KR940006218B1 - Direct read type measuring unstrument of wattmeter - Google Patents

Abstract

The apparatus is for metering watt-hour by using a plastic magnet and hall sensor. The apparatus comprises a plastic magnet (20) having 10-digit in outer diameter, a plastic guider (30) for guiding the plastic magnet (20), and a hall sensor (40) depositing to face the plastic magnet at a certain distance so that rotating amount of the plastic magnet is detected by means of 4-bit electrical signal.

Description

Direct metering device of integrated power meter

Figure 1 shows a conventional weighing device, (a) is a perspective view showing the structure of the rotating body, (b) is a front view showing the structure of the fixed body, (c) is a structural diagram of the metering device.

2 is a perspective view of a direct reading meter of the present invention.

3 is a longitudinal cross-sectional view of the rotating body of FIG.

Figure 4 is a schematic diagram showing the magnetizing direction of Figure 3 plastic magnet.

Figure 5 is a schematic diagram showing the arrangement state of the second Hall sensor.

6 is a block diagram of an automatic remote meter reading system.

7 is a detailed block diagram of the FIG. 6 direct read meta. FIG.

* Explanation of symbols for main parts of the drawings

10: rotating body 20: plastic magnet

30: plastic guider 40: Hall sensor

50-80: Substrate

The present invention relates to a meter for automatic remote meter reading, and more particularly, to a direct reading metering device for an integrated electricity meter, which enables the meter to be read directly using a telephone line or the like.

In the conventional remote metering metering apparatus, as shown in FIG. 1, the surface of each counting rotor 1a is divided into a suitable number of black areas 1b and white areas 1c corresponding to the number of side coefficients thereof. A predetermined number of optical sensors 2a are installed in the fixed body 2b which is painted and opposed to the counter rotating body 1a, and the black region 1b and white thereof are rotated as the counter rotating body 1a rotates. The area 1a was detected by the code signal by the optical sensor 2a of the fixed body 2b.

That is, when the optical sensor 2a is opposed to the black region 1b, it is read out as "0", and when the optical sensor 2a is opposed to the white region 1c, it is read as "1" and the four optical sensors 2a are read. As a result, a code signal corresponding to each coefficient number is generated so that each coefficient number can be detected.

However, in the conventional remote metering metering device, since the stationary body 2b is installed to face each rotating body 1a, not only the structure thereof is complicated, but also the installation work becomes difficult, and the cause of raising the manufacturing cost is increased. In addition, when dust or the like gets stuck in the painted part of each rotating body 1a due to prolonged use, the coefficient value according to the rotation of the rotating body 1a cannot be accurately detected by the fixed body 2b. There was a disadvantage that the reliability of.

In view of such a conventional drawback, the present invention provides a plastic magnet on the outer circumferential side of each rotating body so as to cover three numerical display partitions of the decimal number display partition area, and one plastic magnet from each side of the plastic magnet. A plastic magnet is installed to cover one numeric display divided area at intervals of the numeric display divided area, and a predetermined number of hall sensors are installed to face the outer circumferential surface of each rotating body, thereby counting the coefficient value according to the rotation of the rotating body. Invented to be detected as a code signal value in the Hall sensor, it will be described in detail with reference to the accompanying drawings as follows.

FIG. 2 is a perspective view of the present invention direct-reading weighing apparatus, and FIG. 3 is a longitudinal sectional view of the rotating body of FIG. 2 as shown in FIG. (20), but place one large plastic magnet to cover three numeric areas (1.0.9 here), and space the plastic magnets and one numeric area one by one (here 3 and 7) the plastic magnets are arranged to cover the plastic magnets 30 and are fixed to the plastic guider 30, and the center line of the number 2 area is positioned at the position opposite to the outer circumference of the rotating body 10 at the position where the number 0, which is measured, is projected through the name plate opening. Place the substrate 50 on the same direction, and place the substrate 60 on the substrate 50 in a direction coinciding with the center line of the number 3 region, spaced 36 degrees apart from the substrate 50. 108 degrees apart from the number 5 Substrates 70 are arranged in a direction coinciding with the core line, and the substrates 80 are disposed in a direction coinciding with the center line of the number 6 region by 36 ° away from the substrate 70, and then these substrates 50-80. To the meter frame.

