95results about How to "Guaranteed signal strength" patented technology

The invention discloses an optical fiber fabry-perot acoustic-vibration sensing device and a demodulation method based on double tunable light sources, the device comprises a first narrow-linewidth laser, a second narrow-linewidth laser, a first wavelength division multiplexer, an optical fiber coupler, an optical fiber fabry-perot acoustic-vibration sensor, a second wavelength division multiplexer, a first photoelectric detector, a second photoelectric detector and a data acquisition card; wherein two lasers with different wave lengths are coupled by the first wavelength division multiplexer into the same optical fiber and are transmitted to the optical fiber fabry-perot acoustic-vibration sensor through the optical fiber coupler; a modulated signal light reflects to the coupler and is transmitted to the second wavelength division multiplexer, the two lasers with different wave lengths in one optical fiber are divided and separately transmitted into two optical fibers, and the two lasers are separately transmitted into the first photoelectric detector and the second photoelectric detector; the two lasers are converted into electrical signals and are acquired, phase information is extracted from the electrical signals, and an acoustic-vibration signal is demodulated to obtain a measuring result. According to the invention, the signal strength can be effectively ensured, the sensing demodulation of the initial cavity length and cavity length variation of the optical fiber fabry-perot cavity in wide range can be performed.

The invention discloses an electronic apparatus. The electronic apparatus comprises a first body, a connecting part and a second body which is rotatably connected with the first body through the connecting part. The electronic apparatus further comprises an antenna; a cavity is arranged in the connecting part; and the antenna is accommodated in the cavity. With the electronic apparatus provided by the invention adopted, the technical problem of serious interference of an inner metal component on an antenna which is caused by a situation that a distance between the inner metal component and the antenna in an electronic apparatus in the prior art is small can be solved, and the signal intensity of the antenna of the electronic apparatus of the invention can be enhanced.

The present disclosure relates to an antenna adjusting method and device. The method may comprise the following steps: determining a working frequency band of an antenna of a mobile terminal; determining a connection state between the mobile terminal and an external device; determining, based on the determined working frequency band of the antenna and the determined connection state, a target matching state of an antenna tuner in a pre-configured matching state corresponding relationship, wherein the matching state corresponding relationship comprises the corresponding relationship among eachworking frequency band of the antenna, each connection state between the mobile terminal and the external device, and each matching state of the antenna tuner; and adjusting the resonant frequency ofthe antenna based on the determined target matching state of the antenna tuner. According to the method and the device provided by the present disclosure, the target matching state of the antenna tuner is determined in the pre-configured matching state corresponding relationship based on the working frequency band of the mobile terminal and the connection state between the mobile terminal and theexternal device, and the mobile phone antenna can be adjusted to the optimized resonant frequency via the antenna tuner.

The present invention relates to the technical field of mobile communications, and in particular to a signal strength measurement method and device, which can ensure that a Remote UE measures the signal strength of a link between the Remote UE and a ProSe UE-to-NW Relay. In the embodiments of the present invention, after establishing a connection with a remote device, a relay device can also send a second message, and thus the remote device can measure the signal strength of a link between the remote device and the relay device after receiving the second message, that is, after the connection is established between the remote device and the relay device, the relay device can also continue to send the second message, so that the remote device can continue to measure the signal strength between the remote device and the relay device, so as to serve as a basis for determining whether to re-select the relay device, thereby ensuring that the remote device can obtain a good quality of service, improving the utilization rate of a link with a higher quality, and also improving the system reliability.

The invention relates to the field of communication and discloses an automatic inductance-capacitance calibrating method and circuit. The automatic inductance-capacitance calibrating method comprises the following steps: detecting the signal intensity of corresponding direct current offset when a capacitor array in the inductance and capacitance has different values till the signal intensity of the found direct current offset is maximum, and calibrating the capacitor array in the LC (Inductance-Capacitance) according to the value of the capacitor array corresponding maximum. The LC deviation is achieved by adjusting the value of the capacitor array, so that the working performance and the yield of chips can be improved efficiently, the requirement for mass production can be met, LC technical compensating calibration can be automatically and quickly realized at high precision; and an off-chip SAW (Surface Acoustic Wave) filter is not required, so that the cost is efficiently controlled.

