阅读说明：本技术 一种压电驱动局部单点推扫的水质状态探测装置及其推扫方法 (Piezoelectric-driven local single-point push-sweeping water quality state detection device and push-sweeping method thereof ) 是由 张霖 郑显华 姚正华 何仁琪 黄江波 于 2020-05-26 设计创作，主要内容包括：本发明公开了一种压电驱动局部单点推扫的水质状态探测装置及其推扫方法,包括设置在水面运载平台上的多轴旋转支架,其还包括压电陶瓷驱动阵列及光学单点探测器,所述压电陶瓷驱动阵列由若干中心对称布置的压电陶瓷驱动器垂直阵列而成,并形成于机械外壳内,所述光学单点探测器与压电陶瓷驱动阵列之间通过承压板连接；所述承压板与光学单点探测器固定连接,与压电陶瓷驱动阵列的机械外壳柔性连接,且压电陶瓷驱动阵列的机械外壳固定在多轴旋转支架上。其既实现了水质状态局部单点检测,又通过数据采集存储后进行集中处理,对水面漂浮物与近岸水域暗礁的检测与识别,避免了水质检测装置在自主移动时触礁,防止了安全事故发生。(The invention discloses a piezoelectric-driven local single-point push-sweeping water quality state detection device and a push-sweeping method thereof, wherein the device comprises a multi-axis rotating support arranged on a water surface carrying platform, a piezoelectric ceramic driving array and an optical single-point detector, wherein the piezoelectric ceramic driving array is formed by vertically arraying a plurality of piezoelectric ceramic drivers which are arranged in a central symmetry manner and is formed in a mechanical shell, and the optical single-point detector is connected with the piezoelectric ceramic driving array through a bearing plate; the pressure bearing plate is fixedly connected with the optical single-point detector and flexibly connected with a mechanical shell of the piezoelectric ceramic driving array, and the mechanical shell of the piezoelectric ceramic driving array is fixed on the multi-axis rotating support. The water quality detection device has the advantages that local single-point detection of the water quality state is realized, centralized processing is carried out after data acquisition and storage, detection and identification of water surface floaters and the reef in the coastal water area are realized, the water quality detection device is prevented from touching the reef when the water quality detection device moves independently, and safety accidents are prevented.)

1. A piezoelectric-driven local single-point push-sweeping water quality state detection device comprises a multi-axis rotating support (2) arranged on a water surface carrying platform (1), and is characterized by further comprising a piezoelectric ceramic driving array (3) and an optical single-point detector (4), wherein the piezoelectric ceramic driving array (3) is formed by vertically arraying a plurality of piezoelectric ceramic drivers (5) which are arranged in a central symmetry manner and is formed in a mechanical shell (6), and the optical single-point detector (4) is connected with the piezoelectric ceramic driving array (3) through a bearing plate (7); the pressure bearing plate (7) is fixedly connected with the optical single-point detector (4) and flexibly connected with a mechanical shell (6) of the piezoelectric ceramic driving array (3), and the mechanical shell (6) of the piezoelectric ceramic driving array (3) is fixed on the multi-axis rotating support (2).

2. The piezoelectric driving local single-point push-broom water quality state detection device according to claim 1, wherein the optical single-point detector (4) comprises a master control MCU (8), an MEMS spectrum detection chip (9) and an optical lens (10), the master control MCU (8) is electrically connected with the MEMS spectrum detection chip (9) through an SPI bus, and the output end of the MEMS spectrum detection chip (9) is connected with the optical lens (10); and the master control MCU (8) is connected with the piezoelectric ceramic drive array (3).

3. The piezoelectric driving local single-point push-broom water quality state detection device according to claim 1 or 2, characterized in that the multi-axis rotating support (2) is installed on the top of the water surface carrying platform (1), and the front end of the multi-axis rotating support is not blocked.

4. The piezoelectrically driven local single-point push-broom water quality status detection device according to claim 2, wherein the optical single-point detector (4) is used for single-point monitoring of water quality status.

5. The piezoelectric driving local single-point push-broom water quality state detection device according to claim 4, wherein the piezoelectric ceramic driving array (3) drives the MEMS spectrum detection chip (9) to move locally at a single point, so that water quality state parameters are monitored, and all near-earth spectrum information is acquired by combining the forward and backward movement of the water surface carrying platform (1).

