33 results about "Wireless telegraphy" patented technology

A method and an apparatus are provided for scrambling sequence initialization for downlink demodulation reference signal (DL DMRS) applied to the multi-user (MU) multi-input multi-output (MU-MIMO) in a coordinated multiple point (CoMP) scenario. The value of virtual slot index in the sequence initialization of the DL DMRS can be dynamically selected from two candidates and tied to the virtual cell ID and / or the physical downlink shared channel (PDSCH) scrambling ID. The two candidate values can be configured by a user equipment (UE) specific semi-statistical higher layer signaling if a subframe shifting is considered for enhanced inter-cell interference cancellation (eICIC) in HeNets. Possible values of virtual slot index used for generating the DL DMRS sequence initialization of the cell can then be derived so that access procedure information, which may include synchronization signal, physical broadcast channel, paging message, can be reliably received at the remote radio header (RRH) or pico cell.

In the wireless telegram communication (28) from data-generating, unidirectionally communicating terminal devices (12) by way of primary radio sections (10) and by way of subsequent bidirectionally operating data collectors (13) of a radio network (11) to a data-documenting master data collector (14), a memory and selection expenditure governed by redundancy as a consequence of multiple connections by way of the primary radio sections (10) is avoided and nonetheless very reliable telegram communication (18) is achieved with simplified data collectors (13) if distribution criteria such as for example reception field strength-dependent quality information (22) is currently detected and stored in data collectors (13) for primary radio sections (10) from terminal devices (12). In dependence on the instantaneous distribution criteria for each terminal device (12) the master data collector (14) implements a quasi-stationary association with one and only one of the data collectors (13) for the subsequent telegram communications (18), until for example periodically or in an event-controlled manner a new association of a terminal device (12) is again implemented with one and only one, possibly a different one of the data collectors (13). The data collectors (13) also operate with each other as relay stations (25) for forwarding the data telegrams (18) to the master data collector (14) and are equipped, to prevent telegram doublets occurring on different routes, with a barrier against the same data telegram (18) being read out a plurality of times.

A monitoring system for detecting the breathing and wetness status of an infant or the like comprises a breathing sensor for monitoring breathing rhythms of the infant; a urinary wetness sensor for detecting urination of the infant; and a processing device. The processing device contains a radio transmission module for sending a radio alarm signal to at least one remote receiver, and a circuit board for receiving and analyzing sensed data from the breathing sensor and the urinary wetness sensor. When sensed data reaches an associated threshold, the circuit board will activate an audible-visual alarm circuit to produce an alarm at the site of the infant and drive the radio transmission module to send out a radio alarm signal to remote receivers.

An industrial field real-time working condition radio alarm system, comprises a transmitting end (11) and a receiving end (12) carried a worker; the transmitting end (11) comprises a detector (101) to detect the current working condition, a transmitting end processor (102) to process an on-off signal sent by the detector (101), and a radio transmitter (103) to transmit an alarm signal to the receiving end (12) under the control of the transmitting end processor (102); the receiving end (12) comprises a radio receiver (105) to receive the alarm signal, a receiving end processor (106) to process the alarm signal sent by the radio receiver (105), and an alarm (107) to send an alarm under the control of the receiving end processor (106); the transmitting end processor (102) is connected to the detector (101) and the radio transmitter (103) respectively; and the receiving end processor (106) is connected to the radio receiver (105) and the alarm (107) respectively. The radio alarm system can send a dangerous working condition alarm to all workers in real time.

A tire pressure detector and alarm system is disclosed to include a battery-operated tire pressure detector installed in the air valve of a vehicle wheel and controlled by a control switch formed of a metal probe and a diaphragm held metal conductor member for providing a radio alarm signal when tire pressure low, a locking device installed in the air valve of the vehicle wheel to lock the tire pressure detector to the air valve, and a receiver and alarm unit directly connectable to the socket for cigarette lighter for receiving radio alarm signal from the tire pressure detector and display the signal.