4 is a schematic view showing the magnetizing direction of the plastic magnet 20 of FIG. 3, and as shown therein, each of the plastic magnets 20 has an N pole formed at its outer circumferential surface side and an S pole formed at its inner circumferential surface side. .

FIG. 5 is a schematic view showing a state in which the Hall sensors are disposed on the substrates 50-80 of FIG. 3, and as shown in FIG. 5, four Hall sensors 10 are formed on each of the substrates 50-80. On the center line of the whole (10) is installed in one-to-one correspondence with each of the rotating body (10), where the number and arrangement of the plastic magnet 20 and the arrangement method of the substrate 50-80 is 0-9 It is only one embodiment for 4-bit encoding a number without duplication, and various modifications are possible.

The present invention configured as described above can directly read the meter reading without using the meter by using communication means such as a telephone line or a power line. First, the general configuration of the automatic remote meter reading system (AMRS) will be described.

6 is a block diagram of an automatic remote meter reading system, as shown therein, a metering computer A in charge of the metering service, and an exchange matching device B for capturing the subscriber subscriber line with no-ringing. ), And a subscriber coupling device (C) and a direct reading meter (D), which are coupling devices with the home meta.

Looking at the function of each device, the meter reading computer (A) controls the overall function of the meter reading system, the switch matching device (B) captures the subscriber line requested by the meter reading computer (A) to read the meter reading computer (A) and subscriber coupling device (C) to open the communication channel, and the subscriber coupling device (C) is a coupling device with the meta used by connecting to the telephone line of the general subscriber's home to read the meta value at the request of the meter reading computer (A) Has the function of transmitting.

In addition, the direct reading meter (D) is composed of the meter (D) and the meter value detection unit (D) as shown in FIG. 7 to transmit the detected meter value to the code conversion unit (F) of the subscriber coupling device (C). Do it.

On the other hand, the present invention is applied to the Hall effect of the Hall sensor 40 which is operated by the magnetic field of the plastic magnet 20 as described above, if the rotating body 10 is rotated, as shown in Figure 3 if the plastic of the number 3 area When the magnet 20 is close to the Hall sensor 40 of the substrate 60, the magnetic field of the plastic magnet 20 extends to the horn sensor 40 of the substrate 60, so that the Hall effect of the Hall sensor 40 The current is generated by this, so that the internal transistor (not shown) of the Hall sensor located directly above the four Hall sensors 40 on the substrate 60 is turned on.

Therefore, the output of the Hall sensor 40 on the substrate 60 becomes high potential, and the output of the Hall sensor 40 on the remaining substrates 50, 70 and 80 becomes low potential, resulting in an opening (display portion) between the name plates. Weighing 0, which is read through, can be transmitted to a remote location as an electrical signal of 4-bit code 0100.

That is, when the rotating body 10 rotates, the Hall sensor 40 is operated by the magnetic field of the plastic magnet 20 on the outside of each rotating body to output a pulse of 1 or 0. After detection it can be coded and read.

TABLE 1

As described above, the present invention can directly read the meter reading without using the meter by using communication means such as a telephone line and a power line. Not only does the rotating body rotate smoothly, it does not affect the driving part of the existing electricity meter at all, and it is necessary to supply the driving power to the substrate only at the time of meter reading, which prevents unnecessary power consumption and improves the reliability of the product. Since the substrates on which the Hall sensors are mounted are installed to face the outer circumferential surface of the rotating body, not only the structure thereof is simplified but also the manufacturing cost is reduced.

Claims (3)

A plastic magnet magnetized to cover a predetermined area by dividing the decimal number display area into three parts on the outer circumferential side of the rotator for each digit of each digit, and the plastic magnet with a predetermined interval facing the outer circumference of the rotator for each digit. The direct reading meter of the integrated power meter, characterized in that it comprises a Hall sensor installed to detect the decimal weighing value of each rotating body by a 4-bit electrical signal by the magnetic field of the magnetic field. The direct reading meter of the integrated watt hour meter according to claim 1, wherein the plastic magnet is fixedly installed by the plastic guider. 2. The plastic magnet of claim 1, wherein one plastic magnet covers three decimal number display areas and the other two plastic magnets cover one decimal number display area with a distance between the plastic magnet and one decimal number display area, respectively. Direct metering device of integrated power meter, characterized in that.

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