Discontinuous one-way rotating fluid section sonar scanning device

Abstract

The utility model relates to a discontinuous one-way rotating fluid section sonar scanning device, and belongs to the technical field of water flow detection. According to the technical scheme, a motor shaft of a stepping motor drives a rotating disc close to the inner wall of the front side to rotate, a second magnet on the rotating disc is matched with a first magnet on a magnet support through magnetic coupling, the magnet support outside the front side wall of a waterproof shell and a sliding shaft sleeve are driven to rotate around a fixed shaft, and a sensor on the sliding shaft sleeve rotates along with the magnet support; the stepping motor performs forward and reverse alternate discontinuous rotation within the range of more than 180 degrees and less than 360 degrees, and the sensor performs forward and reverse alternate rotary scanning within the range of more than 180 degrees and less than 360 degrees in a water-passing section. The device has the advantages that winding damage of a sensor cable is avoided, magnetic coupling is adopted to replace a conductive slip ring, only waterproof sealing needs to be carried out on the driving motor and the control module, the sensor does not need to be sealed, reliability is improved, and cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of fluid section sonar scanning devices of discontinuous unidirectional rotation, belong to water flow detection technical field. BACKGROUND

[0002] Water delivery pipe network needs to obtain flow by detecting water passing section, and the prior art usually uses rotating sonar to detect water delivery pipe network, and the rotating sonar is arranged in water, and the beam is continuously rotated and scanned in the water passing section in a single direction 360°, so as to realize omnidirectional detection and imaging of underwater environment, and scan the pipe blockage and defects in the water delivery pipe network. The pipe of the water delivery pipe network includes pipe culvert and water delivery tunnel, etc., and the cross section includes square pipe and circular pipe, etc. The problems of the prior art are as follows: the sensor needs to be continuously rotated in a single direction 360 degrees in the water passing section, in order to prevent the winding damage of the sensor cable, the conductive slip ring must be used for electrical connection; the sensor, conductive slip ring, driving motor and control module of the prior art need to be used together with a waterproof sealing rubber sleeve, and the transmission and reception of sensor sound waves must pass through different media: coupling agent (all of sonar sensor, driving motor, conductive slip ring and control module are soaked therein), waterproof sensor protection rubber sleeve with minimum sound wave attenuation and detected sewage. The disadvantages are complex structure, the protection rubber sleeve is easily damaged due to the continuous rotation and friction of the sensor, which leads to the leakage of the coupling agent, and the sewage entering the protection rubber sleeve cannot be repaired, which increases the cost. The rotating sonar is expensive, with a domestic price of more than 70,000 yuan and an imported price of more than 96,000 yuan. After the protection rubber sleeve of the prior art rotating sonar is damaged, some people use black adhesive tape to repair it, but the sewage has already entered and affects the normal detection.

[0003] There are only two ways for underwater scanning of sonar sensor: phased array of multi-point array sensor without mechanical drive and single sensor moving scanning with mechanical drive. The present utility model relates to the latter with low cost, and the problem to be solved is the transmission of control signal under the condition of absolute waterproof of driven sensor signal underwater. UTILITY MODEL CONTENT

[0004] The utility model aims to provide a kind of fluid section sonar scanning devices of discontinuous unidirectional rotation, let sensor float below, under the premise of ensuring scanning all water passing sections, change the continuous rotation of sensor in a single direction 360 degrees in water passing section into discontinuous rotation, and the sensor is alternately rotated in a single direction in the range of more than 180 degrees and less than 360 degrees, to avoid winding damage of sensor cable, replace conductive slip ring with magnetic coupling, only need to waterproof driving motor and control module, and the sensor does not need to be sealed, improve reliability, reduce cost, and solve the above technical problems of the prior art.

