39results about How to "Meet the input requirements" patented technology

The invention provides a input buffer circuit for high-speed pipeline analog-to-digital converter (ADC). The input buffer circuit comprises an input pair transistor, a current mirror load, a gain-boosted amplifier and a compensation capacitor, wherein the input pair transistor consists of a first MOS (metal oxide semi-conductor) transistor and a second MOS transistor of a source negative-feedback resistor; the current mirror load consists of a third MOS transistor and a fourth transistor which are connected to each other by a gate; the positive input terminal of the gain-boosted amplifier is connected with the drain of the first MOS transistor, the negative input terminal thereof is connected with the drain of the second MOS transistor, and the output terminal thereof is connected with the gate of the third MOS resistor; and one terminal of the compensation capacitor is connected with the gate of the third MOS transistor, and the other terminal thereof is connected with the drain of the third MOS transistor. The input buffer circuit of the invention is capable of meeting the requirements for the input of high-speed signals, effectively reducing the inputted load capacitance and increasing the outputted impedance.

The invention discloses a powdery active carbon regeneration system and a powdery active carbon preparation method, and belongs to the field of waste treatment. The powdery active carbon regenerationsystem comprises a roller granulating device, a regeneration heating furnace and a gas burning device which are sequentially connected. The system and the method have the advantages of realization ofthe regeneration treatment and cycle use of powdery active carbon, reduction of the pollution to the environment, reduction of the use cost of active carbon, simple process flow, and no secondary pollution in the production process.

The invention relates to a crop plantation space layout optimization method based on an intelligent optimization algorithm, in particular to a crop plantation space layout optimization method based onan improved Cuckoo algorithm, and belongs to the field of geographic space layout planning. The method aims at a crop plantation layout optimization problem to redefine an individual coding way, an initial layout scheme generation method and a multi-objective function and constraint condition processing method in the Cuckoo algorithm on the basis of a Cuckoo algorithm framework, a one-to-one mapping relationship of the problem and the Cuckoo algorithm is established, and a cross replacement strategy and a local update strategy, which aim at the space layout, are put forward so as to establishthe information exchange and update mechanism of a Cuckoo individual again to meet crop space layout optimization requirements. Meanwhile, the method is combined with a Pareto multi-objective processing technology, and various candidate schemes can be generated to provide decision support for decision makers. By use of the cross replacement and local update strategy put forward by the invention,the convergence efficiency and the solving accuracy of the algorithm are improved.

The invention relates to a method used for improving Doppler sound quality in a color ultrasound system, which bases on the steps as follows: a digital signal processor is utilized to complete the former treatment to ultrasonic echo signals; the DSP sends sound signals to a programmable device gradually with batches; a programmable chip completes the serial-parallel transformation on data, and restores sound data of a positive blood stream and a reverse blood stream; every adjacent data is supplemented with seven zero; a 63-step FIR is utilized to complete up-sample filtering, and eight special multipliers of the programmable chip are used; an interpolated point is obtained through adding up the arithmetic products between eight original point data and interpolated coefficients, the coefficients are switched by turns, all the coefficients are just used after switching for eight times, and eight up-sample filtering data is obtained finally; and the up-sample filtering data is stored into an FIFO, and then is output to a DAC chip in a uniform speed manner. The method utilizes the programmable chip to perform up-sample processing on part of the sound signals, increases the sampling efficiency under lower PRF without increasing the cashe, and reduces the distortion of DAC inband high frequency signals so as to improve the Doppler sound quality.

The present invention discloses a distributed data acquisition device based on a microprocessor. The distributed data acquisition device based on the microprocessor comprises a plurality of distributed prepositive workstations, an RS232 bus, and a simulation multi-path switch control unit connected with a PC. Each distributed prepositive workstation is composed of a signal conditioning circuit, the microprocessor with a multi-channel A/D converter and an RS232 communication interface, and the simulation multi-path switch control unit comprises a communication interface expansion circuit, the microprocessor and the RS232 communication interface. The data acquisition device can obtain the multi-channel data synchronously and real-timely, adopts a distributed structure, forms a data detection network by the cooperation of the plurality of workstations, is flexible in system layout, simple and convenient in channel expansion, low in cost and good in low power consumption performance, at the same time, avoids the resource waste effectively, and also has the very high reliability and the good data real-time performance on the condition of many channels, and can satisfy the actual application requirement.

