JPS5819051B2 - You can't get enough of this. - Google Patents

Description

[Detailed description of the invention] This invention measures the amount of material remaining in the container using an electronic scale.

The present invention relates to a measuring/recording device for measuring and recording the remaining amount of material to be filled in a container, which measures and records the measured value using a printing device such as a printer linked to an electronic scale.

For example, a used propane gas cylinder (hereinafter referred to as

When measuring the remaining amount of gas in a container (referred to as a container) with an electronic scale and printing and recording the remaining amount with a printing device, the tare weight of the container must be subtracted before weighing. It is troublesome to set the actual tare weight on an electronic scale, and it is actually the average tare weight of the container.

It is preferable to set the value only once to speed up the weighing process.

However, when the average tare weight is set, if the container has a tare weight lighter than the average tare weight and the remaining gas amount is approximately zero, the measured remaining gas amount will be negative.

In other words, the difference between the average tare weight and the actual tare weight of the container will result in a negative remaining amount, and if this negative remaining amount is printed and recorded by a printing device, the total remaining amount will be inaccurate, and it may cause commercial problems. There is a possibility that trouble may occur.

This invention improves and eliminates the above drawbacks, and when the remaining amount in the container is measured as negative, the printing device prints and records this negative remaining amount value as zero g, and When the electronic scale is in an empty state, that is, in an unloaded state, no printing or recording is performed within a certain range of ± around this state position.

An embodiment of the present invention will be described below based on the drawings.

1. The output of an A/D converter 1 that converts an analog displacement amount into a pulse that is a digital displacement amount is connected to each input of a first addition/subtraction discrimination circuit 2 and a second addition/subtraction discrimination circuit 3. The output of the first addition/subtraction determining circuit 2 is connected to the input of a first counter 40, and the output of this counter 4 is connected to each input of the weight display section 5 and the gate 6.

For example, the output of the tare weight setting section 7 operated by a switch such as a digital switch is connected to the other input of the first counter 4, and the signal of the count zero of this counter 4, that is, the zero signal a, is input to the first counter 4. 1 is connected to the other input of the addition/subtraction discrimination circuit 2, and furthermore, the gate control signal output from this addition/subtraction discrimination circuit 2 is connected to the other input of the gate 6, and the output of this gate 6 is connected to a printing device 8 such as a printer. Connect to the input of

The gate control signal S is controlled by the zero signal a of the first counter 4, that is, a flip-flop driven by the zero signal a is incorporated in the first addition/subtraction discrimination circuit 2, and the gate 6 is controlled from this flip-flop. It is designed to output gate control signals to open and close.

C is a stationary determination signal for determining whether the scale mechanism is stationary, and this signal is connected to the other input of the printing device 8.

Further, the output of the second addition/subtraction discrimination circuit 3 is outputted to a second counter 90.
Similarly to the first counter 4, the zero signal d of the second counter 9 is connected to the other input of the second addition/subtraction determining circuit 3.

Then, the print command signal e from the second counter 9 is connected to another input of the printing device 8.

This signal e is output when the count value of the second counter 9 is within a certain range centered around zero, for example, +IK2 to -IKP, and is output to the printing device 8 when it is outside this certain range to print. It is something that allows you to do this.

In other words, when the scale is in an empty state (no load) and the scale mechanism is slightly displaced by wind or vibration and comes to a standstill, or when the scale mechanism returns to its original position after weighing and comes to rest, it will not print. Then, the second counter 9 detects the non-printing range.

The polarities of the outputs of the first and second addition/subtraction discrimination circuits 2.3 are controlled by the arrival of the zero signals a, d of the first and second counters 4, 9.

The operation of the present invention constructed as described above will be described next.

First, the tare weight of the container is set in the tare weight setting section 7.

Then, along with this setting operation, the second counter 9 is set to zero, the set tare weight is stored in the first counter 4, and the tare weight is displayed on the weight display section 5, for example, -10.
is displayed with a minus sign, such as 2.

Next, when the container is placed on an electronic scale and the remaining amount is measured, a pulse proportional to the total weight of the container and the remaining amount is sent out from the A/D converter 1 as shown in Figure 2A. The pulses are counted by the first and second counters 4.9 (Fig. 2, c), and the counted value of the first counter 4 is displayed as a weight on the weight display section 5.

The gate 6 is not opened until the count value of the first counter 4 becomes zero. In other words, the signal to open the gate 6 is not output from the first addition/subtraction discrimination circuit 2 until the first counter 4 outputs the zero signal a ( 2), the output of the gate 6 is zero g regardless of the count value of the first counter 4.

When the count value of the first counter 4 is subtracted and becomes zero, that is, when the tare weight is subtracted, a zero signal a is sent to the first addition/subtraction discrimination circuit 2, and from this circuit 2 a gate control signal is sent to open the gate 6. Exit and gate 6 will be opened (Figure 2 2)
.

When the gate 6 is opened, the count value of the first counter 4, that is, the weight value, is sent as is to the printing device 8.

On the other hand, the count value of the second counter 9 is empty (
(No load) When the value is within a certain range nearby, this counter 9 outputs a print command signal e. When the second counter 9 counts a value outside this certain range, it is as shown in Figure 2 E. A printing command signal e is always sent to the printing device 8.

Then, when the stationary determination signal C that detects the stationary state of the scale mechanism while the printing command signal e is being output is sent to the printing device 8, the printing device 8 prints and records the weight value sent from the gate 6.

After measuring and recording the remaining amount of the filling material in the container in this way, when the container is removed from the electronic scale, the scale mechanism returns to its original position and the first and second counters 4 and 9 perform subtraction. Then, with the zero signal a of the first counter 4, the output polarity of the first addition/subtraction determining circuit 2 is inverted, and the gate 6 is closed, so that the output becomes zero g.

Then, the scale mechanism returns to its original position, that is, empty (no load).
When the machine returns to its original state and comes to rest, the counted value of the first counter 4 becomes equal to the initially set tare/weight, and this value is displayed on the weight display section 5 with a minus sign attached.

At this time, the count value of the second counter 9 becomes zero again and becomes a value within the print prohibition range, and the print command signal e is no longer output (FIG. 2(e)).

On the other hand, the stationary determination signal C of the scale mechanism is sent to the printing device 8, but since the printing command signal e is not output, the printing device 8 does not perform printing/recording operations.

Further, even if the scale mechanism is slightly displaced due to wind or vibration, if the count value of the second counter 9 is within the above-mentioned certain range, the printing command signal e is not output, so the printing device 8 does not perform a printing operation.

The above will be explained using numerical examples as follows.

When the certain range in which printing is prohibited is set to -1 Kp to +l KP, the tare weight is set to 10 Kg, and a container with an actual tare weight of 9.5 KP is weighed with 0 g remaining, the i weight display section 5
-0.5 Kt is displayed, but since the gate 6 is closed, the output of the gate 6 is 0 g, and the printer 8 prints and records the remaining amount as 0 g.

Furthermore, when a container with a tare weight of 10 kg is weighed with a remaining amount of 0.1 KP, the weight display section 5 shows 0. I Kp is displayed, and since the gate 6 is open, the printing device 8 shows that there is 0.1 Kp remaining! i' is printed/recorded.

As explained above, this invention prints and records negative weight as 0g, and does not print or record within a certain range of empty (no load) state, so When measuring the remaining amount of the material to be filled and printing/recording this remaining amount, there is no need to set the actual tare weight for each container each time you weigh it, and you only need to set the average tare weight once. Therefore, it is possible to speed up the weighing process, and it is also accurate and easy to tally the remaining amount printed and recorded.It also has the effect of eliminating troubles in commercial transactions. It is very useful as a recording device.

[Brief explanation of the drawing]

FIG. 1 is a block circuit diagram showing an embodiment of the present invention, and FIG. 2 is an explanatory diagram of the operation of the same circuit diagram. 1... A/D converter, 4... First counter, 5...
...Weight display section, 6...Gate, 7...Tare weight setting section, 8...Printing device, 9...Second counter, a
, d... Zero signal, b... Game 1-i1J control signal,
C: Stationary judgment signal, e: Print command signal.

Claims (1)

[Claims] 1 It has a function of converting a negative weighing value into a zero g signal, a function of issuing a signal that prohibits printing within a certain range near the empty (no load), and a stationary judgment signal of the weighing mechanism. The inside of the container is characterized in that it is composed of an electronic scale having a function of outputting , and a printing device that inputs each signal from the three functions mentioned above, and is configured to print and record a negative weighing value as 0 g. A device for measuring and recording the remaining amount of material to be filled.