JPS60141960A - Optimum control apparatus of vibrator apparatus for compacting concrete - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention]

This invention relates to an optimal control device for a vibrator device for concrete compaction. To obtain a high-quality finish when compacting concrete, vibration work is required. For ready-mixed concrete with different slump values, selecting the optimum combination of vibration period, vibration amplitude, and excitation time according to the slump value will increase the excitation effect and produce a higher quality finish. can get. In order to deal with this, the applicant has previously filed Japanese Patent Application Nos. 58-137746 and 5L-142513.
As disclosed in the issue, he invented [Conc IJ-1 - vibrator device for compaction] and “control circuit for pipe rake device for compaction of concrete”. This concrete compaction vibrator device 1 will be explained with reference to Fig. 1. In the figure, reference numeral (1) is an outer shell body formed in a bottomed cylindrical shape, and a conical surface (1a) is formed on the lower part of the inner peripheral surface. It is formed. U is an amplitude control device in which a solenoid SoL is housed in a cylindrical case body (2), and a variable length shaft (3) equipped with a magnetic body part (3a) is removably fitted into this solenoid SOL. . The variable length shaft (3) is always inclined to be inserted into the case body (2) by the elasticity of the coil spring (4). An amplitude control voltage is supplied to the solenoid SOL from the outside through a cable 1.22. A support shaft (5) is protruded from the upper part of the case body (2), and this support shaft (5)
The amplitude control device U1 is suspended in the outer shell (1) by a ball joint (6) provided in the outer shell (1). M is a three-phase AC induction motor, and the output shaft (force is directed downward) is attached to the lower end of the variable length shaft (3). The vertical position is variable within the shell (1).This AC induction motor M rotates at a rotation speed that corresponds to the frequency of the electric power supplied from the outside through the cable Z314T5, and generates torque that corresponds to the voltage value. (8) is a slider, which is attached to the output shaft (7) and rotates and slides on the conical surface (1a) at a variably set height position.(8a) is a ball bearing. The amount of protrusion of the variable length shaft (3) is determined according to the voltage value supplied through the cable 7, t2, and the slider (8)
) is variably set at a height position lowered by a required amount on the conical surface (1a), as shown by the imaginary line in the figure. Slider (8)
rotates and slides the conical surface (13) at this set height position by driving the electric motor M. The rotation and sliding of this slider (8) drives the outer shell (1) from inside, and the entire pipe rake device V makes a conical motion (misosuri motion) with the isometric center of gravity position as the center of motion. . The amplitude (eccentricity) of the conical motion at this time is determined by the height position of the slider (8) set by the amplitude control device U, the torque of the AC induction motor M, that is, the voltage value of the power supplied to it, etc. be done. 'Also, the vibration period of the AC induction motor M
It is defined by the rotational speed of the motor, that is, the frequency of the supplied power. Furthermore, as a third control device that controls the vibration amplitude and vibration period to optimal values, an optimal set of period designation data, torque designation data, and amplitude designation data according to the slump value of the ready-mixed concrete to be used is used. It is equipped with an optimum combination setting function circuit that outputs alignment data, and is provided with a slump value input means that inputs a setting signal corresponding to the slump value. This is for inputting a setting signal corresponding to the slump value of the ready-mixed concrete to be used. A 3-circuit, 8-contact interlocking rotary switch is used, and the slump value can be set and input in multiple steps at 2 cm intervals. As described above, the invention related to the earlier application was to know the slump value of the fresh concrete used during work in advance, and to set and input the value of the stage corresponding to this slump value. This is related to the improvement of the setting signal input section to the optimum combination setting function circuit, and it is possible to check how deep the vibrator device is inserted into the fresh concrete of which slump value during compaction work. It is an object of the present invention to provide an optimal control device for a vibrator device for concrete compaction, which can automatically detect and set the vibrator device to an optimal vibration state in real time based on the detection result.Hereinafter, this invention will be described. will be explained based on the drawings. This invention has been made based on the following considerations. Set the protrusion amount to the maximum flame, and move the vibrator device V to the center point (
When supported in a gravitational field space with 6a) as a fulcrum (
We will consider the operational "behavior" when driving the electric motor M in the case of FIG. 2) and the case of fixing it in a gravitational field (FIG. 3). When supported in the gravitational field space shown in Figure 2, the outer shell (1
This is a case where the weight of motor M is assumed to be zero and the moment of motor M relative to the output shaft (7) is balanced. In this case, the axis A-A' connecting the output shaft (7), the variable length shaft (3), the center point (6a) of the ball joint, etc. remains unchanged, and the lower end of the outer shell (1) is connected to the ball joint. center point (6a
) is the fulcrum and performs a "misosuri motion" of amplitude B. On the other hand, the case where the vibrator device V is fixed in a gravitational field as shown in FIG. 3 is a case where the vibrator device V is fixed vertically on the ground and the weight of the outer shell (1) is assumed to be infinite. In this case, the central axis c-c' of the outer shell (1) remains unchanged, and the axis A-A' makes a ``striking'' movement with an amplitude at its lower end.However, in reality, the above-mentioned The weight of the outer shell (11) is zero, or it is impossible to fix it on the ground.
