SU513249A1 - Tilt angle sensor - Google Patents

Description

(54) TILT ANGLE SENSOR

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The invention relates to the field of cutting technology and can be used in instrument engineering for measuring the angles of inclination of industrial units, special objects, etc.

I An inductive differential-olinoid tilt angle sensor is known, based on a change in coil inductance | due to / change in the magnetic resistance of the circuit. It consists of a non-magnetic hermetically bonded radially bent tube, inside of which a ferromagnetic ball is freely located, serving as a core. On the outer diameter of the tube, two inductance coils are located symmetrically relative to the center. The tube and the coil are connected to the body motionless. When the body is tilted, the ball moves in one direction or another, changing the inductance of the coils included According to the differential circuit in the {AC circuit. Sensors are also known (positions containing a body, a tube with; a sensitive element made of a ferromagnetic material, the source

magnetic field, semiconductor magiv-sensitive element.

The proposed sensor is simpler and more reliable: especially when the sensor is operating in the zone of radioactive radiation and when the ambient temperature changes. This is due to the fact that in the sensor the magnetically sensitive elements, made in the form of jHbJX hermetically activated magnetic contacts, are located on the side of the smallest radius of curvature of the tube symmetrically with respect to the source of the magnetic field established by the ICO of the side of the largest radius. In this case, the controlled contacts on / out are connected to the high voltage terminal of the constant current through the variable resistors according to the differential circuit. A voltage meter indicating the angle of inclination is included in the diagonal of the bridge, formed by magnetically controlled contacts and its temporary resistors. i FIG. 1 shows schematically the angles of inclination, circumvent the view; in fig. 2 Electrical circuit switching magnetic contacts.

Neither the housing 1 is fixedly placed sealed vvdialno curved tube 2 of a nonmagnetic material. Inside the tube 2, a ball 3 of magnetic material is placed loosely. Sealed magnetic contacts (MK) 4 are fixed to housing 1 and are located symmetrically with respect to the permanent magnet 5 on the side of the smallest radius of curvature of the tube 2. A permanent magnet (magnetic field) is located outside the tube 2 along its middle from the side maximum radius of curvature. The magnetically compensated contacts 4 are connected via variable resistors 6 to a high voltage source of direct current 7. A voltage meter 8 with zero in the middle of the cabinet, calibrated in units of the measured slope, is connected to the diagonal of the bridge formed by the contacts 4 and the variable resistor 6.

In the initial state, when the tilt angle of the sensor is zero, the ball 3 is against the center of the permanent magnet 5. Due to the symmetrical arrangement of the magnetically controlled contacts 4 relative to the permanent magnet 5, its magnetic force action is equal for both magnetic-controlled contacts. In the interval between the contact parts (working gap), the magnetically controlled contacts under the action of the current source 7 excite a glow discharge. current in the tenth of a milliampere. In this case, the magnitude of the discharge current is controlled by variable resistors 6. The equality of the discharge currents in the MC determines the equality of the voltage drops across them, and the closest equality of the potentials at points A and B of the circuit to which they are connected.

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merrunts on duty d. When this is done, its sting will stop in the middle of the scale at zero. I When the object is deflected, the ball 3 will displace b under the action of gravity with respect to

) state of the magnet 5. The equality of the magnitude of the force effect on the magnetically controlled contacts 4 is violated and the size of the working gaps MK will change. An insignificant change in the working clearance causes

“Significant changes in voltage drop on the MK. The balance of the bridge is disturbed and the needle of the voltage meter 8 deviates from its zero position, indicating a torque of deviation of the object. When the object is tilted in the opposite direction, the meter of the voltage meter 8 also tends to the opposite direction, fixing not only the value, but also the direction of deflection of the object.

Claims (1)

Invention Formula The tilt angle sensor, comprising a housing, a radially bent | Tube with a sensitive element placed therein - a ferromagnetic material, a magnetic field source, a magnetically sensitive element and a current source, characterized in that, in order to simplify the design and increase reliability sensor, magnetosensitive elements in it are made in the form of sealed magnetically controlled contacts and are located on the side: the smallest radius of curvature of the tube is symmetrical with respect to the source of the magnetic field, the latter is installed on the side of the largest radius, and the contacts are included in the source circuit in a differential circuit. 5 4 J 4 A: X