JPH0363900A - Telemeter terminal equipment - Google Patents

Abstract

PURPOSE:To efficiently collect data without increasing the transmission quantity of the data by varying a cycle to fetch the data when detecting the state change of environment with a state change detecting part. CONSTITUTION:The data is fetched in a data input part 4 from a measuring instrument 8 at a constant cycle after starting up a clock circuit 5, and it is processed with a microcomputer 2, and is stored in a memory 6 after attaching time information on the data. When the state change detecting part 3 detects the state change of the outside, the microcomputer 2 varies the sampling cycle of the data, and receives the start-up of the clock circuit 5 at a newly set cycle, and inputs the data from the measuring instrument 8. In such a way, by controlling the sampling cycle in data collection with individual judgement, the observation of a measuring object in which the data is required to be sampled at a short cycle after change occurs once even though the change scarcely occurs can be efficiently performed.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a terminal device of a telemeter system (abbreviated as TM), which inputs measurement target data, stores it in the memory in the TM, and performs polling at a central station. The present invention relates to a data input method for a TM that has the function of transmitting data using a TM.

[Conventional technology]

Conventionally, in this type of TM using a polling method, the TM inputs data by polling at regular intervals from the central office, or inputs data at regular intervals on its own basis.

[Problem to be solved by the invention]

Among the conventional techniques described above, in the method in which the TM inputs data and transmits data by polling the central station at regular intervals, the central station needs to poll at sampling intervals required for data processing. This increases the amount of data to be transmitted and limits the shortening of the polling cycle. Another disadvantage is that it limits the number of TMs that can be installed.

On the other hand, with 7M's unique method of inputting data at regular intervals and transmitting the data intermittently to the central station, it is necessary to constantly input even data that is unnecessary for data processing, which increases the amount of data transmitted, resulting in installation It also has the disadvantage of limiting the number of TMs that can be created.

There is also a cyclic method of data collection, but this method requires excessive equipment and the central station inputs even unnecessary data for all TMs, so the data processing at the central station is difficult. The disadvantage is that the burden becomes heavier.

[Means to solve the problem]

The telemeter terminal device of the present invention includes a data input section that periodically takes in data from a measuring device, a memory that stores the data taken in by the data input section, and a central station that sends the data stored in the memory. a communication control section for transmitting data; a state change detection section for detecting a change in the state of the environment observed by the measuring device; and a cycle at which the data input section takes in the data when the state change detection section detects a change in the state of the environment. and means for changing.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of the present invention.

Normally, in the telemeter terminal device 1, when the clock circuit 5 is activated, the data input section 4 receives data from the measuring device 8 at regular intervals (for example, at one-second intervals). The captured data is processed by the microcomputer 2, time information is added to the data, and then stored in the memory 5, and the operation of waiting for the next activation of the clock circuit 5 is repeated. When the state change detection section 3 detects an external state change, it issues an interrupt to the microcomputer 2. In response to this interrupt, the microcomputer 2 changes the activation period of the clock circuit 5 to a separately set constant period (for example, 10 milliseconds) and changes the data sampling period. Thereafter, the microcomputer 2 activates the clock circuit 5 at a newly set period and inputs data from the measuring device 8. Adding time information to the input data and storing it in the memory 6 is the same as in the normal case.

Input processing in this state continues for a preset time,
After continuing for a certain period of time (for example, 5 minutes), the microcomputer 2 returns the activation cycle of the clock circuit 5, and thereafter the input processing continues at the original sampling cycle (in milliseconds in this example).

The data accumulated in the memory 6 is sent to the central station 1 via the communication control unit 7 and the line network 9 by polling from the central station 10.
Data is sent to 0. Even when the data in the memory 6 approaches its storage capacity, the data is transmitted to the central station 10 via the communication control unit 7.

〔Effect of the invention〕

As explained above, the present invention allows the telemeter terminal device to control the sampling period of data collection based on its own judgment, so that even though there is usually little change, such as when observing seismic waves, For measurement targets that require data sampling in short cycles,
It is effective for efficient observation.

Ru.

DESCRIPTION OF SYMBOLS 1... Telemeter terminal device, 2... Microcomputer, 3... State change detection section, 4... Data input section, 5... Clock circuit, 6... Memory, 7... Communication Control unit, 8... Measuring device, 9... Line network, 10...
Central office (including computer system).

Claims (1)

[Claims] a data input section that periodically takes in data from the measuring instrument; a memory that stores the data taken in by the data input section; a communication control section that sends the data stored in the memory to a central station; The measurement device includes a state change detection unit that detects a change in the state of the environment observed by the measuring device, and means for changing a cycle at which the data input unit takes in the data when the state change detection unit detects a change in the state of the environment. A telemeter terminal device characterized by: