High-precision water body euphotic layer depth measuring device

Abstract

The utility model discloses a high-precision water body euphotic layer depth measuring device which comprises a telescopic rod, a multichannel data recorder, a counter, a rope winding disc and a cable rope, the handle end of the telescopic rod is provided with the multichannel data recorder, the counter and the rope winding disc, and the tail end of the output end of the telescopic rod is provided with a fixed pulley module. The multi-channel data recorder is connected with the underwater light quantum measurement module through the cable rope, the cable rope sequentially passes through the rope winding disc, the counter and the fixed pulley module, underwater light quantum measurement is facilitated, detection can be conducted at any position, and meanwhile the water depth of the detection end is measured.

Description

TECHNICAL FIELD

[0001] The utility model relates to water environment monitoring technical field, concretely is a kind of high-precision water body euphotic zone depth measuring device. BACKGROUND

[0002] Euphotic zone is the main place of photosynthesis in lake and reservoir ecosystem, and is also the key area of physical and biogeochemical processes. Euphotic zone depth is one of the important factors for measuring the overall condition of lake and reservoir ecological environment, which directly affects the distribution of phytoplankton in water body and water ecological environment. Generally, it is defined as the depth at which the light intensity decreases to 1% of the light intensity at the water surface. High-precision measurement of euphotic zone depth helps to reflect the primary productivity, biomass and water quality of lake and reservoir, and has important guiding significance for analyzing the role of lake and reservoir in global carbon cycle, carbon storage estimation, primary productivity research, ecological system health evaluation and water quality safety protection.

[0003] At present, the widely used method for monitoring the euphotic zone of water body in China is that the operator reaches the specified monitoring sample point by boat and uses a quantum photometer to measure. The operator puts the underwater sensor along the edge of the monitoring boat according to the depth rule with one hand, and records the value at each depth with the other hand through the reader. This method is difficult for single operation, time-consuming, and is easily affected by factors such as instantaneous change of light intensity, shadow of monitoring boat and rope, equipment tilt, etc., resulting in large error in measured light intensity data. In addition, it is also difficult to accurately determine the actual depth of the probe under water only by rope marking. There are also methods that use remote sensing to establish a model for deduction and estimation, but the accuracy often cannot meet the requirements.

[0004] The existing device for automatically measuring the depth of euphotic zone of water body with the authorization announcement number CN217110930U arranges light sensors on the underwater scale rope at fixed intervals, supplies power through the controller and collects measurement data, and uses the equipped light source to supplement light at night to realize automatic monitoring all day round. However, this method arranges multiple underwater light sensors at fixed intervals, which cannot optimize the interval arrangement according to different lake and reservoir environments, resulting in that the obtained euphotic zone depth is only an approximate value. At the same time, the existence of multiple probes may cause large shadow to the light on the water surface, although it ensures the continuity of data, but there is still room for improvement in terms of cost and accuracy. UTILITY MODEL CONTENTS

[0005] The utility model provides a kind of high-precision water body euphotic zone depth measuring device, can solve the problems such as shadow shielding of monitoring boat and the like on water surface, influence of underwater bubble on light, inability to determine the accurate depth of sensor probe, etc., and improve the measurement accuracy of euphotic zone depth of water body.

[0006] To solve the above technical problems, the technical scheme adopted by the utility model is:

[0007] A high-precision water body true light layer depth measuring device, comprising a telescopic rod, a multi-channel data recorder, a counter, a rope reel and a cable rope, the handle end of the telescopic rod is provided with a multi-channel data recorder, a counter and a rope reel, the output end of the telescopic rod is provided with a fixed pulley module, the multi-channel data recorder is connected with an underwater light quantum measuring module through the cable rope, and the cable rope sequentially passes through the rope reel, the counter and the fixed pulley module.

[0008] As preferred, the contraction of the cable rope is linked with the rotation of the rope reel, the counter is used for counting the cable rope winding and unwinding distance, and the cable rope is linked with the underwater light quantum measuring module through the fixed pulley module.

[0009] As more preferred, the underwater light quantum measuring module comprises a sinking frame, a mounting disc with concentric and coaxial mounting holes is arranged in the middle of the sinking frame, a multi-port hub is rigidly connected in the mounting holes in a concentric and coaxial mode, a plurality of legs are arranged on the outer side of the mounting disc around the middle shaft at equal intervals, the legs are all arranged in a radial direction, the underwater photosynthetically active radiation sensors are arranged at the ends of each leg, and the underwater photosynthetically active radiation sensors are all connected with the multi-port hub through corresponding cable ropes.

