48results about How to "Less calibration work" patented technology

An auto-ignition timing control and calibration method for use in an internal combustion engine having more than one ignition modes including the mode of compression ignition of a premixed fuel/air mixture (CAI/HCCI), wherein when the engine is operating in the CAI/HCCI mode, in order to determine a prescribed setting or combination of settings of engine operating parameters necessary to achieve a target auto-ignition timing according to a predetermined auto-ignition timing map, the associated compression temperature trajectory of the cylinder charge with time, calculated in dependence on the initial and boundary conditions of the said charge subjected to the said prescribed setting or combination of settings of the said engine operating parameters, and further in dependence on the interim heat exchange processes affecting the said charge, is used for testing and verifying that the said trajectory reaches a target temperature at a target reference timing relative to TDC of the engine, and wherein the said target temperature and timing are predetermined by calibration.

The invention provides equipment and a method for controlling rail pressure of a high-pressure rail-shared pipe cavity for an engine high-pressure rail-shared fuel system. The equipment comprises a working condition acquiring device, an equivalent cross sectional area determining device of a fuel gauging valve and a signal generating device, wherein the working condition acquiring device is used for acquiring working conditions relevant to the engine high-pressure rail-shared fuel system; the equivalent cross sectional area determining device of the fuel gauging valve is coupled to the working condition acquiring device and used for determining the equivalent cross sectional area of the fuel gauging valve by using a linear physical model according to the acquired working conditions and the rail pressure target value of the high-pressure rail-shared pipe cavity; and the signal generating device is coupled to the equivalent cross sectional area determining device of the fuel gauging valve and used for generating driving signals for controlling the equivalent cross sectional area of the fuel gauging valve according to the determined equivalent cross sectional area of the fuel gauging valve.

In a method for controlling a proportional solenoid valve in a hydraulic system, a model of the hydraulic system is formed, control cycles are predefined, and an estimate is made of the pressure prevailing in the hydraulic system at the end of the control cycle and of the coil current applied to the coil of the solenoid valve based on the variables prevailing at the start of the control cycle, the physical parameters of components of the hydraulic system, and the temperature of the hydraulic fluid.

The marine integrated optical fiber gyro strapdown vertical reference system adopts an integrated design, all of which are installed in one shell, including the optical fiber gyroscope inertial group, I/F conversion circuit, pulse counting interface circuit, secondary power supply AC/DC circuit, digital interface circuit 1. The integrated information processor CPU collects the original data of three fiber optic gyroscopes, three accelerometer outputs and temperature sensors via the digital interface circuit and the pulse counting interface circuit, uses the pre-established error model to perform error compensation, and then performs inertial navigation Calculation, on the basis of navigation calculation, establish the state equation of the system, and perform kalman filter according to the auxiliary velocity information input from the outside world, obtain the attitude error through filtering and complete the correction of pure inertia, so as to obtain high-precision attitude information output . The invention realizes the full digital output interface, has the advantages of compact structure, long service life, high reliability, good environmental adaptability and low power consumption, and can be applied to ship-borne weapons, vehicle-mounted weapon systems and the like.

The invention provides an intelligent electronic control air suspension system for a commercial vehicle. The intelligent electronic control air suspension system is composed of an integrated ECU, an air compressor, a three-in-one sensor, a rigidity-variable air spring, an air supply pipeline, a wiring harness, a key, an air storage tank, a pressure sensor and the like. The height, air pressure andtemperature of the air bag are monitored in real time through the three-in-one sensor. By comparing the height of the air bag with the storage height in the system and combining the current vehicle state and road conditions, inflation and deflation of the air bag are controlled to achieve adjustment of various vehicle body heights. Rigidity adjustment of the air bag is achieved through on-off ofa built-in electromagnetic valve of the air bag, the phenomena of side tilting and nodding during turning and braking are avoided, and both vehicle driving comfort and control stability are achieved.The axle load of the vehicle is accurately calculated through the air pressure value of the air bag, overload alarm is conducted, and the overload problem of the commercial vehicle is better avoided.The temperature of the air bag is monitored in real time, the health degree of the air bag is simulated, and intelligent service is provided for the air suspension.

