SU1177665A1 - Device for measuring external diameter of article - Google Patents

Abstract

A DEVICE FOR MEASURING AN EXTERNAL DIAMETER OF PRODUCTS, containing an optoelectronic scanning system, connected in series with an amplifier connected to the first output of an optoelectronic scanning system, and a driver, a trigger and a recorder, which are used in order to extend the range of a measuring device, in order to extend the range of a real estate, there is a real estate. pulses and pulses of interference from the central beams, the memory circuit until the next measurement cycle, the three three-input coincidence circuits and the two-input coincidence circuit, the second The second output of the optoelectronic scanning system is connected to the write enable input and the setup input of the memory circuit until the next measurement cycle and the setup input of the specified counter, the output of the driver is connected to the counting input of the specified counter, the first and second inputs of the first three-input matching circuit and the first inputs of the second and third three-input circuits match, the first output of the specified counter is connected to the third input of the first three-input matching circuit, the output of which is connected to the counting input three the second output of the specified counter is connected to the counting input of the memory circuit to the SL of the next measurement cycle and the second input of the third three-input coincidence circuit; the first and second outputs of the memory circuit are connected to the next measurement cycle respectively, with the third inputs of the second and third three-input circuits coincide sl, the outputs of which are connected to the two-input coincidence circuit, the output 05 of which the course is connected to the set The trigger input connected to the SL recorder.

Description

1i

The invention relates to a measuring technique, in particular, to devices for contactless measurement of the outer diameter of products, and can be used to control the outer diameter of glass tubes, wires, and t.

. The purpose of the invention was the expansion of the measurement range.

In Fig. 1, a block diagram of a device for measuring the outer diameter of products is shown; Figures 2 and 3 show, respectively, images of the product on the screen of the photovoltaic converter and the shape of the pulses at the outputs of individual elements of the device cxehit for transparent products; in fig. 4 and 5 -. the same for opaque products

A device for measuring the outer diameter of products contains an optoelectronic scanning system consisting of illuminator 2, capacitor 3, lens and phototransformer 5, amplifier 6, driver 7 and three-input coincidence circuits 8-10 (e.g., logic elements 3), two input circuit I 1 co) W, EDS11 (logic element 2I-NOT counter 12 measuring pulses (decimal counter with decoder), trigger 3 (trigger D type with installation in O,), memory circuit 14 (consisting, for example, Trigger type D and logic element 2 W1I-NO Il and any inverter), the recorder 15 of the outer diameter of the measured product 16.

The amplifier 6 is connected in series with the driver 7 and connected to the first output of the scanning system, its second output is connected to the recording enable input and the installation input of the memory circuit 14 and to the installation input of the counter 12, the output of the imager 7 is connected to the counting input of the 1.2, first and the second input of the first three-input coincidence circuit 8 and the first inputs of the second and third three-input circuits 9 and 10 coincidence; The first output of the counter 12 is connected to the third input of the first three-input coincidence circuit 8, the output of which is n with the counting input of the trigger 13, the second output of the counter 12 is connected to the second input of the second three-input coincidence circuit 9, the third output of the counter 12 is connected to the counting

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the input of the memory circuit 14 and the second input of the third three-input circuit 10 of coincidence. The first and second outputs of the memory circuit 14 are connected respectively to the third inputs of the second and third sin-gate circuits 9 and 10 coincidence, the outputs of which are connected to a two-input coincidence circuit 11, the output of which

0 is connected to the setup input of the trigger 13, connected to the recorder 15.

The device works as follows.

s The illuminator 2 and the capacitor 3 create a beam of light illuminating the measured product -16. Using a lens 4, a shadow image of the product 16 is projected onto the input screen of the converters 5 (Figures 2 and 4).

As a result of reading the shadow image of the product 16 by the photoconverter 5 to the input of the imaging device 7 after the amplifier 6. pulses are received, the shape of which is shown

on fig.Zb, and. From the output of the imaging unit 7, the pulses (Figs. 3 and 5) are fed to the input of the counter 12 and the inputs of the matching circuits 8-10.

Q Operation of the device when measuring transparent products (Fig. 3). As can be seen from the voltage diagrams, the number of preparatory cycles depends only on the initial state of the trigger 18 (Fig. 3s, g),

Consider two cases. If the output Q of the flip-flop 18 has a level of Log.1, then a preparatory cycle is required to change the state of the flip-flop.

18 memory, and then the measurement cycles begin (Fig. 3). If the output P of the flip-flop 18 has - Log.O, then there is no preparatory cycle, and the measurements start from the first cycle (Fig. 3).