[0010] Further, a conical solid weight is arranged in a concentric and coaxial mode at the bottom of the multi-port hub, the conical solid weight penetrates the mounting disc, a cavity is arranged at the top of the multi-port hub, a multiplexer is arranged in the cavity, the signal output ends of the underwater photosynthetically active radiation sensors are all connected with the signal input end of the multi-port hub through corresponding cable ropes, and the signal output end of the multi-port hub is connected with the multi-channel data recorder through the cable rope on the telescopic rod.

[0011] Further, an underwater pressure sensor is arranged at the top of the multi-port hub, the sensing end of the underwater pressure sensor is located on the outer side of the multi-port hub, and the underwater pressure sensor is connected with the multiplexer through a corresponding cable rope.

[0012] Specifically, a cable fixing buckle is arranged in a concentric and coaxial mode at the top of the multi-port hub, and the cable rope on the telescopic rod is hung with the multi-port hub in an adjustable mode through the cable fixing buckle.

[0013] More specifically, the outer side of the sinking frame is provided with a black coating.

[0014] In detail, the number of the legs of the sinking frame is not less than three.

[0015] More specifically, the ends of the legs of the sinking frame are all in the shape of water droplets, one side of the water droplet part points to the outside, and a sensor mounting seat for installing the underwater photosynthetically active radiation sensor is arranged on the water droplet part.

[0016] As preferred, the counter comprises a guide wheel, the cable rope forms a guide fit with the guide wheel, the guide wheel is provided with an angle sensor on one side, and the rotation shaft of the guide wheel is synchronously rotated with the sensing end of the angle sensor, and the signal output end of the angle sensor is connected with the signal input end of the multi-channel data recorder.

[0017] The utility model discloses beneficial effect has:

[0018] 1, through the synchronous measurement of multiple equidistant distribution underwater photosynthetically active radiation sensor, can constitute a simple photosynthetically active radiation surface, using the difference of photosynthetically active radiation change at relative position, can calibrate the measurement deviation caused by various shadows on water surface;

[0019] 2, through underwater pressure sensor can obtain more accurate photosynthetically active radiation sensor depth information, and cooperate with the length measured below cable rope of counter can carry out depth comparison calibration, can avoid the influence of water surface reflection, human eye difference, equipment inclination and other factors on water body true light layer depth reading;

[0020] 3, through the specially made sinking frame, the influence of the field monitoring environment can be effectively reduced, and the inverted water droplet streamline support design can avoid a large number of bubbles around the sensor when the instrument is placed underwater, and the bubbles can refract and reflect part of the light entering the water body;The outer high light absorption black coating can ensure that the light loss is small when entering the water body;

[0021] 4, through the use of multiplexer, the data stream from underwater pressure sensor and all underwater photosynthetically active radiation sensors is merged into a single, and simultaneously output to the multi-channel data recorder, and synchronous data can be obtained for mutual calibration;

[0022] 5, through the telescopic rod integrated device, good portability, easy operation, can be directly measured by a sampling personnel on the river bank, and has the advantages of high measurement accuracy, low cost and environmental interference resistance. BRIEF DESCRIPTION OF DRAWINGS

[0023] Fig. 1 It is the high-precision water body true light layer depth measuring device structure schematic diagram of the utility model;

[0024] Fig. 2 It is the underwater measurement module structure schematic diagram in the utility model;

[0025] In the drawing: 1, underwater light quantum measurement module;11, multi-port concentrator box;12, sinking frame;13, underwater photosynthetically active radiation sensor;14, underwater pressure sensor;15, cable rope fixing buckle;16, multiplexer;

[0026] 2, multi-channel data recorder;3, counter;4, telescopic rod;5, cable reel;6, cable rope. DETAILED DESCRIPTION

[0027] The embodiments are further described below with reference to the accompanying drawings.

[0028] As Figs. 1-2 shown, as a preferred embodiment 1, a high-precision water body euphotic zone depth measuring device, comprising a telescopic rod 4, a multi-channel data logger 2, a counter 3, a rope reel 5 and a cable rope 6, the handle end of the telescopic rod 4 is provided with the multi-channel data logger 2, the counter 3 and the rope reel 5, the output end of the telescopic rod 4 is provided with a fixed pulley module, the multi-channel data logger 2 is connected with an underwater light quantum measuring module 1 through the cable rope 6, and the cable rope 6 sequentially passes through the rope reel 5, the counter 3 and the fixed pulley module.

[0029] The contraction of the cable rope 6 is linked with the rotation of the rope reel 5, the counter 3 is used for counting the cable rope 6 winding and unwinding distance, and the cable rope 6 forms a fixed pulley linkage with the underwater light quantum measuring module 1 through the fixed pulley module.

