RU6070U1 - DEVICE FOR MEASURING THE PARAMETERS OF PRELIMINARY STRESSED ELEMENTS OF REINFORCED CONCRETE STRUCTURES - Google Patents

Abstract

A device for measuring the parameters of prestressed reinforcing elements of reinforced concrete structures, containing an oscillation sensor connected to the input of the amplifier, the output of which is connected to the input of the rectifier and to the first input of the comparator, the other input of which is connected to the output of the rectifier, and the output of the comparator is connected to the first input of the counter, and also a decoder, indicator and AND element connected to the generator, characterized in that it is equipped with a reversible counter and a control and data processing unit containing processor, keyboard, read-only program memory (program ROM), random access memory (RAM) and arithmetic logic device (ALU), the first output of the counter connected to the second input of the element And, the output of which is connected to the first input of the reversible counter, the first output of the last connected to the first RAM input, the second output of the reversible counter is connected to the first input of the processor, the second, third, fourth and fifth inputs of which are connected respectively to the "Start" button, the second output of the counter, g with a keyboard and the first output of the keyboard, the sixth input of the processor is connected to the output of the ROM of the programs, the seventh to the second input of the RAM, the eighth to the first output of the ALU, the first and second inputs of which are connected respectively to the output of the ROM of the programs and the RAM output, and the second output of the ALU is connected to the input of the decoder, the output of which is connected to the indicator, while the first, second, third, fourth, fifth and sixth outputs of the processor are connected respectively to the second input of the counter, to the second and third inputs of the reversible counter, to the input of the ROM of programs, to

Description

DEVICE OF THE DAY OF MEASURING THE PARAMETERS OF EXTRA STRESSLY REINFORCED REINFORCED ELEMENTS OF REINFORCED CONCRETE STRUCTURES

The utility model relates to the field of non-destructive testing of technological processes in the construction industry and can be used to obtain data on the parameters of prestressed reinforcing elements (rods, ropes, etc.) in the manufacture of reinforced concrete structures, in particular, to determine the required elongation of the reinforcing element, measuring stresses in the reinforcing element and adjusting its length.

A device is known for monitoring the voltage in reinforcing elements, comprising a vibration sensor mounted on a reinforcing bar, a matching device, an amplifier, a controlled filter, two shapers, a counter, a frequency divider, a pulse generator, a comparator, a reference voltage source, and a data processing unit (see and .s, USSR No. 1507940 Device for monitoring the voltage of reinforcing elements in the production of reinforced concrete products, MKJI-4: E04Gr21 / 12, eg05D15 / 01, application 01.09.87, publ. I5.09.89r.).

This device allows you to measure the magnitude of the voltage in the reinforcing elements, not giving the opportunity to get recommendations for its adjustment when the deviation of this value from the design. This indicates the unsatisfactory MKD-6: 6-05D 15/01, E 04Gr 21/12.

credential functionality of the device and, as a consequence, low control performance.

Thus, a disadvantage of the described device is the low control performance due to the narrow functional range of the device.

Closest to the technical nature of the claimed technical solution is a device for measuring the voltage in the reinforcement of reinforced concrete structures, described in the eponymous ASSSSR f 1353878, MKI4: E046-21U12, e051) 15701, declared. Ob.0b.8bg., Publ. 11.23.87g. and selected as a prototype.

The known device contains an oscillation sensor connected to the input of the amplifier, the output of which is connected to the input of the rectifier and to the first input of the comparator, the other input of which is connected to the output of the rectifier, and the output of the comparator is connected to the first input of the counter, as well as a decoder, indicator and AND element, connected to the generator.

In addition, the device comprises a frequency divider, a digital filter, a digital code shaper, a switch, a threshold digital filter, an AND gate, a clock distributor, a multiplexer, and an interface unit.

The prototype has the same drawback as the counterpart of low control performance.

This is due to the same reasons - in the measurement process, this device allows you to creep only information about the magnitude of the voltage in the reinforcing element.

However, if this value deviates from the design value above the regulatory tolerance, when there is a need to change the length of the reinforcing element, the known device does not allow to obtain information on the magnitude of the correction, by which it is necessary to extend or shorten the reinforcing element to ensure the design value of the voltage in it. In this case, the operation to adjust the length of the reinforcing element is carried out empirically, which entails additional labor costs, and, consequently, a decrease in control performance.

The objective of the claimed utility model is to increase control performance.

