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CN-122015743-A - High-precision sensor detection mechanism

CN122015743ACN 122015743 ACN122015743 ACN 122015743ACN-122015743-A

Abstract

The invention belongs to the field of industrial automatic detection, and particularly relates to a high-precision sensor detection mechanism which comprises a sensor protection shaft, a high-precision distance measuring sensor, a guide shaft sleeve and a transition block, wherein the sensor protection shaft is of an axial structure with a hollow inside, the high-precision distance measuring sensor is fixedly arranged in an inner cavity of the sensor protection shaft along an axial direction, a measuring head faces to the lower end of the sensor protection shaft, the guide shaft sleeve is coaxially arranged at the lower part of the inner cavity of the sensor protection shaft, the lower end face of the guide shaft sleeve is flush or basically flush with the lower end face of the sensor protection shaft, the transition block is axially slidably sleeved in the guide shaft sleeve, the lower end faces of the transition block extend out of the guide shaft sleeve and the lower end face of the sensor protection shaft, and a preset gap is reserved between the upper end face of the transition block and the measuring head. The sliding transition block replaces the sensor probe to directly contact the measured surface, so that pollutants such as greasy dirt, dust and the like are effectively isolated, and the cleaning and measuring precision of the probe are maintained.

Inventors

  • ZENG JUN
  • WANG CUNLIANG
  • ZHENG LIQIANG
  • ZHANG MINGYUAN

Assignees

  • 天津福臻工业装备有限公司

Dates

Publication Date
20260512
Application Date
20260112

Claims (7)

  1. 1. The high-precision sensor detection mechanism is characterized by comprising a sensor protection shaft (1), a high-precision ranging sensor (2), a guide shaft sleeve (5) and a transition block (6); The sensor protection shaft (1) is of a hollow shaft-like structure; the high-precision distance measuring sensor (2) is fixedly arranged in the inner cavity of the sensor protection shaft (1) along the axial direction, and the measuring head (2.1) faces the lower end of the sensor protection shaft (1); The guide shaft sleeve (5) is coaxially arranged at the lower part of the inner cavity of the sensor protection shaft (1), and the lower end surface of the guide shaft sleeve is flush or basically flush with the lower end surface of the sensor protection shaft (1); The transition block (6) is sleeved in the guide shaft sleeve (5) in an axially sliding manner, the lower end face of the transition block extends out of the guide shaft sleeve (5) and the lower end face of the sensor protection shaft (1), and a preset gap is reserved between the upper end face of the transition block and the measuring head (2.1).
  2. 2. The high-precision sensor detection mechanism according to claim 1, further comprising a steel back lining (3), wherein the steel back lining (3) is fixedly arranged on the upper portion of an inner cavity of the sensor protection shaft (1), and the high-precision distance measuring sensor (2) is arranged in the steel back lining (3) in a penetrating mode.
  3. 3. The high-precision sensor detection mechanism according to claim 2, further comprising a first jackscrew (4.1), wherein a first threaded hole is formed in the side wall of the sensor protection shaft (1), and the first jackscrew (4.1) is screwed into the first threaded hole and abuts against the high-precision ranging sensor (2) so as to axially fix the high-precision ranging sensor.
  4. 4. The high-precision sensor detection mechanism according to claim 1, further comprising a second jackscrew (4.2), wherein a second threaded hole is formed in the side wall of the sensor protection shaft (1), and the second jackscrew (4.2) is screwed into the second threaded hole and abuts against the guide shaft sleeve (5) to fix the second jackscrew.
  5. 5. The high-precision sensor detection mechanism according to claim 1, wherein the guide bush (5) has a self-lubricating function.
  6. 6. The high-precision sensor detection mechanism according to claim 1, wherein the transition block (6) is of a stepped shaft structure with a large diameter at the upper end and a small diameter at the lower end, and the larger end of the shaft diameter is positioned in the guide shaft sleeve (5).
  7. 7. The high-precision sensor detection mechanism according to any one of claims 1 to 6, characterized in that when the lower end face of the transition block (6) is flush with the lower end face of the sensor protection shaft (1), the upper end face of the transition block (6) is within the effective measurement range of the high-precision ranging sensor (2).

Description

High-precision sensor detection mechanism Technical Field The invention belongs to the field of industrial automatic detection, and particularly relates to a high-precision sensor detection mechanism. Background In the field of industrial automation detection, high-precision distance measuring sensors (such as laser distance measuring sensors, contact displacement sensors and the like) are widely applied to key procedures of workpiece size measurement, position positioning, surface morphology detection and the like. Such sensors typically have measurement accuracy on the order of micrometers or even sub-micrometers, but their stylus often needs to be in direct contact with or in close proximity to the surface of the workpiece being measured to ensure accuracy and reliability of the measurement data. However, in practical industrial environments, particularly in machining, assembly, stamping, welding, etc., contaminants such as oil stains, cutting fluids, metal chips, dust, etc., often adhere to the surface of the workpiece. If the sensor probe is in direct contact with the surface for a long time, the adhesion and accumulation of pollutants are easy to cause, so that the measurement error is increased, the response speed is reduced, even the optical window or the sensitive element of the sensor is stained, and the service life and the measurement stability of the sensor are seriously affected. In addition, during the production process, the sensor probe is also easily subjected to accidental collision or extrusion due to mechanical vibration, workpiece positioning deviation or human operation errors, measurement deviation is caused by light weight, and deformation of the mechanical structure or damage of internal elements of the sensor is caused by heavy weight. The prior protection technology focuses on single function, is difficult to consider antifouling, anti-collision and overload protection under complex working conditions, is rarely in collaborative design with the range of the sensor, and can still cause the damage of the sensor due to the overscan when violent collision occurs. Therefore, there is a need for a sensor detection mechanism that is compact, does not affect measurement accuracy, and achieves comprehensive and reliable protection. Disclosure of Invention In order to solve the technical problems, the invention provides a high-precision sensor detection mechanism to solve the problems in the background technology. The invention discloses a high-precision sensor detection mechanism, which is characterized by comprising the following specific technical means: a high-precision sensor detection mechanism comprises a sensor protection shaft, a high-precision ranging sensor, a guide shaft sleeve and a transition block; the sensor protection shaft is of a shaft-shaped structure with a hollow inside; the high-precision ranging sensor is fixedly arranged in the inner cavity of the sensor protection shaft along the axial direction, and the measuring head of the high-precision ranging sensor faces the lower end of the sensor protection shaft; the guide shaft sleeve is coaxially arranged at the lower part of the inner cavity of the sensor protection shaft, and the lower end face of the guide shaft sleeve is flush or basically flush with the lower end face of the sensor protection shaft; the transition block is axially slidably sleeved in the guide shaft sleeve, the lower end face of the transition block extends out of the guide shaft sleeve and the lower end face of the sensor protection shaft, and a preset gap is reserved between the upper end face of the transition block and the measuring head. Preferably, the sensor protection device further comprises a steel back lining, wherein the steel back lining is fixedly arranged on the upper part of an inner cavity of the sensor protection shaft, and the high-precision distance measuring sensor is arranged in the steel back lining in a penetrating mode. Preferably, the sensor protection device further comprises a first jackscrew, wherein a first threaded hole is formed in the side wall of the sensor protection shaft, and the first jackscrew is screwed into the first threaded hole and abuts against the high-precision distance measuring sensor so as to axially fix the high-precision distance measuring sensor. Preferably, the sensor protection shaft further comprises a second jackscrew, a second threaded hole is formed in the side wall of the sensor protection shaft, and the second jackscrew is screwed into the second threaded hole and abuts against the guide shaft sleeve to fix the sensor protection shaft. Preferably, the guide sleeve has a self-lubricating function. Preferably, the transition block has a stepped shaft structure with a large diameter at the upper end and a small diameter at the lower end, and the larger end of the shaft diameter is positioned in the guide shaft sleeve. Preferably, when the lower end face of the transition block is flush with