A rotary rotor device is arranged in the rotor shell of an open end spinning machine. An enclosing cover component used for enclosing the rotor shell is preinstalled, wherein a channel joint can be loaded. At least one blocking element is preinstalled to prevent the open end spinning machine starting operation. A blocking element can be preinstalled to prevent from unloading the channel joint when the rotor device is in operation. In addition, another blocking element can be preinstalled to avoid and close the enclosing cover component when the channel joint is not installed. A fixed device including at least one blocking element can be installed for the changeable channel joint in the enclosing cover component. The channel joint had better include a bushing for the use of yarn take-off nozzle and a bushing used for rotation keeping part and the exterior profile a circular outer contour with two diametrically opposite projections.

The invention belongs to the field of computer vision and particularly relates to a computer vision algorithm capable of performing the target tracking, location and camera marking at the same time. The invention provides a camera marking method, or a target tracking and locating method, applied to an active three-dimensional vision system of a lacertilian-imitating chamaeleonidae suborder biological vision system structure. The coordinate extracting algorithm is mainly characterized in the camera marking; the tracking and location of an interested target are carried out synchronously; the marking process of the camera does not need the continuous motionlessness of the interested target and also does not need the execution before the target tracking and location. The continuous marking process of the adopted marking method is a discrete process; by using the target to perform the camera marking on the static state in the operation process of the vision algorithm, the requirement of the camera marking is reduced, the synchronous execution of the vision algorithm and the marking process is achieved. For the property of self-marking, the manual marking work is reduced, and the preparatory work of the algorithm is largely simplified.

The invention discloses a plant protection unmanned aerial vehicle with detachable levelness-calibration-free vehicle arms. The plant protection unmanned aerial vehicle comprises a power distributionplate, a vehicle body assembly, foot stools, a rear section assembly, a battery compartment, vehicle arm assemblies, a power component, a water tank, a spray component and a circuit assembly appearance shell; the outer surface of the vehicle body assembly is provided with the four vehicle arm assemblies, and the four vehicle arm assemblies are annularly and uniformly arranged on the outer surfaceof the vehicle body assembly. Some positioning parts are used on the plant protection unmanned aerial vehicle, the calibration work of disassembled vehicle arms is reduced when the unmanned aerial vehicle is assembled, the transport volume of the unmanned aerial vehicle is reduced, meanwhile, up and down symmetry is achieved, the complexity of the assembly process is simplified, an assembler is easy to get started, and work efficiency is greatly improved; a center plate is common to a front plate, side plates, a rear plate, carbon tube root connecting pieces, a center upper plate and a centerlower plate to jointly form a stable shell structure, the structure is simple, and the strength and stability of an entire center plate frame can be increased.

The invention provides a temperature control method for a fuel cell in a fuel cell vehicle. The temperature control method comprises the steps that: a steady-state power temperature compensation duty ratio of the fuel cell is obtained through measurement and calculation by a whole vehicle controller; then, the whole vehicle controller multiplies the steady-state power temperature compensation duty ratio of the fuel cell by the sum of an environment temperature compensation duty ratio and 1, so as to obtain a fan duty ratio corresponding to the cooling power of a heat dissipation system, and the fan controller controls a fan rotating speed according to the fan duty ratio corresponding to the cooling power of the heat dissipation system; afterwards, the whole vehicle control unit selects a dynamic temperature compensation duty ratio of the fuel cell in real time according to an absolute value of the difference between the actual temperature of a water inlet of the fuel cell and the set required temperature of the water inlet of the fuel cell, adds the dynamic temperature compensation duty ratio of the fuel cell and the fan duty ratio corresponding to the cooling power of the heat dissipation system to obtain a fan duty ratio corresponding to the final cooling power of the heat dissipation system, and updates the fan duty ratio to a fan duty ratio corresponding to the cooling power of the heat dissipation system in real time. The temperature control method is simple and feasible, and the temperature of the fuel cell can be rapidly and accurately reduced.

