Detection apparatus and detection method for aquatic organisms in wide water area

Abstract

A detection apparatus, which is used for detecting aquatic organisms in a water area. The detection apparatus comprises: a plurality of detection units, which send transmitted signals into water and receive reflected signals of the transmitted signals, which reflected signals are reflected by aquatic organisms; and a control portion, which is used for controlling the detection units, wherein each detection unit has a transceiving period for sending a transmitted signal and receiving a reflected signal, and the control unit controls the detection units in a manner in which the transceiving periods of the detection units do not temporally overlap with each other, or the control unit controls the detection units in a manner in which the detection units synchronously send and receive signals, and the detection units send transmitted signals with different frequencies on the same occasion and only receive reflected signals of the transmitted signals.

Description

Detection device and detection method for aquatic ecological organisms in vast waters Technical Field

[0001] The present disclosure relates to the field of aquatic ecological organism detection, and more specifically, to a device and method for dynamically detecting the resource distribution of aquatic ecological organisms in rivers, lakes, and reservoirs. Background Art

[0002] In recent years, due to environmental changes, the detection of aquatic ecosystems has received increasing attention. For example, the China Yangtze River Basin Water Ecology Detection Center was established in May 2020 as a specialized institution for conducting water ecological detection in the Yangtze River Basin. Its primary mission is to identify basic ecological data for the Yangtze River, explore patterns of ecological change, and provide first-hand information and technical support for Yangtze River conservation. Its main responsibilities include formulating water ecological detection plans for the basin, organizing routine water ecological detection in the basin, conducting specialized water ecological detection in key basins, and conducting water ecological emergency detection for major emergencies.

[0003] On the other hand, fish, a part of aquatic ecosystems, are often designed and implemented in reservoirs to facilitate migration between upstream and downstream rivers. These fishways are often designed and implemented based on empirical knowledge, based on the topography of the river and reservoir. However, the effectiveness of these fishways, such as whether fish pass through them, when they pass through, and how many pass through, is not verifiable or controllable without appropriate means. Some reservoirs use boats to transport fish between upstream and downstream locations. While this allows for accurate information on fish numbers and sizes, it requires significant manpower and resources.

[0004] Patent document 1 discloses a method for evaluating the operation of fish-passing facilities. A sonar fish finder is installed at a flat position in a multi-level fishway. The detection angle of the sonar fish finder covers the entire pool body of the flat section of the fishway. The number of fish schools inside the flat pool body of each level of the fishway is calculated; the fish passing efficiency of the entire fishway at various water flow speeds is calculated; and the operation of the fish-passing facilities is evaluated.

[0005] The above detection method involves multiple detection units (e.g., acoustic sensors or sonar sensors) arranged in close proximity within a certain area synchronously transmitting and receiving signals to detect the distribution of aquatic organisms. However, when multiple detection units synchronously transmit and receive signals to detect the distribution of aquatic organisms, there is the problem of mutual interference between the detection unit signals. In current detection technologies, how to reduce the interference between the signals transmitted and received by multiple detection units is a key issue that needs to be addressed.

[0006] Prior art literature

[0007] Patent Document 1: CN116296501A Summary of the Invention

[0008] The purpose of the present disclosure is to provide a detection device and a detection method for aquatic ecological organisms, which can significantly reduce the interference between multiple detection units when sending and receiving signals.

[0009] As one aspect of the present disclosure, a detection device is provided for detecting aquatic organisms in water areas, which includes: a plurality of detection units, each of which sends a transmission signal into the water and receives a reflection signal of the transmission signal reflected by the aquatic organisms; a control unit, which controls each of the detection units, each of which has a transmission and reception period for sending the transmission signal and receiving the reflection signal; the control unit controls each of the detection units in such a manner that the transmission and reception periods of each of the detection units do not overlap in time; or, the control unit controls each of the detection units in such a manner that each of the detection units transmits and receives signals synchronously, and each of the detection units sends transmission signals of different frequencies at the same time and only receives the reflection signal of the transmission signal.

[0010] In the above-mentioned aquatic ecological organism detection device, when the control unit controls each detection unit in a manner such that the transmission and reception periods of each detection unit do not overlap in time, the transmission and reception periods of each detection unit are continuous in time.

[0011] In the above-mentioned aquatic ecological organism detection device, when the control unit controls each detection unit in a manner that the transmission and reception periods of each detection unit do not overlap in time, the transmission and reception periods of each detection unit are separated in time by a specified interval, i.e., a rest period.

[0012] In the above-mentioned aquatic ecological organism detection device, when the arrangement positions of the plurality of detection units have been determined, the distance between the detection units corresponding to adjacent transmission and reception periods is increased by adjusting the order in which the detection units transmit and receive signals.

