37results about How to "Accurate signal detection" patented technology

The present invention provides an OOB detection circuit capable of making accurate signal determination even in the case where a characteristic fluctuation occurs in an analog circuit, thereby preventing deterioration in the yield of a product. To an amplitude determining circuit, a characteristic adjustment register for changing setting of an amplitude threshold adjustment mechanism for distinguishing a burst and a squelch from each other provided for the amplitude determining circuit is coupled. The characteristic adjustment register is controlled by a self determination circuit. An output of the amplitude determination circuit is supplied to a time determining circuit and also to the self determination circuit. On the basis of the output of the amplitude determining circuit, the self determination circuit controls the characteristic adjustment register.

A method for accurate signal detection begins by receiving a radio frequency signal, which is then converted into baseband signals. The processing then continues by performing a normalized auto correlation on the down-converted baseband signal to produce a normalized auto correlation signal. The process continues by performing a periodic pattern detection on the down-converted baseband signal to produce a normalized detected periodic signal. The process then continues by comparing the normalized auto correlation value with an auto correlation threshold and by comparing the normalized detected periodic signal with a set of thresholds. When the normalized auto correlation value compares favorably with the auto correlation threshold and when the normalized detected periodic signal compares favorably with the set of thresholds, the down-converted baseband signal is indicated to be a valid signal.

A user calls a directory assistance service provider to search for a desired telephone number and be connected to a party at the desired number. In one such connection, the user is afforded enhanced directory assistance upon a user command in the form of an out-of-band signaling message, e.g., SS7 signaling message. For example, the user may be afforded further operator assistance by pressing on the user telephone a predetermined key (e.g., “*” key), which is detectable by the directory assistance service provider as an SS7 signaling message.

Signal detection circuitry for a serial interface oversamples the input—i.e., samples the input multiple times per clock cycle—so that the likelihood of missing a signal is reduced. Sampling may be done with a regenerative latch which has a large bandwidth and can latch a signal at high speed. The amplitude threshold for detection may be programmable, particularly in a programmable device. Thus, between the use of a regenerative latch which is likely to catch any signal that might be present, and the use of oversampling to avoid the problem of sampling at the wrong time, the likelihood of failing to detect a signal is greatly diminished. Logic, such as a state machine, may be used to determine whether the samples captured s do or do not represent a signal. That logic may be programmable, allowing a user to set various parameters for signal detection.

More accurate signal detection circuitry in serial interfaces, particularly on a programmable integrated circuit device, such as a PLD, includes a high-speed, high-resolution, high-bandwidth comparator, along with digital filtering, to reduce the effect of process, temperature or supply variations. The comparator is used to compare a direct input signal with a programmable reference voltage, and, in a preferred embodiment, can detect the signal level within 8 mV accuracy. The output of the comparator may then be digitally filtered. Preferably, both a high-pass digital filter and a low-pass analog filter may be used to eliminate glitches and low-frequency noise. Preferably, the digital filters are programmable to adjust the sensitivity to noise. The filtered output is then latched and output to indicate receipt or loss of signal. This signal detect circuitry can operate reliably at data rates as high as 7 Gbps.

Provided is a semiconductor laser drive circuit which is capable of preventing deterioration in an extinction ratio caused by a bias current so as to detect signals accurately and optimal for time-division telegraphy in a PON system or the like. The semiconductor laser drive circuit is equipped with a semiconductor laser, a bias current feed means which feeds a bias current to the semiconductor laser, and a modulating current feeding means which feeds a modulating current to the semiconductor laser on the basis of inputted modulating signals. The bias current is fed to the semiconductor laser at least during a period the modulating current is fed to the semiconductor laser, and stopped when the modulating current is stopped.

The invention discloses a hydraulic driving device for a thickener. The hydraulic driving device for the thickener comprises a driving device formed by a power source, a speed reducer and an output shaft, wherein the power source is connected with the speed reducer. The hydraulic driving device for the thickener is further provided with a hydraulic lifting device formed by a hydraulic oil cylinder and a guiding shaft, the hydraulic oil cylinder and the guiding shaft are connected through a piston rod, the hydraulic oil cylinder is arranged above a connecting plate, and the guiding shaft is arranged below the connecting plate. An advanced and reliable electrohydraulic combined control system is adopted, pressure of a hydraulic system serves as control signals, the hydraulic driving device for the thickener can automatically lift a rake according to the resistance which a rake arm is subjected to, signal detection is comprehensive and accurate, motions are safe and reliable, and rake pressing is avoided.

