7results about How to "Realize two-way communication" patented technology

The invention discloses a fire-fighting long-distance ad hoc network full-duplex voice communication system, which relates to the technical field of voice communication, and realizes whole-staff real-time voice acquisition through cooperative work of a microphone array module, a noise sensing module, a noise filtering module, a communication state evaluation module and a signal gain adjustment module. Two-way voice communication between firefighters and between the firefighters and a command center is ensured, in a fire rescue site, the noise sensing module can accurately recognize various background noise in a fire environment, such as explosive sound or equipment operation sound, and noise interference areas are classified and marked in time. The noise filtering module can dynamically adjust the noise suppression coefficient according to the noise type and intensity through a self-adaptive noise suppression algorithm, interference signals are effectively removed, and through real-time and dynamic noise suppression, firemen can clearly receive command information in a complex environment, and misunderstanding or communication faults caused by noise interference are reduced.

The present invention provides a shaft-controlled two-way cartridge valve distribution radial piston hydraulic device and a working method, comprising a housing, a main shaft rotatably arranged on the housing, a shaft rotatably arranged on the housing, a plurality of plunger assemblies, a first two-way cartridge valve corresponding to each of the plunger assemblies, and a second two-way cartridge valve corresponding to each of the plunger assemblies; the shaft-controlled two-way cartridge valve distribution radial piston hydraulic device adopts two-way cartridge valve distribution, providing a new distribution method, thanks to the excellent sealing and large valve port diameter advantages of the two-way cartridge valve, the device can be used in a high-pressure and large-flow environment; because the opening and closing of the valve port of the two-way cartridge valve can be modulated, compared with an ordinary one-way valve, the two-way cartridge valve can realize two-way conduction of oil, solving the limitation of valve distribution in the motor.

The invention discloses a downhole flow testing device, and belongs to the technical field of downhole flow testing, the downhole flow testing device mainly comprises a hollow shell, a supporting pipe arranged in the shell and a lining arranged on the inner wall of the supporting pipe, the shell comprises an upper connector and a lower connector, a battery cavity is defined between the upper connector and the supporting pipe, and the lower connector is arranged in the battery cavity. A battery cavity is formed in the upper connector, a battery rack is installed in the battery cavity, a battery pack is arranged on the battery rack, a clamping groove is formed in the lower portion of the battery cavity, a circuit board is installed in the clamping groove and electrically connected with the battery pack, an eccentric hole is formed in the upper connector, a cable head is installed in the eccentric hole, and the upper end of the cable head is connected with a steel pipe cable. The lower end is electrically connected with the circuit board. Two power supply modes are provided, and the working stability of the electrode is guaranteed.

The utility model discloses a single-wire communication circuit capable of performing level conversion, which comprises a first CPU (central processing unit) and a second CPU, and a first circuit module and a second circuit module are correspondingly arranged in the first CPU and the second CPU; the first circuit module comprises a first sending module and a first receiving module, the first sending module and the first receiving module are connected in parallel, the second circuit module comprises a second sending module and a second receiving module, and the second sending module and the second receiving module are connected in parallel; at least the first sending module and the second sending module are provided with level conversion units; a parallel main line of the first sending module and the first receiving module and a parallel main line of the second sending module and the second receiving module are respectively connected with an external single-line communication port FRB; when the first sending module communicates with the second receiving module, and when the second sending module communicates with the first receiving module, level conversion can be carried out on communication signals.

The invention discloses a method and system for solving gas safety alarm control in a bidirectional wireless mode. The method comprises the steps that a gas leakage sensor of a gas alarm monitors whether gas leakage occurs or not; if a gas leakage sensor of the gas alarm monitors gas leakage, a first signal transmitting module of the gas alarm transmits gas leakage information to a second signal receiving module of a leakage prevention device mounted on a gas pipeline; a second signal transmitting module of the anti-leakage device transmits a first feedback signal to a first signal receiving module of the fuel gas alarm and feeds back received fuel gas leakage information, and meanwhile, a controller of the anti-leakage device controls a motor valve of the anti-leakage device to be closed to disconnect a fuel gas pipeline so as to prevent fuel gas leakage; a second signal receiving module of the anti-leakage device uploads the gas leakage information to the cloud platform; and meanwhile, the MCU of the gas meter controls the valve of the gas meter to be closed so as to prevent gas leakage. The anti-leakage device is good in anti-leakage effect and good in accuracy.

The application provides a battery management system and a battery management system control method, which comprise a master control module and a slave control module, the master control module comprises a sending circuit, an isolation circuit, a rectifier circuit and a comparison circuit, and the slave control module comprises a sending circuit, an isolation circuit, a rectifier circuit and a comparison circuit; the sending circuit is electrically connected with the isolation circuit and is used for transmitting a voltage input signal of the module where the sending circuit is located to the isolation circuit of the module; the isolation circuit is used for being communicatively connected with the isolation circuit in other modules and transmitting data in a superposition form; the rectifier circuit in the master control module or the slave control module is electrically connected with the isolation circuit and is used for rectifying an electric signal when the electric signal is received by the isolation circuit; and the comparison circuit in the master control module or the slave control module is electrically connected with the rectifier circuit and is used for receiving a signal input by the rectifier circuit, so that bidirectional communication of the master control and the slave control is realized.

The present invention discloses an intelligent selective wireless data transmission relay system, wherein a master station wirelessly communicates with at least one slave station through a relay system, the relay system is provided with at least one repeater, the repeater participates in wireless networking, at least one address segment is provided in the repeater, and each address segment stores the address of at least one target slave station; the master station realizes communication with the target slave station corresponding to the address segment through the relay system; selective forwarding of the master station or the target slave station is realized, unnecessary data transmission is reduced, and the burden of the relay system is alleviated; the selective forwarding of data avoids useless data transmission, reduces power consumption, and realizes stable operation of the relay system; by setting up dual transceivers, two-way communication between the master station and the slave station is realized, data delay is reduced, and the interaction of uplink and downlink data is rapid, which has good market application value.