The invention provides a built-in light source brightness detection system. The system comprises an optical imaging system, a built-in light source, a total reflection mirror and a computer software processing module. The optical imaging system comprises an imaging lens, a light filter, a photoelectric detector and a signal processing circuit, the imaging lens, the light filter and the photoelectric detector are arranged along an incident light path sequentially, and the signal processing circuit is used for generating and outputting a video signal. The built-in light source is fixed beside the imaging lens, the total reflection mirror is arranged in front of one side of the imaging lens and used for reflecting parallel beams emergent from the built-in light source into the imaging lens and focusing the parallel beams on the imaging area of the photoelectric detector, the photoelectric detector is fixed on a focal plane of the imaging lens, and a curve of the light filter is used for correcting a spectral response curve of the photoelectric detector. The computer software processing module is used for selecting imaging areas of a target and the built-in light source from an image after the image is acquired, and completes related gray acquisition and numeric calculation so as to calculate a brightness value of a target. The invention further provides a built-in light source brightness detection method utilizing the detection system.

The invention discloses an I-PMS (I-Passenager Movement System)-based accurate-adjustment measuring and remote monitoring system of an I-type track board for a passenger transport line. The I-PMS-based accurate-adjustment measuring and remote monitoring system of the I-type track board comprises a measurement robot, a wireless data transmission unit, four frames, measurement prisms, a PDA (personal digital assistant) micro-computer, eight wireless digital displays, a wireless digital meteorological sensing instrument, and a remote monitor; two frames are in a group and arranged in parallel; a group of frames are arranged on the track board; another groups of frames are arranged on the adjacent track boards; the measurement prisms are arranged at two ends of each frame; the measurement robot is between the adjacent track boards; the wireless data transmission unit is arranged on the measurement robot; the measurement robot and the wireless data transmission unit are connected through a lead, and the wireless data transmission unit is wirelessly connected with the PDA micro-computer, the wireless digital displays, the wireless digital meteorological sensing instrument and the remote controller. Accurate construction and inspection of the track board are full-automatic in the round; the automatic degree of the field operation is high; the construction and inspection speed are improved; a measurement scene is timely adjusted and deployed through a remote control device; the problem is timely solved; dual-wire measurement is achieved; the measurement time is reduced; the measurement efficiency is improved, and the consistency of double wires in a mounting process is ensured.

The invention discloses a radar-assisted camera calibration method based on deep learning, and solves the technical problem of conversion from a radar plot to an image target frame. The method comprises the following steps of: acquiring data to form radar plots and image target frame data; aligning the acquisition time; forming a training input data set by the radar plot data; forming a training output data set by the converted image target frame data; constructing and training a deep neural network model; and obtaining a camera calibration function. According to the method, the deep neural network model containing the cross-layer link is utilized to convert the radar plot data into the image target frame data to form the calibration function, so that the personal error and the additional work in the calibration process are reduced, and the flexibility and efficiency of camera calibration are improved; the calculated amount is small, and the calibration accuracy is high. The method is used for multi-sensor fusion target detection, and more particularly used for camera calibration under the condition that radar and camera cameras conduct target detection at the same time.

