JPH0319036Y2 - - Google Patents

Description

[Detailed description of the invention] To read the meter of a flow meter such as a large water meter or gas meter, it was inconvenient to lift the heavy iron lid and enter the pit. This invention proposes a remote flowmeter that can eliminate such inconvenience, and includes a means 17 for electronically integrating and storing the measurement data of the flowmeters 1 and M, and a means 17 for receiving specific command radio waves from the outside. antenna 2, a tank circuit 3 tuned to the frequency of the command radio wave, and a detection circuit 4.
a receiving means 5 which turns on the power supply section 6 when receiving a command radio wave; a power supply section 6 having a battery 6';
A parallel-to-direct converter circuit 8 that converts the measurement data stored in the electronic integration storage means 17 into a serial digital signal, an oscillation circuit 9 that oscillates a carrier wave, a modulation circuit 10 that modulates the carrier wave according to the measurement data, and a modulation circuit. It has an output circuit 11 that amplifies the carrier wave and outputs it to the antenna 2, and a control 7 that controls a series of sequence operations so that the power supply section 6 is automatically turned off after receiving the command radio wave and transmitting the weighing data. a transmitting means 12 that starts data transmission operation upon receiving power supply from the power supply section 6; and an antenna 2.
1, a push button switch 22 for transmitting a command radio wave, an oscillation circuit 25, a power supply section 24, a reception/detection circuit 22' for receiving and demodulating the transmission radio wave from the transmitting means 12, and a numerical display of the demodulated meter reading data. A reading device 20 having a display 23 and a control circuit 26 that controls these sequence operations.
It is characterized by having the following.

Next, a description will be given based on the embodiments shown in the drawings.

In FIG. 1, 1 is a flowmeter, 20 is a reading device, 30 is a pit, 31 is a lid of the pit, and 32 is a hole made in the lid 31. Insert the antenna 21 of the reading device 20 into the pit through the hole 32 as shown in the figure, and press the push button switch 22 to open the antenna 21.
A specific radio wave is transmitted from the flowmeter 1 and received via the antenna 2 of the flowmeter 1, and an electronic circuit of the flowmeter, which will be described later, is activated to transmit the measurement data of the flowmeter from the antenna 2 as a radio wave. This radio wave is received by the reading device 20, and the weighing data is displayed numerically on the display 23. In this manner, the flow meter 1 automatically transmits its metering data in response to the command radio wave from the reading device 20, and its configuration and operation will be explained in detail with reference to FIG.

In FIG. 2, the radio waves received by the antenna 2 are tuned by a simple tank circuit 3, and the detection circuit 4
The power is supplied to the power supply section 6 through the power supply. 2, 3, and 4 constitute a receiving means 5, which, upon receiving a specific command radio wave from the reading device 20, activates a power supply section 6 having a battery 6'.
Turn on. When the power is turned on, the control circuit 7,
Power is supplied to the transmitting means 12 consisting of the parallel-to-direct converter circuit 8, the oscillation circuit 9, the modulation circuit 10, and the output circuit 11, and the data transmission operation is started. That is, the flow pulse from the magnetic sensor 16 that converts the rotation of the permanent magnet 15 provided on the rotating shaft of the gear mechanism 14 interlocked with the impeller 13 of the mechanical metering part of the electronic flowmeter into an electrical flow pulse. The weighing data stored in the electronic counter 17 that stores electronic integration is converted into a serial digital signal by the parallel-to-direct converter circuit 8, and the carrier wave from the oscillation circuit 9 is converted into a serial digital signal by the modulating circuit 10 depending on the weighing data. The signal is modulated by a method and transmitted as a radio wave via an output circuit 11 and an antenna 2.
The reading device 20 receives this transmitted radio wave and sends it to the detection circuit 2.
2', and the meter reading data is displayed numerically on the display 23. 24 is a power supply unit, 25 is an oscillation circuit, and 26 is a control circuit that controls the sequence operation of the reading device 20. The control circuit 7 of the remote flow meter 1 controls a series of sequence operations from receiving the command radio wave to automatically turning off the power supply section 6 after transmitting the measurement data.

In the embodiment shown in FIG. 3, this invention is applied to a known flowmeter with an oscillator, in which a permanent magnet is provided on the rotating shaft of a mechanical flowmeter M, and a pulse oscillator 18 such as a reed switch is provided adjacent to this magnet. In the embodiment, an electronic integration storage means for cumulatively counting the flow rate pulses of the pulse oscillator 18, a reception means, a transmission means, and a battery are housed in a separate case 19, and the pulse oscillator 18 and the electronic integration storage means are connected to each other by an electric wire. 18'. This embodiment can also be easily converted into a conventional remote meter by removing the part housed in the case 19 and replacing the connection with a receiver of a known remote meter.