[0030] In use, the distance from the shore is adjusted through the telescopic rod 4, the underwater light quantum measuring module 1 is placed underwater along the cable rope 6 by rotating the rope reel 5, the length of the cable rope 6 unwound is inductively counted through the counter 3, the cable rope 6 is unwound to a set depth, the underwater photosynthetically active radiation data is inductively measured through the underwater light quantum measuring module 1, and when the underwater light quantum measuring module 1 touches the bottom, the length displayed by the counter 3 can be used as the water depth at this point.

[0031] As a preferred embodiment 2, the underwater light quantum measuring module 1 comprises a sinking frame 12, the middle of the sinking frame 12 is provided with a mounting disc with a mounting hole with concentricity and coaxiality, a multi-port hub 11 is rigidly connected in the mounting hole with concentricity and coaxiality, a plurality of legs are equidistantly arranged on the outer side of the mounting disc around the middle shaft, the legs are all arranged along the radial direction, the ends of each leg are all provided with underwater photosynthetically active radiation sensors 13, and the underwater photosynthetically active radiation sensors 13 are all connected with the multi-port hub 11 through corresponding cable ropes 6.

[0032] The bottom of the multi-port hub 11 is provided with a conical solid counterweight with concentricity and coaxiality, so as to ensure that the center of gravity is at the center position, the conical solid counterweight penetrates the mounting disc, the top of the multi-port hub 11 is provided with a cavity, a multiplexer 16 is arranged in the cavity, the signal output ends of the underwater photosynthetically active radiation sensors 13 are all connected with the signal input ends of the multi-port hub 11 through corresponding cable ropes 6, a plurality of signals or data streams are combined into a single output, so that there is only one cable rope 6 for conveying, which is convenient for use, and the signal output end of the multi-port hub 11 is connected with the multi-channel data logger 2 through the cable rope 6 on the telescopic rod 4 to collect a single data stream and obtain a monitoring result.

[0033] As a preferred embodiment 3, the top of the multi-port hub 11 is provided with an underwater pressure sensor 14, the sensing end of which is located outside the multi-port hub 11, and the underwater pressure sensor 14 is connected with the multiplexer 16 through a corresponding cable 6. It is used for detecting water pressure, and the depth is calculated by pressure when the device falls to the bottom, which is used for mutual calibration with the counter 3.

[0034] As a preferred embodiment 4, the top of the multi-port hub 11 is concentrically and coaxially provided with a cable fixing buckle 15, and the cable 6 on the telescopic rod 4 is adjustably hung on the multi-port hub 11 through the cable fixing buckle 15. The sinking frame 12 can be regarded as being hung on the cable 6 of the telescopic rod 4 through the fixing buckle 15, so that the cable 6 bears the force instead of the wiring port, and the cable 6 can simultaneously serve as a bearing rope.

[0035] As a preferred embodiment 5, the outside of the sinking frame 12 is provided with a black coating. The black coating makes the surface have a high light absorption rate, so as to ensure that the light entering the water body has a small loss.

[0036] As a preferred embodiment 6, the number of the legs of the sinking frame 12 is not less than three. The accuracy of measurement is ensured.

[0037] As a preferred embodiment 7, the ends of the legs of the sinking frame 12 are all in the shape of water droplets, one side of each water droplet part points outward, and each water droplet part is provided with a sensor mounting seat for mounting an underwater photosynthetically active radiation sensor 13. A reverse water droplet structure is formed, which avoids a large number of bubbles around the sensor when the instrument is placed underwater, and the bubbles will refract and reflect part of the light entering the water body.

[0038] As a preferred embodiment 8, the counter 3 includes a guide wheel, the cable 6 is in guide cooperation with the guide wheel, one side of the guide wheel is provided with an angle sensor, the rotating shaft of the guide wheel is synchronous with the sensing end of the angle sensor, and the signal output end of the angle sensor is connected with the signal input end of the multi-channel data recorder 2. The distance of the cable 6 is converted through the number of rotations and the rotation angle of the angle sensor.

[0039] As a preferred embodiment 9, the fixed pulley module can directly install a fixed pulley or a lifting ring at the end of the telescopic rod 4.

[0040] As a preferred embodiment 10, the sinking frame 12 is made of metal and has an appearance similar to a trident star, which is formed by three reverse water droplet type legs connected in a ring shape at 120° around the multi-port hub 11, the free end of each leg is a circular ring type sensor fixing seat, the sinking frame is thin and narrow as a whole, and the outer surface is coated with a black coating with a high light absorption rate.

[0041] The counter 3 uses SP2800 series angle sensor, the underwater photosynthetically active radiation sensor 13 uses NHGH09 photosynthetically active radiation sensor; the multichannel data logger 2 and the multiplexer 16 all select existing equipment.

