Abstract: A reflector unit may behave as a retroreflector to reflect light of a selected color. The reflector unit may comprise a first reflector having a first color, a second reflector having a second color, and a mask that either allows incoming light to reach the first reflector and not the second reflector or allows incoming light to reach the second reflector and not the first reflector. An active light unit may emit light of a particular color in response to receiving light. In this fashion, the active light unit may simulate the operation of a reflector. The reflector unit and the active light unit may operate on a bi-directional vehicle.

Abstract: A single-hole ultrasonic detection device for continuous integrity and a rock entry depth of a concrete diaphragm wall and a method using the same are provided. the single-hole ultrasonic detection device includes an apparatus host, an ultrasonic transducer and an ultrasonic signal feedback device, and the apparatus host is respectively connected to the ultrasonic transducer and the ultrasonic signal feedback device via a corresponding one of signal lines, the apparatus host includes an ultrasonic transmitter and an ultrasonic signal collector, the ultrasonic transmitter is configured to generate ultrasonic waves and the ultrasonic waves are transmitted via the ultrasonic transducer, the ultrasonic transducer is configured to collect and recover a reflected wave of the ultrasonic waves, convert signals of the reflected wave of the ultrasonic waves into electric signals, and send the electric signals back into the apparatus host.

Abstract: A system includes a first node, a second node, and a third node, wherein the first node establishes a wireless communication link with the second node to perform wireless communication, and forwards connection information of the wireless communication to the third node; and the third node receives, by listening on the wireless communication link based on the connection information, transmission data sent by the second node to the first node. If an error occurs when the third node receives the transmission data sent by the second node to the first node, the third node interferes with the first node's reception of the transmission data sent by the second node, so that an error is caused when the first node receives the transmission data sent by the second node, and the second node is triggered to perform retransmission.

Abstract: A wireless data transmission method includes sending by an external device a data packet; receiving by a primary device and a secondary device the data packet sent by the external device. When the secondary device does not receive the data packet sent by the external device correctly, sending by the secondary device a feedback signal to the primary device. When the secondary device receives the data packet sent by the external device correctly, not sending the feedback signal. The method further includes detecting by the primary device if the secondary device has sent the feedback signal. When the primary device receives the data packet successfully and detects that the secondary device has not sent the feedback signal, sending by the primary device an ACK signal to the external device; otherwise, sending by the primary device a NACK signal to the external device.

Abstract: Provided are dynamic region division and region passage identification methods and a cleaning robot. The dynamic region division method includes: acquiring environment information collected by a robot when working in a first region; determining whether the robot has completed a work task in the first region, when a presence of a passage entering a second region is determined based on the environment information; and complementing a boundary at the passage to block the passage, when the work task is not completed. According to the technical solution provided by the embodiment of the present application, the occurrence probability of repeated sweeping and miss sweeping is reduced, and the cleaning efficiency is high. In addition, the technical solution provided by the embodiment of the present application relies on the environment information collected during the work, rather than relying on historical map data, so that the environmental adaptability is high.

Abstract: A system includes a first node, a second node, and a third node, wherein the first node establishes a wireless communication link with the second node to perform wireless communication, and forwards connection information of the wireless communication to the third node; and the third node receives, by listening on the wireless communication link based on the connection information, transmission data sent by the second node to the first node. If an error occurs when the third node receives the transmission data sent by the second node to the first node, the third node interferes with the first node's reception of the transmission data sent by the second node, so that an error is caused when the first node receives the transmission data sent by the second node, and the second node is triggered to perform retransmission.

Abstract: A reflector unit may behave as a retroreflector to reflect light of a selected color. The reflector unit may comprise a first reflector having a first color, a second reflector having a second color, and a mask that either allows incoming light to reach the first reflector and not the second reflector or allows incoming light to reach the second reflector and not the first reflector. An active light unit may emit light of a particular color in response to receiving light. In this fashion, the active light unit may simulate the operation of a reflector. The reflector unit and the active light unit may operate on a bi-directional vehicle.

Abstract: The present invention relates to the technical field of Wireless Bluetooth, and in particular to a rapid Bluetooth networking method and system, and Bluetooth earphones. The rapid Bluetooth networking method is applied to a Bluetooth communication system, the Bluetooth communication system includes Bluetooth earphones and a terminal, and the Bluetooth earphones include a master earphone and a slave earphone.

Abstract: An audio data communication method and a wireless audio system are disclosed. The audio data communication method is performed by dual-channel wireless audio equipment that includes a primary audio device, a secondary audio device, and a communication link with an audio source device. The method includes transmitting, by the source device, audio data in a preset time interval to the primary and secondary audio devices. The primary and secondary audio devices generate first feedback information and second feedback information. The first and second feedback information are transmitted to the audio source device based on a Carrier Sense Multiple Access/Collision Avoidance protocol. The disclosed techniques address issues such as information interaction between the primary and secondary audio devices during transmission of the feedback information.

Abstract: A system for charging one or more batteries of a vehicle may include a charging box mounted to a vehicle to facilitate connection to a charge coupler from under the vehicle. The charge coupler may be configured to provide an electrical connection between an electrical power source and the charging box. A vehicle including the charging box may maneuver to a position above the charge coupler, after which electrical contacts of the charging box and the charge coupler may be brought into contact with one another. The charge coupler and/or the charging box may be configured to provide electrical communication between the electrical power source and the one or more batteries, so that the electrical power source may charge one or more of the batteries. Thereafter, the electrical contacts may be separated from one another, and the vehicle may maneuver away from the charge coupler.

Abstract: An integrated light emitting diode (LED) device includes an LED light source coupled to a base. The device also includes a controller coupled to a bottom portion of the base. The device also includes a switch coupled to the controller, the switch toggling the controller. The device also includes a controller box comprising an aperture coupled to the base, the controller box encasing the controller and a portion of the switch, an actuator of the switch extending through the aperture. The device also includes an electrical coupler coupled to a recess of the controller box. The device also includes a lens holder coupled to a top portion of the base. The device also includes a lens coupled to the lens holder.

Abstract: A device for diverting and defoaming with a bent pipe applied to a high head water supply structure includes an inner well, an outer well, a baffle, and a plurality of overflow pipes. The baffle is respectively connected with an outer wall of the inner well and an inner wall of the outer well to form an overflow groove, the top end of the inner well is higher than the baffle to form an overflow weir, one end of the overflow pipe is provided with a first pipe orifice in the overflow groove, the other end of the overflow pipe is communicated with the inner well to form a second pipe orifice, the first pipe orifice is higher than the second pipe orifice, the overflow pipe is bent in the overflow groove to form a first bending part, and the first bending part is higher than the first pipe orifice.

Abstract: An integrated light emitting diode (LED) device includes an LED light source coupled to a base. The device also includes a controller coupled to a bottom portion of the base. The device also includes a switch coupled to the controller, the switch toggling the controller. The device also includes a controller box comprising an aperture coupled to the base, the controller box encasing the controller and a portion of the switch, an actuator of the switch extending through the aperture. The device also includes an electrical coupler coupled to a recess of the controller box. The device also includes a lens holder coupled to a top portion of the base. The device also includes a lens coupled to the lens holder.