[0013] In the above-mentioned aquatic biological detection device, when the arrangement positions of the plurality of detection units are determined, the control unit controls each detection unit in such a manner that the adjacent detection units in the arrangement positions send and receive signals in sequence.

[0014] In the above-mentioned detection device for aquatic ecological organisms, when the order in which each detection unit sends and receives signals is determined, by adjusting the setting position of each detection unit, after a signal is sent and received from one detection unit, a signal is sent and received from the next detection unit other than the detection unit adjacent to the one detection unit.

[0015] In the above-mentioned aquatic ecological organism detection device, when the control unit controls each detection unit in a manner that each detection unit sends and receives signals synchronously, and each detection unit sends a transmission signal with a different frequency at the same time and only receives the reflected signal of the transmission signal, each of the detection units has the same transmission frequency at different times.

[0016] In the above-mentioned aquatic ecological organism detection device, when the control unit controls each detection unit in a manner that each detection unit sends and receives signals synchronously, and each detection unit sends a transmission signal with a different frequency at the same time and only receives the reflected signal of the transmission signal, each of the detection units has a different transmission frequency at different times.

[0017] In the above-mentioned aquatic organism detection device, the control unit directly or indirectly controls the opening and closing of the detection unit.

[0018] As another aspect of the present disclosure, a method for detecting aquatic ecological organisms is provided, which is used to detect aquatic ecological organisms in a water area through a detection device, wherein the detection device includes: a plurality of detection units, each of the plurality of detection units sends a transmission signal into the water, and receives a reflection signal of the transmission signal reflected by the aquatic ecological organisms; a control unit controls each of the detection units, and each of the detection units has a transmission and reception period for sending the transmission signal and receiving the reflection signal. In the detection method, the control unit controls each of the detection units in a manner that the transmission and reception periods of each of the detection units do not overlap in time, or the control unit controls each of the detection units in a manner that each of the detection units transmits and receives signals synchronously, and each of the detection units sends transmission signals with different frequencies at the same time and only receives the reflection signal of the transmission signal.

[0019] In the above-mentioned method for detecting aquatic ecological organisms, when the control unit controls each detection unit in a manner such that the sending and receiving periods of each detection unit do not overlap in time, the control unit controls so that the sending and receiving periods of each detection unit are continuous in time.

[0020] In the above-mentioned method for detecting aquatic ecological organisms, when the control unit controls each detection unit in a manner so that the sending and receiving periods of each detection unit do not overlap in time, the control unit controls so that the sending and receiving periods of each detection unit are separated in time by a specified interval, i.e., a rest period.

[0021] In the above-mentioned method for detecting aquatic ecological organisms, when the arrangement positions of the plurality of detection units have been determined, the control unit increases the distance between the detection units corresponding to adjacent transmission and reception periods by adjusting the order in which the detection units transmit and receive signals.

[0022] In the above-mentioned method for detecting aquatic organisms, when the arrangement positions of the plurality of detection units are determined, the control unit controls each detection unit in such a manner that the detection units adjacent in the arrangement order sequentially transmit and receive signals.

[0023] In the above-mentioned method for detecting aquatic ecological organisms, the control unit adjusts the setting position of each detection unit after determining the order in which each detection unit sends and receives signals so that after sending and receiving signals from one detection unit, signals are sent and received from the next detection unit other than the detection unit adjacent to the one detection unit.

[0024] In the above-mentioned method for detecting aquatic ecological organisms, when the control unit controls each detection unit in a manner that each detection unit sends and receives signals synchronously, and each detection unit sends a transmission signal with a different frequency at the same time and only receives the reflected signal of the transmission signal, the control unit controls so that each of the detection units has the same transmission frequency at different times.

[0025] In the above-mentioned method for detecting aquatic ecological organisms, when the control unit controls each detection unit in a manner that each detection unit sends and receives signals synchronously, and each detection unit sends a transmission signal with a different frequency at the same time and only receives the reflected signal of the transmission signal, the control unit controls so that each of the detection units has a different transmission frequency at different times.

[0026] In the above-mentioned method for detecting aquatic organisms, the control unit directly or indirectly controls the opening and closing of the detection unit.

[0027] As another aspect of the present disclosure, a computer-readable storage medium is provided, on which a computer program / instruction is stored, characterized in that when the computer program / instruction is executed by a processor, the steps of the above-mentioned method for detecting aquatic ecological organisms are implemented.

[0028] As another aspect of the present disclosure, a computer program product is provided, comprising a computer program / instruction, wherein the computer program / instruction, when executed by a processor, implements the steps of the above-mentioned method for detecting aquatic ecological organisms.

[0029] In the present disclosure, by appropriately adjusting the timing, configuration position, and transmission and reception frequency of the detection units for sending and receiving signals, the interference between multiple detection units when sending and receiving signals can be greatly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] FIG1 is a schematic diagram showing the working principle of a detection unit of a detection device.

