JPH05340795A - Electronic balance weight setting device - Google Patents

Abstract

PURPOSE:To reduce the kinds of weights and reduce the labor of operating keys at the time of setting a tare weight, etc., by using a simple electronic balance equipped no ten keys and, at the same time, to set the tare weight in a short time. CONSTITUTION:An actual weight calculating means 3 finds an actual weight measured with a weight detecting means 1, such as a load cell. A corrected weight calculating means 6 finds a corrected weight by correcting the actually measured weight by using addition and subtraction information DELTAW+ and DELTA-from an up-key 12 and down-key 13. When a tare weight key 14 is pressed, the above-mentioned corrected weight is set as a tare weight.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic scale weight setting device for setting tare weight, target weight and the like.

[0002]

2. Description of the Related Art In a high-class electronic scale, for example, when setting a target weight, the target weight is set by inputting with a ten-key pad. However, the cost of the electronic scale increases because the numeric keypad is provided. Therefore, in a simple electronic scale, the target weight or the like is set by one of the following two methods.

One of them is to prepare a large number of weights according to the target weight in advance, and place one of them on an electronic scale,
This is an actual weight setting method in which the target weight is set by pressing the target weight key. However, in this actual weight setting method, it is necessary to prepare a large number of weights corresponding to the number of target weights, that is, the types of products, and a storage place for the weights, and the management of the weights is troublesome.

The other is to provide an up key and a down key, and
This is an up / down method in which the target weight is set by pressing the up key continuously from 0g to the target weight by operating the key and the down key, and then pressing the target weight key. However, in the up / down method, since the up key is continuously pressed until the target weight reaches from 0 g, the key operation is troublesome and it takes time to set the target weight.

This kind of problem occurs not only in setting the target weight but also in setting the allowable upper limit weight and lower limit weight. Also, regarding the tare weight, a similar problem occurs in a scale or the like.

The present invention has been made in view of the above-mentioned drawbacks of the prior art, and when the tare weight or the like is set by a simple electronic scale without a numeric keypad, the number of types of weights is reduced and the key operation is troublesome. An object of the present invention is to provide a weight setting device that can reduce the weight and set the weight in a short time.

[0007]

In order to achieve the above object, the present invention provides an actual weight calculating means for obtaining an actual weight of an object to be weighed based on an analog signal from the weight detecting means, and the actual weight. Is provided with a corrected weight calculating means for correcting the corrected weight with the addition / subtraction information from the up key and the down key to obtain a corrected weight, and a setting key for storing the corrected weight as a set weight.

[0008]

In the present invention, first, the actual weight obtained by mounting the weight is corrected by the adjustment information from the up key or the down key, so there is no need to prepare the weight for each product or tare type. There is no need to keep pressing the up key from 0g.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In FIG. 2, on the operation panel 10, in addition to the display 11 including a liquid crystal display panel, an up key 12, a down key 13, a tare key 14, a target key 15, an upper limit key 16,
Setting keys such as the lower limit key 17 are provided.

In FIG. 1, the weight detecting means 1 is composed of a load cell, for example, and outputs an analog signal a corresponding to a load to an A / D converting means 2 via an amplifier (not shown). The A / D conversion means 2 outputs a digital signal d obtained by converting the analog signal a into a digital amount to the actual weight calculation means 3. The actual weight calculation means 3 calculates the actual weight of the object to be weighed based on the digital signal d, that is, based on the analog signal a, and further performs display processing to display the indicator 11 (FIG. 2). To display. The actual weight calculation means 3 includes the actual weight memory 4, the corrected weight calculation means 6, the memory selection means 7, and the like, and the microcomputer 2
Built in 0.

The actual weight memory 4 includes an actual weight calculating means 3
The actual weight obtained in step S1 is stored, and the value is output as the weight signal w to the corrected weight calculator 6. The modified weight calculation means 6 includes a key input value register 61 and an addition / subtraction means 62. The addition / subtraction means 62 is up
Upon receiving the up signal Δw + from the key 12 or the down signal Δw- from the down key 13, the key input value register 6
The value (setting register) temporarily stored in 1 is updated by 1 weight unit (for example, 0.01 g). Further, the corrected weight calculating means 6 calculates the corrected weight by adding the weight signal w and the set register, that is, correcting the actual weight with the addition / subtraction information from the up key 12 and the down key 13. , And outputs the modified weight signal w1 to the memory selecting means 7.