A method, system and apparatus for notifying and determining an antenna port location relationship are disclosed. A network side configures an indication signaling of a CSI-RS referenced by a DMRS, and / or a first enabling indication signaling used for indicating whether the indication signaling of the CSI-RS referenced by the DMRS is enabled; or the network side further configures an indication signaling of a CRS referenced by each set of CSI-RSs which are quasi-co-located, and / or a second enabling indication signaling used for indicating whether the indication signaling of the CRS referenced by each set of CSI-RSs which are quasi-co-located is enabled. In the above scheme, a terminal is enabled to determine a reference signal port referenced in time-frequency synchronization, thereby providing a time-frequency synchronization precision.

The present invention provides an OOB detection circuit capable of making accurate signal determination even in the case where a characteristic fluctuation occurs in an analog circuit, thereby preventing deterioration in the yield of a product. To an amplitude determining circuit, a characteristic adjustment register for changing setting of an amplitude threshold adjustment mechanism for distinguishing a burst and a squelch from each other provided for the amplitude determining circuit is coupled. The characteristic adjustment register is controlled by a self determination circuit. An output of the amplitude determination circuit is supplied to a time determining circuit and also to the self determination circuit. On the basis of the output of the amplitude determining circuit, the self determination circuit controls the characteristic adjustment register.

The invention discloses an anti-collision safety early warning system for an elevator landing door. The system comprises a mounting rack which is arranged on the front side of the landing door, the mounting rack is composed of a top rod, a left-side rod and a right-side rod, the top rod is provided with a landing door opening detection device used for detecting whether the elevator landing door isopened or not, and the opposite positions of the left-side rod and the right-side rod are provided with article existence and absence detection device used for detecting whether an article exist in front of the landing door or not; the system further comprises a control module and an alarm lamp, the landing door opening detection device, the article existence and absence detection device and thealarm lamp are connected with the control module correspondingly. According to the system, the signal is more accurate, the situation that a person easily triggers the system to cause false alarm whenthe person walks in a passageway can be avoided to the maximum degree, moreover, the influence caused by the temperature of a detected article and the temperature of the ambient environment is avoided, meanwhile, an active anti-collision intercepting device is installed, the impact risk is reduced to the largest extent through active intercepting, moreover, the system is completely independent and makes no contact with the control system of an elevator, so that no influence is caused to the elevator.

The invention discloses a portable vibration auxiliary drilling device, a hole making method and a processing signal detecting method, which belongs to the field of vibration auxiliary drilling processing. The device comprises a shell (1), a fixed inner shell (3), a movable inner shell (5), a conductive ring (8), a vibration unit (6), and a motor (12). The portable vibration auxiliary drilling device, a hole making method and a processing signal detecting method has advantages that: (1) adjusting the pre-tightening force, the size of the rear cover plate and the intermediate block to adjust the vibration frequency of the device, by using the piezoelectric ceramic driving mode, thereby obtaining excellent drilling performance; (2) real-time monitoring the speed, feed and the number of holesin the drilling process, to achieve intelligent processing, and reducing the adverse effects of human factors on the processing quality; (3) the mobile inner shell structure eliminates the interference signal during non-processing, and the signal detection is more accurate; (4) using a universal tool mounting structure to realize rapid tool change, which is simple and easy to implement in practical applications.

The disclosure relates to a system and a method for detecting pulses in received signals in a streaming manner. A threshold detection method is fused with a double-difference phase modulation detection method to provide a higher-performance method of pulse detection for any digital receiver. The first pulse detection technique uses a signal power threshold. When the square of the magnitude of a pulse crosses the signal power threshold, the beginning of a pulse is declared and pulse processing starts. The second pulse detection technique is model based and uses a windowed detector that crossesa phase difference threshold when the pulse has consistent second-order (in general d-th order) difference phase values within the window. The first technique has low latency and is independent of pulse width, but only operates well at SNR values greater than 15 dB. The second technique has higher latency and requires a minimum pulse width, but operates at lower (approximately 0 dB) SNR values.

