JPS60179852U - Surface defect measurement device - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the surface defect measuring device according to the invention, FIG. 2 is a block diagram of the measuring head 1 shown in FIG. 1, and FIG. 3 shows a two-dimensional array of pixels of the image sensor 5. 4 is a block diagram showing the specific configuration of the control circuit 20, FIGS. 5 and 6 are flowcharts showing the contents of the program executed by the microcomputer 44, and FIG. 7 is a diagram showing the control circuit 20. 8 is a timing chart showing the operating state of each part of the image sensor 5. FIG. 9 is a timing chart showing the positional relationship of each pixel that shares the image Q captured by the image sensor 5. FIG. FIG. 10 is a diagram showing the state of measurement of surface defects on the inner circumferential surface 81 of the workpiece 80, and FIG. 80
FIG. 12 is a diagram showing the relationship between the output voltage of the image sensor 5 and the reference voltage when dust adheres to the inner circumferential surface 81 of the image sensor 5.
The figure shows the relationship between the output voltage of the image sensor 5 and the reference voltage level when there are blowholes, scratches, etc. on the inner circumferential surface 81 of the work 80. FIG. 7 is a diagram showing an image displayed on the screen of the image display unit 47 when defects such as cavities and scratches occur or when dust or the like is attached. Measuring head, 2... Light source lamp, 3... Fisheye lens, 4... Optical fiber, 5... Image sensor, 10... Vertical feed motor, 12... Left and right feed base,
14... Left and right feed motor, 17, 18... Drive circuit, 20... Control circuit, 21... Display unit, 47
...Image display section. (H) Gekikou L

Claims (1)

[Scope of utility model registration request] An image sensor that irradiates light along the inner circumferential surface of an object to be measured, collects the reflected light with a condensing lens, and has pixels arranged in a two-dimensional array so as to be perpendicular to the optical axis of the condensing lens. A measurement head that performs photoelectric conversion and outputs an image signal corresponding to each detection area on the inner peripheral surface of the object to be measured, and a measurement head that takes in the image signal of the measurement head and outputs an image signal at each detection area of the object to be measured and an image signal corresponding to the detection area. and compares it with standard data that indicates the standard value of the amount of received light stored in advance to determine the presence or absence of defects and the presence or absence of dust, etc. on the inner circumferential surface of the object to be measured, and displays the determination results as an image, etc. At the same time, the measurement head is moved along the inner peripheral surface of each object to be measured during measurement, and each time the measurement of one object is completed, the measurement start position of another object is sequentially determined. a control circuit that outputs a control signal to move the measuring head to the desired position, a driving means that drives the measurement head based on the control signal from the control circuit, and a display signal that receives the display signal from the control circuit to display the measurement results of the object to be measured. 1. A surface defect measuring device comprising a display means for displaying a display.