JPS59182306A - Instrumentation controller - Google Patents

Abstract

PURPOSE:To make a high-speed scan by providing a sensor, pulse motor, pulse detecting means, pulse motor driving means, data sampling signal generating means, and data sampling means. CONSTITUTION:A CPU10 corrects the set value of the extent of movement of the pulse motor 15 and the converted value of data from the sensor 1 on the basis of the switching state of an ND filter detected by a sensor switching detection part 2. The driving instruction of the pulse motor 15 is outputted to a pulse motor controller 12 through an output port 9 to generate a pulse by a pulse generator 14. On the other hand, pulses detected by a pulse detection part 3 are counted by a counter 4 to generate a data sampling signal when the counted value coincides with data on a measurement interval set in a register 7. An A/D converter 5 converts an analog signal into a digital signal by said data sampling signal and the digital signal is inputted to the CPU10 through an input port 8. Then, the data is stored in a storage circuit 11.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a measurement control device using a microcomputer.

Configuration of conventional examples and their problems In recent years, measuring devices utilize microcomputers, and automatic measurement is progressing.

Conventionally, in measuring devices that obtain position-related information using a microcomputer, position setting is performed by pulse motor drive (force, pulse motor stop &
%2.(e) and sampling (n) to capture the information signal. However, this method has problems in that it is disadvantageous for high-speed scanning and takes time to measure when there are a large number of measurement points.

OBJECTS OF THE INVENTION The present invention solves the above-mentioned conventional problems, and aims to provide a measurement control device that can shorten processing time and efficiently use a CPU.

Structure of the Invention As shown in FIG. 2, the present invention comprises a pulse detection means a, a sensor b, a sensor switching detection means C, a pulse motor drive means d, a set value correction means e, and a data sampling signal generation means. This is a measurement control device having a basic configuration including a data sampling means q, a converted value correction means, a data output means 1, a pulse motor], and an output terminal k. It is possible to perform measurements using high-speed scanning without being affected by response delays.

DESCRIPTION OF EMBODIMENTS The present invention will be described in detail below. FIG. 3 is a block diagram of an electronic control circuit according to an embodiment of the present invention.

Note that the measuring device of this embodiment is a measuring device that measures illuminance distribution.

In FIG. 3, the illuminance distribution measuring device of this embodiment moves a light receiver (sensor 1) using a pulse motor 15 based on a command from a CPU 10. As shown in FIG.

While the sensor 1 is moving, a pulse detecting section 3 detects a pulse (output from a pulse generator) that drives the pulse motor 15, and a counter 4 integrates the detected pulse. A digital comparator 6 compares this integrated value with a set value set in a register 7 by the CPU 10, and when they match, the analog signal from the sensor 1 is converted into a digital signal by an A/D converter 5. sample the data (signal).

Furthermore, by clearing the counter 4 at the time of sampling and performing pulse detection again, the signal from the sensor 1 can be sampled at intervals of the set value of the register 7.

Here, 11 is a storage circuit that stores measurement procedures and set values in advance, and stores data sampled by the above-mentioned measurement operation, and 8 and 9 are input ports and output ports that control the input and output of the CPU 1Q. port, 12
id, a pulse motor controller 13 that receives a drive command for the pulse motor 16 from the CPU 10 via the output port 9 and controls a pulse generator 14 that generates drive pulses for the pulse motor 15 based on the command. A CRT that displays and outputs data.

This is an output terminal such as an X-Y plotter.

In addition, when the sensor 1 needs a wide measurement range, the sensitivity of the sensor 1 may be changed, or the sensor 1 may have a wide measurement range.
exchange etc. At this time, the sensor switching detection section 2 detects the sensitivity switching of the sensor 1 and the type of the sensor 1 being used, and thereby corrects the movement amount setting value of the pulse motor 16 and detects the data (signal) from the sensor 1. ) will be corrected. Furthermore, since the sampling interval is changed based on the detection result of the sensor switching section, the set value of the register 7 can be corrected.

That is, in this embodiment, in order to switch the sensitivity of the sensor 1 (light receiver), the ND filter installed in the sensor 1 is switched, and this filter switching is detected by the sensor switching detection section 2 to perform the above correction. This is what we do.

FIG. 4 is a flowchart showing the control procedure of this embodiment. Based on FIG. 4, the operating procedure of this embodiment will be explained using FIGS. 2 and 3.

First of all, in the sensor switching detection section 2, the N
Detects the switching state of the D filter.

(Sensor switching detection means) Second, based on this detection state, the pulse motor 1
The CPU 10 corrects the movement amount set value of No. 5 and the converted value of the data (signal) from the sensor 1. (Set value correction means, converted value correction means) Although not shown in FIG. 2, the set value of the register 7 is corrected based on the detection state obtained by the sensor switching detection means, and the sampling interval is can be changed.

The movement amount is corrected for the following reasons.

In this embodiment, changing the sensitivity of the sensor 1 means changing the measurement target, and the sensor 1 (
This is because the relative position between the light receiver) and the measurement target changes. In addition, when replacing the sensor 1,
This is because the detection position of the sensor 1 shifts when the sensor 1 is replaced.

Furthermore, the correction of the converted value of data (signal) is performed for the following reasons.

In this embodiment, the photoelectric output (voltage value) of the sensor 1 is converted into a digital signal by the A/D converter 5,
Furthermore, it is necessary to convert this into an illuminance value. That is,
The illuminance value is obtained by multiplying the voltage value by a converted value. When the sensitivity of the sensor 1 is changed, this converted value must also be changed, and the above correction becomes necessary.

