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CN-116945767-B - Nozzle detection method and device

CN116945767BCN 116945767 BCN116945767 BCN 116945767BCN-116945767-B

Abstract

A head detecting method and a head detecting apparatus are provided, the head detecting method including the steps of fixing a head to be detected at a fixed point of a predetermined height perpendicular to a substrate, driving the head to spray a first pattern on the substrate, capturing a first image of the first pattern, and determining whether a nozzle of the head is clogged based on the first image.

Inventors

  • LU LIGUO

Assignees

  • 镭亚股份有限公司
  • 镭亚电子(苏州)有限公司

Dates

Publication Date
20260508
Application Date
20220415

Claims (16)

  1. 1. A method of showerhead detection comprising: fixing the nozzle to be tested at a fixed point of a preset height vertical to the substrate; Driving the spray head to spray a first pattern on the substrate; turning over the substrate; Capturing a first image of the first pattern on the flipped substrate, and Determining whether a nozzle of the spray head is clogged based on the first image.
  2. 2. The method of claim 1, further comprising: fixing a reference showerhead at the fixed point of the predetermined height perpendicular to the substrate; Driving the reference spray head to spray a reference pattern on the substrate, and A reference image of the reference pattern is captured, Wherein the reference spray head and the spray head to be tested have the same nozzle shape.
  3. 3. The method of claim 2, wherein determining whether a nozzle of the spray head is clogged based on the first image comprises: comparing the first image with the reference image to obtain difference information between the first image and the reference image, and Determining whether a nozzle of the spray head is clogged based on the difference information.
  4. 4. The method of claim 3, wherein determining whether a nozzle of the spray head is clogged based on the difference information comprises: If the difference information is greater than a first threshold, determining that the nozzle of the spray head is clogged, Otherwise, if the difference information is smaller than or equal to the first threshold value, determining that the nozzle of the spray head is not blocked.
  5. 5. The method according to any one of claims 1 to 4, wherein the nozzle shape of the spray head to be tested is any one of a circle, an ellipse, a square, a rectangle, and a sector.
  6. 6. The method according to any one of claims 1 to 4, wherein the nozzle shape of the spray head to be tested is a one-dimensional or two-dimensional array of a plurality of spray holes.
  7. 7. The method of claim 6, each of the plurality of orifices having a shape of any one of a circle, an ellipse, a square, a rectangle, a sector.
  8. 8. The method of claim 4, wherein the first threshold is less than or equal to 10%.
  9. 9. A spray head detection device, comprising: A fixture configured to hold a showerhead to be tested; A substrate configured to carry a first pattern sprayed by the showerhead when the showerhead to be tested is fixed at a fixed point of a predetermined height perpendicular to the substrate, and further configured to be flipped after the substrate has carried the first pattern; an image capturing section configured to capture a first image of the first pattern on the flipped substrate, and And a data processing section that determines whether a nozzle of the head is clogged based on the first image.
  10. 10. The detecting device according to claim 9, wherein, The fixture is further configured to secure a reference showerhead at the fixed point of the predetermined height perpendicular to the substrate; the substrate is also configured to carry a reference pattern sprayed by the reference spray head, and The image capturing section is further configured to capture a reference image of the reference pattern, Wherein the reference spray head and the spray head to be tested have the same nozzle shape.
  11. 11. The detection apparatus according to claim 10, wherein the data processing portion determining whether the nozzle of the head is clogged based on the first image includes: comparing the first image with the reference image to obtain difference information between the first image and the reference image, and Determining whether a nozzle of the spray head is clogged based on the difference information.
  12. 12. The detection apparatus according to claim 11, wherein the data processing portion determining whether a nozzle of the head is clogged based on the difference information includes: If the difference information is greater than a first threshold, determining that the nozzle of the spray head is clogged, Otherwise, if the difference information is smaller than or equal to the first threshold value, determining that the nozzle of the spray head is not blocked.
  13. 13. The detection apparatus according to any one of claims 9 to 12, wherein the nozzle shape of the head to be detected is any one of a circle, an ellipse, a square, a rectangle, and a fan.
  14. 14. The detection apparatus according to any one of claims 9 to 12, wherein the nozzle shape of the head to be detected is a one-dimensional or two-dimensional array of a plurality of nozzle holes.
  15. 15. The detection device according to claim 14, wherein each of the plurality of nozzle holes has a shape of any one of a circle, an ellipse, a square, a rectangle, and a fan.
  16. 16. The detection apparatus of claim 12, wherein the first threshold is less than or equal to 10%.

