SU879467A2 - Device for contruction article quality control - Google Patents

Description

(54) DEVICE TO CONTROL THE QUALITY OF CONSTRUCTION

PRODUCTS

I

The invention relates to the means of controlling the quality of building products.

According to the main author. St. No. 711471, a device for quality control of building products is known, comprising size sensors, a switching unit, pneumatic cylinders, a control unit, a registering device, scanning units, a key, delay and comparison elements, ultrasonic sensors and base plates rigidly connected to pneumatic cylinders, and the sensors are rigidly fixed on the base plates and connected to the corresponding inputs of the switching unit, the first output of which is connected to the first key input, the second output of the switching unit is connected to the element input and a delay, the third output with the first input of the comparison element, the second input of which is connected to the output of the delay element, the output of the comparison element is connected to the input of the control unit, the outputs of which are connected to the second input of the key and to the inputs of the scanning blocks whose outputs are connected to pneumatic cylinders, and the key output is connected to the registering device j

However, in the known device, the accuracy of control is greatly influenced by both the magnitude of the measurement base and the magnitude of the pressing force of the ultrasonic sensors. This leads not only to a decrease in control accuracy, but also to poor reproducibility of results.

The aim of the invention is to improve the accuracy of control.

The goal is achieved by the fact that the device according to ed. St. No 711471 introduced oscillation amplitude measurement blocks, force magnitude measurement blocks and an analyzer, the key output connected to the analyzer input, the output of which is connected to a recording device, oscillation amplitude measuring blocks installed on the corresponding base plates and measuring units The forces are also located on the corresponding base plates and connected to the corresponding pneumatic cylinders. The drawing shows a block diagram of the device. The device for controlling the quality of building products contains supply and base units (not shown) of product 1 in the measurement position, sensors 2, 3, 4 and 5 sizes and ultrasonic sensors 6, 7, 8, and 9 mounted on the base plates 10, KOTOpFMx rigidly fixed blocks 11 measuring the amplitude of oscillations of sensors 2, 3, 4 and 5, 6, 7, 8 and 9,; .. pneumatic cylinders 12, blocks 13 measuring the magnitude of pressing force of ultrasonic sensors 6, 7, 8 and 9, scanning blocks 14, block 15 of control, comparing element 16, delay element 17, program switching block 18 , Electronic key 19, analyzer 20, and registering a 1 st device 21. The device works as follows. The item 1 to be monitored is fed to the measurement position and is based. Thereafter, a programmable parameter is selected by the program switching unit 18. The signal from the program switching unit 18 through the comparison element 16 and the control unit 15 is supplied to the scanning blocks 14 in which the control signal is generated by the pneumatic cylinders 12. This signal periodically switches the pneumatic cylinders 12 on and off, causing the base plates 10 to oscillate sensors 2.7 3, 4, 5, 6, 7, 8 and 9. Sensors of sizes 2,3, 4 and 5 and ultrasonic sensors 6, 7, 8 and 9 periodically come into contact with the surface of the test product 1 when they oscillate Element 16 compares the date signal The sensor selected by block 18 is compared in magnitude with the previous signal of the same sensor, but delayed in time. If these signals are distinguished from each other by an amount that exceeds a certain specified value

measurement errors, at the output of element 1655 taken into account in the examination of the comparison, a signal appears, which 1, USSR author's certificate goes to control unit 15 and further to scanning unit 14. Signals 8

Claims (1)

No. 711471, cl. G 01 N 33/38, 1977, (prototype). .4 scanning blocks 14 cause further oscillation of the base plates 10. The oscillation of the base plates 10 occurs until the previous sensor signal is practically the same as the next one. When this is achieved, no signal appears at the output of the reference element 16. In this case, control unit 15 provides a trip signal to scan units 14. The oscillation of the base plates 10 stops. Simultaneously, the output signal of the control unit 15 is fed to the control input of the electronic key 19. The latter opens and the output signal of the sensor selected by block 18 goes to the analyzer 20, which also receives signals from the measuring units of the amplitude of oscillation and pressing force of the sensors. In the 2Q analyzer, the incoming signals are processed and a signal appears at its output, which is proportional to the true value of the monitored parameter. The influence of the amplitude instability, oscillations of the sensors and their pressure on the measurement accuracy of the monitored parameter are compensated for in the analyzer. Thus, the introduction into the device of units for measuring the amplitude of oscillations of the sensors and the force of their pressing, as well as the analyzer, makes it possible to increase the accuracy of control. The invention The device for quality control i building products po aut. St. No. 711471, characterized in that, in order to improve the control accuracy, measurement amplitude amplitude blocks, force magnitude measurement blocks and an analyzer are entered, the key output is connected to the analyzer input, the output of which is connected to a recording device, vibration amplitude measurement blocks are set to corresponding base plates and connected to the corresponding inputs of the analyzer, and the force measurement units are also located on the corresponding base plates and connected to the corresponding pneumatic cylinder . Information sources. ten YU