The technical result that allows to solve the task is to expand the functionality of the device, by increasing the number of controlled parameters of reinforcing elements obtained in the course of one measurement cycle.

The problem is solved due to the fact that in the known device for measuring the parameters of prestressed reinforcing elements of reinforced concrete structures containing an oscillation sensor connected to the input of the amplifier, the output of which is connected to the input of the rectifier and to the first input of the comparator, the other input of which is connected to the output of the rectifier, and the output of the comparator is connected to the first input of the counter, as well as the decoder, indicator and the And element connected to the generator, unlike the prototype, the device is equipped with a reversible m counter and a control and data processing unit containing a processor, keyboard, read-only memory program (ROM program), random access memory (RAM) and arithmetic logic device (MU), and the first output of the counter is connected to the second input of element And, the output of which connected to the first input of the reverse counter, the first output of the last soy; connected to the first input of RAM, the second output of the reverse counter connected to the first input of the processor, the second, third, fourth and fifth inputs of which inens, respectively, with the START button, the second counter output, the generator and the first keyboard output, the sixth input of the processor is connected to the output of the ROM of the programs, the seventh to the second input of RAM, the eighth to the first output of the MU, the first and second inputs of which are connected respectively to the output of the ROM of the programs and RAM output, and the second output of the ALU is connected to the input of the decoder, the output of which is connected to the indicator, while the first, second, third, fourth, fifth and sixth outputs of the processor are connected respectively to the second input of the counter, to the second and third emu inputs of down counter, to the input of the program ROM to a third input of the ALU, the third input of the RAM, a fourth input coupled to a second input of the keyboard.

Studies conducted on the sources of scientific and technical information have shown that the proposed device is unknown and its circuit solution should not be

explicitly from the studied prior art, that is, meets the criterion of novelty.

This device can be used at the enterprises of the construction industry to monitor the parameters of prestressed reinforcing elements in the manufacture of reinforced concrete structures. The device can be manufactured using standard circuit elements of domestic or foreign production, and, therefore, meets the criterion of industrial applicability.

The proposed set of essential features informs the claimed device of new properties that allow solving the task - to significantly increase the performance of monitoring the magnitude of the prestressing of reinforcing elements,

The introduction of a reversible counter and a control and data processing unit into the device with their connection to other elements of the device circuit, as well as changing the connections and connections of other elements of the device, as indicated above, allows not only to determine the voltage value in the reinforcing element during one measurement cycle, but and, if necessary, to obtain information on additional parameters — the magnitude of the required elongation of the reinforcement and the magnitude of the deviation of the length of the armature element from the desired value.

The inventive device provides reliable information about how much and in what directions} need to change e / l-C e- / s

thread. the length of the tested reinforcing element to obtain the design value of the voltage in it, which allows you to quickly and accurately, i.e. with minimal labor, carry out an operation to adjust this parameter.

Thus, an increase in control performance is achieved by expanding the functionality of the device.

The inventive device is illustrated by drawings, in which: FIG. I is a block diagram of a device for

measuring parameters of prestressed reinforcing elements; FIG. 2 - the algorithm of the device when measuring stresses and determining the magnitude of the correction of the length of the reinforcing element; FIG. 3 - the algorithm of the device when

determining the required elongation of the reinforcing element.

A device for measuring the parameters of prestressed reinforcing elements (not shown) of reinforced concrete structures (see Fig. 1) contains an oscillation sensor I, an amplifier 2, a half-wave converter 3, a comparator 4, a counter 5, a generator 6, an And 7 element, a reversible counter 8, a data management and processing unit 9, a decoder 10 and an indicator P. A data management and processing unit 9 contains

a processor 12 with a keyboard 13, read-only memory program 14 (program ROM), random access memory 15 (RAM) and arithmetic logic device 16 (ALU).

The oscillation sensor I, amplifier 2, comparator 4, counter 5 are connected in series. In the rectifier 3 is connected between the amplifier 2 and the comparator 4.

The first output of the counter 5 is connected to the second input of the element And 7, the first input of which is connected to the output of the generator 6, and the output of the element And 7 is connected to the first input of the reversible counter 8, the first output of the latter is connected to the first input of RAM 15.

The inputs of the processor 12 are connected respectively: the first to the second output of the reverse counter 8, the second to the Start button, the third to the second output of the counter 5, the fourth to the output of the generator b, the fifth to the first output of the keyboard 13, and the fifth to the output of the ROM 14 programs , the seventh - to the second input of RAM 15, the eighth to the first output of ALU 16.