6. The piezoelectric driving local single-point push-broom water quality state detection device according to claim 5, wherein the main control MCU (8) is used for classifying and identifying submerged reefs and garbage on the water surface by a deep learning method.

7. The piezoelectric driving local single-point push-broom water quality state detection device according to claim 1, characterized in that the mechanical housing (6) and the pressure bearing plate (7) are mechanically fixed by a mechanical fastening device (11).

8. A push-broom method based on the device of claim 1, comprising the steps of:

(1) fixing the piezoelectric ceramic driving array and the optical single-point detector on a water surface carrying platform through a multi-axis rotating support;

(2) when the water surface is not fluctuated, the main control MCU detects a piezoelectric transition curve model output by the piezoelectric ceramic driving array, and is used for subsequent synchronous correction and correlation, and simultaneously corrects the optical parameters of the optical lens to obtain correction parameters including the focal length f;

(3) the master control MCU is used for sending pulse control signals to control the piezoelectric ceramic driving array to move according to a specific piezoelectric push-broom curve, so that the optical single-point detector periodically reciprocates on an expected piezoelectric push-broom curve;

(4) the master control MCU sends acquisition signals at the extreme points and zero points of the piezoelectric push-broom curve according to the sent pulse control signals, so that the generated specific acquisition time sequence is sent to the MEMS spectrum detection chip, and the MEMS spectrum detection chip returns the water quality spectrum detection data at the corresponding time in real time;

(5) according to the principle of optical depth detection, the amplitude of the push-broom motion generated by the piezoelectric ceramic driving array and the amplitude of the water surface push-broom at the specific intersection point of the spectrum line beam and the water surface are (_h+_l) Correspondingly, the water quality state parameters of the current point can be sensed through the spectrum single-point detector under the condition of a given depth or through laser sensing;

(6) circulating the steps (3) - (5), continuously scanning the water surface, concentrating all scanned points and expanding the points in a time domain to form a water surface push-scanning curve, and further acquiring water quality state parameters in a tiny strip-shaped area;

(7) carrying out movement in a specific state through the water surface carrying platform, and combining the water quality parameters of the strip-shaped area obtained in the step (6), so as to obtain water quality state parameters in the whole plane;

(8) acquiring water quality state parameters of a certain part of planes at specific time intervals by using the master control MCU, and if the water quality state parameters in a certain area are within a normal range, detecting the water quality state again by using the spectrum single-point detector; if the water quality state parameters in a certain area exceed the range of the normal water quality parameter area, the characters of the current area can be classified and identified by a deep learning method, and foreign matters including water surface submerged reefs and garbage floaters can be identified;

(9) the steps are repeated to realize spectrum single-point detection of the water quality state, and detection of submerged reefs and garbage floaters on the water surface can be realized.

9. The push-broom method of claim 8, wherein in step (3), the master MCU is utilized to transmit a pulse control signal to control the piezoceramic driver array to move according to a sinusoidal push-broom curve with a fixed amplitude and frequency.

10. The push-broom method of claim 8,in step (8), the specified time is ≦ (fmax 2)^-1Where fmax is the maximum frequency of the sinusoidal push-scan curve.

Technical Field

The invention relates to a water quality state detection device and a method thereof, in particular to a piezoelectric-driven local single-point push-sweeping water quality state detection device and a push-sweeping method thereof, and belongs to the technical field of state monitoring of special intelligent equipment.

Background

At present, the water quality monitoring device is widely applied to the aspects of hydrological environment, agriculture, fishery, quality inspection monitoring and the like, and is main equipment for detecting the water quality state. The sensors for monitoring water quality are also of various types, common water quality sensors comprise an ORP sensor, a turbidity sensor, a PH sensor, a conductivity sensor, a residual chlorine sensor and the like, the water quality detection requirements of different industries are also different, and water quality parameters to be detected are also different, so that different sensors are also required to be equipped.

The problems that arise in this way are: the configuration work of the detection equipment is complicated, extra communication/power supply communication and interfaces are required to be configured or carried, and multivariate water quality state monitoring of single equipment is difficult to realize. In addition, the conventional water quality sensor is used for detecting the water quality of an open water area, a ship is needed or a specific water area observation station is built, and heavy equipment design and manufacturing processes are needed; meanwhile, the equipment is messy, so that certain difficulty is added to the miniaturization of the integrated system.

