43results about How to "Meet various needs in practical applications" patented technology

The invention discloses a data acquisition system for non-contact detection of submarine pipeline potential distribution, and relates to the field of data acquisition systems. The data acquisition system includes: a communication cable, one end of which is electrically connected to a data set on land collector, the other end of which is electrically connected to a matrix potential sensor arranged underwater, the matrix potential sensor monitors the potential of the sea pipe, and at the same time transmits the pipeline potential data to the data collector through the communication cable, and the data acquisition processed and displayed. The data acquisition and processing performance of the data acquisition system is strong, the work performance is stable, the reliability is high, and the continuous operation in a complex environment is realized; and the structure of the data acquisition system is simple, the practicability is strong, and it has strong promotion and application Value, to meet a variety of needs in practical applications.

The invention discloses a single-channel synchronous acquisition device and method for multi-channel signal unipolar square wave modulation. The acquisition device collects N-channel signals through an analog-to-digital converter, and specifically includes: square wave controls at least two switch circuits On and off, at least 2 channels of measured signals pass through the switch circuit, the switch circuit is composed of an analog switch and a resistor, and the switch circuit realizes chopping and amplitude modulation; after the signals of different frequencies after amplitude modulation are added by the addition operation circuit, Digital signals are obtained through analog-to-digital conversion by a single-channel analog-to-digital converter; the invention realizes synchronous acquisition of multiple measured signals via a single-channel analog-to-digital converter, and has the characteristics of simple circuit, low cost and accurate measurement.

A solar insect trap lamp comprises a photometric circuit (1), a CPU control circuit (2), eight insect trap lamp groups (3), and a power supply circuit (4). The photometric circuit senses sunlight, converts the sunlight to a voltage signal (L-C) and outputs the voltage signal to the CPU control circuit. The CPU control circuit receives the voltage signal and controls the eight insect trap lamp groups to work or stop. The power supply circuit separately converts an 18V power supply into a 12V power supply and a 5V power supply by means of a solar cell panel (SUN). The 12V power supply supplies power to the eight insect trap lamp groups, and the 5V power supply supplies power to the photometric circuit. The solar insect trap lamp has a simple structure, and can make full use of solar energy and save energy.

The invention discloses a multi-path signal unipolar orthogonal square wave modulated single-path synchronous collection device and method. The collection device collects N paths of signals by a single-path analog-digital converter, and specifically comprises that the connection and disconnection of at least two switch circuits are controlled by orthogonal square waves, measured signals pass through a switch circuit consisting of an analogue switch and a resistor, and the switch circuit achieves chopping amplitude modulation; the signals with different frequencies after amplitude modulation are added by an add operation circuit, and then subjected to the analog-digital conversion of the single-path analog-digital converter to obtain a digital signal; a microprocessor processes the digital signal to demodulate out each measured signal. The multi-path signal unipolar orthogonal square wave modulated single-path synchronous collection device and method achieve that the multi-path measured signals are synchronously collected by the single-path analog-digital converter, and has the characteristics of being simple in circuit, low in cost and accurate in measurement.

The invention discloses a detection device of an oil-stolen orifice of a pipeline and a detection method of the center and the diameter of an oil-stolen orifice. A Hall element and a magnet are arranged on the inner detector of the pipeline; each hall element is provided with three pin slots to respectively place the three pins; the round orifice on the inner wall of the inner detector of the pipeline is used for placing a magnet. The Hall element is vertically inserted into the three pin slots. The Hall element in the pin slot is arranged in parallel with the magnet in the round orifice. Thedistance between the Hall element and the magnet is greater than 2mm; the magnet can magnetize the pipe wall. When the detector in the pipeline passes through the oil-stolen orifice, due to the largerelative magnetic permeability of the oil-stolen orifice, the magnetic lines near the oil-stolen orifice are bent and changed. The Hall element receives the induced magnetic field signal, namely the magnetic field characteristic signal; According to the identification of the magnetic field characteristic signal, the defect condition of the pipeline is discriminated, the position of the defect of the pipeline is positioned, and pipeline maintenance is carried out. Meanwhile, the method also detects the center and the diameter of the oil-stolen orifice and improves the detection accuracy of theoil-stolen orifice.

The invention discloses a method for optimizing quasi-three-energy-level solid-state laser conversion efficiency. A laser diode pump source emits pump light in an absorption band in a gain medium. Thepump light is focused in the gain medium through an energy transmitting fiber and a coupling lens group. The gain medium absorbs the pump light and forms population inversion. Quasi-three-energy-level laser oscillation is formed under the positive feedback effect of a laser resonant cavity formed by a laser full reflection mirror and a laser output mirror and is output via the laser output mirror. The light beam propagation direction of the laser gain medium is an x direction, and the two directions of a cross section are y and z directions. The projection of the doped portion of the laser gain medium in an xy plane is in a wedge shape. The laser gain medium is moved at the y direction so that the length of the doped portion which an optical path passes through at the x direction is changed. A concentration length product is optimized so as to achieve optimal conversion efficiency. Through a theoretical calculation result, the conversion efficiency of the existing quasi-three-energy-level solid-state laser is greatly increased in the invention.