[0031] FIG2 is a schematic diagram showing interference between detection units when the detection device performs aquatic ecological organism detection.

[0032] FIG3 shows a timing diagram of signals of interference between detection units when the detection device performs aquatic ecological organism detection.

[0033] FIG4 is a schematic diagram showing a fish detection image when interference occurs between detection units of the detection device during detection of aquatic organisms.

[0034] FIG5 shows a timing diagram of using multiple detection units to simultaneously detect aquatic organisms in a water area in the prior art.

[0035] FIG6 shows a timing diagram of detecting aquatic organisms in a water area using the detection device according to the first embodiment of the present application.

[0036] FIG7 shows a timing diagram of detection signals of each detection unit when the detection device according to the first embodiment of the present application is used.

[0037] FIG8 shows a timing diagram of detecting aquatic organisms in a water area using the detection device according to the first embodiment of the present application.

[0038] FIG9 shows a timing diagram of detection signals of each detection unit when the detection device according to the first embodiment of the present application is used.

[0039] FIG10 is a top view showing an arrangement structure of detection units in a detection device according to a third embodiment of the present application.

[0040] FIG11 is a schematic diagram showing the sending and receiving of detection signals using the detection device according to the fourth embodiment of the present application.

[0041] FIG12 is a schematic diagram showing the sending and receiving of detection signals using the detection device according to the fourth embodiment of the present application.

[0042] FIG13 shows a schematic diagram of using the detection device of the present application to send and receive information with a server / cloud.

[0043] FIG14 shows a schematic diagram of controlling the detection device of the present application. DETAILED DESCRIPTION

[0044] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concepts of the example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0045] The aquatic ecological organism detection device and the aquatic ecological organism detection method provided by the present disclosure are used to detect aquatic ecological organisms living in vast water bodies such as rivers, lakes and reservoirs.

[0046] In the following exemplary embodiments of the present disclosure, fish are used as an example of aquatic ecological organisms for illustration. It can be understood that in addition to being used to detect fish or fish schools, the present disclosure can also be used to detect other aquatic ecological organisms such as finless porpoises, jellyfish, etc.

[0047] The detection water area refers to the vast water surface area that you want to investigate. It can be a section of river, a part of a river, an area near the upstream of a reservoir fishway, an area near the downstream of a reservoir fishway, etc. It is usually a rectangular area on the water surface. Depending on the terrain structure, you can also choose a circular or other shaped area.

[0048] The detection unit used in the detection of aquatic ecological organisms is, for example, an acoustic sensor or a sonar sensor. The working principle of the detection unit is described with reference to FIG1 . As shown in the upper figure of FIG1 , the detection unit repeatedly sends a transmission pulse as a transmission signal at a prescribed period and receives a reflection signal from the transmission signal, thereby obtaining data. For the transmission pulse as the transmission signal, the frequency, pulse width, waveform, etc. can be arbitrarily set; wherein, the receiving interval is used to receive the reflection signal of the transmission pulse. As shown in the lower figure of FIG1 , when the detection unit is used to detect an object (fish or the bottom of the water, etc.), the reflection signal from the object (the triangle in the figure) is delayed relative to the transmission signal and is received for a time corresponding to the distance between the object and the detection unit. Hereinafter, the transmission signal and the reflection signal are sometimes collectively referred to as the detection signal.

[0049] FIG2 is a schematic diagram showing interference between detection units when a detection device is detecting water areas, and FIG3 is a timing diagram showing interference signals between detection units when a detection device is detecting water areas for aquatic organisms. In this field, signals of erroneous detection caused by mutual influence between ultrasonic vibrators (detection units) located at adjacent positions are referred to as interference signals. For example, a detection device is configured in a certain detection water area, and the detection device has two detection units 1 and 2 arranged close to each other on the water surface. The straight-line distance between detection unit 1 and the bottom of the water directly below is D1, and the straight-line distance between detection unit 2 and the bottom of the water directly below is D2, D1 < D2, the straight-line distance between detection unit 1 and the bottom of the water directly below detection unit 2 is R2, and the straight-line distance between detection unit 2 and the bottom of the water directly below detection unit 1 is R1; when detection units 1 and 2 send and receive signals at the same time and in the same period (synchronization) to detect water ecological organisms, a graph as shown in FIG3 will be formed on the time axis, wherein the solid triangles represent the detection signals of detection units 1 and 2 themselves, and the dotted triangles represent interference signals from each other. For example, as shown in Figure 4, when detecting a school of fish, interference signals from the other party may be mistakenly displayed on the screen as a school of fish. This interference signal not only affects the detection accuracy of the detection device as a whole, but also directly affects the detection results when there are many detection units in close proximity. In this specification, the signal that causes detection errors is referred to as an interference signal. Therefore, in the prior art, how to reduce the interference signals between detection units is an important issue that needs to be addressed.

