JPH04995A - Method and device for supervisory transmission - Google Patents

Abstract

PURPOSE:To reduce the quantity of data to be transmitted by computing change quantity between a measured value inputted this time and the measured value inputted and stored last time, and transmitting an arithmetic result to a supervisory center. CONSTITUTION:The measured value inputted from a measurement input part 1 is converted to a digital value at an A/D conversion part 2, and is inputted to a data arithmetic part 4 and a data storage part 3. The data storage part 3 stores the measured value converted to a digital signal at the A/D conversion part 2. Also, the data arithmetic part 4 computes the difference of the measured value inputted from the A/D conversion part 2 this time and that inputted from the data storage part 3 last time, and sends the arithmetic result to a data transmission/reception part 5. The data transmission/reception part 5 transmits the arithmetic result that is the difference between the measured values this time and last time to the monitoring center at a time when polling from the supervisory center arrives and at time interval set by a sending time interval setting part 6 when no polling arrives.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a monitoring transmission device in a remote monitoring system, and particularly relates to a monitoring transmission method and device for transmitting measured values from the monitoring transmission device to a monitoring center. be.

[Conventional technology] In a conventional monitoring transmission device, a measurement input unit performs analog-to-digital (A/D) conversion of measured values measured in measurement items of monitored equipment, and cyclically monitors the measured values at a fixed period. The measured values were transmitted to the monitoring center or by polling from the monitoring center.

[Problem to be solved by the invention]

In the conventional monitoring transmission device described above, all measured values of the monitored equipment are sent to the monitoring center at the time of polling from the monitoring center or at regular intervals, so it is difficult to transmit them to the monitoring center. The disadvantage is that the amount of data to be transmitted is extremely large and the transmission time is long.

An object of the present invention is to provide a monitoring transmission method and apparatus that can eliminate such drawbacks and reduce the amount of data transmitted to a monitoring center.

[Means for Solving the Problems] The present invention provides a monitoring transmission method for transmitting measured values of measured quantities in monitored equipment to a monitoring center, in which the measured values are input and stored, and the measured values inputted this time and the measured values inputted last time are The method is characterized in that the amount of change from the input and stored measurement value is calculated, and the calculation result is transmitted to the monitoring center at the time of polling from the monitoring center or at regular intervals.

The present invention also provides a monitoring transmission device for transmitting measured values of measured quantities of monitored equipment to a distant monitoring center, which comprises: a measurement input section for inputting measured values; and an analog signal for converting the measured values from analog signals to digital signals. - A digital conversion unit, a storage unit that stores the digital signal, a calculation unit that calculates the amount of change between the digital signal and the digital signal of the previous measurement value stored in the storage unit, and a center that monitors the amount of change. a transmission time interval setting unit that sets a time interval for transmitting data to the computer; and a transmission unit that transmits the amount of change from the calculation unit to the monitoring center at the time of polling from the monitoring center or at the time interval. shall be.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a functional block diagram showing a monitoring transmission device according to an embodiment of the present invention.

The monitoring transmission device 7 includes a measurement input section 1, an A/D conversion section 2, a data calculation section 3, a data storage section 4, a data transmission section 5, and a transmission time interval setting section 6.

The measurement input section 1 inputs the measured value of the measured quantity in the monitored equipment and sends it to the A/D conversion section 2 .

The analog/digital (A/D) converter 2 converts the analog signal of the measurement value input from the measurement input section 1 into a digital signal, and sends it to the data calculation section 3 and the data storage section 4.

The data storage section 3 stores the digital signal from the A/D conversion section 2. The data stored in this data storage unit is
This is data for comparison in the data calculation section 4.

The data calculation unit 4 calculates the difference between the measured value (this time) of the digital signal just input from the A/D conversion unit 2 and the measured value of the digital signal stored in the data storage unit 3 a little earlier (previous time). It calculates and sends the result of the calculation to the data transmitter 5.

The data transmitting unit 5 receives the calculation result from the data calculation unit 4,
If there is polling from the monitoring center, the data is transmitted at that point, and if there is no polling, it is transmitted to a distant monitoring center at the time interval set in the transmission time interval setting unit 6.

The transmission time interval setting section 6 sets the time interval of calculation results to be transmitted to the monitoring center by the user.

Next, the operation of this embodiment will be explained. Assuming that the transmission time is set in the transmission time interval setting unit 6 of the monitoring transmission device 7, the measurement value input from the measurement input unit 1 is as follows.
The data is converted into a digital value by the A/D converter 2 and input to the data calculator 4 and data storage 3. The data storage section 3 stores the measurement values converted into digital signals by the A/D conversion section 2. Furthermore, in the data calculation section 4, the A/D conversion section 2
The difference between the current measurement value input from the data storage unit 3 and the previous measurement value input from the data storage unit 3 is calculated, and the calculation result is sent to the data transmission/reception unit 5. Then, in the data transmitting/receiving section 5, if there is polling from the monitoring center, at that point, or if there is no polling, at the time interval set by the sending time interval setting section 6, the monitoring center will be notified of the difference between the previous and current measurement values. Transmit the result of a certain operation.

As explained above, the monitoring transmission device of the present invention includes a measurement input unit that constantly samples a measurement quantity, an A/D conversion unit that converts the measurement value input from the measurement input unit into A/D,
A data storage section stores the previous input measurement value input from the measurement input section, and the difference between the current measurement value input from the A/D conversion section and the previous calculation value input from the data storage section ( It has a data calculation unit that calculates the amount of change), a data transmission/reception unit that transmits data to and from the monitoring center, and a transmission time interval setting unit that determines the transmission time. Send.

It goes without saying that this monitoring and transmitting device has a function that can be combined with a function of transmitting all or part of the measured values in accordance with a command from the monitoring center or automatically.

[Effects of the Invention] As explained above, the present invention reduces the amount of data to be transmitted, because even if a large number of measured values are transmitted to the monitoring center, the difference (amount of change) between the inputted previous measured value and the current measured value is transmitted. This has the effect of reducing transmission time.

[Brief explanation of the drawing]

FIG. 1 is a functional block diagram showing a monitoring transmission device according to an embodiment of the present invention. 1...Measurement input unit 2...A/D conversion unit 3...Data storage unit 4...Data calculation unit 5...Data transmission unit 6... ...Transmission time interval setting section

Claims (2)

[Claims] (1) In a monitoring transmission method that transmits the measured value of a measured quantity in monitored equipment to a monitoring center, the measured value is input and stored, and the change between the currently inputted measured value and the previously inputted and stored measured value is determined. A monitoring transmission method characterized by calculating the amount and transmitting the calculation result to the monitoring center at the time of polling from the monitoring center or at regular intervals. (2) A monitoring transmission device that transmits measured values of measured quantities of monitored equipment to a distant monitoring center, including a measurement input section that inputs the measured values, and an analog/digital unit that converts the measured values from analog signals to digital signals. a conversion unit; a storage unit that stores the digital signal; a calculation unit that calculates the amount of change between the digital signal and the digital signal of the previous measurement value stored in the storage unit; and transmits the amount of change to a monitoring center. a transmission time interval setting unit that sets a time interval for the calculation, and a transmission unit that transmits the amount of change from the calculation unit to the monitoring center at the time of polling from the monitoring center or at the time interval. Monitoring transmission equipment.