The invention relates to a lightweight access point (AP) redundancy access control method of an active standby mode. The method is applied to a wireless network inside an enterprise. The wireless network comprises an AC and two lightweight APs which are connected with the AC, one AP in the method is used as a main AP, a radio frequency signal is transmitted, the other AP is used as an auxiliary AP and in electricity-saving dormant state, the radio-frequency signal is not transmitted, and the auxiliary AP cyclically detects working condition information of the main AP. If the working state of the main AP working is normal, the auxiliary AP continues to be in an electricity-saving dormant state; if the working state of the main AP is not normal, the auxiliary AP is activated and replaces the main AP to transmit the radio-frequency signal until the working state of the main AP is detected to be recovered to be normal. Compared with the prior art, the lightweight AP redundancy access control method of the active standby mode can keep same received signal strength indication, radio-frequency coverage and data rate at any time. When the main AP and the auxiliary AP are switched, network access continuity of quality of service (QoS), signal strength and the like can be ensured.

The invention discloses a new special wireless router for a university dormitory building; the new special wireless router comprises a main unit box; the upper end of the main unit box is connected with a wireless antenna device; a signal sensing probe is fixed at the upper section of the wireless antenna device; a telescopic spring device is arranged at the bottom of the signal sensing probe; a wireless antenna device groove is reserved on the shell of the main unit box; multiple data wired output ports are arranged at the lateral side of the main unit box; a wired signal input port is arranged beside the output ports; a standby external power supply interface is reserved beside the input port; and the equipment is provided with an external power supply emergency adapter; indicator lights are arranged on the upper side of the main unit box and comprise a power supply indicator light and port working status indicator lights; a built-in power supply plug is arranged at the bottom end of the main unit box and is arranged in a rotational moving manner; and an exhaust air grating is arranged at the lower end of the external power supply plug. The invention provides a router which is convenient in operation, intact in appearance and good in practical effect.

The invention relates to the technical field of Internet of Things communication, and discloses a network roaming method and device, a router, electronic equipment and a readable storage medium, and the method comprises the steps that routing equipment obtains first signal intensity between local equipment and target equipment; whether the first signal intensity meets a first preset condition or not is judged; and when the signal intensity meets a first preset condition, roaming information is sent to the target equipment, and the roaming information carries information of the to-be-roamed node; the target equipment receives a roaming message sent by the current node; the target equipment scans each to-be-roamed node to determine second signal intensity between the local and each to-be-roamed node; and the target equipment determines a target roaming node based on the first signal intensity and the second signal intensity between the local and each to-be-roamed node. Through the implementation of the invention, the target equipment can obtain the network node with better signals in real time in the moving process, so that the stability of the network link between the target equipment and the routing equipment is ensured.

The invention discloses a fingerprint imaging method and a fingerprint imaging system, and the method comprises the steps: starting backlight, and collecting an optical signal at first collection time, so as to obtain a first image; turning off the backlight, and acquiring the optical signal at a second acquisition time to obtain a second image; and obtaining a fingerprint image based on the firstimage and the second image. In the technical scheme of the invention, the definition of the first image is relatively high in the absence of a strong light environment; the definition of the second image is relatively high in a strong light environment; the fingerprint image obtained according to the first image and the second image can obtain better definition in various light intensity environments, particularly, the quality of the fingerprint image obtained in a strong light environment can be ensured, and a good foundation can be provided for subsequent identity recognition according to the fingerprint image.

The invention discloses a three-component motor vehicle exhaust remote detection device. The device comprises an infrared light source, an air chamber, a quarternary infrared detector, an air chamber length adjustment signal module, a signal conditioning module, an A/D conversion module, a light source driving module, a signal processing module and a first wireless data transmission module; the infrared light source emits infrared light, and the infrared light enters the quarternary infrared detector through the air chamber; the quarternary infrared detector is connected with the signal processing module through the signal conditioning module and the A/D conversion module in sequence; the air chamber length adjustment signal module is arranged in the air chamber; the air chamber length adjustment signal module is connected with the signal processing module through the A/D conversion module; the signal processing module is connected with the infrared light source through the light source driving module; the signal processing module is connected with the first wireless data transmission module. By means of the three-component motor vehicle exhaust remote detection device, remote detection can be conducted on motor vehicle exhaust.