The invention discloses an alternating current and direct current sensor comprising a magnetism collecting ring; a magnetic field detection module is connected to the circle of the magnetism collecting ring; the output end of the magnetism collecting ring is connected to the input end of the magnetic field detection module; the sensor further comprises a circuit module comprising an analog circuitand a digital circuit; the output end of the magnetic field detection module is connected to the input end of the analog circuit; the output end of the analog circuit is connected to the input end ofthe digital circuit; the magnetism collecting ring further comprises a first opening and closing part; and the magnetism collecting ring is opened or closed through the first opening and closing part. According to the alternating current and direct current sensor, electrified detection can be performed on power devices; the current change of the microampere level can be accurately detected; and universality to the power devices with alternating current and direct current is realized.

The invention discloses a distributed deep hole signal acquisition device which comprises a signal acquisition unit, a signal processing unit and a microprocessor. The signal acquisition device is arranged in a deep hole. The signal acquisition unit acquires a demodulating signal. The signal processing unit processes the demodulating signal for obtaining a digital signal, acquires data information which is related with an underground pressing crack condition according to the digital signal, and uploading the data information to an overground monitoring host computer. The distributed deep hole signal acquisition device is arranged in the deep hole and can acquire more accurate deep signals.

The invention discloses an ultrasonic flowmeter which comprises a measuring pipe, one ultrasonic transmitting transducer and at least two ultrasonic receiving transducers, wherein the ultrasonic transmitting transducer is located on a pipe wall of the measuring pipe and is used for transmitting an ultrasonic signal and the ultrasonic receiving transducers are located on the pipe wall of the measuring pipe and are used for receiving the ultrasonic signal transmitted by the ultrasonic transmitting transducer. In the invention, the ultrasonic transmitting transducer is only used for transmitting the ultrasonic signal and the ultrasonic receiving transducers are only used for receiving the ultrasonic signal transmitted by the ultrasonic transmitting transducer. Compared with the ultrasonic transducer which has the function of transmitting and receiving the ultrasonic signal in the prior art, the ultrasonic flowmeter provided by the invention is more flexible in circuit treatment and simpler in control. Besides, the flow rate of the medium passing by the measuring pipe is calculated in the manner of arranging at least two ultrasonic receiving transducers for receiving the ultrasonic signal transmitted by the same ultrasonic transmitting transducer according to the invention, the flow state change caused by larger time interval can be greatly avoided and the signal detection is more accurate.

The invention provides a broadband vibration signal sensor and a signal processing device thereof. The broadband vibration signal sensor comprises: a base; a shell which is arranged on the base in a covering manner; a signal processing module which is arranged in the accommodating cavity or outside the accommodating cavity; a piezoelectric component which is arranged in the accommodating cavity and is stacked on the base; a piezoelectric element which is arranged in the accommodating cavity and is stacked on the piezoelectric component; and an elastic element which is arranged in the containing cavity and stacked on the piezoelectric element,whereinthe side, away from the piezoelectric element, of the elastic element is connected to the inner wall of the shell. According to the broadband vibration signal sensor provided by the invention, the piezoelectric element and the piezoelectric component are arranged, and the piezoelectric element is stacked on the piezoelectric component, so that low-frequency vibration signals and high-frequency vibration signals generated at the same position can be collected, errors caused by different mounting positions of the sensor during independent measurement are reduced, and the measurement result is more accurate.

The invention provides an accurate detection device for a sliver of a carding machine. The accurate detection device comprises a detection box, a bell mouth, a detection mechanism and a sensor and is characterized in that the tail part of the bell mouth is provided with an opening and the bell mouth is fixed on a bell mouth fixing and adjusting plate arranged on the detection box. The detection mechanism comprises an upper press roller, a lower press roller, an upper press roller rotating support shaft and a lower press roller rotating shaft, wherein the lower press roller is connected with the upper press roller rotating support shaft, the lower press roller is fixed on the lower press roller rotating shaft, the upper and the lower press rollers are in a double raised roller manner, and detection bulges which are arranged in the upper and the lower press rollers and used for detecting thickness displacement of a sliver are inserted in the middle of the opening at the tail part of thebell mouth; one end of a lever detection arm is connected with the detection box, the other end of the lever detection arm presses the sensor in an elastic manner, and the middle part of the lever detection arm is connected with the upper press rotating support shaft. By the adoption of the accurate detection device, accuracy and reliability of sliver detection can be improved, manufacturing costcan be reduced and production efficiency can be improved; in addition, the accurate detection device has the advantages of reasonable and compact structure and low requirement on the processing and assembly accuracy of a detection point.