[0005] The technical scheme of the utility model is:

[0006] The application discloses a non-continuous one-way rotating fluid section sonar scanning device, which comprises a control module, a sensor assembly and a sensor driving device, wherein the sensor driving device comprises a waterproof shell, a rotating disc, a stepping motor and a fixed shaft, the waterproof shell is divided into a front space and a rear space by a motor mounting plate, the stepping motor is arranged in the rear space and is filled with glue to form a waterproof seal, a motor shaft of the stepping motor penetrates through the motor mounting plate into the front space, the rotating disc is arranged on the motor shaft, and a magnet II is arranged on the rotating disc and arranged close to an inner wall of a front side of the waterproof shell; a fixed shaft is arranged on an outer wall of the front side of the waterproof shell, the sensor assembly is arranged on the fixed shaft, the sensor assembly comprises a sensor, a magnet support and a sliding shaft sleeve, the sliding shaft sleeve is sleeved on the fixed shaft, the magnet support is arranged on the sliding shaft sleeve, a magnet I which is magnetically coupled with the magnet II on the rotating disc is arranged on the magnet support, and the sensor is fixed to a front end portion of the sliding shaft sleeve; the motor shaft of the stepping motor drives the rotating disc close to the inner wall of the front side to rotate, the magnet II on the rotating disc is matched with the magnet I on the magnet support through magnetic coupling, the magnet support and the sliding shaft sleeve outside the front side wall of the waterproof shell are driven to rotate around the fixed shaft, and the sensor on the sliding shaft sleeve rotates accordingly; the control module is connected with the stepping motor and the sensor; the stepping motor is alternately and non-continuously rotated in a range greater than 180 degrees and less than 360 degrees, and the sensor is alternately and non-continuously rotated in a range greater than 180 degrees and less than 360 degrees in a water section.

[0007] Further, the sensor comprises a sonar sensor and floats below the water surface, the sensor of the application is not continuously and one-way rotated, but is non-continuously and alternately rotated in a range greater than 180 degrees and less than 360 degrees.

[0008] Further, the control module is arranged in the rear space of the waterproof shell together with the stepping motor.

[0009] Further, the control module is arranged outside the waterproof shell and is connected with the stepping motor and the sensor in the waterproof shell through a waterproof cable.

[0010] Further, the control module is known, and it is also known that the control module controls the sonar sensor to be alternately and non-continuously rotated in a range greater than 180 degrees and less than 360 degrees.

[0011] Further, the sensor assembly and the sensor driving device are arranged below a floating body, the floating body floats on the water surface, the sensor assembly is located below the water surface, and the sensor of the sensor assembly is alternately and non-continuously rotated in a range greater than 180 degrees and less than 360 degrees in a water section below the floating body.

[0012] Further, the sensor is a combination of a sonar sensor and a Doppler sensor, the sonar sensor and the Doppler sensor are arranged together and are driven to rotate by the same sensor driving device.

[0013] The sonar sensor directly detects and identifies the object in the water and the contour of the water bottom, the sonar sensor emits a sound wave signal, when meeting the object, the sound wave signal is reflected back, the distance and the position of the object are calculated according to the reflection time and the wave type, and the ultrasonic sensor is developed by using the characteristics of ultrasonic waves. The sound wave emitted by the sonar sensor can only work underwater, and cannot work above the water surface, the sonar sensor of the application is fixed on the lower side of the float and immersed in the water, and the sonar sensor is used for detecting the cross section of the water. The sonar sensor rotates above the water surface and has no practical significance, and it is unnecessary to rotate 360 degrees. Since the sonar sensor is arranged below the water surface, it is necessary to scan the entire water surface more than 180 degrees, but it is unnecessary to use 360 degrees to meet the scanning range. By alternately rotating forward and backward, the continuous unidirectional rotation of the prior art can be avoided, the winding and damage of the sonar sensor cable can be avoided, and the conductive slip ring of the prior art is omitted. Since the conductive slip ring is omitted, the control module and the sensor driving device need to be enclosed in the waterproof shell, the sensor assembly can work directly in the water, the sensor needs to pass through the detected sewage medium, and the sensor of the prior art passes through multiple media.

