JPH0657925B2 - Condition setting method of automatic control in flattening machine - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method of setting operating conditions applied to an automatic leveling machine such as an asphalt finisher or a base paver.

[Conventional technology]

In a conventional leveling machine, an operator grasps various conditions such as the type of asphalt mixture used, pavement width, pavement thickness, etc., and then manually operates while looking at the actual pavement surface.

[Problems to be Solved by the Invention]

However, in the above-mentioned leveling machine, the leveling is easily influenced by the skill level and the like because the operation depends on the intuition of the operator, and it is difficult to always obtain a good finish.

Therefore, the applicant of the present invention has developed an automatic control type leveling machine. This new leveling machine has a structure in which it is automatically driven according to operating conditions such as the type of asphalt mixture, pave width, pave thickness, etc., which is driven by a keyboard into a control device.

However, it is troublesome and troublesome to drive the operating conditions such as the pavement thickness into the control device at the pavement site by using a keyboard, and it takes time, and there is a problem that the driving is easy to make an error.

It is an object of the present invention to provide a condition setting method for automatic control in a leveling machine, which can quickly and accurately set operating conditions such as pavement thickness in a control device.

[Means for Solving the Problems]

In order to achieve the above object, the present invention provides a traveling vehicle,
A hopper for putting the asphalt mixture, a feeder for transferring the asphalt mixture in the hopper, and a screw for spreading the asphalt mixture sent by the feeder to the left and right,
A screed for spreading the asphalt mixture spread by the screw is provided, and an operating condition is set in a control device in advance and the asphalt mixture is spread according to the operating conditions. Is configured to be set in the control device by a recording medium such as an IC card.

[Action]

The operation of writing operating conditions such as pavement thickness on a recording medium such as an IC card is usually performed by an expert in an office. Therefore, writing can be performed quickly and accurately without any error.

The operator of the leveling machine sets the above recording medium in the control device and activates the control device to perform the leveling work.

When the operating condition changes, the content of the recording medium is rewritten to the new operating condition, but if the operating condition is the same, the recording medium is repeatedly used as it is. Therefore, also in this respect, the setting of operating conditions for the control device can be rationalized.

〔Example〕

The accompanying drawings show an asphalt finisher for carrying out the present invention, and reference numeral 1 in the drawing denotes a traveling vehicle of an asphalt finisher AF. The traveling vehicle 1 is of a crawler type, and includes a hopper 2 for containing an asphalt mixture,
The asphalt mixture inside the hopper 2 is rearward (right in Fig. 1)
And a screw 4 that spreads the asphalt mixture B sent by the feeder 3 evenly to the left and right,
A pair of left and right screeds 5 whose positions are shifted before and after the asphalt mixture B spread by the screw 4 is spread and leveled.
Is provided. Each screed 5 is mounted on a side surface of the traveling vehicle 1 so as to be vertically swingable about a pivot 6, and a screed frame 8 is attached to a leveling arm 7, 7 (only the front side leveling arm 7 is shown in FIG. 1). Suspended through. The rear ends of the leveling arms 7 are rotatably connected to the tip ends of rods of a pair of left and right screed cylinders 9, the base ends of which are rotatably connected to the upper rear ends of the traveling vehicle 1. By operating the screed cylinder 9, the screeds 5 can be moved up and down about the pivot 6. In addition,
The basic structure of the asphalt finisher AF is well known.

Further, reference numeral 11 is a measuring device. The measuring device 11 includes a reference member 14 which is pivotally attached at its rear end to a support member 12 fixed to the upper surface of the screed frame 8 by a support shaft 13 and is rotatably provided within a vertical plane along the traveling direction, and a leveling arm. 7, a hydraulic cylinder 16 pivotally mounted to a mounting member 15 fixed to 7 and a piston rod 16a pivotally mounted to a mounting member 17 fixed to a reference member 14, and installed on the upper surface of the reference member 14, The slope controller 18 which detects the inclination of the reference member 14 and sends a control signal to a control valve (not shown) of the hydraulic cylinder 16, and the reference member 1
It is composed of a first distance sensor (road surface distance detector) 21 and a second distance sensor 22, which are individually pivotally attached to the mounting members 19 and 20 fixed to the No. 4 vehicle. The mounting member 19 is fixed to the tip of the reference member 14, and the other mounting member 20 is provided between the mounting member 19 and the support shaft 13 at a position ⅓ behind the mounting member 19. The support shaft 13 is located between the left and right screeds 5, 5. The slope controller 18 has a function of measuring an inclination angle, and controls the inclination angle of the reference member 14 to be zero (horizontal).

The distance sensors 21 and 22 include a tubular member 23 and a rod member 24,
And a potentiometer (not shown). The tubular member 23 and the rod-shaped member 24 are fitted into each other in a stretchable manner. The potentiometer converts the relative displacement of the cylindrical member 23 and the rod member 24 into an electric signal.