[0050] After research and experiments, the inventors of this application believe that in order to reduce the interference signals between detection units to a certain extent, the following solution can be adopted:

[0051] (1) Stagger the signal transmission and reception periods of each detection unit;

[0052] (2) Appropriately adjust the distance between detection units in the same area;

[0053] (3) Each detection unit transmits and receives a detection signal using a frequency different from that of the other detection units.

[0054] As the principle of the above-mentioned scheme (1), since the transmission and reception periods of the signals of each detection unit are staggered with each other, after a detection unit transmits and receives a detection signal, the detection signal will gradually attenuate (weaken) over time. Similarly, the interference signal will also gradually attenuate (weaken) over time. Therefore, the interference to the next detection unit performing detection will also be reduced.

[0055] As the principle of the above solution (2), the greater the distance between the detection units, the smaller the strength of the interference signals between them. Therefore, the distance between adjacent detection units can be appropriately increased to reduce the interference between adjacent detection units.

[0056] As the principle of the above-mentioned solution (3), compared with the case where each detection unit transmits and receives signals synchronously and at the same transmission frequency, the interference between the transmitted and received signals of different frequencies is smaller. For this reason, the transmission frequencies of the multiple detection units are set to be different. By using a filter or the like to receive the reflected signal of a specific transmission frequency, the interference can be further reduced.

[0057] The above is a solution proposed by the inventor of the present application in the present application for reducing interference signals between detection units in the prior art. In actual implementation, various modifications and improvements may be made.

[0058] The specific implementation of this application is described below.

[0059] First embodiment

[0060] FIG5 shows a timing diagram of a detection device used in the prior art, in which multiple detection units send and receive signals at the same time and in the same period (synchronized and with the same transmission frequency) to detect aquatic organisms in a water area. The detection device comprises: detection units 1 to 4 (for example, they can be acoustic sensors or sonar sensors 1 to 4), which are arranged in an array shape, such as a square array, for sending a signal into the water and receiving a reflected signal of the signal reflected by the aquatic organisms to perform detection, and a control unit (not shown) for controlling each detection unit. The sending and receiving periods of different detection units are represented by different colors. During the sending and receiving period, the sending signal and the reflected signal are repeatedly sent and received in the same period. As can be seen from the figure, the sending and receiving periods of the detection units 1 to 4 are the same, and the detection signal is sent and received synchronously (refer to FIG3 ). Therefore, in this detection method, the detection units 1 to 4 will form a strong interference signal with each other.

[0061] FIG6 shows a timing diagram of the detection signals of each detection unit when using the detection device of the first embodiment of the present application. As shown in the figure, due to the close distance, when sending and receiving signals as shown in FIG5, there is interference between the detection units, that is, the sending and receiving signals of each detection unit interfere with each other. However, in the present application, detection units 1 to 4 send and receive detection signals sequentially, and the sending and receiving periods of each detection unit do not overlap in time and are continuous. Specifically, the control unit controls detection units 1 to 4 so that detection unit 1 first sends and receives the detection signal, then detection unit 1 stops sending and receiving signals and detection unit 2 sends and receives detection signals, then detection unit 2 stops sending and receiving signals and detection unit 3 sends and receives detection signals, and finally detection unit 3 stops sending and receiving signals and detection unit 4 sends and receives detection signals. When the sending and receiving periods of the detection signal are sequential, since the sending and receiving signals will gradually attenuate over time, compared with the case of synchronous sending and receiving signals, the sequential sending and receiving of detection signals is only subject to interference from adjacent detection units sending and receiving detection signals, and this interference has been attenuated. It should be noted that two adjacent transmission and reception periods do not necessarily have to be completely independent (completely non-overlapping), but can also partially overlap. Generally speaking, if the transmission and reception periods overlap, the smaller the overlap, the lower the interference. Even if there is partial overlap, compared with the complete overlap in the existing technology, it can still reduce interference to a certain extent.

[0062] Referring to Figure 7, Figure 7 shows a timing diagram of the detection signals of each detection unit when using the detection device of the first embodiment of the present application, wherein the solid triangle represents the detection signal of the detection unit 1 to 3 itself, and the dotted triangle represents the interference signal from the other party. As can be seen from Figure 8, the detection unit 1 initially transmits and receives the signal, and then the detection unit 1 stops transmitting and receiving the signal, and the detection unit 2 transmits and receives the signal. At this time, the interference signal of the detection unit 1 appears only in the initial stage of the transmission and reception period of the detection unit 2, and the interference signal is weaker than the case of synchronous transmission and reception; similarly, the detection unit 2 stops transmitting and receiving the signal, and the detection unit 3 transmits and receives the signal. At this time, the interference signal of the detection unit 2 appears only in the initial stage of the transmission and reception period of the detection unit 3. It can be seen from this that in the embodiment of the present application, the control unit sets the transmission and reception period of the signal of each detection unit to be non-overlapping, thereby greatly reducing the interference signals between each other.