The invention provides a method and a system for realizing terminal positioning by using an air base station, and relates to the field of positioning technologies and air base stations. A positioning technology based on a satellite system has the problem of weak positioning signals and needs a special positioning chip, while a positioning technology based on a ground base station system has relatively large limitation in the actual application as signals of a base station and a terminal are generally refracted and reflected in an actual environment and the parameter measurement precision is difficult to guarantee. Along with a possibly generated air base station communication network architecture, the air base station is used as a positioning signal reference source as a new positioning system mode, and the possibility is provided for improving the positioning precision of the terminal in a low-cost mode. Since the positioning signal diameter channel probability between the terminal and the air base station is improved, the parameter measurement accuracy of the positioning signal is improved, and meanwhile, the air base station exchanges measurement parameters through position adjustment and communication with the terminal, so that the improvement of the positioning precision is facilitated.

The embodiment of the invention provides an intelligent control system for LED lamps. The control system comprises a user controller, a wireless gateway, at least one intelligent controller and the LED lamps, wherein the user controller is used for receiving instructions of a user and converting the instructions of the user into electrical signals which are sent to the intelligent controllers through the wireless gateway, the wireless gateway is used for sending the electrical signals sent by the user controller to the intelligent controllers, the intelligent controllers are used for receiving the electrical signals sent by the user controller and generating control signals according to the electrical signals, and the LED lamps are used for emitting light according to the control signals generated by the intelligent controller. According to the intelligent control system, the electrical signals generated by the user controller can be transmitted to the intelligent controllers through the wireless gateway, the intelligent controllers generate the control signals according to the received electrical signals so that the LED lamps in an LED illumination system can be controlled to emit proper light through the intelligent controllers.

The invention discloses a bridge construction monitoring system based on blockchain. The system comprises a signal sampling module and a frequency stabilization adjusting module. The signal sampling module uses a signal sampler J1 with a model of DAM-3056AH to sample blockchain node signals in a bridge construction monitoring system. The frequency stabilization adjusting module uses an inductor L1, a capacitor C2 and a capacitor C1 to form a frequency detection circuit to stabilize signal frequency. Meanwhile, a variable resistor RW1, a triode Q1 and a triode Q2 are used for forming an anomalydetection circuit to eliminate peak signals; an operational amplifier AR2 is used for further adjusting the signal waveform of the signal; then, a triode Q3 feedback operational amplifier AR2 is usedfor outputting a high-level signal to an emitting electrode of a triode Q1; finally, a triode Q4, an inductor L4, a capacitor C6 and a capacitor C7 are used for forming a frequency modulation circuitto adjust the signal frequency, sampling adjustment can be conducted on blockchain node signals in the bridge construction monitoring system, and the blockchain node signals are converted into reference analysis signals of a bridge construction monitoring system terminal based on blockchain.

The disclosed control device for main power of display comprises: an access control module (103), a signal processing module (301), and an electrifying control module (102) to detect signal from (301) and verify the VGA interface (302) to drive the module (103) electrifying the power. This invention improves display intelligent degree.

The invention discloses a driving current adjusting method and device, a storage medium and a mobile terminal. The method comprises the steps of acquiring a first driving current, wherein the first driving current is a current currently used for driving a preset first device; acquiring a working state of a preset second device of a second mobile terminal; determining a second driving current according to the working state; if the difference value between the first driving current and the second driving current is greater than a preset first threshold value, adjusting the first driving currentaccording to a preset amplitude to obtain an adjusted driving current; and driving the preset first device according to the adjusted driving current. According to the invention, when the signal intensity of the Bluetooth becomes poor instantly, the power failure of the mobile terminal can be avoided.

In a radiocommunication system including at least one base station and a mobile station connected across a first radio channel to the base station, the signal strengths of the first radio channel and neighboring radio channels are measured in the mobile station to determine whether reselection to a neighboring radio channel is necessary. Each radio channel is measured at various points in a frame period or in different frame periods, the measurements occurring in different time slots. The points at which the signal strength measurements of each radio channel are made may be rotated among the different frame periods, the measurements may be made at random points in the different frame periods, or the starting times of the measurements may be rotated among or occur randomly in the different frame periods. Alternately, the signal strengths of each radio channel may be measured at different points in a single frame period. The measurements of the signal strength of the each radio channel are averaged, and the averaged measurements are compared to determine whether reselection from the first radio channel to a neighboring radio channel is necessary.