The outputs of the processor 12 are connected respectively: the first to the second input of the counter 5, the second and third to the second and third inputs of the reverse counter 8, the fourth to the input of the ROM 14 program, the fifth to the third input of the ALU 16, the sixth to the third input of RAM 15.

The first and second inputs of ALU 16 are connected respectively to the output of ROM 14 programs and the output of RAM 15, and the second output of ALU 16 is connected to the input of decoder 10,; f

whose output is connected to indicator II.

The second output of the keyboard 13 is connected to the fourth input of RAM 15.

Due to the presence of a large number of inputs and outputs of the units of the device and to facilitate understanding of its operation, in the drawing (Fig. 1), the inputs and outputs of the individual elements of the device are independently numbered.

The purpose of the blocks, which is included in the circuit diagram of a device for measuring the parameters of reinforcing elements of reinforced concrete structures, is traditionally and the proposed device can be implemented on a standard element base.

Description of the operation of the device.

The device operates on the principle of counting pulses of a stable frequency, filling one or more periods of oscillation of the valve. Initially, from the keyboard, the values of the length of the controlled reinforcing element L-, its diameter, the voltage in the reinforcing element specified by the project, and the strength class of the reinforcement are entered into RAM J5 of the device (see figure 2).

Upon completion of the input of the valve parameter values, output from the keyboard I input 13 to the input 5 of the processor 12 receives a signal, after which the output from the output of the processor 12 to the ROM 14 of the programs receives a command to enter into the ALU 16 formulas for calculating the digital code Simultaneously from the output of the processor 12 to the RAM 15 input command

in ALU there are 16 values - and g / -.

 /

ALU J6 calculates a digital code using

the formula:,; / and - -,

T-.

where: / 1 - digital code corresponding to the frequency

vibrations of reinforcement having voltage

(- the free length of the reinforcement between the stops of the form or stand (not shown in the drawing);

/ C - the number of periods of oscillations counted by the counter 5;

 - diameter of the controlled reinforcing element;

j- is the frequency of the generator 6;

(- voltage in the reinforcement specified

 project (working drawings for the product).

The value obtained after calculation in ALU 16 is fed to input 8 of processor 12, after which processor 12 requests the frequency ranges of the device in ROM 14 of the program and sequentially compares the boundaries

bf

these ranges and. with the value m obtained from ALU J6 until

the condition will be met, C - - pppp The range selected by the way,, its boundaries, on command from the output of processor 6, RAM J5 is stored.

-7

The boundaries of the ranges of the device are selected so that the upper limit of / / ia-xi is less than three times the lower limit of the range of ku (.i) (H i.e., the condition ,, - / и, у /

After all the necessary information from the keyboard 13 is entered into the RAM 15, shock or pinch excitation of vibrations in the controlled reinforcing element is carried out. Then they bring the sensor I to it and press the Start button,

In this case, the signal from the outputs I and 2 of the processor 12 is set to the initial state, respectively, of the counter 5 and the reverse counter 8.

Sensing I, perceiving the vibrations of the reinforcing element, generates a signal that goes to rectifier 2, The inputs of the comparator 4 receive signals from rectifier 3 and amplifier 2, At the moment of the coincidence of the amplitudes of these signals, co-oscillator 4 is triggered, forming a signal arriving at counter 5, which produces two consecutive counts of td periods of oscillation of the reinforcement.

After the counting of the first kS periods of the oscillations of the valve, the signal from the output of the counter 5 through the And 7 element is fed to the reversible counter 8, At the same time, through the And 7 element, the pulses of the reference frequency j- from the generator 6 are fed to the reversible counter 8, The signal from the generator 6 is also fed to input 4 processor 12, where the clock frequency of the entire device.

The reversible counter 8 counts the kolg / number of i-pulses of the reference frequency. during the first ic periods of the armature oscillation, then from the output 2 of the reverse counter 8 to the input I of the processor 12, a signal about the end of the count. Then from the output I of the processor 12 to the counter 5 receives a signal that sets it to its original state. Simultaneously with the output of the processor 12 in RAM 15 post; a command is sent to store the digital code of the counted reverse counter 8, and from output 3 of the processor 12 to the reverse counter 8 a command is sent to reverse the count,

The run counter 5 counts down. Reads the subsequent / C-periods of the fluctuation of the reinforcement. The signal from its output enters through the And 7 element to a reversible counter 8, which subtracts from the number of pulses counted during the passage of the first DG periods of the armature oscillations, the impulses of the reference frequency /, it is simpler. Through the And 7 element for subsequent periods of armature oscillation, Takgol In this way, the accuracy of the coincidence of the digital codes of the first () and the last one (,) measurements is determined,

After counting down by the counter for 5 subsequent 11х / С-periods of oscillation of the valve, from its output 2 to input 3 of processor 12 a signal is received about the end of the count. In this case, the signal from the output I of the processor 12 counter 5 is set to its original state and its operation is blocked.

