82 results about "Ultrasonic communication" patented technology

A system for wireless communication using ultrasonic signals that includes a transmission module, which receives input signals from a wireless device, modifies the received input signals in a manner that converts each received input signal into a corresponding ultrasonic signal and wirelessly transmits each said ultrasonic signal over an ultrasonic link, and a receiving module, which receives the transmitted ultrasonic signals, recovers the corresponding input signals therefrom and enables outputting each respective input signal through one or more output devices. Modification of the input signals may include compressing, encoding and modulating the input signals. The input signals may be voice audio signals for enabling to use the system for supporting phone calls by enabling ultrasonic communication between for instance, a wireless headset and a mobile phone. Transmission and receiving modules may be associated with a wireless headset and mobile phone for allowing ultrasonic and optionally RF communication therebetween.

The invention provides a mobile terminal ultrasonic communication system. The system comprises at least one ultrasonic generator and at least one mobile terminal, wherein the ultrasonic generator is arranged at a specific position for transmitting an ultrasonic wave with pre-modulated data parameters; the mobile terminal is used for demodulating the received ultrasonic wave and acquiring preset information; the mobile terminal further comprises a microphone and a demodulation module; the microphone is used for receiving the ultrasonic wave transmitted by the ultrasonic generator; and the demodulation module is connected with the microphone, and used for reducing waveform of the ultrasonic wave which is received by the microphone and demodulating the data preset in the ultrasonic wave. The mobile terminal ultrasonic communication system has the advantages of low cost, convenience in arrangement, high flexibility and high adaptability.

A hearing system has a first device and a second device. The first device acoustically couples to skin of a user of the hearing system and includes a sensor to detect acoustic signals. The second device includes a hearing stimulator arrangement to stimulate hearing of the user in response to the acoustic signals detected with the first device. The first device and second device are each operable to bidirectionally communicate through an ultrasonic communication link comprising at least a portion of the body of the user.

The invention discloses a measuring method for network nodes of an underwater wireless sensor and a device. The method comprises the steps of: carrying out the interconversion of an electric signal and an ultrasonic signal by utilizing an ultrasonic transducer so as to complete underwater ultrasonic communication; calculating the relative distance between the nodes and the device by utilizing the transmission delay between node communication as well as the propagation velocity of ultrasound underwater; and collecting the underwater environmental data information from the position of the nodes by utilizing a sensor specially used in underwater detection. The device comprises a microcontroller, an FSK modulating and power amplifying module and a transducer which are connected in series; a hydrophone, a weak signal amplifier, an FSK demodulating chip and a microcontroller which are connected in series; a power management module is used for supplying power for a circuit and managing a power supply; and an external spreading interface module is used for connecting with a corresponding interface sensor and peripherals. The invention realizes the underwater sound communication function with low cost and low power consumption and the distance measuring function between the network nodes of the underwater wireless sensor.

The invention relates to a bored pile pore-forming quality detecting device. A fluid density signal input interface, an ultrasonic communication interface and a three-dimensional posture interface of a pore-forming detecting host of the bored pile pore-forming quality detecting device are sequentially connected with a fluid density sensor, an ultrasonic launching and receiving sensor and a three-dimensional posture sensor through cable transfer nodes of a take-up and pay-off spool and a cable bus. The cable bus is wound around the take-up and pay-off spool and controlled to be taken up and paid off by the take-up and pay-off spool, the cable bus is taken up and paid off on a depth counting pulley, the depth counting pulley records the take-up and pay-off length of the cable bus, and the depth feedback signal output end of the depth counting pulley is connected with the pore-forming detecting host. A GPS sensor is located over a probe, and the signal output end of the GPS sensor is connected with the GPS signal input end of the pore-forming detecting host. The bored pile pore-forming quality detecting device can detect parameters such as pore diameters, pore depths, perpendicularities, whole-pore mud densities, dreg thicknesses, boring inclination directions and pore opening coordinates of bored pile formed pores, and the bored pile pore-forming quality reliability is ensured.