The invention relates to an infrared detector mirror image pixel and an infrared detector based on a CMOS process, the mirror image pixel comprises a CMOS measurement circuit system and a CMOS infrared sensing structure, the CMOS measurement circuit system and the CMOS infrared sensing structure are both prepared by using the CMOS process, and the CMOS infrared sensing structure is directly prepared on the CMOS measurement circuit system; the CMOS infrared sensing structure comprises a reflecting layer, an infrared conversion structure and a plurality of columnar structures, the reflecting layer, the infrared conversion structure and the columnar structures are located on the CMOS measurement circuit system, the columnar structures are located between the reflecting layer and the infrared conversion structure, the reflecting layer comprises a supporting base, and the infrared conversion structure is electrically connected with the CMOS measurement circuit system through the columnar structures and the supporting base; and the reflecting plate arranged on the same layer as the supporting base is etched. According to the technical scheme, the problems that a traditional MEMS process infrared detector is low in performance, low in pixel scale, low in yield and the like are solved.

The invention belongs to the technical field of intelligent garbage throwing, and discloses an intelligent garbage throwing control method, which comprises the steps that a login mode and a non-login mode of a garbage throwing user are set, and the user can select the login mode on a touch screen of an operation interface; in the non-login mode, an infrared sensor senses human body infrared signals within the range of a garbage throwing device, after successful sensing, a system starts the non-login mode, and a control system opens a throwing opening door for garbage throwing; in the login mode, the user enters the login mode through magnetic card swiping verification information, face recognition verification information, mobile phone number verification information or code scanning verification information, and after the information verification succeeds, the control system opens the throwing opening door for garbage throwing; and after the garbage is delivered by the user, a capacity limiting function is started, and a weighing sensor is used for weighing and detecting the garbage to obtain weighing data. According to the intelligent garbage throwing control method provided by the invention, the intelligence of garbage throwing can be improved, and the efficiency and accuracy of garbage throwing are improved.

The invention relates to a light-emitting diode (LED) energy-saving lamp intelligent control device and a control method; the device comprises an LED module, an LED driving circuit, a sensor, a timer, a single-chip microcomputer, a Zigbee network and a terminal computer. Firstly, the working periods of the LED module are set in the timer, the sensor acquires a signal, and the single-chip microcomputer analyzes the acquired signal and controls the LED module to light. Through the LED energy-saving lamp intelligent control device, the information of people and vehicles which pass by a lighting area can be detected in real time, so that a lamp is 'on' when the people or the vehicle pass by and 'off' when nobody or no vehicle passes by, the on-demand lighting is realized, a lighting device is not started if the brightness in the area is enough, and the purposes of lighting and saving energy are achieved to the largest extent; and the operation of the lighting device is monitored in real time, so that the service quality of a community management department is improved, and the life quality of the people in a community moves forward a new step.

The disclosure relates to an infrared detector mirror image element and an infrared detector based on CMOS technology. The mirror image element includes: CMOS measurement circuit system and CMOS infrared sensing structure are both prepared by CMOS technology, and directly prepared above the CMOS measurement circuit system CMOS infrared sensing structure; the infrared conversion structure is electrically connected to the CMOS measurement circuit system through the columnar structure and the supporting base; the infrared conversion structure includes an absorption plate and a beam structure located on the same layer, and the absorption plate converts the infrared signal into an electrical signal and passes through the beam structure It is electrically connected with the columnar structure; the absorption plate includes a metal structure on one side close to or away from the CMOS measurement circuit system, and at least part of the reflection plate is located in the orthographic projection of the metal structure. Through the technical proposal of the present disclosure, the problems of low performance, low pixel scale and low yield rate of infrared detectors in traditional MEMS technology are solved.