0, at the same time from the output 2 of the reverse counter 8 to the input I of the processor 12 receives information about the accuracy

- //

coincidence of the digital codecs of the first and subsequent measurements (i (after which the signal from the output of processor 2 12 reverses counter 8 is set to its original state. If the digital codes And do not coincide with the degree of accuracy specified by processor 12, the measurement cycle automatically repeats.

If this requirement is met, from the output b of the processor 12, the RAM 15 receives a command to enter into the processor 12 the values of the digital code and measured by the device. After that, the processor 12 compares this digital code / -k with the digital codes that are boundary for the selected range, and If the measured value of the digital code | f is outside the selected range, i.e. / - (or (4-J and .i (i ..-, then the processor 12 starts up counter 5 and the reverse counter 8 again and the measurement cycle is repeated up to three times.

If, as a result of all three measurements, the digital code AND measured by the device is always outside the selected range, then the processor 12 again outputs 4 borders of the frequency ranges from the ROM 14 and, sequentially comparing them with the rendered value i / i, selects the neighboring range in the same way to

the condition was met. . and (,.,

and sets new boundaries for the w-band ... L t i

U- /

.,

Then, from the output of processor 12, RAM 35 receives a command to reset the recorded value (L, after which processor 12 starts counters 5 and 8, and the cycle

".

/ and (If

rl: f;

measurement is repeated.

If the measured value of AND is within the previously selected range, i.e. , /

then from the output 4 of the processor 12 to the ROM 14 the program receives a command to enter in. Ш 16 fordpd - the voltage counts in the armature, and in the RAM 15 from the output b of the processor 12 a command to enter the RLU 16 values - / -t and ti , and in the processor 12 - the values of the class of reinforcement.

The processor 12 selects the modularity pool from the program written in ROM 14 for program 1 matching the elastic modulus to the reinforcement class and gives the output 4 command to enter its value from ROM 14 program in ALU 16, after which the command is sent from output 5 of processor 12 to AI 16 to calculate the voltage (e in the reinforcement.

ALU 16 calculates the voltage in the reinforcement according to the well-known Fotesh / le:

x / tCi / r / V E, k: .- / g (2)

ti- / 773 tv / 7 /. 3

where: J. - th t / - / values given in the explanation of the formula (I);

 - modulus of elasticity of reinforced steel. - digital code corresponding to frequency

oscillations of the reinforcement smoldering voltage (3. Then, the calculated voltage value “SG in the armature is remembered by ALU 16 and is displayed on indicator II through the decoder 10.

If the voltage measured by the device (Y in the reinforcement is different from the voltage G 5 specified by the design, this means that one measure is required to adjust the length of the c-controlled reinforcing element, and therefore, it is necessary to calculate

the value of 2i t- by which TK it is necessary to lengthen 14 or shorten the reinforcing element to ensure design stresses G .:.

To obtain this information, press the ALy button (not shown in the drawing) of the keyboard 13. At the same time, from the output of 4 processors 12, the ROM 14 of the programs receives a command to enter into the ADU 16 formulas for calculating /: i With Kv ,. 5 and from the output 6 of the processor 12, the RAM 15 receives a command to enter values A and C c into Ajiy 1, and the valve class 12 into the processor 12. After that, the processor 12 selects the modulus of elasticity according to the table of correspondence mo, 1g - for the strength class of reinforcement recorded in the ROM 14 of the program, and gives the output 4 command to enter from the ROM 14 programs in ALU 16 values of the modulus of elasticity. Then, from the output 5 of processor 12 to ALU 16, a command is sent to calculate the correction value s- / s

the length of the reinforcing element.

ALU 13 performs the calculation of hLf according to the well-known formula:

di, lG- ((3)

where G is the voltage measured by the device:

armature;

t. - the value by which it is necessary to lengthen either; / to shorten the reinforcing element, i.e. adjust the distance to me; with temporary anchors (not shown in the drawing)

P

reinforcing element to provide

G O g

about t - values given in the explanation to

formulas (I) and (2).