The invention discloses a BiGRU network drilling working condition identification method in combination with an attention mechanism, and the method employs a large amount of actual data generated during drilling as a basis, carries out a series of data enhancement methods, and solves a problem that the number of samples is small to the greatest extent. In order to weaken a black box effect during machine learning, a decision tree recognition model guided by a semi-empirical formula combined with actual data is designed to assist manual data annotation. For sequential well drilling information, a two-way gate control unit network capable of extracting sequence features is used for assisting an attention mechanism to train a model, and strict parameter adjustment is carried out. Finally, data of a single well which does not participate in training is used, and generalization ability testing of the model is carried out on the premise that transfer learning and pre-training are not carried out; comparison experiments prove that the method ensures feasibility and universality under the condition of high accuracy in drilling working condition time sequence prediction, and has practical application value.

The invention discloses a device with the man-machine interaction functions of game and massage, and the device comprises an intelligent grip ball which is used for collecting, recording and analyzing gripping force data and the data of position changes of a ball, operating a game of an intelligent terminal, controlling the massage force and frequency of a matched massage paster according to the size and frequency of gripping forces, and achieving the man-machine interaction; and the massage paster which is used for cooperating with the intelligent grip ball to massage a human body, receiving a control signal transmitted by the intelligent grip ball, and achieving the social interaction. The intelligent grip ball and the massage paster are respectively provided with an internal hardware circuit. A sensor employed by the device is low in cost, but can meet the input requirements of most of game instructions, can support most of cellphone games and small-scale gams in computers and televisions. Because the size of the device is small and the device is portable, the device can enable most of persons to combine body building and game playing when the persons are off working or learning.

The invention discloses a reusable virtual keyboard implementation method based on JavaScript and an application thereof. The method comprises the following steps: S1, compiling a virtual keyboard JS file and a virtual keyboard CSS file; s2, introducing the JS file and the jQuery library of the virtual keyboard into a project of a to-be-realized virtual keyboard function through a Script tag, and introducing the CSS file of the virtual keyboard through a link tag; and S3, binding a method for calling the virtual keyboard for the input box element in the item of the to-be-realized virtual keyboard function. According to the method, the virtual keyboard can be awakened by clicking the input box by utilizing the traditional front-end technology, and the method has the advantages of low development cost, good compatibility, easiness in transplantation, more functions and individuation.

The invention discloses a steam coal separation process. The steam coal separation process comprises the steps that raw coal is subjected to dry method deep classification through a double-layer elastic classifying screen, first-layer plus sieve materials of the double-layer elastic classifying screen enter a crusher, the first-layer plus sieve materials after crushing and second-layer plus sieve materials of the double-layer elastic classifying screen enter a desliming screen together to be subjected to dry desliming, and minus sieve materials of the double-layer elastic classifying screen and minus sieve materials of the desliming screen serve as slack coal products; plus sieve materials of the desliming screen enter a gravity separator for separation, light products and heavy products after separation are subjected to medium removal and dehydration, then clean coal and gangue products are obtained, minus sieve materials after medium removal and dehydration enter a slime water treatment system to be treated, and washing water closed cycle of the system is realized. The steam coal separation process is simple, production is steady and efficient, the steam coal separation has the advantages that the preparation proportion is high, the feed size range is wide, separation precision and adaptability are high, production cost is low and the like, and good economical and practical benefits are achieved.

