ultrasonic and / or radio-frequency based functions, including digital identification and proximity and sensation monitoring of assets, individuals, pets, and the like. The portable or wearable device realizes these functions by periodically polling and receiving information tags within the transmitting distance of the device. The invention can help reduce the likelihood of the theft, loss, or misplacement by detecting that a tag associated with or attached to an entity has left an individual's proximity and sounding an alarm. The device can also assist individuals with sensory impairments, including persons who are deaf, diabetic, and the like, by detecting a tagged entity as it enters the space around an individual, or by detecting environmental stimuli, such as excessive heat in an individual's proximity or vital sign changes, and sounding an alarm.

The invention provides an elastic polishing device and method for a special-shaped workpiece and belongs to the technical field of polishing. The elastic polishing device for the special-shaped workpiece comprises a base frame, a master control circuit storing three-dimensional data of the special-shaped workpiece, at least four polishing units and a driving mechanism; the polishing units are symmetrically arranged on the two sides of the base frame and form a symmetry line; and the driving mechanism is controlled by the master control circuit to drive the polishing units to get close to or be far away from the symmetry line so as to adapt to different sizes of different portions of the workpiece. Each polishing unit comprises a support, a mandrel, a polishing wheel and a spring capable of making the polishing wheel elastically move on the support, and further comprises a hardness detecting device used for detecting the workpiece, a motor driving the polishing wheel to rotate and a three-dimensional scanning device; and data generated by the three-dimensional scanning device are transmitted to the master control circuit to make the driving mechanism drive the polishing units to move relative to the symmetry line. The elastic polishing device for the special-shaped workpiece has the beneficial effects that each polishing unit can be flexibly and conveniently controlled, polishing is performed according to different materials, and the polishing effect is good.

A swing arm style tire changer includes a base (1), a workbench (2), an upright stem (12), a swing arm (10) and a dismounting head (14). The swing arm (10) is attached to the upright stem (12) and is capable of rotating horizontally. The swing arm style tire changer also includes a first helper arm (11) connected to the swing arm (10); under said first helper arm (11) and connected thereto is a tire-pressing wheel (15) that may be moved vertically upwards and downwards. The first helper arm (11) is attached to the swing arm (10) and is capable of rotating horizontally, and a pneumatic cylinder (8) is arranged on said first helper arm (11). The swing arm style tire changer also includes a second helper arm (7).

The invention discloses a toppling-prevention drawer chest which comprises a chest body, drawers and supporting foot driving assemblies. The supporting foot driving assemblies are used for driving supporting feet to act. Any layer of drawers is provided with a connecting rod limiting device and an elastic convex block, and when the drawers are opened, the connecting rod limiting device on the layer of drawers can drive the supporting feet to extend out of the chest body; when the drawers are closed, and the finally closed drawers control retraction of the supporting feet through the elastic convex blocks. The toppling-prevention drawer chest achieves that any layer of drawers can control out-drawing of the supporting feet, the out-drawing distances of the supporting feet are controlled bythe drawers having maximum out-drawing distances; when the drawers are closed, the finally closed drawers flexibly control the supporting feet to retract through the elastic convex blocks.

The invention discloses a tool-free mounting structure of a fan connector, the mounting structure specifically comprises a fan frame and the fan connector, the fan connector comprises a male head and a female head, a first avoiding hole is formed in the front side wall of the fan frame, and the front end of the female head penetrates through the first avoiding hole and extends to the front side of the fan frame. A limiting structure is arranged at the rear end of the female head, a first limiting column is arranged on the portion, located on the front side of the limiting structure, of the female head, the front side wall of the fan frame is clamped between the first limiting column and the limiting structure, and a second receding hole used for allowing the first limiting column to penetrate through is formed in the front side wall of the fan frame. The left end and the right end of the rear side face of the male head are respectively provided with a second guide inclined face matched with the female head. According to the mounting structure, tool-free mounting of the fan connector female head can be achieved, the fixing structure is reliable, the working efficiency can be improved, and later maintenance is facilitated.

The invention discloses a routing method based on distance weighting and its node routing function module. The node routing function module includes: Radacat CPU, GPS / Beidou module, map module, weighted distance calculation module, routing table module and RF transceiver module , the GPS / Beidou module, the map module, the weighted distance calculation module, the routing table module and the RF transceiver module are connected to the Radacat CPU. The present invention calculates a reasonable wireless communication distance through weighted calculation, and can more accurately display the relative distance between two nodes. In the distance forwarding protocol based on GPS position assistance, using this technology is more reasonable and more accurate. It can make the Mesh network forward more accurate correct forwarding messages.

The invention discloses a main current-carrying contact system, comprising: an upper mounting plate; a lower mounting plate connected to the upper mounting plate through a first liner; a first bearing bracket fixed on the lower mounting plate , the first bearing bracket has a first bearing; the second bearing bracket is fixed on the upper mounting plate, and the second bearing bracket has a second bearing; the rotating shaft is connected with the first bearing and the second The bearing is connected; the driving disc is connected with the rotating shaft through a key; the main contact is connected with the driving disc. The structure of the main current-carrying contact system of the present invention is simple, and it can cooperate with the program requirements of the on-load tap changer to operate in a relatively large range. The rotation angle is small, and the opening distance in the middle process of disengaging and closing is reasonable. At the same time, the locking circle structure effectively guarantees the reliable operation of the mechanism.