8results about How to "Flexible testing" patented technology

The wireless test method for the MEMS sensor comprises the following steps: pre-processing voltage data by a mobile terminal, and calculating the sensitivity of the currently tested sensor: pre-processing the sensor data: performing moving average filtering processing on the sensor data, determining a voltage reference value, and calculating the sensitivity of the currently tested sensor; in the process of testing the sensitivity of the sensor, when the sensor is subjected to external excitation, the output voltage of the sensor changes, the variable quantity of the voltage of the sensor relative to the reference value is calculated, and the ratio of the variable quantity to the reference value is calculated as the sensitivity of the sensor; presetting a maximum threshold value and a minimum threshold value of the sensitivity; if the sensitivity of the sensor is between the sensitivity minimum threshold value and the sensitivity maximum threshold value, the sensitivity of the sensor meets the requirement, and if the sensitivity of the sensor is not between the sensitivity minimum threshold value and the sensitivity maximum threshold value, the sensitivity of the sensor does not meet the requirement; and displaying the sensitivity data of the sensor meeting the threshold requirement.

The utility model relates to the technical field of semiconductor detection, and discloses a test probe capable of preventing probe head deformation, which comprises a test probe rod and a test probe head, the test probe head is arranged on the left side of the test probe rod, a protective sleeve is arranged outside the test probe head, the front end and the rear end of the test probe head are fixedly connected with first magnetic strips, and the first magnetic strips are arranged on the protective sleeve. The bottom end of the protective sleeve is fixedly connected with a first buffer ring, the top end of the protective sleeve is fixedly connected with a second buffer ring, and the front end and the rear end of the interior of the protective sleeve are fixedly connected with second magnetic strips. According to the test probe capable of preventing the probe head from deformation, the test probe head can be protected through the protective sleeve, the first buffer ring and the second buffer ring on the protective sleeve have buffer and protection effects when the test probe is subjected to external force, the test probe head can be prevented from deformation, and the test probe head can be prevented from deformation only by pushing the protective sleeve downwards during use. And the second magnetic strip on the protective sleeve can be taken down after being separated from the first magnetic strip, so that the problem that the needle head is easy to deform is solved.

The invention belongs to the technical field of fuel cells, and particularly relates to a fuel cell flow velocity field on-line test device and method, and the device comprises a separation plate and a flow velocity measurement plate which are arranged in a stacked manner. Flow velocity sensors are assembled on the upper surface of the flow velocity measuring plate in an array mode. A signal channel and a current channel are formed in the flow velocity measuring plate, and the signal channel is formed in the position of the flow velocity sensor; the lower surface of the flow velocity measuring plate is provided with a cooling water flow field. A mounting hole for penetrating through the flow velocity sensor and an air hole are formed in the partition plate; the upper surface of the partition plate is provided with a cathode gas flow field; the device is provided in place of a bipolar plate in a fuel cell. Compared with the prior art, the problems that in the prior art, a test structure is complex, and a test result highly depends on the precision of a calculation model are solved. According to the scheme, on-line measurement of flow velocity field distribution in the fuel cell is achieved, the device can replace a bipolar plate to be assembled at any cell, and testing is flexible.

The utility model discloses a transistor characteristic frequency test experiment device, which relates to the field of transistor characteristic frequency test experiments and comprises a first input module, a test module, a liquid crystal display module, a first measurement module, a second input module and a second measurement module. The test module is electrically connected with the first input module, the second input module, the liquid crystal display module, the first measurement module and the second measurement module. According to the transistor characteristic frequency test experimental device, the high-precision digital source meter is adopted to realize direct test of the transistor characteristic frequency and indirect test of the transistor characteristic frequency through gain bandwidth product, the high-precision digital source meter can be adopted for measurement, the output signal is stable and accurate, and the test efficiency is high. Errors generated in the testing process can be automatically calibrated, compensated and corrected, it is ensured that the accuracy and reliability of a testing result are not prone to being affected by environmental factors, and the reliability of the testing result is improved.

The application provides a method for quickly testing the free falling section height of slurry in a filling vertical pipe, a plurality of sensors are arranged at specific positions of the filling pipe, a test ball with a signal transmitter arranged inside and the same density as the slurry is made to freely fall from a discharge port along with the slurry, the time when the test ball passes through each sensor is recorded, and finally the free falling section height of the slurry in the filling vertical pipe is calculated according to the test result and known conditions. The test ball with the same density as the slurry is made to move into the filling vertical pipe at the same time as the slurry, the arrangement positions of the sensors are matched, and the free falling section height of the slurry in the filling vertical pipe is accurately and ingeniously calculated by using the test result, the position of the section of the vertical pipe which is easy to be damaged during filling in different areas is found out, data support for optimizing the pipe network design is provided, the operation and running safety of the filling vertical pipe is ensured, the service life of the filling vertical pipe is prolonged, and the application can be popularized and applied on a large scale in the fields of wear detection of mine filling vertical pipes and optimal design of filling pipe networks.

The invention relates to the technical field of power system automation, and discloses a transformer substation remote automatic joint debugging acceptance method, system and device and a medium, and the method comprises the steps: generating an exclusive check parameter template of a to-be-joint-debugged transformer substation through a machine learning model; configuration analysis is carried out on configuration carriers of the main station and the to-be-joint-debugged transformer substation to obtain related three-remote configuration information, and static checking is carried out on the related three-remote configuration information through an exclusive checking parameter template to eliminate error information; the method comprises the following steps of: matching a dual-confirmation signal from a to-be-joint-debugged transformer substation from a remote control signal of a main station in checked three-remote configuration information by utilizing an exclusive checking parameter template, generating an association mapping table, and constructing a remote virtual communication environment between the main station and the to-be-joint-debugged transformer substation through a network virtualization technology; therefore, automatic joint debugging acceptance of the main station and the to-be-joint-debugged transformer substation is carried out on the obtained simulation communication link, so that the core problems of poor adaptability, high risk, low efficiency, checking strategy solidification and the like in the prior art are solved.

The utility model discloses drive assembly and mobile carrier. Drive assembly includes installation support, driver, wheel and elastic part. Installation support is equipped with two vertical board, and driver is located between and is connected with rotation, and the central axis is parallel with the rotation axis and does not coincide. Wheel is directly connected driver, and elastic part connects installation support and driver. When wheel is increased under pressure, driver positive overturn makes wheel go up, and elastic part stores energy, and when pressure is reduced, elastic part releases energy, and driver reverse overturn makes wheel go down. The transmission mechanism is saved, and the structure is simplified, and cost is reduced, and energy consumption is reduced. Cooperation elastic part realizes bearing, and anti-rolling pressure retraction and reset. Mobile carrier includes the casing and at least three above-mentioned drive assemblies, and the lower part of casing is equipped with the accommodation cavity. Drive assembly is not arranged along the straight line, and is supported stably. When rolling, wheel retracts to the chamber, and the bottom surface of casing is attached to the ground and bears pressure, avoiding the damage of core components, and after rolling, elastic part resets, and wheel jacks up the casing, ensuring normal driving.

The embodiment of the application belongs to the technical field of wireless communication, and discloses a distributed antenna off-site calibration method and equipment. The distributed antenna off-site calibration method comprises the following steps: a signal source transmits a calibration signal to a drone provided with a corner reflector; a plurality of receivers receive echo signals transmitted by the drone; wherein the receivers are provided with antennas, and the echo signals are generated by the drone according to the calibration signal; the antennas are calibrated according to the echo signals and reference signals; wherein the reference signals are determined by the calibration signal and transmitted to the antennas by the signal source. The application provides a calibration method for distributed antennas without a dedicated test tower or test field.