33results about How to "Accurate and reliable sampling" patented technology

An ultrasonic diagnostic apparatus includes an image creating unit (15) configured to create an image (26a) of an affected area (26) and an image (22a) of a puncture needle (22) inserted into a subject (P) by means of an ultrasonic scanning operation, and a monitor (4) configured to display the image (26a) of the affected area (26) and the image (22a) of the puncture needle (22) created by the image creating unit (15), wherein the image creating unit (15) displays a tissue expected to be extracted from the affected area (26) as an image on the monitor (4) before the puncture needle (22) is inserted into the affected area (26).

The invention discloses a mounting structure of a grid-method mixed sampling device for outlet flue gas of a denitrification device. The mounting structure comprises a denitrification device outlet flue and an air pre-heater outlet flue, and further comprises multi-point sampling pipes, a variable-section collection pipe, a sampling main pipe and a sampling cavity; two or more than two multi-pointsampling pipes are arranged and mounted on the section of the denitrification device outlet flue at equal distance; the variable-section collection pipe is mounted in the denitrification device outlet flue; the bottoms of the multi-point sampling pipes are communicated with the variable-section collection pipe; one end of the sampling main pipe is communicated with the variable-section collectionpipe and the other end of the sampling main pipe is communicated with the air pre-heater outlet flue; and the sampling cavity is arranged on the sampling main pipe. The mounting structure is especially applicable to mixed sampling and measurement of NOx and / or ammonia escaping concentration of a denitrification device outlet; a sampling manner meets the recommended standards of China; a collectedflue gas sample can rapidly and automatically enter a measurement instrument by utilizing the pressure difference of the denitrification device outlet flue and the air pre-heater outlet flue; and themounting structure has good measurement timeliness, is stable and reliable in sampling and has the remarkable advantages of low cost, less maintenance working amount and the like.

The invention provides a message sampling method, a message sampling device, and message processing equipment, and relates to the technical field of data transmission. The method is applied to the message processing equipment, and comprises the steps of classifying received data messages; and separately sampling the different types of data messages according to a sampling interval to acquire different types of data message samples. By using the message sampling method and device and message processing equipment, the different types of data messages can be reliably sampled.

The invention provides an alternating voltage sampling circuit which can conduct sampling on alternating voltages. The alternating voltage sampling circuit comprises an alternating power circuit L, an alternating power circuit N, and at least one voltage comparator which is connected with the alternating power circuit L and the alternating power circuit N. Sampling resistors are further connected between the alternating power circuit L and one voltage comparator, and between the alternating power circuit N and another voltage comparator, and the sampling resistors are glass glaze thick-film resistors which can resist alternating voltage impact. The alternating voltage sampling circuit has the advantages that due to the fact that the glass glaze thick-film resistors which can resist alternating voltage impact are arranged in the alternating voltage sampling circuit, the alternating voltage sampling circuit can conduct low voltage sampling, and in high alternating voltages, can also conduct sampling on the high alternating voltages stably and reliably, provides more accurate data, and further guarantees that the other components in the circuit can run more stably and reliably.

The invention is suitable to be used in the field of data sampling and transmission, and provides a method and a device for self-adaptive sampling of multipath serial data, and an electronic device. The method comprises: in processes of normally receiving multipath serial data and sampling according to a work sampling clock, aimed at each path of serial data, respectively obtaining serial data asdetection data of each path of serial data; generating a plurality of detection data sampling clocks which sample aimed at the detection data of each path of serial data in sequence; according to theplurality of detection data sampling clocks, respectively sampling detection data of each path of serial data, the detection data being obtained at present, to obtain a sampling result; analyzing thesampling result to obtain an optimal detection data sampling clock of all paths of serial data; adjusting an operating sampling clock which samples aimed at all paths of serial data to a clock which is equal to the optimal detection data sampling clock; and sampling multipath serial data according to the adjusted operating sampling clock. In the method, normal work does not need to be interrupted,clock processing is simple, and the method and the device can accurately and reliably sample multipath serial data, to recovery data flow.

The invention provides an intelligent moulded case circuit breaker in allusion to the defect of the current moulded case circuit breaker. The intelligent moulded case circuit breaker is mainly composed of a controller module, a collecting module, a power module and a tripping module. The technical solution used for solving the technical problems comprises the steps: sensing a three-phase power supply circuit through a current transformer by the power module, and connecting a control circuit to control a capacitor to periodically charge / discharge after obtaining the induced current, and obtaining the output voltage; controlling the sampling frequency of the collecting module for the grid signal through the control circuit by the controller module; according to the collected grid data, outputting the logic level signal by the controller module, and controlling the action of the tripping module; and supplying the power to the tripping module and the controller module by the power module. The subsection sampling technology used by the intelligent moulded case circuit breaker is capable of accurately measuring the large signal and small signal at the same time, and improving the sampling precision. The current sampling loop uses the full-wave rectification, and the current generated by the transformer can supply the power to the communication module.

