JPH06348987A - Radio transmitting/receiving device for meter - Google Patents

Abstract

PURPOSE:To prevent the missetting operation of the same ID code even when a radio transmitting/receiving device is simultaneously provided on plural meters by using a switch limiting means which turns on an ID code setting switch by means of only a single switch operating member. CONSTITUTION:An ID code setting hole part 18 is prepared on the front face of a case 10a as a switch limiting means that has a prescribed size and depth so that only a single setting rod 19 prepared separately can be put in the part 18. A reed switch 17 is placed at the back side of the blind end of the part 18 and against an iron plate 21. Furthermore a magnet is contained in the tip part 20 of the rod 19. When the rod 19 is inserted in the part 18, the attracting force is generated between the magnet and plate 21 and therefore the rod 19 is inserted up to the blind end of the part 18. Then the switch 17 is turned on by the line of magnetic force that passes through the plate 21. In such a way, the switch 17 is turned on when an ID code is set. Thus an ID code setting operation is permitted only for each meter.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio transmitter / receiver which is used by being connected to or built in a meter, such as a gas meter or a water meter, for remote meter reading by radio. Dexterous radio transmitter / receiver.

[0002]

2. Description of the Related Art In such a radio transmitter / receiver for measuring instruments, in order to distinguish it from others, at the time of initial setting after installation,
The ID code of each measuring instrument was set and stored in the microcomputer. Then, when a request is sent from the wireless meter, it is checked whether the ID code sent together with it is the same as its own ID code. When they are matched, the weighing result of the connected weighing device is sent and received. It was transmitting from the circuit.

[0003]

However, when a plurality of radio transmitters / receivers are simultaneously installed in a place where a large number of measuring instruments are arranged in a short distance, such as an apartment house, all of them are ID at the same time. Since the code can be set, there is a problem that the same ID code is set to them when trying to set wirelessly by the wireless meter.

Further, in order to avoid such a problem, when the switch provided in the wireless transmission / reception device is turned on, the transmission / reception circuit is operated for a certain period of time, and only during this period, the ID code is wirelessly set by the wireless meter reading device. A method that makes it possible has been proposed. However, even in this method, if the operation time of the transmission / reception circuit is long, the setting procedure will be incorrect, and if the setting is performed wirelessly after turning on the switches of multiple weighing instruments, the same ID code will be applied to all of them. Is set, and the above problem cannot be solved. On the contrary, if the operation time of the transmission / reception circuit is too short, the setting operation has to be performed quickly, which is inconvenient.

Therefore, it is an object of the present invention to prevent the ID code from being simultaneously set in a plurality of radio transmitter / receivers such as those described above.

[0006]

DISCLOSURE OF THE INVENTION The present invention relates to a wireless transmitter / receiver for a weighing instrument having an ID setting switch, and a switch limitation for enabling the ID setting switch to be turned on by only one switch operating member. Provide means. As this switch limiting means, for example, 1
A hole portion in which only one switch operating member can be inserted may be used.

[0007]

If such a switch limiting means is provided in each radio transmitter / receiver, the switch actuating member for turning on the ID setting switch is such that, even if a plurality of radio transmitter / receivers are simultaneously installed, one radio transmitter / receiver at a time. Only the ID setting switch of the device can be turned on.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 shows the configuration of the wireless transmission / reception device 10 according to the present invention and the connection state to the gas meter 11. The wireless transmission / reception device 10 includes a microcomputer 12, a transmission / reception circuit 13, a battery 14, a power supply control circuit 15, and an antenna 16.
Also, the reed switch 17 for ID setting is provided, and the microcomputer 12 is used by being connected to the telemeter terminal of the gas meter 11.

In the radio transmitter / receiver 10, the power supply control circuit 15 supplies the power supply voltage from the battery 14 to the transmitter / receiver circuit 13 in response to a control signal from the microcomputer 12 to control the operating time of the transmitter / receiver circuit 13. For example, at the time of reception, the power supply voltage is intermittently supplied by the timer in the microcomputer 12 every 20 seconds for 20 milliseconds, and the transmission / reception circuit 13 is operated. As a result, the transmission / reception circuit 13
Demodulates the signal received by the antenna 16 and inputs it to the microcomputer 12, or conversely modulates the signal from the microcomputer 12 and outputs it to the antenna 16.