When A is supported and driven in a gravitational field, the fulcrum is A, which is below the center point (6a) of the ball joint and has a point (isometric center of gravity) where the vertical moments are balanced.
- Both the A' axis and the c-c' axis perform a "misobh movement" with a certain amplitude ratio.This is the case when the vibrator device V is in a no-load driving state, and the output torque required of the electric motor M is On the other hand, in the case of Figure 3, when the entire outer shell (11) is inserted into a large amount of fresh concrete with a very small (hard) slump value, the current value is also the minimum. , is a state very similar to this. Therefore, in this case, the state is equivalent to the state where the maximum load is applied to the vibrator device V, and the output torque required of the electric motor M is the maximum, and its current value Looking at the above operation from another perspective, when the vibrator device V is driven with the protrusion length of the variable length shaft (3) constant,
The electric power required for the electric motor M is the same as that of this vibrator device V.
The minimum value is when suspended in the space of the gravitational field, and the maximum is when it is fixed perpendicular to the gravitational field. The electric power Pm required for this electric motor M is the frequency f of that electric power.
If m and voltage Vm are constant, Pm = Vnt-1m (2), which is proportional to the first power of current Im. On the other hand, when the vibrator device V is driven, the vibration energy pb released to the outside is determined by the equivalent (motion) moment mass Kb of the vibrator device, the square of its equivalent vibration amplitude Db, and its It is proportional to three types of quantities: the square of the vibration frequency fb. And these three types of quantities Kb, D
Of b and fb, the first two quantities Kb and Db depend on what state the pie-break device V is in (in space, how deep it is inserted into fresh concrete, what its slump value is, etc.) ) is an amount that changes depending on whether The vibrator device V emits the vibration energy pb to the outside within the range of the friendly energy (electric crab Pm) supplied to the electric motor M. In other words, when driving the vibrator device, the electric motor M
The frequency and voltage of power Pm supplied to are constant,
Even if the protruding length of the variable length shaft (3) is constant, depending on the load state of the vibrator device V,
The value of the current In flowing through the electric motor M changes. 0; Consideration of the 'behavior' of the vibrator device in fresh concrete Figures 4 (3) to (Gl) schematically show the 'behavior' of the vibrator device in fresh concrete. In the figure (Jij ( i=o~3, j=0~2) is the vibration amplitude value at the upper end when the vibrator device performs the "Pamisosuri motion" with the equivalent center of gravity position as the fulcrum.Dij
The vibrator device uses the equivalent center of gravity as the fulcrum.
This is the vibration amplitude value at the lower end when performing the writhing motion. Figure (5) shows that when the vibrator device is vibrated in space, the same figure (Bl (C) and (D) shows that the slump value of the fresh concrete to which vibration is applied is large (soft).
In this case, the same figure (El (F) (Gl) shows the case where the slump value of the fresh concrete to which vibration is applied is small (hard).Furthermore, the same figure fBl (E) shows the case where the vibrator device is applied to the fresh concrete with a small (hard) slump value. If the entire vibrator device is inserted into the fresh concrete, if the entire vibrator device is inserted into the fresh concrete, (Fl is the same as the above (C)).
