JP3334860B2 - Gain adjustment device for weighing scale - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for adjusting a gain of a sensor for measuring a weight of a vehicle in a vehicle-mounted weighing scale for measuring the weight of a load loaded on a bed of a vehicle such as a truck. .

[0002]

2. Description of the Related Art For the purpose of preventing traffic accidents such as overturning due to overloading and the acceleration of deterioration of vehicles and road surfaces, the measurement of the weight of vehicles is mainly intended for large vehicles such as trucks. There is a shift from a method in which a vehicle to be measured is mounted on a platform scale to a method in which a load weighing scale mounted on a vehicle itself that does not require such facilities and installation space.

In a conventional vehicle-mounted weighing scale, for example, an arc-shaped leaf spring is interposed between front and rear left and right portions of a carrier frame and right and left ends of both front and rear axles (axles). For example, a sensing element for weight measurement, such as a strain gauge sensor, is attached, and the weight loaded by calculation using a microcomputer, for example, from a weight signal output from each sensing element according to the weight applied to the front, rear, left and right sensing elements. , The load weight is measured.

[0004] By the way, it is important to set a gain in accordance with the characteristic of each of the sensing elements described above in order to improve the accuracy of the load weight calculated by the weight signal output from each sensing element. Becomes

Conventionally, therefore, a weighing device has been used which measures the weight of a vehicle by mounting a vehicle such as the platform weigher described above, measuring the weight of each vehicle, and subtracting the weight of the vehicle from the value.
By comparing the load weight measured by the weighing value with the load weight calculated by the vehicle weighing scale, a gain value that eliminates the difference is manually calculated, and the calculated gain value is set to each of the loading weighing scales. Setting the gain of the sensing element has been performed.

[0006]

However, in the above-described gain value setting operation, at least two people are required to read the weighing value of the weighing device and to read the calculated value of the weighing scale in the vehicle. In addition, the change in the value of the weight signal output from the sensing element differs between when the load weight increases and when the load weight decreases. In order to set the gain value in consideration of the so-called hysteresis characteristic, the load weight of the vehicle is changed. When reading the weighed value of the weighing device and the calculated value of the loading weighing scale while increasing or decreasing the load, additional personnel for increasing or decreasing the loading weight using a forklift or the like are required, and the work efficiency is poor. There was a problem.

[0007] The present invention has been made in view of the above circumstances,
An object of the present invention is to adjust a gain value of a weight signal of a value corresponding to the weight from a load on a load, which is output by a sensor for measuring a load placed on a portion of the vehicle that supports the load, which is small. An object of the present invention is to provide a gain control device for a weighing scale that can be efficiently adjusted by personnel.

[0008]

According to the first aspect of the present invention, there is provided a gain control apparatus for a weighing scale according to the present invention, as shown in FIG.
For measuring the weight of the load, which is arranged at the portion supporting the
The weight signal output by the load 3 and corresponding to the weight of the load on the loading platform 9 is corrected by the gain value held in the gain value data holding means 19, and the weight signal based on the gain correction is used as a basis. Is a device for adjusting the gain value to be held by the gain value data holding means 19, the device being connected to a load scale 11 for calculating a calculated load weight of the vehicle 1. The calculated load weight collecting means 61A for collecting the calculated load weight of the vehicle 1 from the load scale 11, and the weighing sensor 2 output from the weighing sensor 21 on which the vehicle 1 is mounted.
A weighing signal collecting unit 61B for collecting a weighing signal corresponding to the load applied to the vehicle 1; a timing at which the calculated load weight collecting unit 61A collects a calculated load weight of the vehicle 1 from the load weight meter 11; Metering signal collecting means 61B
Trigger means A for setting the timing for collecting the weighing signal from the weighing sensor 21 and the actual loading weight of the vehicle 1 based on the weighing signal collected from the weighing sensor 21 by the weighing signal collecting means 61B. And the calculated load weight of the vehicle 1 collected from the load weight 11 by the calculated load weight collecting means 61A at the timing set by the trigger means A, The actual load weight of the vehicle 1 calculated by the actual load weight calculating means 61C based on the weighing signal collected from the weighing sensor 21 by the weighing signal collecting means 61B at the timing set by the trigger means A is used. And a gain value determining means 61D for determining the gain value to be held by the gain value data holding means 19. To.

Further, in the gain adjusting device for a weighing machine according to the present invention, the gain value determining means 61D is provided.
However, the calculated load weights of the plurality of vehicles 1 collected from the load weight meter 11 at a plurality of timings set by the trigger means A by the calculated load weight collecting means 61A, and the weighing signal collecting means 61B Is the trigger means A
Sensor 2 at a plurality of timings set by
The gain value to be held in the gain value data holding means 19 based on the actual loading weight of the plurality of vehicles 1 calculated by the actual loading weight calculation means 61C based on the weighing signal collected from the first and second weighing signals. Was determined.