[0063] Second embodiment

[0064] FIG8 shows a timing diagram of detecting aquatic organisms using the second embodiment of the present application. As shown in FIG8 , the detection units 1 to 4 also sequentially send and receive detection signals. Unlike the first embodiment, the control unit controls each detection unit 1 to 4 so that a certain time interval is set between two adjacent transmission and reception periods, that is, a rest period is set. In addition to being able to reduce interference in the same way as the first embodiment, the second embodiment of the present application also has the following technical effects during the rest period: (1) By setting the rest period, the signal of the previous transmission and reception period can be further attenuated, so that the interference to the detection unit in the next transmission and reception period is smaller; (2) In addition, since there are multiple detection units, the detection signal of the detection unit may sometimes be delayed. For example, the depth at which the detection unit reaches the bottom of the water may be different. Generally, as the depth increases, the time required for the detection signal to return will become longer, resulting in the time point of receiving the signal being delayed due to the water depth; therefore, by setting the rest period, even if the detection signal is delayed in the previous transmission and reception period, the delayed detection signal will be returned to a large extent during the rest period and will not interfere with the next transmission and reception period.

[0065] Referring to Figure 9, Figure 9 shows a timing diagram of the detection signals of each detection unit when using the detection device of the second embodiment of the present application, wherein the solid triangles represent the detection signals of detection units 1 to 3 themselves. As can be seen from Figure 9, the control unit controls each detection unit so that detection unit 1 initially transmits and receives signals, then detection unit 1 stops transmitting and receiving signals, and after a rest period, detection unit 2 transmits and receives signals. At this time, no interference signal from detection unit 1 appears during the transmission and reception period of detection unit 2, that is, the detection signal of detection unit 1 has completely attenuated during the previous rest period. Similarly, detection unit 2 stops transmitting and receiving signals, and after a rest period, detection unit 3 transmits and receives signals. At this time, no interference signal from detection unit 2 appears during the transmission and reception period of detection unit 3, that is, the detection signal of detection unit 2 has also completely attenuated during the previous rest period. It can be seen from this that in the second embodiment of the present application, by providing a rest period between the transmission and reception periods of the detection signals of each detection unit, interference signals between each other can be further reduced.

[0066] It should be noted that although the interference signal between the detection units can be further reduced by setting a rest period, the longer the rest period, the better. The reasons are as follows: (1) This application is used to detect aquatic organisms, which are usually mobile. If the rest period is too long, the movement of the aquatic organisms will affect the detection accuracy. Therefore, the rest period can be appropriately set according to the type of aquatic organisms, the movement speed, etc.; (2) As mentioned above, the detection area is equipped with multiple detection units, and the distances between the detection units and the bottom of the water are not the same. If the water depth is shallow, even if the rest period is short, the detection signal can be fully attenuated. If the water depth is deep, the rest period needs to be set longer. Therefore, the corresponding rest period can be appropriately set according to the depth of the detection unit from the bottom of the water; (3) If the rest period is longer than the attenuation time of the detection signal during the transmission and reception period of the previous detection unit, the extra time will be wasted and may also affect the detection accuracy. Therefore, it is preferred that the rest period is less than or equal to the attenuation time of the detection signal during the transmission and reception period of the previous detection unit.

[0067] In addition, the respective pause periods may be set to be the same or different, and it is preferable to set different pause periods according to the above circumstances.

[0068] Third embodiment

[0069] Figure 10 shows a top view of the arrangement of detection units in the detection device of the third embodiment of the present application. As shown in the left figure, 16 detection units are arranged on the water surface. The 16 detection units are arranged in a quadrilateral array, but this is not limited to this arrangement. Depending on the shape and size of the monitored water area, multiple detection units can also be configured in a square array, rectangular array, oblique array, circular array, concentric circle array, circular arc array, triangular array, polygonal array, or array of any other shape. On the basis of the first embodiment of the present application, each detection unit can send and receive detection signals in sequence in the order of 1~2~3~4~8~7~6~5~9~10~11~12~16~15~14~13 or the arrangement order of 1~5~9~13~14~10~6~2~3~7~11~15~4~8~12~16, that is, when the arrangement position of multiple detection units has been determined, the detection units adjacent to each other in the arrangement position can send and receive detection signals in sequence to reduce mutual interference between the detection units.

