KR100422864B1 - Radio remote monitoring and meter reading system - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless remote monitoring and metering system, and in particular, a signal processor that receives and processes a signal from a detector of analog and digital meters that a person directly measures with eyes. Attach the sensor to contact, or puncture the counter block or the rotating plate or attach the reflector to detect the signal through the optical sensor to format the output signal through the detector and output the resulting pulse data to the microprocessor inside the signal processor. The processor interprets the data and digitizes it, and transmits the data such as each device's unique number and meter reading to the portable terminal through the short-range wireless modem, and transmits it upon request. Automatically at meter reading It is a two-way wireless communication method that reads the needle value, stores the data, and transmits it to the user's computer through the cradle. It is a protocol that communicates with multiple remote meters having unique device numbers. will be.

Description

Wireless remote monitoring and metering system {RADIO REMOTE MONITORING AND METER READING SYSTEM}

The present invention relates to a wireless remote monitoring and metering system, and more particularly, in the environmental monitoring such as water pollution and metering of electricity, water, gas, etc., a meter reader does not directly visit each customer, and is a portable terminal equipped with a short-range wireless modem. Meters with signal processors and short range wireless modems are already attached to existing analog and digital meters already installed in the consumer to enable wireless remote meter reading near the customer in the area by a certain protocol from a vehicle carrying a laptop or a laptop computer. It relates to an invention that can be done.

In the conventional general metering method, the meter reader directly visits the customer, records the metering data used in the current month by hand, prepares the metering unit, calculates monthly usage amount through repeated input of computerized data, and charges a fee.

In this way, when the meter reader reads and writes the instructions of the meter while walking around, there is a problem of an increase in cost due to a problem of a misreading meter and a lot of manpower and time.

On the other hand, in recent years, after visiting the customer by using the handy terminal, input the meter reading value at the site, and when the meter reading is completed, the handy terminal is placed on the cradle to charge and the meter data is transmitted to the user's computer to input the computer data. However, the input process was shortened by inputting at the same time with the meter reading at the same time, but the manpower and time required by the meter reading did not contribute to the reduction of labor cost and there was a problem of false meter reading.

The present invention has been made to solve the above-mentioned conventional problems, a protocol for communicating with a plurality of remote meters having a unique number of each device in a two-way wireless communication method can be read remotely without visiting the customer directly Rapid data processing and accurate measurements can dramatically reduce the demand for huge metering personnel, prevent false readings, prevent crimes against other purposes that pretend to be meter readers, and prevent remote financial losses from malfunctioning. And to provide a meter reading system.

The object of the present invention is to attach a semi-permanent piezoelectric sensor to the gear wheel of the probe's rotating shaft, or a signal processor that receives and processes a signal from a detector of an analog or digital meter that a human directly measures. In order to detect the signal through the optical sensor by puncturing the counter block or the rotating plate or attaching the reflecting plate, the output signal is detected by the detector, and the output pulse data is interpreted by the microprocessor in the signal processor with the application program. It transmits data such as device identification number and meter reading value to the mobile terminal exactly when requesting portable terminal through short distance wireless modem, and automatically reads meter when remote meter is metered by embedding short range wireless modem in portable terminal device or relay device. Read the value and save the data Without visiting suyongga a protocol for communicating with a plurality of remote meters, each with a device-specific code to the two-way wireless communication system for transmission via the cradle to the user's computer can be directly achieved by ever reading it is possible remotely.

Therefore, it is possible to read the meter remotely without visiting the customer directly, which can drastically reduce the demand of the huge metering manpower, prevent the misreading of the meter, and prevent the crime of other purposes impersonating the meter. It can prevent the huge financial loss caused by malfunction.

1 is an overall configuration showing a form of performing a wireless meter from each customer using the present invention system.

2 is a complete system block diagram of a wireless remote system.

3 is a block diagram illustrating a signal processor of FIG. 2.

4 is a block diagram of a short range wireless modem in FIG.

5 is a configuration diagram of the detector in FIG. 3.

6 is a frame diagram of a radio protocol implemented in the present invention.

7 is a rotation memory map structure diagram of a memory of the present invention.