Further, in the gain adjusting device for a weighing machine according to the present invention, the sensors 13 are respectively arranged in a plurality of portions supporting the loading platform 9 of the vehicle 1, and the gain value data is retained. The gain value of each of the sensors 13 is individually held in the means 19, and a plurality of weight signals respectively output by the plurality of sensors 13 are held in the gain value data holding means 19 by the loading weight meter 11. By performing gain correction using the gain values corresponding to the respective sensors 13, the calculated loading weight of the vehicle 1 is calculated based on the weight signal from each of the sensors 13 after the gain correction, and Further comprising arrangement pattern data setting means B for inputting and setting arrangement pattern data indicating an arrangement pattern of the sensor 13 in the vehicle 1; D is the calculated load weight of the vehicle 1 collected from the load scale 11 by the calculated load weight collecting means 61A at the timing set by the trigger means A, and the weighing signal collecting means 61B The actual loading weight of the vehicle 1 calculated by the actual loading weight calculation means 61C based on the weighing signal collected from the weighing sensor 21 at the timing set by the means A, and the arrangement pattern data setting means B Based on the set arrangement pattern of the plurality of sensors 13 in the vehicle 1, the gain values of the sensors 13 to be held by the gain value data holding means 19 are individually calculated.

According to the gain adjusting device for a weighing scale according to the present invention, at the timing set by the trigger means A, the loading weight from the weighing weight 11 calculated by the loading weight collecting means 61A is calculated. Collection of the calculated load weight of the vehicle 1 calculated by the weighing scale 11 and collection of the weighing signal from the weighing sensor 21 by the weighing signal collecting means 61B are performed. As a result, the timing set by the trigger means A Then, the actual loading weight of the vehicle 1 is calculated by the actual loading weight calculating means 61C based on the weighing signals from the weighing sensors 21 collected by the weighing signal collecting means 61B. The calculation of the gain value of the sensor 13 to be held by the gain value data holding means 19 based on the calculated load weight and the actual load weight of the vehicle 1 is a gain. Performed by indexing means 61D.

Therefore, the weighing signal from the weighing sensor 21 and the calculation of the actual loaded weight of the vehicle based on the fetched weight signal and the weight signal output from the sensor 13 are conventionally performed by manual operation. Vehicle 1
The calculation of the load weight in the above calculation and the calculation of the gain value suitable for the sensor 13 based on these calculations are all automated,
This makes it possible to reliably perform the operation of adjusting the gain value of the sensor 13 with a small number of people.

According to the gain adjusting device for a weighing scale according to the present invention, for example, when a plurality of timings are set by the trigger means A while increasing or decreasing the weight of the load on the loading platform 9, the weighing sensor The value of the actual load weight of the vehicle 1 calculated from the weighing signal output by the sensor 21 and the value of the calculated load weight of the vehicle 1 calculated from the weight signal output by the sensor 13 correspond to the load on the loading platform 9. The gain value to be set for the sensor 13 is determined based on the plurality of samples in a state where the weight of the load on the loading platform 9 is different while the weight of the load is increased or decreased. Will be determined by

Therefore, even if the change in the value of the weight signal output from the sensor 13 is different depending on the influence of the hysteresis characteristic when the weight of the load on the loading platform 9 increases and decreases, the influence of the hysteresis characteristic is considered. The gain value of the sensor 13 can be determined by the gain value determining means 61D.

Further, according to the gain adjusting device for a weighing scale of the present invention described in claim 3, when the sensors 13 are arranged in a plurality of portions supporting the loading platform 9 of the vehicle 1, each sensor 13 Even if the characteristics are different from each other, or
Even if the degree of application of weight from the load on the loading platform 9 is different depending on the arrangement of the sensors 13 in the vehicle 1, individual gain values corresponding to the respective sensors 13 are divided by the gain value calculating means 61D. It will be possible to put out.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 is a schematic configuration diagram showing a situation when the gain of the weighing scale is adjusted using the gain adjustment device according to the present invention.

In FIG. 2, reference numeral 1 denotes a vehicle, and the vehicle 1 includes wheels 3, a carrier frame 5, a cabin 7, and
The wheel 3 has a front wheel 3a having two axles and two wheels.
And four rear wheels 3b of four shafts.

The reference numeral 11 in FIG.
The load weighing scale 11 measures the weight of the load loaded on the loading platform 9 of the vehicle, and the loading weighing scale 11 is provided between the wheels 3a, 3b and the loading frame 5, for example, each axle and a leaf spring for suspension. Are installed at the connecting portions of
It is provided with six sensors 13 for detecting the weight applied to each of the front wheels 3a and the rear wheels 3b from the side, and a display unit 15 to which these sensors 13 are connected.

As shown in a perspective view in FIG. 3, each of the sensors 13 includes a plate-like member 13a made of a magnetic material such as permalloy and formed in a flat and substantially rectangular shape in a plan view.
An exciting winding 13b and a detecting winding 13c, which are wound orthogonal to 3a to form a cross coil, are provided.

The above-described sensor 13 includes an exciting winding 13b.
The plate-like member 13a
When the induced current flows through the detection winding 13c due to the magnetic field generated in the sensor 13 and the load of the load is applied to the sensor 13 from the loading platform 9 side and the plate-like member 13a is distorted, the direction of the magnetic field of the plate-like member 13a changes. As a result, the frequency of the induced current flowing through the detection winding 13c changes in accordance with the weight applied from the loading platform 9 side. As a result, a weight signal having a frequency corresponding to the weight applied from the loading platform 9 side is generated. Is configured to occur between both ends.

The measurement of the loaded weight of the vehicle 1 based on the weight signals output from the sensors 13 is performed by a microcomputer (hereinafter abbreviated as a microcomputer) in the display unit 15 shown in a front view in FIG. And 17).

On the front surface 15a of the display unit 15,
A display 15b for displaying the measured weight, an overload display lamp 15c for displaying that the measured load weight exceeds a predetermined maximum load weight, an alarm buzzer 15d for informing the overload state, and an overload weight value setting A key 15e and a numeric keypad 15f are provided.

