JPS6160041A - Address setting system - Google Patents

Abstract

PURPOSE:To cope with any change such as connection or unit number change by setting an address at each application of power relating to collection of data by a mobile body such as vehicle and allowing each unit to recognize the address in the order of connection from a data logger. CONSTITUTION:The data logger 4 enters the address set operation sequence after application of power and an address 1 is transmitted to an output line 101 at first. A control section 1b returns the reception of the address 1 to the data logger through an input line 100, and the data logger 4 and an input/output unit 1 recognize the address 1 as the address of the input/output unit 1 to complete the address setting. Then a control line 102 is brought into a high level to open the gate 1d. This procedure is repeated to complete the address set sequence of a prescribed input/output unit, the data logger 4 requests data transmission to each input/output unit while the said address is added sequentially to log the data.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a system that controls a plurality of input/output units and collects data. The present invention relates to an address setting method for specifying the input/output unit.

2. Description of the Related Art In recent years, data collection systems using computers have become popular in research fields and the like for the purpose of comprehensive data collection of experimental data.

It is especially important to collect data while driving in moving objects such as vehicles, but in recent years, memory elements have become more integrated and cheaper, and the reliability of devices against vibrations has improved. A collection system has been realized that is equipped with a system, stores experimental data in a memory, and reads and analyzes the contents of the memory after the experiment is completed.

However, the data collection system for the above mobile objects is small and
Lightweight and adaptable to changes in measurement points.

It requires a configuration that is more flexible than a ground-based installation, such as a scale that can be installed in a limited installation location.

For this reason, for example, a system has been devised in which the interface part with the measurement sensor is made into a unit (hereinafter referred to as an input/output unit) to reduce the size, and a plurality of the units are placed near the measurement point to collect data.

However, the performance and number of units vary depending on the experimental item,
It is not easy to set the address of the unit each time, and there are also problems in data collection management, so a simple address setting method is desired.

[Conventional technology]

A conventional example will be explained using FIG.

Figure 2 fa) fb) (c) shows the conventional input/output unit connection form and address setting method.

1 to 3 are input/output units, and 4 is the central device (hereinafter referred to as data/output unit).
(referred to as a logger).

Figure 2 (al) shows a method in which multiple input/output units 1 to 3 are connected in parallel to the data logger 4 using nine individual connection lines, and the connector number of the data logger 4 indicates the input/output unit. The address of the unit is determined.However, this method has the problem that the number of connection lines increases.

FIG. 2(b) shows a method in which each unit is connected in series and the data of each unit is ORed in the order of connection and sent to the data logger 4, and addresses are identified in the order of the data. This method has the problem that it is difficult to deal with an increase or change in the number of connected units.

FIG. 2(C) shows a system in which each unit is connected to a bus using input/output lines, but each unit requires a switch to set an address.

[Problem that the invention seeks to solve]

As explained above, there are various ways to connect distributed input/output units, but all of them require an increase in the number of connection lines,
When the installation location is changed, there are problems such as difficulty in setting the address.

[Means for solving problems]

The above-mentioned conventional problems include an address setting means in which an input/output unit that receives an address setting signal from a data logger sets the address as its own address, a gate means that opens the signal line after setting the address, and a plurality of the above-mentioned means. According to the present invention, the data logger sequentially sends out address setting signals to sequentially set the addresses of the input/output units in the order in which they are connected. This can be solved using an address setting method.

(Function) According to the present invention, the address setting operation is performed every time the power is turned on, and the address is recognized in each unit in the order of connection from the data logger. There are effects that can be dealt with.

〔Example〕

An embodiment of the present invention will be described using the block diagram of FIG.

In the figure, 4 is the data logger, 1 is the input/output unit 7, 2
The input/output unit 2, 100 is an input line through which data is input to the data logger 4, and 101 is an output line through which data is output from the data logger 4.

The input/output unit 1.2 includes communication controllers 1a and 2a that communicate with the data logger 4, and controllers 1b and 2b that each include a microprocessor and the like.

Interface 1c+2c with the object to be measured and gate l
It consists of d and 2d.

Interfaces lc and 2c are digital inputs.

Ink faces are prepared corresponding to the object to be measured, such as analog input and pulse input, and are converted into signals readable by the control units 1b and 2b through signal converters, respectively. Note that an output interface is also prepared if necessary.

With the above configuration, the address setting operation will be explained below.

First, an input/output unit having an interface according to the object to be measured is installed near the measurement point of the moving body, and the data logger 4 and the input line 100. The output lines 101 are sequentially connected as shown in FIG.

(1) After data logger 4 is powered on, it enters the address setting operation sequence and first sets address 1 to output line 1.
Send to 01.

(27 input/output unit) 1, when the power is turned on, the control unit 1b sets the control line 102 to low level, closes the gate ID,
Sending of the address 1 signal to the input/output unit 2 is prohibited, and the address 1 signal is received and stored in the built-in memory.

The control unit 1b sends back to the data logger 4 through the input line 100 that the address l has been received.

Thereafter, the data logger 4 and the input/output unit 1 recognize address l as the address of the input/output unit 1, and complete the address setting.

Then, the control line 102 is set to high level to open the control line 1d.

(3) When the data logger 4 subsequently sends out address 2, address 2 is sent to the output line 101a.

The input/output unit 2 receives this, and the address is set using the same procedure as described above.

(4) The above procedure is repeated to complete the address setting sequence of a predetermined input/output unit, and thereafter the data logger 4 sequentially assigns the address and requests data transmission to each input/output unit to collect data.

Incidentally, the wires 1d and 2d intervening in the output line (h) are all closed when the power is turned on, but after the address is set, they are all open and function as output lines.

As described above (even if the data collection location is changed and the connection is changed, the address is reset at the same time as the power is turned on, and the address is determined in the order of connection from the data logger 4.

〔Effect of the invention〕

As explained above, (1) according to the present invention, addresses of input/output units that are dispersed are automatically set in data collection where measurement points are dispersed and measurement points are constantly changed, such as collection of experimental data on a mobile object; This has the effect of making it possible to set the settings and making management easier.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention. FIG. 2(a) is a conventional parallel connection diagram. FIG. 2 (bl is a conventional series connection diagram. FIG. 2 (C1 is a conventional bus connection diagram. It is. In the figure. 1.2 is the input/output unit. 4 is a data logger. la and 2a are communication control units, and lb and 2b are control units. IC and 2C are interfaces. ld and 2d are gates It is. Figure 1

Claims (1)

[Claims] This is an input/output unit address setting method for a data collection system that collects data by controlling multiple distributed input/output units. address setting means for setting the address, gate means for opening the signal line after setting the address, and connection means for serially connecting the signal lines of the input/output unit having a plurality of the above means through the gate means; An address setting method characterized in that addresses of input/output units are sequentially set in the order in which they are connected by sequentially sending out address setting signals.