FIG. 1 is a partial cross-sectional view of the radio transmitter / receiver 10. An ID setting hole 18 is provided on the front surface of the case 10a of the wireless transmission / reception device 10 as a switch limiting means. The hole 18 has a predetermined size and depth such that only one separately prepared setting rod 19 can be inserted. The reed switch 17 has the hole 18
It is installed on the back side of the blind end with the iron plate 21 sandwiched therebetween. Further, a magnet is contained in the tip portion 20 of the setting rod 19,
When the setting rod 19 is inserted into the hole 18, an attractive force acts between the magnet and the iron plate 21 to insert the setting rod 19 to the blind end of the hole 18. Then reed switch 1
7 is turned on by the magnetic field lines passing through the iron plate 21.

The radio transmitter / receiver 10 having the above-mentioned configuration
When setting the ID code to the setting bar 1 as above
9 is inserted into the hole 18 and the reed switch 17 is turned on. Microcomputer 1 that this is turned on
When detected by 2, the microcomputer 12 controls the power supply control circuit 15 to supply the power supply voltage to the transmission / reception circuit 13, and puts the transmission / reception circuit 13 in the reception mode.

Therefore, in a wireless meter detector (not shown), I
When the D code is input, the input ID code is wirelessly transmitted as a telegram. When this is received by the transmission / reception circuit 13 via the antenna 16, the microcomputer 12 stores the received ID code. After this,
The microcomputer 12 switches the transmission / reception circuit 13 to the transmission mode, and returns the stored ID code to the wireless meter. The wireless meter which receives this collates with the transmitted ID code, and if the IDs match, the ID setting completion is displayed, and if they do not match, an error is displayed. In case of a setting error, the setting operation is performed again or the electronic message of the ID code is automatically transmitted again.

After the ID setting is completed, the setting bar 19 is inserted from the hole 18
When is pulled out, the reed switch 17 is turned off. When this is detected by the microcomputer 12, the microcomputer 12 controls the power supply control circuit 15 to supply the power supply voltage to the transmission / reception circuit 13, and puts the transmission / reception circuit 13 in the reception mode again.

I / O is used for the radio transmitter / receiver 10 of another gas meter.
When setting D, the same operation as above is performed. The position of the reed switch 17 may be on the back side of the side surface of the hole 18 as long as it is not affected by the external magnetic field.

Further, instead of the lead switch 17, a push switch 22 may be used as shown in FIG. In this case, the setting rod 19 does not need a magnet, but the setting rod 19 has a hole 18
So that the setting rod 19 can be fixed while the push switch 22 is being pushed, the protrusion 23 is formed in the opening of the hole 18, and the groove 24 that fits with the protrusion 23 is formed on the outer surface of the setting rod 19. To provide. Then, when the setting rod 19 is inserted to the place where these are fitted, the push switch 22 is pushed by the tip of the setting rod 19 to be turned on, and the state is maintained.

When performing the meter reading of the gas meter 11 in which the ID is set in the wireless transmitter-receiver 10 according to the structure of FIG. 1 or 3, the wireless meter is operated to wirelessly transmit the transmission request together with the ID code. Then, the wireless transceiver 10
The ID code and the transmission request are received by the transmission / reception circuit 13 through the antenna 16 and input to the microcomputer 12. The microcomputer 12 receives the received I
Determine if the D code matches your own ID code,
If they match, the measurement result of the gas meter 11 is wirelessly transmitted from the antenna 16 by the transmission / reception circuit 13. Thereby, the measurement result of the gas meter 11 can be displayed on the wireless meter.

When changing the ID code, if the wireless meter is operated and the current ID code and the new ID code are input, an ID setting message is transmitted, and the micro of the wireless transmitter / receiver 10 which has received this message. A new ID code is stored in the computer 12 in place of the previous ID code. At this time, since the ID has already been set,
Since there is no risk of missetting other gas meters, the setting bar 1
You don't have to use 9.

In both the structures shown in FIGS. 1 and 3, the ID is set by turning on the switch of the radio transmitter / receiver 10 and turning it off after the setting. Since it is turned on only when it is inserted into the hole 18, it is necessary to set the IDs one by one, and even if the wireless transmitter / receivers are simultaneously installed in a plurality of meters, the same ID may be wrongly set. There is no.

