JPS58117Y2 - electronic fare scale - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an electronic price scale that calculates the price of the object to be weighed by multiplying the measured value of the object by a preset unit price and digitally displays the price.

Conventionally, in general use, the measured value is difficult to remain completely stationary at one point, and oscillates around the weight value of the object to be measured depending on the surrounding conditions.

Therefore, the price of the object to be weighed displayed by the price scale is difficult to display in a fixed manner, and changes as the measured value changes.

Therefore, in order to avoid financial troubles with customers, a memory circuit with a timer circuit is provided, and when the operator determines that the measured value has reached a stable state, the timer circuit is activated.
The monetary value at that time was held and displayed for a certain period of time.

However, as long as the stored monetary value is within the timer setting time, the monetary value will continue to be displayed until the set time, even though the displayed monetary value is no longer necessary. On the other hand, even though the metering has not been completed and the displayed monetary value is still needed, when the timer setting time is reached, the above-mentioned storage is canceled.

Therefore, the operability was poor, and it was not accurate because the operator had to judge whether the measured value was in a stable state.

Therefore, the present invention solves the above-mentioned drawbacks and provides an accurate and reliable electronic fare scale.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 shows a block diagram of a toll scale. Reference numeral 1 denotes a weighing section, which comprises a load converting section 2 and a reversible counter 3, and outputs a weighing signal corresponding to a loaded load value.

As shown in FIG. 2a, 1), the load conversion unit 2 includes a mounting table 20 on which an object to be weighed is placed, a spring 21 that biases the mounting table 20 in a direction opposite to the downward direction of the mounting table 20, and a spring 21 for moving the mounting table 20. A slit plate 22 that moves up and down as the slit plate 22 moves up and down, and a first slit plate 22 that is arranged to receive light from a lamp 24 through a slit 23 of the slit plate 22. It is composed of second light receivers 25, 26, etc.

The mounting table 20 stops at a position where it has descended to a point where the weight placed on it and the biasing force of the spring 21 are equal.

Therefore, when the weight of the object to be weighed is heavy, the amount of descent of the mounting table is also large.

The amount of movement of the mounting table corresponding to the weight of the object to be weighed is detected by the first light receiver 25 as a pulse signal P1.

Furthermore, in order to determine the moving direction of the slit plate 22, the direction discrimination circuit 27 uses a second light receiver 25 disposed with a phase difference of 90° between the output pulse signal P of the first light receiver 25 and the first light receiver 25. input the pulse signal P2 of the light receiver 26 output of
It is determined whether the moving direction of the mounting table 20 is in the direction of increasing the weight value or in the direction of decreasing the weight value, and the first light receiver 25
The output of the pulse signal P1 is selectively controlled.

If the direction discrimination circuit 27 output signal determines that the weight is increasing, the pulse signal P1 is outputted as an up pulse that causes the reversible counter 3 to count up, and if it is determined that the weight value is decreasing, the pulse signal P1 is output as a down pulse that causes the weight value to count down. It is something that is output verbally.

Therefore, the reversible counter 3 that outputs a signal corresponding to the measured value outputs a measured signal corresponding to the load value loaded on the load converter 2.

A unit price setting section 4 outputs a unit price signal corresponding to the price per unit weight of the object to be weighed.

Reference numeral 5 denotes a storage section, which inputs the output signal of the reversible counter 3 of the measuring section 1, the storage command signal M, and the storage release signal R, and when the storage command signal M and storage release signal R are not generated, the output signal is inputted at regular intervals. The weighing signal output from the reversible counter 3 is repeatedly stored and output.

Further, when the storage command signal M is generated, the contents of the weight signal at the generation time are stored, and a constant value is held and output until the storage cancellation signal R is generated.

6 and 7 are a weight display section and a set unit price display section, respectively, which display the output signal of the storage section 5 and the output signal of the unit price setting section as values corresponding thereto.

Reference numeral 8 denotes an amount calculating section which inputs the unit price signal output from the unit price setting section 4 and the weight signal output from the storage section 5, and calculates the amount of the object to be weighed from the product of the weight signal and the contents of the unit price signal. It calculates and outputs a signal corresponding to the amount.

Reference numeral 9 denotes an amount display section, and an indicator 4 shows the output signal of the amount calculation section 8 corresponding to the amount of money.

10' is a bias detection unit which inputs the up/down pulse i of the output of the load conversion unit 2 and the weight signal to the output of the storage unit 5, and determines the state of the weight value. When a stable state is reached, a first logic level signal "C" is issued to the output terminal.