The invention provides an accurate detection device for a sliver of a carding machine. The accurate detection device comprises a detection box, a bell mouth, a detection mechanism and a sensor and is characterized in that the tail part of the bell mouth is provided with an opening and the bell mouth is fixed on a bell mouth fixing and adjusting plate arranged on the detection box. The detection mechanism comprises an upper press roller, a lower press roller, an upper press roller rotating support shaft and a lower press roller rotating shaft, wherein the lower press roller is connected with the upper press roller rotating support shaft, the lower press roller is fixed on the lower press roller rotating shaft, the upper and the lower press rollers are in a double raised roller manner, and detection bulges which are arranged in the upper and the lower press rollers and used for detecting thickness displacement of a sliver are inserted in the middle of the opening at the tail part of thebell mouth; one end of a lever detection arm is connected with the detection box, the other end of the lever detection arm presses the sensor in an elastic manner, and the middle part of the lever detection arm is connected with the upper press rotating support shaft. By the adoption of the accurate detection device, accuracy and reliability of sliver detection can be improved, manufacturing costcan be reduced and production efficiency can be improved; in addition, the accurate detection device has the advantages of reasonable and compact structure and low requirement on the processing and assembly accuracy of a detection point.

The invention relates to an infrared detector mirror image pixel and an infrared detector based on a CMOS process, the mirror image pixel comprises a CMOS measurement circuit system and a CMOS infrared sensing structure which are both prepared by using the CMOS process, and the CMOS infrared sensing structure is directly prepared on the CMOS measurement circuit system; the CMOS infrared sensing structure comprises a reflecting layer, an infrared conversion structure and a first columnar structure, and the infrared conversion structure is electrically connected with the CMOS measuring circuit system through the first columnar structure and the supporting base; the beam structure is located on the side, close to the CMOS measurement circuit system, of the absorption plate, the absorption plate comprises a metal structure close to or away from the side, close to or away from the CMOS measurement circuit system, of the CMOS measurement circuit system, and at least part of the reflection plate is located in the orthographic projection of the metal structure. According to the technical scheme, the problems that a traditional MEMS process infrared detector is low in performance, low in pixel scale, low in yield and the like are solved.

A wheel speed sensor driving mechanism includes a motorcycle front wheel hub axle tube having chamfered driving blocks equiangularly spaced around an inner perimeter thereof, a follower unit concentrically mounted in the motorcycle front wheel hub axle tube and having chamfered ribs equiangularly arranged around the periphery of one end of the worm wheel and a mounting groove defined between each two adjacent ribs for receiving the chamfered driving blocks. Further, the number of the ribs of the follower unit is divisible by the number of the driving blocks of the motorcycle front wheel hub axle tube.

A wheel speed sensor driving mechanism includes a motorcycle front wheel hub axle tube having chamfered driving blocks equiangularly spaced around an inner perimeter thereof, a follower unit concentrically mounted in the motorcycle front wheel hub axle tube and having chamfered ribs equiangularly arranged around the periphery of one end of the worm wheel and a mounting groove defined between each two adjacent ribs for receiving the chamfered driving blocks. Further, the number of the ribs of the follower unit is divisible by the number of the driving blocks of the motorcycle front wheel hub axle tube.

The invention relates to an infrared detector mirror image pixel and an infrared detector based on CMOS process, the mirror image pixel comprises a CMOS measurement circuit system and a CMOS infrared sensing structure which are both prepared by using the CMOS process, and the CMOS infrared sensing structure is directly prepared on the CMOS measurement circuit system; the CMOS infrared conversion structure is electrically connected with the CMOS measurement circuit system through first columnar structures and a supporting base; the beam structure is located on the side, close to the substrate, of an absorption plate, insulated second columnar structures and a patterned metal structure are arranged between the absorption plate and the beam structure, at least part of the reflection plate is located in the orthographic projection area of the patterned metal structure, and gaps are formed between the patterned metal structure and the beam structure and between the patterned metal structure and the absorption plate in the direction perpendicular to the substrate. According to the technical scheme, the problems that a traditional MEMS process infrared detector is low in performance, low in pixel scale, low in yield and the like are solved.