摘要:
Systems and methods for determining locations of wireless sensor nodes in a tree network architecture having mesh-based features are disclosed herein. In one embodiment, a system includes a hub having one or more processing units and RF circuitry for transmitting and receiving communications with sensor nodes to enable bi-directional communications. The one or more processing units of the hub execute instructions to configure the system with a tree architecture for communications between the hub and the sensor nodes, and to configure the system temporarily with a mesh-based architecture for determining location information for the sensor nodes.
摘要:
Systems and methods for implementing power management features while providing a wireless asymmetric network are disclosed herein. In one embodiment, a system includes a hub having a wireless control device that is configured to control communications and power consumption in the wireless asymmetric network architecture. The system also includes a plurality of nodes each having a wireless device with a transmitter and a receiver (or transmitter and receiver functionality of a transceiver) to enable bi-directional communications with the wireless control device of the hub in the wireless asymmetric network architecture. The wireless control device can be configured to determine a scheduled timing of causing the transmitter to be operable to transmit and causing the receiver to be operable to receive for each wireless device to reduce power consumption of the wireless devices of the plurality of nodes.
摘要:
Printed integrated circuitry and attached antenna and/or inductor for sensors, electronic article surveillance (EAS), radio frequency (RF) and/or RF identification (RFID) tags and devices, and methods for its manufacture. The tag generally includes printed integrated circuitry on one carrier and an antenna and/or inductor on another carrier, the integrated circuitry being electrically coupled to the antenna and/or inductor. The method of manufacture generally includes of printing an integrated circuit having a plurality of first pads on a carrier, forming an antenna and/or inductor having a plurality of second pads on a substrate, and attaching at least two of the first pads of the printed integrated circuit to corresponding second pads of the antenna and/or inductor. The present invention advantageously provides a low cost RFID tag capable of operating at MHz frequencies that can be manufactured in a shorter time period than conventional RFID tags that manufacture all active electrical devices on a conventional wafer.
摘要:
Circuits and circuit elements configured to generate a random delay, a monostable oscillator, circuits configured to broadcasting repetitive messages wireless systems, and methods for forming such circuits, devices, and systems are disclosed. The present invention advantageously provides relatively low cost delay generating circuitry based on TFT technology in wireless electronics applications, particularly in RFID applications. Such novel, technically simplified, low cost TFT-based delay generating circuitry enables novel wireless circuits, devices and systems, and methods for producing such circuits, devices and systems.
摘要:
The present invention relates to methods of making capacitors for use in surveillance/identification tags or devices, and methods of using such surveillance/identification devices. The capacitors manufactured according to the methods of the present invention and used in the surveillance/identification devices described herein comprise printed conductive and dielectric layers. The methods and devices of the present invention improve the manufacturing tolerances associated with conventional metal-plastic-metal capacitor, as well as the deactivation reliability of the capacitor used in a surveillance/identification tag or device.
摘要:
A memory cell is provided that includes a first conductor, a second conductor, a steering element that is capable of providing substantially unidirectional current flow, and a state change element coupled in series with the steering element. The state change element is capable of retaining a programmed state, and the steering element and state change element are vertically aligned with one another. Other aspects are also provided.
摘要:
The present invention relates to aqueous liquid compositions in which surfactant system is specifically selected so that it cleanses well, but is mild and adequately foaming. Further the composition tolerate relatively large amounts of emollient (to help mildness) while, surprisingly, showing better stability.
摘要:
A memory cell is provided that includes a first conductor, a second conductor, a steering element that is capable of providing substantially unidirectional current flow, and a state change element coupled in series with the steering element. The state change element is capable of retaining a programmed state, and the steering element and state change element are vertically aligned with one another. Other aspects are also provided.
摘要:
Methods, algorithms, architectures, circuits, and/or systems for managing POR-less integrated circuits are disclosed. The method of validating code from a wireless device can include: (i) broadcasting a signal from a reader to the wireless device, (ii) reading a code transmitted, re-radiated, and/or backscattered from the wireless device, the code having a predetermined quality, characteristic, and/or property, (iii) comparing the code to a reference quality, characteristic, and/or property, and (iv) validating the code when the predetermined quality, characteristic, and/or property matches the reference quality, characteristic, and/or property. Embodiments of the present invention can advantageously provide a reliable approach for validating integrated circuits that do not incorporate a POR circuit, and which therefore may transmit spurious bits of data upon being energized. In addition, embodiments of the present invention advantageously allow an Aloha-type anti-collision function to be implemented in a reader based on POR-less integrated circuits.
摘要:
Multi-mode (e.g., EAS and RFID) tags and methods for making and using the same are disclosed. The tag generally includes an antenna, an electronic article surveillance (EAS) function block coupled to the antenna, and one or more identification function blocks coupled to the antenna in parallel with the EAS function block. The method of reading the tag generally includes the steps of applying an electric field to the tag, detecting the tag when the electric field has a relatively low power, and detecting an identification signal from the tag when the electric field has a relatively high power. The present invention advantageously enables a single tag to be used for both inventory and anti-theft purposes, thereby improving inventory management and control at reduced system and/or “per-article” costs.