11 In the heavy object detection section, input the up pulse and down pulse ports of the 2 outputs of the priest conversion section, and when the unit price is displayed, the prescribed number of down pulse ports are input in succession on the screen. At this time, it is determined that the object to be weighed has been removed from the weighing device 's1, and a signal of logic level 1 is output.

A 31-point delay circuit delays the output signal of the object detection section 11 by a certain period of time and outputs the signal.

Reference numeral 12 denotes an AND gate, which outputs a storage command signal M to the storage section 5 when the data holding switch SW commands the holding of the weighing signal, and when the weighing value is in a stable state and the balance detection section 10 output signal is generated. do.

Note that the output signal of the weighed object detection section 11 acts as a memory release signal R to the storage section 5 via a delay circuit 31.

FIG. 3 is a block diagram showing the configuration of the balance detecting section 10, where A, B, and C are all up/down signals output from the load converting section 2.
Pulse and down pulse ports are input, and A detects that the object to be weighed is loaded on the load converter 2. When n up pulses are input in succession, logic level 1 is detected. Output a signal.

B outputs a signal of logic level 1 when the change in the measured value oscillates within the first time and consecutively 4 to 6 times.

C outputs a signal of logic level 1 when a completely stable state is reached with no up-pulse or down-pulse being manually applied within a specified time.

D inputs the weighing signal output from the storage section 5, compares the magnitude of the previous weighing signal and the current weighing signal, and outputs a signal of logic level 1 when the two match.

Therefore, the balance detection section 10 detects whether the object to be weighed is placed on the load change section 1 and the reversible counter 3 has stopped counting, or the amount of change is within the first fluctuation of the weight value displayed on the weight display section 6. It is determined that a stable state has been reached only when the occurrences occur continuously and the count values of the reversible counter 3 from the previous time and this time match, and a signal is automatically output and the reversible force counter 3 is stored in the storage unit 5. command to store the count value.

The storage in the storage unit 5 is cleared by the object detection unit 11 which detects that the object to be weighed has been removed from the load conversion unit 2 and outputs a signal.
Since the output signal is a signal passed through the delay circuit 31, the object to be signaled is transferred to the load converter 2. The memory contents are retained for a certain period of time even after being removed from the memory.

・・・（・ ・ 、 ・
Note that the delay time of the delay circuit 31 may be variable, such as □, -
A similar effect can be obtained.

As explained above, according to the present invention, a weighing signal is input,
Inputs the weight signal to the weight detection part (which determines the state of the weighing value and outputs a signal when it reaches a stable state),
a weighing object detection section that determines that the object to be weighed has been removed from the weighing section and outputs a signal when the weighing signal changes per unit time in a direction in which the weighing value decreases by more than a predetermined value; Input the weighing section output signal, the balance detecting section output signal, and the weighing object detecting section output signal, and generate the weighing object detecting section output signal at least the contents of the weighing section output signal at the time when the balance detecting section output signal is generated. A memory circuit is installed that holds and outputs the weight value at that time, so when a fixed display of the amount is commanded, when the weight value reaches a stable state, it automatically holds and outputs the weight value at that time, making it accurate. A fixed amount is displayed.

Therefore, the operability is also significantly improved.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a block diagram of an electronic toll scale, and FIGS. be. 1...Weighing section, 9...Amount display section, 4
...Unit price setting section, 10...Balance detection section, 5...Storage section, 11...Measurement object detection section, 8... Amount calculation section.

Claims (1)

[Scope of utility model registration request] a weighing part that outputs a weighing signal corresponding to the loaded load value; a unit price setting part that outputs a unit price signal corresponding to the price per unit weight of the part to be weighed; In an electronic toll scale having an amount calculation section that outputs a signal corresponding to the amount of money, a balance detection section that inputs the weighing signal, determines the state of the weighed value, and outputs a signal when a stable state is reached; a weighing object detection section that inputs a weighing signal and outputs a signal when the weighing signal changes in the direction of decreasing weight per unit time by more than a predetermined value, determining that the object to be weighed has been removed from the weighing section; The output signal from the weighing section, the output signal from the balance detecting section, and the output signal from the measuring object detecting section are input, and the contents of the measuring section output signal at the time when the balance detecting section output signal is generated are held at least until the measuring object detecting section output signal is generated. An electronic toll scale characterized in that it is provided with a storage section for outputting the data.