A connecting member 25 is pivotally attached to the lower ends of the rod-shaped members 24, 24 of the distance sensors 21, 22. The connecting member 25 is provided with wheels 26 on the lower surfaces of the pivotal positions of the rod-shaped members 24, 24, respectively.
And is connected to the traveling vehicle 1 by a connecting rod (not shown). The connecting member 25 is pulled by the traveling vehicle 1 to travel on the roadbed surface and transmits the unevenness of the roadbed surface to the distance sensors 21 and 22. The traveling vehicle 1 is provided with an odometer 27 (FIG. 2).

The distance sensors 21 and 22 and the odometer 27 include a control device 3
0 is connected. The control device 30 uses the distance sensor 2
An A / D (analog-digital) converter 31 for receiving the analog outputs of 1 and 22 and converting the analog outputs into digital outputs;
An I / O (input-output) interface 32 to which the digital outputs of the A / D converter 31 and the odometer 27 are input, and an arithmetic unit 33 that performs an arithmetic operation based on the data from the I / O interface 32. And this calculation unit 33
The data storage unit 34 for inputting and storing the numerical value obtained in step 1 and outputting it to the arithmetic unit, and the data processing for sending this numerical value to the display device 36 provided at an appropriate place such as the driver's seat of the traveling vehicle 1 are processed. It is composed of an I / O interface 35 to be performed and an input unit 37 for inputting an initial operation condition of pavement.

The control device 30 detects the distances from the distance sensors 21 and 22 measured each time the traveling vehicle 1 travels a distance 1 of 1/3 of the length 3l between the mounting member 19 of the reference member 14 and the support shaft 13. Perform the required calculation based on the measurement signal. When the roadbed surface is inclined at the angle θ, it is preferable to set the calculated traveling distance of the traveling vehicle 1 to lsecθ.

The main calculation content of the control device 30 is a pair of distance sensors 2
Two measurement points P ₁ , simultaneously measured by 1, 22
Calculating the height difference between P ₂ , P ₂ , P ₃ , P ₃ , and P ₄ , calculating the pavement thickness t at the position of the supporting shaft 13 (P _{1 in} FIG. 3) which is the reference point, and Measurement point P ₁ at the reference point position
P ₁ ′ above t and in front of the measurement point P ₁ (the third
Other measurement points P ₂ , P ₃ , P ₄ lined up on the left in the figure and FIG. 4)
_{One of} the straight lines T ₁ , T ₂ , T ₃ connecting P ₂ ′, P ₃ ′, P ₄ ′ above the target pavement thickness t *, or averaging a plurality of these straight lines, etc. The straight line obtained by performing the calculation process of 1. is determined as the pavement thickness reference straight line.

As for the height difference, the nth measurement result of the first distance sensor 21 is N
_n , the measurement result of the second distance sensor 22 is M _n ,
That is, when the measurement results of the _n- 1th time distance sensors 21 and 22 are N _n-1 and M _n-1 and the measurement results of the previous two times are N _n-2 and M _n-2 , the following (1) , (2), (3) are calculated and output.

N-th _{M n -N n ...... (1)} N-1 th _{M n-1 -N n-1} ...... (2) N-2 -th _{M n-2 -N n-2} ...... (3) Further, For the pavement thickness t, the following equation (4) is calculated.

t = _Mn + ( _Mn-2- Nn _-2 ) + ( _Mn-1- Nn _-1 ) -L ...
(4) where (M _n-2 -N _n-2 ) is the height difference between P ₁ and P ₂ , that is, δ ₁ , and (M _n-1 -N _n-1 ) is P ₂ and P _2. The height difference of ₃ is δ ₂ . L is the height from the bottom surface of the screed 5 to the reference member 14 and is constant.

In addition, the control device 30 controls the reference measurement point P in FIG. 4, for example.
For ₁ other than the measurement point is one (P _2), the straight line T ₁ connecting 't * only above the point P ₂ from P ₂ a' just above the point P ₁ t than P ₁ and the pavement thickness reference straight line and when the measurement point other than the reference measuring point P ₁ is 2 or more, the reference measurement point P ₁ and the other measurement point P _2, P _3, the height difference between the P _4, and from a distance,
A point P ₁ ′ above the reference measurement point P ₁ by t and points P ₂ ′, P ₃ ′ above the other measurement points P ₂ , P ₃ and P ₄ by t *.
The highest straight line T _{2 of} straight lines T ₁ , T ₂ and T ₃ connecting P ₄ ′
Is determined as the pavement thickness reference straight line.

Further, using this result, each screed 5 moves on the pavement thickness reference straight line T ₁ or T ₂ to perform pavement,
The supply amount of the asphalt mixture B by the feeder 3, the attack angle of the screed 5 by the screed cylinder 9, the speed of the traveling vehicle 1 and the like are controlled.