Each of the up key 12 and the down key 13 outputs an up signal Δw + and a down signal Δw- each time the button is operated once, and when the buttons are continuously pressed, the signals Δw +, Δw− is continuously output.

The tare key 14, the target key 15, the upper limit key 16 and the lower limit key 17 are for selecting and storing the corrected weight as a set weight, and when the push buttons are operated, the tare signal sa and the target signal, respectively. The sb, the upper limit signal sc, and the lower limit signal sd are output to the memory selection means 7. The memory selection means 7 selects these selection signals sa, sb,
Upon receiving sc or sd and the modified weight signal w1,
In the tare weight memory 24, the target weight memory 25, the upper limit weight memory 26 or the lower limit weight memory 27, the corrected weight signal w
1 is output and the corrected weight is stored. For example, the memory selection means 7 receives the tare signal sa from the tare key 14 and outputs the corrected weight signal w1 to the tare weight memory 24, so that the corrected weight is stored in the tare weight memory 24 as the tare weight (set weight). Remember.

The stored tare weight is tared from the weight of the product when the object to be weighed (product) is weighed.
Further, the upper limit weight and the lower limit weight refer to values in consideration of the weight difference allowed with respect to the target weight.

Next, the operation of the above configuration will be described with reference to FIGS.
This will be described with reference to the flowchart of. In the main flow of FIG. 3, when the power is turned on, in step S1,
The setting register, that is, the value of the key input value register 61 of FIG. Subsequently, the process proceeds to step S2 of FIG. 3, and the object to be weighed is placed, and then the weighing process is performed. That is, FIG.
The weight detection means 1 of A outputs the analog signal a proportional to the load
The analog signal a is output to the / D conversion means 2 and converted into a weight value by the actual weight calculation means 3. Next, Fig. 3
In step S3, the display process for displaying the weight on the display 11 (FIG. 2) is performed. Subsequently, the process proceeds to step S4, the display value displayed on the display 11 (FIG. 2) is stored in the actual weight memory 4 of FIG. 1, and the key process of step S5 of FIG. 3 is performed.

The above key processing is performed according to the flow shown in FIG. If no key input is made in step S6 of FIG. 4, the process returns to step S2 of the main flow of FIG. On the other hand, if the key input is made in step S6 of FIG. 4, the process proceeds to step S7.

In steps S7 to S11, the entered key (the pressed key) is the up key 12, the down key 13, the tare key 14, the target key 15 or the upper limit key 1, respectively.
It is determined whether or not the value is 6 (FIG. 2), and as a result of the determination, if it is not the relevant key, the process proceeds to the next step. If the input key is not the lower limit key 17 (FIG. 2) in step S12, the process returns to step S5 of the main flow of FIG. There is another key process between steps S8 and S9 in FIG. 4, but since it has no special relation with the present invention, its description and illustration are omitted.

On the other hand, in step S7, the up key 12
If (FIG. 2) is pressed, the process proceeds to step S17. In step S17, the addition / subtraction means 62 of FIG. 1 receives the up signal Δw +, adds 1 to the value (setting register) of the key input value register 61, and the added value is stored in the key input value register 61. Then, the set cash register is updated.

Subsequently, the process proceeds to step S16 in FIG.
The corrected weight calculation means 6 of FIG. 1 calculates the corrected weight from the actual weight stored in the actual weight memory 4 and the set register temporarily stored in the key input value register 61, and the corrected weight signal w1. Is output to the memory selection means 7,
The corrected weight is displayed on the display (FIG. 2) and the process returns to step S6. The calculation of the modified weight is performed as follows. Modified weight = actual weight + (set register × weight unit) For example, when the actual weight is 30 g, the set register is 4, and the weight unit is 0.01 g, the revised weight is 30.04 g.

In step S8 of FIG. 4, the down key 13
If (FIG. 1) is pressed, the process proceeds to step S18. In step S18, the addition / subtraction means 62 of FIG.
Upon receiving w-, 1 is subtracted from the value (setting register) of the key input value register 61, and the subtracted value is stored in the key input value register 61, whereby the setting register is updated, and as described above. , And proceeds to step S16 in FIG.

