KR900005881B1 - A shaft weight measurement system - Google Patents

Abstract

Measuring device for shaft weight of vehicle comprises, loading plate (12) for simultaneously loading front and rear parts of vehicle (2), mounted at about the same level as road (1) on the plate level. The load plate mounted with loading detector (14) of plural members underneath, with added output of load detector amplified through amplifier (18) of indicator (16), converts digital signal (Wi), supplies to A/D converter (22) at the same time of supplying to indicator (20) and the device includes central processing unit (CPU), RAM, and ROM.

Description

Load bearing measuring device

1 is a flow chart of a first embodiment of a weight reduction measuring apparatus according to the present invention.

2 is a block diagram of the first embodiment.

3 is a diagram showing an output change state of the load detector used in the first embodiment.

4 is a main flowchart of the second embodiment.

FIG. 5 is a detailed flowchart of step S _{22 of} FIG.

6 is a schematic diagram of a conventional degeneration measuring apparatus.

* Explanation of symbols for main parts of the drawings

2: vehicle 3,4,5 axle

12: loading stand 14: load detector

24: CPU 26: wit limit switch

28: ROM 30: RAM

32: strong car limit switch

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for measuring the load on a vehicle, and more particularly, to the weight of a vehicle besides the load on a vehicle.

Conventional demagnetization measuring devices have been disclosed in, for example, Japanese Patent Laid-Open No. 54-136862.

As shown in FIG. 6, the load-bearing part 6 of width dimension W shorter than the distance between the axles 3, 4, 5 of the vehicle 2 is provided in the road surface 1.

The load-bearing detector 6 consists of the mounting table 7 and the some load detector 8. In the load bearing measuring device, the load bearing detector 6 is formed in the dimension W of the width as described above, so that only one shaft is placed in the load bearing detector 6 when the vehicle 2 runs on the load detector 6. In addition, as the vehicle 2 passes through the load detector 6, each load is obtained. In addition, there is a so-called truck scale as shown in FIG. 7 as a measure of the weight of the entire vehicle.

This is provided with a plurality of load detectors 10 on the road surface 1 below the mounting table 9 having a width dimension W ₁ on which all the axes 3, 4, 5 of the vehicle 2 are loaded. This is arranged on the road surface (1).

In this truck scale, the weight of the vehicle 2 can be measured with the axles 3, 4, 5 mounted on the platform 9. In the above-described axial measurement apparatus, the weight of each vehicle of the vehicle 2 can be measured, but there is a problem that the weight of the vehicle 2 cannot be measured.

On the contrary, in the above-mentioned truck scale, although the weight of the vehicle 2 can be measured, there is a problem that it is not possible to measure the weight of each vehicle. In order to solve the above problems, the present invention has a loading table having a size on which each axle of the vehicle is mounted and a load detector provided on the loading table. Furthermore, a means is provided for generating a notification signal each time the axle of the vehicle is loaded on the loading stand or whenever the axle is lowered on the loading stand, and each time the notification signal is generated, it is counted based on the output of the load detector. Means for obtaining signals are provided, and means for calculating the amount of change between adjacent ones of these relay signals are provided.

For example, when the vehicle with the axle N is loaded on the loading stand, a notification signal is generated when the first axle is loaded on the loading stand. At this time, a weighing signal (first weighing signal) is obtained, and a second axle is obtained. When loaded on the loading stand, a notification signal is generated, and a weighing signal (second weighing signal) at this time is obtained.

In the following, N total weighting signals up to the Nth weighting signal are similarly obtained. In this case, the second weighing signal indicates the total value of the weights of the first and second axles, and the third weighing signal indicates the total value of the weights of the first to third axles and the N-1 weighting signal. Denotes the total value of the weights of the first to Nth axles, and the Nth clock signal represents the total value (weight of the vehicle) of the weights of the first to Nth axles.

Therefore, the weight of each vehicle is obtained when the change amount detecting means detects the change amount between adjacent ones of the first to Nth relay signals.

For example, if the amount of change between the second weighing signal and the first weighing signal is obtained, the weight of the second axle is obtained. The N-th weighing signal indicates the weight of the vehicle as it is. Considering the case where the vehicle having the number of axles N is getting off the loading stand, as described above, each signal is obtained each time the axles are lowered.