The invention relates to drying equipment for agricultural products and a drying control method, and belongs to the technical field of agricultural machines. The drying equipment structurally comprises a dehumidification system, a heating system and a drying system, and all the systems are connected through pipelines to form loops. The dehumidification system comprises a dehumidification film assembly, the heating system comprises a compressor, a condenser for heating a drying medium, an expansion valve, an evaporator for cooling and dehumidification and a humidification device, and the drying system comprises a drying box. A monitoring device electrically connected with a main machine is arranged in the drying box, and each loop is provided with a three-way valve and a temperature and humidity sensor which are electrically connected with the main machine. The drying equipment for agricultural products and the drying control method have the advantages that air is dehumidified through the low-energy-consumption and high-efficiency dehumidification performance of a dehumidification film, a heat pump is used for auxiliary heating, and the purposes of improving the drying efficiency of the drying system and reducing energy consumption are achieved.

A temperature-resistance curve acquisition apparatus of a distribution transformer winding and a method thereof are disclosed. The temperature-resistance curve acquisition apparatus of the distribution transformer winding comprises a voltage sampling module, a wireless temperature sensor and a single chip microcomputer, wherein the voltage sampling module is used to sample a voltage difference of two ends of the heated distribution transformer winding so as to acquire voltage sampling data; the wireless temperature sensor is used to sample a temperature of the heated distribution transformer winding so as to acquire temperature sampling data; the single chip microcomputer is used to convert the voltage sampling data into resistance sampling data; according to the resistance sampling data and the temperature sampling data, a curve of changes of direct current resistances of the distribution transformer winding along with the temperatures is generated. By using the temperature-resistance curve acquisition apparatus of the distribution transformer winding and the method provided in the invention, the single chip microcomputer is used to carry out synchronization on data of an analog-digital converter and data sampled by the wireless temperature sensor so that accuracy of a temperature-resistance curve of the distribution transformer winding is increased.

The invention discloses an AI acquisition device, which performs common-mode voltage adjustment and differential-mode gain adjustment on a differential voltage signal converted by a differential voltage acquisition circuit through a differential amplifier so as to meet the input requirement of an analog-to-digital converter, so that the analog-to-digital converter performs analog-to-digital conversion on the differential voltage signal to obtain a digital signal, therefore, AI collection is completed. Besides, on one hand, the anti-aliasing matching circuit can be used as a low-pass filter to filter high-frequency interference and improve the acquisition precision, and on the other hand, the anti-aliasing matching circuit can store and raise the potential of the input end of the differential amplifier through the electric energy of the anti-aliasing matching circuit and improve the sampling frequency of the analog-to-digital converter, namely, the acquisition speed of the AI is improved. The invention also discloses an AI acquisition system which has the same beneficial effects as the AI acquisition device.

The invention discloses a radio frequency channel real-time protection and undistorted transmission circuit suitable for an ultrashort wave frequency band and a configuration method thereof, and the circuit comprises a broadband amplification circuit, the in-phase input end and output end of which are respectively connected with an RFIN and an output RFOUT; the in-phase input end of the detection driving circuit is connected to the output end of the broadband amplification circuit; the input end of the detection circuit is connected to the output end of the detection driving circuit; and the input end and the output end of the linear optocoupler feedback circuit are respectively butted with the output end of the detection circuit and the inverted input end of the broadband amplification circuit. The circuit can work in a frequency band of 30MHz-88MHz, can be used for a driving end of a radio frequency power amplifier of an ultra-short wave radio station, and can also be used for anti-burning of a receiving channel of the ultra-short wave radio station and input protection of intermediate frequencies of ADC ends of various receivers. Comprising a low-noise broadband current feedback operational amplifier, a linear optocoupler and the like. The low-noise broadband current feedback operational amplifier has the advantages that the working frequency is high, the anti-burning power can reach 2W, the gain adjustment is convenient, the price is low, and the like.

The invention relates to a servo power module. The servo power module includes a power module set and a discharge circuit, wherein the power module set is composed of multiple power modules connected in series, each power module has different voltage and power outputs, the multiple power modules are combined in series, so the relatively large voltage and power outputs can be achieved by the power module set, the limitation of the high power output of the servo power module in the prior art can be overcome, the servo power module is made to have relatively high power density, instantaneous power output capacity is improved, and power input requirements of a motor are met. In addition, the servo power module has high power density, so the size and the weight of the servo power module can be reduced, moreover, the servo power module is provided with the discharge circuit, a pumping voltage generated by the motor superposed at an output end of the power module set can be suppressed, stability of the output end voltage of the servo power module is guaranteed, and thereby stability of power supply of a latter device is further guaranteed.

The invention discloses a liquid weight data acquisition circuit of a body cavity hyperthermal perfusion treatment machine. The liquid weight data acquisition circuit is composed of a weight detectingcircuit, a differential amplifying circuit and a level matching circuit. The weight detecting circuit, the differential amplifying circuit and the level matching circuit are successively connected electrically. The weight detecting circuit detects liquid weight change in the container. After a milivolt-grade electric signal is generated, the differential amplifying circuit performs amplification.The level matching circuit performs zero-value adjustment and satisfaction adjustment on an input amplifying circuit so that the output signal of the liquid weight data acquisition circuit has accurate zero value and accurate satisfaction value. Furthermore the output signal level is between 0 and +5V and matches an input interface signal level of a data acquisition analog quantity, thereby satisfying an analog-to-digital conversion input requirement. Furthermore the liquid weight data acquisition circuit has effects of reducing distortion rate and improving interference resistance of a transmitted signal.

The invention relates to a miniature multichannel sensor signal preprocessing module which has a modular circuit form and an independent packaging structure. The miniature multichannel sensor signal preprocessing module has advantages of relatively high integration degree, small size, high suitability for different hardware platforms and different embedded data acquisition systems with different structure forms, and high application flexibility. The signal preprocessing module has a unified electrical interface. When the type and the number of the sensors of the data acquisition system change,changing of the signal preprocessing module is required, and re-designing of the printed circuit is not required. The signal preprocessing module realizes high integration degree of a signal processing circuit between a sensor and an A/D conversion circuit, thereby supplying power supply excitation and signal processing for multiple types of sensors, and reducing complexity in hardware designingof the data acquisition system. The signal preprocessing module optimizes and solidifies the principle and printed circuit board designing of different types of sensor signal processing circuits. Noise of a signal chain is effectively reduced, and total precision of the data acquisition system is improved.

The invention discloses a diagnosis system based on multipath acquisition of gearbox operation vibration data. The diagnosis system comprises a sensor excitation output circuit, a double-amplificationcircuit, a synchronous analog-to-digital conversion circuit and a diagnosis module, wherein the sensor excitation output circuit is used for outputting a gearbox vibration signal; the double-amplification circuit is used for amplifying the gearbox vibration signal to generate two paths of amplified signals; the synchronous analog-to-digital conversion circuit is used for converting the two pathsof amplified signals into digital signals; and the diagnosis module is used for outputting and selecting the valid digital signal to monitor a gearbox operation vibration state. According to the diagnosis system, the double amplification circuits are arranged, the small gearbox operation vibration signal is amplified by a certain multiple to meet the input requirement of the analog-to-digital converter, meanwhile, the signal gearbox operation impact large can be reduced by a certain multiple to meet the input requirement of the analog-to-digital converter, the measurement precision of the signal within the full output range is improved, and the abnormity of the monitoring signal can be found in time.

The invention provides a rotating shaft angle and speed measuring device to improve the measuring precision of an existing rotating shaft angle and speed measuring device. The structure of the devicecomprises a permanent magnet, a chip integrated with a magnetoresistive sensor, and a PCB circuit board. A number of chips are arranged on the upper end face of the PCB circuit board. A number of counter bores are arranged in the lower end face of the PCB circuit board. The axis of each counter bore passes through the centroid of a chip. The permanent magnet and the PCB circuit board are firmly connected through the counter bores. The magnetoresistive sensor is provided with a first power supply connection end, a grounding end, a first signal output end and a second signal output end. The first signal output end is connected in series with a first resistor and is electrically connected with a second power supply connection end. The first signal output end is connected in series with a second resistor and is grounded. The second signal output end is connected in series with a third resistor and is electrically connected with the second power supply connection end. The second signal output end is connected in series with a fourth resistor and is grounded. According to the invention, the connection relationship between the permanent magnet and the PCB circuit board is improved, and the detection sensitivity is greatly improved.