Disclosure of Invention

The invention aims to provide a piezoelectric-driven local single-point push-sweeping water quality state detection device and a push-sweeping method thereof, which not only can realize local single-point monitoring of a water quality state, but also can carry out centralized processing after data acquisition and storage; meanwhile, the water surface floating objects and the submerged reefs in the coastal water areas can be monitored and identified, the water quality detection device is prevented from touching the reefs when the water quality detection device autonomously moves, and safety accidents are prevented.

In order to achieve the purpose, the technical scheme adopted by the invention is that the piezoelectric driving local single-point push-sweeping water quality state detection device comprises a multi-axis rotating support arranged on a water surface carrying platform, a piezoelectric ceramic driving array and an optical single-point detector, wherein the piezoelectric ceramic driving array is formed by vertically arraying a plurality of piezoelectric ceramic drivers which are arranged in a central symmetry manner and is formed in a mechanical shell, and the optical single-point detector is connected with the piezoelectric ceramic driving array through a bearing plate; the pressure bearing plate is fixedly connected with the optical single-point detector and flexibly connected with a mechanical shell of the piezoelectric ceramic driving array, and the mechanical shell of the piezoelectric ceramic driving array is fixed on the multi-axis rotating support.

The multi-axis rotating bracket is used for mechanical installation and firmness of the device, and can realize mechanical anti-shake of optical detection under the condition of complex water surface fluctuation; the multi-axis rotating support is installed on the water surface carrying platform and connected with a mechanical shell of the piezoelectric ceramic driving array.

The piezoelectric ceramic driving array is used for accurately controlling the high-frequency push-broom motion of the optical single-point detector, each ceramic driver controls electronic control to realize synchronization of the high-frequency push-broom motion, the piezoelectric ceramic driving array interacts with the bearing plate, and the bearing plate is in mechanical firm connection with the optical single-point detector.

The optical single-point detector is used for single-point detection of water quality states and mainly comprises a master control MCU, an MEMS spectrum detection chip, a matched optical lens and the like. The master control MCU mainly carries out MEMS spectrum detection data timing acquisition and optical single-point analysis of the water quality state; the MEMS spectrum detection chip is used for detecting a specific spectrum, and the optical lens is matched with the MEMS spectrum detection chip to perform spectrum detection.

The master control MCU is connected with the MEMS spectrum detection chip through the SPI bus, and the MEMS spectrum detection chip is connected with the optical lens. Meanwhile, the master control MCU is also connected with the piezoelectric ceramic drive array and used for synchronously acquiring the push-broom motion curve driven by the piezoelectric ceramic and the corresponding spectrum information.

Preferably, the mechanical housing and the pressure bearing plate are mechanically fixed by a mechanical fastening device, and the mechanical fastening device includes a screw, a bolt, a stud or a screw.

Meanwhile, the invention also provides a push-sweeping method based on the device, which comprises the following steps:

(1) fixing the piezoelectric ceramic driving array and the optical single-point detector on a water surface carrying platform through a multi-axis rotating support;

(2) when the water surface is not fluctuated, detecting a piezoelectric transition curve model output by the piezoelectric ceramic driving array, and using the piezoelectric transition curve model for subsequent synchronous correction and correlation, and correcting the optical parameters of the optical lens to obtain correction parameters including a focal length f;

(3) the master control MCU is used for sending pulse control signals to control the piezoelectric ceramic driving array to move according to a specific piezoelectric push-broom curve, so that the optical single-point detector periodically reciprocates on an expected piezoelectric push-broom curve;

(4) the master control MCU sends acquisition signals at the extreme points and zero points of the piezoelectric push-broom curve according to the sent pulse control signals, so that the generated specific acquisition time sequence is sent to the MEMS spectrum detection chip, and the MEMS spectrum detection chip returns the water quality spectrum detection data at the corresponding time in real time;

(5) according to the principle of optical depth detection, the amplitude of the push-broom motion generated by the piezoelectric ceramic driving array and the amplitude of the water surface push-broom at the specific intersection point of the spectrum line beam and the water surface are (_h+_l) Correspondingly, the water quality state parameters of the current point can be sensed through the spectrum single-point detector under the condition of a given depth or through laser sensing;

