摘要:
The present disclosure relates generally to systems and methods for frequency synchronization in a non-hierarchical network. In one example, the method includes receiving, by a node in a wireless non-hierarchical network, frequency synchronization messages from other nodes. The method calculates an average frequency based on the frequency synchronization messages, calculates a control frequency based on the average frequency, and sets an oscillator of the node to the control frequency.
摘要:
A juvenile product includes a frame with a rail, the rail including first and second rail sections, a latch assembly coupling the first and second rail sections and configured to reside in a latched state for an in-use orientation of the rail, and an elastic bias element coupled to the first rail section or the second rail section and configured to be under tension in or near the in-use orientation such that the elastic bias element drives the rail away from the in-use orientation when the rail is near the in-use orientation with the latch assembly not in the latched state.
摘要:
A trailer includes a frame formed of metal and a door seated within the frame. The door is capable of opening and closing relative to the frame. A system is provided for use on the trailer and includes a sensor mounted on the door and a data concentrator. The sensor includes a sensing element, a transceiver and a microcontroller connected to the transceiver. The sensing element is connected to the microcontroller. The microcontroller is configured to receive information from the sensor and use the transceiver to wirelessly transmit information regarding the status of the door. The data concentrator includes a transceiver and a processor connected to the transceiver. The data concentrator is configured to wirelessly receive information regarding the status of the door from the sensor. The sensor is capable of sensing the metal material of the frame for use in determining information as to whether said door is open or closed.
摘要:
A high chair features various modes of adjustability and enhanced utility. The height of the chair can be adjusted using a single hand that engages a rear handle. The height of a seat platform of the chair can be adjusted separately relative to the tray. The tray itself is ergonomically designed for the benefit of the caregiver. A removable tray liner facilitates after-meal clean-up. Wheels on the underside of the tray ease fore/aft adjustment. A pivoting back rest of the chair minimizes rearward shift of the center of gravity of the occupied chair, thus requiring a smaller chair footprint. Further, an accessory bar pivoted to a seat back portion of the chair provides readily accessible entertainment.
摘要:
A rotating internal support for a large hollow structure can include a rigid central truss and two or more annular disks coupled to the truss by support arms. The annular disks can be axially spaced along the longitudinal centerline of the truss, and can be coupled to the support arms by guide rollers that allow the annular disks to rotate about a central axis. The internal support can also include support rods with contact pads that extend axially around the annular disks to contact and support the inner surface of the large hollow structure.
摘要:
A bicycle seat is disclosed which includes a shell (12) to which a mounting rail (16) is attached. The mounting rail (16) is connected by a mounting plate for securing one end of the rail and amounting hole for securing the other end of the rail. The mounting plate and securing hole allow the shell (12) to rock relative to the rail (16) in a plane substantially perpendicular to the axis of the shell (12). The shell (12) also has a rib structure to reinforce the shell.
摘要:
An improved child entertainment device includes a base, supporting legs, and a child support structure. The support legs include a rigid section and a flexible section, the flexible section being located proximate to the base to maximize the up and down and side to side range of motion available to the child. The entertainment achieved by the child is therefore increased.
摘要:
A wireless tractor-trailer point-to-point communication system which includes a coordinator and at least one node. The system may include a plurality of clusters, each of which comprises a plurality of devices such as sensors. One of the devices of each cluster is configured to receive information from the other devices in the cluster, and transmit information to the coordinator. The coordinator not only receives information about the network, but may also be configured to route the information to other networks. The network could be disposed on a tractor-trailer, wherein the devices comprise different sensors, such as pressure sensors, temperature sensors, voltage sensors and switch controls, all of which are located in areas relatively close to each other.
摘要:
A rotating internal support for a large hollow structure can include a rigid central truss and two or more annular disks coupled to the truss by support arms. The annular disks can be axially spaced along the longitudinal centerline of the truss, and can be coupled to the support arms by guide rollers that allow the annular disks to rotate about a central axis. The internal support can also include support rods with contact pads that extend axially around the annular disks to contact and support the inner surface of the large hollow structure.
摘要:
A compact folding high chair has a foldable frame assembly with a front frame section and a rear frame section pivotally coupled to one another at their respective upper ends. The frame assembly is movable to a folded configuration where the front and rear frame sections are spaced a close distance relative to one another. A front and a rear toe surface are provided on the respective lower ends of the front and rear frame sections. The front and rear toe surfaces are spaced a stabilizing distance from one another in the folded configuration. The stabilizing distance is greater than the close distance of the frame sections. The folded high chair can stand upright on the toe surfaces and remain relatively stable even though the frame sections are close to one another when folded.