SU1485154A1 - Device for measuring parameters of impact oscillatory process - Google Patents

Description

The invention relates to digital measuring systems and can be applied when measuring the parameters of shock pulses, in particular the duration

and the peak value of the minimum half-cycle of the oscillatory impulse that occurs when driving piles on the ground and structures. The aim of the invention is to provide rapid assessment of the minimum dynamic effects that occur when driving piles, by finding the duration of the half period corresponding to the minimum amplitude of the vibrational shock process. This goal is achieved through the use of output pulses of the meter 5 peak value to prohibit the reset of the meter 6 duration and the formation of commands to register the received data. In addition, the device contains a sensor 1, an amplifier 2, a control node 3, a detector 4, a generator 7, AND-NO elements 8.9,10,11,12, two decades of 13.14 peaks, an OR 15 element, triggers 16,17 decade 18,19,20 duration, node 2! coordination, node 22 data output, board 23, input 24 "Start". 2 Il.

1485154

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1485154

The invention relates to digital measuring systems and can be applied when measuring the parameters of shock pulses, in particular, the duration and peak value of the maximum half-cycle of the oscillating pulse that occurs when driving a pile on the ground and structures.

The aim of the invention is the operational assessment of the maximum dynamic effects that occur when driving piles, by finding the duration of the half period corresponding to the maximum amplitude of the vibrational shock process.

FIG. 1 shows a block diagram of the device; in fig. 2 - timing charts of the device.

The device consists of a sensor 1, an amplifier 2, a control unit 3, a detector 4, a peak meter 5, a meter 6 duration, an oscillator 7, AND-NO elements 8-12, a high count Decade 13 a peak meter, a lower counting decade 14 peak meter the values of the element OR 15, triggers 16 and 17 "Prohibition Reset" and "Increase", older, middle and younger counting d ^ cad 18-20 duration meter, matching unit 21, data output unit 22, board 23 and has an input 24 " Start".

Moreover, the output of the sensor 1 is connected to the input of the amplifier 2, the first output of which is connected to the first input of the control unit 3, and the second output is connected to the input of the detector 4 and To the signal first Input of the 6-meter duration. Detector output

4 is connected to the signal input of the meter 5 Peak value, the output of the generator 7 is connected to the second input of the meter

5 peak value and the second input of the control unit 3, the first output of which is connected to the second input of the meter 6 duration. Ob output of the meter 5 peak values are connected respectively to the counting inputs of the higher 13 and younger 14 decades of the peak meter and to the inputs element ^ OR 15, the output of which is connected to the control inputs of the triggers 16 and 17 “Prohibition Reset” and “Zoom”. The output of the meter 6 duration is connected to the serially connected younger 20, middle 19 and older 18 counting decade duration meter.

The output of the control unit 3 is connected ‘to the first input by the I-NE-10 elements, the output” of which is connected to the third input of the meter 5 Peak value. The third output of the control unit 3 is connected to the inputs “Reset” of the youngest 20 and average 19 decades of the duration meter. The fourth output of the control unit 3 is connected to the first input of the element AND NOT 12, the output of which is connected to the inputs

“Overwrite” of the youngest 20 and average 19 decades of the duration meter. The fifth output of the control unit 3 is connected to the “Reset” input of the senior decade 18 of the duration meter and to the second input of the trigger 17 “Zoom”. The sixth output of the control unit 3 is connected to the first input of the element AND-NOT 11, the output of which is connected to the “Overwrite” input of the senior decade of the duration meter. The seventh output of the control unit 3 is connected to the first input of the element IS-HE 9, the output of which is connected to the inputs “Reset” of the youngest 14, and the older 13 decade Peak Gauge. The eighth output of the control unit 3 is connected to the first input of the NAND element 8, the output of which is connected to the “Overwrite” inputs of the highest 13 and lower 14 decades of the peak meter and the control input of the matching unit 21.

The trigger output 16 "Reset inhibit" is connected to the second inputs of the AND-NOT 9 and HZ elements, and the trigger 17 output of the "Zoom" - to the second inputs of the AND-NE elements 8,11 and 12. Information from the outputs of the decades 13 and 14 of the peak meter and the decade · 18 · –20 of the duration meter arrives at the matching block 21, the output of which is connected to the segment board 23 and the control unit 22. Input 24 is connected to the second input of the trigger 16 and the third input of the block 3.

_ The device works as follows.

The operation of the device is illustrated by time diagrams (Fig. 2). From sensor 1, the signal goes to amplifier 2 and after amplification (Fig. 2a) is fed to control unit 3, detector 4 and duration meter 6. The detected signal from the detector 4 (Fig. 26) is fed to the peak meter 5. The pulses from the generator 7 are fed to the meter 5 peak value and the control unit 3. In block 3 of the control, the impulses of signal transition through “0” (Fig. 2b) are generated, which are the starting points for the implementation of the command to record the results of the measurement. ,. ·

With the appearance of this pulse in block 3, the commands “Sbrbs” and “Overwrite” are generated, which, depending on the status of the Trigger Prohibit, 16 and Increase 17 triggers, are sent to the Fourth Decades 13 and 14 of the pictograph value meter. and '18-20 Duration Meter.