(6) circulating the steps (3) - (5), continuously scanning the water surface, concentrating all scanned points and expanding the points in a time domain to form a water surface push-scanning curve, and further acquiring water quality state parameters in a tiny strip-shaped area;

(7) carrying out movement in a specific state through the water surface carrying platform, and combining the water quality parameters of the strip-shaped area obtained in the step (6), so as to obtain water quality state parameters in the whole plane;

(8) acquiring water quality state parameters of a certain part of planes at specific time intervals by using the master control MCU, and if the water quality state parameters in a certain area are within a normal range, detecting the water quality state again by using the spectrum single-point detector; if the water quality state parameters in a certain area exceed the range of the normal water quality parameter area, the characters of the current area can be classified and identified by a deep learning method, and foreign matters including water surface submerged reefs and garbage floaters can be identified;

(9) the steps are repeated to realize the spectrum single-point detection of the water quality state, and the detection of foreign matters such as water surface submerged reefs and garbage floaters can be realized.

Preferably, in the step (3), the main control MCU is used to transmit a pulse control signal to control the piezoelectric ceramic driving array to move according to a sinusoidal push-broom curve with fixed amplitude and frequency.

Preferably, in step (8), said specific time is ≦ (fmax 2)^-1Where fmax is the maximum frequency of the sinusoidal push-scan curve. Meanwhile, in this step, the water quality parameters that are frequently measured include: turbidity, pH, COD/BOD/TOC, etc.

The invention has the beneficial effects that: the invention accurately controls the single-point push-broom motion of the optical single-point detector through the piezoelectric ceramic driving array, so that the push-broom frequency is higher, and the push-broom amplitude reaches the micron order. In order to enable the spectrum to detect the water quality state parameters of a certain specific water surface area, the single-point detection of the water quality state can be realized only by the MEMS spectrum detector with extremely low cost, the detection of foreign matters such as water surface submerged reefs and garbage floats can be further realized by combining the motion of the water surface carrying platform, the water surface carrying platform is prevented from touching reefs when the water surface carrying platform moves autonomously, and safety accidents are prevented.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description of the embodiment or the prior art will be briefly described below.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the mounting structure of the present invention;

FIG. 3 is a schematic diagram of a piezo-electrically driven push-broom of local single-point spectra in accordance with the present invention;

in the figure: 1. the system comprises a water surface carrying platform, 2 a multi-axis rotating support, 3 a piezoelectric ceramic driving array, 4 an optical single-point detector, 5 a piezoelectric ceramic driver, 6 a mechanical shell, 7 a bearing plate, 8 a main control MCU, 9 an MEMS spectrum detection chip, 10 an optical lens and 11 a mechanical fastening device.

Detailed Description

In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the present application will be clearly and completely described below with reference to the embodiments.

As shown in fig. 1, a piezoelectric-driven local single-point push-sweeping water quality state detection device is disclosed, which comprises a multi-axis rotating support 2 arranged on a water surface carrying platform 1, a piezoelectric ceramic driving array 3 and an optical single-point detector 4, wherein the piezoelectric ceramic driving array 3 is formed by vertically arraying a plurality of piezoelectric ceramic drivers 5 which are arranged in central symmetry and is formed in a mechanical shell 6, and the optical single-point detector 4 is connected with the piezoelectric ceramic driving array 3 through a bearing plate 7; the pressure bearing plate 7 is fixedly connected with the optical single-point detector 4 and flexibly connected with the mechanical shell 6 of the piezoelectric ceramic driving array 3, and the mechanical shell 6 of the piezoelectric ceramic driving array 3 is fixed on the multi-axis rotating support 2.

The optical single-point detector 4 comprises a master control MCU8, an MEMS spectrum detection chip 9 and an optical lens 10, wherein the master control MCU8 is electrically connected with the MEMS spectrum detection chip 9 through an SPI bus, and the output end of the MEMS spectrum detection chip 9 is connected with the optical lens 10; the master control MCU8 is connected with the piezoelectric ceramic drive array 3.

In this patent, the optical single-point detector captures electromagnetic information of different wavelengths emitted by the object itself through the photosensitive device, and the optical lens 10 is used to concentrate a wider range of spectral information onto this optical device.

The multi-axis rotating support 2 is arranged at the top of the water surface carrying platform 1, the front end of the multi-axis rotating support is not shielded, and if the front end of the multi-axis rotating support is shielded, the spectrum collection of the optical single-point detector can be influenced.