Thirdly, in order to move the sensor 1 based on the set value of the movement point corrected by the set value correction means, a drive command for the pulse motor 16 is sent from the CPU 1o to the pulse motor controller 12 via the output port 9. Output. The pulse motor controller 12 causes the pulse generator 14 to generate pulses based on this drive command, and drives the pulse motor 16. (Pulse Motor Driving Means) When the drive command is output to the pulse motor controller 12, the pulse detection section 3 detects a pulse for driving the pulse motor 15. (Pulse Detection Means) A specific example of the pulse detection section 3 is shown in FIG.

In this embodiment, the pulse motor 15 has a 4-phase input (
input phase, B phase, C phase, D phase), and A phase and C phase.

B phase and D phase are in phase. Therefore, pulse detection is performed using A-phase and B-phase pulse inputs. FIG. 5 is a diagram showing the phase and B phase of the input pulse of the pulse motor 15. The rise and fall of the input phase and B phase pulses can be detected in proportion to the rotation speed of the pulse motor 15. Therefore, the pulse detection section 3 can be configured with a circuit as shown in FIG. 6, and the output will be as shown in FIG. 5(S).

A counter 4 integrates the pulses as shown in FIG. and when they match, generate a data sampling signal. At this time, the integrated value of the counter 4 is also cleared, and the counter 4 starts integrating again. (Data Sampling Signal Generating Means) When a data sampling signal is generated, the A/D converter 5 receives the sampling signal and converts the analog signal from the sensor 1 into a digital signal.

Further, the data sampling signal is sent to the CPU 10 via the input port 8. When the data sampling signal is sent to the CPU 10, the data converted into a digital signal by the A/D converter 5 is input (sampled) via the input port 8. The data sampled by the CPU 10 is multiplied by the conversion value (corrected value), converted into illuminance, and stored in the storage circuit 11. (Data sampling means) In the measuring device of this embodiment, the pulse motor 15
The purpose is to continuously measure the illuminance at regular intervals while driving the sensor once, and when one sampling is completed, the process returns to the pulse detection and integration operations described above for sequential sampling.

However, once the sampling number preset in the CP'U 10 has been sampled, the process moves to the next step.

When using this measuring device to measure not only a straight line but also a two-dimensional plane, the sensor 1 (photoreceiver) is moved in a direction perpendicular to the scanning direction by the pulse motor 15, and the above-mentioned process is performed as shown in the flowchart of FIG. By repeating the operation, data on a two-dimensional plane can be obtained.

Note that the storage circuit 11 not only stores sampled data but also stores instructions for controlling the above-mentioned operations. Furthermore, the data stored in the memory circuit 11 is
It can be appropriately processed by the CPU 10 and output to the output terminal 13.

As described above, according to this embodiment, by providing the pulse detection means, the data sampling signal generation means, the sensor switching detection means, and each correction means, it is possible to perform measurement at a higher speed than the conventional word measurement device. Even if the sensor is switched, this can be detected and the three corrections described above can be automatically performed accordingly.

In the present embodiment, a pulse motor with four phase input has been described, but a pulse motor with four or more phases can be used in the same manner.

Effects of the Invention As is clear from the description of the embodiments described above, the measurement control device of the present invention is composed of a sensor, a pulse motor, a pulse detection means, a pulse motor drive means, a data sampling signal generation means, and a data sampling means. can be measured, and its practical effects are significant.

[Brief explanation of the drawing]

Fig. 1 is a flowchart of a conventional measurement control device, Fig. 2 is a block diagram showing the configuration of the present invention, Fig. 3 is a block diagram of an electronic control circuit of an embodiment of the present invention, and Fig. 4 is a control diagram of the present embodiment. A flowchart showing the procedure, FIG. 5 is a diagram showing the drive pulse of the pulse motor in this embodiment and a pulse inspection signal output from the pulse detection section, and FIG. 6 is a diagram showing a specific example of the pulse detection section. . a...Pulse detection means for detecting pulses that drive the pulse motor, b...Sensor for measuring the measurement target, C...Sensor switching detection for detecting switching of the sensor. Section d...Pulse motor drive means,
e: Set value correction means for correcting the set value of the displacement of the pulse motor drive means, f: Data sampling signal that generates a timing signal for sampling data (signal) from the sensor. Generating means, q...
・Sampling means for data (signal) from the sensor, h...Conversion value correction means for correcting the data conversion value of the data sampling means, j...For moving the sensor or the measurement target. pulse motor,
DESCRIPTION OF SYMBOLS 1... Said sensor, 2... Sensor switching detection section, 3-
... Pulse detection section, 4 ... Counter, 5 ...
A/D converter, 6...Digital comparator, register, 8...Input port, 9...Output port 1-11
0 CPU, 11... Memory [1Ii4.12...
・Pulse motor controller, 13...output terminal,
14...Pulse generator, 15...Pulse smoke. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2

Claims (1)

[Claims] A pulse detection means for detecting a pulse that drives a pulse motor, a sensor for measuring a measurement object, a sensor switching detection means for detecting switching of the sensor, a pulse motor drive means, and a movement amount setting of the pulse motor drive means. a set value correction means for correcting the value; a data sampling signal generation means for generating a timing signal for sampling data (signal) from the sensor; a data sampling means for sampling the data (signal) from the sensor; A measurement control device comprising a conversion correction means for correcting a data conversion value of a data sampling means, and a pulse motor for moving the sensor or the object ω1j.