Explanation of symbols on the main parts of the drawings

20: remote meter 30: portable terminal

21 Meter 22 Signal Processor

23, 31: short-range wireless modem 32: portable terminal device

241: carrier monitoring unit 2261: 81: gear wheel

2262: piezoelectric sensor 2263: detection device

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a diagram showing the overall configuration of wireless metering from each customer using the present invention system. The portable terminal 30 is stored in a meter when a meter reading request is made to the meter 20 of each customer. The present instructions are sequentially sent to the portable terminal, thereby reading the instructions of each customer remotely.

In addition, the metering vehicle travels around the customer in the metering area, transmits its own unique number, remembers the instructions to be returned, and performs these processes sequentially. Repeat the procedure and if it is the same, mark it as failed to check the visit.

In this case, an error check code is put at the end of a unique protocol and data to transmit / receive all data to prevent an error of data.

2 is a block diagram of the entire system of the wireless remote system. Each customer's remote meter 20 includes a meter 21, a signal processor 22, and a near field wireless modem 23. The portable terminal 30 ) Includes a near field modem (31) and a portable terminal (32), and the center system (40) includes a host computer (41), a user computer (42), a cradle (43), and a database (44). do.

Therefore, the signal processor 22 detects the signal pulse of the meter 21 when the portable terminal 30 requests a meter reading request to each customer remote meter 20, and stores the signal pulse in the memory of the received signal processor 22. In the near field wireless module 23, the data output from the signal processor 22 may be transmitted wirelessly by configuring a unique protocol and frame.

The portable terminal 30 receives the data transmitted from the remote meter 20 through the short range wireless modem 31 and sends the data to the portable terminal 32 to collect the guide value of each customer.

The collected data is sent from the portable terminal 30 to the center system 40 and placed on the cradle 43 therein to be downloaded and charged, and the collected data is sent to the user computer 42 and sent again. The base 44 aggregates all the data.

FIG. 3 is a block diagram of the signal processor of FIG. 2, and includes a microprocessor 221 for central processing and calculation, an oscillator 222 for clock signal oscillation, and a power supply 224 for power supply. , The counter part of the meter using the piezoelectric sensor (2261) is used to detect the pulse with the usage check detection unit 226 to process the data in the same way as the amount of usage interpreted by the meter, and when the guideline value is changed, the last meter reading according to the power failure or other failure of the meter The current instructions are recorded in the EEPROM memory unit 227 so as to be stored.

The instructions stored in the internal memory 227 and the operating program are sent to the LCD display unit 225 if necessary, and the contents are displayed on the LCD display unit 225 so that the user of the device can be identified and the user can also recognize it. .

In addition, if necessary, the current guide content is transmitted to the short range wireless modem 23 through the communication terminal of the UART 223.

On the other hand, Figure 4 is a block diagram of the short-range wireless modem (23, 32) in Figure 2, since the configuration is the same, for convenience, the code is indicated in accordance with the short-range wireless module 23 in the remote meter (20).

First, a microprocessor 240 for storing a unique protocol and an operating program and receiving data, and receiving data, matches an induced radio wave through an antenna 231 with an LC filter for preventing spurious radiation. The received weak high frequency signal is a low noise high frequency amplification through the LNA 232, and then transitions to 455 KHz through the mixer 233.

At this time, only the intermediate frequency of the mixer passes through the intermediate frequency 234 and is applied to the demodulator 235, where the demodulated digital waveform is decoded and analyzed by the microprocessor, and the signal and noise through the carrier monitoring unit 241 It is determined whether or not.

The VCO 237 is controlled by DC voltage passing through the LPF 238, which is a goof filter, after being encoded by the microprocessor 240 by encoding the meter data received through the UART 223 communication. A desired frequency is generated and a signal amplified by the PAMP 236 power amplifier is transmitted through the antenna 231.

FIG. 5 shows a configuration diagram of the detector in FIG. 3, in which a gear 2226 is installed on a counter block or a rotating shaft of the meter 21 so that the teeth are compressed whenever pressure is applied to the piezoelectric sensor 2262 due to their rotation. When a pulse is generated from the sensor 2262, the pulse is inputted by the detection device 2263 and then shaped and output to the microprocessor 221. Thus, the microprocessor 221 counts data processing and instructions. Usage can be detected.

