SU1252671A1 - Device for measuring area of non-transparent plane figure - Google Patents

Abstract

The invention relates to instrumentation technology and can be used in measuring machines designed to measure the area of flat figures, for example, a leather bag, leather, etc., in the leather goods, sewing, fur industry. The aim of the invention is to improve the accuracy of measurements, reduction of time of measurements and simplification of the structure due to the use of sources of the radiation (scattered) radiation. The measured figure moves in the transverse direction in the vicinity of the receiver array and is illuminated with a radiator array. In this case, receivers are used, some of which are located in the path of radiation of several emitters, emitters in the path of radiation of which at least one receiver are switched on and off alternately, and signals at the outputs of receivers in the path of radiation of the same the emitter in the on state is also recorded alternately. 3 hp ff, 6 ill., 2 tab. you (L N3 SP 05

Description

The invention relates to measuring equipment and can be used in measuring machines designed for measuring the surface of flat figures, for example, patterns, leather, etc., in leather, shoe, fur, pgain, leather haberdashery and light industry.

The purpose of the invention is to improve the measurement accuracy, reduce the measurement time and simplify the design by using sources of scattered radiation and redistributing the connections of sources and receivers.

FIG. I shows the interaction of emitters and radiation receivers; in fig. 2 is a diagram of a device for measuring the area of an opaque} of 1 flat figures; in fig. 3 is a diagram of the interaction of emitters and radiation receivers for a specific number of radiation detectors and radiation receivers; in fig. 4 is a block diagram of synchronization, the first option; in fig. 5 - the same, the second option; in fig. 6 is a diagram of the device with a specific number of emitters and radiation detectors.

The device contains a line of emitters, for example LEDs, a line of 2 radiation detectors, for example photodiodes, between them there is a measured flat figure (object 3 lying on the measurement line (plane), for example conveyor A with drive 5. The device also has a sensor 6 of the area sweep line, St — zanny with conveyor 4, synchronization unit 7, power supply 8, switch 9 of emitters, counter 11, switch 10 (radiation receivers), decoder 12, indicator 13.

A line of 1 emitters through a switch 9 emitters connected to the power source 8. The line 2 of the radiation receivers through the switch 10 is connected to the counter II, which is connected via the decoder 12 to the indicator 13. The output of the sensor 6 of the row is connected to the input of the synchronization unit 7, one of the outputs of which is connected to the switch 9 of emitters and the other output to the switch 10 of the receivers radiation.

The synchronization unit 7 may contain a trigger 14 lines, the selector 15,

-71

made 1 p n | in the form of a logical element And, and the generator 16 clock pulses of the survey. Sensor 6 line sends signals to the trigger line K,

the last gating signal; 1 l, supplied to one input of the selector 15, the other input of which is connected to the generator of 16 clock pulses, and connected to the switches 9 and 10 of emitters and radiation receivers. The second input (R) of the trigger line 14 receives a line termination signal, which is fortiruem in switch 9. Another implementation of synchronization unit 7 is possible. In addition to the generator 16, it contains the driver 17 pulses, the shift register 18, the output keys 19.

The synchronization unit 7 may contain, in addition to the trigger 14 lines, the selector 15 and the generator 16 clock pulses, frequency divider 20 (three). The transmitter 9 of the emitter may comprise a binary counter 21, a decoder 22, and a line termination signal generator 23. The switch 10 of the radiation receivers can contain amplifiers 24 of the signals of the radiation receivers and the multiplexer 25 for the com-

signal mutations to one output (Fig. 6).

The device works as follows.

If we take the step between the radiators of the ruler 1, equal to the step between the radiation receivers of the ruler 2, and denote this step by L, the distance between the ruler 1 of the emitters and the ruler 2 of the radiation receivers through H, and the distance between the measurement line and the ruler 2 of the receivers through h, then the length S of the element follows from the similarity of rectangular triangles formed by the working rays

space decomposition:

S b h

The conveyor 4 moves the measured object 3 to the measurement zone between the ruler 1 of the emitters and the ruler 2 of the radiation receivers. When moving, a part of the radiation receivers is darkened by the object being measured 3.

According to the signal of the sensor 6 of the row, the synchronization unit 7 provides control signals to the switch 9 of emitters and to the switch 10 of the radiation receivers. Switching occurs emitate3

the leu of the I line and the survey of the radiation receivers of the ruler 2. The counting area pulses formed at the output of the switch 10 of the radiation detectors arrive at the input of the counter 11, summed up last and through the decoder 12 are fed to the indicator I3 (digital area indicator).

In order to shorten the measurement time and simplify the device, they can be connected to each other either by the radiators of the line 1, on the radiation path of which there are no o6apix radiation receivers, or by receivers that are not in the path of the rays of the same radiator.

FIG. Figure 3 shows the interaction between the emitters and receivers of a device containing a line of emitters of eight LEDs and a line of radiation receivers of six photodiodes.

Since each photodiode interacts with only three LEDs, the total number of elementary pads that need to be interrogated when forming a scanning line is, for example, 18.

These elementary sites can be interrogated in various ways, depending on the combination of emitters or radiation receivers.

