JP4097375B2 - Load measuring instrument - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a load measuring instrument that measures and displays the amount of gas used.
[0002]
[Prior art]
A load measuring instrument that digitally measures the amount of gas used by counting a pulse signal from a gas meter with a transmission device that opens and closes a reed switch and outputs a flow rate pulse signal for every fixed amount of gas is known.
[0003]
FIG. 2 shows a block diagram of such a load measuring device. A pulse signal from a gas meter (not shown) is applied to the input terminal 1, and after the waveform is shaped by the input circuit 2, the total daily usage counter 3 The accumulated count is displayed on the all-day usage display section 4. At night from 22:00 to 7:00, the night time signal is output from the time signal generation circuit 5 and the gate 6 is opened. The pulse signal is transmitted to the night usage counter 7 to count the night usage and display the night usage. Displayed in part 8.
[0004]
9 is a time-counting counter that counts the pulse signal and the count value is reset to zero by a reset pulse from the time signal generation circuit 5 (for example, every hour). The count value is maximized by the comparison circuit 10. When it becomes equal to the value of the usage counter 12, a signal for opening the gate 11 is output from the comparison circuit 10 to the gate 11. Therefore, when the content of the time counter 9 becomes the same as the value of the maximum usage counter 12, a pulse signal is applied to the maximum usage counter 12 via the gate 11, and the value of the maximum usage counter 12 until the next time pulse. Increase. In this way, the maximum usage counter 12 counts and stores the maximum value of usage within a time limit (for example, one hour) and displays it on the maximum usage display 13.
[0005]
This load measuring device is equipped with a power source battery, corrects the time display of the time display unit 14 to the current time, and resets (returns) the counters 3, 7, and 12 for all-day usage, night-time usage, and maximum usage. Operation is started, and meter reading is performed every month. Then, after each usage amount is read at the time of meter reading, a reset operation is performed.
[0006]
This load measuring instrument is described in Japanese Patent Application Laid-Open No. 58-42922. However, the same publication also discloses a load measuring instrument of FIG. 3 in which the reset operation is simplified.
3 includes an input terminal 1 for inputting a pulse signal from a gas meter with a transmitter (not shown), an input circuit 2 for shaping the pulse signal, the input circuit 2, and a time signal generating circuit 5 The microcomputer 15 that receives signals from the switches 18, 19, 20, and 21 and controls the count operation, and the total daily use amount, the night use amount, the maximum use amount for each time limit, and the time calculated by the microcomputer 15 are calculated. Only the display means 16 for switching display and the power source battery 22, and the night use amount and the maximum use amount are automatically switched alternately and displayed, and the operation of the display switch pushbutton switch 21 can be used to set the time or the all day use amount. In addition to selecting and displaying, if the state of displaying time or total daily usage continues for a certain period of time, for example 2 minutes or more, it will automatically display night usage or maximum usage. In addition, when the reset switch 18 is pressed in the time display state, the various usage amounts are reset to zero, and at the same time, an internal program that automatically switches the display to the night usage amount or the maximum usage amount is provided. .
[0007]
Reference numeral 17 denotes a clock generation circuit, and 19 and 20 denote time setting switches.
[0008]
[Problems to be solved by the invention]
In the above conventional technology, the usage status for each hour must be confirmed locally (that is, where the load measuring device is installed), and the storage capacity for handling the load measurement information is small, so the total is calculated. When doing so, it was inconvenient because the data that had been confirmed locally had to be entered into a personal computer.
[0009]
In addition, in order to correct the time of the load measuring instrument clock or change the setting time to determine the amount used at night (daytime), it is necessary for the operator to directly operate the load measuring instrument switch on site, There was a problem that it was difficult to obtain load measurement information correctly.
[0010]
Furthermore, there is a problem that it is difficult to reliably acquire load measurement information because the measurement data of various usages disappear when the battery runs out.