In addition, Figure 6 shows a frame configuration diagram of a wireless protocol implemented in the present invention, the wireless transmission frame configuration of the short-range wireless modem 23 is a sync code for the synchronization of the preamble and data frame for the stabilization of the short-range wireless modem In total, 36 bits are composed, and the data frame is composed of 127 bits including each manufacturer's identification code and instrument serial number, including command code, data, and error check code.

At this time, the identification number including the manufacturer's identification code and the instrument serial number is checked and ignored if it is not called. If the call is correct, a wireless protocol frame is constructed and data is transmitted and received through a short range wireless modem.

Figure 7 shows the structure of the rotation memory map of the memory of the present invention, the gear and the piezoelectric sensor and the detection device is installed on the rotary shaft of the analog and digital meter as described above, or after the hole or the reflection plate attached to the rotating plate of the optical The sensor detects the signal, reads the pulse generated by the sensor, interprets the detected data with the microprocessor 221 in which the data processing application is embedded, digitizes it, and stores and transmits the used amount in a rotary memory to The urbanization of what can be confirmed.

As described above, according to the present invention, it is very economical because it can be easily installed and used in a known analog and digital meter, and is manufactured by a unique protocol and a unique number of the manufacturer identification code of the meter and the serial number of the meter. For example, it is possible to use the frequency and the accurate wireless communication by adding the error check code for accurate communication through the empty channel by searching the channel of 21 channels). It is a very useful invention that can solve social problems.

Claims (5)

A remote meter 20 for each consumer having a meter 21, a signal processor 22, and a short range wireless modem 23; A portable terminal 30 having a short range wireless modem 31 and a portable terminal device 32; It consists of a host computer 41 and a center system 40 having a user computer 42, a cradle 43 and a database 44, the signal processor 22 being a microprocessor for central processing and computation. 221, an oscillator 222 for clock signal oscillation, a power supply 224 for power supply, a detector 226 for checking the amount of usage using a counter of the meter, and a pulse of the detector 226 Wireless remote monitoring and metering consisting of EEPROM memory unit 227 that stores the current instructions so that the data can be processed in the same way as the amount of usage interpreted and the last meter reading following power failure or other meter failure. In configuring the system, The detection unit 226 is provided with a cog wheel 2221 on a counter block or a rotating shaft of the meter 21, and a piezoelectric sensor is installed near the cog wheel 2221, so that the teeth are piezoelectric sensors 2226 due to the rotation of the meter. Pulse is generated from the compression sensor 2226 whenever pressure is applied to the microprocessor, and the pulse output from the piezoelectric sensor is input between the piezoelectric sensor 2226 and the microprocessor 221 to be shaped to the microprocessor 221. Wireless remote monitoring and metering system, characterized in that the detection device (2263) for outputting the data processing application is embedded in the microprocessor (221) to interpret it and digitize it. The method according to claim 1, The detection unit 226 is a microprocessor with a built-in data processing application by reading a pulse generated by reading a signal generated by the hole through a hole or a reflecting plate attached to the analog and digital meter of the meter through a light sensor The wireless remote monitoring and metering system, characterized in that by using the digitized and digitized and stored in the rotary memory to store and store the previous usage. The method according to claim 1, The communication method between the short range wireless modem 23 in the remote meter 20 and the short range wireless modem 31 in the portable terminal 30 for wireless remote meter reading has a unique number including a manufacturer identification code and a serial number of the instrument. It is a protocol that communicates bidirectionally with a large number of meter readers, and finds channels using 21 channels and communicates with empty channels to prevent duplication or interference with neighboring areas. The method according to claim 1, The short range wireless modem 23 in the remote meter 20 and the short range wireless modem 31 in the portable terminal 30 analyze the received data rate to discriminate the noise and the signal to determine whether the channel is used. And a carrier monitoring unit (241) for searching for an empty channel. The method according to claim 1, The wireless transmission frame of the short range wireless modem 23 in the remote meter 20 and the short range wireless modem 31 in the portable terminal 30 for wireless remote meter reading is used to synchronize the preamble and data frame for stabilization of the short range wireless modem. In addition, the sync code is composed of 36 bits, and the data frame is composed of 127 bits including each manufacturer's identification code and the serial number of the instrument and the command code, data, and error check code. Meter reading system.