Description

Nozzle detection method and device Technical Field The application relates to the technical field of detection of spray printing and spraying equipment, in particular to a detection method and a detection device of an industrial spray head. Background Industrial spray heads are widely used in spray printing equipment in the fields of advertisement spray painting, printed matter production, screen printing and the like. The traditional industrial spray head is manufactured by using piezoelectric ceramics, and has high requirements on ambient temperature, humidity, cleanliness and the like. If a certain environmental condition cannot be achieved, the spray holes of the spray heads are easily blocked, so that the sprayed product is defective or defective. Currently, in some high-end inkjet printing apparatuses, a high-precision head detection apparatus has been equipped so as to be able to detect the head state of the inkjet printing apparatus in real time and accurately. However, such high-precision detecting apparatuses are generally dedicated to specific inkjet printing apparatuses and are complicated in structure, high in cost, and not suitable for general application scenes. Disclosure of Invention The present application has been made to solve the above problems. The object of the present application is to provide a simple and reliable detection method and detection device which can be applied to various scenes and various industrial spray heads, and which can detect whether the spray head is clogged or not by capturing a pattern sprayed by the spray head and then comparing it with the shape of a known spray head nozzle. One aspect of the present disclosure provides a showerhead detection method including fixing a showerhead to be tested at a fixed point of a predetermined height perpendicular to a substrate, driving the showerhead to spray a first pattern on the substrate, capturing a first image of the first pattern, and determining whether a nozzle of the showerhead is clogged based on the first image. In some embodiments, the method further includes fixing a reference spray head at the fixed point of the predetermined height perpendicular to the substrate, driving the reference spray head to spray a reference pattern on the substrate, and capturing a reference image of the reference pattern, wherein the reference spray head and the spray head to be tested have the same nozzle shape. In some embodiments, determining whether the nozzle of the spray head is clogged based on the first image includes comparing the first image to the reference image to obtain difference information therebetween, and determining whether the nozzle of the spray head is clogged based on the difference information. In some embodiments, determining whether the nozzle of the spray head is clogged based on the difference information includes determining that the nozzle of the spray head is clogged if the difference information is greater than a first threshold, and otherwise determining that the nozzle of the spray head is not clogged if the difference information is less than or equal to the first threshold. In some embodiments, the nozzle shape of the nozzle to be tested is any one of a circle, an ellipse, a square, a rectangle, and a fan. In some embodiments, the nozzle shape of the nozzle to be tested is a one-dimensional or two-dimensional array formed by a plurality of spray holes. In some embodiments, each of the plurality of orifices has a shape that is any one of circular, oval, square, rectangular, and fan-shaped. In some embodiments, the first threshold is less than or equal to 10%. Another aspect of the present disclosure provides a head detection apparatus including a jig configured to fix a head to be detected, a substrate configured to carry a first pattern sprayed by the head when the head to be detected is fixed at a fixed point of a predetermined height perpendicular to the substrate, an image capturing section configured to capture a first image of the first pattern, and a data processing section determining whether a nozzle of the head is clogged based on the first image. In some embodiments, the fixture is further configured to secure a reference spray head at the fixed point of the predetermined height perpendicular to the substrate, the substrate is further configured to carry a reference pattern sprayed by the reference spray head, and the image capturing portion is further configured to capture a reference image of the reference pattern, wherein the reference spray head and the spray head to be tested have the same nozzle shape. In some embodiments, the data processing portion determining whether the nozzle of the spray head is clogged based on the first image includes comparing the first image with the reference image to obtain difference information therebetween, and determining whether the nozzle of the spray head is clogged based on the difference information. In some embodiments, the data processing