B) This is an insertion state between (E) and (1)) (G). When the pipe rake device is set to different load conditions based on the "behavior" shown in each of the figures in FIG. 4 (3) to (G) above,
For each different load state, the equivalent center of gravity position changes, and accordingly, both vibration amplitude values Ui on the upper end side and the lower end side
It can be seen that the absolute value of j Dij and the ratio between the two change. Therefore, the consideration of each movement shown in FIGS. 4(A) to (Gl) above, the protruding length of the variable length shaft (3) in the vibrator device, the voltage Vm applied to the electric motor M, the current Im, and the frequency fm can be understood. , and furthermore, if both the vibration amplitude values Uij and Dij on the upper end side and the lower end side are known, it is possible to specify how deep the vibrator device is inserted into the fresh concrete of which slump value. Various analytical methods can be used for identification, but one example is to actually measure (+l) of K2 under various conditions and convert the results into a numerical table. and Fig. 6 are diagrams showing an embodiment of the present invention based on the above-mentioned concept.In Fig. 5, the same or equivalent parts as the devices or members in Fig. First, to explain the configuration, in the present invention, a lower sensor aυ is provided near the lower end in the outer shell (1) of the vibrator device V to detect the vibration amplitude on the lower end side. is equipped, and an upper sensor for detecting the vibration amplitude on the upper end is installed near the upper end.An acceleration sensor is used as the lower and upper sensors αη021, for example.F is the optimum combination setting. The functional circuit E is a power supply for driving the electric motor.The optimum combination setting functional circuit F is configured to receive vibration amplitude values from both the lower end side and the upper end side from the lower sensor (11) and the upper sensor 02, and the vibration amplitude values applied to the electric motor M. The slump value of the fresh concrete and the insertion depth of the outer shell are determined from the voltage, current, and frequency of the concrete, and based on this specification, cycle specification data, torque specification data, and amplitude suitable for the compaction of the fresh concrete are determined. Optimum combination data consisting of specified data and excitation time data is output.In this embodiment, a numerical storage format is applied as an algorithm for specifying slump values and determining the optimal combination data. In order to perform this, the setting function circuit F is configured as shown in Fig. 6. That is, first, the slump value of fresh concrete and the outer shell (
In order to specify the insertion depth of 1), a read-only memory +) ROM+ (hereinafter simply referred to as ROM) for specifying the slump value and a ROM2 for specifying the outer shell insertion depth are installed in parallel. . Both memo IJ ROM and ROM2 have a storage function of, for example, 8 bits x 128 words, similar to the memory for storing each optimum data described later, and their address designation input terminals have the following various data storage functions. The signal line is connected. That is, the current meter feeding the electric motor M (

[Power supply from 1J flow data signal line t6. and each amplitude value signal output line t7 t8 from the sensor O2 and the lower sensor aυ
are commonly connected in parallel to both memories ROM and ROM2 via A/D converters A/DI A/D2A/D3, respectively. Also, a periodic data output line t9 and a voltage data output line t1 from each memory for optimal data storage, which will be described below.
o is both notes as above! Commonly connected in parallel to J ROM+ROM. The following data are written in advance in the memo IJ ROM and ROM2. That is, the vibrator device V is inserted at various depths into fresh concrete having different slump values, and the vibrating work is actually performed. The voltage Vm applied to the motor M at that time is
s % flow 1m, frequency fm, and the resulting vibration amplitude values on the lower end side and upper end side from the lower sensor aυ and the upper sensor (l). Organize these results and apply them to the electric motor M. The relationship between the voltage value, vibration amplitude value, slump value, and the insertion depth of the outer shell is evaluated.
Get it frugally. Next, each of this data is stored in the memories ROM and ROM2 in the form of a numerical table. This stored data in the form of a numerical table is searched by the address designation signal input from signal lines t6 to right 0, and the data of the slump value of fresh concrete during compaction and the insertion depth of the outer shell are output at the same time. Ru. Next, a section for outputting optimum combination data suitable for compacting the fresh concrete from each data such as the slump value and the insertion depth of the shell body specified as above will be explained. This part includes ROMg for storing optimal cycle data,
A ROM4 for storing optimum torque data, a ROM6 for storing optimum amplitude data (jQM61) and a ROM6 for storing optimum excitation time data are arranged in parallel.The addressing input terminals of these memories are as follows:
Each memo for specifying slump value and outer shell insertion depth',) Each output line from ROM, ROM2, and connection'
