SU765645A1 - Device for measuring the length of articles on conveyer - Google Patents

Description

one

The invention relates to the measurement of linear dimensions and can be used to measure the length of products on a conveyor, for example a rotary butt-processing machine.

A device for measuring the length of products on a conveyor is known, comprising coarse measurement sensors, the axis of sight of which is oriented at an angle to the direction of movement of the product, precision measurement sensors, a logic circuit, a pulse generator, a fixing counter, the input of which through a logic circuit is connected to the output of the pulse generator, exceeding the length of the product relative to the base size is determined by the number of generator pulses recorded by the counter for the length of time between the switching of the product of one of the sensor a coarse measurement and accurate measurement sensor, the measurement end fiksiruyup1im IJ.

The disadvantage of this device is the low accuracy of measuring the length of the products when the transport speed of the product in the measurement zone fluctuates.

The closest in technical terms to the present invention is a device for measuring the length of products, on a conveyor belt containing an illuminator and a photodetector, the optical axis of which is oriented at an acute angle to the longitudinal axis of the product, a pulse sensor, the output of which is connected to the first key input, the second the input of which is connected to the output of the photodetector, and a pulse counter, the counting input of which is connected 10 to the output of the key (2).

The disadvantage of the device (h is the presence of errors due to the change in the sizes of the products, as well as the low accuracy of the measurement of the length of the package of products in the case when it is impossible to install the illuminator n photodetector at the conveyor outlet. The purpose of the invention is to improve the accuracy of measurement.

Claims (2)

It is achieved by the fact that the 2Q device is equipped with a synchronization sensor, a setpoint block, a memory unit, an adder and a control unit, the outputs of the setpoint unit are connected to the installation inputs of a pulse counter, the outputs of which are connected to the accumulator inputs through the memory unit, the inputs of the control unit are connected to the output the sensor of synchronization of the photodetector and the pulse counter, and the outputs with the inputs of the setpoint unit and the memory unit. FIG. 1 shows the design of a pre, lagged device; on fi1. 2 is its block diagram. A device for measuring the length of the product 1 on the conveyor with grippers 2 contains a photodetector 3, an illuminator 4, a sensor 5 pulses, a sensor 6 synchronization, a key 7, the first input connected to the output of the sensor 5.pulses, the second input - with the output of the photodetector 3, block 8 The outputs of which are connected to the installation inputs of the counter 9 pulses, the counting input of which is connected with the output of the key 7, the block 10 of the memory. the input is connected to the output of the pulse counter 9, and the output is to the input of the adder 11, and the control unit 12, the inputs connected to the outputs of the pulse sensor 5, the photodetector 3 and the counter 9, and the outputs to the inputs of the setpoint unit 8 and the memory unit 10 ti. The optical axis of the photodetector 3 and the illuminator 4 is directed at an angle oL to the longitudinal axis of the product 1 lying on the grips 2. The product 1 is aligned with respect to the right plane of the conveyor before transport. Memory block 10 is built on shift registers. The number of shift registers in the memory block W is equal to the number of bits of the counter 9 pulses, and the number of bits in each register is equal to the number of positions of the conveyor from the place of installation of the illuminator 4 and the photodetector 3 to the place of packaging the products. The device works as follows. When the product 1 enters the measurement zone, the synchronization sensor 6 is triggered, which generates a signal in control unit 1 I. According to the signal from the synchronization sensor 6, the control unit 12 of the controller generates a control signal to the key 7 and the recording signal of the value L of the setpoint block 8 to the counter 9, where IS is the distance of the photodetector 3 to the right side of the conveyor belt, is the correction for this type of products . The signal from the 12 V control unit triggers the key 7 and the pulses from the sensor 5 pulses start to flow to the subtracting input of the counter 9 until product 1 does not intersect more efficiently (the optical axis of the photodetector 3 and the illuminator 4. When the product 1 crosses the optical the photodetector 3 and ocs axes (titel 4 photo receiver 3 generates a signal, which closes key 7, and control unit 2 generates a shift and lower signal for block 10 of the memory of the pulse counter 9. According to the offset signal from the block 12 content management start their bits of the memory unit 10 are rewritten into adder II, where the total length of the product package is calculated.If the measurement zone includes captures 2 without a divider, the counter 9 pulses counts until zeroed, after which the control unit 12 generates a jamming signal on key 7. Use in the device of the setting block and the memory block on the shift registers improves the accuracy of measuring the length of the package of products The invention The device for measuring the length of products on the conveyor, containing the illuminator and photodetector, the optical axis to which is oriented at an acute angle to the longitudinal axis of the product, a pulse sensor, the output of which is connected to the first key input, the second input of which is connected to the output of the photodetector, and a pulse counter, the counting input of which is connected to the output of the key, in order to increase measurement accuracy, it is equipped with a synchronization sensor, a setpoint block, a memory unit, an adder and a control unit, the outputs of the setpoint unit are connected to the installation inputs of a pulse counter, the outputs of which are connected to the input unit through the memory unit adder rows, the control unit inputs are connected to outputs of the photodetector and encoder sync pulse counter, and the outputs - to the input setting unit and a memory unit. Sources of information taken into account in the examination 1. USSR author's certificate number 357451, cl. G 01 B 7/04, 1971. 2. USSR author's certificate number 460434, cl. About 01 At 11/02. 1973 (prototype). Foz./ fa-g.