An industrial field real-time working condition radio alarm system, comprises a transmitting end (11) and a receiving end (12) carried a worker; the transmitting end (11) comprises a detector (101) to detect the current working condition, a transmitting end processor (102) to process an on-off signal sent by the detector (101), and a radio transmitter (103) to transmit an alarm signal to the receiving end (12) under the control of the transmitting end processor (102); the receiving end (12) comprises a radio receiver (105) to receive the alarm signal, a receiving end processor (106) to process the alarm signal sent by the radio receiver (105), and an alarm (107) to send an alarm under the control of the receiving end processor (106); the transmitting end processor (102) is connected to the detector (101) and the radio transmitter (103) respectively; and the receiving end processor (106) is connected to the radio receiver (105) and the alarm (107) respectively. The radio alarm system can send a dangerous working condition alarm to all workers in real time.

An anti-theft system for a vehicle includes an on-vehicle machine (10) including reporting means (28) configured to report by radio an illegal activity affecting the vehicle to a designated opponent to be reported to in a case where the illegal activity is detected; and an external facility (30), the external facility (30) including obstruction radio wave detection means (36) configured to detect a radio wave obstructing the radio-report by the reporting means; and illegal activity prevention means (38, 40, 42) configured to prevent the illegal activity in a case where the radio wave is detected by the obstruction radio wave detection means (36). Jamming the radio signal from the vehicle is detected and triggers taking a photograph of the vehicle and its surroundings.

A method and an apparatus are provided for scrambling sequence initialization for downlink demodulation reference signal (DL DMRS) applied to the multi-user (MU) multi-input multi-output (MU-MIMO) in a coordinated multiple point (CoMP) scenario. The value of virtual slot index in the sequence initialization of the DL DMRS can be dynamically selected from two candidates and tied to the virtual cell ID and / or the physical downlink shared channel (PDSCH) scrambling ID. The two candidate values can be configured by a user equipment (UE) specific semi-statistical higher layer signaling if a subframe shifting is considered for enhanced inter-cell interference cancellation (eICIC) in HeNets. Possible values of virtual slot index used for generating the DL DMRS sequence initialization of the cell can then be derived so that access procedure information, which may include synchronization signal, physical broadcast channel, paging message, can be reliably received at the remote radio header (RRH) or pico cell.

The invention belongs to the field of signal detection and processing in textile industry and relates to a broken yarn detection method for looms. The broken yarn detection method for looms overcomes the defects in the existing broken yarn detection, and uses area means instead of point means, so that broken yarn detection is more accurate and reliable. A system of broken yarn detection comprises a high-speed camera, a high-speed A / D (analog / digital) converter, FPGAs (field programmable logic devices), an active RFID (radio frequency identification device), a handheld terminal and the like. Pictures of gauze are captured by the high-speed camera, the high-speed A / D converter is used for sampling and analog-digital conversion for image analog signals, image data are rapidly analyzed and processed by FPGA technology, signals are output to stop a loom according to processing results, and wireless alarm signals are transmitted to the handheld terminal through the active RFID.

The invention relates to an infrared vehicle anti-theft alarm device, which is formed by infrared signal sending receiving device, burglar alarm system control box, sound alarm, and tear gas, wherein the infrared signal sending receiving device is connected to the burglar alarm system control box, sound alarm and tear gas; when using, turning on the switch of burglar alarm system control box after parking the vehicle, the infrared ranging device will work in seconds and transmit measured data to the alarm circuit of burglar alarm system control box; at that time, if the door is opened, the ranging signal will change to turn on the alarm circuit and close the start circuit of engine, to send wireless alarm to the mobile phone of user and release tear gas. The invention has simple structure and easy application.

A radio-type full-automatic leakage alarm for tyre of motor-driven vehicle is composed of a miniature radio transmitter fixed to air valve of tyre, a switch controlled by the air pressure in tyre and a radio receiver installed in the driver cab. When the air pressure in tyre is reduced to a threshold due to leakage, the switch is triggered to turn on the radio transmitter for transmitting leakage signal. The signal is received by the said receiver to generate an audio alarm which indicating corresponding numerals.

