39results about How to "Avoid retrofitting" patented technology

The invention relates to the field of vehicle engineering and electrical equipment, and discloses an energy-saving type starter control system with a self-protection function. The energy-saving type starter control system with the self-protection function comprises a compound relay, a starting unit, a reset unit and a self-protection unit; the compound relay, the starting unit and the reset unit are in electrical connection, and the self-protection unit balances the starting unit and the reset unit through magnetic force. According to the technical scheme, a permanent magnet is adopted to replace an original holding coil to improve the technical scheme, the design that neutral points of an engine is matched with a return coil control device in a voltage matching mode is utilized, the energy consumption problem, in the prior art, of the holding coil is solved, a gear reducer device can be prevented from being additionally installed or the rated power and the boundary dimension of a starter can be prevented from being reduced, and the cost of the starter and a vehicle is saved; meanwhile, the system has the self-protection function and the function of preventing secondary starting and igniting caused by misoperation, and the service life of equipment such as the starter, a storage battery and flywheels is prolonged.

The invention relates to a steering wheel hand-off detection method, which is characterized in that it comprises: acquiring a hand torque signal; performing windowing processing on the hand torque signal to obtain a set of window data; performing frequency domain analysis on the window data and Calculate the low-frequency signal energy and value; perform time-domain analysis on the window data and calculate the signal mean square error and signal extreme value difference; judge whether the driver is interested in the steering wheel according to the low-frequency signal energy and value, signal mean square error and signal extreme value difference In the hands-off state, if it is, the lane keeping assist driving function will be suppressed. Through the combination of time domain analysis and frequency domain analysis, this method can directly analyze the hand torque signal provided by the electro-hydraulic steering gear, which not only saves the cost, but also improves the accuracy of the judgment results of the steering wheel's hand-off and in-hand status .

The present disclosure relates to the field of computer technology, and provides an external parameter calibration method, device, storage medium, and calibration system of a detection system. The straight line equation of the line in the imaging plane of the camera; obtain the target coordinate information of the intersection point in the imaging plane according to the coordinate information of the intersection point in the first coordinate system, wherein the first coordinate system is the A coordinate system corresponding to the single-line laser radar; an error equation is determined according to the target coordinate information and the linear equation, and external parameters between the single-line laser radar and the camera are obtained according to the error equation. On the one hand, the present disclosure can avoid adding specific markers on the calibration plate, which improves the marking efficiency; on the other hand, it can avoid adding filters to the camera, preventing uneven filters from changing internal parameters of the camera and making calibration results inaccurate.

The invention provides a vehicle ramp slope identification method and device. The method comprises the steps: obtaining the average wheel speed of front wheels, the average wheel speed of rear wheels,the engine torque change rate, the brake master cylinder pressure and the longitudinal acceleration measured by an inertial acceleration sensor of a vehicle; performing filtering differential processing on the average wheel speed of the rear wheel and the average wheel speed of the front wheels to obtain a rear wheel acceleration filtering value and a front wheel acceleration filtering value; filtering the longitudinal acceleration measured by the inertial acceleration sensor to obtain an inertial longitudinal acceleration filtering value; and determining the slope angle of the vehicle on a ramp according to the difference between the rear wheel acceleration filtering value and the front wheel acceleration filtering value, the engine torque change rate, the brake master cylinder pressureand the difference between the rear wheel acceleration filtering value and the inertia longitudinal acceleration filtering value. According to the identification method, the ramp is identified by adopting the existing sensor of the vehicle, so that the control of the vehicle can be corrected, the cost can be saved, and the accuracy of the obtained ramp slope can be effectively ensured to be higher.

The invention discloses a digital servo control system, which includes a parameter monitoring unit, a servo execution unit, a display and an IO device all connected to a servo data calculation unit, wherein the parameter monitoring unit monitors the parameters required by the servo control system and transmits the data to The servo data operation unit outputs control signals to the servo execution unit through internal specific control algorithm and control strategy operation analysis, and the display and IO devices display system data and operating system instructions respectively. Compared with the prior art, the present invention can not only accurately track, but also adjust the state of the array; while tracking, it can perform cluster optimization control on the entire array to make it work in the best state.

The invention relates to a full-automatic electric shock prevention pole climbing device for power engineering maintenance. The full-automatic electric shock prevention pole climbing device for powerengineering maintenance includes a climbing machine body, a supporting frame, a supporting machine body and an electric shock prevention seat; the supporting frame is fixedly connected to the middle of the left end of the climbing machine body; the supporting frame is arc-shaped; the supporting machine body is fixedly connected to the tail end of the other end of the supporting frame; front and rear symmetrical fixed guide posts are fixedly connected to the top of the supporting machine body; the electric shock prevention seat is sleeved on each fixed guide post; a damping spring surrounding each fixed guide post is arranged on the top of the supporting machine body; the right end of the climbing machine body is cut with first sliding grooves which are symmetrical up and down; each first sliding groove is provided with a power direction conversion groove near the center end of the climbing machine body; and a power direction conversion device is arranged in the power direction conversion groove.

The invention relates to a boiling heat exchange cooling device for a hydrodynamic retarder. The boiling heat exchange cooling device for the hydrodynamic retarder comprises a water tank, a condenser and an interlayer, wherein the interlayer is arranged on the outer wall of a fixed pulley of the hydrodynamic retarder; an oil flow channel and a spiral cooling flow channel are formed in the interlayer; an inlet of the cooling flow channel is connected with an outlet of the water tank through a water pump; an outlet of the cooling flow channel is connected with an inlet of the condenser; an outlet of the condenser is connected with an inlet of the water tank; the water pump is controlled by a water pump motor; the oil flow channel comprises an oil inlet pipeline and an oil outlet pipeline; an inlet of the oil inlet pipeline is connected with oil outlets of both the water pump motor and a fan motor; an outlet of the oil inlet pipeline is connected with an oil inlet of a working chamber of the hydrodynamic retarder; an outlet of the oil outlet pipeline is connected with oil inlets of both the water pump motor and the fan motor; an inlet of the oil outlet pipeline is connected with an oil outlet of the working chamber of the hydrodynamic retarder; and the fan motor controls a cooling fan to work. The boiling heat exchange cooling device for the hydrodynamic retarder has a good cooling effect and can prevent leakage of transmission liquid.

The invention discloses a method and device for determining a position error of a synthetic aperture radar (SAR) carrier aircraft. The method includes the steps that at least two ground target points are selected according to radar return data; the range migration (RCM) track of each ground target point is detected; the position error of the SAR carrier aircraft is obtained through calculation according to each detected RCM track. The position error of the SAR carrier aircraft can be determined without the additional installation of a guided system, so that cost is saved.

The invention provides a noise assessment and noise optimization method and device for an electric reactor. The noise assessment method for the electric reactor comprises the steps that basic parameter information of each coil in a to-be-measured electric reactor is acquired; according to the basic parameter information, the maximum displacement of each coil is calculated respectively; according to the maximum displacement and the basic parameter information, an effective value of the vibration velocity of each coil is calculated; according to the effective value of the vibration velocity of each coil, the noise level of the to-be-measured electric reactor is evaluated. The noise assessment and noise optimization method and device for the electric reactor have the advantages that the problem that the noise cannot be evaluated in the early design phase of the electric reactor, the assessment method is simple and effective, a basis is provided for performing noise optimization on the electric reactor subsequently, and the noise assessment and noise optimization method and device have guiding significance for noise reduction design of a smoothing reactor.