KR20020001301A - Telemetering - Google Patents

Abstract

PURPOSE: Provided is a system for remote inspection of meter, by which inspection information from meters in homes, shops, factories, etc. can be economically transmitted and received through telephone lines without additional construction of infra. CONSTITUTION: The system for remote inspection of meter has a transmission part and a reception part. The transmission part includes a processor which senses pulses released from a meter of analog type, processes the pulses and stores the data. The reception part receives the data processed and stored in the transmission part and transmits the data to an exchanging system by automatically dialing at a predetermined point of time (1 to 99 hours). The reception part is installed at a distance of 25 to 30 meter from the transmission part.

Description

Remote meter reading system {Telemetering}

The remote metering system detects the pulse from the analog meter every time the meter returns and stores it and delivers it wirelessly to the receiver in the home once a day.This signal is received once a month using a regular telephone line. It consists of a receiver that delivers to the regional center, and a switch and software that receives and processes the data over the telephone line. The conventional method is a method in which the personnel visited by hand.

Meter reading using a telephone line is a very economical means. It sends and receives meter reading information through the telephone line already installed, and there is no need to build a separate infrastructure. Since most meter readings are outdoors, they are delivered to the wireless transmitter to where the phone is located and connected to the meter reading computer via telephone line once a month.

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1) Transmitter

The PIC16LC63B is used as a 1.1 processor that detects pulse signals and has pulse calculation, accumulation and memory functions.

1.2 Calendar Function

When the calendar function is adopted at the transmitter, cost increases (commodity company) and current consumption are high. Therefore, after using the CLOCK for a certain period of time (1 to 99 minutes, user input), the CPU is inserted into the receiver at the given time. Serial number, meter reading). When commercializing, the clock should be adjusted for the user to select from 1 to 30 days.

1.3 Change of information of transmitter

The information of the transmitter can be changed through RS232C communication with the test handler, and the unique number and pulse amount of the meta device can be changed.

1.4 Frequency

In PROTO-TYPE, 433.92MHz frequency was used, but in the field test, the frequency of 424MHz or 219MHz, which is acceptable in Korea, will be used, and H / D change is necessary according to the frequency change, but there is no problem in function. do.

1.5 Power Supply

In the PROTO-TYPE, AA type batteries (2 pcs) are used, but the lithium battery can be used for commercialization to extend the battery life (more than 5 years), and in case of LOW battery, the main computer can be alarmed.

1.6 Transmission distance and output

It has been developed to reach at least 80 meters in places where there are no power disturbances, and the reach can be reduced if there are obstacles such as walls or doors or radio interference from other devices. Typically, the performance of about 30 meters in the environment of use, but somewhat variable depending on the shape of the house and the position of the receiver. The output is 10mW of aerial power.

1.7 Communication between transmitter and receiver

To check the communication between the transmitter and the receiver, press the TEST button of the transmitter and the alarm lamp of the receiver turns on and then the ALARM lamp turns ON / OFF. If the ALARM lamp does not turn on after the ERROR lamp turns on or the ERROR lamp does not turn on at all, the communication between the transmitters and receivers is bad.

1.8 Other

TEST and ALARM buttons were attached externally for testing. The TEST button is a song. The communication between the receivers is checked. When the button is on, the ALARM button sends the meter information stored in the transmitter to the main computer through the receiver and the exchange system.

2. Receiver

The receiver was developed based on the home care 4200, which is a production model of Apex Co., Ltd., and the receiver was automatically received at the designated time (1 hour to 99 hours, user setting) by receiving the meta number's unique number and pulse information from the transmitter. This equipment transmits meter reading information to the exchange system by calling

This saves labor costs, as well as reading the exact usage on the correct date, eliminating the cost of usage and enabling computerized management from start to finish. When this system is commercialized, the infrastructure for remote meter reading is secured. Therefore, if the customer attaches a wireless module to the meter, it is possible to remote meter all devices with one system.

Claims (1)

An exchanger that digitizes and stores the number returned by an analog meter or meter in a meter, and then wirelessly transmits a range of 25 to 30 meters to a receiver in a home or factory, and transmits this signal to a center using a regular telephone line to process data. And software.