A mobile communication device comprises an internal antenna device for receiving low-band signals of operating frequency band below 1 GHz, and the internal antenna device can be connected in series or parallel with an external antenna such as an earphone. The mobile communication device of the invention uses the internal antenna device for receiving low-band signals, enabling radio alarm function and timed recording of radio programs without plugging in an external earphone.

The invention relates to a radio pre-warning device for preventing rear-end collision of trains, which comprises a micro processor (4), an accumulated battery (3), a radio station (5), a pressure sensor (10), an input button (9), etc., which are installed at the tail part of a running train; a high-pressure soft tube (1) is communicated with a main brake pipe of the train. When the train runs, the micro processor (4) monitors the information of changed pressure of the brake pipe of the train by inquiring the pressure sensor (10); when the train is judged to have to emergently stop, the micro processor controls the radio station (5) to continuously transmit the radio alarm signal of, ''No. ''XX'' train is forced to stop and the ''X'' bound train, please do not get close!'', and a strong light protective lamp (6) flashes to conduct assisting protection, so as to remind the drivers of the following trains to take safety measures to prevent the rear-end collision.

The invention discloses a water area positioning and alarming device which comprises a positioning anchor, an anchor chain and a buoy. The positioning anchor is connected with the buoy through the anchor chain, a floating bag, a sealed cabin and a chain anchor cabin are arranged on the buoy, an antenna and a light-emitting material are arranged on the floating bag of the buoy, and a power storing device, a wireless electric alarming device and a related device are arranged in the sealed cabin. The water area positioning and alarming device can be arranged on an aircraft and a boat and can be automatically ejected out under powerful vibration and can also be ejected out under a controlled condition, and meanwhile the wireless electric alarming device is started. After the aircraft or the boat falls into water, the positioning anchor drags the buoy to be located in a certain water area, and the wireless electric alarming device can continuously send SOS which is recorded in advance. Thus, a rescuing department can correctly determine the direction in time to conduct effective rescuing.

The invention discloses a positioning method, computer equipment and a readable storage medium, and belongs to the field of communication. The method comprises steps of determining a system positioning mode; dividing a time axis for sending a positioning radio message, wherein time periods for sending the first radio message and / or the second radio message and positioning data sending time periodsare periodically arranged on the time axis at intervals; sending a first radio message and / or a second radio message to the label based on the divided time axis, so that the label calculates first original positioning data through the arrival time difference of the first radio message and / or calculates second original positioning data through the return time difference of the second radio message; receiving positioning data and sending the positioning data to a background, and resolving a positioning result. According to the invention, two different positioning radio messages are used, a distributed positioning mode and a centralized positioning mode are integrated, and the problems that the positioning modes are difficult to switch and the precision of a single positioning mode is insufficient are solved.

The invention provides a network switching method and device and electronic equipment, and belongs to the technical field of communication, and the network switching method provided by the invention comprises the steps: transmitting a UWB (Ultra Wide Band) radio message to a target router; acquiring first feedback information of the target router to the UWB radio telegrams, and determining the distance between the electronic equipment and the target router according to the first feedback information; according to the Wifi frequency band and the coverage range of the target router and the distance between the electronic equipment and the target router, switching the working frequency band of the electronic equipment to the Wifi frequency band corresponding to the coverage range where the electronic equipment is located. Through the method, the UWB ranging function can be added to the electronic equipment (such as a mobile terminal) and the router to construct a local positioning network of a network system, automatic route selection and network switching are realized, and the network is stable during cross-system connection.

The invention relates to a method for improving the transmission quality between a data collector (3) and a plurality of measuring units, in particular consumption measuring devices (2), in a communication system (1) with preferably bidirectional radio transmission with a first communication module (10), wherein the first communication module (10) is associated with the data collector (3), and twoor more second communication modules (17), wherein each second communication module (17) is associated with one measuring unit, wherein the second communication module (17) is provided for sending data to the first communication module (10) by means of radio signals, preferably in the form of at least one radio telegram (4) preferably comprising a plurality of data packet(s), wherein the first communication module (10) is provided for receiving the data from the second communication module (17), wherein the first communication module (10) comprises a first frequency reference device (11), wherein the second communication module (17) comprises a second frequency reference device (18), wherein the radio signals transferred from the second communication module (17) to the first communicationmodule (10) in the data transmission are dependent on the second frequency reference device (18), wherein at least one parameter of the radio signal sent out by the second communication module (17) and received by the first communication module (10), from the parameter group comprising bandwidth, data rate, data rate offset, temperature from the data packet, delta frequency, modulation index, and / or reception time by the first communication module (10), is measured, an error of the second frequency reference device (18) is estimated on the basis of the parameter measurement values or values derived therefrom, and the frequency of the first frequency reference device (11) and / or at least one parameter in the first communication module (10) from the group comprising data rate, data rate offset, modulation index and frequency shift is adjusted in such a way that the error of the second frequency reference device (18) or the parameter error dependent thereon is reduced or eliminated.

The invention provides a low-battery follow device of an electric vehicle. The low-battery follow device comprises a voltage signal monitoring module, a judging module, a warning module and a follow control module. All the modules of the device are arranged in the electric vehicle. The voltage signal monitoring module of the low-battery follow device of the electric vehicle can monitor the voltage of a vehicle battery in real time, and the device makes a sound or sends out a radio alarm signal when the voltage is below level to prompt the driver to selectively enter a power limitation mode and drive the vehicle with small power for increasing range or selectively enter a follow mode that the vehicle runs forwards following the drive at proper speed or runs forwards accompanied with the driver at proper speed under the condition that the driver keeps balance by holding the vehicle with hands. The low-battery follow device of the electric device can prompt the driver to change the driving mode in time when the electric vehicle is on a low battery state, so as to avoid or delay carrying or pushing the vehicle manually when the battery runs out.

The invention discloses a tire burst monitoring sensor, wherein tiny exhaust damping holes are arranged on an elastic conducting plate; when a tire has normal and slow air permeation, although the air pressure of a monitoring cavity arranged above the elastic conducting plate is reduced, the air in a reference cavity can be discharged into the monitoring cavity through the exhaust damping holes on the elastic conducting plate, so that the air pressure in the reference cavity is guaranteed to be consistent with that in the monitoring cavity in time, a negative pole of a battery is not conducted by the upward bulge of the elastic conducting plate, and the long-time slow air permeation of the tire is avoided being identified as tire burst rapid air permeation by the tire burst monitoring sensor; during the tire burst rapid air permeation, the air pressure in the reference cavity can not be discharged outside in time, the air pressure difference between the reference cavity and the monitoring cavity rapidly rises, the elastic conducting plate is driven to protrude upwards, the negative pole of the battery is connected, a radio alarm signal and a flashing light alarm are transmitted by a transmission module, and a tire burst prevention device is started after a mainframe in an automobile receives the radio alarm signal, so that the automobile is guaranteed not to turn on the side.

The invention relates to a radio control system for machine control, comprising: - a machine-side radio receiver (7), which is assigned its own identification mark, - assigned to the radio receiver (7), However, a mobile data carrier (9) which can be transported separately from this radio receiver and which contains information about the identification of the radio receiver (7) as stored data - is used to generate a radio telegram and transmit it to The radio transmitter (1) of the radio receiver (7), wherein the radio transmitter (1) is also assigned its own identification mark, wherein the radio transmitter (1) has an interface for transmitting data, the mobile data carrier (9) A data transmission connection can be entered into with this interface, and information about the identification mark of the radio receiver (7) can be transmitted from the mobile data carrier (9) into the radio transmitter (1) via this interface, wherein the radio The transmitter (1) is additionally configured to generate and store identification data from this information about the identification mark of the radio receiver (7), wherein the radio transmitter (1) is additionally configured to include the identification data in its radiotelegram , wherein the radio receiver (7) can be initialized in such a way that it accepts radio telegrams for machine control, if these radio telegrams contain relevant identification data within the radio telegrams.