The control unit 3 is the division of the oscillator frequency into three 1 7, _B = ZTS. The received pulses with a frequency of ί „ ₀ through ·: are given on the meter 6 duration (Fig. 2d). Registration impulses "Reset IP", "Reset ID" and "Overwrite" form 1485154

They are made of three pulses with a generator frequency. Therefore, the registration is carried out until the first filling pulse arrives at the duration meter, which does not introduce errors into the duration measurement.

FIG. 2 (dk) time scale in the registration interval is increased three times (to explain the formation of registration pulses).

Consider the operation of the device according to FIG. 2. With the triggering of the “Start” pulse, the “Reset inhibit” trigger 16 and the control unit 3 form the “Reset” command (Fig. 2 h, i) and the device circuit returns to its initial state. The first trigger pulse of the control unit 3 generates the “Reset” and “Overwrite” pulses, but since the pulses arriving at the counting decades 13 and 14 of the peak value meter are also fed to the OR 15 element, by the time of arrival of the registration pulses the trigger “Reset inhibit "16 and" Zoom "17 overturn (Fig. 2e, g), allowing overwriting and prohibiting the reset of the peak value meter and of the decades 13 and 14 (Fig. 2 h, and k). At the end of the half cycle, with the arrival of a new start pulse, a new registration command is carried out.

By this time (Fig. 2e, g) the Trigger Prohibit 16 and Zoom 17 triggers are overturned. Information is rewritten from decades 13, 14, and 18-20 (Fig. 2k), and a reset occurs only in the decades of 18-20 measures of the duration and trigger 17 “Increase” (Fig. 2c).

At the end of the second half period b, only the decade 18–20 is reset, there is no rewriting, since the amplitude of the second is less than the amplitude of the first: half period and ₂ <and, and the trigger 17 is not overturned (Fig. 2). At the end of the third half period 1 ₃ , overwriting takes place from decades 13, 14 and 18–20, as the Zoom trigger 17 overturns (Fig. 2g), E, s> and |, and the decade 18-20 reset of the duration meter and trigger “ Increase "(fig. 2m). Further, the signal amplitude decreases and there is no new rewriting; as a result, the amplitude T_1z and the duration 1, h are recorded on the segment display.

Pr ₍ and shorting the trigger input to the trigger trigger input 16), all values are recorded without finding the Maximum and the corresponding duration (Εΐι –– ίι, υ ₂ = ₂ , Е1з = 1з, and ₄ =, and so on. d.)

Claims (1)

Claim A device for measuring the parameters of a shock oscillation process containing a sensor connected in series, an amplifier whose first output is connected to the first input of a duration meter, and a second output to the first input of a control unit, a peak value meter, both of which are connected to the first inputs of the high and low counting decades the peak meter, and the output of the duration meter is connected to the first input of the lower counting decade of the duration meter, the first output of which is connected to the first input ohm of the average counting decade of the duration meter, the first output of which is connected to the first input of the highest counting decade of the duration meter, while the second, third, fourth, fifth outputs of the high and low counting decades of the peak meter, the highest average and the smallest counting decades of the duration meter are connected to the inputs of the matching unit, one output of which is connected to the segment board and the other to the input of the data output unit, characterized in that, in order to promptly estimate the maximum dynamic impact, arising during pile driving, by finding the half-period duration corresponding to the maximum amplitude of the vibrational shock process, five I-NOT elements, a detector, a generator, an OR element, a “Prohibition Reset” trigger, and an “Zoom” trigger are entered into it, and the generator output is connected to the second input of the control unit and the third input of the peak value meter, both outputs of which are connected to the inputs of the OR element, the output of which is connected to one input of the “Reset inhibit” trigger and one input of the Zoom trigger, you one of which is connected to the second inputs of the first, fourth and fifth elements of the NAND, and the output of the Inhibit Reset trigger is connected to the second inputs of the second and third elements of the NAND, the input of the detector is connected to the first output of the amplifier, and the output to the second input of the meter the peak value, the first output of the control unit is connected to the second input of the duration meter, the second output is connected to the first input of the third NAND element, the output of which is connected to the First input of the peak value meter, the third output is connected to the second inputs It and the younger counting decades of the duration meter, the fourth output is connected to the first input of the fifth NAND element, the output of which is connected to the third inputs of the middle and lower counting decades of the duration meter, the fifth output is connected to the second inputs of the higher counting decade of the duration meter and trigger “Zoom” , the sixth output is connected to the first input of the fourth NAND element, the output of which is connected to tre7 1485154 eight the third input of the highest counting decade of the duration meter, the seventh output is connected to the first input of the second NAND element, the output of which is connected to the second inputs of the high and low counting 5 decades of the peak value meter, the eighth output is connected to the first input of the first of the NAND element, the output of which is connected to the third inputs of the high and low counting decades of the peak value meter and one input of the matching unit, and the second input of the Reset Disable trigger is connected to the third input of the control unit and the Start input.