Then, the calculated -iDiy J6 value // v through the decoder 10 is displayed on indicator II. The measurement cycle ends after the operator receives a command about the need to bring the voltage C5 in the reinforcing element in accordance with the overhang specified by the project, by lengthening or shortening the length of the reinforcing element.

In the mode of determining a given elongation of the reinforcing element l G, the device operates with a thin sb 1az (see Fig. 3). From the keyboard 13 in RAM 15, the input of the values of t, p, reinforcement class is performed. At the end of the input from the output I of the keyboard 13 to the input 5 of the process 12, the signal is sent, and then from the output 4 of the IZP I.

processor 12 in ROM 14 programs; a command is received to enter in AJD 16 the formula for calculating the specified elongation c, and from the output of processor 12 to RAM 15 post} T1 command is entered to input 16 values of p v into the I / L and enter 12 values of -t class of reinforcement into the processor 12. The processor 12 according to the correspondence tables recorded in ROM 14 programs, selects: the R. module of arugity according to the table of correspondence mo. f elasticity to reinforcement class., coefficient / according to the table of conformity of the thermoplastic properties of reinforcing steel to class / reinforcement depending on the magnitude of your design stress in arm 6

- (o-P

round, the maximum permissible deviation P of the value of the prestressing reinforcement (3 according to the table of its correspondence to the length L

After carrying out these operations, the processor 12 gives the command 4 to enter from the ROM 14 programs in the ALU 16 the values of the module E j ipjTocTH, the permissible deviated P prestress and coefficient K, after which the command 5 comes out from the processor 12 to the ALU 16

to calculate the specified elongation with (7 reinforcing element-ALU 16 performs the calculation of Lf according to the well-known jurmule:

l / s - - R f L ((4

where: 2h - the specified reinforcement reduction

item;

1C is a coefficient that takes into account the shrug-plastic properties of steel and is determined depending on the class of reinforcement and the value of design stresses: -keniy G in the reinforcement;

P is the maximum permissible deviation of the prestressing value G of the reinforcement from the design value, determined depending on the slab;

/ SG P - values, Povellennye in the waist t-,,. .

Scientific research institutes to formulas (I) and (2).

Then the calculated ALU 16 value with ty through the decoder 10 is selected: (it is displayed on indicator II.

The best practice of the Russian Federation with the fact that, for good luck,

change the length of the tested reinforcing element. to ensure the design value of the prestress in it, transfer to the corresponding leaning technological step to adjust the distance between the temporary anchors of this reinforcing element. This allows you to carry out {adann ps operation quickly, accurately and with minimal labor.

Thus, the claimed device for measuring the parameters of prestressed reinforcing elements of reinforced concrete structures, in comparison with the prototype, provides increased control performance by expanding ::: functional: device capabilities.

Director 00 Stroypro | SH / A A.Yu. Pypmintsev

Claims (1)

A device for measuring the parameters of prestressed reinforcing elements of reinforced concrete structures, containing an oscillation sensor connected to the input of the amplifier, the output of which is connected to the input of the rectifier and to the first input of the comparator, the other input of which is connected to the output of the rectifier, and the output of the comparator is connected to the first input of the counter, and also a decoder, indicator and AND element connected to the generator, characterized in that it is equipped with a reversible counter and a control and data processing unit containing processor, keyboard, read-only program memory (program ROM), random access memory (RAM) and arithmetic logic device (ALU), the first output of the counter connected to the second input of the element And, the output of which is connected to the first input of the reversible counter, the first output of the last connected to the first RAM input, the second output of the reversible counter connected to the first input of the processor, the second, third, fourth and fifth inputs of which are connected respectively to the Start button, the second output of the counter, g with a keyboard and the first output of the keyboard, the sixth input of the processor is connected to the output of the ROM of the programs, the seventh to the second input of the RAM, the eighth to the first output of the ALU, the first and second inputs of which are connected respectively to the output of the ROM of the programs and the RAM output, and the second output of the ALU is connected to the input of the decoder, the output of which is connected to the indicator, while the first, second, third, fourth, fifth and sixth outputs of the processor are connected respectively to the second input of the counter, to the second and third inputs of the reversible counter, to the input of the ROM of programs, to the fourth input of ALU, to the third input of RAM, the fourth input of which is connected to the second output of the keyboard.