CN-121977673-A - Deep sea compensator non-contact detection system and method based on short wave infrared

CN121977673ACN 121977673 ACN121977673 ACN 121977673ACN-121977673-A

Abstract

The invention relates to the technical field of deep sea detection technology and liquid level measurement, in particular to a short wave infrared-based non-contact detection system and a short wave infrared-based non-contact detection method for a deep sea compensator, wherein the system is used for detecting the liquid level in the deep sea compensator and comprises a shell, a liquid filling cavity arranged in the shell, an infrared detection mechanism and a signal processing and control unit which are hermetically arranged on the outer side wall surface of the shell, and a sensor mechanism arranged outside the shell; the infrared detection mechanism comprises an infrared emission unit and an infrared detection unit which are arranged on the outer wall of the shell in a radial opposite mode, wherein the infrared emission unit is used for emitting infrared light to vertically scan the liquid filling cavity, the infrared detection unit is used for receiving the infrared light penetrating through the shell after scanning is completed to obtain detection signals, the sensor mechanism is used for monitoring environment parameters, compensating the detection signals and then transmitting the detection signals to the signal processing and control unit, and the signal processing and control unit analyzes the detection signal intensity mutation points to obtain the liquid level height.

Inventors

SUN MIAOJUN
Wu Youqian
LIU ZHENYA
RUAN HAILONG
LIU ZHIJIAN
ZHANG ZUGUO
LIU AN
YE XIAOPING
LIANG ZHENGFENG
ZHOU BOHAN
LU LINFENG
ZHUANG YINGCHUN
HUANG LIUSONG

Assignees

中国电建集团华东勘测设计研究院有限公司
北京探矿工程研究所

Dates

Publication Date: 20260505
Application Date: 20260407

Claims (10)

1. A short wave infrared-based non-contact detection system of a deep sea compensator is used for detecting the liquid level in the deep sea compensator and is characterized by comprising a shell, a liquid filling cavity, an infrared detection mechanism, a signal processing and control unit, a sensor mechanism and a control unit, wherein the liquid filling cavity is arranged in the shell, the infrared detection mechanism and the signal processing and control unit are arranged on the outer side wall surface of the shell in a sealing mode, the sensor mechanism is arranged outside the shell, and the infrared detection mechanism and the sensor mechanism are both in communication connection with the signal processing and control unit; The infrared detection mechanism comprises an infrared emission unit and an infrared detection unit which are arranged on the outer wall of the shell in a radial opposite mode, wherein the infrared emission unit is used for emitting infrared light to vertically scan the liquid filling cavity, and the infrared detection unit is used for receiving the infrared light penetrating through the shell after scanning is completed to obtain detection signals; The sensor mechanism is used for monitoring environmental parameters, compensating detection signals and transmitting the detection signals to the signal processing and control unit, and the signal processing and control unit analyzes the detection signal intensity mutation points to obtain the liquid level height.
2. The deep sea compensator non-contact detection system based on short wave infrared according to claim 1, wherein the infrared emission unit and the infrared detection unit respectively comprise a plurality of probes which are axially arrayed, and the probes of the infrared emission unit and the probes of the infrared detection unit are arranged in a radial one-to-one correspondence manner to form a correlation layout.
3. The deep sea compensator non-contact detection system based on short wave infrared according to claim 2, wherein a baffle, a leather bag and a piston are axially arranged at the bottom of the liquid filling cavity in sequence, the leather bag is extruded to drive the baffle to move towards the liquid filling cavity in the moving process of the piston, shielding is formed for the infrared emission unit, and the infrared detection unit obtains a corresponding detection signal through the triggered probe.
4. The deep sea compensator non-contact detection system based on short wave infrared according to claim 1, wherein the sensor mechanism comprises a temperature sensor and a pressure sensor, the environmental parameters are collected, and the signal processing and control unit adopts the environmental parameters to perform temperature drift and pressure refractive index compensation on the detection signals.
5. A deep sea compensator non-contact detection system based on short wave infrared according to claim 3, wherein the band range of the infrared light emitted by the infrared emission unit is And/or 。
6. The short wave infrared-based deep sea compensator non-contact detection system according to claim 1, wherein an observation window is arranged on the shell corresponding to the liquid filling cavity.
7. The short wave infrared-based deep sea compensator non-contact detection system according to claim 1, wherein a fixing and calibrating structure is arranged on the shell corresponding to the infrared detection mechanism.
8. The deep sea compensator non-contact detection method based on short wave infrared is characterized in that the deep sea compensator non-contact detection system based on short wave infrared is adopted to detect the liquid level of a liquid filling cavity, and the method comprises the following steps: Determining an ideal state based on the deep sea compensator, and establishing a reference signal library for a deep sea compensator non-contact detection system based on short wave infrared under the ideal state to obtain system calibration data; operating a deep sea compensator non-contact detection system based on short wave infrared in a deep sea working environment to obtain a detection signal, and obtaining real-time temperature and pressure compensation according to a sensor mechanism and transmitting the detection signal to a signal processing and control unit; The signal processing and control unit analyzes the detected signal intensity profile along the height direction of the shell, searches for a steep edge, combines system calibration data and real-time temperature and pressure compensation, determines the liquid level in the liquid filling cavity, and performs early warning according to the liquid level.
9. The method for non-contact detection of a deep sea compensator based on short wave infrared according to claim 8, wherein the signal processing and control unit analyzes the detected signal intensity profile along the height direction of the housing, finds a steep edge, and determines the liquid level in the liquid filling cavity by combining system calibration data and real-time temperature and pressure compensation, comprising: The signal processing and control unit searches for a steep change edge of the signal intensity in the detection signal, and combines the system calibration data to obtain a corresponding liquid level height, so as to obtain the liquid volume in the liquid filling cavity; The signal processing and controlling unit obtains temperature and pressure respectively based on the sensor mechanism and determines the current total liquid volume of the deep sea compensator; and (3) carrying out compensation correction by combining the current total liquid volume of the deep sea compensator and the liquid volume in the liquid filling cavity, and determining the liquid level in the liquid filling cavity.
10. The method for non-contact detection of the deep sea compensator based on the short wave infrared according to claim 8, wherein the pre-warning is performed according to the liquid level, specifically: The liquid level height is converted into a standard signal through the signal processing and control unit, a judgment threshold value is preset, the standard signal output and the judgment threshold value are compared, and a low-level alarm signal or an abnormal rapid descending alarm signal is output.

