A water level measuring device for bridge construction

Abstract

The present invention belongs to the field of water level measurement technology, and in particular relates to a water level measurement device for bridge construction, comprising a mounting plate and a radar probe arranged on one side of the mounting plate, an industrial control board with a wireless communication module installed at the bottom of the mounting plate, and further comprising: a fixing seat, the fixing seat being arranged on one side of the mounting plate, and the radar probe being fixedly inserted into the end face of the fixing seat, one end of the fixing seat being installed with a support shaft; and an intermediate seat being arranged between the support shaft and the mounting plate. The present invention can reduce the impact vibration force of strong winds and raindrops on the radar probe, improve its working reliability and reduce the possibility of damage, and can automatically adjust the water level measurement frequency based on the vibration duration, taking into account both the measurement efficiency in normal weather and the measurement efficiency in bad weather. At the same time, it can also automatically estimate the calibration time to ensure timely calibration and guarantee the accuracy of water level measurement.

Description

Technical Field

[0001] The invention belongs to the technical field of water level measurement, and in particular relates to water level measurement equipment for bridge construction. Background Art

[0002] Accurate water level measurement is required during bridge construction, as the water level directly affects the bridge span design, foundation depth, and flood resistance level. Navigation clearance and structural flood resistance must be guaranteed when the water level is high, while low water levels are related to foundation construction safety. Real-time monitoring can optimize construction plans, avoid risks, and ensure the safety of bridge construction.

[0003] Currently, there are many types of water level measurement equipment, the most common of which are non-contact and contact types. Since non-contact equipment does not require contact with the water body, it is less affected by water erosion, impact of floating objects, etc., has low maintenance costs, and can avoid corrosion and blockage caused by contact. It can quickly obtain data and is suitable for harsh environments and dangerous waters. It is widely used in bridge construction, hydrological monitoring and other fields. For example, patent announcement number CN219551641U discloses an intelligent radar water level meter; the radar water level meter can quickly measure the water level by emitting electromagnetic waves and calculating the time required to receive the electromagnetic waves reflected by the water surface;

[0004] However, during bridge construction, due to the wide river surface and the lack of obstructions on the water surface, the radar water level gauge is susceptible to the "narrow channel effect" formed by the banks on both sides. Therefore, in weather conditions such as strong winds and heavy rain, the radar water level gauge is susceptible to the impact of airflow along the river direction and the impact of raindrops. These impact forces can easily affect the service life of the internal components of the radar water level gauge (such as the crystal oscillator. Continuous vibration may cause slight displacement or damage to its internal structure, gradually losing the original frequency stability or signal transmission efficiency). Secondly, the radar water level gauge generally has a fixed frequency for measuring water level, and the measurement interval is pre-determined by the staff, such as measuring every 5 minutes. However, in weather conditions such as strong winds and heavy rain, the water level changes rapidly, and the flexibility of measuring water level at a fixed frequency is poor, resulting in poor performance. Summary of the Invention

[0005] The purpose of the present invention is to provide a water level measuring device for bridge construction in view of the above problems.

[0006] To achieve the above-mentioned object, the present invention adopts the following technical solution: a water level measuring device for bridge construction, comprising a mounting plate and a radar probe arranged on one side of the mounting plate, an industrial control board with a wireless communication module mounted on the bottom of the mounting plate, and further comprising:

[0007] A fixing seat is provided on one side of the mounting plate, and the radar probe is fixedly inserted into the end surface of the fixing seat, and a support shaft is installed at one end of the fixing seat;

[0008] An intermediate seat is provided between the support shaft and the mounting plate, the mounting plate being provided with a horizontal telescopic unit and connected to the intermediate seat via the horizontal telescopic unit;

[0009] A rotating sleeve is fixedly mounted on the side wall of the intermediate seat, and a support shaft is rotatably arranged inside the rotating sleeve;

[0010] The frequency adjustment unit is arranged inside the mounting plate and the rotating sleeve, and the frequency adjustment unit feeds back an electrical signal to the industrial control board according to the duration of the rotation and horizontal movement of the radar probe.

[0011] Preferably, the horizontal telescopic unit includes a square plate fixedly mounted on the end of the mounting plate, the side wall of the square plate is slidably connected to a movable frame, a groove is provided at one end of the mounting plate close to the square plate, one end of the movable frame extends to the inside of the groove, and the other end of the movable frame is fixedly connected to the side wall of the middle seat, a group of damping springs are fixedly arranged between the square plate and the middle seat, and a horizontal fixing mechanism is installed inside the groove.

[0012] Preferably, the frequency adjustment unit includes a first target shaft fixedly mounted on the top of the movable frame, the upper groove wall of the groove is provided with a strip groove, and a first proximity switch is fixedly mounted inside the strip groove, a second target shaft is fixedly mounted at an eccentric position of one end of the support shaft, a circular plate is fixedly mounted inside the rotating sleeve, and a second proximity switch corresponding to the position of the second target shaft is mounted on the side wall of the circular plate, two timers are fixedly mounted on the side wall of the intermediate seat, when the first target shaft is coaxial with the first proximity switch, and when the second target shaft is coaxial with the second proximity switch, the first proximity switch and the second proximity switch will both feedback electrical signals to the industrial control board, and the industrial control board controls the corresponding timer to work according to the electrical signals fed back by the first proximity switch and the second proximity switch, and an angle fixing mechanism is mounted on the side wall of the circular plate.

