JPS5841558B2 - Operation confirmation method for power generation telemeter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a power generating telemeter comprising a transmitting section that generates a pulse signal every time a certain amount of water, gas, electricity, etc. is used, and a measuring section that counts this pulse signal. The present invention relates to an operation confirmation method for inspecting whether the transmitting section reliably operates when equipment is installed.

The present invention can be applied to power-generating telemeters that remotely measure the amount of water used, as well as gas, electricity, or other fluids. explain.

In general, power-generating telemeters store the energy of flowing water little by little in a spring, etc., and when a certain amount of water flows, the energy stored in the spring is instantly released, and the power is used to create a magnet, such as a permanent magnet. The pulse voltage is instantaneously driven to generate a pulse voltage in the induction winding, and this pulse voltage is guided to a receiving section located at a remote location, and the metering mechanism of the receiving section is driven step by step.

This telemeter system has the excellent feature of not using any external power sources such as batteries, so it has recently begun to be adopted by water stations around the country in place of conventional meters with built-in batteries.

In the power generation type telemeter mentioned above, the power generation unit is obtained from the energy obtained from water, but since the power generation unit is usually installed 0.5 to 1.5 meters underground together with the water meter, the transmission unit is reliable. It was virtually impossible to test whether or not it worked.

Also, in order for the transmitter to generate a single pulse signal, normally
1d of water must flow, and in order to actually run 1m of water and conduct an inspection, the commonly used 13inφ
With a water meter of ~20 mmφ, it took several hours and was extremely inefficient.

The present invention has been made to solve the above-mentioned drawbacks in the prior art.In particular, it is possible to detect whether or not the transmitter is operating reliably in a short period of time by flowing a small amount of water. This is an attempt to provide a method for confirming operation.

FIG. 1 is a diagram for explaining an example of a power generation type telemeter to which the present invention is applied. is rotated in accordance with the amount to be measured, for example, the amount of water used, and is transmitted to the 1-drive permanent magnet 3 via the gear train 2, thereby rotating the permanent magnet 3.

The meter section I and the power generation section (2) are isolated by a glass window 4, a water shield tube 5, etc., and the permanent magnet 6 of the power generation section H rotates following the permanent magnet 3 of the meter section I via the water shield tube 5. It is arranged like this.

The rotation of the driven permanent magnet 6 is transmitted to the generator 9 via the reduction gear group 7, instantaneous feed mechanism 8, etc., and for example, the rotation of the permanent magnet 20 of the generator 9 is transmitted every time 1 d of water is used (see Fig. 2).
A pulse voltage is generated in the induction winding 21 (see FIG. 2) which instantaneously operates the motor.

This pulse voltage is transmitted through two transmission lines 10 and 10' to the pulse motor 11 of the receiving section (2), and a pulse current is passed through the armature winding 22 (see Fig. 2) of the pulse motor to drive the rotor 23. Rotate by a predetermined angle.

The rotation of the rotor 23 is controlled by the counter 13 via the gear group 12.
and drives the counter 13 step by step.

In a power-generating telemeter like the one above, the meter section and power generation section are usually located 0.5 to 1.5 meters underground, as mentioned above.
At the time of installation, construction work is handed over in the presence of Waterworks Bureau staff, but at that time, it is necessary to check whether the meter section and power generation section will work reliably, as they are buried underground. It is difficult to check the amount of water required for the counter to advance one step, for example, when pouring 1- water into the meter and checking the meter's operation at that time, it takes several hours for the inspection as described above. The disadvantage was that it required

The present invention was made to solve the drawbacks of the prior art as described above, and one embodiment thereof is shown in FIG.

In FIG. 2, a photocoupler consisting of a light emitting diode 24, a light receiving diode 25, etc., a slit plate 26, an excitation line 27, etc. are especially added according to the present invention. It is attached to any one of the gear shafts of the gear group 7, and a light emitting diode 24 and a light receiving diode 25 are mounted on the slit plate 26.
is installed.

The inspection device 30 also includes a control circuit 31, an AC wire 32, a DC current 33, a detection circuit 34, a counter 35,
Consists of a display section 36, etc., and a control circuit 31 during inspection.
is operated to supply direct current E (see Fig. 3 C) to the light emitting diode 24 through line 27.10', and supply alternating current voltage (see Fig. 3 1) to the light receiving diode 25 through line 10.10'. do.