Description

Deep sea compensator non-contact detection system and method based on short wave infrared Technical Field The invention relates to the technical field of deep sea detection technology and liquid level measurement, in particular to a deep sea compensator non-contact detection system and method based on short wave infrared. Background Deep sea equipment such as deep sea robots, seafloor observation stations, christmas trees, etc. often use external hydraulic compensators to balance internal pressure with external sea water pressure to prevent seal failure. The compensator is usually filled with hydraulic oil, and the oil level height of the compensator directly reflects the internal pressure compensation state and the oil consumption condition, and is a key parameter for evaluating the health and the sealing integrity of the system. At present, the oil level measurement of the compensator mainly faces the technical bottlenecks of pressure resistance and sealing difficulty, the deep sea environment can reach tens of megapascals, a high-pressure environment is formed by the compensator, any capacitive, float-type, magnetostrictive and other contact sensors which are installed on a compensator shell through holes can introduce potential leakage risks, the sealing structure of the compensator is extremely complex and low in reliability, medium compatibility is poor, the sensors need to be directly contacted with hydraulic oil, corrosion, pollution or influence of dielectric constant change of oil products can occur to cause measurement misalignment, third, long-term stability is insufficient, the deep sea equipment is unattended for a long time, the sensors cannot be replaced once damaged, a monitoring system is required to have extremely high long-term stability and environmental tolerance, fourth, installation and maintenance are difficult, the traditional sensors need to be built in, the structural complexity and the manufacturing cost of the compensator are increased, and inspection or maintenance cannot be carried out after equipment is in service. Disclosure of Invention In order to solve the technical problems of poor medium compatibility, insufficient long-term stability and difficult installation and maintenance of the existing pressure resistance and sealing problems of the deep sea compensator installed on the deep sea equipment, the invention aims to provide a short wave infrared-based non-contact detection system of the deep sea compensator, which is used for detecting the liquid level height in the deep sea compensator, and the adopted technical scheme is as follows: The system comprises a shell, a liquid filling cavity, an infrared detection mechanism, a signal processing and control unit and a sensor mechanism, wherein the liquid filling cavity is arranged in the shell, the infrared detection mechanism and the signal processing and control unit are hermetically arranged on the outer side wall surface of the shell, and the sensor mechanism is arranged outside the shell and is in communication connection with the signal processing and control unit; The infrared detection mechanism comprises an infrared emission unit and an infrared detection unit which are arranged on the outer wall of the shell in a radial opposite mode, wherein the infrared emission unit is used for emitting infrared light to vertically scan the liquid filling cavity, and the infrared detection unit is used for receiving the infrared light penetrating through the shell after scanning is completed to obtain detection signals; The sensor mechanism is used for monitoring environmental parameters, compensating detection signals and transmitting the detection signals to the signal processing and control unit, and the signal processing and control unit analyzes the detection signal intensity mutation points to obtain the liquid level height. Preferably, the infrared emission unit and the infrared detection unit respectively comprise a plurality of probes which are axially arrayed, and the probes of the infrared emission unit and the probes of the infrared detection unit are radially arranged in one-to-one correspondence to form a correlation layout. Preferably, a baffle, a leather bag and a piston are axially arranged at the bottom of the cavity close to the liquid filling cavity in sequence, the leather bag is extruded in the moving process of the piston to drive the baffle to move towards the liquid filling cavity, shielding is formed for the infrared emission unit, and the infrared detection unit obtains a corresponding detection signal through the triggered probe. Preferably, the sensor mechanism comprises a temperature sensor and a pressure sensor, the environmental parameters are collected, and the signal processing and control unit adopts the environmental parameters to carry out temperature drift and pressure refractive index compensation on the detection signals. Preferably, the infrared emission unit emits infrared light in th