If the tare key 14 (FIG. 1) is pressed in step S9, the process proceeds to step S19. In step S19, the memory selection means 7 of FIG.
The tare signal sa input from the
1 is output, the corrected weight is stored as the tare weight in the tare weight memory 24, and the process proceeds to step S23 in FIG.

Step S10, S11 or S12
If the target key 15, the upper limit key 16 or the lower limit key 17 (FIG. 1) is pressed in step S1, respectively, step S
In step S20 or S22, the corrected weight is similarly stored as the target weight, the upper limit weight or the lower limit weight in the target weight memory 25, the upper limit weight memory 26 or the lower limit weight memory 27 in FIG. move on.

In step S23, the setting register of the key input value register 61 of FIG. 1 is cleared to 0, and the process returns to the main flow of FIG. By repeating these operations, the tare weight, the target weight, etc. are set by the following operations.

In the following operation, the case of tare weight will be described as an example. Tare weight to be set is 10g to 30g
If there are 50 types in between, for example, 15g, 2
Three standard weights of 0 g and 25 g are prepared. If the tare weight to be set is 17.50 g, first place a weight of 15 g on the electronic scale. At this time, the display 11 of FIG. 2 displays 15.00 g. Continue pressing the up key 12 to display
When the value of 11 continuously increases by 0.01 g, and when it approaches 17.50 g, the up key 12 or the down key 13 is intermittently pressed to bring the display to 17.50 g. After that, when the tare key 14 is pressed, the corrected weight of 17.50 g is stored in the tare weight memory 24 of FIG. 1 as the tare weight. Then, when the weight is unloaded and the boxed (tare) packed product is placed on the electronic scale, the weight of the tared product is automatically displayed.

As described above, in this electronic scale, the corrected weight calculation means 6 increases the actual weight calculated by the actual weight calculation means 3.
Since the correction is made by the addition / subtraction information from the key 12 or the down key 13, the tare weight and the target weight can be set by using the weight together with the up key 12 and the down key 13. Therefore, it is possible to set the necessary weight by preparing several kinds of weights without preparing weights corresponding to many kinds of tare weights. Therefore, the number of weights is significantly reduced, the storage space for the weights is reduced, and the weights are easily managed. Since the upper limit weight and the lower limit weight are close to the target weight, the weight for that is not necessary.

On the other hand, after placing the weight, the up key 12
Since it is only necessary to press the up key 12 or the like, unlike the case where the up key 12 is continuously pressed from 0 g, the weight setting becomes simple and the time also becomes short. Further, unlike the one provided with a numeric keypad, the structure of the operation panel is simplified and the cost of the electronic scale is reduced.

In the above embodiment, the set weight is the tare weight, the target weight, the upper limit weight and the lower limit weight. However, in the present invention, the set weight may be any one of the above. The set weight may be other than the above.

[0028]

As described above, according to the present invention, the actual weight of the object to be weighed obtained by the actual weight calculating means is
Correct by adjusting information from the up key and down key,
Since the corrected weight is calculated and this corrected weight is used as the set weight,
Unlike electronic scales that use the numeric keypad, the structure of the operation panel is simple, and the weight can be set thin with the up key or down key, so you can reduce the weight and operate everything with the up key or down key. Unlike the case where the weight setting is performed, the weight setting can be performed in a short time without any trouble.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a weight setting device for an electronic scale showing an embodiment of the present invention.

FIG. 2 is a plan view showing an operation panel of the electronic scale.

FIG. 3 is a flowchart showing a main flow of weighing.

FIG. 4 is a flowchart showing a flow of weight setting.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Weight detection means, 3 ... Actual weight calculation means, 6 ... Corrected weight calculation means, 12 ... Up key, 13 ... Down key, 14-17
… Setting key, a… Analog signal.

Claims (1)

[Claims] 1. A weight detecting means for outputting an analog signal according to a load, an actual weight calculating means for obtaining an actual weight of an object to be weighed based on the analog signal, and an up key and a down key for the actual weight. A weight setting device for an electronic scale, comprising: a corrected weight calculation means for correcting the corrected weight by the addition / subtraction information from the key and a setting key for storing the corrected weight as a set weight.