[0042] Working principle and process:

[0043] 1), the device is transported to the monitoring point, the telescopic rod 4 is adjusted to the appropriate length, the multichannel data logger 2 and the counter 3 are opened, the cable reel 5 is rotated to adjust the length of the cable 6; slowly rotate the cable reel 5, place the underwater light quantum measuring module 1 to the water surface, calibrate the multichannel data logger 2 and the counter 3 to zero;

[0044] 2), slowly rotate the cable reel 5, slowly lower the underwater light quantum measuring module 1 in the monitored water body, the multichannel data logger 2 displays and records the values of the underwater pressure sensor 14 and each underwater photosynthetically active radiation sensor 13 in real time, until the underwater light quantum module 1 reaches the water bottom, and the instrument is recovered;

[0045] 3), compare and correct each group of measured underwater photosynthetically active radiation data, convert the data of the underwater pressure sensor 14 and the surface counter 3 into water depth data for comparison and correction.

Claims

1. A high-precision device for measuring the depth of the true light layer in water, comprising a telescopic rod (4), a multi-channel data logger (2), a counter (3), a rope reel (5), and a cable (6), characterized in that, The handle end of the telescopic rod (4) is equipped with a multi-channel data logger (2), a counter (3) and a rope take-up reel (5). The output end of the telescopic rod (4) is equipped with a fixed pulley module. The multi-channel data logger (2) is connected to an underwater photonic quantum measurement module (1) via a cable (6). The cable (6) passes through the rope take-up reel (5), the counter (3) and the fixed pulley module in sequence.

2. The high-precision water body true light layer depth measurement device according to claim 1, characterized in that, The retraction of the cable rope (6) and the rotation of the rope take-up reel (5) are linked together. The counter (3) is used to count the distance of cable rope (6) being retracted and extended. The cable rope (6) is linked together with the underwater photonic quantum measurement module (1) through the fixed pulley module.

3. The high-precision water body true light layer depth measurement device according to claim 2, characterized in that, The underwater photonic quantum measurement module (1) includes a sinking frame (12). The sinking frame (12) has a mounting plate with concentric and coaxial mounting holes in the middle. A multi-port hub box (11) is rigidly connected to the mounting holes in a concentric and coaxial manner. Several legs are provided at equal intervals around the central axis on the outer side of the mounting plate. All legs are arranged radially. Each leg is provided with an underwater photosynthetic effective radiation sensor (13) at its end. The underwater photosynthetic effective radiation sensors (13) are all connected to the multi-port hub box (11) through corresponding cables (6).

4. The high-precision water body true light layer depth measurement device according to claim 3, characterized in that, The bottom of the multi-port hub (11) is provided with a concentric solid counterweight, which passes through the mounting plate. The top of the multi-port hub (11) is provided with a cavity, and a multiplexer (16) is provided in the cavity. The signal output end of the underwater photosynthetic effective radiation sensor (13) is connected to the signal input end of the multi-port hub (11) through the corresponding cable (6). The signal output end of the multi-port hub (11) is connected to the multi-channel data logger (2) through the cable (6) on the telescopic rod (4).

5. The high-precision water body true light layer depth measurement device according to claim 4, characterized in that, The top of the multiport hub (11) is provided with an underwater pressure sensor (14). The sensing end of the underwater pressure sensor (14) is located outside the multiport hub (11), and the underwater pressure sensor (14) is connected to the multiplexer (16) through a corresponding cable (6).

6. The high-precision water velocular depth measurement device according to claim 5, characterized in that, The top of the multi-port junction box (11) is provided with a cable fixing buckle (15) coaxially, and the cable (6) on the telescopic pole (4) forms an adjustable suspension with the multi-port junction box (11) through the cable fixing buckle (15).

7. A high-precision water body true light layer depth measuring device according to claim 6, characterized in that, The outer side of the sunken frame (12) is coated with a black coating.

8. A high-precision water body true light layer depth measuring device according to claim 7, characterized in that, The number of legs of the sunken frame (12) shall not be less than three.

9. A high-precision water body eurythmic depth measurement device according to claim 8, characterized in that, The legs of the sinking frame (12) are all teardrop-shaped, with one side of the teardrop pointing outward. Each teardrop is equipped with a sensor mounting base for installing an underwater photosynthetic effective radiation sensor (13).

10. A high-precision water body true light layer depth measuring device according to claim 1, characterized in that, The counter (3) includes a guide wheel, and the cable (6) forms a guiding fit with the guide wheel. An angle sensor is provided on one side of the guide wheel, and the rotating shaft of the guide wheel rotates synchronously with the sensing end of the angle sensor. The signal output end of the angle sensor is connected to the signal input end of the multi-channel data logger (2).

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