The microcomputer 17 has a CPU (Central Processing) as shown in the block diagram of the electrical configuration in FIG.
Unit, central processing unit) 17a and RAM (Random Acce
ss Memory) 17b and ROM (Read-Only Memory) 1
7c.

In addition to the RAM 17b and the ROM 17c, the CPU 17a has a nonvolatile memory (hereinafter abbreviated as NVM) which does not lose stored data even when the power supply is cut off.
19, each sensor 13, display 15b, overload display lamp 15c, alarm buzzer 15d, overload weight setting key 15e, numeric keypad 15f, data input / output terminal 15
g, and a travel sensor 50 that generates a travel pulse in accordance with the travel of the vehicle 1 is connected.

The RAM 17b has a data area for storing various data and a work area used for various processing operations. The ROM 17c stores a control program for causing the CPU 17a to perform various processing operations. .

The NVM 19 (corresponding to gain value data holding means) has tables for offset adjustment values, characteristic correction values, and gain values for the weight signal output from each sensor 13, a weight conversion formula, and an overload. Weight value setting key 15
The overload weight value set by the operation of e is stored in advance.

The offset adjustment value is used to eliminate the variation in the frequency of the weight signal output when each sensor 13 outputs the weight "0", and the characteristic correction value is set to the loading capacity of the loading platform 9. This is for correcting the variation between the sensors 13 in the characteristic relating to the correlation between the load applied to the sensor 13 from the object and the weight signal output by the sensor 13 in accordance with the load. It is set for each.

Further, the gain value is used to correct the difference in the degree of the dispersion load applied from the load on the carrier 9 due to the difference in the arrangement of the sensors 13. Like the correction value, it is set for each sensor 13.

Next, the processing performed by the CPU 17a in accordance with the control program stored in the ROM 17c will be described with reference to the flowcharts of FIGS.

When the microcomputer 17 is activated by the start of power supply from a battery (not shown) and the program is started,
As shown in FIG. 6, the CPU 17a checks whether or not a travel pulse is input from the travel sensor 50 (step S1). If the travel pulse is input (Y in step S1), the process proceeds to step S1 until the input is stopped. Repeat.

On the other hand, when no travel pulse is input from the travel sensor 50 (N in step S1), the weight signals of the six sensors 13 respectively corresponding to the two front wheels 3a and the four rear wheels 3b are input. The frequency is determined (step S3), and the frequency of the determined weight signal of each sensor 13 is offset-adjusted by the offset adjustment value of the corresponding sensor 13 of the NVM 19 (step S3).
5).

Subsequently, each sensor 13 after the offset adjustment is performed.
Of the weight signal of the NVM 19 with the corresponding sensor 1
The characteristic is corrected based on the characteristic correction value for No. 3 (step S
7) Then, the frequency of the weight signal of each sensor 13 after the offset adjustment and the characteristic correction is changed to N in the calculation area.
The gain is adjusted based on the gain value of the corresponding sensor 13 of the VM 19 (Step S9).

Then, the sum of the frequencies of the weight signals of the sensors 13 after the offset adjustment, characteristic correction, and gain adjustment, that is, the total frequency is calculated (step S11).
From the calculated total frequency, the loaded weight is calculated using the weight conversion formula of the NVM 19 (step S13).

Subsequently, the calculated loading weight is determined by the NVM 19
Is checked (step S15), and if not (N in step S15), the overload display lamp 15c is turned off (step S17), and the process proceeds to step S23 described later. If it exceeds the value (Y in step S15), the overload indication lamp 1
5c is turned on (step S19), and the alarm buzzer 15d is sounded for a predetermined time (step S21).
Proceed to 23.

In step S23, as shown in FIG.
The load weight calculated in step S13 is displayed on the display 15
b, and it is confirmed whether or not the calculated load weight output request signal has been input via the data input / output terminal 15g (step S25).

If the calculated load weight output request signal has not been input (N in step S25), the flow advances to step S29 described later. If the signal has been input (Y in step S25), the load weight calculated in step S13 is calculated. After outputting the calculated load weight signal shown through the data input / output terminal 15g (step S27), the process proceeds to step S29.

In step S29, the data input / output terminal 1
It is determined whether or not gain value update data has been input via 5g, and if it has not been input (step S29).
N), the process returns to step S1, and if the input is made (Y in step S29), the gain value of each sensor 13 of the NVM 19 is changed to the corresponding sensor 13 indicated in the input gain value update data. After updating to the gain value of (step S31), the process returns to step S1.

Therefore, in the loading scale 11,
While the vehicle 1 is stopped, the weight signal output from each sensor 13 is subjected to offset adjustment, characteristic correction, and gain adjustment, and thereafter, the loaded weight is calculated from the sum of the frequencies of each weight signal, The value is displayed on the display 15b, and when the calculated loaded weight exceeds the overloaded weight value of the NVM 19, the overloaded display lamp 15c is turned on and the alarm buzzer 15d sounds for a predetermined time.

In the weighing machine 11, the vehicle 1
When the calculated load weight output request is input from the outside via the data input / output terminal 15g while is stopped, the offset adjustment, the characteristic correction, and the gain adjustment from each sensor 13 are performed in response to the request. The load weight calculated from the total frequency of the weight signals is output to the outside as a calculated load weight signal.

