JPH06201413A - Sensor drive - Google Patents

Abstract

(57) [Abstract] [Purpose] To obtain a sensor drive device capable of easily responding to addition or modification of a sensor. A general-purpose program 20 for driving a sensor device by a CPU 10 and a data table 22 composed of unique data necessary for driving each sensor device 16 are prepared, and a data table 22 is added when a sensor is added or changed.
It is configured so that it can be handled only by changing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sensor driving device, and more particularly to a device capable of easily adding or changing a sensor.

[0002]

2. Description of the Related Art Recently, measurement data is directly collected from a sensor and input to a computer to perform predetermined data processing,
A system has been devised that outputs the result in real time. The sensor drive device in this system has conventionally been generally configured as shown in FIG. That is, C
The PU 10 and the external sensor device 16 are connected via the sensor interface board 14, and the CPU 10 drives the sensor device 16 in accordance with a program stored in the memory 12 (sensor control and data collection). When driving a plurality of sensor devices 16, a separate sensor interface board 14 is used for each sensor device 16 and a separate device address is set.

Driving such a sensor device is usually
This is done by issuing a command according to the sensor device 16 from the CPU 10 to the sensor interface board 14 according to the program in the memory 12. The flow of signal data at this time is as shown in FIG. That is, CP
The U10 outputs a sensor activation command corresponding to the sensor device 16 driven to the sensor interface board 14 according to the control program, and controls the sensor device 16 through the sensor interface board 14. The measurement data collected by the sensor device 16 is transmitted to the CPU 10 through the sensor interface board 14, and the CPU 10 executes arithmetic processing of the measurement data according to the sensor device 16 according to the data processing program. Therefore, the driving method of the sensor has versatility.

[0004]

However, in such a conventional sensor driving system, the program in the memory 12, the sensor interface board 14, and the device address correspond to each other on a one-to-one basis. When adding or changing sensors, the programs (control program and data processing program) in the memory 12 must be changed according to the number and types of sensor devices and their data operation methods.

The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to provide a sensor drive device capable of easily adding or changing a sensor without changing a program. And

[0006]

The present invention for achieving the above object is common to control arithmetic means for controlling a sensor device and arithmetic operation of measurement data, and all sensor devices connected to the control arithmetic means. And a second storage means for storing a table of unique data necessary for driving each sensor device. .

[0007]

In the present invention thus constructed, when the selected sensor device is driven, the control calculation means is stored in the second storage means in accordance with the general-purpose program stored in the first storage means. While looking up the unique data corresponding to the sensor device in the stored data table, the sensor device is controlled to collect measurement data and execute a predetermined calculation. Therefore, even when the sensor device is added or changed, it can be easily dealt with by simply changing the data table without changing the general-purpose program.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic configuration diagram of a sensor driving device according to an embodiment of the present invention, FIG. 2 is a diagram showing an example of a data table of the present embodiment, and FIG. 3 is a flowchart showing an operation of the present embodiment. The same parts as those in FIG. 4 are designated by the same reference numerals.

As shown in FIG. 1, this sensor driving device stores a CPU 10 which is a control calculation means for controlling the sensor device 16 and calculating measurement data obtained from this, and a general-purpose program 20 executed by this CPU 10. A data table 22 in which unique data necessary for driving the first storage unit 12A and each sensor device 16 is set.
A memory 12 having a second storage means 12B for storing
It has a sensor interface board 14 that connects the CPU 10 and each sensor device 16. The sensor interface board 14 is provided for each sensor device 16. In the present embodiment, an example in which a one-dimensional distance measuring sensor 16B is added in addition to the two-dimensional image sensor 16A is shown. The two-dimensional image sensor 16A is connected to the CPU 10 via the sensor interface board 14A, and the one-dimensional distance measuring sensor 16B is the sensor interface board 1.
It is connected to the CPU 10 via 4B. The CPU 10, the memory 12, and the sensor interface boards 14A and 14B are respectively housed in the rack 18 in the form of substrates.

