JPH0349396A - Monitor transmission equipment - Google Patents

Abstract

PURPOSE:To transmit an abnormal value to a higher-order monitor center without missing by sampling the measurement input with short interval to discriminate a maximum value and a minimum value even at the time when the transmission period to the monitor center is long. CONSTITUTION:A data processing part 12 discriminates a maximum value and a minimum value in accordance with the digital value from an A/D converting part 11. The data processing part 12 outputs the conversion command cycle to the A/D converting part 11 at intervals sufficiently shorter than data transmission time intervals set to a transmission time interval setting part 14. A measurement processing part 13 discriminates whether the measured value from the A/D converting part 11 exceeds a prescribed value or not; and if it exceeds this value, the processing part 13 outputs a transmission command signal of the maximum value and the minimum value to a data transmission part 15. The data transmission part 15 receives the transmission command from the measurement processing part 13 to read data of the maximum value and the minimum value from the data processing part 12 and transmits data to the monitor center.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a monitoring transmission device, and particularly to a monitoring transmission device that transmits measurement data to a monitoring center.

[Conventional technology]

Conventionally, this type of monitoring transmission device converts the state of measurement items of monitored equipment in a measurement input section, and transmits measurement data cyclically at a predetermined period, or by polling from a monitoring center. It looks like this.

[Problem to be solved by the invention]

The conventional monitoring transmission device described above either converts the state of the measurement item of the monitored equipment at predetermined time intervals and sends it to the monitoring center as measurement data, or converts the state of the measurement item when polled by the monitoring center. Since the measurement data is sent to the monitoring center, even if the status of the measurement item abnormally changes outside of the sampling time, the monitoring center side
Since it is not transmitted, there is a drawback that the monitoring center cannot detect the occurrence of abnormal measured values.

[Means to solve the problem]

The monitoring transmission device of the present invention includes a measurement input section that constantly samples measured quantities, a data processing section that performs processing for determining maximum and minimum values from measurement data, and a maximum value from the data processing section when transmitting to a monitoring center. and a measurement control section that sends the minimum value data together with the current value and initializes the maximum and minimum values of the data processing section.

〔Example〕

Next, the present invention will be explained with reference to the drawings. FIG. 1 is a block diagram of one embodiment of the present invention.

The monitoring transmission device 10 includes an analog-to-digital (A/D) converter 11, a data processor 12, a measurement controller 13, a transmission time interval setting unit 14, and a data transmitter 15.

The A/D converter 11 converts the measurement input into a digital value according to a conversion command from the data processor 12 and outputs the converted value to the data processor 12 and the measurement processor 13 . The data processing unit 12 performs processing to determine the maximum value and minimum value based on the digital value from the A/D conversion unit 11 that outputs the conversion command, and when the input value is the maximum value (or minimum value), updates the data and performs the next processing. A conversion command is output to the A/D converter 11 and the process is repeated.

The conversion command cycles that the data processing section 12 outputs to the A/D conversion section 11 are performed at sufficiently shorter intervals than the data transmission time interval set in the transmission time interval setting section 14.

The measurement processing unit 13 determines whether the measured value from the A/D conversion unit 11 exceeds a specified value, and if it exceeds the specified value, outputs a transmission command signal of the maximum value and minimum value to the data transmission unit 15. Thereafter, an initialization command for the maximum value and minimum value is output to the data processing unit 12.

Note that if the measured value continues to exceed the specified value, a data sending command is output to the time interval data transmitting section 15 set by the sending time interval setting section 14. Upon receiving the sending command from the measurement processing section 13, the data transmission section 15 reads the maximum value and minimum value data from the data processing section 12 and sends the data to the monitoring center. Sending time interval setting section 1
4 is set to a value that defines the data transmission time interval.

〔Effect of the invention〕

As explained above, even if the transmission cycle to the monitoring center is slow, the present invention samples measurement input at short intervals and processes the maximum and minimum values, thereby ensuring that abnormal values are not overlooked. This has the advantage that it can be transmitted to a higher-level monitoring center.

[Brief explanation of drawings]

FIG. 1 is a block diagram of one embodiment of the present invention. DESCRIPTION OF SYMBOLS 10... Monitoring transmission device, 11... Analog-digital conversion section, 12... Data processing section, 13... Measurement control section, 14... Sending time interval setting section, 15... Data transmission Department.

Claims (1)

[Claims] In a monitoring transmission device that transmits measured values of monitored equipment to a distant monitoring center, means for converting measured data at predetermined intervals and determining maximum and minimum values;
means for transmitting the measurement data at a predetermined period or at the time of polling from the monitoring center; and means for transmitting the measurement data at a predetermined period or at the time of polling from the monitoring center; 1. A monitoring transmission device comprising means for sending measured data to a monitoring center.