The invention discloses a two-way voice transmission system comprising a node A and a node B, wherein each of the node A and the node B comprises a voice collection module, a voice output module and a core processing module, the voice collection module comprises a microphone and an AD converter, the voice output module comprises a loudspeaker and a DA converter, and the core processing module comprises a wireless transmitting circuit and a wireless receiving circuit. During voice transmission, the microphone of the node A receives a voice signal and transmits the signal to the core processing module after processing the signal through the AD converter, and the wireless transmitting circuit of the core processing module of the node A transmits the signal after AD conversion to the node B; the wireless receiving circuit of the core processing module of the node B receives a wireless signal and outputs the wireless signal to the voice output module of the node B, and the wireless signal is transmitted by the DA converter to the loudspeaker to output voice; and the node B sends the voice to the node A in the same principle so as to accomplish two-way voice transmission. The two-way voice transmission system disclosed by the invention requires no license, and has the advantages of low cost, good safety and good data fluency.

The invention relates to a low-loss adjustable band-pass filter based on characteristics of the left-handed, and belongs to the field of a microwave component. The low-loss adjustable band-pass filter has a sandwich structure of ferrite/dielectric/ferrite; the thickness ratio of the three layers is 1 to (0.01 to 3) to 1; the resonant coupling of the two ferrite layers can realize the microwave transmission band with the left-handed characteristics; an external magnetic field can be used for the real-time regulation and control of the working frequency range of the microwave transmission band;and the structural parameters can be changed to effectively adjust the width and the insertion loss of the transmission band. The adjustable band-pass filter has the advantage of ultra-low loss whichcan be as low as below 1 dB; the real-time regulation of the working frequency range of the microwave transmission band can be realized; and the width and the insertion loss of the transmission band depend on the structural parameters. The adjustable band-pass filter has the advantages of simple structure, convenient application, easy production and convenient maintenance.

The invention discloses strong signal miniature radar comprising a support and a signal unit connected with the same. The signal unit is provided with a plurality of signal stiffeners; each signal stiffener is internally provided with a power device; the support is provided with an angle regulator near the top end.

The invention discloses an Oligo probe and a preparation method and application thereof. The preparation method comprises: mixing a first partial sequence and a second partial sequence, carrying out denaturation and annealing in a labeled deoxyribonucleotide system, and adding a DNA polymerase into the system for a polymerization reaction to obtain the Oligo probe. The first partial sequence is acommon sequence 1 connected to the end 3' of a specific oligonucleotide sequence and the second partial sequence is a common sequence 2 connected to the end 3' of a labeled sequence. The specific oligonucleotide sequence is specifically bonded to a gene to be detected and does not contain the repeated sequence. The common sequence 2 is a sequence with a modified end 3' and the common sequence 1 iscomplementary with the common sequence 2. The Oligo probe has high sensitivity and specificity and can be used for preparation of a FISH probe. The FISH probe easily enters cells and has a fast hybridization reaction rate. Through a specific hybridization buffer, the hybridization time can be shortened to 1 to 2h.

The invention discloses a detection system for the grouting quality of a fabricated structure. Meanwhile, the invention discloses a method for detecting the grouting quality of the fabricated structure by applying the detection system. A plurality of data can be acquired at one time; accurate and stable results are ensured by analyzing a plurality of data; the graduated scale on the device can directly record the defect position and size; a movable adjusting seat can be used for sleeves with different lengths; the position thickness and inclination angles corresponding to a plurality of measuring points are tested; through a mathematical relation, the wave velocity of each point is calculated in sequence, the wave velocities of the test signals are compared according to a wave velocity curve graph obtained by calibrating the sleeve well on site, and then whether the sleeve has defects or not or whether the defects are located at specific positions or not is judged. The on-site personnel testing is greatly facilitated through the detection system, and then the test efficiency and accuracy are improved.

The invention discloses an offshore wind power unmanned inspection ship control system and a working method thereof, and belongs to the technical field of offshore wind power operation and maintenance. The system comprises a first wireless communication module, a first positioning module, a second wireless communication module, a second positioning module, a distance measurement module and an obstacle identification module. The first wireless communication module and the first positioning module are arranged on a tower drum of each offshore wind turbine, and the first wireless communication module is connected with the first positioning module; the second wireless communication module, the second positioning module, the distance measurement module and the obstacle identification module arearranged on an unmanned inspection ship, the second wireless communication module, the second positioning module, the distance measurement module and the obstacle identification module are connectedwith an unmanned inspection ship control module, and the second wireless communication module is in communication connection with the first wireless communication module. The system can effectively improve efficiency of offshore wind power unmanned inspection, is high in automation degree, reduces labor cost, decreases operation cost, and improves safety and stability of offshore wind power operation and maintenance.