JPS607243A - Telemeter recording system - Google Patents

Abstract

PURPOSE:To reduce the time exclusively used for a communication line and also to attain continuous analog recording by providing a time control circuit and a data storage circuit to a terminal station and a central station, storing a measured data at each prescribed time in a terminal station, transmitting the stored data to the central station in the lump, and allowing the central station to store once the data and recording sequentially in analog at each prescribed time. CONSTITUTION:A measured data inputted to a terminal station 101 is sampled by an input converting circuit 3 at each prescribed time T1 from a time control circuit 2 and stored sequentially in a data storage circuit 4 whthin a prescribed time. On the other hand, the central station 20 transmits a transmission request of a data from a line control line 7 to the terminal station 101 at a time interval longer than the said sampling time T1. The terminal station 101 receives the transmission request by a call reception circuit 6 and transmits the stored data to the central station 20 by a transmission circuit 5. The central station 20 receives the data by the reception circuit 9, stores it by a data storage circuit 10, supplies an output sequentially to an analog output circuit 11 from the data storage circuit 10 at a time interval equal to the data input sampling time T1 of the terminal station 101, and records the data by an analog recorder 12.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a telemeter recording system in which measurement data input to a terminal station is recorded in analog form at a central station via a communication line.

(Prior Art) FIG. 1 is a block diagram showing a conventional cyclic transmission telemeter recording system. In the figure, measurement data input to terminal stations 1 to N are constantly transmitted via lines 1 to N, and are constantly recorded in analog form at the central station. Therefore, conventionally, when analog recording was performed using a telemeter device, a communication line was always connected to collect measurement data from the terminal station and record the data constantly. However, if there are a large number of terminal stations, it is necessary to keep the terminal stations connected at all times, which has the drawback of monopolizing a large number of communication lines at all times.

Further, FIG. 2 is a block diagram showing a conventional polling type telemeter recording system. In the figure, terminal station 1
~The measurement data input to the terminal station N is transmitted to the central station via line 1 to line N by the central station's line connection or call, and the central station converts the terminal station data into analog data only when it is transmitted. It was output to a recorder. Therefore, if the communication line is a general public subscriber line or a single radio line and the polling method is used, analog recording is performed only when the central station and terminal station are connected, resulting in a lack of continuity in the recorded content. There were drawbacks.

(Objective of the Invention) The present invention aims to eliminate these drawbacks, and its features include 14. A new clock control circuit and data storage circuit were installed, and the telemeter recording system was used to collect measurement data and transmit it intermittently to a central station.

I will explain this in detail below.

(Structure and operation of the invention) εrS Figure 3 shows an embodiment of the present invention. The figure is
It is a configuration diagram of a telemeter recording system using a bow link method, and includes a time control circuit 2, a human power conversion circuit 3, and a data/evening time product 1.
iii line 4, transmission circuit 5.11'P terminal station 101 to terminal station 1ON consisting of output/reception circuit 6, line control circuit 7, time control circuit 8, reception circuit 9, data storage circuit 10, Analog output circuit 11, analog recorder 1
The central office 20 is composed of two central stations.

In the terminal station lot, the manually inputted measurement data is sampled at fixed time intervals (T,) by the time control circuit 2 in the manual conversion circuit 3, and is sequentially accumulated in the data storage circuit 4 within a predetermined time. Also in the terminal station 102 to terminal station 1ON,
Similar to the terminal station 101, measurement data is accumulated sequentially.

On the other hand, in the central station 20, the line control line 7 is connected to the terminal station IOT at a time interval longer than the sampling time (T1).
sends a request to send data.

Then, the terminal station 101 receives the transmission request through the discharge receiving circuit 6, and transmits the accumulated data to the central station 20 through the transmitting circuit 5. At the central office 20, the receiving circuit 9 receives the data and stores it in the data storage circuit 10. This accumulated data is sequentially output by the time control circuit 8 to the data accumulation circuit 10 or to the analog output circuit 11 at the same time interval as the data input sampling time (T,) of the terminal station 101, and is recorded by the analog recorder 112. . All terminal stations 102 to 10H are also connected to the central station 20.
Similar to the terminal station 101, analog recording is performed at the terminal station 101.

(Effects of the Invention) As described in 1-1, according to the present invention, the terminal station and the central station are provided with a time control circuit and a data accumulation circuit, and the terminal station accumulates 7I11 constant data at regular intervals, The accumulated data is collected and transmitted to the central station17.The central station accumulates the data in -FEL and sequentially records it in analog form at regular intervals, thereby reducing the time spent exclusively on the communication line, and recording the data in analog form. This has the advantage of being carried out continuously.

Therefore, the present invention can be used in a telemeter recording system for measuring data with little change over time, and is particularly effective in a telemeter recording system with a large number of terminal stations.

[Brief explanation of drawings]

, Bt is a block diagram of a conventional continuous cyclic transmission telemeter recording system, FIG. 2 is a block diagram of a conventional bow link type telemeter recording system, and FIG. 3 is a block diagram showing an embodiment of the present invention. . 2...11! ? time control circuit, 3... manual conversion circuit, 4... data accumulation circuit, 5... transmitting circuit, 6...
...Discharge receiving circuit, 7...Line control circuit. 8... Time control circuit, 9... Receiving circuit 10...
Data storage circuit, 11...Analog output circuit 12...
・Analog recording AI, 20...Central station 101~ION
...terminal station. Patent Applicant Oki Electric Co., Ltd. Special 8/l Application Agent JF Osamu Toyamaki Megumi −

Claims (1)

[Claims] In a telemeter system in which measurement data manually input to multiple terminal stations is recorded at a central station via communication lines, each terminal station ``accumulates measurement data within a predetermined period of time and responds to intermittent calls from the central station. A telemeter recording method characterized by sending the accumulated data all at once to a central station, and the central station expands the received data to real time length and sequentially records it.