Further, in the weighing scale 11, when gain value update data is input from outside while the vehicle 1 is stopped, each sensor 13 stored in the NVM 19
Is updated to the gain value of each sensor 13 indicated in the gain value update data input from the outside.

Next, reference numeral 21 in FIG.
There are a total of six weighing sensors 21 (only three halves are shown in FIG. 2) on which the four front wheels 3a and the four rear wheels 3b are mounted, and these six weighing sensors 21 are, for example, load cells. , And is configured to output an actual weight signal of a value corresponding to the weight from the placed front wheel 3a or rear wheel 3b.

Subsequently, reference numeral 30 in FIG. 2 denotes a weighing adjustment unit. The weighing adjustment unit 30 calculates the actual loading weight of the vehicle 1 based on the actual weight signal from each of the weighing sensors 21. Function and the weighing scale 11
Has the function of adjusting the gain value of each sensor 13 stored in the NVM 19 as a gain adjustment device according to the present invention.

As shown in the plan view of FIG. 8, the weighing adjustment unit 30 is provided with an operation panel 33 of the housing 31.
On top, temperature sensor 41, socket 4 for AC power cable
3. A power switch 45, a simple printer 47, a sensor connection terminal 49 to which the respective weighing sensors 21 are connected, a communication cable connection terminal 51, an external display connection terminal 53, a wireless antenna 55, and a notebook computer 61 are arranged. It is configured.

A receiver 57 (see FIG. 9) to which the wireless antenna 55 is connected is housed in the housing 31 of the weighing adjustment unit 30.

FIG. 9 is a block diagram showing the electrical configuration of the weighing and adjusting unit 30.
61a, RAM 61b, ROM 61c, keyboard 61
d and a display 61e.

The CPU 61a includes a RAM 61b, a ROM 61c, a keyboard 61d, and a display 6
1e, a temperature sensor 41, a simple printer 47, and a receiver 57 are connected, and further, a sensor connection terminal 49, a communication cable connection terminal 51, and an external display device connection via input / output terminals (not shown). Terminals 53 are connected to each other.

The RAM 61b has a data area for storing various data and a work area used for various processing operations. The work area includes the calculated load weight calculated by the load weight scale 11, A load weight storage area for storing the actual load weight calculated based on the actual weight signal from the weighing sensor 21 and a previous gain value storage area for storing the latest gain value of each sensor 13 determined last time are provided. The ROM 61c has a CPU
A control program for performing various processing operations is stored in 61a.

The AC power cable socket 4
3 is connected to the personal computer 61 and the receiver 57 via a power switch 45. The personal computer 61 and the receiver 57 are connected to the AC power cable socket 43 when the power switch 45 is turned on. It is configured to operate with a commercial power supplied from an AC power cable (not shown).

Further, the receiver 57 is configured to output a trigger reception notification signal when a remote controller (hereinafter abbreviated as “remote controller”) 59 receives a trigger signal wirelessly generated via a wireless antenna 55. Have been.

Next, the processing performed by the CPU 61a in accordance with the control program stored in the ROM 61c, in particular, the processing relating to the adjustment of the gain value of each sensor 13 of the weighing scale 11 will be described with reference to the flowchart of FIG.

When the power switch 45 is turned on, commercial power is supplied through the AC power cable socket 43 and an AC power cable (not shown) to start the personal computer 61. When the program is started, the CPU 61a operates from the keyboard 61d. It is checked whether or not there is a mode selection input for the gain value adjustment mode (step SA1). If there is no input (N in step SA1), step SA1 is repeated until there is an input. SA
(1) (Y), it is confirmed whether or not there is an input of vehicle specification data from the keyboard 61d (step SA3).

If there is no vehicle specification data input from the keyboard 61d (N in step SA3), step SA3 is repeated until there is an input, and if there is an input (Y in step SA3), a trigger from the receiver 57 is issued. It is confirmed whether or not a reception notification signal has been input (step SA).
5).

If there is no trigger reception notification signal from the receiver 57 (N in step SA5), step SA5 is repeated until there is an input, and if there is an input (Y in step SA5), the communication cable is connected. After outputting the calculated load weight output request signal via the terminal 51 (step S
A7) It is checked whether or not the calculated loading weight signal has been input via the communication cable connection terminal 51 (step SA).
9).

If the calculated load weight signal has not been input (N in step SA9), step S is performed until the signal is input.
A9 is repeated, and if it is input (step SA9
Y), each weighing sensor 21 via the sensor connection terminal 49
The actual load signal of the vehicle 1 is calculated based on the actual weight signal from each weighing sensor 21 (step SA13).

The calculation of the actual loading weight of the vehicle 1 in step SA13 is based on the weight of the loading weight "0" of the vehicle 1 specified at the time of inputting the vehicle specification data from the keyboard 61d in step SA3, that is, the vehicle 1
Is subtracted from the total weight of the vehicle 1 determined by the actual weight signal from each weighing sensor 21.

In the following step SA15, the vehicle 1 indicated by the calculated loading weight signal input in step SA9
The calculated loading weight and the actual loading weight of the vehicle 1 calculated in step SA13 are temporarily stored in the loading weight storage area of the RAM 61b. Then, in step SA5, the trigger reception notification signal from the receiver 57 is output. It is checked whether or not the number of times X that the input has been confirmed has reached the predetermined number of times X ₀ (step SA17).