The optical single-point detector 4 is used for carrying out single-point monitoring on the water quality state.

The piezoelectric ceramic driving array 3 drives the MEMS spectrum detection chip 9 to locally push a single point, so that the water quality state parameters are monitored, and all near-earth spectrum information is acquired by combining the forward and backward movement of the water surface carrying platform 1.

The main control MCU8 classifies and identifies foreign matters such as water surface submerged reefs and garbage through a deep learning method, so that the water quality detection device can be effectively prevented from touching reefs during autonomous movement, and safety accidents are prevented.

The mechanical housing 6 and the bearing plate 7 are mechanically fixed by a mechanical fastening device 11, which includes a screw, a bolt, a stud or a screw.

The invention also provides a push-sweeping method based on the device, which comprises the following steps:

(1) fixing the piezoelectric ceramic driving array and the optical single-point detector on a water surface carrying platform through a multi-axis rotating support;

(2) when the water surface is not fluctuated, the main control MCU detects a piezoelectric transition curve model output by the piezoelectric ceramic driving array, and is used for subsequent synchronous correction and correlation, and simultaneously corrects the optical parameters of the optical lens to obtain correction parameters including the focal length f;

(3) the master control MCU is used for sending pulse control signals to control the piezoelectric ceramic driving array to move according to a specific piezoelectric push-broom curve, so that the optical single-point detector periodically reciprocates on an expected piezoelectric push-broom curve;

in this step, the specific piezoelectric push-broom curve refers to that the master control MCU is used to send a pulse control signal to control the piezoelectric ceramic driving array to move according to a sinusoidal push-broom curve with fixed amplitude and frequency;

(4) the master control MCU sends acquisition signals at the extreme points and zero points of the piezoelectric push-broom curve according to the sent pulse control signals, so that the generated specific acquisition time sequence is sent to the MEMS spectrum detection chip, and the MEMS spectrum detection chip returns the water quality spectrum detection data at the corresponding time in real time;

(5) according to the principle of optical depth detection, the amplitude of the push-broom motion generated by the piezoelectric ceramic driving array is pushed to the water surface at the specific intersection point of the spectrum line beam and the water surfaceSweep amplitude value (_h+_l) Correspondingly, the water quality state parameters of the current point can be sensed through the spectrum single-point detector under the condition of a given depth or through laser sensing;

(6) circulating the steps (3) - (5), continuously scanning the water surface, concentrating all scanned points and expanding the points in a time domain to form a water surface push-scanning curve, and further acquiring water quality state parameters in a tiny strip-shaped area;

(7) carrying out movement in a specific state through the water surface carrying platform, and combining the water quality parameters of the strip-shaped area obtained in the step (6), so as to obtain water quality state parameters in the whole plane;

(8) acquiring water quality state parameters of a certain part of planes at specific time intervals by using the master control MCU, and if the water quality state parameters in a certain area are within a normal range, detecting the water quality state again by using the spectrum single-point detector; if the water quality state parameters in a certain area exceed the range of the normal water quality parameter area, the characters of the current area can be classified and identified by a deep learning method, and foreign matters including water surface submerged reefs and garbage floaters can be identified;

in this step, the specified time is ≦ (fmax 2)^-1Wherein fmax is the maximum frequency of the sinusoidal push-broom curve;

the water quality parameters that this water quality status detection device can detect include: turbidity, pH, COD/BOD/TOC, etc.

(9) The steps are repeated to realize spectrum single-point detection of the water quality state, and detection of submerged reefs and garbage floaters on the water surface can be realized.

The invention accurately controls the single-point push-broom motion of the optical single-point detector through the piezoelectric ceramic driving array, so that the push-broom frequency is higher, and the push-broom amplitude reaches the micron order. In order to enable the spectrum to detect the water quality state parameters of a certain specific water surface area, the single-point detection of the water quality state can be realized only by the MEMS spectrum detector with extremely low cost, the detection of foreign matters such as water surface submerged reefs and garbage floats can be further realized by combining the motion of the water surface carrying platform, the water surface carrying platform is prevented from touching reefs when the water surface carrying platform moves autonomously, and safety accidents are prevented.

The described embodiments are only some embodiments of the invention, not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.