The invention discloses a slide control method for the power fluctuation of a microgrid interconnection line. The slide control method comprises the steps of: structuring a power generation plan based on the output of the microgrid interconnection line according to the permeation rate of renewable energy sources, the power curve of temperature-controlled household equipment and the load curve of uncontrollable household equipment; acquiring the power of the renewable energy sources, the load and indoor temperature of non-response type household equipment, and the on-off state and rated power of the temperature-controlled household equipment in real time, working out a target value of aggregated load control response of the temperature-controlled household equipment and establishing a functional relation reflecting the state between the controllable variable of the operation state of a microgrid system and the temperature-controlled household equipment according to the power generation plane based on the output of the microgrid interconnection line, and acquiring the on-off state sequence control signal of the temperature-controlled household equipment for a next step; issuing an on-off state control instruction of the temperature-controlled household equipment by means of the on-off state sequence control signal; and acquiring the actual value of the aggregated load response of the temperature-controlled household equipment based on an equivalent thermodynamics parameter model of the temperature-controlled household equipment, thereby reducing the construction cost of a microgrid.

The invention discloses a device for detecting a small defect of a pipeline and a method for detecting a center and a diameter of the defect. Hall elements and magnets are mounted on a detector in thepipeline, wherein each Hall element is equipped with three pin slots for respectively placing three own base pins; circular holes in an inner wall of the detector in the pipeline are used for the placement of the magnets; the Hall elements are vertically inserted into the three pin slots; the Hall elements in the pin slots are mounted in parallel with the magnets in the circular holes; a distancebetween the Hall element and the magnet should be greater than 2 mm; the magnets can magnetize a pipe wall; when the detector in the pipeline passes through the small defect of the pipeline, the relative magnetic permeability of the small defect of the pipeline is large, a line of magnetic force near the small defect of the pipeline bends, a magnetic field signal induced by each Hall element is amagnetic field characteristic signal; the magnetic field characteristic signal is identified to identify a situation of the defect of the pipeline, locate a position of the defect of the pipeline andperform pipeline maintenance. Moreover, the method provided by the invention further detects the center and the diameter of the small defect of the pipeline to improve precision of detecting the small defect of the pipeline.

The invention discloses a multi-dimension subcarrier index activated high-spectral-efficiency multi-carrier modulation method, comprising the following steps of dividing bit information needing to betransmitted into real part index bits and imaginary part index bits, and mapping the real part index bits and the imaginary part index bits into corresponding constellation points according to a constellation diagram; at a transmitting end, taking former P<1> bits as the real part index bits, selecting k<q> subcarriers from n<q> subcarriers for real part activation, taking the latter P <2> bits asthe imaginary part index bits, and selecting the k<q> subcarriers from the n<q> subcarriers for imaginary part activation; carrying out constellation mapping on the rest P<3> bits and loading the P<3> bits on the real parts and the imaginary parts of the k<q> selected subcarriers; and at a receiving end, removing cyclic prefixes from received signals, monitoring activation states of demodulated signal real parts and imaginary parts, restoring the former P<1> bits and the latter P<2> bits, and restoring original information bits through constellation diagram inverse mapping based on the k<q> activated subcarriers.

The invention discloses a bipolar orthogonal square wave modulated one-way synchronous acquiring device and a bipolar orthogonal square wave modulated one-way synchronous acquiring method for multiple channels of signals. The acquiring device acquires N channels of signals via an analog-to-digital converter; orthogonal square waves control switching-on and switching-off of at least two switch circuits; at least two channels of measured signals pass through a switch circuit; the switch circuit consists of an analog switch, a resistor and an operational amplifier; bipolar orthogonal square wave amplitude modulation is implemented via the switch circuit; after the amplitude of signals is modulated, the signals with different frequencies are added together via an additive operation circuit; and the one-way analog-to-digital converter performs analog-to-digital conversion to obtain digital signals. Multiple channels of measured signals can be acquired synchronously by the one-way analog-to-digital converter. The bipolar orthogonal square wave modulated one-way synchronous acquiring device has the advantages of simple circuits, low cost and high measurement accuracy.

The invention discloses a pooling communication method between a highway electronic prepaid card and an encryption machine. The pooling communication method comprises the steps of defining a basic format of return data of the encryption machine, and defining a buffer area through the basic format; establishing a connecting pool object factory, an assembling thread and a reading thread by a server, verifying original data through the connecting pool object factory, putting the verified original data into the buffer area of the encryption machine in a message way through the assembling thread, and returning to an index of the buffer area; reading messages in the buffer area by the encryption machine, writing encrypted data according to the basic format, and transmitting the encrypted data into the buffer area according to the index; and reading the encrypted data in the buffer area by the server, transmitting the encrypted data to a card reader, sending the encrypted data to the highway electronic prepaid card by the card reader after the card reader receives the encrypted data, and calculating by the highway electronic prepaid card according to the encrypted data. According to the pooling communication method disclosed by the invention, the encryption effectiveness is increased, a system resource is prevented from being unused, and the working efficiency is increased.

The invention discloses a total-station spatial measuring and positioning method based on optoelectronic scanning and ultrasound distance measurement and belongs to the technical field of big-size three-dimensional coordinate measurement in the industrial scene. The method comprises the following steps that a lunching base station and a receiver are built; the position of an ultrasound lunching module on the lunching base station is calibrated; the positions of a first ultrasound receiving module and a second ultrasound receiving module on the receiver are calibrated; the horizontal angle alpha and the pitch angle beta of a photodiode are measured with a photoelectric scanning method; through an ultrasound distance measurement method, the distance between the first ultrasound receiving module and the ultrasound lunching module and the distance between the second ultrasound receiving module and the ultrasound lunching module are measured; and the space coordinate of the photodiode is calculated. According to the total-station spatial measuring and positioning method based on optoelectronic scanning and ultrasound distance measurement, the total-station spatial measuring and positioning is realized only by a single lunching base station under certain specific working environment, the measurement principle is simple, and various requirements in the practical application are satisfied.