JP3084305B2 - Water meter separate meter reading system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water meter remote meter reading system.

[0002]

2. Description of the Related Art In cold regions, a water meter is buried deep underground as a measure to prevent the water meter from freezing.
Therefore, in order to facilitate the meter reading, a distance measuring meter system is adopted.

[0003] As this kind of remote metering system, FIG.
As shown in FIG. 4, a self-powered type distance measuring system without a battery in a receiver, or as shown in FIG. 4 or FIG. Used.

[0004]

SUMMARY OF THE INVENTION Among the above prior arts,
Since the self-powered type distance measuring system shown in FIG. 3 obtains energy for power generation from a water flow, there is a problem that the measurement accuracy at a minute flow rate is poor. Also, since the generator is rotated by instantaneous release of the energy stored in the balance spring, variations in the load factor easily affect the voltage waveform (see FIG. 2 (a)) generated by the generator. It is difficult to reduce the variation of
There is a problem that it takes time to set the voltage waveform to the specified value.

In the prior art shown in FIGS. 4 and 5, since the receiver has a battery, there is a problem that malfunction occurs easily when the battery voltage drops due to a decrease in temperature in a cold region.
Further, in the case where a liquid crystal display is employed in the display unit of the receiver, there has been a problem that the liquid crystal display is hardly seen at low temperatures.

In recent years, social needs include not only integrated values but also instantaneous flow, excessive flow, reverse flow, road survey,
A high-performance water meter with good durability and micro flow performance is desired to know water leak information. However, in the self-powered type remote measuring system shown in FIG. 3 and the switch type remote measuring needle system shown in FIG. Since there is no power supply without the power supply, the flow signal cannot be electrically processed, so that much information cannot be obtained and social needs cannot be met.

Accordingly, an object of the present invention is to provide a water meter remote metering system that can solve such problems.

[0008]

In order to achieve the above object, a water meter remote metering system according to the present invention is a multifunctional type having a function of informing of leak, excessive flow, backflow, instantaneous flow, and a load survey function. Electronic water meter (1)
A pulse output circuit (11) for outputting a voltage pulse corresponding to a certain amount of water, and a receiver (13) interlocking with the pulse motor (14) driven by the voltage pulse and the pulse motor (14) A number wheel (15)
Communication I / O for transmitting information such as water leakage, excessive flow rate, reverse flow, instantaneous flow rate value and load survey of the water meter (1).
The terminal (16) connected to the O-circuit (10) by a transmission cord (17) is provided in the receiver (13).

[0009]

Each time the electronic water meter (1) measures a certain amount of water, it outputs a voltage pulse from the pulse output circuit (11) and drives the pulse motor (14) of the receiver (13). Therefore, each time the numeral car (15) advances and displays the water usage.

Further, by connecting a handy receiver or a terminal (for example, NCU) of an automatic meter reading system using a telephone line to the terminal (16) of the receiver (13), the transmission code (17) and the communication I Communication with the electronic meter (1) can be performed via the / O circuit (10).

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the embodiment of FIG. 1, 1 is an electronic water meter.
A weighing mechanism 4 having an impeller 2 and a magnet 3 attached to the upper part of the rotating shaft of the impeller; a magnetic sensor 5 for detecting the rotation of the magnet 3; a flow pulse input circuit 6; a microcomputer 7; It comprises a battery 9, a communication I / O circuit, and a multifunctional electronic indicating mechanism 12 including a pulse output circuit 11.

Note that the microcomputer 7 has
It has a function of communicating the excessive flow rate, the reverse flow, the instantaneous flow rate value and the load survey data to the outside of the water meter 1 through the communication I / O circuit 10, and this function is provided by an electronic water supply system shown in FIG. The detailed description is omitted because it is the same as the meter. Various types of information from the communication I / O circuit 10 are transmitted as a message output.

The pulse output circuit 11 uses a mono-multi circuit or the like which outputs a voltage pulse having a pulse width T and a voltage V as shown in FIG. A receiver 13 includes a pulse motor 14, a numeral wheel 15 linked to the pulse motor 14, and a terminal 16 such as a connector.

Reference numeral 17 denotes a four-core transmission cord, of which two cores are connected between the pulse output circuit 11 and the pulse motor 14 to transmit the voltage pulse output. Also, the other two cores
The communication I / O circuit 10 and the terminal 16 are connected to transmit the message output.

The transmission code 17 is not limited to the four cores in the embodiment, but may be three cores.

[0016]

The water meter remote metering system according to the present invention is constructed as described above. The rotation of the impeller of the metering mechanism is detected by a magnetic sensor without applying a mechanical load, and the rotation is calculated by a microcomputer. Since the system uses an electronic water meter, the measurement accuracy in a micro-basin is improved. or,
All information of water, such as instantaneous flow rate, leak detection, excess flow monitoring, backflow detection, and load survey, can be extracted from the microcomputer terminal (16) via a communication I / O circuit and transmission cable from a microcomputer. it can.

In order to retrieve such information, a known handy receiver is connected to the terminal 16 for operation, or a terminal such as an NCU of an automatic meter reading system using a telephone line is connected to the terminal 16, and the automatic meter reading system is connected. This can be done by communicating with the center.

Further, since the numeral wheel is used for the display of the receiver, it is not difficult to see at a low temperature unlike the liquid crystal display. Furthermore, since the drive power supply of the pulse motor for moving the numeral wheel uses the battery on the water meter side, the battery of the water meter buried deep underground to prevent freezing has no risk of abnormally low voltage at low temperature. In addition, the pulse motor of the receiver can be driven with a stable voltage pulse.

Further, since the voltage pulse can be constituted by an electronic circuit such as a mono-multi, it is easy to manufacture, and a constant short wave (see FIG. 2 (b)) is produced by a pulse output circuit. This has the effect of ensuring the operation of the pulse motor.

The above effects can be summarized as follows: (1) The micro flow performance of the water meter is improved by reducing the load on the impeller. (2) Since an electronic water meter equipped with a microcomputer is used, various water information can be collected.

(3) The receiver reliably displays the amount of water used even at a low temperature, thereby improving the reliability of the system. (4) It can handle automatic meter reading using a telephone line, and has a future.

[Brief description of the drawings]

FIG. 1 is a schematic view of an embodiment of the present invention.

2A and 2B show voltage pulse waveforms of the prior art shown in FIG. 3 and FIG. 2B shows the waveform of the embodiment of the present invention shown in FIG.

FIG. 3 is a schematic view of an example of the related art.

FIG. 4 is a schematic view of another example of the prior art.

FIG. 5 is a schematic view of still another example of the related art.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electronic water meter 10 I / O circuit for communication 11 Pulse output circuit 13 Receiver 14 Pulse motor 15 Numeral wheel 16 Terminal 17 Transmission code

Claims (1)

(57) [Claims] 1. A pulse output for outputting a voltage pulse corresponding to a fixed amount of water to a multifunctional electronic water meter (1) having a function of notifying a value of water leakage, an excessive flow rate, a reverse flow, an instantaneous flow rate and a load survey function. A circuit (11) is provided, a receiver (13) is provided with a pulse motor (14) driven by the voltage pulse and a numeral wheel (15) interlocked with the pulse motor (14), and the water meter (1) is provided. A) a terminal (16) connected to a communication I / O circuit (10) for transmitting information such as water leakage, excessive flow rate, reverse flow, instantaneous flow rate value and load survey by a transmission code (17) to a receiver (13);
A water meter interval meter reading needle system, comprising: