The Research And Application Of Meter Recognition Based On Engineer Vision

The indicator type appliance automatic diagnosis technology is the key and important foundation for realization of all kinds of indicator type appliance automatic examination.In the indicator type appliance automatic diagnosis's correlation data, the following several question existed. In the ordinary circumstances, appliance dial plate each scale line becomes alone a connected domain, how to address peculiar circumstance that dial plate each scale line compose a connected domain with an arc;Treats examination is artificial subjectively beforehand scheduled well, the examination automation is low, how to enhance the examination automaticity; How to design the illumination way to avoid to present indicator shadow,because of the illumination non-uniform; The reading recognition basically uses the current indicator with angle relations of indicator refer to the zero to calculate measuring appliance's reading, how to enhance accuracy of reading recognition and so on .The following several main aspects work has been done in view of the above several questions:1.Indicator type meter dial line automatic demarcation:with the difference shade law definiting dial plate center of the circle, the numerical information and the scale division line information can be divided. And carries on the inclined scale division figure adjustment and recognize the scale division digit, using scale division line segment Boott to realize the automatic demarcation of the scale division line show value. On the one hand ,the effective solution has been done for artificial beforehand being scheduled subjectively of treated detecting point, on the other hand in the process of distance law reading recognition to provide about scale division line show the value information of the indicator both sides.2. One kind of elimination method of easuring appliance arc: in the middle of the consult date, the object of study is dial plate scale division line mutually independent measuring appliance. In the reality, dial plate scale lines compose a connected domain together with an arc. In view of this kind of peculiar circumstance, based on the difference shade law determination dial plate center of circle , this article take the indicator apex to the center of circle distance as the radius, again take this radius as foundation elimination arc, thus causes each scale line become a connected domain alone.3.Indicator type measuring appliance automatic examination simulation test system's design: to composed system's software and hardware to design, proposed the illumination plan that could avoid the indicator shadow effectively and the indicator type instrument reading method. Finally defers to the examination regulations which the country stipulated to carrie on the automatic examination experiment for the model WXC10 direct current ammeter by the Wuxi Electric instrument Factory production. Examination result deposited in an Excel file. It's the beneficial work for realizing the completely automatic measuring appliance to examine finally.