[0014] Further, the sensor is connected with the control module through a connecting cable, the middle part of the connecting cable is coiled into a ring and sleeved on the sliding shaft sleeve, and when the sliding shaft sleeve rotates, the coiled ring of the connecting cable does not rotate 360 degrees. The connecting cable connected with the sensor is coiled on the sliding shaft sleeve, and the connecting cable is loose and tight during the forward and backward alternate rotation of the sensor, so that winding does not occur, and the reliable connection between the sensor and the control module is ensured, and the very troublesome conductive slip ring of the prior art is omitted.

[0015] Further, the waterproof shell plays a water isolation role, since the sensor is exposed to the water and rotates, only the water medium needs to be penetrated for detection, and the sensor does not need to take waterproof measures under multiple water depths.

[0016] The application is applied to the flow measurement of the water delivery pipe network, the distance measuring sensor is arranged in the space behind the waterproof shell, the probe of the distance measuring sensor is arranged above the water surface, in the case that the water level of the pipeline of the water delivery pipe network is not full, the space above the water surface is scanned by the distance measuring sensor to determine the diameter of the pipeline, the sonar sensor is used for scanning above the water surface, the water depth of the part above the pipeline deposition is measured by scanning through the sonar sensor, and the pipeline deposition layer is calculated, and the flow measurement in the case that the water level of the pipeline is not full is completed (the method for calculating the pipeline flow rate is a known and commonly used prior art).

[0017] The utility model discloses still can be used for the flow measurement of river and ditch, because the space above the water surface of river and ditch is infinite, use the underwater flow area of echo sounder sensor of the utility model to detect, use doppler sensor to scan flow velocity field, calculate the flow velocity of river and ditch, need not detect the space above the water surface (the method of calculating the flow velocity of river and ditch is the prior art of public knowledge).

[0018] The utility model discloses the beneficial effect has: under the premise of guaranteeing scanning all cross section of water, change the single direction 360 degrees continuous rotation of sensor in cross section of water into non - continuous rotation, and the sensor is in the non - continuous rotation of positive and negative alternation in the range of greater than 180 degrees less than 360 degrees, avoid the winding damage of sensor cable, adopt magnetic coupling to replace the conductive slip ring, only need to waterproof sealing to drive motor and control module, and sensor does not need to seal, improve the reliability, reduce the cost, the utility model discloses can be used for the scanning of river and ditch measurement and water delivery pipe network cross section of water, realize the accurate flow measurement of flow section. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is fluid section echo sounder scanning device structure schematic drawing for the utility model embodiment;

[0020] Figure 2 It is one pipeline inside echo sounder sensor small angle segmentation scanning schematic drawing and water surface above ranging sensor array structure layout schematic drawing for the utility model embodiment;

[0021] Figure 3 It is river echo sounder sensor small angle segmentation scanning schematic drawing for the utility model embodiment two;

[0022] Figure 4 It is river doppler sensor beam multi -point segmentation scanning schematic drawing for the utility model embodiment two;

[0023] Figure 5 It is sensor structure schematic drawing for the utility model embodiment two;

[0024] In the drawing: river water surface 1, float 2, fluid section echo sounder scanning device 3, control module 4, sensor assembly 5, sensor drive arrangement 6, sensor 7, steel plate 8, magnet support 9, magnet one 10, sliding shaft sleeve 11, connecting cable 12, waterproof shell 13, fixed shaft 14, rotating disc 15, magnet two 16, step motor 17, motor mounting plate 18, motor shaft 19, waterproof seal 20, sectorial array type ranging sensor 21, ranging sensor 22, water surface above ranging sensor positive and negative scanning and scanning area 23, underwater doppler beam segmentation scanning and scanning area 24 of river channel, drain pipe 25, river underwater doppler beam segmentation scanning and scanning area 26, echo sounder scanning area bottom silt 27, echo sounder sensor 28, doppler sensor 29. DETAILED DESCRIPTION

[0025] The utility model will be further explained by examples in combination with the drawings.