If the number X of times of input confirmation of the trigger reception notification signal has not reached the predetermined number X ₀ (N in step SA17), the process returns to step SA5, and if the number X has reached the predetermined number X ₀ (Y in step SA17). ), And proceeds to step SA19 described later.

In step SA19, the contents of the vehicle specification data input from the keyboard 61d in step SA3, the latest gain value of each sensor 13 previously determined stored in the previous gain value storage area of the RAM 61b, and the past predetermined value Every time the trigger reception notification signal is input for the number of times X ₀ , the input is confirmed in step SA9, and the calculated load weight calculated by the load weight meter 11 indicated by the calculated load weight signal and the past predetermined number of times X ₀ . A new gain value for each sensor 13 is individually calculated based on the actual load weight of the vehicle 1 calculated in step SA13 every time the trigger reception notification signal is input.

Next, the stored value of the previous gain value storage area of the RAM 61b is updated to the gain value of each sensor 13 determined in step SA19 (step SA21), and the gain value indicating the calculated gain value of each sensor 13 is updated. After outputting the data via the communication cable connection terminal 51 (step SA23), subsequently, the information on which the new gain value of each sensor 13 was determined in step SA19 was measured by the temperature sensor 41. The temperature is displayed on the display 61e together with the temperature, and printed out by the simple printer 47 (step SA25).

[0060] Then, and temporarily stored in load weight storage area RAM61b, it erases the actual load weight and the load weight on the calculation of a predetermined number X ₀ minute of the vehicle 1 (step SA2
7) Then, a series of processing ends.

As is clear from the above description, in the present embodiment, the calculated loading weight collecting means 61A in the claims is used.
Is composed of steps SA7 and SA9 in the flowchart of FIG.
Is constituted by step SA11 in FIG. 10, the actual load weight calculating means 61C is constituted by step SA13 in FIG. 10, and the gain value determining means 61D is constituted by step SA11 in FIG.
19.

In the present embodiment, the trigger means A in the claims comprises a remote controller 59, a radio antenna 55 and a receiver 57, and the arrangement pattern data setting means B
Are composed of a keyboard 61d and step SA3 in FIG. 10, and the arrangement pattern data corresponds to the sensor arrangement pattern input from the keyboard 61d.

Next, the NV of the loading weighing scale 11 by the weighing adjustment unit 30 of the present embodiment configured as described above is used.
The operation (action) related to the adjustment of the gain value of each sensor 13 stored in M19 will be described.

First, the front wheels 3a of the vehicle 1 with the loading platform 9 emptied
And the rear wheel 3b are placed on each of the weighing sensors 21, and each of the weighing sensors 21 is connected to the sensor connection terminal 49.
A communication cable (not shown) connects between the data input / output terminal 15g of the weighing scale 11 and the communication cable connection terminal 51 of the weighing adjustment unit 30.

When the power switch 45 of the weighing adjustment unit 30 is turned on, the display 6 of the personal computer 61 is turned on.
1e, a screen requesting a mode selection input is displayed. Here, a gain value adjustment mode is selected and the keyboard 6 is selected.
When the input is made by 1d, data on the specifications of the vehicle 1, such as the number of axes of the front wheels 3a and the rear wheels 3b of the vehicle 1, the maximum load capacity, and the arrangement of the sensors 13, that is, input of vehicle specification data is displayed on the display 61e. Is displayed.

In response to the request, for example, the vehicle 1 is selected from a plurality of options displayed on the display 61e.
Is selected and input from the keyboard 61d, the operation in the gain value adjustment mode is started, and a dummy load (not shown, for example, weight per piece) on the carrier 9 is displayed on the display 61e. 2 tons) are loaded one by one until the total weight reaches the maximum loading capacity of the vehicle 1, and then an instruction screen is displayed which indicates that the dummy loads are to be unloaded one by one from the loading platform 9.

When the trigger signal is generated wirelessly by operating the remote control 59 after the instruction screen is displayed, the weighing signal from each weighing sensor 21 in a state where no dummy load is loaded on the loading platform 9 is obtained. Is a personal computer 61
And the actual loading weight of the vehicle 1 is calculated, and is calculated from the loading weight meter 11 based on the weight signal from each sensor 13 and the gain value of each sensor 13 held by the NVM 19. The calculated loading weight signal indicating the calculated loading weight of the vehicle 1 is taken into the personal computer 61, and the actual loading weight and the calculated loading weight of the vehicle 1 are stored in the RAM.
61b is temporarily stored.

Subsequently, one dummy load is placed on the loading platform 9 by using a forklift (not shown) or the like, and then, when the remote controller 59 is operated to generate a trigger signal wirelessly, the loading of the loading platform 9 is performed. The weighing signal from each weighing sensor 21 in the state where one dummy load is placed is taken into the personal computer 61 to calculate the actual load weight of the vehicle 1, and the load weight meter 11 outputs the respective sensor 13 The calculated loading weight signal indicating the calculated loading weight of the vehicle 1 calculated based on the weight signal and the gain value of each sensor 13 held by the NVM 19 is taken into the personal computer 61, and the actual And the calculated loading weight are R
It is temporarily stored in the AM 61b as before.

Thereafter, each time a dummy load is placed on the loading platform 9 one by one by a forklift or the like,
Until the dummy load on the loading platform 9 reaches the maximum load capacity, the weighing signal is taken in from each weighing sensor 21 by the operation of the remote control 59, the calculated load weight signal is taken in from the load weighing scale 11, and the A series of operations including temporary storage of the actual load weight and the calculated load weight in the RAM 61b are repeated.

