SU1312374A1 - Device for measuring lead of metal helix - Google Patents

Description

113

Brythium does not belong to the instrumentation technology and can be used in automatic lines for the manufacture of various metal spirals, for example springs.

The purpose of the invention is to expand the scope by eliminating the dependence of radiation on the angle between the direction of radiation and the axis of the helix.

The drawing shows the functional diagram of the device.

A device with an impulse generator 1 connected to a key 2, the output of which is electrically connected by a feed drum 3, a stable current source 4, the output of which through a resistor 5 is connected to the input of a switch 2, a capacitor 6, a receiving drum 7, a measuring coil 8, in parallel An additional capacitor 9, amplitude detector 10, amplifier 11 and indicator 12 are on.

The device works as follows.

In the initial state, the helix is wound on the supply drum 3. The free end of the helix is passed through the measuring coil 8 and is fitted on the receiving drum 7, which is electrically connected to the common drive. The generator 1 generates pulses that are fed to the control input of the key 2, the latter opens with the frequency of the incoming pulses, so that through it from the source 4 of a stable current through the resistor 5 n capacitor 6, the current pulses are stable in size to the supply drum 3.. feed 3 and receiving 7 drums form a solenoid, a magnetic field which is proportional to the number of turns in the solenoid and flowing. Thanks

Compiled by L, Kryukova Editor B. Petrash Tehred.A. Kravchuk Proofreader L.Vorovich

Order 1960/38 Circulation 678 Subscription

BNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab, 4/5

Production and printing company, Uzhgorod, st. Project, 4

23742

the fact that the amplitude of current pulses flowing through sp1) ali is stabilized by a source 4 of stable TCA, the electromagnetic field created by the 5th helix depends only on the pitch of the helix and does not depend on its conductivity.

To measure the value of the electromagnetic field produced by the helix, a measuring coil 8 is used, through which the helix passes. The measuring coil 8 together with the capacitor 9 forms an oscillating circuit tuned to the frequency of the generator 1 of pulses. The voltage from the measuring coil 8 is detected by the amplitude detector 10, amplified by the amplifier 11 and fed to the indicator 12, calibrated directly in units of the pitch of the helix.

Claims (1)

Formula of the invention A device for measuring the pitch of a metalic helix containing a pulse generator, a measuring coil, a series-connected stable current source, a resistor and a capacitor, and an indicator for which purpose. expanding the field of application, it is provided with an input and output drums amplitude detector connected to its output by an amplifier, the output of which is connected to an indicator, an additional capacitor connected to a measuring coil, inside which the measured helix is passed, and an input of an amplitude detector, and the key, the inputs connected to the pulse generator and the resistor, the output to the feed drum, and the capacitors and the receiving drum are connected to the zero bus.