SU853384A1 - Device for checking circular measures - Google Patents

Description

The invention relates to instrument engineering and can be used to control circular measures, such as limbs, scales, grids. A device for monitoring bar-shaped measures, containing an adjustment microscope microscope, two photo cells included in a measuring circuit is known. However, with the help of such a device one can only determine the limb division error, i.e. the distance between two adjacent strokes. The closest in technical essence and the achieved result to the invention is a device for monitoring circular measures, comprising a housing with a countable angular system installed on it, a photoelectric microscope, a matching unit and interconnected error signal generation unit and a recorder. The disadvantage of the device is the impossibility of determining the accumulated measurement error from any initial stroke. The purpose of the invention is to improve the accuracy of measurement and increase productivity. This is achieved by the fact that the device for monitoring circular measures is equipped with a sequential nporpaN iHHM unit, a time unit, a computing unit whose output is connected to an error signal generation unit, a comparison circuit whose input is connected to the matching unit, and an output unit to the computing unit , the unit of optical orientation, and the reference angle system is made in the form of an angular velocity sensor with a drive, an optical orientation unit is placed on the angular velocity sensor under a photoelectric microscope, the outputs are The ones are connected to the computing unit, the drive is connected to the software unit. FIG. 1 shows schematically the proposed device for monitoring circular measures; in fig. 2 are diagrams of signals from a photoelectric microscope, an angular velocity sensor and a block of time, respectively. The device consists of a housing 1 with a bracket, an angle sensor 2

speeds (DLS), for example, an annular laser circuit, an optical orientation unit 3 with a rotating carriage and micrometric screws, a photoelectric microscope 4, a drive 5, a matching unit 6 in the form of a split photoresistor, a comparison circuit 7, a program block 8, a time block 9, a computing unit 10, power supply unit 11, error signal generation unit 12, recorder 13.

The device works as follows.

A controlled measure 14 (e.g., a limb) is installed on the carriage of the optical orientation unit 3 of the pre-leveling device, orienting it with micrometric screws and rotating the carriage of the optical orientation unit 3 in the horizontal plane in two coordinates and the angle of rotation around the axis perpendicular to this plane until centered position of the controlled measure 14 relative to this axis, i.e. the image of the zero bar of the measure 14 to be monitored must coincide with the crosshair of the optical head (not shown) of the optical orientation unit 3. Ustan: infuse block b matching to the zero position, i.e. move it until the output of the comparison circuit 7 associated with it is a zero signal.

Then, a predetermined measurement volume is planned for certification of measure 14, a program is laid in program block 8 and power is supplied from power block 11. The software block 8, respectively, provides an electrical signal to the actuator 5, which causes the rotation of the TLS 2, the block 3 optical orientation and a controlled measure 14 around the vertical axis. At the same time, a signal is sent from the program block 8 to the rotation block 9, from which pulses begin to arrive at the computing unit 10.

At the moment of intersection of the photoelectric microscope 4 lines of the controlled measure 14, the electrical signal V or L-shaped forms from the photoelectric microscope 4 is fed to the computational microscope 4

block 10. At the moment a certain level of this signal is reached, the current number of pulses is read from the TLS 2 and time block 9 and the computing unit 10 forms the information about the angle between the zero stroke of the monitored measure 14 and the current stroke of this measure. The angle is equal to

0.E-of. P.

-one

where 1l} - the number of pulses

 DLS 2;

n is the number of pulses of the reference frequency, the number of pulses

TLS 2 from the zero pulse to the moment of reading. In the error signal generation unit 12, the current angle value from the zero stroke of the monitored measure 14 to the current stroke is compared with the calculated angle value, and from the output of block 12, the error signal goes to the recorder 13 (plotter or digital printing device).

Claims (1)

: Invention Formula A device for monitoring circular measures, comprising a housing with an angle reading system installed on it, a photoelectric microscope, a matching unit and interconnected error signal generation unit and a recorder, characterized in that, in order to improve measurement accuracy and productivity, it is provided connected in series a software unit, a time unit, a computing unit, the output of which is connected to the error signal generation unit, a comparison circuit, the input of which is connected to the unit and the output is with a computing unit, an optical orientation unit, and the reference angular system is designed as an angular velocity sensor with a drive, an optical orientation unit is placed on the angular velocity sensor under a photoelectric microscope, the outputs of the latter are connected to a computing unit, the actuator is connected to a software unit .