JP4450481B2 - Centralized meter reading system for water meter and receiver for assembly - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a centralized meter reading system for a water meter used in an apartment house and the like, and a receiver for the assembly used in this system.
[0002]
[Prior art]
A water meter with a transmitter is installed in each dwelling unit of the apartment, and the water consumption of each dwelling unit measured by these water meters is displayed on the remote collective receiver for each dwelling unit that is arranged in a centralized meter reading panel. Centralized meter reading systems for water meters are known.
[0003]
In the water meter with a transmitter, a transmitter with a transmission switch that is operated for each unit flow rate by a rotating magnet provided in a tooth ring array of the water meter is attached to the upper portion of the meter.
[0004]
The transmitter of each water meter is connected to the corresponding receiver of the centralized meter reading board via a transmission line. When the transmission switch of the transmitter is actuated, the pulse motor of the receiver rotates to step the number wheel for display through the gear. The number wheel of the receiver displays the integrated value of the flow rate measured with the water meter of the corresponding dwelling unit.
[0005]
[Problems to be solved by the invention]
In the conventional centralized meter reading system, the transmission lines of adjacent dwelling units (or rooms) may be mistakenly replaced and erroneously displayed when the collecting receiver is installed. To confirm that there is no connection error or disconnection of the transmission line, temporarily remove the corresponding water meter transmitter of the dwelling unit from the meter, and use the test magnet (permanent magnet) to transmit the transmitter. The test pulse is sent and the specified receiver connected with the transmission line is operated, and the operator confirms that this receiver is correct and that there is no disconnection or short circuit of the transmission line. It was.
[0006]
Therefore, there is a problem that this confirmation work is troublesome and takes time.
[0007]
Accordingly, an object of the present invention is to provide a centralized meter reading system for a water meter that can eliminate such problems, and a collecting receiver used in this system.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the invention of claim 1 is directed to an electronic water meter having a communication function for transmitting a water usage amount and a unique ID number in a telegram format upon receiving a start signal, and the electronic water meter. And a plurality of combinations with electronic collective receivers that send and receive start signals to receive and display meter reading information, and these collective receivers are used as a centralized meter reading board A centralized meter reading system for water meters arranged in a group,
In order to call the ID number of the electronic water meter connected by the transmission line, the electronic water meter is connected to the reed switch that sends an activation signal and the response message sent by the electronic water meter in response to the activation signal. Receiving for gathering having a microcomputer for identifying the ID number and displaying the identified ID number on the display means for a certain period of time, and a liquid crystal display which normally displays the amount of water used and displays the ID number for the certain period of time And equipped with
When installing an electronic meter and a centralized meter reading board, an ID number of the electronic water meter is called from the electronic collective receiver and displayed on the collective receiver.
[0010]
When an activation signal is sent to call the ID number of the electronic water meter, the water meter transmits a response message in response to the activation signal. The identification means of the receiver identifies the ID number of the water meter from this response message. Then, the display means displays the ID number.
[0012]
When the reed switch is activated, an activation signal is sent out. In response to this activation signal, a response telegram is sent from the electronic water meter. The microcomputer of the receiver identifies the ID number in the response message and displays the ID number on the liquid crystal display for a certain period of time. After a certain period of time, the amount of water used is displayed.
[0013]
The invention of claim 2 is a collecting receiver for use in the centralized meter reading system for water meters according to claim 1,
An assembly receiver , wherein the reed switch is mounted on an electronic circuit board on which a liquid crystal display is mounted.
[0014]
When a magnet (permanent magnet) is brought close to the front of the receiver or the liquid crystal display, the reed switch is activated and the ID number of the connected electronic water meter is displayed on the liquid crystal display for a certain period of time.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Next, preferred embodiments of the present invention will be described with reference to examples of the drawings.
[0016]
Ten collective meter reading boards 1 in FIG. 1A have ten electronic collective receivers (hereinafter simply referred to as “receivers”) 2 to 11 arranged, and each dwelling unit 101 of the building 12 in FIG. 102, 201,..., 402, 501 and 502 are connected to the respective electronic water meters 2M to 11M by two-core cables.
[0017]
Since each of the receivers 2 to 11 has the same configuration, the configuration of the receiver 2 will be described with reference to FIG.
[0018]
The receiver 2 sends an activation signal to the corresponding electronic water meter 2M every predetermined time every day, receives meter reading information from the electronic water meter 2M, and displays the amount of water used displayed on the liquid crystal display 2a. The microcomputer 2b for calculation control which updates and displays (integrated flow volume) is provided, and communicates with the electronic water meter 2M via the communication interface 2c and the transmission line 2A.
[0019]
By operating this switch, the reed switch 2d sends an activation signal to the electronic water meter 2M via the communication interface 2c, and identifies the ID number in the response message from the electronic water meter 2M. The liquid crystal display 2a has a function of displaying the ID number for a certain time (for example, 30 seconds).
[0020]
In addition to the last four digits of these ID numbers displayed on the microcomputer 2b, the microcomputer 2b can set itself according to the electronic water meter of the connection partner at the time of connection startup, or the integrated value (water consumption) once a day Software that reads and displays updates.
[0021]