The invention provides a water body sampling unit weight detection method in immersed tunnel pipeline section drift floating immersion, which includes the following steps: step 1, confirming a sampling point and sampling depth; step 2, sampling a water sample through a card cover type water sampler as per the sampling point and the sampling depth confirmed in step 1, and step 3, adopting the Archimedes principle in a laboratory and calculating the water sample unit weight through the method as per the variation of weight of a standardized block in air and the water sample. The method provided by the invention meets the requirement of immersed tunnel construction, is a sampling method for one-step sampling water sample at different depths and at assigned positions based on the fact that little disturbance to the water body is guaranteed, and is a method for measuring the water sample unit weight; the system provides data direct at requirements of different working conditions to support the calculation and control of buoyancy in the construction, improves the construction efficiency, and reduces the engineering risk; and the system and the device are simple, fast and convenient in operation, and are high in accuracy.

The invention provides an intelligent 3D model modeling and holographic display system for artistic design, comprising a collection device, a display device, a detection device, an induction device, a processing device, a protection device and a processor, and the collection device collects data on items; The display device displays the items based on the data of the collection device; the detection device detects the operator's action and the direction of the hand shape; the induction device collects data from the displayed model; the processing device detects the data of the collection device, the detection device and the induction device The adjusting device adjusts the sampling angle of the sampling device; the protective device protects the stored items. The present invention uses the restriction mechanism to limit the display range of the display mechanism, so that the operator's toggle action can be collected, and responds to the real-time rotation of the model, increasing the viewing pleasure, and at the same time taking into account the operator True touch with the model.

The invention discloses a generator power transmitting system and method. The system comprises a power transmitting device, a generator terminal protection-level current transformer TA, a generator terminal measuring-level current transformer and a generator terminal voltage transformer TV. The power transmitting device collects generator terminal three-phase voltages, generator terminal protection-level TA three-phase currents and generator terminal measuring-level TA three-phase currents through the voltage transformer and the current transformer. The fundamental wave effective values of positive sequence voltages, the positive sequence currents of the generator terminal protection-level TA, the positive sequence currents of the generator terminal measuring-level TA and the three-phase currents of the protection-level TA are calculated. When the fundamental wave effective value of the three-phase currents of the protection-level TA is larger than a switching threshold value Iset, power calculation currents are extracted from the protection-level TA, otherwise the power calculation currents are extracted from the measuring-level TA, and a power value is calculated through the positive sequence voltages and the power calculation positive sequence currents. According to the generator power transmitting system and method, generator power abnormal large fluctuation caused by incorrect action of a generator power automatic adjusting system during the system failure can be avoided.

The invention relates to an islanding detection circuit and detection control method for a microgrid power generation system. The detection circuit comprises a sampling circuit for sampling from a main power grid; the sampling circuit enables the sampling signal to pass through an isolating circuit, a filter circuit, a waveform conversion circuit and a photocoupling isolating circuit and then inputs the sampling signal to a DSP processor; after the sampling signal is processed by the DSP processor, a PWM signal is sent out from a PWM driver to drive an IGBT inverter; and the microgrid power generation equipment passes through the IGBT inverter, the filter circuit and a circuit breaker and then is connected to the main power grid. The invention relates to the islanding detection circuit and detection control method for the microgrid power generation system, and the islanding state can be detected in time and can be controlled.

The invention provides a frequency converter three-resistance current sampling method based on current prediction. In each PWM (Pulse-Width Modulation) period, current closed loop PID (Proportion Integration Differentiation) control and SVGEN modulation are performed, and PWM comparison values T<1>, T<2> and T<3> of three phases A, B and C are obtained; the sizes of the T<1>, the T<2> and the T<3> and the shortest time T<min> required by complete sampling are compared in real time; and different current obtaining modes are used according to different size relationships. The method provided by the invention solves the problem that the three-phase current cannot be accurately sampled due to zero-voltage vector duration insufficiency at a high modulation ratio of the conventional three-resistance sampling technology of a three-phase frequency converter. The wide region current closed loop control under the three-resistance sampling can be realized; the modulation ratio is improved; the motor load capability is improved; the cost is low; and the sampling is simple and reliable.

The invention discloses a fault protection device for monitoring the working condition of an ignition device of an engine, and aims at providing the fault protection device capable of effectively eliminating the interference of working circuits of the ignition device. The technical scheme of the fault protection device is as follows: in a data processing comparison control circuit, a sampling module is in series connection with a signal processing module and a data processing control module in proper sequence; the data processing control module is electrically connected to a display module and is electrically connected to a primary power supply end of the ignition device by a fault protection module; the sampling module performs signal sampling from a sampling interface of the ignition device; the signal processing module is used for carrying out compensation filtering on sampled signals and for feeding read current peak values into the data processing control module; and the data processing control module is used for carrying out data comparison, analysis and judgment on sampling frequency and / or the current peak values, for giving out a fault warning signal instruction to the display module, and meanwhile for controlling the fault protection module to disconnect a primary power supply of the ignition device, so that the device enters a fault locking state, and a starting switch loses efficacy.