There are various types of leveling machines, such as those using wheels instead of crawlers, and those using distance sensors 21 and 22 of ultrasonic type or laser type, but such a detailed structure is arbitrary.

In the present invention, the above target pavement thickness t * is input to the IC card as the pavement initial condition, and the initial condition is I
It is input to the control device 30 by inserting the C card into the input unit 37. The target pavement thickness t * includes a target pavement thickness on the left and a target pavement thickness on the right, which are set arbitrarily such as 50 mm or 70 mm. In addition to the target pavement thickness, the following pavement initial conditions input to the IC card include the following, and examples of setting items and their contents are shown below.

In other words, ◎ Selection of pavement thickness control method Pavement thickness priority control Flatness priority control Side level control Slope level control Other ◎ Selection of mix type Coarse-grained asphalt concrete (hereinafter referred to as Ascon)
(20) Dense particle size Ascon (20) Dense particle size Ascon (13) Fine particle size Ascon (13) Dense particle size gap Ascon (13) Other ◎ Determination of pavement width 4.5m, 4.0m 3.5m to road width Set according to: ◎ Planned paving distance setting: 500m, 300m setting ◎ Mixing material density setting: 2.40t / m ₃ setting ◎ Scheduled work speed setting: 3.0m / min setting IC card Writing of initial pavement conditions is usually done in the office. The IC card to which the pavement initial conditions are input is given to the operator, and the operator who receives the IC card inputs the IC card to the input unit 37 provided on the operation panel.
To insert. When the IC card is inserted into the input section 37,
The setting contents of the IC card are displayed on the initial condition setting screen 38 (FIG. 5) of the display device 36. The operator confirms the initial condition of the pavement on the initial condition setting screen 38, and starts the pavement work.

When the paving work is completed, the operator removes the IC card from the input section 37 and brings it back to the office.

If there is no IC card that has input the initial pavement conditions for the road to be paved or if it is necessary to correct some of the initial pavement conditions input to the IC card, a keyboard provided in the input unit 37 (Not shown) is operated to input the pavement initial condition into the control device 30,
Also make corrections.

The IC card has the date, time, asphalt mix name,
Work data such as changes in pavement thickness, pavement width, travel distance, and amount of mix material used are stored as necessary, and are retrieved after the completion of pavement work and used for management of pavement construction.

The automatic control based on the pavement thickness reference straight line and the automatic control based on the initial operating conditions set by the IC card may be selected from one of them depending on the content of the automatic operation or both of them may be automatically operated. it can. The pavement thickness reference straight line is displayed on another screen of the display device 36.

〔The invention's effect〕

As described above, the condition setting method for automatic control in the leveling machine according to the present invention includes a hopper that puts an asphalt mixture in a traveling vehicle, a feeder that transfers the asphalt mixture in the hopper, and the feeder. A screw that spreads the asphalt mixture sent from the left and right and a screed that spreads the asphalt mixture spread by the screw are provided, and the operating conditions are preset in the control device and the asphalt is set according to the operating conditions. In the leveling machine that spreads the mix, the operating conditions are set in the control device by a recording medium such as an IC card, so that the operating conditions such as pavement thickness can be quickly and accurately controlled by the control device. Can be set.

[Brief description of drawings]

FIG. 1 is a side view showing an example of a leveling machine to which the present invention is applied, FIG. 2 is a block diagram showing an example of a control device, and FIG.
1 is an explanatory view of the pavement thickness measurement theory by the leveling machine of FIG. 1, FIG. 4 is an explanatory view of a pavement thickness reference straight line, and FIG. 5 is a front view showing an example of a display screen of a display device. DESCRIPTION OF SYMBOLS 1 ... Traveling vehicle, 2 ... Hopper 3 ... Feeder, 4 ... Screw 5 ... Screed, 30 ... Control device B ... Asphalt mixture

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tetsuo Ogawa 730, Mitsutaka, Gunma-gun, Gunma-gun Gunma Prefecture, Niigata Iron Works Takasaki Plant (72) Inventor Masaaki Saito 27, Isogo-cho, Isogo-ku, Yokohama, Kanagawa Prefecture Niigata Iron Works Development Center Co., Ltd.

Claims (1)

[Claims] 1. A hopper that puts an asphalt mixture into a traveling vehicle, a feeder that transfers the asphalt mixture in the hopper, a screw that spreads the asphalt mixture sent from the feeder to the left and right, and a screw. A screed for laying out the spread asphalt mixture is provided, and the operating conditions are preset in the control device, and a leveling machine for laying the asphalt mixture according to the operating conditions is provided with an IC card. A method for setting conditions for automatic control in a flattening machine, characterized by setting in a control device with a recording medium such as.