46results about How to "The measurements are true" patented technology

The invention belongs to the technical field of unconventional natural gas development experiments, and discloses an experimental device for carbon dioxide directional fracturing and permeability testing, including a gas source system, an in-situ environment simulation system and a pulse testing system. The core specimen provides an experimental environment for simulating the real formation temperature and stress state. The gas source system is used to provide the test gas source to the in-situ environment simulation system, as well as the gas source for the fracturing core specimen. The pulse test system is used to Core specimens are pulsed to obtain permeability. It realizes supercritical carbon dioxide directional fracturing shale experiments under simulated formation conditions, and can test the core (axial and radial) permeability before and after fracturing in situ. Compared with traditional experimental methods and experimental equipment, it is more intelligent. , convenient operation, etc., and the in-situ environment simulation system simulates the field working conditions more realistically, so that the measurement results are more real and accurate.

The invention relates to a quasi-steady-state measuring method and testing device for thermal parameters of a cylindrical battery. A cylindrical heater is placed in the hollow part of the mandrel of the cylindrical battery to measure the radial thermal conductivity and specific heat of the cylindrical battery; the cylindrical heating The device includes an insulating column, a heating wire, a hollow steel shell, an insulating tape, and a thermocouple. Wrap the heat insulating material around the battery to be tested, and stick a thermocouple on the outer wall of the cylindrical battery shell and the heat insulating material, place the battery to be tested in a temperature control box for heating, and determine the accuracy according to the temperature rise rate inside and outside the cylindrical battery. In the steady-state stage, the radial thermal conductivity and specific heat of the cylindrical battery are obtained based on the quasi-steady-state principle. The test device used for measuring the thermal conductivity of cylindrical batteries in the present invention has the advantages of simple structure, short measurement time, accurate test results, low cost and easy implementation. It can be used to measure the radial thermal conductivity and specific heat of cylindrical batteries under different working conditions.

The invention relates to an angle measurement method and system, and belongs to the technical field of radar. The method comprises the steps of acquiring a first coordinate of a first preset mark point on telescope of a wind measurement radar and a second coordinate of a second preset mark point adjacent to the first preset mark point; acquiring a third coordinate of a preset mark point on a firstlight barrier plate, wherein the first light barrier plate can be used for shielding light beams emitted from a first lens cone; acquiring a fourth coordinate of a preset mark point on a second lightbarrier plate, wherein the second light barrier plate can be used for shielding light beams emitted from a second lens cone; and determining light giving-out angles of the first lens cone and the second lens cone according to the first coordinate, the second coordinate, the third coordinate and the fourth coordinate. Compared with the prior art, included angles among the light beams emitted fromthe lens cones are measured, the measurement result is true, the measurement accuracy is high, and accurate angle numerical values can be obtained.

A system for measuring the drive power of car is composed of rotation speed sensor, drive shaft's torque measuring unit with infrared emitter, infrared receiver, data processing device, transmission lines and accumulator. Its measuring method features that the torque and rotation speed of drive shaft are simulataneously measured and then used to calculate the drive power of car. Its advantages are less investment in equipment and high correctness.

The invention discloses a commercial vehicle dynamic slope test system and a commercial vehicle dynamic slope test method. The commercial vehicle dynamic slope test system comprises a gyroscope, an atmospheric pressure sensor, a CAN network, an acceleration sensor, an angular acceleration sensor and a processing unit, wherein the processing unit comprises a real-time slope value calculation module, an average slope calculation module and a data fitting module; the gyroscope is electrically connected with the real-time slope value calculation module, the atmospheric pressure sensor is electrically connected with the average slope calculation module, the CAN network is electrically connected with the average slope calculation module, the real-time slope value calculation module, the average slope calculation module, the acceleration sensor and the angular acceleration sensor are respectively connected with the input end of the data fitting module, and the output end of the data fitting module is connected with the CAN network. The processing unit is used for carrying out fitting on the acquired data, and the real-time slope value with high precision, quick response and low nose can be acquired by utilizing a filter method of hardware and software.

The invention relates to a harmonic gear reducer starting torque and friction resistance torque testing system. The harmonic gear reducer starting torque and friction resistance torque testing system includes a loading driving module, a torque and rotation angle measurement module, a control and data processing module and a testing bench. In a starting torque test, the control and data processing module performs starting torque testing according to a rotation angle test mode or a rotation speed test mode, and finds the maximum value of a loaded torque according to torque values in a testing process, and adopts the maximum value of the loaded torque as the starting torque of a test point of a tested harmonic gear reducer (11). In a friction resistance torque test, the control and data processing module performs friction resistance torque testing according to a friction resistance torque test mode, and acquires the minimum value, maximum value and average value of a friction resistance torque in a testing process according to acquired torque values, rotation angle values and time in the testing process. With the harmonic gear reducer starting torque and friction resistance torque testing system of the invention adopted, problems in accurate, fast and automated measurement of starting torques and friction resistance torques of harmonic gear reducers can be solved, and measurement accuracy can be improved.

The invention discloses a coupled external mounted steel stay rope force detection device and a method. The device comprises an excitation assembly and a winding displacement coupling sensor, wherein the excitation assembly comprises a magnetic core, an excitation coil with a capacitive discharge circuit is sheathed on the magnetic core, a first magnetic pole and a second magnetic pole are arranged at two ends of the magnetic core and are respectively provided with a first press plate and a second press plate, the first magnetic pole and the first press plate are detachably connected, the second magnetic pole and the second press plate are detachably connected, a first clamp hole is arranged at a connecting part of the first magnetic pole and the first press plate, a second clamp hole is arranged at a connecting part of the second magnetic pole and the second press plate, and round lining pads are arranged on the inner walls of the first clamping hole and the second clamping hole. The method comprises the following steps that the device is used for detection, and in addition, magnetic feature curves of a steel stay rope to be detected are obtained; the device is used for detection, in addition, a group of standard magnetic feature curves are obtained; and the magnetic feature curves of the steel stay rope to be detected are compared with the group of standard magnetic feature curves to obtain the tension in the steel stay rope to be detected.