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CN-121995354-A - Corrosion-resistant ultrasonic sensor

CN121995354ACN 121995354 ACN121995354 ACN 121995354ACN-121995354-A

Abstract

The invention relates to the field of sensors, in particular to a corrosion-resistant ultrasonic sensor. The device comprises a circuit board, two transducers arranged on the circuit board, a shell, a bottom sealing cover for sealing an opening at the bottom of the shell, wherein the transducers are detachably connected with the shell, the bottom sealing cover is connected with the transducers through a connecting frame, and sealing treatment is carried out at the contact part of the bottom sealing cover and the shell and the part of the transducers penetrating through the shell, and the outer wall of the transducers, the outer wall of the shell and the bottom sealing cover are made of corrosion-resistant materials. In the invention, the exposed parts of the whole ultrasonic sensor are made of corrosion-resistant materials, the corrosion resistance is good, and the parts in installation contact are respectively sealed by the sealing ring a, the sealing ring b and the sealing ring c, so that the tightness is ensured, the liquid gas and liquid are prevented from entering the shell, and the corrosion-resistant effect is further ensured. The ultrasonic sensor body is directly improved, and other shells do not need to be sleeved outside, so that the miniaturization and the light-weight design of the ultrasonic sensor can be realized.

Inventors

  • LI DESHENG
  • LI QUNSHENG
  • LI JINRUI
  • JIANG WENYING

Assignees

  • 陕西诺德科技有限公司

Dates

Publication Date
20260508
Application Date
20260210

Claims (8)

  1. 1. The corrosion-resistant ultrasonic sensor comprises a circuit board (9) and two transducers (11) arranged on the circuit board (9), wherein the two transducers (11) are respectively a transmitting transducer and a receiving transducer, and the corrosion-resistant ultrasonic sensor is characterized by further comprising a shell (1) and a bottom sealing cover (3) for sealing an opening at the bottom of the shell, wherein two transducer perforation holes (7) for the transducers (11) to penetrate are formed in the top of the shell (1), the transducers (11) are detachably connected with the shell (1), the bottom sealing cover (3) is connected with the transducers (11) through a connecting frame (16), sealing treatment is carried out at the contact position of the bottom sealing cover (3) and the shell (1) and at the position of the transducers (11) penetrating through the shell (1), and the outer wall of the transducers (11), the shell (1) and the bottom sealing cover (3) are made of corrosion-resistant materials.
  2. 2. The corrosion-resistant ultrasonic sensor according to claim 1, wherein four pins of the circuit board are integrated by a wire harness (10), the wire harness (10) is provided with a joint at a joint with an external controller, the wire harness (10) passes through the bottom cover (3), and a sealing treatment is performed at a place where the wire harness (10) passes through the bottom cover (3).
  3. 3. The corrosion-resistant ultrasonic sensor according to claim 1, wherein an inward-shrinking inner receiving section (2) is arranged at the bottom of the shell (1), the bottom sealing cover (3) is matched and sleeved on the inner receiving section (2), a sealing ring a (4) is arranged at the top of the inner receiving section (2), and the top of the bottom sealing cover (3) is in extrusion fit with the sealing ring a (4).
  4. 4. The corrosion-resistant ultrasonic sensor according to claim 1, wherein the mounting frames (5) are arranged on two sides of the bottom sealing cover (3), a plurality of mounting holes (6) are formed in the mounting frames (5), and the mounting frames (5) are made of corrosion-resistant materials.
  5. 5. The corrosion-resistant ultrasonic sensor according to claim 1, wherein a limiting ring (17) is arranged on the outer wall of the transducer (11), a sealing ring c (14) is arranged on the upper end face of the limiting ring (17), threads are arranged on the outer wall of the transducer (11) and are matched with a nut (15), and the sealing ring c (14) is in extrusion fit with the inner wall of the top of the shell (1).
  6. 6. The corrosion-resistant ultrasonic sensor according to claim 5, wherein two sealing rings b (8) are arranged on the outer side of the top of the shell (1), the sealing rings b (8) are positioned on the outer side of the transducer through hole (7), and the lower end face of the nut (15) is in extrusion fit with the sealing rings b (8).
  7. 7. The corrosion-resistant ultrasonic sensor according to claim 5, wherein both ends of the connecting frame (16) are respectively connected with the limiting ring (17) and the inner wall of the bottom sealing cover (3).
  8. 8. The corrosion-resistant ultrasonic sensor according to claim 1, wherein a plurality of guide holes are formed in the circuit board (9), a plurality of guide rods (13) are formed in the inner wall of the top of the housing (1), and the guide rods (13) are fitted through the guide holes.