[0070] In addition, as mentioned above, the inventors of the present application have found through research that appropriately adjusting the distance between the detection units can further reduce the mutual interference between the detection units. According to this idea, the distance between two adjacent detection units during the transmission and reception period can be further adjusted on the basis of the first embodiment to reduce the mutual interference between the devices. Specifically, when the arrangement positions of the multiple detection units are determined, the order of the transmission and reception signals of the multiple detection units is modified to 1~3~5~7~9~11~13~15~2~4~6~10~12~14~16. Thus, by increasing the distance between the two adjacent detection units during the transmission and reception period, that is, after transmitting and receiving a signal from one detection unit, a signal is transmitted and received from the next detection unit other than the detection unit adjacent to the one detection unit (the detection units adjacent in position do not send signals during the adjacent transmission and reception periods), the mutual interference between the two adjacent detection units can be weakened as a whole.

[0071] In addition, as shown in the right figure, there are 16 detection units arranged on the water surface, and the order of the transmission and reception periods of the 16 detection units is fixed, that is, the detection signals need to be transmitted and received in the order of 1~2~3~4~5~6~7~8~9~10~11~12~13~14~15~16. The inventors of this application have found through research that appropriately adjusting the distance between the detection units can further reduce the mutual interference between the devices. Similarly, based on this idea, the distance between two adjacent detection units during the transmission and reception period can be further adjusted on the basis of the first embodiment to reduce the mutual interference between the devices. Specifically, the order of the transmission and reception periods of multiple detection units is fixed. Therefore, the positions of the 16 detection units can be adjusted. Through the arrangement positions on the right side of Figure 8, even if the detection signals are transmitted and received in the order of 1~2~3~4~5~6~7~8~9~10~11~12~13~14~15~16, the distance between the two adjacent detection units during the transmission and reception period can be increased, and the mutual interference between the two adjacent detection units can also be reduced as a whole.

[0072] Fourth embodiment

[0073] Figures 11 and 12 are schematic diagrams showing the transmission and reception of detection signals by a detection device according to a fourth embodiment of the present application. In this embodiment, the transmission and reception periods of each detection unit are not separated in time sequence. Instead, each detection unit transmits and receives signals at the same time and with the same cycle (synchronization). Only the transmission frequency of each detection unit is changed to reduce interference between the detection units.

[0074] Referring to Figure 11, for example, when four detection units are arranged in a square array as described above, each of the detection units transmits and receives signals at the same time and in the same period (synchronization), and the timings for each detection unit to transmit and receive signals are the same. The control unit controls each detection unit so that detection unit 1 always uses frequency f1 to transmit and receive detection signals at each timing, detection unit 2 always uses frequency f2 to transmit and receive detection signals at each timing, detection unit 3 always uses frequency f3 to transmit and receive detection signals at each timing, and detection unit 4 always uses frequency f4 to transmit and receive detection signals at each timing. With the detection units of this embodiment, there is no need to make special adjustments to the transmission and reception periods of the detection units. It is only necessary to set the transmission frequencies of each detection unit to be different, thereby reducing interference between the detection units. It should be noted that in order to enable the detection unit to receive only the reflected signal of a specific transmission frequency (the reflected signal of the signal transmitted at its own frequency), a filter or other device can be used to achieve signal reception.

[0075] Referring to Figure 12, each of the detection units 1 to 4 can also use different transmission frequencies at different times. For example, the control unit controls each detection unit so that detection unit 1 uses frequency f1 to transmit and receive detection signals at a first time, detection unit 2 uses frequency f2 to transmit and receive detection signals at a first time, detection unit 3 uses frequency f3 to transmit and receive detection signals at a first time, and detection unit 4 uses frequency f4 to transmit and receive detection signals at a first time. Similarly, the control unit controls each detection unit so that detection unit 1 uses frequency f2 to transmit and receive detection signals at a second time, detection unit 2 uses frequency f3 to transmit and receive detection signals at a second time, detection unit 3 uses frequency f4 to transmit and receive detection signals at a second time, and detection unit 4 uses frequency f1 to transmit and receive detection signals at a second time; and so on. Thus, with the detection units of this embodiment, there is no need to make special adjustments to the transmission and reception periods of the detection units; only the transmission frequencies of each detection unit need to be set to reduce interference between the detection units. It should be noted that in order for the detection units to receive reflected signals of a specific transmission frequency (reflected signals of signals transmitted at their own frequency), devices such as filters can be used to achieve signal reception.

[0076] As described above, in this embodiment, each detection unit can be controlled in such a way that each detection unit transmits and receives signals synchronously, and each detection unit transmits a transmission signal with a different frequency at the same time and only receives the reflected signal of the transmission signal, thereby reducing interference between the detection units.

[0077] In addition, as shown in FIG13 , the detection device of the present application can be connected to the server / cloud in a wireless or wired manner, thereby exchanging data with the server / cloud and controlling the opening and closing of the detection device. Specifically, as shown in FIG13 and FIG14 , the detection device can receive an opening and closing (ON / OFF) instruction from the server / cloud, and the control unit directly opens and closes the detection unit of the detection device according to the opening and closing instruction; or, the detection device can receive an opening and closing schedule from the server / cloud, and the control unit opens and closes the detection unit of the detection device in the corresponding time period according to the opening and closing schedule. By controlling the opening and closing of the detection device, the detection device is turned on when detection is required and turned off when detection is not required, thereby saving power resources; in addition, the detection device can be connected to the server / cloud in a wireless or wired manner and exchange data, realizing the sending and receiving of detection data and control data and flexible control of the detection device, thereby enabling unified management.