Next, FIG. 4 shows a structure in which an LED (light emitting diode) 25 is added to the structure of FIG. 1, and the LED 25 is used to perform ID setting display and reception mode display. The LED 25 is, for example, a recess 26 on the front surface of the case 10a.
Install inside.

The operation of the structure shown in FIG. 4 will be described. Setting bar 1 in the initial setting of the ID code
When 9 is inserted into the hole 18 and the reed switch 17 is turned on, the power supply voltage is supplied to the transmission / reception circuit 13 as in the case of FIG. 1, and a current also flows through the LED 25 to light it. The setter looks at this and confirms that the ID can be set, and inputs / sets the ID code by the wireless meter as in the above-described example.

After confirming that the ID code has been set correctly, when the setting rod 19 is pulled out from the hole 18, the reed switch 17 is turned off and the transmitter / receiver circuit 13 is supplied with the power supply voltage at a constant cycle. The reception mode is set. At this time, since the LED 25 also blinks repeatedly in the same cycle, it can be seen at a glance that the transmission / reception circuit 13 is in the reception mode. In addition, if you want to suppress the consumption of the battery 14, LED2
The blinking cycle of 5 may be lengthened or lighted only at the initial setting.

In the above-described embodiment, the wireless transmission / reception device 10 is externally attached to the measuring instrument such as the gas meter 11,
The control is performed by the microcomputer 12 in the wireless transmission / reception device 10. However, in the case of a weighing instrument equipped with a microcomputer, the configuration may be such that it is built in and the above-mentioned control is performed by the microcomputer of the weighing instrument. In this case, the measuring device may be provided with a new ID setting switch, but if a magnet switch or the like is already provided, it may be shared with this.

If the weighing instrument already has the LED 25, it is not always necessary to newly provide the LED 25 by also using the weighing instrument. Further, in the case of the weighing instrument having the LCD display panel, the transceiver circuit receives the signal. Alternatively, the transmission status may be displayed on the panel.

[0024]

According to the present invention, since the ID setting switch of only one wireless transmitter / receiver can be turned on at a time, the wireless transmitter / receiver can be installed in a plurality of weighing instruments at the same time. However, the same ID will not be erroneously set.

According to the second aspect, the effect as described above can be obtained by merely providing the hole in the wireless transmission / reception device.

According to claim 3, it can be seen at a glance that the ID can be set.

According to claim 4, it can be seen at a glance that the transmission / reception circuit is in the reception mode after the ID setting is completed.

[Brief description of drawings]

FIG. 1 is a sectional view of a portion for performing an ID setting operation of a wireless transmission / reception device according to the present invention.

FIG. 2 is a block diagram showing an overall configuration of the wireless transmission / reception device and a connection state thereof to a gas meter.

FIG. 3 is a sectional view of another example of a portion for performing an ID setting operation.

FIG. 4 is a cross-sectional view of an example in which an LED is added to the structure of FIG.

[Explanation of symbols]

 10 wireless transmitter / receiver 11 gas meter 12 microcomputer 13 transmitter / receiver circuit 17 ID setting reed switch 18 hole 19 setting rod 22 ID setting push switch 25 LED

Claims (4)

[Claims] 1. A microcomputer, a switch for ID setting connected to the microcomputer, and a transmission / reception circuit connected to the microcomputer, wherein when the transmission / reception circuit receives a transmission request together with its own ID code, A wireless transmission / reception device for a weighing instrument, which transmits the weighing result of the weighing instrument from the transmission / reception circuit, is provided with a switch limiting means for enabling the switch to be turned on only by one switch actuating member. Radio transmitter and receiver for measuring instruments. 2. The wireless transmitter / receiver for a weighing instrument according to claim 1, wherein the switch limiting means is a hole into which only the one switch operating member can be inserted. 3. The wireless transmitter / receiver for a measuring instrument according to claim 1, further comprising a display unit that lights up or blinks when the switch is turned on. 4. A display means for displaying that the transmitting / receiving circuit is in a receiving state.
The wireless transmitter / receiver for measuring instrument according to.