Accordingly, an object of the present invention is to provide a load measuring instrument that can solve these inconveniences and problems and can obtain load measurement information quickly, correctly, and reliably.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, according to the first aspect of the present invention, each pulse signal from a plurality of gas meters with a transmitter is inputted, and the pulse signals inputted from each gas meter are calculated and integrated in consideration of the weight of the pulse. , Based on the total value of multiple gas meters, total memory that stores all day usage, night memory that stores night usage for the set night time, and maximum usage that is the maximum usage per time period Maximum value memory to store the amount,
An external memory for summing up the pulse signals from the plurality of gas meters in consideration of their weights, and storing the gas usage per fixed time for a maximum of 40 days;
A load measuring instrument equipped with a communication function, a clock function, and a power supply battery,
The total daily usage stored in the total memory, the night usage stored in the night memory, the maximum usage stored in the maximum value memory, the gas usage per fixed time stored in the external memory, and the battery It is a load measuring instrument characterized by performing transmission of voltage drop alarm information and time correction of the time for measuring the predetermined time using a communication function.
The invention according to claim 2 is the load measuring instrument according to claim 1, wherein the product of the weight of the pulse and the number of pulses is calculated for each gas meter, and the total daily usage is obtained based on the sum of the plurality of meters. It is stored in the total memory, and is reflected in the road survey value and the night use amount.
A third aspect of the invention is the load measuring instrument according to the first or second aspect, further comprising a display changeover switch for selectively displaying the measurement data of the total daily usage amount, the nighttime usage amount, and the maximum usage amount. Is.
According to a fourth aspect of the present invention, in the load measuring instrument according to the first, second, or third aspect, the microcomputer calculates and integrates the total memory, the nighttime memory, and the maximum value memory while taking into account the weight of the pulse from each gas meter. It is characterized by using the memory.
A fifth aspect of the present invention is the load measuring instrument according to the first, second, third, or fourth aspect, wherein the predetermined time is one hour.
A sixth aspect of the present invention is the load measuring instrument according to any one of the first to fifth aspects, wherein the time limit for defining the maximum usage amount is one hour.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Next, a preferred embodiment of the present invention will be described with reference to FIG.
Respective pulse signals from three gas meters with transmitters (not shown) are input to the input terminals 1A, 1B, and 1C and input to the microcomputer 15A directly or via a waveform shaping input circuit (not shown). The
[0013]
The pulse signal of each channel input from each gas meter is calculated and integrated by the microcomputer 15A in consideration of the weight of the pulse, and the first memory (memory 1) and the second memory (memory 2) for each channel, respectively. , Stored in a third memory (memory 3). In the total memory, the total value of the contents of the memory 1, the memory 2 and the memory 3 is stored and used as the total daily usage.
[0014]
The nighttime memory stores a set nighttime period, for example, a nighttime usage amount from 22:00 to 7:00. In the maximum value memory, the maximum usage amount that is the maximum value of the usage amount for each time period (for example, every hour) is stored.
[0015]
The 24 memory stores the pulse signals from the three gas meters in consideration of their weights, and stores up to 24 values for each set acquisition time (for example, 1 hour). The 40-day memory stores 40 days, once every hour.
[0016]
Note that the pulse weight is taken into account when counting and integrating the pulses from each gas meter. For example, when 100 pulses each having a weight of 0.1 L / P, 1 L / P, and 10 L / P are input, 0.1 × 100 + 1 × 100 + 10 × 100 = 1110 L is stored as the daily usage amount, It is reflected in the road survey value, nighttime (daytime) usage and maximum usage.
[0017]
The measurement data of each usage is stored in the memory as described above, and by operating the display changeover switch 28, it is easy to select the display according to each usage purpose such as the total daily usage, the night usage, and the day usage. Can be.
[0018]
The memory 1, memory 2, memory 3, total memory, night memory, maximum value memory, 24 memories are microcomputer memories, and the 40-day memory uses an external memory 33.
[0019]
The output terminal 30 outputs an output pulse transmitted from a load measuring instrument to a meter reading center or the like not shown.