Further, after the above-described series of operations after the dummy load on the loading platform 9 reaches the maximum loading capacity, the dummy loading products are lowered one by one from the loading platform 9 by a forklift or the like, and the remote controller 59 is placed there. To perform the above-described series of operations, and thereafter, this operation is repeated until there is no dummy load on the loading platform 9.

When the series of operations associated with the operation of the remote controller 59 after the dummy load on the loading platform 9 is exhausted is completed, the calculation of the vehicle 1 for the predetermined number of times X ₀ stored in the RAM 61b so far is completed. Loading weight and actual loading weight, and
The gain value of each sensor 13 is calculated based on the vehicle specification data of the vehicle 1 selected and input according to the display of the input request screen of the display 61e, and the calculated gain value of each sensor 13 is calculated. Is updated via the communication cable connection terminal 51.
1 is output.

Therefore, in the weighing machine 11, in response to the gain value update data being input from the weighing adjustment unit 30, each sensor 1 stored in the NVM 19 is received.
3 is updated to the gain value of each sensor 13 indicated in the input gain value update data,
Subsequent calculation of the loaded weight of the vehicle 1 based on the weight signal from the sensor 13 is performed using the updated gain value of each sensor 13 of the NVM 19.

As described above, according to the weighing adjustment unit 30 of the present embodiment, when the remote controller 59 is operated, the loading is performed in response to the trigger reception notification signal from the receiver 57 that has received the trigger signal from the remote controller 59. The vehicle 1 calculated based on the weight signal from each sensor 13 in the weight scale 11
Calculated loading weight signal indicating the calculated loading weight and the weighing signal from each weighing sensor 21 are taken in, and based on the taken-in weighing signal and the vehicle specification data about the vehicle 1 set and inputted earlier, The gain value of each sensor 13 is determined, and the gain value update data indicating the determined gain value of each sensor 13 is output to the weighing scale 11 via the communication cable connection terminal 51.

For this reason, the calculated load weight of the vehicle 1 calculated based on the weight signal from each sensor 13 in the load weight meter 11 and the two front wheels 3a and the four rear wheels 3 of the vehicle 1
b is compared with the actual load weight of the vehicle 1 weighed by the weighing adjustment unit 30 using the total of six weighing sensors 21 on which each of the sensors 13 is mounted, and a gain value used for each sensor 13 in the weighing scale 11. In determining
Importing the calculated loading weight signal from the loading weight meter 11,
Tasks such as reading the load weight displayed on the display 15b of the display unit 15 of the load weighing scale 11 by fully automating the capture of the weighing signal from each weighing sensor 21 and the determination of the gain value of each sensor 13. , And the operation of adjusting the gain value of the sensor 13 can be reliably performed by a small number of persons.

Further, the weighing adjustment unit 30 of the present embodiment
According to this, every time a dummy load is loaded on the loading platform 9 one by one starting from a state in which nothing is loaded on the loading platform 9, the calculated loading weight signal is taken in from the loading weighing scale 11, and each weighing sensor 21 is loaded. Each time the dummy weights on the loading platform 9 are taken down, one after another, the total weight of the dummy loading products on the loading platform 9 reaches the maximum loading capacity of the vehicle 1. Then, the loading of the calculated loading weight signal from the loading weight meter 11 and the loading of the weighing signal from each of the weighing sensors 21 are performed each time. The gain of each sensor 13 is obtained by using all of the calculated loading weight of the vehicle 1 indicated by the calculated loading weight signal taken up to and the actual loading weight of the vehicle 1 calculated by the weighing signal from the weighing sensor 21. Determine the value It was constructed.

Although the above-described configuration may be omitted, by adopting this configuration, when the weight of the load on the loading platform 9 increases due to the effect of the hysteresis characteristic, the weight signal output from the sensor 13 changes. It is advantageous because the gain value of the sensor 13 can be calculated in consideration of the effect of the hysteresis characteristic even when the difference is reduced.

Further, the weighing adjustment unit 3 of the present embodiment
According to 0, data concerning the specifications of the vehicle 1 such as the number of axes of the front wheels 3a and the rear wheels 3b of the vehicle 1, the maximum load capacity, and the arrangement of the sensors 13, which are input by the keyboard 61d in response to the display on the display 61e. That is, using the vehicle specification data, together with the calculated loading weight of the vehicle 1 indicated in the calculated loading weight signal and the actual loading weight of the vehicle 1 calculated by the weighing signal from the weighing sensor 21, The configuration is such that the gain values of the six sensors 13 disposed between the wheels 3a and 3b of the vehicle 1 and the carrier frame 5 are individually calculated.

Although the above-described configuration may also be omitted, by adopting this configuration, even if the characteristics are different for each sensor 13, or due to the difference in arrangement in the vehicle 1 for each sensor 13. Even if the degree of weight applied from the load on the loading platform 9 is different, it is advantageous because individual gain values corresponding to the respective sensors 13 can be calculated.

In this embodiment, the remote controller 59, the wireless antenna 55 and the remote control 59 are used as means for setting the timing of taking in the calculated loading weight signal from the loading weight scale 11 and taking in the weighing signal from each weighing sensor 21. Receiver 5
However, these may be replaced with, for example, an input from the keyboard 61d of the personal computer 61.