The first weighting signal indicates the total weight of the second-N-th axle, and the second weighting signal indicates the total weight of the third-N-th axle. Therefore, if the amount of change between the zeroth signal (the signal on the load on the whole axle of the vehicle) and the first weight signal is detected, the weight of the first vehicle can be detected.

Similarly, the weight of each axle can be detected. In addition, the zeroth weighing signal indicates the weight of the vehicle. As described above, according to the present invention, each time signal is generated, the weighting signal at that time is obtained, and the amount of change between the weighting signals is detected.

Whenever the vehicle is loaded on the loading stand, the final weighing signal indicates the weight of the vehicle. When the vehicle is getting off the loading stand, the weighing signal before starting to get off indicates the weight of the vehicle. Therefore, according to this invention, a vehicle weight and each weight can be measured. Therefore, when driving on the highway, the vehicle is refused to use if the weight is over a predetermined value, but according to the present invention, a simple check is possible in advance before the vehicle is started at a factory.

In the present invention, mechanically only a loading stand and a load detector such as a conventional truck scale, and there is no need to add a lower mechanical device. Therefore, the weight and vehicle weight can be measured at a relatively low value. 1 to 3 show a first embodiment. In this embodiment, as shown in FIG. 2, the vehicle 2 is mounted on the mounting table 12.

The mounting table 12 is a size that the axle 3 at the front end of the vehicle 2 and the rear axle 5 can be loaded at the same time, and is provided such that the upper surface is located on the same surface as the road surface 1. A plurality of load detectors 14 are provided on the underside of the mounting table 12, and the output of each of these load detectors 14 is added, amplified by the amplifier 18 in the indicator 16, and the indicator 20 ) Is supplied to the A / D converter 22 and converted to the digital relay signal W ₁ .

This digital relay signal W ₁ is supplied to the CPU 24 of the microcomputer. The CPU 24 is also supplied with a detection signal in a state loaded from the tact detection limit switch 26 provided at the right end of the upper surface of the mounting table 12.

The CPU 24 processes the digital weighing signal W ₁ , the situation detection signal carried by the RAM 30 and the data, in accordance with the program stored in the ROM 28, and processes the data with each RAM of the vehicle 2 and the vehicle ( Measure the weight of 2). In this embodiment, each shaft weight and vehicle weight are measured as follows. When the vehicle 2 passes through the base 12 at a low speed, first, the axis 3 of the vehicle 2 is loaded on the base 12, and the situation detection limit switch 26 is turned on. In this case, the CPU 24 reads the digital relay signal W ₁ from the A / D converter 22, calculates an average of the predetermined number of the digital relay signal W ₁ after the digital relay signal is stabilized, and calculates the average value of the digital relay signal W ₁ . Remember as weight.

Next, if the axle 4 is also loaded, the total weight of the axles 3 and 4 is similarly obtained, and the weight of the axle 4 is calculated and stored by subtracting the weight of the axle 3 stored earlier. The total weight of the axles 3 and 4 is stored.

If the axle 5 is also loaded, the total weight of the axles 3, 4, and 5 is similarly obtained, and the total weight of the vehicle 3, 4, which has been previously stored, is subtracted, thereby reducing the weight of the vehicle 5. The total weight of the axles 3, 4, and 5 is stored as the vehicle weight at the same time. (See FIG. 3)

For this reason, as shown in the flowchart of FIG. 1, first, the areas Wa and Wh acquired in the RAM 30 are respectively 0 and n is 1. (step S ₁ ) The area Wa is for calculating each axle weight. First, to store the average weight calculated when the limit switch 26 is ON, Wh is to store the average weight calculated each time the limit switch 26 is turned ON (n) To count the number of each axle.

Next, it is determined whether the placement detection switch 26 is ON (step S ₃ ), and if NO, the process moves to step S ₁₆ to be described later. If YES, the digital weighing signal W ₁ is read (step S ₅ ), and it is determined whether the difference between the digital weighing signal W ₁ and the value of the area Wa is equal to or greater than a predetermined value Z ₁ (step S ₇ ).