An ultrasonic communication system and method provide a networking framework for wearable devices based on ultrasonic communications. The ultrasonic communication system and method incorporate a set of physical, data link, network and application layer functionalities that can flexibly adapt to application and system requirements to efficiently distribute information between ultrasonic wearable devices.

Implantable and wearable devices and system for transmitting signals ultrasonically through biological tissue are implemented based on an Internet of Medical Things (IoMT) platform software and hardware architecture. The devices are size-, energy-, and resource-constrained and implement ultrasonic communication protocols and communicate with each other through ultrasound.

The invention relates to an ultrasonic measured and controlled water distributing device which solves the difficult problems of complicated allocation operation, low efficiency, limited application and the like existing in the prior art. The ultrasonic measured and controlled water distributing device comprises a sleeve pipe, a centralizer, a water-plugging packer, an ultrasonic measured and adjusted water distributor, a ball seat, a screen pipe and a screwed plug and is technically characterized in that underground ultrasonic communication units which are connected with a measurement and adjustment control unit are arranged in the ultrasonic measured and adjusted water distributor in the sleeve pipe, the measurement and adjustment control unit is respectively connected with an ultrasonic flow sensor, a pressure sensor, a temperature sensor and a regulating water nozzle driven by a micromotor, and each underground ultrasonic communication unit is respectively communicated with a ground ultrasonic communication unit by adopting ultrasonic encoding to realize data information transmission between the underground and the ground ultrasonic communication units and automatically finish the regulation on the water injection quantity of each water injection layer. The ultrasonic measured and controlled water distributing device has reasonable structural design, accurate water distribution quantity, no influence from the increase of the water injection layers and widened application range, and realizes that the distributed water flow is directly measured through wireless control by utilizing an ultrasonic communication technology.

Described herein are methods for monitoring or modulating an immune system in a subject; treating, reducing or monitoring inflammation; monitoring blood pressure; treating hypertension; or administering or adjusting a therapy for inflammation or hypertension in a patient by electrically stimulating the splenic nerve or detecting splenic nerve activity using an implanted medical device. Also described herein are implantable medical devices for performing such methods. The implanted medical device includes an ultrasonic transducer configured to receive ultrasonic waves and convert energy from the ultrasonic waves into an electrical energy that powers the device, two or more electrodes in electrical communication with the ultrasonic transducer that are configured to electrically stimulate a splenic nerve or detect a splenic nerve activity, and optionally a splenic nerve attachment member.

The invention discloses a voice remote control method and apparatus. The voice remote control apparatus includes the following steps: receiving a voice command; performing voice identification on thevoice command, and acquiring a control command; performing ultrasonic encoding on the control command to generate an ultrasonic remote control signal; and emitting the ultrasonic remote control signalto the outside. Therefore, the voice remote control apparatus can realize voice remote control through ultrasonic wave, and can free the two hands of a user. Besides, the user does not need performing networking operation or matching operation manually, so that the operation convenience can be improved; ultrasonic communication belongs to point-to-point communication, and is higher in safety; thecoincidence rate between the ultrasonic wave and the other electromagnetic signals is lower, so that the ultrasonic wave is not easy to be influenced by the other electromagnetic signals, and the remote control stability is higher; as the ultrasonic wave is radiated and propagated in the air, the voice remote control apparatus does not need to align with the controlled equipment, so that the operation convenience is improved and multiple controlled devices can be remotely controlled conveniently; and the safety, the stability and the convenience of remote operation can be improved, and the remote control performance can be greatly improved, and the user experience can be improved.