However, as in this embodiment, the remote controller 59
And the like, the timing of taking in the calculated loading weight signal from the weighing scale 11 and taking in the weighing signal from each of the weighing sensors 21 can be set within the range where the trigger signal from the remote controller 59 can reach wirelessly. Since the setting can be performed at a position distant from the antenna 55, the staff for setting the take-in timing among the staff required for performing the adjustment work of the gain value can be shared by, for example, the operator of the forklift. This is advantageous because it can be reduced.

Further, the present invention is not limited to the case where the gain values of the six sensors 13 arranged at different locations of the vehicle 1 are adjusted as in the present embodiment, but using a single or a plurality of sensors. It goes without saying that various load scales for calculating the load weight of the vehicle 1 can be widely applied to the case where the gain value of the sensor is adjusted.

Further, in the loading weighing scale for which the gain value is to be adjusted by the loading weighing scale gain adjusting device of the present invention, the configuration of how to update the gain value to the new gain value after the adjustment is described in this embodiment. It is needless to say that the present invention is not limited to the configuration described in the embodiment, but is optional.

[0083]

As described above, according to the gain adjusting device for a weighing scale according to the first aspect of the present invention, the sensor for measuring the weighing weight, which is disposed on the portion of the vehicle supporting the platform, outputs an output. A gain signal of a value corresponding to the weight from the load on the loading platform is corrected by a gain value held in gain value data holding means, and the vehicle is calculated based on the weight signal after the gain correction. An apparatus for adjusting the gain value to be held by the gain value data holding means, the apparatus being connected to a load scale for calculating the load weight, and calculating the calculated load weight of the vehicle calculated by the load scale. And a weighing signal collecting means for collecting a weighing signal output from a weighing sensor on which the vehicle is mounted and corresponding to a load applied to the weighing sensor. A trigger for setting the timing at which the calculated load weight collecting means collects the calculated load weight of the vehicle from the load scale and the timing at which the weighing signal collecting means collects the weighing signal from the weighing sensor. Means, an actual load weight calculating means for calculating an actual load weight of the vehicle based on the weighing signal collected by the weighing signal collecting means from the weighing sensor, and the calculated load weight collecting means is calculated by the trigger means. The calculated loading weight of the vehicle collected from the weighing scale at a set timing, and the weighing signal collected by the weighing signal collecting means from the weighing sensor at a timing set by the trigger means. The gain value data holding means holds the gain based on the actual load weight of the vehicle calculated by the actual load weight calculation means. And configured to include a gain value indexing means to determine the emission values.

Therefore, at the timing set by the trigger means, collection of the calculated load weight of the vehicle calculated by the load weight meter from the load weight meter by the calculated load weight collection means, and collection of the weighing signal The weighing signal from the weighing sensor is collected by the means, and as a result, at the timing set by the trigger means, the actual load weight calculation based on the weighing signal from the weighing sensor collected by the weighing signal collecting means. The actual load weight of the vehicle is calculated by the means, and the gain value of the sensor to be held by the gain value data holding means based on the calculated load weight of the vehicle and the actual load weight of the vehicle is calculated. Is
This is performed by the gain value determining means.

Therefore, the loading of the actual loading weight of the vehicle based on the loading of the weighing signal from the weighing sensor and the loaded weight signal, which has conventionally been performed manually,
In addition, the calculation of the loaded weight in the calculation of the vehicle based on the weight signal output by the sensor and the calculation of the gain value suitable for the sensor based on these are all automated, thereby adjusting the gain value of the sensor. It can be performed reliably with a small number of personnel.

Further, according to the gain adjusting device for a weighing scale of the present invention described in claim 2, the gain value deriving means includes a plurality of the calculated loading weight collecting means set by the trigger means. Based on the calculated loading weight of the plurality of vehicles collected from the loading weighing machine at the timing and the weighing signal collected from the weighing sensor at the plurality of timings set by the weighing signal collection means by the trigger means. The gain value to be held by the gain value data holding means is calculated based on the actual load weights of the plurality of vehicles calculated by the actual load weight calculation means.

For this reason, for example, when a plurality of timings are set by the trigger means while increasing or decreasing the weight of the load on the loading platform, the value of the actual load weight of the vehicle calculated from the weighing signal output from the weighing sensor and the sensor become The calculated load weight value of the vehicle calculated from the output weight signal is sampled plurally while the weight of the load on the bed is increasing or decreasing, and a plurality of values are sampled when the weight of the load on the bed is different. The gain value to be set for the sensor is determined by the gain value determining means based on the sample.

Therefore, even if the change in the value of the weight signal output from the sensor is different depending on the effect of the hysteresis characteristic when the weight of the load on the loading platform increases and decreases, the sensor taking into account the effect of the hysteresis characteristic is considered. The gain value can be determined by the gain value determining means.

According to a third aspect of the present invention, the sensors are arranged at a plurality of portions supporting a bed of the vehicle, and the gain value data holding means is provided. The gain values of the respective sensors are individually held, and a plurality of weight signals output by the plurality of sensors are respectively corresponded to the respective sensors held by the gain value data holding unit by the loading weighing scale. By performing gain correction by the respective gain values, the calculated loading weight of the vehicle is calculated based on the weight signals from the sensors after the gain correction, and indicates an arrangement pattern of the plurality of sensors in the vehicle. The apparatus further comprises an arrangement pattern data setting means for inputting and setting arrangement pattern data, wherein the gain value calculating means includes the calculation loading weight collecting means and the triggering means. Based on the calculated loading weight of the vehicle collected from the weighing scale at the timing set by the weighing signal collected from the weighing sensor at the timing set by the trigger means by the weighing signal collecting means. The gain value data holding means based on the actual load weight of the vehicle calculated by the actual load weight calculation means and the arrangement pattern of the plurality of sensors in the vehicle set by the arrangement pattern data setting means. In this configuration, the gain value of each of the sensors to be held is calculated individually.