The operation of the device when measuring opaque products (figure 4). In this case, the number of preparatory cycles also depends on the initial state of the trigger 18 (Fig. 5g).

Consider two cases. If the output Q of the flip-flop 18 is at the level of the Log.O. (fig.Zh), then two preparatory cycles are required: the first to measure the state of the flip-flop and the second to form the reset signal of the flip-flop 13 on. the output of the circuit 11 3 (figure 5). If the output Q of the trigger 18 has a level of Log, 1, then there is no first cycle, and the measurements begin after the signal generation cycle. reset trigger 13. Counter .12 is a block with one counting input and three outputs, on each of which a signal appears only corresponding to the pulse counted. For example, when the first pulse passes, the output signal is only on the first output, the second pulse on the second one, and so on. (FIGS. 3 and 5d, e). The second input of counter 12 is set, brings the counter to the initial state (no signals on all:. outputs) before each measurement cycle. The first pulse passes through the coincidence circuit 8 and its trailing edge (FIGS. 3 and 5, h) forces the trigger 13,. The passage of the second or third pulses through the circuits 9 or 10 matches depends on the information in the memory circuit 14 (FIG. 3k, l, figs 5i, k), which until the next cycle of measurements, remembers the state of the third output of the counter 12 (figs, 3 and 5e). The memory circuit 14 operates as follows. At the beginning of each measurement cycle, the synchronization pulse sets the trigger 17 to the initial state: the output Q is one, and the output Q is zero. If-there is a third pulse from the third output of the counter 12, then it transfers the i state of the trigger 17 to the opposite, i.e. output Q is one, and output O is zero. Then, at the end of the measurement cycle, a pulse rewrite arrives at input C of trigger 18 and status information of trigger 17 is overwritten by trigger 654 18, with zero output Q and zero at output Q. one. If the third impulse is absent, the rewrite impulse will overwrite the initial information in the trigger 18, i.e. at the output of Q. trigger 18 unitig., and at the output of Q zero. Since the outputs of the trigger 18 are connected to the inputs of the circuits 9 and 10, then the trigger 13 (through: the circuit 11 matches) receives the second or third pulse depending on the state of the outputs of the trigger 18.. If the counter is 12 in. Before the measurement cycle receives two pulses, a signal appears at the first output of the memory circuit 14, i.e. a second pulse passes through the coincidence circuit 9. If three pulses go to counter 12 in the previous measurement cycle, then a third pulse passes through the circuit, 10 coincidences. Thus, the memory circuit 14 allows the input pulses to be redistributed. Photoconverter 5 generates a synchronizing rectangular positive pulse (Fig. 3 and 5a). This pulse starts before the measurement of IJa3Mepa, and ends after measurement. The clock pulse through the RC-differentiating chains with the leading edge sets the counter 12 and circuit 4 to the initial position, and with the falling edge overwrites the information inside the circuit 14. Thus, the second or third pulse passed through the circuits 9 or 10 coincidence and circuit I coincides. trigger trigger 13. The duration of this pulse is proportional to the measured size of the product. The recorder 15 transforms the rectangular impulse indication of the outer diameter.

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Claims (1)

(57 / DEVICE FOR MEASURING AN EXTERNAL PRODUCT DIAMETER, comprising an optoelectronic scanning system, an amplifier connected in series, connected to the first output of an optoelectronic scanning system, and a shaper, trigger and recorder, characterized in that, in order to expand the measurement range, it is equipped with a measuring pulse counter and interference pulses from the central rays, a memory circuit until the next measurement cycle, three three-input matching circuits and a two-input matching circuit, the second output is the electronic scanning system is connected to the recording permission input and the installation input of the memory circuit until the next measurement cycle and the installation input of the specified counter, the shaper output is connected to the counting input of the specified counter, the first and second inputs of the first three-input matching circuit and the first inputs of the second and third three-input matching circuits , the first output of the specified counter is connected to the third input of the first three-input matching circuit, the output of which is connected to the counting input of the trigger, the second output d the specified counter is connected to the second input of the second three-input matching circuit, the third output of the specified counter is connected to 9 counting inputs of the storage circuit until the next measurement cycle and the second input of the third three-input matching circuit, the first and second outputs of the storage circuit until the next measurement cycle are connected respectively to the third inputs the second and third three-input matching circuits, the outputs of which are connected to a two-input matching circuit, the output of which is connected to the installation input of the trigger connected about with the registrar.