SU771550A1 - Device for measuring feed and draft of fabric - Google Patents

Description

one

The invention relates to a measurement technique and can be used to measure feed and draw in the textile industry, for example, on needle-punching machines.

A device for measuring the supply and stretching of a fabric is known, comprising a switching unit, a sensor for moving the feeding mechanism, a sensor for moving the exhaust mechanism connected through 10 main computing unit with an indexing unit, and a trigger unit, the first and second outputs of which through the unit of measurement time and directly connected to the second and third 5 inputs of the main computing unit, and the third output to the input cm of the auxiliary computing unit l1. However, the start of the measurement is performed at an arbitrary time 20 in comparison with the signal from the displacement transducer of the output mechanism, therefore, in order to eliminate errors associated with this, it is necessary to increase the measurement time. 25

The purpose of the invention is to improve the accuracy and reduce the measurement time.

This goal is achieved by the fact that the proposed device contains 30

A sensor for triggering the needle punching mechanism and a first pulse waiting unit; the outputs of the frequency sensor for triggering the needle punching mechanism and the feed mechanism movement sensor are connected to the inputs of the switching unit whose outputs are connected to the first input of the first pulse waiting unit and the second input of the auxiliary computing unit, the fourth and the fifth inputs of the main computing unit are connected to the outputs of the auxiliary computing unit and the waiting unit of the first pulse, the second input to torogo coupled to the fourth output of the trigger block.

FIG. Figure 1 shows the layout of the sensors and the feed and exhaust mechanisms and the needle-punching mechanism} in FIG. 2 is a block diagram of a device for measuring tissue feed and stretch.

The device includes a needle-piercing mechanism sensor 1 associated with the needle-piercing mechanism 2 of the blade 3, a sensor 4 for moving the feed mechanism connected to the material feed mechanism 5, and a sensor 6 for moving

nor the stretching mechanism associated with its mechanism 7.

The sensors 1 and 4 of the needle punching and moving mechanism of the feed mechanism are connected to the switching unit 8. The launch unit 9 is connected to the main computing unit 10, the auxiliary computing unit 11, the unit 12 for waiting for the first pulse and the measurement unit cm 13. To the inputs of the main computational unit 10, the sensor 6 for moving the exhaust mechanism and the setting unit 13 of the measuring time are connected, and the display unit 14 is connected to the output of the unit 10.

Each of the outputs of the switching unit 8 through the waiting unit 12 of the first pulse and the auxiliary computing unit 11 are connected to the corresponding inputs of the main computing unit 10.

The measurement of the fabric supply is made by comparing the frequency of the pulses from the sensor 6 moving the stretching mechanism with the frequency of the pulses from the sensor 1 of the needle-punching mechanism.

The measurement of the stretching of the fabric occurs by comparing the frequency of the pulses coming from the sensor 6 moving the stretching mechanism and sensor 4 moving the feeding mechanism.

The device works as follows.

When the start-up unit 9 is turned on, the output signals are supplied to the main unit 10, auxiliary unit 11, to the unit 12 for waiting for the first pulse and to the setpoint 13 of the measurement time.

These blocks are switched to the initial state of the 1 st measurement level.

When the first pulse arrives from the sensors of the needle-punching mechanism or moving the feed mechanism through the mutation block 8, the block 12 Waiting for the first pulse generates a measurement start signal to the main one: the computing unit 10, which starts to pulse with the interlace sensor 6. stretching mechanism.

Simultaneously, the auxiliary computing unit 11 begins to fill with pulses from sensor 1 or 4. After filling, the auxiliary computing unit 11 outputs a signal to the end of the measurement in block 10. The output signal of which is recorded in the display unit 14.

The measurement time of the sensor 6 for moving the exhaust mechanism can be preset by signals from the measurement time setting unit 13.

Claims (1)

1. Patent of France 2212922, cl. a 01 D 1/16, 1974. fig i