The invention provides an encoding method in secondary ultrasonic communication. The encoding method comprises: an encoding device selects four frequency points in a secondary ultrasonic frequency band as four kinds of symbols for transmission in communication, wherein the four kinds of symbols respectively include one data transmission start code, one data transmission end code, binary data 0 and binary data 1; according to the size of user data, a to-be-encoded user data bit length is determined and a check bit is calculated; the user data bit and the check bit are synthesized into data frames with different lengths by a self-adaptive way according to a data frame encoding format; and the data frames with different lengths are sent to a decoding device and thus the decoding device carries out framing processing according to the data frame encoding format so as to complete the decoding operation. Correspondingly, the invention also provides a decoding method and a system. Therefore, a problem of low communication efficiency due to fixed length encoding in the prior art can be solved; the redundancy and data sending time are reduced; and the communication efficiency is improved.

The invention provides a coding method and apparatus in secondary ultrasonic communication. A plurality of frequency points in a secondary ultrasonic communication frequency band and four kinds of symbols are respectively set, wherein the four kinds of symbols respectively are a data synchronous code E, binary data "0", binary data "1", and a data repetition code "P"; to-be-sent data are determined and if two bits of identical data for continuous sending exit in the to-be-sent data, the data repetition code is used for replacing the second-bit data; the to-be-sent data are coded according to a data coding format and data frames after coding are transmitted, thereby realizing secondary ultrasonic communication. Besides, the data coding format successively includes a data communication start code, a check code, net load data, and a data transmission end mark code; and the data communication start code is formed by synthesis of the data synchronous code E and the data repetition code P. According to the invention, a problem that an error code occurs due to identical data continuous sending caused by inaccurate communication synchronization in the prior art can be solved; and the transmission accuracy rate can be improved.

The invention provides an ultrasonic professional dictionary construction and use method. The method including constructing an ultrasonic professional dictionary and performing sparse decomposition on pulse ultrasonic signals with the constructed ultrasonic professional dictionary. By the ultrasonic professional dictionary, simplest expression of the ultrasonic signals can be obtained fast. Atom selection in the dictionary fully considers geometrical structure similarity of the pulse ultrasonic signals and atoms, and parameter setting, dispersion, search path, matching principles, optimizing principles and judging principles of the dictionary are obtained by pre-training the pulse ultrasonic signals. The dictionary further has a learning function, an atom library can be updated according to actual application conditions. By the method, the defects that current ultrasonic signal sparse decomposition is high in calculation complexity, and poor in time greediness and decomposition stability, and support is provided for application for medical ultrasonic detection and imaging fields, industrial and agricultural ultrasonic non-destructive detection fields and ultrasonic communication fields.

The invention discloses a hexadecimal encoding and decoding method and device of ultrasonic communication. The hexadecimal encoding method of the ultrasonic communication comprises the following steps: S11, converting acquired to-be-transmitted data to a hexadecimal code; S12, performing encoding modulation on the hexadecimal code obtained through conversion according to a preset ultrasonic communication encoding/decoding format, thereby generating an external sent ultrasonic signal data waveform, wherein the ultrasonic communication encoding/decoding format is as follows: 16 encoding sequences are correspondingly set for 16 hexadecimal metadata, each encoding sequence is composed of N ultrasonic signals sent in order, the frequencies of the N ultrasonic signals are mutually different, andthe first ultrasonic signals of the different hexadecimal metadata are same data head signal, and the last N-1 ultrasonic signals of different hexadecimal metadata are N-1 content signal in differentarrangement orders. Through the technical scheme disclosed by the invention, a data transmission need when the data category is too many can be satisfied.

The invention relates to the field of ultrasonic signal transmission, specifically to an ultrasonic-penetrating-metal communication device. A curing agent and epoxy resin are prepared by adopting a proportion of 1 to 4 and mixed evenly to form a coupling agent (4), abrasive paper is used to polish outer walls of two sides on a steel plate (1), thereby ensuring that the outer walls are parallel and smooth, a transmitting transducer (2) and a receiving transducer (3) are aligned and pasted on the two side walls of the steel plate (1) by adopting the coupling agent (4), piezoelectric wafers are guaranteed to be closely bonded to the steel plate walls with no gap being left, the transmitting transducer (2) is connected with a drive signal circuit (5), and the receiving transducer (3) is connected with a signal processing circuit (6). The ultrasonic-penetrating-metal communication device uses a system identification method for parameter determination of an ultrasonic communication channel model, effectively eliminates intersymbol interference, and acquires and transmits internal environmental information in a metal shielding object, thereby realizing errorless and high-speed transmission of information under the circumstance of not damaging integrity of metal walls.