A total of three signal lines, including the signal line from the elapsed time data input terminal 0, are commonly connected in parallel. Elapsed time data until pouring is data on the elapsed time from pouring of the lower level concrete to the pouring work when pouring fresh concrete in multiple stages. , this time data is also used as an element to identify the optimal combination of data. Output terminals of each memory ROM3 and ROM4 for storing optimum cycle data and i & appropriate torque data. ~D7 are led to a variable frequency DC/AC converter circuit U3 and a variable output voltage rectifier circuit U2 in the motor drive power source E via D/A converters D/AID/A2, respectively. Furthermore, the output terminals DO to D7 of the ROM 5 for storing optimum amplitude data are connected to a LOONID drive device consisting of a D/A converter D/A, a power amplifier, etc. + times M (151
e to the solenoid SQL in the amplitude control device U. Furthermore, R for storing the optimum excitation time data is
Output terminals DO to D7 of OM6 are connected to optimum vibration time transmitting means U9. tf6 Each of the following data is written in each of the above-mentioned memories ROM3 to ROM6 in advance. νIJchi, 1
For various values of the slump value of the fresh concrete to be used, the vibrator device V was inserted at various depths, and in the case of pouring method, various elapsed times until pouring were added. Actual concrete pouring. The results are then organized to empirically obtain data on the combination of vibration period, vibration torque, vibration amplitude, and vibration excitation time that provides the best compaction effect. Next, each of these data is stored in each memo in the form of a numerical table l) ROM3 to ROM
6 to be memorized. The stored data in the form of a numerical table is searched using addressing signals such as the specified slump value and the depth of insertion of the outer shell, and the optimal combination data including vibration period data and the like is read out at the same time. C0NVI C0N in optimum vibration time transmission means U4
V2 is BCD-7 segment display converter, DPI D
P2 each has a 7-segment numerical display element and displays a 2-digit numerical value. Output voltage variable rectifier circuit U2 in motor drive power source E
This rectifies AC power from a commercial AC power supply or the like to obtain DC power of a voltage value corresponding to the torque specification data from the optimum combination setting function circuit F. In addition, the frequency variable DC/AC conversion circuit υ3 converts the DC output power from the output voltage variable rectifier circuit U2 into AC power with a voltage corresponding to the voltage value of this DC output power, and also sets the frequency to an optimal setting. It has a function of setting the value corresponding to the period designation data from the adjustment setting function circuit F and sending this value as the driving power of the AC induction motor M in the vibrator device V. Note that both the above-mentioned output voltage variable rectifier circuit U2 and frequency variable DC/AC converter circuit U3 are similar to those in the invention disclosed in Japanese Patent Application No. 58-85677 filed by the present applicant. Therefore, the detailed configuration of the circuit will be omitted. Next, the effect will be explained. A case will be described in which the compaction device is used as a compaction device in a conventional one-stage compaction method. The vibrator device V is inserted to an appropriate depth into the concrete poured into the formwork. At the beginning of the work, each memory ROM3 ROM4 RO in the output part of the optimum combination data is
By inputting an address designation signal of an appropriate value to Mg, a voltage of an appropriate value is applied from the motor drive power supply E to the electric motor 4JIJM.
It supplies electric power consisting of current and frequency, and also supplies a voltage of an appropriate value to solenoid SQL in amplitude control device U1. As a result, each vibration amplitude output on the lower end side and the upper end side from the lower sensor αυ and the upper sensor a side is %A/
D2 and A/D, respectively, via the converter and the feed current value from the feed ammeter ([31] via the A/Dl converter, both memories ROMI for determining the slump value and the shell insertion depth. Input to ROM2, and in parallel with this, each data of the voltage and period feeding the electric motor M is sent to both memos via the signal line AQtle.
Input to OMg. By such address designation input, the slump value data of the fresh concrete is specified from the ROM, and the insertion depth data of the outer shell is specified and output from the ROM2. Next, both of the identified data are stored in each memo 1 in the optimal combination data output section.
7 Commonly input in parallel to ROM3 to ROM6. By specifying this address, the optimum cycle data corresponding to the slump value is obtained from ROM3, the optimum torque data is obtained from ROM4, the optimum shaking amount data is obtained from ROM, and the optimum excitation time data is simultaneously obtained from ROM6. Read out. Of the data read out in this way, the optimum cycle data and the optimum torque data correspond to each other.
The signals are converted into analog level signals and sent to the motor drive power source E via the A converters D/A and D/A2, respectively. In addition, the optimum amplitude amount data is converted into an analog signal of a required level via the D-A converter D/A3, and is sent to the solenoid S in the section width control device U via the solenoid drive circuit OQ.
Supplied to QL. Further, the optimum excitation time data is led to the optimum excitation time transmitting means U4, and the optimum excitation time is displayed on numerical display elements DP, DP. Three-phase AC power having a voltage value corresponding to the optimum torque data and a frequency value corresponding to the optimum cycle designation data is sent from the electric motor drive power source E to the AC induction motor M. The specification of the slump value and the shell insertion depth, and the setting of optimal combination data based on this specification, are executed in real time during the compaction operation. As a result, the vibrator device V automatically vibrates in the fresh concrete at the optimum vibration frequency and vibration amplitude corresponding to the slump value of the fresh concrete. Therefore, if the operator operates the vibrator device V for the optimum excitation time displayed on the numerical display elements DP and DP2, the fresh concrete will be effectively poured with the highest strength and highest quality that can be obtained at that slump value. It can be solidified. In the above-mentioned embodiment, the optimum combination setting function circuit F uses a numerical storage format as an algorithm for both specifying the slump value and determining the optimum combination data based on this. Not limited to algorithms. To specify the slump value, etc., the relationship between the slump value, the insertion depth of the outer shell, and the value of KI K2 of the above formula is executed under various conditions, and based on the data obtained as a result of this execution. We created an empirical formula for the relationship between the two, and in order to determine the optimal combination data, we calculated the optimal vibration period and vibration amplitude obtained by running under various conditions regarding the slump value and the insertion depth of the outer shell. Create empirical formulas based on each data of the time and addition time, substitute each input data into these experimental formulas, calculate this using microcomputer technology, specify the slump value, etc., and find the optimal It can also be done by applying an algorithm in the form of an empirical formula to determine the combination of data. As detailed above, according to the present invention, the pipe rake device is equipped with the above-mentioned sensor and the lower sensor that detect the vibration amplitudes of the upper end side and the lower end side, respectively, and the vibration amplitude values of both vibration amplitudes and the vibration amplitudes applied to the electric motor are The slump value of the fresh concrete and the insertion depth of the outer shell are determined from the voltage, current, and frequency of the concrete. A motor drive power supply is provided with a matching setting function circuit, and outputs power having a frequency and voltage value corresponding to the optimum combination data to the motor, and a DC voltage corresponding to the optimum combination data. Equipped with a solenoid drive circuit that outputs output to the solenoid in the amplitude control device, it is possible to automatically determine how deep the pipe rake device is inserted into fresh concrete at any slump value during compaction work. Based on this detection result, the pipe rake device can be set to the optimum vibration state in real time. Therefore, the effect is obtained that fresh concrete can be compacted extremely efficiently with the highest strength and highest quality that can be obtained at its slump value.

[Brief explanation of drawings]

FIG. 1 is a partially sectional side view showing an example of a vibrator device which is a controlled object of the optimum control device for a pipe rake device for concrete compaction according to the present invention, and FIGS. 2 and 3 show the operation of the same vibrator device. Partly omitted and partially cutaway side view to explain the behavior of the
FIG. 5 is a side view schematically showing the behavior of the vibrator device in fresh concrete; FIG. FIG. 6, which is shown with a partial cross-sectional side view, is a block diagram showing the optimum combination setting function circuit in the above embodiment. 1: Outer shell 1a: Conical surface 3: Variable length axis 4: Coil spring 6: Ball joint 7: Output shaft 8: Slider 11: Lower sensor 12: Upper sensor 13: Power supply ammeter 15: Solenoid drive circuit A/D, ~A/D, + D-A conversion circuit D/A1~D
/A3: D A conversion circuit E: Motor drive power supply F: Optimal combination setting function circuit M: AC induction motor ROM1-ROM6: Read-only memory SQL
: Solenoid Ux: Amplitude control device U2: Output voltage variable rectifier circuit U3: Frequency variable IH flow/AC conversion circuit V: Viprator device Osaki Construction Co., Ltd. Village 1) Yutaka representative Naoe Ashida No. 11" Figure 2 Figure 3 r U(X) Fig. 4 DII D12 D21 D22 D31 D32

Claims (1)

[Claims] A ball joint comprising a bottomed cylindrical outer shell whose lower circumferential surface is formed into a conical surface and which is inserted into fresh concrete, and a variable length shaft that can be freely inserted into and removed from a solenoid. an amplitude control device suspended inside the outer shell body at a point, and an amplitude control device suspended inside the outer shell body in a variable vertical position via the amplitude control device with the output shaft facing downward, and rotates in accordance with the frequency of applied power. and a slider that is attached to the output shaft and rotates and slides at a variably set height position on the conical surface, and is driven by the slider. An optimal control device for a vibrator device in which the outer shell moves in a conical manner, comprising: an upper sensor installed near an upper end of the outer shell to detect vibration amplitude on an upper end side of the outer shell; A lower sensor is installed near the lower end of the shell body and detects the vibration amplitude on the lower end side of the outer shell body, the vibration amplitude values on both the upper end side and the lower end side, and the voltage and current applied to the AC motor. The slump value of the ready-mixed concrete and the insertion depth of the outer shell are specified from each position of the frequency, and based on this specification, the slump value of the ready-mixed concrete and the insertion depth of the outer shell are determined from the cycle specification data, torque specification data and amplitude specification data adapted to compaction of the ready-mixed concrete. an optimal combination setting function circuit that outputs optimal combination data, and a motor drive circuit that outputs power having a frequency and voltage value corresponding to each data to the AC motor using the cycle designation data and torque designation data. Optimal vibrator device for concrete compaction, characterized in that it is equipped with a power source and a solenoid drive circuit that introduces the amplitude designation data and outputs a DC voltage corresponding to the amplitude designation data to the solenoid. Control device