In a radio alarm signaling system with a central station (Z) and a plurality of bidirectional (BT1 to BT5) and unidirectional (UT1, UT2) subscribers, the unidirectional subscribers (UT1, UT2) attempt to send messages via one of the bidirectional subscribers (BT1 to BT5) to the central station. In this case the message sent by a unidirectional subscriber (UT2) is received by all bidirectional subscribers (BT1, BT2, BT5) in its radio coverage area. Each bidirectional subscriber that has received this message waits until a time slot individually assigned to it before forwarding the message. During the wait time each of these bidirectional subscribers (BT1, BT2, BT5) monitors the radio channel to see whether another subscriber has already forwarded the message. If this is the case it suppresses its own forwarding. This ensures that only one of the bidirectional subscribers (BT1) forwards the message so that no overloading of the radio system occurs.

The invention relates to a method for radio transmission of data, in particular sensor data, between at least one, preferably permanently stationary, battery-operated node (2) and a base station (3) in a communication system (1) operating with bidirectional radio transmission, the base station (3) having a communication module (10) with a first frequency generator (11), the node (2) has a communication module (17) with a first frequency generator (18) and a second frequency generator (21), which has a lower frequency than the frequency of the first frequency generator (18), the communication module (17) of the node (2) being configured to transmit data in the uplink to the communication module (10) of the base station (3), the radio telegrams (40) are divided into at least two data packets, preferably into a plurality of data packets (40-1, 40-n), the individual data packets (40-1, 40-n) are transmitted one after the other at time intervals, and wherein the communication module (10) of the base station (3) is designed to transmit data in the downlink to the communication module (17) of the node (2), and wherein the communication module (17) of the base station (3) is designed to transmit data in the downlink to the communication module (17) of the node (2). The radio telegrams (50) are divided into at least two data packets, preferably into a plurality of data packets (50-1, 50-n), and the individual data packets (50-1, 50-n) are transmitted one after the other at time intervals. In order to solve the problem of improving the reception quality in the downlink, according to the invention, during a transmission time period consisting of a sequence of data packets (40-1, 40-n) and a subsequent sequence of data packets (50-1, 50-n) together with the sum of the time periods that may be located therebetween, the sequence of data packets (40-1, 40-n) and the subsequent sequence of data packets (50-1, 50-n) are transmitted to the downlink. At least two calibrations (KAL1) of the first frequency generator (18) and the second frequency generator (21) of the node (2) are made.

A method for transmitting data or sensor data by radio between a preferably fixed battery-operated node and base station in a communication system with bidirectional radio transmission, includes providing a base station communication module having a first frequency transmitter, and a node communication module having a first frequency transmitter and second frequency transmitter with lower frequency. The node communication module transmits data in the uplink to the base station communication module by splitting a radio telegram into data packets transmitted successively with temporal spacing. The base station communication module transmits data in the downlink to the node communication module by splitting a radio telegram into data packets transmitted successively with temporal spacing. To improve downlink reception quality, two calibrations of first and second node frequency transmitters occur during transmission of the sum of a sequence of uplink data packets and subsequent sequence of downlink data packets including periods therebetween.

The invention provides a distributed optical fiber gas detection device based on photoacoustic spectrometry. The distributed optical fiber gas detection device comprises a laser module, a gas detection module, a signal receiving unit and a computing terminal. The lasers output by the laser module enter a single mode optical fiber which is cascade connected with the gas detection module, the gas detection module utilizes wireless telegraphy to transmit the detected signal to the signal receiving unit, and the signal receiving unit sends the received detected signal to the computing terminal. The laser module is composed of a tunable laser, a laser controller and a signal modulator. The gas detection module is composed of a gas sensing unit, a signal amplifier, a signal demodulator and a radio signal transmitting module. The distributed optical fiber gas detection device based on the photoacoustic spectrometry outputs the internal light field in a coupling mode through a micro-nano device with the defected high Q value, and the device is simplified, easy to integrate, small in size and high in sensitivity.

The invention relates to a motorcycle anti-theft alarm. Traditional motorcycle anti-theft alarm can not better protect vehicles, and the higher-level wireless alarm and satellite alarm do not have ideal effects and the price is so high that the public cannot afford. The motorcycle anti-theft alarm adopts the short circuit phenomenon, the series circuit principle, electromagnet principle, spring deformation principle, lever principle, electromagnetic relay principle, driving principle, and the short circuit prevention method of the circuit, and when a motorcycle is really stolen, an anti-theft device starts, an anti-theft signal is sent, and meanwhile, a warded lock starts to lock a wheel.

The invention discloses an earthquake alarm device capable of effectively generating high-decibel audible alarm and radio-wave alarm when an earthquake disaster happens. Elements such as a mercury switch or a heavy hammer switch, a sensitivity switch, an emergency knob switch, an audible alarm elimination switch, an interlocking contactor, an interlocking contactor normally-open contact, a normally-closed button, an audible alarm, a radio-wave alarm, a charge battery and a hand generator are electrically connected through lead wires and then are combined with elements such as an alarm housing, an alarm base, a resonance supporting spring and a radio-wave emission antenna in sequence respectively to form a mercury switch earthquake alarm device or a heavy hammer switch earthquake alarm device.

The invention relates to a radio control system for controlling machines, comprising a radio receiver (7) on the machine side to which a dedicated identification marking is assigned; a mobile data carrier (9) that is dedicated to the radio receiver (7) but can be transported separately, which as stored data contains the information about the identification marking of the radio receiver (7); a radio transmitter (1) for generating and transmitting radio telegrams to the radio receiver (7), wherein the radio transmitter (1) is also assigned a dedicated identification marking. The radio transmitter (1) has an interface for transmitting data, by means of which the mobile data carrier (9) can be brought into data transmission connection, and by way of which information can be transmitted, and by way of which information about the identification marking of the radio receiver (7) can be transferred by the mobile data carrier (9) into the radio transmitter (1). Subject to said information regarding the identification marking of the radio receiver (7), the radio transmitter (1) is further configured to generate and store identification data, and the radio transmitter (1) is further configured to incorporate the identification data into the radio telegrams of the radio transmitter (1), wherein the radio receiver (7) can be initialized such that the radio receiver (7) accepts radio telegrams for the machine control if relevant identification data is contained in the radio telegrams.

A method transmits data via radio between a node and a base station with bidirectional radio transmission-based operation. The base station has a communication module with a first frequency transmitter. The node has a communication module with a first frequency transmitter and a second frequency transmitter with a frequency lower than the first frequency transmitter. The communication module of the node is intended to transmit data in the uplink to the communication module of the base station by virtue of a radio telegram being split into two data packets transmitted successively with a temporal spacing. The communication module of the base station transmits data in the downlink to the communication module of the node by virtue of a radio telegram being split into two data packets transmitted successively with a temporal spacing. The transmission time and / or the carrier frequency of at least one of the data packets is corrected.

The invention is a wireless short-distance rechargeable desk lamp for students, which relates to the technical fields of electronics and radio. This invention aims to provide a movable and rechargeable student desk lamp. To achieve this purpose, this invention includes the main component of the student desk lamp and a wireless power supply component, wherein: the wireless power supply component includes AC mains and wireless AC mains transmitting unit Connect the wireless AC mains transmitting unit; the main component of the student table lamp includes the wireless AC mains receiving unit and necessary components, including: a soft LED light tube or light bulb, a frosted semi-transparent lampshade, a light-touch switch. It also includes a USB charging socket, which can be used to charge the flashlight. This invention has the advantage of safer electricity.