The microcomputer 15A is connected to a communication terminal 32 via a communication interface 31, and the communication terminal 32 is connected to a meter reading center or the like (not shown) via an appropriate communication line (for example, a telephone line).
[0020]
The microcomputer 15A has a function of notifying the meter reading center or the like from the load measuring device when the 24 memory or the 40 day memory is full, and can be confirmed at the meter reading center or the like. It can also be confirmed by request communication from a meter reading center or the like.
[0021]
It has a battery voltage drop alarm function that detects and alerts that the voltage of the battery 22 has dropped below a certain level. When the voltage drops, a battery voltage drop display is displayed on the liquid crystal display 29 to alert and communicate. The microcomputer 15A has a function of reporting to the meter reading center or the like. By doing so, since the battery can be replaced with a new one before the original function due to the battery voltage drop is lost, the load measurement information can be reliably obtained also from this aspect.
[0022]
The microcomputer 15A has a clock function. This clock function is used to manage the accumulated gas usage, so settings such as load survey values , nighttime (daytime) usage, and maximum usage can be set. The integrated value within the combined time can be easily managed. Since these integrated values can be checked at the meter reading center using a communication function, load measurement information can be obtained quickly.
[0023]
Moreover, since the information in the microcomputer 15A can be set or confirmed by the communication function, and the time (time) of the built-in clock function can be easily corrected, the clock error can be eliminated. Is obtained correctly. And the road survey function and the time setting at night (daytime) can be operated remotely.
[0024]
【The invention's effect】
Since the load measuring instrument of the present invention is configured as described above, the gas usage measured by the load measuring instrument can be measured from the meter reading center using the communication function, or the time correction of the clock or the night usage can be performed. The meter setting center can also be used to change the time to determine the load, and further, the gas usage measurement value stored in the external memory and the battery voltage drop alarm information can be transmitted every hour, so that the load measurement information can be transmitted quickly and correctly. It has come to be surely obtained.
[Brief description of the drawings]
FIG. 1 is a block diagram of an embodiment of the present invention.
FIG. 2 is a block diagram of the prior art.
FIG. 3 is a block diagram of another prior art.
[Explanation of symbols]
1A, 1B, 1C Input terminal for pulse signal from gas meter 15A Microcomputer 22 Battery 29 Liquid crystal display 31 Communication interface 32 Communication terminal 33 External memory

Claims (6)

Each pulse signal from a plurality of gas meters with transmitters is input, the pulse signal input from each gas meter is calculated and integrated considering the weight of the pulse, and the total daily usage is stored based on the total value of the plurality of gas meters A total memory, a nighttime memory that stores the nighttime usage during the set nighttime period, a maximum value memory that stores the maximum usage that is the maximum value of usage per time period, and
An external memory for summing up the pulse signals from the plurality of gas meters in consideration of their weights, and storing the gas usage per fixed time for a maximum of 40 days;
A load measuring instrument equipped with a communication function, a clock function, and a power battery,
The total daily usage stored in the total memory, the night usage stored in the night memory, the maximum usage stored in the maximum value memory, the gas usage per fixed time stored in the external memory, and the battery A load measuring device, wherein transmission of voltage drop alarm information and time correction of the time for measuring the predetermined time are performed using a communication function. Calculate the product of the weight of the pulse and the number of pulses for each gas meter, calculate the total daily usage based on the sum of multiple meters, store it in the total memory, and reflect it in the load survey value and night usage The load measuring instrument according to claim 1. The load measuring instrument according to claim 1 or 2, further comprising a display changeover switch for selectively displaying measurement data of the total daily usage, the night usage, and the maximum usage. 4. The load according to claim 1, 2, or 3, wherein said total memory, night time memory and maximum value memory use a microcomputer memory for calculating and integrating the weight of a pulse from each gas meter. Measuring instrument. The load measuring instrument according to claim 1, 2, 3, or 4, wherein the predetermined time is one hour. The load measuring instrument according to any one of claims 1 to 5, wherein the time limit for defining the maximum usage amount is one hour.

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