3results about How to "Simple and reliable measurement method" patented technology

The application provides a device and method for hydraulic pressure measurement while drilling, and belongs to the technical field of drilling water gushing pressure measurement. The device comprises an inlet and outlet port allowing fluid to enter and exit, a flow test chamber connected with the inlet and outlet port, a sealing measurement unit for sealing the inlet and outlet port and measuring the drilling water gushing pressure, a packer for closing the drilling, a hydraulic control unit for controlling the packer to close or open the drilling, a piston and a pushing ring. The application can measure the drilling water gushing pressure and fluid flow at different positions in real time by controlling the closing or opening of the drilling in real time, and the redundant actions of pulling out the drill and replacing the drill collar are omitted, so that the work efficiency is greatly improved.

The utility model belongs to the technical field of sensing measurement, and discloses a differential angle sensor with a variable area type capacitor structure, which comprises two polar plates which are arranged in parallel at an interval, one polar plate is a fixed plate, the other polar plate is a movable plate, the fixed plate comprises a fixed plate electrode I and a fixed plate electrode II, and the movable plate comprises a movable plate electrode; the rotor plate electrode and the stator plate electrode I form a capacitor C1, and the rotor plate electrode and the stator plate electrode II form a capacitor C2; the fixed plate is fixed, the movable plate rotates to form capacitance value changes of the capacitor C1 and the capacitor C2, and measurement of the rotation angle of the movable plate is completed according to the corresponding relation between the capacitance value changes and the angle changes. The sensor is strong in anti-interference capability, high in precision, simple and reliable in structure and low in cost, the sensitivity of the sensor can be improved by improving the excitation signal frequency, and the performance of the sensor is ensured by utilizing an external automatic gain control circuit.

The utility model discloses a device for measuring the grinding precision of die steel, which relates to the technical field of safety measuring instruments and comprises a top plate and a bottom plate, a plurality of guide rods are fixedly connected between the top plate and the bottom plate, a clamping seat is arranged above the bottom plate, the guide rods penetrate through the clamping seat and are in sliding connection with the clamping seat, and the guide rods are arranged on the bottom plate. A height adjusting piece is installed between the bottom plate and the bottom of the clamping base, a dial indicator support is arranged below the top plate and fixedly installed on the guide rod, and a dial indicator is fixedly installed at the bottom of the dial indicator support and located above the clamping base. The flatness and the coaxiality can be measured, and the measurement mode is simple and reliable.