The CPU 10 controls the sensor device 16 to be driven and arithmetically processes the measurement data while looking up the data table 22 in the same memory 12 according to the general-purpose program 20 in the memory 12. The general-purpose program 20 is a program that can be used in common with any sensor device 16, and describes processes and procedures to be performed by the CPU 10 regarding control of the sensor device 16 and data arithmetic processing. Further, the data table 22 is set with specific data necessary for control of the sensor device 16 and data collection / calculation for all the connected sensor devices 16, and FIG. 2 shows an example of the data table. There is. As shown in FIG. 2, the data table 22 has parameters (data read address, read method, data length, work area address) necessary for setting the sensor device 16 to be used.
An address for connecting the sensor device 16 (device address), a type of the sensor 16 (sensor type), a parameter (calculation method) indicating what to calculate from the captured data, and the like are set in advance. When the sensor device 16 is added or changed, the data table 22 is changed accordingly. That is, when the sensor device 16 is added, the unique data for the additional sensor device is added to the data table 22, and when the sensor device 16 is changed, the changed data in the data table 22 is rewritten. At this time, there is no need to change the general-purpose program 20.

The operation of the sensor driving device thus configured will be described with reference to the flow chart of FIG. 3, but here, the case of driving the two-dimensional image sensor 16A will be described as an example.

First, the CPU 10 selects the sensor device 16 to be driven based on an external input signal or program (S1). Here, the two-dimensional image sensor 16A
Select. Then, the general-purpose program 20 is read (S2), and the two-dimensional image sensor 1 in the data table 22 is read.
While looking up the portion 6A (S3), the two-dimensional image sensor 16A is controlled according to the control program (S4). Specifically, the sensor interface board 14A sends a data acquisition start signal and a parameter setting signal necessary for data acquisition to the two-dimensional image sensor 16A.
To output the output through the two-dimensional image sensor 16A. Then, the measurement data collected by the two-dimensional image sensor 16A is loaded through the sensor interface board 14A (S5). Then, the CPU 10 performs an arithmetic process on the captured measurement data according to a data processing program while looking up the data table 22 to obtain a hole center coordinate value (x, y), for example (S).
6). The calculation result is output in the form of a control command or a report. The above operation is executed for all of the predetermined number of driven sensor devices 16 (S7). The linear distance L between the one-dimensional distance measuring sensor 16B and the object to be measured is measured.

As described above, according to this embodiment, the CPU 1
Regarding the driving method of the sensor device 16 by 0, instead of directly accessing the sensor device 16 by a program as in the conventional case, a general program 20 common to any sensor device 16 and a unique program necessary for driving each sensor device 16 are provided. A data table 22 consisting of data is prepared, and these general-purpose program 20 and data table 2 are prepared.
Since the method of combining with 2 is adopted, the sensor device 1
Even in the case of adding or modifying 6, the general-purpose program 20 can be easily dealt with by simply modifying the data table 22.

[0014]

As described above, according to the present invention, the addition or change of the sensor device can be coped with only by changing the data table without changing the program.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a sensor driving device according to an embodiment of the present invention.

FIG. 2 is a diagram showing an example of a data table of the present embodiment.

FIG. 3 is a flowchart showing the operation of this embodiment.

FIG. 4 is a schematic configuration diagram showing an example of a conventional sensor driving device.

5 is a block diagram showing a flow of signal data in the apparatus of FIG.

[Explanation of symbols]

 10 ... CPU (control calculation means) 12 ... Memory (first storage means, second storage means) 14 ... Sensor interface board 16 ... Sensor device 20 ... General-purpose program 22 ... Data table

Claims (1)

[Claims] 1. A control calculation means for controlling a sensor device and calculating measurement data, and a general-purpose program adapted to the control calculation means that can be commonly used by all the sensor devices connected to the control calculation means. A sensor drive device comprising: a first storage means for storing; and a second storage means for storing unique data necessary for driving each sensor device.