This step S ₇ is for checking whether the digital relay signal is in an increasing state, that is, a state in which the next is loaded. If step S ₇ is YES, steps S _{8 to} S ₁₄ are executed. They judge whether the digital relay signal is stable, and if it is stable, store the digital relay signal by a predetermined number C, calculate the average value thereof, and use the average weight as the total weight of the axes placed on the base 12 currently loaded.

That is, the value of the area N on the RAM 30 for storing the number of digital relay signals collected to obtain the average value in step S ₈ is 0, and the RAM for storing the accumulated values of the digital relay signals 30 is obtained. The value of the above area W _AB is set to 0.

Then, the digital read signal W ₁ to be read is shifted to the area W ₂ for storing the digital read signal W ₁ read earlier, in order to detect whether or not the digital read signal W ₁ is recognized (step S ₉ ). The digital relay signal W ₁ is newly read (step S ₁₀ ).

Determines that the next to the absolute value of the difference between the digital gyejung signal W ₁ and a digital gyejung signal W ₁ value of the area W ₂ which stores the value of embellish previously read is the value Z ₂ below a predetermined (step (S ₁₁ ))

If this judgment is NO, the digital relay signal is not stable, so the loops of steps S _{8 to} S ₁₁ are repeated until this judgment is YES. The step (S ₁₁₎ and increases the value of this one when a YES gyejung digital signal W ₁ is also stable hayeoteumeuro stacked his gyejung digital signal W ₁ to W area _AB and areas at the same time N. (Step (S ₁₂₎₎

Then, it is determined whether the value of the area N is equal to the predetermined C (step S ₁₃ ), and if NO, the loops of steps S _{9 to} S ₁₃ are repeated until YES. The step (S ₁₃₎ When a YES results in a stable digital C of cumulative value of gyejung signal W ₁ and stored in the area W _AB, divide the value in the area W _AB to C (step (S _14)), to obtain the average value Remember in the area Wh.

Further, treating as the total value of the weights of the shafts loaded on the base 12 on which the average value is carried out means that the vehicle 2 travels without stopping the base 12 on the loading base, so that it is averaging the scattered deviation from the average value of the measured values due to vibration. This is to remove by to obtain a weight close to the true value. Subsequently, the value of the area Wa (total weight of the shaft loaded on the mounting table 12 before being loaded onto the mounting table 12) is subtracted from the total weight of the shaft loaded on the mounting table 12 recorded in the area Wh. and, loading the new one to increase the value of about 12, the value of remembering and dongsing area Wh the areas and calculating the weight Wn to the silico-axis and moving in an area at the same time the area Wa n. (step (S ₁₅₎₎

(Finishes the execution of the step (S ₁₅₎ returning to step (S ₃₎ (step (S ₃₎ -. (By running the loop of the step (S ₁₅₎ and stores the weight of each axis in each region Wn more regions Wn Is designated by the value of the area n which stores the number of axes. Finally, if the value of the area n is 3, for example, the area Wn has three of W ₁ , W ₂ , and W ₃ .

All axes are put side carried on the board (12) a step (S _3), - the determination of the step (S ₃₎ between which run the loop of (S ₁₅₎ and a NO step _{(S 3) - (S 15} ) It is determined whether the value obtained by subtracting the loop of and subtracting the value of the area Wa (total weight of all the axles 3, 4, and 5) from the digital signal W ₁ at that time is smaller than the predetermined value Z ₃ . Step (S ₁₆ ))

This judgment is for judging whether the vehicle starts to get off from the loading stand 12. Coming is determined that the return to the step (S ₃₎ is NO, YES back to the value of the area Wa of the time as the weight of the vehicle (2) was stored in the area W _T (step (S _17)), digital gyejung signal W ₁ determining the absolute value of the substantially equal to a value D set in the vicinity of O and repeated (step (S _18)), a step (S ₁₈₎ until a YES is NO, and stops when a YES.

This step S ₁₈ is for detecting whether or not the vehicle 2 is completely lowered from the mounting table 12. 4 shows a flow chart of the second embodiment. This embodiment is loaded on the base 12 where all of the axles 3, 4, and 5 of the vehicle 2 are loaded, and each time the vehicle 2 is unloaded from the axle with the weight of the vehicle 2 measured, It measures by measuring the weight of the axle which measured and subtracted the weight from the weight measured previously.

For this reason, as shown by the dotted line in FIG. 2, the strong limit switch 32 is newly installed in the left end of the mounting base 12, and the output is input into CPU24. The step (S ₂₀₎ of the flow chart 4 degrees - (S ₂₂₎ determines the silica is junginga the board (12) is for measuring the weight of the vehicle (2), the first axle loading (step (S _20). )

This determination can be made by judging whether the limit switch 26 is ON as in step S ₃ of the first embodiment, or by judging whether the digital signal has changed by a predetermined value. Or, it can also be seen that the operator who checks by visually confirm that the axle is mounted on the mounting table 12 has been operated whether or not the button switch is pressed, it may be determined by combining them properly.

If this step S ₂₀ is YES, the total weight of the axle currently loaded on the stand 12 is calculated by step S ₂₂ . This step S ₂₂ is the same as the steps S _{8 to} S ₁₄ of the first embodiment as shown in FIG. 5, and the average value Wh of the predetermined number of digital relay signals after the digital relay signal W ₁ is stable. To obtain the total weight of the axle loaded on the current stage (12).

Continue in this step (S ₂₂₎ and determines the step (S ₂₂₎ the average weight Wh current digital gyejung signal W ₁ a greater than the value Z ₄ value is determined in advance subtracted from the obtained in (step (S ₂₄₎₎ This determines whether the total weight (weight of the vehicle 2) of all the axles 3, 4, 5 is obtained, for example, the sum of only the axle 3 or only the axle 3, 4 If the value of digital weighing signal W ₁ is larger than Wh at the stage that cannot be obtained other than the weight, the digital load signal W ₁ is loaded on the stand 12 of the axles 3, 4, 5 and lowered from the stand 12 of the axle 3. It is used that the part of the weighing signal W ₁ becomes smaller than Wh.

Reiterates the loop of (S ₂₄₎ - when the judgment in the step (S ₂₄₎ the NO to return to the step (S ₂₀₎ a step (S ₂₄₎ determines that the step (S ₂₀₎ until a YES. If the judgment of step S ₂₀ is NO, the process jumps to step S ₂₄ . If the judgment at step S ₂₄ is YES, the weight of the vehicle 2 is obtained as Wh, and this is lowered by the weight of the axle remaining on the loading table 12 when the loading platform 12 is lowered. The weight of the axle is obtained by the following steps.

For this reason, the value of the area n for counting down the axle is first set to 1, the area W _T for storing the axle weight of Wh, and the Wh is also transferred to the area Wa used for calculating each axle weight. (S ₂ ))

And judges applied during gangcha the following: (step (S ₂₈₎₎ The step (S ₂₈₎ of the determination may also be by applying temyeon limit switch 32 is turned on (ON) determined this, the digital gyejung signal W It is possible to judge whether or not _{1 has} decreased _{by a} predetermined amount, or it can be seen that the worker judges whether the axle is lowered by pressing the button switch to judge that the axle is lowered. good.

This determination is again calculate the total weight Wh of the axle which appears on the loading board (12) by a step (S ₂₂₎ If a YES. This Wh is reduced from the value of the area Wa by the amount lowered from the base 12 on which the axle is mounted. So the Wh in the area Wa was stored in the step (S ₃₀₎ regions Wn calculated on the weight of the unloaded axle, and specified by the value of the area n by subtracting Wh from the value of the area Wa in order to calculate the weight of the axle make the following Move, increase the value of area n by 1 and return to step S ₂₈ and repeat the loops of steps S ₂₄ -S ₃₀ until the weight of all axles is calculated.

When the calculation of all the axle weights is finished, the judgment at step S ₂₈ is NO, and it is judged whether the digital signal W ₁ is smaller than the preset value D near O (step S ₃₂ ). This completes the calculation of the weight of the vehicle 2 and the weight of each axle 3, 4, 5.