The embodiment of FIG. 4 is the electric wire 1 of the embodiment of FIG.
The length of the pulse oscillator 8' is shortened, and the pulse oscillator, electronic integration storage means, receiving means, transmitting means, battery, etc. are housed in the case 19', and the pulse oscillator is mounted on the upper part of the flowmeter main body M. It is magnetically coupled to a rotating magnet.

In addition, when using radio waves in this invention, weak radio waves are used that satisfy the Radio Law.

As is clear from the above explanation, according to this invention, by inserting the antenna 21 of the reading device into the hole made in the lid of the pit and performing the meter reading operation, it is possible to read the weighing data wirelessly in numerical display. This eliminates the need to raise and lower heavy lids, making meter reading easier. Moreover, it can be expected to have a practical effect when there is no place to install a remote meter receiver. Also, after pressing the push button switch, a command radio wave is emitted, the receiving means that receives it turns on the power supply section, transmits the weighing data from the transmitting means 12, and the power supply section 6 automatically turns on.
Since the sequence operation that turns OFF is achieved,
The transmission period from the transmitting means 12 is terminated in a short time. Therefore, consumption of the battery 6' can be minimized.

[Brief explanation of the drawing]

Figure 1 is a diagram showing an example of installing a flowmeter of this invention.
FIG. 2 is a block diagram of the flow meter and reading device of this invention, and FIGS. 3 and 4 are diagrams showing still other different embodiments. 1...Flowmeter, 2...Antenna, 3...Tank circuit, 4...Detection circuit, 5...Receiving means, 6...
Power supply section, 6'...Battery, 7...Control circuit,
8... Parallel/serial conversion circuit, 9... Oscillation circuit, 10
... Modulation circuit, 11 ... Output circuit, 12 ... Transmission means, 15 ... Permanent magnet, 16 ... Magnetic sensor,
17...Electronic counter (electronic totalization storage means),
18... Pulse oscillator, 18'... Electric wire, 19,
19'...Case, 20...Reading device, 21...
Antenna, 22...Push button switch, 22'...
...reception/detection circuit, 23...display unit, 24...power supply section, 25...oscillator circuit, 26...control circuit, M...flow meter.

Claims (1)

[Claims for Utility Model Registration] 1. Means 17 for electronically integrating and storing measurement data of the flowmeters 1 and M, an antenna 2 for receiving specific command radio waves from the outside, and tuning to the frequency of the command radio waves. a receiving means 5 which has a tank circuit 3 and a detection circuit 4 and turns on a power supply part 6 when receiving a command radio wave; and a power supply part 6 which has a battery 6'.
, a parallel-to-direct converter circuit 8 that converts the measurement data stored in the electronic integration storage means 17 into a serial digital signal, an oscillation circuit 9 that oscillates a carrier wave, and a modulation circuit 10 that modulates the carrier wave according to the measurement data. an output circuit 11 that amplifies the modulated carrier wave and outputs it to the antenna 2; a control 7 that controls a series of sequence operations to automatically turn off the power supply section 6 after receiving the command radio wave and transmitting the weighing data; a transmitting means 12 which starts a data transmission operation upon receiving power supply from the power supply unit 6; an antenna 21; a push button switch 22 for transmitting command radio waves; and an oscillation circuit 2.
5, a power supply section 24, and a receiving/detecting circuit 22' that receives and demodulates the transmitted radio waves from the transmitting means 12.
Display unit 2 that numerically displays the demodulated meter reading data
3 and a reading device 20 having a control circuit 26 for controlling these sequence operations. 2. The remote flowmeter according to claim 1, wherein the means for electronically storing measurement data is an electronic counter 17 of a so-called electronic flowmeter operated by a battery. 3 The receiving means, the transmitting means, the battery, and the electronic integration storage means are housed in a case 19 separate from the flowmeter M main body, and the flowmeter M main body has a pulse generator arranged close to a permanent magnet that rotates in conjunction with the metering mechanism. The remote flow meter according to claim 1, which has a transmitter 18, and wherein the pulse transmitter 18 and the electronic integration storage means are connected by an electric wire 18'. 4 A receiving means, a transmitting means, a battery, a pulse transmitter that generates flow rate pulses by the rotation of a magnet, and means for electronically integrating and storing the flow rate pulses are attached to the upper part of the flowmeter M, and are connected to the metering mechanism of the flowmeter M. The remote flow meter according to claim 1, wherein a permanent magnet that rotates in conjunction with the pulse transmitter is magnetically coupled.