13 results about "Signal amplification" patented technology

The invention relates to the technical field of fluid measurement, and provides a flow rate measuring system and a flow rate measuring method for multi-phase fluid. The system comprises a measurement module, a signal amplification module, a data processing module and a terminal module which are connected in turn, wherein the measurement module at least comprises two measurement devices arranged on a pipeline at a certain interval, and the two measurement devices respectively measure the content of the same element passing the sections where the devices are positioned by a nuclear physics method; the signal amplification module is respectively connected with the two measurement devices and amplifies signals acquired by measurement; and the data processing module converts the signals into digital signals first, then performs digital lowpass filtering treatment and quantization treatment on the digital signals, establishes a mathematical model by utilizing a cross-correlation function principle, performs data analysis treatment on the digital signals, and outputs results of a flow and a flow rate to the terminal module. The system and the method reduce the measuring complexity, reduce corresponding errors caused and improve measuring accuracy and reliability.

The invention discloses a soot-blowing control device for a boiler furnace based on heat flow online measurement, which comprises a heat flow sensor, a multiplexer, a data collector and an industrial personal computer, wherein the heat flow sensor is arranged on a film-type water wall fin at the periphery of the boiler furnace and connected to the input end of the multiplexer and used for transmitting collected heat flow to the multiplexer; the multiplexer is sequentially connected with the data collector and the industrial personal computer and used for multi-channel switching, signal amplifying and filtering; the data collector is used for converting a heat flow analog signal to a digital signal; and the industrial personal computer is used for analyzing the digital signal transmitted from the multiplexer and sending a soot-blowing signal. The invention can be used for various coal-fired power plants; and according to fouling conditions of heating surfaces in each region of the boiler furnace, realizes the sweeping in a demand quantity for the required region, improves the accuracy and the real time of fouling diagnosis for the heating surfaces of the boiler furnace, reduces the boiler failure, prolongs the lifetime of a soot-blower, saves the maintenance workload of the soot-blower, and the like.

The invention discloses a chromium-based functional nucleic acid sensor and an application thereof in the technical field of metal ion detection. The sensor comprises a molecule recognition element, asignal amplification element and a signal conversion element, wherein the molecule recognition element comprises chromium ion deoxyribozyme consisting of a substrate chain and an enzyme chain; the signal amplification element comprises an isothermal amplification system and hemin, and the isothermal amplification system comprises an amplification template; the signal conversion element comprisesa color developing agent. The sensor is based on the chromium ion deoxyribozyme, an isothermal index amplification reaction and a G-quadruplex liquid phase sensing technology, is convenient, quick, high in sensitivity, high in specificity and resistant to high salinity in chromium ion detection and can be used in field detection of chromium ions in the environment.

A sensor device is provided with a voltage detection type sensor unit for converting a physical quantity into a voltage value and outputting a voltage signal indicating the voltage value; a chopper amplifier unit for generating a modulation signal by chopping the voltage signal output from the sensor unit with a predetermined chopping frequency, amplifying the modulation signal into an amplification signal, then demodulating the amplification signal and outputting it as an output signal; an integration unit including an operational amplifier, an input resistor connected to the inverting input terminal of the operational amplifier and a capacitor connected between the inverting input terminal and an output terminal of the operational amplifier; and a digital conversion unit for converting the output signal integrated by the integration unit into a digital signal.

The invention discloses a high-salinity-resistant nucleic acid sensor for copper and application thereof. The sensor comprises a molecular recognition element, a signal multiplication element and a signal conversion element, wherein the molecular recognition element comprises copper ion deoxyribozyme; the copper ion deoxyribozyme consists of a substrate chain and an enzyme chain; the signal multiplication element comprises an isothermal amplification system; the isothermal amplification system comprises an amplification template; the signal conversion element comprises hemin and a color developing agent. The sensor provided by the invention is used for specifically recognizing a copper ion; the primary enlargement and conversion of a signal are carried out through an isothermal index multiplication reaction; a G-four-chain body structure with activity is formed under the induction of the hemin; the color developing agent is catalyzed to develop a color, thus, secondary multiplication and conversion are generated; the signal is converted into a visual signal, and the qualitative and quantitative detection in a high-salinity environment can be carried out.

