4results about How to "Avoid working at the same time" patented technology

The application discloses a multi-sensor cross prompting target tracking method and device, obtains working state information of all sensors, obtains a first number of sensors in a working state; compares the first number with a sensor working number threshold value, selects a sensor group according to a comparison result; obtains target detection information output by each sensor in the sensor group; fuses all target detection information to obtain target fused detection information; determines final target state information according to the target fused detection information; the application can coordinate and manage multiple sensors, avoids all sensors working at the same time, and can realize fast and accurate tracking of a target, improves working efficiency of the sensors; meanwhile, a weighted fusion method is adopted to fuse target detection information of the sensor group, more accurate final target state information is obtained, and the system has better target tracking performance.

This invention discloses a self-powered, self-calibrating current measurement device, system, and method. The device includes a power extraction and measurement coil, a magnetoresistive sensor array, a first current sampling circuit, a second current sampling circuit, a protection circuit, a power extraction circuit, a battery and power management circuit, and a control circuit. The power extraction and measurement coil is used to obtain electrical energy and measurement signals from the measured conductor. The protection circuit is connected to the power extraction and measurement coil. The power extraction circuit is connected to the power extraction and measurement coil. The first current sampling circuit is connected to the power extraction and measurement coil. The second current sampling circuit is connected to the magnetoresistive sensor array. The control circuit is connected to each circuit and is used to control the switching of the operating mode of the power extraction and measurement coil, and to perform calculations and calibration based on the measurement signals from the two sampling circuits. This application realizes the online self-calibration function of a wideband magnetoresistive sensor array, and provides a low-cost, high dynamic range, high bandwidth, low power consumption, and small size high-reliability current monitoring scheme for power distribution networks with self-powered operation.

The invention discloses a rocker arm, a valve mechanism and an engine. The rocker arm comprises a rocker arm body, a brake part, a hydraulic gap adjusting device and a control slide valve. A first hydraulic channel, a second hydraulic channel and a mounting cavity are defined by the rocker arm body, and the first hydraulic channel and the second hydraulic channel both communicate with the mounting cavity. The brake component is movably arranged on the rocker arm main body and is connected with the first hydraulic channel; the hydraulic gap adjusting device is arranged on the rocker arm body and connected with the second hydraulic channel. The control slide valve is movably arranged in the mounting cavity and is provided with a first position and a second position relative to the mounting cavity, the control slide valve at the first position is communicated with the first hydraulic channel and disconnects the second hydraulic channel, and the control slide valve at the second position is communicated with the second hydraulic channel and disconnects the first hydraulic channel. According to the rocker arm, excessive adjustment of the hydraulic gap adjusting mechanism can be avoided under the abnormal control condition.

The application discloses a kind of smart wearable device wearing detection method, control device and smart wearable device, it is related to smart wearable device technical field, wherein, smart wearable device wearing detection method is verified by successively executing wearing posture, temperature verification, human bioelectricity verification and photoelectric signal verification, and four levels are formed in series verification link, only four verification passes through all to determine normal wearing state, can effectively exclude the situation of single sensor misjudgment, improve the accuracy of wearing detection;Meanwhile, by setting up posture sensor, temperature sensor, electrical sensor and optical sensor four different types of sensors, detect from equipment posture, body temperature, human bioelectricity and blood flow signal four different physical dimensions respectively;The technical scheme provided by the application can solve the problem that the existing smart wearable device is caused by relying on single PPG sensor and the wearing detection misjudgment rate is high.