[0026] A kind of discontinuous unidirectional rotation's fluid section sonar scanning device, including control module 4, sensor assembly 5 and sensor driving device 6, sensor driving device 6 includes waterproof shell 13, rotating disc 15, step motor 17 and fixed shaft 14, waterproof shell 13 is separated into front space and rear space by motor mounting plate 18, step motor 17 is arranged in rear space and is filled with glue to form waterproof seal 20, motor shaft 19 of step motor 17 passes through motor mounting plate 18 and enters front space, rotating disc 15 is arranged on motor shaft 19, and magnet two 16 is arranged on rotating disc 15, and rotating disc 15 is arranged close to the front side inner wall of waterproof shell 13;Fixed shaft 14 is arranged on the front side outer wall of waterproof shell 13, and sensor assembly 5 is mounted on fixed shaft 14, and sensor assembly 5 includes sensor 7, magnet support 9 and sliding shaft sleeve 11, sliding shaft sleeve 11 is sleeved on fixed shaft 14, and magnet support 9 is arranged on sliding shaft sleeve 11, and magnet one 10 that magnet support 9 is magnetically coupled with magnet two 16 on rotating disc 15 is arranged on magnet support 9, and sensor 7 is fixed at the front end of sliding shaft sleeve 11;Motor shaft of step motor 17 drives rotating disc 15 close to the front side inner wall to rotate, and magnet two 16 on rotating disc 15 is magnetically coupled with magnet one 10 on magnet support 9 and is matched, and magnet support 9 and sliding shaft sleeve 11 outside the front side wall of waterproof shell 13 are driven to rotate around fixed shaft 14, and sensor 7 on sliding shaft sleeve 11 is rotated accordingly;The control module 4 is connected with step motor 17 and sensor 7;Step motor 17 is alternately and discontinuously rotated in the range greater than 180 degrees and less than 360 degrees, and sensor 7 is alternately and discontinuously rotated in the range greater than 180 degrees and less than 360 degrees in the water section.

[0027] The sensor 7 includes a sonar sensor that floats below the water surface.

[0028] The control module 4 is arranged in the rear space of the waterproof shell 13 together with the step motor 17, or is arranged outside the waterproof shell 13 and is connected with the step motor 17 and the sensor 7 in the waterproof shell 13 through a waterproof cable.

[0029] The sensor assembly 5 and the sensor driving device 6 are arranged below the floating body 2, the floating body 2 floats on the water surface, the sensor assembly 5 is located below the water surface, and the sensor 7 of the sensor assembly 5 is alternately and discontinuously rotated in the range greater than 180 degrees and less than 360 degrees in the water section below the floating body.

[0030] The sensor 7 is a sonar sensor. Alternatively, the sensor 7 is a combination of a sonar sensor and a Doppler sensor, the sonar sensor and the Doppler sensor are arranged together and are driven to rotate by the same sensor driving device; or the sonar sensor and the Doppler sensor are arranged separately and are driven to rotate by respective sensor driving devices.

[0031] The sonar sensor directly detects and identifies objects in water and the profile of the water bottom. The sonar sensor emits a sound wave signal, which is reflected back when encountering an object. The distance and position of the object are calculated based on the reflection time and wave type. The ultrasonic sensor is developed by using the characteristics of ultrasonic waves. The sound wave emitted by the sonar sensor can only work underwater and cannot work above water. The sonar sensor of the present application is fixed to the lower side of the float and immersed in water to detect the cross section of the water. It is not necessary to rotate above the water surface and it is not necessary to rotate 360 degrees. Since the sonar sensor is arranged below the water surface, it must be greater than 180 degrees to scan the entire water surface, but it is not necessary to use 360 degrees to meet the scanning range. By alternately rotating forward and backward, the continuous unidirectional rotation of the prior art can be avoided, the conductive slip ring of the prior art can be omitted, and the control module 4 and the sensor driving device 6 can be sealed in the waterproof shell 13. The sensor assembly 5 can work directly in water. The sensor needs to pass through the detected sewage medium to avoid the sensor passing through multiple media in the prior art.