In addition, since there is some time until the next axle is lowered from which the axles are loaded 12, the judgment of step S ₂₈ becomes NO. At this time, the judgment of step S ₃₂ also becomes NO and step S ₂₈ . Returning to, the loops of steps S ₂₀ -S ₃₀ are maintained until the weight of all axles is calculated.

The measurement of the load when such an axle is lowered on the loading stand 12 is performed when the goods are loaded on the vehicle 2 on the loading stand 12 or when the road surface 1 and the loading side of the loading stand 12 are different from each other. It is applied when the measurement is good when there is a step between them and when it is lowered from the loading table 12. In the first embodiment, the limit switch in the running state is installed, and in step S ₃ , it is determined whether the mounting switch is ON, and then the step S ₇ is detected after the mounting of the axle to the mounting base 12 is detected. By detecting whether or not the amount of change in the digital relay signal is greater than a predetermined value, the mounting on the axle 12 is detected. In this way, the detection of the vehicle 2 is carried out in steps S ₃ and S ₇ . It is for detection certainly, but it is added only by either.

In addition, it is detected whether the digital signal is stable by the step (S ₌ )-(S ₁₁ ), but when this digital signal is stable, the axle will be on the loading table (12). It may be. In that case, it is good to provide suitable means for executing step S ₁₇ when all vehicles are mounted.

In place of the mounting switch, a worker is placed on the grain of the mounting table 12 in the same manner as in the second embodiment, and the operator checks that the axle is loaded on the mounting table 12, and operates the switch. 24 may be notified of the mounting of the axle.

The case may be changed to a step (S ₃₎ according to the determination of whether or not there is mounted notification signal. In this case, detection of the mounting by step S ₇ may be removed. In addition, the notification of the mounting of the axle by the operation of the mounting limit switch or the switch based on the operator's eyes stops when the axle 3 of the vehicle 2 is loaded on the stand 12. The present invention also applies to the case where the vehicle axle 4 stops in the state where the axle 4 is placed, and the vehicle 2 that the axle 5 stops in the state of mounting is placed on the mounting table 12.

In such a case, it was a relatively long time between the mounting of an axle and the next mounting, and since the digital signal is less affected by vibration, etc., the stationary state of the vehicle 2 is not required to obtain the average value of the digital signal. The digital relay signal may be read into the CPU 24 as it is.

In the above first embodiment, the weight of the mounted axle was calculated every time the axles were placed, but after each shaft was placed on the table 12, the average values obtained at that time were stored separately. In addition, the weight of each axis may be calculated using the average value when each axis that was separately stored is placed.

The above-described modification can be carried out similarly to the second embodiment. That is, detection of the axle lowered on the mounting table 12 by the heavy vehicle limit switch or the operator's switch operation stops at the mounting table 12 by the shaft 3 and stops thereafter. It is also applied when the vehicle 2 gets off the mounting table 12 so that the shaft 5 moves down.

In this case, the digital relay signal may be read directly to the CPU 24 without obtaining the average value. Whenever the axles are lowered, the respective average values at that time may be separately stored. After all the axles are lowered, the respective weights may be calculated based on the average values and the vehicle weights. In the first and second embodiments, when the average value is obtained, when the digital value of the signal W ₁ is stabilized and the digital value of the digital signal W ₁ is stabilized when the digital value of the signal W ₁ is stabilized, The cumulative value and number may be obtained and the average value may be obtained by these.

Claims (4)

Whenever the axle of the vehicle is loaded on the loading stand 12 and the load detector 14 installed on the loading stand 12 and the loading stand 12 of the size that can load all the axles of the vehicle 2 or the above-mentioned. Means for generating a notification signal each time the axle is lowered on the loading table 12 and means for obtaining a signal based on the output of the load detector 14 each time the notification signal is generated, and for each gain signal. A degeneration measuring device having means for calculating a change amount between adjacent ones. 2. The degeneration measuring apparatus according to claim 1, wherein said notification signal generating means is a limit switch provided on said mounting table (12). An apparatus according to claim 1, wherein said notification signal generating means is a means for detecting the stability of the output of said load detector (14). The degeneration measuring apparatus according to claim 1, wherein said notification signal generating means is an operation switch.

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