The invention discloses an optical path system and a laser radar. The optical path system is used for emitting N synchronous light rays into the rotary polyhedral prism; n scanning lights are formed by rotating the polyhedral prism; the scanning light is reflected by the fixed polyhedral prism to form N parts of vertical scanning light synchronously emitted from the circle center to the outer direction; compared with a single light source, the refreshing rate is improved by N times; when the refresh rate of 1/N is maintained, the scanning duration of each horizontal angle is correspondingly increased; the scanning time in the vertical direction in the horizontal scanning angle is prolonged; improving vertical resolution, laser radar, the device comprises N (at least two) laser transmitters, a optical path system, a horizontal rotating structure and a motor control module, laser emitted by the laser emitter emits N parts of vertical scanning light through the optical path system, the rotating speed can be reduced under the condition that the refresh rate is not changed, the scanning duration of each horizontal angle is increased, and therefore the vertical scanning time in the horizontal scanning angle is prolonged, and the resolution in the vertical direction is improved in a multiple-level mode.

The invention discloses a novel air bridge device with a calibration-free function. The novel air bridge device belongs to the technical field of aircraft power simulation tests, and aims to solve theproblem that the whole-process calibration must be completed again to obtain a disturbing force on a balance when an air bridge is damaged or the relative position of the air bridge and the balance is changed in the test process. The novel air bridge device comprises a first straight pipeline, a second straight pipeline, an L-shaped bent pipe and a third straight pipeline which are sequentially connected end to end, wherein elastic ventilation devices are arranged at joints between the first straight pipeline and the second straight pipeline, between the second straight pipeline and the L-shaped bent pipe and between the L-shaped bent pipe and the third straight pipeline; and the upper end of the first straight pipeline is connected with the measuring end of the balance, the right end ofthe third straight pipeline is connected with the fixed end of the balance, and the axis of the third straight pipeline is perpendicular to the axes of the first straight pipeline and the second straight pipeline. According to the novel air bridge device with the calibration-free function, the disturbing force on the balance can be rapidly obtained under the condition that air bridge overall calibration and balance combined calibration are not carried out.

The invention provides a calculating method and device of a virtual accelerator and a controller and relates to the technical field of vehicle control. The method comprises the steps that torque arbitration is performed, and wheel-end torque values after vehicle arbitration are determined; according to the wheel-end torque values and target reverse push curves of the virtual accelerator, a reversebasic value of the virtual accelerator is determined; the target reverse push curve include, at least, virtual accelerator reverse push curves of two power modes; closed-loop regulation is conductedon the reverse basic value; the reverse basic value undergoing closed-loop regulation and a real accelerator value are arbitrated to obtain a final virtual accelerator value. According to the embodiment, on the premise that enough precision is ensured, an algorithm mode is simplified by combining with a closed-loop control method, code space is saved, and the running efficiency is improved. The intelligent control demand of existing vehicles having diversified driving patterns is better met, the universality and flexibility are better, platform-based operation can be better achieved, and software development cost is reduced.

Embodiments of the present disclosure relate to a virus identification method and apparatus. In at least one embodiment of the present disclosure, preset key content in a to-be-identified file is first extracted, and hash operations are performed on the extracted content. For virus files with the same type, as long as the preset key content is the same, even if there are some difference in the content of other parts, the hash values corresponding to the virus files are the same. Thus, only by setting a virus value corresponding to the hash value can complete the identification of a type of virus files, so that the corresponding calibration work can be reduced.

The invention discloses a reference substance for titration of ammonium salt absorbed in a boric acid solution through a Kjeldahl determination method. The reference substance has the advantages of stable property and large mole quality, the purity can achieve 99.95%, and the reference substance is subjected to a quantification reaction with the ammonium salt absorbed in the boric acid solution. The reference substance is dried at the temperature of 105 DEG C to a constant weight, is directly weighed, and is slightly heated with high pure water for dissolving to prepare 0.01 mol/L of a standard solution, the standard solution is used for titration of the ammonium salt absorbed in the boric acid solution, and the total nitrogen content of a sample is measured. The nitrogen recovery rate ofthe 0.01 mol/L of the standard solution prepared by the reference substance is 98.10-100.28%, the average nitrogen recovery rate is 99.42%, and the coefficient of variation is 0.81%. Compared with general standard acidimetry, a tedious calibration work is omitted, the analysis precision is increased, and the determination result is accurate and reliable.