[0032] The sensor 7 is connected to the control module 4 through the connecting cable 12. The middle part of the connecting cable 12 is coiled into a ring and sleeved on the sliding shaft sleeve 11. When the sliding shaft sleeve 11 rotates, the coiled ring of the connecting cable 12 does not rotate 360 degrees. The connecting cable 12 for connecting the sensor is coiled on the sliding shaft sleeve 11 for multiple turns. The connecting cable 12 is loose and tight during the forward and backward rotation of the sensor, and does not entangle, thereby ensuring the reliable connection between the sensor and the control module 4, and omitting the very troublesome conductive slip ring of the prior art.

[0033] The connecting cable can also be arranged at other positions between the sensor assembly and the sensor driving device.

[0034] The sliding shaft sleeve 11, the fixed shaft 14 and the motor shaft of the stepping motor 17 are coaxially arranged.

[0035] The number of the second magnet 16 on the rotating disc 15 is equal to the number of the first magnet 10 on the magnet support 9, and they are arranged in pairs and coupled by N and S poles. The plurality of first magnets 10 are arranged with N and S poles spaced apart on the magnet support 9, and the plurality of second magnets 16 are arranged with N and S poles spaced apart on the rotating disc 15.

[0036] The sensor 7 is fixed to the front end of the sliding sleeve 11 by a steel plate 8 with a central hole, the central hole of the steel plate 8 is fixed to the front end of the sliding sleeve 11, and the sensor 7 is fixed to the steel plate 8.

[0037] The waterproof shell 13 plays a water-proof role, and since the sensor is exposed to water rotation, only the water medium to be detected is needed, and the sensor does not need to take waterproof measures under water of any depth.

[0038] The utility model discloses a flow measurement of water delivery pipe network, the ranging sensor 22 is arranged in the space behind the waterproof shell 13, the probe of the ranging sensor 22 is arranged above the water surface, in the case that the water level of the water delivery pipe network pipeline is not full, the space above the water surface is scanned by the ranging sensor 22, and the pipeline diameter is determined;The sonar sensor is used for scanning above the water surface, the water depth of the part above the pipeline bottom silt is measured by scanning by the sonar sensor, and the pipeline silt layer is calculated, and then the flow measurement in the case that the water level of the pipeline is not full is completed (the method for calculating the pipeline flow rate is the known prior art).

[0039] The ranging sensor 22 is located on the floating body 2 floating on the water surface, the ranging sensor 22 is a fan-shaped array type ranging sensor 21, and is provided with a fan-shaped ranging sensor array, which performs graphic description on the limited space on the water surface.

[0040] The number of the array type ranging sensor is at least one.

[0041] The ranging sensor includes a radar, an ultrasonic ranging sensor, a laser ranging sensor and the like.

[0042] The utility model discloses a flow measurement of river and channel, since the space above the water surface is infinite, the sonar sensor of the utility model is used to detect the underwater flow area, the Doppler sensor is used to scan the flow velocity field, and the river and channel flow velocity is calculated, and the space above the water surface does not need to be detected (the method for calculating the river and channel flow velocity is the known prior art).

[0043] The Doppler sensor is a beam multi-point segmentation Doppler flow velocity sensor, the beam multi-point segmentation Doppler flow velocity sensor obtains the average flow velocity on the beam, and the sonar sensor scans the flow section, and the multi-point segmentation Doppler flow velocity sensor also performs all-around scanning on the flow velocity field of the whole flow section, so that the average flow velocity of the whole flow velocity field is obtained, and the accuracy of the river and channel flow measurement is realized.

