SU830441A1 - Device for counting objects conveyed by conveyer - Google Patents

Description

one

The device is related to computer systems in automation, designed to account for items placed in a row on a rigid base moved by a conveyor to can be used in enterprises of the metallurgical, food industry of the construction materials industry, in particular, in factories where brick-laying machines are used. In the latter case, the device can automatically record bricks on the frames moved by the conveyor.

It is known a device for counting the number of items on a conveyor, equipped with a device for eliminating errors in the case of butt-and-place objects and containing special attackers and lugs located under the conveyor belt, disrupting the flow of boxes in such a way that when they are installed close to each other in place the location of the photoelectric sensor is formed wedge-shaped gap

The drawbacks of the device are the impossibility of working with unequally high Objects, possible interrogation; following the previous precedents, possible miscalculation when following insufficiently strictly oriented objects.

along the line of sight of form. Counting items, moving on a hard base, such a device is generally impossible.

The closest technical

The essence and the achieved result to the proposed is a device for counting the number of objects moved by the conveyor, containing the main and additional sensor

the presence of an object connected to the inputs of the coincidence circuit, the output of which is connected to one of the trigger inputs, which sequentially includes the block for setting ratios

speeds of the conveyor section. The inputs of the pulse generator and the registration unit are also connected to the input of an additional sensor for the presence of an object connected to the input of the coincidence circuit, and the output of the pulse generator is connected to the second one. the trigger input, the primary and secondary sensors of the object are installed respectively at the beginning of one

Claims (2)

and the end of the other section of the conveyor at a distance of less than two lengths of moving objects. When moving single objects, the position sensors of the object give sequential signals to the coincidence circuit, which does not open, the trigger is in the zero state, the conveyor sections have the same speed, the signal about the additional sensor of the position of the object enters the register unit. the position of the object is triggered by a coincidence circuit, the trigger goes from zero to one, and the block for setting the speed ratio of the conveyor sections increases the speed of the second ktsii conveyor that leads to the formation of a gap between the objects. After leaving the unit from the zone of an additional sensor, the latter sends a signal to the pulse shaper, which returns the trigger to its original zero state, the speed of the conveyor sections a hundred is the same 2. The disadvantages of such a device are two consecutive conveyor sections; changing the position of objects as a result of passing through the device (if their initial state is butt-end arrangement); impossibility of the correct account when moving the objects end-to-end mounted on a rigid base; the possibility of false counts when an additional sensor of the object is triggered from extraneous causes (for example, interrupting a photoelectric sensor beam with a hand). The purpose of the invention is to improve the accuracy of the device. Delivered tsl is achieved by the fact that a device for counting objects moved by a conveyor, containing first and second sensors for the presence of an object that are connected to the first and second inputs of a coincidence element, a pulse shaper whose input is connected to the first sensor for the presence of an object and a registration unit, are entered a pulse generator and a pulse counter, the output of which is connected to the registration unit, the pulse generator is connected to the third input of the coincidence element, the output of which is connected to the first input of the pulse counter c, the second input of which is connected to the output of the pulse formation. The drawing shows a block diagram of a device for counting objects moved by a conveyor. The device contains a pulse generator 1, a second and first sensor 2 and 3 of the presence of the object, a coincidence element 4, a pulse counter 5, a recording unit b, a pulse former 7. During operation, the pulse generator 1 causes a fixed number of pulses per unit length of the conveyor, respectively, per unit length of the moving object. The condition for the passage of pulses is the simultaneous presence of a signal from sensors 2 and 3 of the presence of an object. Thus, each item, regardless of its location butt-in or separately, corresponds to a certain number of pulses passing into intermediate x; The number of pulses per item length and the capacity of the intermediate counter are chosen equal to or, for example, multiples of ten. Then block 6 of registration registers units or tens of items. When objects with a certain amount of bias are skewed, their size from the second sensor 2, the presence of an object (for example, a photoelectric sensor) can be overestimated, i.e. a greater number of pulses will pass that do not correspond to the length of the object. The extra pulses accumulate in the counter 5 pulses. With the passage of the rear edge of the rigid base through the first sensor 3 of the presence of the object, the pulse shaper 7 generates a reset signal of the pulse counter 5. Thus, after passing through each of the rigid bases, the pulse counter 5 is completely cleared. The absence of a signal on element 4 from the first sensor 3, the presence of the object (base) during technological interruptions in the supply of objects ensures that random pulses (by hand, random objects, etc.) pass into the counter 5 pulses. This fact and periodic cleansing of the counter ensures the accuracy of the account in block b of registration. The technical and economic efficiency of the proposed device is determined by the possibility of correctly counting the items moved by the conveyor along with the rigid base on which they are installed close to or at intervals. In the proposed device, in contrast to the known, there is no need for an additional section of the conveyor, to change the speed of the conveyor and the corresponding switching equipment, in the block setting the speed ratio of the section of the conveyor; when passing through the device, the arrangement of objects does not change when following them end-to-end; it is possible to score items following a butt and mounted on a rigid base; the possibility of false accounting during technological interruptions in the arrival of objects is eliminated, since the device reacts to objects only if there is a permissive signal from the base sensor. The economic effect is determined by the technology of a particular production. Thus, in the conditions of application of an automatic stacker (a widely implemented modern mechanism) in brick factories, the accounting of bricks installed on a rigid frame is best suited to the conditions of technology, since such accounting follows after the rejection of a brick behind a cutting automatic machine. The bricks on the frame mentioned are installed with a gap, but a gap between them is also possible. The existing accounting of bricks in factories by the number of trolleys does not meet the requirements of metering accuracy. An apparatus for counting objects moved by a conveyor, comprising first and second sensors for the presence of an object, which are connected to the first and second inputs of a coincidence element, a pulse shaper, the input of which is connected to the first sensor for the presence of an object, and a registration unit, characterized in that In order to improve the accuracy of the device, a pulse generator and a pulse counter, the output of which is connected to the registration unit, are entered into it, the pulse generator is connected to the third input of the coincidence element, output D of which is connected to the first input of the pulse counter, the second input of which is connected to the output of the pulse former. Sources of information taken into account in the examination 1. UK patent number 1370705, cl. G 4 D, publ. 1975 2. USSR author's certificate number 496578, cl. G 06 M 7/04, 1974 (prototype).