[0078] The above describes the implementation of the detection device of the present application. The method implementation corresponding to the present application can also be implemented in the following manner.

[0079] A detection method for detecting aquatic organisms in a water area using a detection device, wherein the detection device comprises:

[0080] A plurality of detection units are provided, each of which transmits a transmission signal into the water and receives a reflection signal of the transmission signal reflected by the aquatic organisms. A control unit controls each of the detection units, and each of the detection units has a transmission and reception period for transmitting the transmission signal and receiving the reflection signal. In the detection method, the control unit controls each of the detection units in such a manner that the transmission and reception periods of the detection units do not overlap in time, or the control unit controls each of the detection units in such a manner that each of the detection units transmits and receives signals synchronously and each of the detection units transmits transmission signals with different frequencies at the same time and only receives the reflection signal of the transmission signal.

[0081] In the above-mentioned detection method, when the control unit controls each detection unit in such a manner that the transmission and reception periods of each detection unit do not overlap in time, the control unit controls so that the transmission and reception periods of each detection unit are continuous in time.

[0082] In the above-mentioned detection method, when the control unit controls each detection unit in such a manner that the transmission and reception periods of each detection unit do not overlap in time, the control unit controls so that the transmission and reception periods of each detection unit are separated in time by a prescribed interval, i.e., a rest period.

[0083] In the above-mentioned detection method, when the control unit controls each detection unit in a manner so that the transmission and reception periods of each detection unit do not overlap in time, the control unit, when the arrangement positions of the plurality of detection units have been determined, adjusts the order in which the detection units transmit and receive signals, so that after a detection unit transmits and receives a signal, a next detection unit other than a detection unit adjacent to the detection unit transmits and receives a signal.

[0084] In the above-mentioned detection method, when the control unit controls each detection unit in a manner that the transmission and reception periods of each detection unit do not overlap in time, and when the arrangement positions of the plurality of detection units have been determined, the control unit controls each detection unit in a manner that the detection units adjacent in the arrangement order transmit and receive signals in turn.

[0085] In the above-mentioned detection method, when the control unit controls each detection unit in a manner so that the transmission and reception periods of each detection unit do not overlap in time, the control unit increases the distance between the detection units corresponding to adjacent transmission and reception periods by adjusting the setting position of each detection unit after determining the order in which each detection unit transmits and receives signals.

[0086] In the above-mentioned detection method, when the control unit controls each detection unit in such a manner that each detection unit transmits and receives signals synchronously, and each detection unit transmits a transmission signal with a different frequency at the same time and only receives a reflected signal of the transmission signal, the control unit controls so that each of the detection units has the same transmission frequency at different times.

[0087] In the above-mentioned detection method, when the control unit controls each detection unit in such a manner that each detection unit transmits and receives signals synchronously, and each detection unit transmits a transmission signal with a different frequency at the same time and only receives a reflected signal of the transmission signal, the control unit controls so that each of the detection units has a different transmission frequency at different times.

[0088] In the above detection method, the control unit directly or indirectly controls the opening and closing of the detection unit.

[0089] The above describes the aquatic ecological organism monitoring method disclosed in the present invention. The execution order of some steps can be adjusted as needed, and some steps can be deleted or added as needed.

[0090] In addition, the present application may also provide a computer-readable storage medium having a computer program / instruction stored thereon, which implements the steps of the above-mentioned detection method when the computer program / instruction is executed by a processor.

[0091] In addition, the present application may also provide a computer program product, including a computer program / instruction, wherein the computer program / instruction implements the steps of the above-mentioned detection method when executed by a processor.

[0092] In addition, the present application is not limited to river waters, but can also be applied to wider waters such as oceans and lakes.

[0093] The above is a preferred embodiment of the present disclosure, but the present disclosure is not limited thereto. Various changes, improvements and equivalent replacements made within the technical ideas and principles of the present disclosure should be included in the protection scope of the present disclosure.

Claims

1. A detection device for detecting aquatic organisms in water areas, wherein: include: Multiple detection units respectively send signals into the water and receive reflected signals of the sent signals reflected by the aquatic ecological organisms, A control unit controls each of the detection units. Each of the detection units has a transceiver period for transmitting the transmission signal and receiving the reflection signal, and the control unit controls each of the detection units in such a manner that the transceiver periods of the detection units do not overlap in time, or, The control unit controls each of the detection units so that the detection units transmit and receive signals synchronously, and each of the detection units transmits transmission signals with different frequencies at the same timing and receives only reflected signals of the transmission signals.