[0044] In the embodiment, the waterproof shell 13 is installed at the lower part of the floating body 2, the control module 4 is sealed together with the stepping motor 17, and the control module can also be connected to the outside above the water surface through a waterproof cable.

[0045] The sensor assembly is arranged at the front of the sensor driving device, and the sensor driving device drives the sensor assembly through the water-proof magnetic coupling. The sensor 7 can be a sonar sensor or a combination of a sonar sensor and a Doppler sensor.

[0046] The stepping motor is installed in the water-proof housing 13 through the motor mounting plate, the fixed shaft is fixed outside the water-proof housing end cover axis, and the inside of the water-proof housing end cover axis is the rotating disc 15. The rotating disc 15 is matched with the pair of magnets 16 arranged at the NS pole interval, and the arrangement position of the magnets 16 corresponds to the position of the matched magnet 10 on the magnet support 9 of the sensor assembly 5. The rotating disc 15 is matched on the shaft 19 of the stepping motor and freely rotates under the driving of the stepping motor. The magnets 16 on the rotating disc 15 are coupled with the magnets 10 on the magnet support 9 of the sliding sleeve 11 on the fixed shaft outside the water-proof housing 13 through the magnetic field, so that the sensor is alternately rotated and scanned in the range greater than 180 degrees and less than 360 degrees under the driving of the stepping motor. The water-proof housing end cover plays a water-proof role, thereby realizing absolute water-proof, and the sensor exposed in water does not need to take water-proof measures no matter how deep it is under water.

[0047] The sonar sensor is digitized and divided in angle during operation, for example, the interval of the divided angle is 1.5 degrees, and the velocity measuring beam of the Doppler sensor is also digitized and divided, for example, the beam is automatically divided into not less than 1 point and at most 256 points according to the range size of the actual application occasion.

[0048] The cables are gathered in the water-proof housing 13 and are treated by the water-proof sealing 20.

[0049] Embodiment one, refer to the attached Figure 1 、 2 In the case of low water level, the upper part of the pipeline above the water surface has a limited space; the part of the floating body 2 above the water surface is matched with the fan-shaped ranging sensor array 21, the ranging sensor 22 of which is an acoustic ranging sensor, a radar ranging sensor or a laser ranging sensor for scanning, which is used for graphically describing the limited space above the water surface.

[0050] The attached Figure 2 The ranging sensor above the water surface is labeled as forward and reverse scanning and scanning area 23, the sonar sensor below the water surface is labeled as forward and reverse small angle division scanning and scanning area 24, the drainage pipeline 25 and the sonar scanning area bottom silt 27.

[0051] Embodiment two, refer to the attached Figure 1 、 3, 4, 5, for river flow detection, because the space above the river surface is infinite, the sonar sensor 28 of the utility model detects the underwater flow area, the Doppler sensor 29 scans the flow field, calculates the river flow rate, and does not need to detect the space above the water surface. Because the sonar sensor 28 is fixed on the lower side of the float and is immersed in water, the sonar sensor 28 only works underwater, and the part exceeding the water surface does not work, because there is a float above, so the part below the water surface does not reach 360 degrees, and because the sensor 7 is below the float, the arrangement position of the sonar sensor 28 is lower than the water surface, so the scanning range must be greater than 180 degrees to scan the entire water surface, but 360 degrees is not needed to meet the scanning range.

[0052] Refer to the attached drawings Figure 3 , 4 , the sonar sensor below the water surface positive and negative small angle segmentation scanning and scanning area 24, river underwater Doppler beam segmentation scanning and scanning area 26, sonar scanning area bottom siltation 27.

[0053] Refer to the attached drawings Figure 5 The sensor 7 is the combination of the sonar sensor 28 and the Doppler sensor 29, the sonar sensor 28 and the Doppler sensor 29 are arranged together and are driven to rotate through the same set of sensor driving devices.