The invention relates to the electrical technical field. An automatic underground power line fault positioning and warning system comprises at least three sensors for detecting the working state of an underground power line, wherein each sensor is a wireless passive sensor and is provided with a communication module, each communication module is provided with at least two different kinds of communication media and comprises an ultrasonic communication module with an ultrasonic signal as the communication medium and a radiocommunication module with a radio signal as the communication medium, each sensor is connected with a main unit server through the corresponding communication module, and feature data for identity recognition are arranged in each sensor. Due to the fact that each communication module is provided with different communication media for joint communication, the system is suitable for communication conditions in different environments and with different distances, signal transmission stability is improved, and normal signal transmission can still be guaranteed when any communication module breaks down. Furthermore, feature data for identity recognition are transmitted outside through the communication modules, so that positioning is facilitated.

A reconfigurable implantable system for ultrasonic power control and telemetry includes a charging device that includes an ultrasonic transducer to transmit and receive ultrasonic signals transmitted through a biological body, and a signal generator to drive the ultrasonic transducer to transmit an ultrasonic charging signal through the biological body. The system further includes an implantable device configured to communicate wirelessly with the charging device through the biological body via an ultrasonic communication link between the implantable device and the charging device. An implantable ultrasonic transducer receives the ultrasonic charging signal from the charging device and transmits ultrasonic signals through the biological body. A power unit coupled to the ultrasonic transducer harvests energy from the received ultrasonic charging signal when the implantable device is in an energy harvesting mode. A communication unit is configured to switch the implantable device between the energy harvesting mode and an ultrasonic communication mode, and to read data from the sensing or actuation unit and transmit the data through the implantable ultrasonic transducer when the implantable device is in the ultrasonic communication mode.

The invention discloses a WiFi (Wireless Fidelity) and ultrasonic communication-based online FPGA (Field Programmable Gate Array) updating system and method. The system comprises a main control moduleand a WiFi module, an ultrasonic module, an FPGA and a Flash chip which are connected with the main control module, wherein the WiFi module and the ultrasonic module are externally connected with anupper computer; the WiFi module is wirelessly connected with the upper computer and is connected with the main control module and the FPGA by adopting an SPI (Serial Peripheral Interface) bus mode; and the FPGA is connected with the FLASH chip by adopting an EMIF (External Memory Interface) protocol. The method comprises the steps of updating when an AUV (Autonomous Underwater Vehicle) is in a floating state and updating when the AUV is in a diving state. The system has the advantages that the system is low in cost, convenient to use and reliable in operation; special cables and downloaders are not needed to be connected; and the reliability of the system is guaranteed by using WiFi and ultrasonic dual-mode communication at the same time. The method has the advantages that the updating cost of AUV programs can be reduced and versions of the programs can be updated in real time to improve the flexibility of AUV systems.

The embodiment of the invention discloses an ultrasonic communication method and an ultrasonic communication device. Ultrasonic communication is realized; a crowded wireless frequency resource is unnecessary to occupy; and simultaneously, the anti-interference capability is high. The method in the embodiment of the invention comprises the following steps that: an ultrasonic transducer receives an electric signal; the ultrasonic transducer converts the electric signal into ultrasonic wave and transmits the ultrasonic wave to an ultrasonic sensor through a density medium; and the ultrasonic sensor detects the ultrasonic wave and converts the ultrasonic wave into the electric signal. The embodiment of the invention further provides an ultrasonic communication device. By means of the embodiment of the invention, ultrasonic communication can be realized; the crowded wireless frequency resource is unnecessary to occupy; and simultaneously, the anti-interference capability is high.