For this reason, when the sensors are arranged in a plurality of portions supporting the loading platform of the vehicle, even if the characteristics are different for each sensor, or even if the sensors are arranged differently in the vehicle for each sensor, Even if the degree of weight application from the upper load differs, individual gain values corresponding to the respective sensors can be determined by the gain value determining means.

[Brief description of the drawings]

FIG. 1 is a basic configuration diagram of a gain adjustment device for a weighing machine according to the present invention.

FIG. 2 is a schematic configuration diagram showing a situation when gain adjustment of a weighing scale is performed using the gain adjustment device according to the present invention.

FIG. 3 is a perspective view of the sensor of FIG. 2;

FIG. 4 is a front view of a display unit of the weighing scale of FIG. 2;

FIG. 5 is a block diagram illustrating an electrical configuration of a microcomputer provided in the display unit in FIG.

6 is a flowchart showing a process performed by a CPU according to a control program stored in a ROM of the microcomputer of FIG.

7 is a flowchart showing a process performed by a CPU according to a control program stored in a ROM of the microcomputer of FIG.

FIG. 8 is a plan view of the weighing adjustment unit according to the embodiment of the present invention shown in FIG. 2;

FIG. 9 is a block diagram illustrating an electrical configuration of the weighing adjustment unit of FIG. 8;

FIG. 10 is a flowchart showing processing performed by a CPU in accordance with a control program stored in a ROM of the personal computer of FIG. 9 for adjusting a gain value of each sensor of the weighing scale of FIG. 2;

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 vehicle 9 loading platform 11 loading weight scale 13 sensor 19 gain value data holding means 21 weighing sensor 61 personal computer 61a CPU 61b RAM 61c ROM 61A calculation loading weight collection means 61B weighing signal collection means 61C actual loading weight calculation means 61D gain value division Output means A Trigger means B Layout pattern data setting means

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G01G 23/01 G01G 19/12 G01G 23/37 B60P 5/00

Claims (3)

(57) [Claims] 1. A gain value data holding unit holds a weight signal output from a load weight measurement sensor disposed at a portion of a vehicle supporting a loading platform, the weight signal having a value corresponding to the weight of the loading product on the loading platform. Gain is corrected by the gain value
An apparatus for adjusting the gain value, which is connected to a loading weight scale that calculates a calculated loading weight of the vehicle based on the weight signal after the gain correction, and that is held by the gain value data holding unit, A calculated load weight collecting means for collecting from the load scale a calculated load weight of the vehicle calculated by the load scale, and a load applied to the weighing sensor output from the weighing sensor on which the vehicle is mounted Weighing signal collecting means for collecting a weighing signal according to the timing; timing at which the calculated load weight collecting means collects the calculated load weight of the vehicle from the load weighing scale; and Trigger means for setting a timing for collecting the weighing signal from the weighing signal; and an actual vehicle of the vehicle based on the weighing signal collected by the weighing signal collecting means from the weighing sensor. Actual load weight calculating means for calculating the load weight; and the calculated load weight of the vehicle collected from the load scale by the calculated load weight collecting means at a timing set by the trigger means; and the weighing signal collection. Means for holding the gain value data based on the actual load weight of the vehicle calculated by the actual load weight calculation means based on the weighing signal collected from the weighing sensor at a timing set by the trigger means. Gain value calculating means for calculating the gain value held by the means. 2. The method according to claim 2, wherein the gain value calculating unit calculates a calculated load weight of the plurality of vehicles collected from the load scale at a plurality of timings set by the calculated load weight collecting unit. The actual load weights of the plurality of vehicles calculated by the actual load weight calculating means based on the weighing signals collected from the weighing sensors at a plurality of timings set by the triggering means by the weighing signal collecting means. 2. The gain adjusting device for a weighing scale according to claim 1, wherein the gain value to be held by the gain value data holding means is calculated based on the following. 3. The load weighing machine according to claim 1, wherein the sensors are respectively arranged in a plurality of portions supporting a bed of the vehicle, and the gain value data holding means individually holds gain values of the sensors. By correcting the plurality of weight signals respectively output by the plurality of sensors by the gain values corresponding to the respective sensors held in the gain value data holding means, the calculated load weight of the vehicle is calculated. Further comprising arrangement pattern data setting means, which is calculated based on the weight signals from the sensors after the gain correction, and inputs and sets arrangement pattern data indicating an arrangement pattern of the plurality of sensors in the vehicle, wherein the gain value Indexing means for calculating the vehicle weight collected from the load weight meter at the timing set by the calculated load weight collecting means by the trigger means; The actual loading weight of the vehicle calculated by the actual loading weight calculation means based on the calculated loading weight and the weighing signal collected from the weighing sensor at the timing set by the trigger means by the weighing signal collection means. 2. A gain value of each of the sensors to be held by the gain value data holding unit is individually determined based on a weight and an arrangement pattern of the plurality of sensors in the vehicle set by the arrangement pattern data setting unit. Or 2
The gain adjusting device for a weighing machine according to the above description.