JPH0441440Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a telemeter device in which it is necessary to average instantaneous values of measurement data (for example, a telemeter system for monitoring river water quality) in a telemeter system.

Conventionally, when transmitting data at a master station, that is, a measurement monitoring station, a telemeter device installed at a slave station, that is, a measurement station, converts the instantaneous analog value into a digital code via an analog to digital converter. It only had the function of converting and transmitting the data.

Therefore, when measuring river water quality data, etc., instantaneous value data has a lot of variation and is not practical, so the data collection cycle is extremely short.
The measurement and monitoring station calculated the average value from the collected data. In this case, the transmission line used for the telemeter is generally a single wireless line or a dedicated line from Nippon Telegraph and Telephone Public Corporation, but the cycle is limited by the number of measurement stations and the amount of data.
This has the disadvantage that the error in the average value itself becomes large, and the disadvantage is that when the aforementioned dedicated line is used, the operating cost is large. Another drawback was that the measurement period was short and it was not possible to make telephone calls to the measurement station using free time on the line.

The purpose of this invention is to eliminate these drawbacks, and the primary purpose of this invention is to improve the accuracy of data by creating average value data with the telemeter device of the measuring station, and as a result, the transmission line Due to the increase in idle time, telephone communication between the measurement station and the measurement monitoring station becomes possible, and data collection is performed only when necessary. It is also possible to reduce costs.

The figure is a block diagram showing an embodiment of the present invention.
A is a measurement monitoring station, and B is a measurement station. Measuring station B
are 1 line connection circuit, 2 reception code recognition circuit,
3 an analog-to-digital conversion circuit, 4 a transmission control circuit, 5 a clock signal generation circuit, 6 a digital data addition circuit, 7 a measurement number integration circuit, 9
It consists of an average value holding circuit.

Next, this operation will be explained. Note that the line connection circuit 1, the received code recognition circuit 2, and the transmission control circuit 4 are constituted by a known telemeter device, and a detailed explanation thereof will be omitted. In synchronization with the clock signal from the clock signal generation circuit 5, the analog-to-digital conversion circuit 3 converts the instantaneous value of the data to be measured into digital values, which are added each time in the digital data addition circuit 6. On the other hand, in the measurement number integration circuit 7, the clock period of the clock signal generation circuit 5 for integrating the number of additions is determined by the conversion speed of the analog-to-digital conversion circuit 3 and the characteristics of the data under measurement. However, in river water quality monitoring, etc., the cycle is usually 10 seconds to 1 minute.

In this way, measurements are carried out independently at measurement stations,
On the other hand, when a command signal for data transmission is received from the measurement monitoring station, the division circuit 8 is activated, and the addition value of the digital data addition circuit 6 is divided by the integration circuit of the measurement number integration circuit 7 to calculate the average value. Transfer the data to the holding circuit 9 above, and transfer the data to the measurement count accumulation circuit 7.
The adder circuit 6 is cleared to zero and the average value data in the holding circuit 9 is transmitted to the control circuit 4 and the line connection circuit 1.
It will be sent back via.

The average value calculation result holding circuit 9 is used to prepare for a request for data transmission again from the measurement and monitoring station in the event that data cannot be normally transmitted to the measurement and monitoring station A due to the line quality of the transmission line, for example, due to a parity check error.

In this case, it is sufficient to collect data from the measurement and monitoring station A once every hour.

As explained above, according to the present invention, highly accurate average values can be treated as telemeter data, and at the same time, the frequency of use of transmission lines is reduced, and it can be effectively used for calls during maintenance inspections, etc. It has the following major characteristics.

Furthermore, when configuring the transmission line, it is also possible to configure it using the public communication line of the Telegraph and Telephone Public Corporation, which greatly contributes to reducing operating costs.

[Brief explanation of the drawing]

The figure shows a telemeter device according to the present invention, where A indicates a measurement monitoring station and B indicates a measurement station. 1...Line connection circuit, 2...Reception code identification circuit, 3...Analog-digital conversion circuit, 4...
...Transmission control circuit, 5...Clock signal generation circuit,
6...Digital data addition circuit, 7...Measurement number integration circuit, 8...Divide circuit for calculating the average value,
9...Indicates an average value holding circuit.

Claims (1)

[Scope of utility model registration request] A clock signal generation circuit and an analog-to-digital conversion circuit that operates in synchronization with the clock of the clock signal generation circuit and converts measurement analog data into digital values in a measurement station of a telemeter device having a measurement monitoring station and a measurement station. a frequency integration circuit; an addition circuit that adds digital data from the analog-to-digital conversion circuit; a division circuit that divides the addition value of the addition circuit by the integration value of the integration circuit; A measuring station of the telemeter device, characterized in that it has a holding circuit for holding.