Note that the ID number of the water meter is set in advance by a meter maker by driving it into the memory of the electronic water meter with a personal computer before shipment. For example, if the production number is a 9-digit number “123456789”, the ID number corresponds to the production number of the water meter, and a 14-digit “000003456789” is added by adding 0 for 5 digits before the production number. .
[0022]
The lithium battery 2e supplies power to each circuit such as the microcomputer 2b. The voltage detection circuit 2f detects the voltage of the lithium battery 2e, and the microcomputer 2b displays a battery voltage drop alarm or the like on the liquid crystal display 2a. The communication interface 2c acts between the setting device 13 and the microcomputer 2b connected as necessary.
[0023]
As shown in FIGS. 2 (a), (b), (c) and FIG. 3, the receiver 2 has a liquid crystal display on one substrate 15 of an electronic circuit unit 14 having two printed wiring boards connected in an L shape. 2a is mounted so that the display can be seen from the window of the case 16. Reference numeral 17 denotes the other substrate.
[0024]
On the front surface of the substrate 15, a reed switch 2 d is disposed between the substrate 15 and the liquid crystal display 2 a, and the lead is soldered to the substrate 15. The lithium battery 2 e is attached to the upper surface of the substrate 17.
[0025]
The terminal bolts 18 and 19 attached to the rear surface of the case 16 are connected to the other ends of the two lead wires each connected to the substrate 17 inside the case, respectively, and the core wire of the transmission line 2A is connected to the case 16 Are connected to terminal bolts 18 and 19 outside.
[0026]
As shown in FIG. 2 (a), the liquid crystal display 2a includes a flow rate (water consumption) display unit 20 having a 6-digit display of 10 m ³ or more, a display unit 21 having a 4-digit number smaller than the display unit, It has a 4-digit instantaneous flow rate display unit 22, a battery voltage display unit 23, and the like. The display unit 21 normally displays a number of m ³ or less of the flow rate (water consumption), but from the front of the receiver 2 to the front of the least significant digit of the 6-digit flow rate display unit 20 of the liquid crystal display 2a. Further, when one end of a rod-shaped magnet (permanent magnet) (not shown) is brought close to operate the reed switch 2d, the microcomputer 2b sends an activation signal to the electronic water meter 2M.
[0027]
Then, a response message is sent from the electronic water meter 2M, the microcomputer 2b identifies the meter ID number of this message, and the last four digits of the ID number are displayed on the four-digit display unit 21 for 30 seconds.
[0028]
Assuming that the ID number of the electronic water meter 2M is “00000000000001” with 14 decimal digits, the last 4 digits of “0001” are displayed for a certain period (30 seconds). . When a certain time elapses, the display unit 21 returns to the flow rate display. In addition, in order to use it for the display of ID number, you may make it use the flow volume display part 20 with a large dimension of a number. Making the ID number 14 digits is an established convention.
[0029]
【The invention's effect】
Since the centralized meter reading system of the present invention is configured as described above, when a water meter or meter reading board is installed, the ID number of the water meter is called from the collecting receiver and displayed on the receiver. You can easily check the ID number of the water meter being used, whether the transmission line is connected by mistake, whether the transmission line is broken or short-circuited, etc.
[0031]
In addition , since the collecting receiver uses a liquid crystal display that normally displays the flow rate to display the ID number, there is an advantage that the numerical dimension of the display can be kept large.
[0032]
Furthermore, in the collective receiver according to claim 2 , the ID number reading operation can be easily performed only by bringing the permanent magnet close to the magnet, and the structure therefor is simple and effective in terms of cost. In addition, since the operation permanent magnet is brought close to the liquid crystal display, there is an advantage that the operation is not mistaken.
[Brief description of the drawings]
FIG. 1A is a schematic front view of a centralized meter reading board, FIG. 1B is a diagram showing an example of the arrangement of each dwelling unit of a building and a water meter in an apartment house, and FIG. 1C is a block diagram of a collecting receiver according to the present invention. And the connection state with the transmission line with the water meter is also shown.
2A is a front view (front view), FIG. 2B is a plan view of the case with the top plate of the case cut off, and FIG. 2C is the right side plate of the case. It is a right view in the state which fractured partially.
FIG. 3 is a rear view of the collecting receiver of FIG. 2;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Centralized meter reading board 2-11 Collecting receiver 2a Liquid crystal display 2b Microcomputer 2d Reed switch 2e Lithium battery 2M-11M Electronic water meter 14 Electronic circuit part 15, 17 Printed wiring board 20, 21 Flow rate display of liquid crystal display part 2a Part

Claims (2)

An electronic water meter having a communication function for sending a water usage amount and a unique ID number in a telegram format upon receiving a start signal, and connected to the electronic water meter via a transmission line to send a start signal A centralized meter reading system for water meters comprising a plurality of combinations with electronic collective receivers that receive and display meter reading information of meters, and these collective receivers are collectively arranged on a centralized meter reading board,
In order to call the ID number of the electronic water meter connected by the transmission line, the electronic water meter is connected to the reed switch that sends an activation signal and the response message sent by the electronic water meter in response to the activation signal. Receiving for gathering having a microcomputer for identifying the ID number and displaying the identified ID number on the display means for a certain period of time, and a liquid crystal display which normally displays the amount of water used and displays the ID number for the certain period of time And equipped with
A centralized metering system for a water meter, wherein when an electronic meter and a centralized meter reading board are installed, an ID number of the electronic water meter is called from the electronic collecting receiver and displayed on the collecting receiver. A collective receiver for use in the centralized meter reading system for a water meter according to claim 1,
An assembly receiver, wherein the reed switch is mounted on an electronic circuit board on which a liquid crystal display is mounted.

Images