Claims

1. A non-continuous unidirectional rotating fluid section sonar scanning device, characterized by: The application relates to a sensor driving device and a sensor assembly, and belongs to the field of water quality monitoring.

2. A non-continuous unidirectional rotating fluid section sonar scanning apparatus according to claim 1, characterized in that: The sensor driving device comprises a control module (4), a sensor assembly (5) and a sensor driving device (6), the sensor driving device (6) comprises a waterproof shell (13), a rotating disc (15), a stepping motor (17) and a fixed shaft (14), the waterproof shell (13) is divided into a front space and a rear space by a motor mounting plate (18), the stepping motor (17) is arranged in the rear space and is filled with glue to form a waterproof seal (20), a motor shaft (19) of the stepping motor (17) penetrates through the motor mounting plate (18) and enters the front space, the rotating disc (15) is arranged on the motor shaft (19), a magnet II (16) is arranged on the rotating disc (15), and the rotating disc (15) is arranged close to the front inner wall of the waterproof shell (13); a fixed shaft (14) is arranged on the front outer wall of the waterproof shell (13), the sensor assembly (5) is mounted on the fixed shaft (14), the sensor assembly (5) comprises a sensor (7), a magnet support (9) and a sliding shaft sleeve (11), the sliding shaft sleeve (11) is sleeved on the fixed shaft (14), the magnet support (9) is arranged on the sliding shaft sleeve (11), a magnet I (10) that is magnetically coupled with the magnet II (16) on the rotating disc (15) is arranged on the magnet support (9), and the sensor (7) is fixed to the front end of the sliding shaft sleeve (11); the motor shaft of the stepping motor (17) drives the rotating disc (15) close to the front inner wall to rotate, the magnet II (16) on the rotating disc (15) is matched with the magnet I (10) on the magnet support (9) through magnetic coupling, the magnet support (9) and the sliding shaft sleeve (11) outside the front wall of the waterproof shell (13) are driven to rotate around the fixed shaft (14), and the sensor (7) on the sliding shaft sleeve (11) rotates accordingly; the control module (4) is connected with the stepping motor (17) and the sensor (7); the stepping motor (17) is alternately and discontinuously rotated in a range greater than 180 degrees and less than 360 degrees, and the sensor (7) is alternately and continuously rotated in a range greater than 180 degrees and less than 360 degrees in the water section.

3. A non-continuous unidirectional rotating fluid section sonar scanning apparatus according to claim 1 or 2, characterized in that: The sensor (7) comprises a sonar sensor.

4. A non-continuous unidirectional rotating fluid section sonar scanning apparatus according to claim 1 or 2, characterized in that: The control module (4) is arranged in the rear space of the waterproof shell (13) together with the stepping motor (17).

5. A non-continuous unidirectional rotating fluid section sonar scanning apparatus according to claim 1 or 2, characterized in that: The control module (4) is arranged outside the waterproof shell (13) and is connected with the stepping motor (17) and the sensor (7) in the waterproof shell (13) through a waterproof cable.

6. A non-continuous unidirectional rotating fluid section sonar scanning apparatus according to claim 1 or 2, characterized in that: The sensor assembly (5) and the sensor driving device (6) are arranged below a floating body (2), the floating body (2) floats on the water surface, and the sensor assembly (5) is located below the water surface.

7. A non-continuous unidirectional rotating fluid section sonar scanning apparatus according to claim 1 or 2, characterized in that: The sensor (7) is a combination of a sonar sensor and a Doppler sensor; the sonar sensor and the Doppler sensor are arranged together and are driven to rotate through the same set of sensor driving devices. The sensor (7) is connected with the control module (4) through a connecting cable (12), a middle portion of the connecting cable (12) is coiled into a ring and is sleeved on the sliding shaft sleeve (11), and when the sliding shaft sleeve (11) rotates, the coiled ring of the connecting cable (12) does not rotate by 360 degrees.

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