49results about How to "Avoid communication interference" patented technology

The invention discloses a terminal and a method for two-way live sharing and intelligent monitoring. Wherein, the terminal includes: a camera, an audio collection unit, a display, a loudspeaker, and a transceiver, wherein the transceiver sends the video and audio collected by the camera and the audio collection unit to a specific address in real time through a dedicated channel, and transmits the video and audio collected by the audio collection unit through a dedicated channel. Receive the video and audio from the specific address in real time and output them through the display and speakers respectively, and identify people or specific people, or specific actions, or abnormal conditions in response to the video and audio collected from the camera and audio acquisition unit respectively , the transceiver sends reminder information to the specific address in real time, wherein the dedicated channel is established in advance, and the terminal is used in a trusted fixed place. Compared with the prior art, the present invention improves the user's real-time communication experience, and is beneficial for the user to more conveniently and safely monitor the on-site situation of a specific place or a specific person.

The invention discloses a method for communication between a vehicular radio-frequency identification card and a wireless base station. The wireless base station is provided with a wake-up channel, a field positioning channel and a plurality of data channels, which work independently; the vehicular radio-frequency identification card is provided with a wake-up channel, a field positioning channeland data channels, which correspond to each channel of the wireless base station; the wake-up channel of the wireless base station transmits a wake-up code, and the vehicular radio-frequency identification card receives the wake-up code by the wake-up channel of the vehicular radio-frequency identification card; the field positioning channel of the wireless base station transmits a field positioning code, the vehicular radio-frequency identification card receives the field positioning code by the field positioning channel of the vehicular radio-frequency identification card, and one data channel of the vehicular radio-frequency identification card reports data to the corresponding data channel of the wireless base station after the field positioning channel of the vehicular radio-frequency identification card receives the field positioning code. Because each channel of the wireless base station works independently, the vehicular radio-frequency identification card selects one data channel to report the data, so that communication information between the vehicular radio-frequency identification card and the wireless base station is not easy to lose, and the anti-jamming capability is high.

The present invention relates to an apparatus for optical communication for an elevator, the apparatus reducing the optical communication distance to the shortest distance and comprising: a data transmitter (10) installed on the wall or ceiling of the hall in front of an elevator shaft; a data receiver (30) installed behind a hall button cover (20) of a building elevator and connected wirelessly to the data transmitter (10) to receive digital data therefrom; an antenna (32) built into the hall button cover (20) and connected to the a data receiver (30); an optical communication transmitter (40), connected by wire to the a data receiver (30) and installed on the wall of the elevator shaft (P), for converting digital data to optical data and transmitting the latter; an optical communication receiver (50), installed in the elevator (E) at a location facing the optical communication transmitter (40) when the elevator (E) is stopped to allow passengers to get in and out, for receiving data the optical communication transmitter (40) by means of wireless optical communication; a controller (C), connected by wire to the optical communication receiver (50) and a control room and installed in the ceiling of the elevator (E), for receiving data from the optical communication receiver (50) to convert into image data, and being controlled by the control room; and a monitor (M), connected by wire to the controller (C) and installed on the door, wall or ceiling of the elevator (E), for receiving and displaying image data from the controller.

The embodiment of the invention discloses a mobile terminal shielding method and an interference base station. The method comprises the following steps: if the interference base station judges that the shielding triggering condition is satisfied, the shielding control parameter and the shielding service type corresponding to the target area are obtained; replacing the initial control parameter inthe broadcast message with the shielding control parameter, and sending the broadcast message to the mobile terminal in the target area so that the mobile terminal in the target area preferentially selects the interfering base station to establish the communication connection; if the access request sent by the mobile terminal according to the shielding control parameter is received, the access request corresponding to the mobile terminal in the shielding terminal whitelist is responded to according to the preset shielding terminal whitelist, and the mobile terminal is shielded according to theshielding service type after the communication connection is established. By applying the scheme of the invention, the service shielding of the mobile terminal to be shielded can be realized and thecommunication interference to the mobile terminal without shielding can be reduced at the same time.

The invention provides a cooperative control device of a distributed photovoltaic grid-connected generation system. The device is composed of a single centralized grid-connected inverter and the common direct current bus of a number of MPPT combiner boxes. A voltage coding module is added in a centralized grid-connected inverter. The voltage coding module is located on the common direct current bus on the single centralized grid-connected inverter side. One end is connected with the direct current bus, and the other end is connected with a number of MPPT combiner boxes. Each MPPT combiner box is added with a voltage decoding module, and the voltage decoding module is located on the direct current bus on the combiner box side. A number of voltage decoding modules are correspondingly connected with a voltage coding module. The voltage coding module outputs the common direct current bus voltage reference value for adjusting the inverter to the inverter CPU according to the current instruction of the centralized grid-connected inverter. The voltage change of the common direct current bus is controlled, and the adjustment instruction is transmitted to the MPPT combiner boxes in the form of voltage. The voltage decoding modules identify the issued dispatch instruction according to the voltage of the direct current bus of the combiner boxes and output a control instruction, and the combiner boxes execute the control instruction.

The present invention relates to a wireless communication method that utilizes multiple frequency bands to avoid noise interference. Specifically, it involves a method of constructing a normal wireless communication link by using two or more communication modules with different available frequency bands or different communication methods to avoid various noises from interfering with the communication during the communication process between the unmanned transfer device and the manufacturing equipment. Multi-band wireless communication method to avoid noise interference.

The invention belongs to the technical field of automobile testing, particularly relates to a system for testing field performance of a tire pressure monitoring system (TPMS) and aims at solving the problem that field performance of an automobile cannot be tested during road driving in the prior art. The system is characterized by comprising an actuator and a controller, wherein the actuator is used for measuring the internal pressure of all tires in real time and transmitting pressure signals to the controller, and signals indicating tire pressure in a driving state are generated under the control of control signals of the controller; the controller receives the tire pressure signals sent from the actuator, the tire pressure signals are processed according to set control flow, and then control signals are sent to the actuator to control the actuator to act to complete measurement and regulation of tire pressure. According to the system provided by the invention, a tire pressure closed-loop control system based on a practical gas circuit is established by virtue of the actuator and the controller, closed-loop regulation is performed on the gas circuit according to a difference between target tire pressure and current tire pressure, and thus a driving pressure regulation function is achieved under the condition of generating no communication interference.

The invention discloses a lifting tool system capable of realizing lithium battery power supply and wireless communication, which can reduce a reeling mechanism in a crane in the prior art and does not need cables, so that the whole machine is relatively simple in structure and relatively low in cost, and which can also avoid the problem of communication interference in a CAN system in the prior art. The technical scheme is that: the lifting tool system comprises a lithium battery power supply device and a wireless communication device, wherein the lithium battery power supply device comprises a lithium ion battery pack, an inverter, a filter and a voltage transformer; the lithium ion battery pack directly supplies power to a lifting tool motor after subjected to the inversion treatment of the inverter; the lithium ion battery pack, as a control power supply, supplies power to a lifting tool after subjected to the inversion treatment of the inverter, the filtering treatment of the filter and the voltage reduction treatment of the voltage transformer; the wireless communication device comprises a gateway module, a controller local-area network bus and a wireless module; the controller local-area network bus is connected with the wireless module through the gateway module and connected to a lifting tool controller through the Ethernet.