2. The detection device according to claim 1, wherein When the control unit controls each of the detection units so that the transmission and reception periods of the detection units do not overlap in time, The transmitting and receiving periods of each detection unit are continuous in time.

3. The detection device according to claim 1, wherein When the control unit controls each of the detection units so that the transmission and reception periods of the detection units do not overlap in time, The transmission and reception periods of the detection units are separated in time by a predetermined interval, ie, a rest period.

4. The detection device according to claim 2, wherein: When the arrangement positions of the plurality of detection units are determined, the distance between the detection units corresponding to adjacent transmission and reception periods is increased by adjusting the order in which the detection units transmit and receive signals.

5. The detection device according to claim 2, wherein: When the arrangement positions of the plurality of detection units are determined, the control unit controls the detection units so that the detection units adjacent to each other in the arrangement positions transmit and receive signals in sequence.

6. The detection device according to claim 2, wherein: When the order of sending and receiving signals by the detection units is determined, the setting positions of the detection units are adjusted so that after a detection unit sends and receives a signal, the next detection unit other than the detection unit adjacent to the detection unit sends and receives a signal.

7. The detection device according to claim 1, wherein: When the control unit controls each of the detection units so that each of the detection units transmits and receives signals synchronously and each of the detection units transmits a transmission signal with a different frequency at the same time and receives only a reflected signal of the transmission signal, Each of the detection units has the same transmission frequency at different times.

8. The detection device according to claim 1, wherein: When the control unit controls each of the detection units so that each of the detection units transmits and receives signals synchronously and each of the detection units transmits a transmission signal with a different frequency at the same time and receives only a reflected signal of the transmission signal, Each of the detection units has a different sending frequency at different times.

9. The detection device according to any one of claims 1 to 8, wherein: The control unit directly or indirectly controls the opening and closing of the detection unit.

10. A detection method for detecting aquatic organisms in a water area using a detection device, wherein: The detection device comprises: A plurality of detection units, each of which sends a signal into the water and receives a reflected signal of the signal reflected by the aquatic organisms. A control unit controls each of the detection units. Each of the detection units has a transceiver period for sending the transmission signal and receiving the reflection signal. In the detection method, The control unit controls each of the detection units so that the transmission and reception periods of the detection units do not overlap in time, or The control unit controls each of the detection units so that the detection units transmit and receive signals synchronously, and each of the detection units transmits transmission signals with different frequencies at the same timing and receives only reflected signals of the transmission signals.

11. The detection method according to claim 10, wherein: When the control unit controls each of the detection units so that the transmission and reception periods of the detection units do not overlap in time, The control unit performs control so that the transmission and reception periods of the detection units are continuous in time.

12. The detection method according to claim 10, wherein: When the control unit controls each of the detection units so that the transmission and reception periods of the detection units do not overlap in time, The control unit performs control so that a predetermined interval, ie, a rest period, is placed between the transmission and reception periods of the respective detection units.

13. The detection method according to claim 11, wherein: When the arrangement positions of the plurality of detection units are determined, the control unit increases the distance between the detection units corresponding to adjacent transmission and reception periods by adjusting the order in which the detection units transmit and receive signals.

14. The detection method according to claim 11, wherein: When the arrangement positions of the plurality of detection units are determined, the control unit controls the detection units so that the detection units adjacent to each other in the arrangement positions sequentially transmit and receive signals.

15. The detection method according to claim 11, wherein: When the order of sending and receiving signals by each detection unit is determined, the control unit adjusts the installation position of each detection unit so that after sending and receiving signals from one detection unit, signals are sent and received from the next detection unit other than the detection unit adjacent to the one detection unit.

16. The detection method according to claim 9, wherein: When the control unit controls each of the detection units so that each of the detection units transmits and receives signals synchronously and each of the detection units transmits a transmission signal with a different frequency at the same time and receives only a reflected signal of the transmission signal, The control unit performs control so that each of the detection units has the same transmission frequency at different timings.

17. The detection method according to claim 9, wherein: When the control unit controls each of the detection units so that each of the detection units transmits and receives signals synchronously and each of the detection units transmits a transmission signal with a different frequency at the same time and receives only a reflected signal of the transmission signal, The control unit performs control so that each of the detection units has a different transmission frequency at different timings.

18. The detection method according to any one of claims 9 to 17, wherein: The control unit directly or indirectly controls the opening and closing of the detection unit.

19. A computer-readable storage medium having a computer program / instruction stored thereon, characterized in that: When the computer program / instructions are executed by a processor, the steps of the detection method according to any one of claims 9 to 17 are implemented.

20. A computer program product comprising a computer program / instructions, wherein: When the computer program / instructions are executed by a processor, the steps of the detection method according to any one of claims 9 to 17 are implemented.

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