Therefore, during inspection, water is actually run on the rotating shaft.
When it rotates, the reduction gear group T also rotates accordingly, the light from the light emitting diode 24 is blocked or passed by the slit plate 26, and the light emitting diode 25 repeats conduction and non-conduction (see FIG. 3C).

According to the conduction or non-conduction of this light emitting diode, the transmission line 1
The alternating current flowing to the light receiving diode 25 through 0 and 10' changes, and the voltage between the terminals of the current detection resistor R is as shown in Fig. 3d.
Changes as shown in .

Here, by operating the control circuit 31, the detection circuit 34
(see Fig. 3C) waveform-shapes the AC voltage from the current detection resistor R to obtain a pulse signal corresponding to the conduction or non-conduction of the light receiving diode 25 (see Fig. 3C), and this pulse signal is counted by the counter 35 and displayed on the display unit 36 to confirm whether or not the operation from the rotary shaft 1 to the gear shaft to which the slit plate of the reduction gear group is installed is being performed reliably. can do.

In this case, the frequency of the AC power supply 32 is the same as that of the induction winding 21.
, the impedance of the armature winding 22 is selected to be sufficiently high, so that the current from the AC power supply 32 does not flow to the induction winding 21 and the armature winding 22, and this AC signal causes the normal The weighing operation of the device will not be affected.

In addition, since the operation after the instantaneous feed mechanism is relatively reliable, there is virtually no problem in practice as long as the operation up to the reduction gear group can be confirmed during the on-site inspection.

As is clear from the above description, according to the present invention, the operation of the transmitter can be confirmed at low cost with a relatively simple configuration, and moreover, it is possible to quickly and efficiently influence the regular weighing operation. This has the advantage that it can be confirmed without fail.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an example of a power generation telemeter system to which the present invention is applied, FIG. 2 is a diagram showing an example of an operation confirmation system according to the present invention, and FIG. 3 is a diagram showing the main parts of FIG. 2. It is a figure which shows an electrical shape wave. ■・・・Meter section, ■・・・Power generation section, ■・
...Receiving section, 1 ... Rotating shaft that rotates according to the measured flow rate, T ... Reduction gear group, 8 ...
... Instantaneous feed mechanism, 9... Generator, 10.1
0'...Transmission line, 11...Pulse motor, 20...Permanent magnet of generator 9, 21...
... Induction winding of generator 9, 22 ... Armature winding of pulse motor 11, 23 ... Rotor of pulse motor 11, 24 ... Light emitting diode , 25
...... Light receiving diode, 26... Slit plate, 2T... Light emitting diode excitation line, 30.
...Inspection device, 31 ... Control circuit, 32 ... AC power supply, 33 ... DC power supply, 34 ... Detection circuit, 35. ...Counter, 36...Display section.

Claims (1)

[Claims] 1. A rotating shaft that rotates in accordance with the flow rate to be measured, a group of reduction gears for decelerating the rotation of the rotating shaft, an instantaneous feed mechanism that is operated in response to rotation from the group of reduction gears, and the instantaneous feed mechanism. a generator that generates a pulse signal in response to the operation of the
It has two transmission lines, one end of which is connected to the generator, for transmitting the output pulse signals thereof, and a pulse motor, which is connected to the other end of the transmission line and is driven in steps by the pulse signals from the transmission lines. In the power generation telemeter, a slit plate is attached to one of the gear shafts of the reduction gear group, and a light emitting element and a light receiving element of a photocoupler are arranged with the slit plate in between, and the light emitting element of the photocoupler is arranged. One of the two transmission lines is connected to one end of an excitation line separately provided, a DC power source is connected to the other end of those lines, and a light receiving element is connected to one of the two transmission lines. An AC power source with a frequency sufficiently high for the impedance of the generator and pulse motor and a current detection circuit are connected to the two transmission lines, and changes in the light receiving element are detected by the two transmission lines. An operation confirmation method for a power-generating telemeter, characterized in that detection is performed through a power generating telemeter.