Let, for example, it is necessary to poll emitters, on the way of which radiation there are no common radiation receivers, i.e. emitters 1.1 and 1.4 can be combined; 1.2 and 1.5; 1.3 and 1.6; 1.4 and 1.7; 1.5 and 1.8.

Since the total number of polls is 18, and two photodiodes are polled at each switching cycle of the emitters, for example, Table 2 can be compiled. one.

From tab. As can be seen in Figure 1, each photodiode is interrogated as many times as the number of LEDs interact with it, and also, switches of emitters and radiation receivers must be built.

Let the radiators be switched on in series, with the outputs of the radiation receivers that are not in the path of the rays of the same radiator, can be combined with each other (for the purpose of, for example, reducing the number of amplifiers of their signals). In this case, the interaction

ten

five

20

25

2526714

Emitters and receivers can be described in Table. 2

As can be seen from the table. 2, for eight consecutive clock cycles, the emitters are interrogated, as in the case of operation according to Table. 1, all 18 elementary areas forming a scanning line.

Therefore, in this case, the outputs of the receivers can be combined: 2.1 and 2.4; 2.2 and 2.5; 2.3 and 2.6 (Fig. 3). The total number of polling cycles (in excess) of all radiation receivers is 24 in this case.

If the outputs of the receivers are 2.1 and 2.4; 2.2 and 2.5; 2,3 and 2,6 combined, the device works as follows (Fig. 6).

When a signal is received from sensor 6, line trigger 14 is set to position 1, by sending an enable signal to selector 15, to the second input of which pulses from a generator of 16 clock pulses are constantly applied. As a result, when the signal from sensor 6 is received, the clock pulses from synchronization unit 7 are sent to switches 9 and 10.

At the output of the switch 9, the signals supplied to the emitters of the ruler 1 sequentially appear. At each turn-on time of the emitters of the ruler 1, three interrogation signals of the receivers of the radiation of the ruler 2 appear at the clock input of multiplexer 25, each of which causes the appearance of an enable signal for switching to the output of the signals of the respective radiation receivers through the amplifiers 24.

In the first step of switching on the E1 emitters 1, the first emitter is turned on and only the first radiation receiver of the line 2 is polled (the other two receivers do not work). In the second cycle of switching on the emitters, the second emitter of the ruler 1 is turned on and the first and second radiation receivers of the ruler 2 are polled and so on in accordance with Table. 2 (the third receiver does not work). Three receivers are then polled. During the time line is the formation of signals from all elementary areas forming the scan line.

thirty

five

0

five

0

five

When nlonia (. Ngnapa on the ninth output of depp1frapra 22, the line termination signal generator 21 generates a signal, resetting the trigger line 14 to the zero position, which causes the clock pulses from the generator 16 to stop through the selector 15.

When forming the next signal of the line, the cycle is repeated.

Claims (4)

1. A device for measuring the area of opaque flat figures containing a line of emitters connected to a power source, a line of radiation receivers installed in the path of radiation generated by emitters connected by outputs through a first switch with a counter input whose output is connected via a decoder to the indicator and a synchronization unit connected to the control input of the first switch, characterized in that, in order to improve the measurement accuracy, the emitters h receivers are installed so that at least SET D some of the receivers in the path of each Lena several successive radiation emitters, including Men necks least one radiator, the path 1.1; 1.4 1.2; 1.5 1,3; 1,6 1.2; 1.5 1,3; 1,6 1.4; 1.7 1.3; 1.6 1.4; 1.7 1.5; 1.8 2.1; 2.4 2.1; 2.4 2.1; 2.4 2.2; 2.5 2.2; 2.5 2.2; 2.5 2.3; 2.6 2.3; 2.6 2.3; 2.6 52671ft the radiation of which is installed adjacent receiver, and the emitters are connected to the power source through the second switch, the control input, which is connected to the synchronization unit. 2. The device according to claim I, of which is, in order to reduce the measurement time and simplify the design, the emitters, on radiation paths which do not have common receivers are interconnected. 3. The device according to p., Characterized in that the outputs 15 receivers that are not in the path of the rays of the same radiator are interconnected. 4. The device according to claim 1, about tl, is that each receiver is installed in the path of radiation of the same number N of emitters, the sequence numbers of which differ, respectively, from the order of the number of emitters, in the path of radiation of which 25 the receiver, by the same amount as the receiver numbers, and the synchronization unit contains a clock pulse generator, a pulse selector, the output of which forms one output of the synchronization block, and a frequency divider whose input is connected to the output of the pulse selector, and the output forms another output of the sync block. Table 1 3.1; 3.10 3.2; 3.11 3.3; 3.12 3.4; 3.13 3.5; 3.14 3.6; 3.15 3.7; 3.16 3.8; 3.17 3.9; 3.18 Table 2 fy2.: / CD I am I f and Fig.Z FIG. H No R nineteen R  H R eleven G ppL4J m FI8.5 Compiled by E. Glazkova Editor M, Blanar Tehred M. Khodanych Proofreader S. Cherni Order 4615/43 Circulation 670 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, Projecto st., 4 6