Description

Corrosion-resistant ultrasonic sensor Technical Field The invention relates to the technical field of sensors, in particular to a corrosion-resistant ultrasonic sensor. Background The ultrasonic sensor is a simple and effective distance measuring tool, is widely applied to various scenes needing to sense the surrounding environment, and the working principle is based on the reflection characteristic of the sound wave, and can calculate the distance between the object and the sensor by measuring the time from the emission of the sound wave to the emission of the sound wave by the object. In some environments, the ultrasonic sensor needs to be resistant to liquid corrosion, and conventionally, some corrosion-resistant shells are sleeved on the ultrasonic sensor, so that the miniaturization and the light weight design of the ultrasonic sensor are not facilitated. Chinese patent with publication number CN213090789U discloses a corrosion-resistant ultrasonic sensor, the sensor main body is installed in the inner shell, the inner shell is used for protecting the sensor main body from being corroded by corrosive liquid, and the outer shell can further improve the corrosion-proof effect. However, the disclosed scheme has the defects that the ultrasonic sensor is externally covered with two layers of shells, and the ultrasonic sensor is not directly designed to resist corrosion, so that the miniaturization and the light weight of the ultrasonic sensor are not facilitated. Disclosure of Invention The invention aims at solving the problems that the corrosion resistance is realized by a sleeve shell mode in the background technology, and the miniaturization and the light weight design of an ultrasonic sensor are not facilitated, and provides a corrosion-resistant ultrasonic sensor. The technical scheme includes that the corrosion-resistant ultrasonic sensor comprises a circuit board, two transducers arranged on the circuit board, a shell and a bottom sealing cover for sealing an opening at the bottom of the shell, wherein two transducer through holes for the transducers to penetrate are formed in the top of the shell, the transducers are detachably connected with the shell, the bottom sealing cover is connected with the transducers through a connecting frame, sealing treatment is carried out on the contact parts of the bottom sealing cover and the shell and the parts of the transducers penetrating through the shell, and the outer wall of the transducer, the shell and the bottom sealing cover are made of corrosion-resistant materials. Preferably, the four pins of the circuit board are integrated through a wire harness, a joint is arranged at the joint of the wire harness and an external controller, the wire harness penetrates through the bottom sealing cover, and sealing treatment is carried out at the place where the wire harness penetrates through the bottom sealing cover. Preferably, the bottom of the shell is provided with an inward-shrinking section, the bottom sealing cover is matched and sleeved on the inward-shrinking section, the top of the inward-shrinking section is provided with a sealing ring a, and the top of the bottom sealing cover is in extrusion fit with the sealing ring a. Preferably, the bottom sealing cover bottom both sides all set up the mounting bracket, set up a plurality of mounting holes on the mounting bracket, and the mounting bracket material is corrosion-resistant material. Preferably, a limiting ring is arranged on the outer wall of the transducer, a sealing ring c is arranged on the upper end face of the limiting ring, threads are arranged on the outer wall of the transducer and are matched with nuts, and the sealing ring c is extruded and attached to the inner wall of the top of the shell. Preferably, two sealing rings b are arranged on the outer side of the top of the shell, the sealing rings b are positioned on the outer side of the perforation of the transducer, and the lower end face of the nut is extruded and attached with the sealing rings b. Preferably, two ends of the connecting frame are respectively connected with the limiting rings and the inner wall of the bottom sealing cover. Preferably, a plurality of guide holes are formed in the circuit board, a plurality of guide rods are arranged on the inner wall of the top of the shell, and the guide rods pass through the guide holes in a matched mode. Compared with the prior art, the ultrasonic sensor has the beneficial effects that the exposed parts of the whole ultrasonic sensor are made of corrosion-resistant materials, the corrosion resistance is good, the parts in installation contact are respectively sealed by the sealing ring a, the sealing ring b and the sealing ring c, the tightness is ensured, the liquid gas and liquid are prevented from entering the shell, and the corrosion-resistant effect is further ensured. The ultrasonic sensor body is directly improved, and other shells do not need to be sleeved outside, so that the