The invention relates to a program controlled trigger and a method. A Hall current sensor senses current of a welding machine and outputs a voltage sensing signal; a signal amplifier amplifies the voltage sensing signal; a Schmitt trigger processes the amplified voltage sensing signal and triggers to generate a square signal; a singlechip captures rising edges and falling edges of the square signal, counts, and generates a pulse signal when a counting value reaches a set value; the singlechip regulates and controls the position of a tap of a digital potentiometer; an outputting pulse circuit outputs the pulse signal to an external high-speed camera; and the digital potentiometer regulates a forward threshold value and a reverse threshold value of the Schmitt trigger according to the position of the regulated and controlled tap, and carries out program control on the threshold values and pre-amplification times. Compared with the prior art, the program controlled trigger runs stably, carries out program control on the threshold values and the pre-amplification times, and can adapt to different welding environments.

A device is disclosed that includes an amplification part for a linear transmitter, the amplification part being configured to amplify a transmission signal in accordance with a supply voltage control signal; a generation part configured to generate a power supply signal showing the level of the transmission signal; and a control part configured to output the supply voltage control signal based on the power supply signal. The control part includes a storage part configured to store a series of values of the power supply signal belonging to a time range including a certain point of time; and an output part configured to output a maximum one of a predetermined number of values of the series of values of the power supply signal as the supply voltage control signal at the certain point of time.

The invention relates to an antiferromagnetic resonance radio frequency identification ticket management terminal. The antiferromagnetic resonance radio frequency identification ticket management terminal comprises a control unit, a modulation circuit, a power amplifying circuit, a frequency generating circuit, a demodulation circuit, a signal amplifying circuit and a radio frequency antenna circuit. Compared with the prior art, the antiferromagnetic resonance radio frequency identification ticket management terminal has the advantages that first, perfect combination of anti-fake material, digital signals and instrument identification rather than a single-manner anti-fake method is achieved on the basis of the antiferromagnetic resonance radio frequency identification technology; second, the antiferromagnetic resonance radio frequency identification material cannot be simulated; third, signal extraction is diverse, several sets of antiferromagnetic resonance effects are extracted, several parameters of an antiferromagnetic resonance radio frequency identification characteristic curve are selected, and the signals can be processed safely and flexibly;fourth, information can be read in a flexibly changing mode; fifth, the recovery scheme for the system can be restored fast after an accident happens, a same label and the system continue to be used, only an identifier needs to be tuned, the identifier can read more antiferromagnetic resonance radio frequency identification signals after being tuned, speed is high and cost is very low.

The invention discloses a gas chromatograph FID (Flame Ionization Detector) detection circuit, which belongs to the technical field of gas chromatographs and comprises a signal amplification unit, a zero-crossing comparison unit and an ADC (Analog to Digital Converter) sampling unit, the signal amplification unit is used for receiving the flame electric signal, amplifying the flame electric signal and outputting the flame electric signal to the zero-crossing comparison unit; the zero-crossing comparison unit is used for receiving and comparing the amplified flame electric signals and outputting the flame electric signals to the ADC sampling unit; and the ADC sampling unit is used for receiving and collecting the compared signals and outputting the signals to the single chip microcomputer. According to the detection circuit provided by the invention, the hydrogen flame ionization detector can detect wide-range weak current 10 <-14 >-10 <-9 > A, noise can be reduced, amplification and detection of tiny signals are realized, and the precision and sensitivity of the detector are improved. The gas chromatograph detector can be widely applied to gas chromatograph equipment, and the precision and the stability of data acquired by a portable gas chromatograph are improved compared with those of a conventional detector.

The invention is related to quanta secret communication, especially related to capacity balanced and narrow gating pulse restrained module of ADP single photo detection circuit. The module of circuit is composed of signal detection circuit; signal amplifying circuit, balance and suppression circuit and generating circuit for logic signals. Except variable capacity, the balance and suppression circuit is identical to signal detection circuit and signal amplifying circuit in circuit connection and parameters of each component. Advantages are: realizing detection of single photo in near-infrared band, symmetric circuit in balanced mode neutralizes surge and over shock, high efficiency and low noise.