CN-121995512-A - Detection device

CN121995512ACN 121995512 ACN121995512 ACN 121995512ACN-121995512-A

Abstract

The application relates to a detection device which comprises a base, a conveying assembly and an optical fiber sensing assembly, wherein the conveying assembly comprises a driving wheel and a conveying belt, the driving wheel is connected to the base in a driving way, the conveying belt is sleeved on a plurality of driving wheels and used for bearing and conveying a PCB (printed circuit board), a through groove is formed in the conveying belt along the conveying direction, the optical fiber sensing assembly comprises a main shell and an optical fiber head, the main shell is arranged on the base, the optical fiber head is opposite to the through groove, and the optical fiber head is flush with a bearing surface of the conveying belt so as to detect the PCB on the bearing surface of the conveying belt. According to the detection device provided by the application, the optical fiber sensing assembly is built in, so that the optical fiber head passes through the through groove on the conveyor belt, and the optical fiber head can sense the PCB right above from the inside of the conveyor belt, thereby greatly enhancing the strength and stability of detection signals. Through with the embedded setting of fiber assembly in the through groove of conveyer belt, can improve the accuracy of detecting PCB board existence state.

Inventors

HUANG LIANG
TAN LIANG
LIU KUI
SHAO YONGFENG

Assignees

广东艾富瑞测试技术有限公司

Dates

Publication Date: 20260508
Application Date: 20260123
Priority Date: 20251107

Claims (10)

1. The detection device is characterized by comprising a base, a conveying assembly and an optical fiber sensing assembly, wherein the conveying assembly comprises a driving wheel and a conveying belt, the driving wheel is connected to the base in a driving mode, the conveying belt is sleeved on the driving wheels, the conveying belt is used for bearing and conveying a PCB, a through groove is formed in the conveying belt along the conveying direction, the optical fiber sensing assembly comprises a main shell and an optical fiber head, the main shell is arranged on the base, the optical fiber head is opposite to the through groove, and the optical fiber head is flush with a bearing surface of the conveying belt so as to detect the PCB on the bearing surface of the conveying belt.
2. The apparatus of claim 1, wherein the fiber optic head is located at an end of the conveyor belt.
3. The apparatus of claim 2, wherein the conveyor belt has opposite first and second ends, the first and second ends each having one of the fiber optic heads.
4. The apparatus according to claim 2, wherein the optical fiber heads at both ends of the conveyor belt are disposed opposite to each other in a conveying direction of the conveyor belt.
5. The apparatus according to claim 1, wherein the through groove is located in a widthwise middle region of the conveyor belt.
6. The device of claim 1, wherein the fiber optic head is positioned in the through slot.
7. The apparatus of claim 1, wherein the through slot extends along a length of the conveyor belt.
8. The device of claim 1, wherein the depth of the through slot is 0.5 to 0.8 times the thickness of the PCB.
9. The apparatus according to claim 1, wherein the main housing has a mounting groove formed therein, a notch of the mounting groove is opposite to the conveyor belt, the optical fiber head is mounted in the mounting groove, the surface of the main housing having the notch formed therein has a concave or inclined surface structure, a shape of a distal end of the conveyor belt is adapted to the concave or inclined surface structure, and the distal end of the conveyor belt is located in the concave or inclined surface structure and forms a space therebetween.
10. The apparatus according to claim 1, wherein a cover member is provided above the conveyor belt at a distance, the cover member covering the carrying surface.

Description

Detection device Technical Field The invention relates to the technical field of detection, in particular to a detection device. Background In the fields of electronic manufacturing, semiconductors and the like, the automatic production and detection of thin plate-shaped workpieces (such as PCBA plates with the thickness less than or equal to 2 mm) are very important. At present, the traditional assembly line is matched with the photoelectric sensor to perform in-place detection in the industry. However, this conventional solution has significant limitations. First, in an installation, the sensor is typically deployed side-mounted or suspended above the belt, which senses the angle of the beam with respect to the plane of the workpiece. For ultrathin workpieces, tiny vibration or position deviation which is difficult to avoid in the conveying process is extremely easy to cause that light beams are not effectively shielded, so that missed detection is caused, and secondly, the detection sensitivity of a common photoelectric sensor on thinner workpieces is unstable, the signal change of the ultrathin workpieces is weak, the signal jitter is easy to generate on workpieces with critical thickness, and the false alarm rate is high. The thin PCBA board is light in weight and weak in rigidity, and is easy to drift under belt shake, and a traditional blocking structure and a detection unit lack of linkage, so that position uncertainty is further amplified, detection reliability is insufficient, and production rhythm and quality control efficiency are severely restricted by frequent fault alarms. Therefore, there is a need in the market for a detection device capable of stably detecting a PCB. Disclosure of Invention Based on the above, the application provides the detection device, which can improve the accuracy of detecting the existence state of the PCB by arranging the optical fiber assembly in the penetration groove of the conveyor belt in an embedded manner. The detection device comprises a base, a transmission assembly and an optical fiber sensing assembly, wherein the transmission assembly comprises a transmission wheel and a transmission belt, the transmission wheel is in transmission connection with the base, the transmission belt is sleeved on a plurality of transmission wheels and is used for bearing and transmitting a PCB, a through groove is formed in the transmission belt along the transmission direction, the optical fiber sensing assembly comprises a main shell and an optical fiber head, the main shell is arranged on the base, the optical fiber head is opposite to the through groove, and the optical fiber head is flush with a bearing surface of the transmission belt so as to detect the PCB on the bearing surface of the transmission belt. In detection device, through arranging the optical fiber sensing assembly in, make the optical fiber head pass through the through groove on the conveyer belt to set up the sensing surface flush with the conveyer belt loading surface, make the optical fiber head can be followed the conveyer belt inside and responded to the PCB board directly over, thereby greatly strengthened the intensity and the stability of detected signal. For a thin workpiece which is easy to deviate due to vibration, the same-plane detection mode ensures that even if the PCB has micro warpage or jitter, the main body part of the workpiece can reliably shield or reflect signals, thereby effectively avoiding missing detection and misjudgment caused by distance change or inclination of the PCB, and remarkably improving the reliability and precision of detection. Through with the embedded setting of fiber assembly in the through groove of conveyer belt, can improve the accuracy of detecting PCB board existence state. In one embodiment, the fiber optic head is located at the end of the conveyor belt. In one embodiment, the conveyor belt has opposite first and second ends, each of which is provided with one of the optical fiber heads. In one embodiment, the optical fiber heads at both ends of the conveyor belt are disposed opposite to each other in the conveying direction of the conveyor belt. In one embodiment, the through groove is located in a middle region of the conveyor belt in a width direction. In one embodiment, the fiber optic head is located in the through slot. In one embodiment, the through slot extends along the length of the conveyor belt. In one embodiment, the depth of the through groove is 0.5 to 0.8 times the thickness of the PCB. In one embodiment, the main housing is provided with a mounting groove, a notch of the mounting groove is opposite to the conveyor belt, the optical fiber head is mounted in the mounting groove, the surface of the main housing provided with the notch is provided with a concave surface or an inclined surface structure, the shape of the tail end of the conveyor belt is matched with the concave surface or the inclined surface structure, and the tail end of t