[0013] Preferably, the horizontal fixing mechanism includes an electric push rod fixedly inserted into the groove wall, the interior of the groove is slidably connected to a pushing plate, and the pushing plate is fixedly installed at the movable end of the electric push rod.

[0014] Preferably, the angle fixing mechanism includes a reduction motor fixedly mounted on the side wall of the circular plate, the output shaft of the reduction motor is rotatably connected to the side wall of the circular plate, an electromagnetic clutch is fixedly mounted on the end of the support shaft, and the output shaft of the reduction motor is transmission-connected to the electromagnetic clutch, an inclination sensor is mounted on the end of the fixed seat, and the reduction motor, electromagnetic clutch and inclination sensor are all electrically connected to the industrial control board.

[0015] Preferably, an encoder is fixedly mounted on the side wall of the circular plate, and a counter is fixedly mounted on the side wall of the middle seat. The encoder converts the number of rotations of the output shaft of the reduction motor into a pulse signal and feeds it back to the counter. The encoder and the counter are both electrically connected to the industrial control board, and the industrial control board controls the output power of the reduction motor according to the timing information of the two timers.

[0016] Preferably, a humidity detection probe is fixedly installed on the end surface of the fixing seat, and the industrial control board controls the operation of the radar probe, the horizontal fixing mechanism and the angle fixing mechanism according to the electrical signal fed back by the humidity detection probe.

[0017] Preferably, the side wall of the fixing seat is provided with an arc-shaped limiting groove, the end of the rotating sleeve is fixedly installed with a limiting column, and the limiting column is slidably connected to the arc-shaped limiting groove, and arc-shaped rubber buffer pads are fixedly installed on both sides of the inner side of the arc-shaped limiting groove.

[0018] Compared with existing technologies, the advantages of a water level measurement device for bridge construction are:

[0019] 1. Through the coordinated cooperation of the mounting plate, radar probe, industrial control board, fixing base, support shaft, intermediate base, horizontal telescopic unit and rotating sleeve, the radar probe can be telescoped and displaced in the horizontal direction and can be deflected within a specific angle range. This design can, to a certain extent, reduce the impact and vibration force of strong winds and raindrops on the radar probe, helping to improve its working reliability and reduce the risk of damage.

[0020] 2. By setting up a frequency adjustment unit, the radar probe's water level measurement frequency can be automatically adjusted based on the duration of vibration to which the radar probe is subjected, thereby reducing the radar probe's water level measurement frequency in normal weather and ensuring that the radar probe maintains a sufficiently high water level measurement frequency in severe weather.

[0021] 3. Through the cooperation of the encoder and counter, the time for calibrating the radar probe can be automatically estimated based on the vibration duration of the radar probe, ensuring that the radar probe is calibrated in time, thereby ensuring the accuracy of the radar probe in measuring water level as much as possible. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a structural diagram of a water level measuring device for bridge construction provided by the present invention;

[0023] Figure 2 This is a schematic diagram of the internal structure of a mounting plate of a water level measuring device for bridge construction provided by the present invention;

[0024] Figure 3 This is a schematic diagram of the internal structure of a rotating sleeve of a water level measuring device for bridge construction provided by the present invention;

[0025] Figure 4 yes Figure 3 A magnified view of the structure of part A;

[0026] Figure 5 This is a schematic diagram of the position of an arc-shaped limit groove of a water level measuring device for bridge construction provided by the present invention.

[0027] In the figure: 1 mounting plate, 2 radar probe, 3 industrial control board, 4 fixing seat, 5 support shaft, 6 intermediate seat, 7 horizontal telescopic unit, 71 square plate, 72 movable frame, 73 groove, 74 damping spring, 8 rotating sleeve, 9 frequency adjustment unit, 91 first target axis, 92 strip groove, 93 first proximity switch, 94 second target axis, 95 circular plate, 96 second proximity switch, 97 timer, 10 horizontal fixing mechanism, 101 electric push rod, 102 pushing plate, 11 angle fixing mechanism, 111 reduction motor, 112 electromagnetic clutch, 113 tilt sensor, 12 encoder, 13 counter, 14 humidity detection probe, 15 arc-shaped limit groove, 16 limit column, 17 arc-shaped rubber buffer pad. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0029] like Figure 1-Figure 5As shown, a water level measuring device for bridge construction includes a mounting plate 1 and a radar probe 2 arranged on one side of the mounting plate 1, an industrial control board 3 with a wireless communication module is installed at the bottom of the mounting plate 1, and also includes: a fixing seat 4, the fixing seat 4 is arranged on one side of the mounting plate 1, and the radar probe 2 is fixedly inserted on the end face of the fixing seat 4, a support shaft 5 is installed at one end of the fixing seat 4, an intermediate seat 6 is arranged between the support shaft 5 and the mounting plate 1, the mounting plate 1 is installed with a horizontal telescopic unit 7, and is connected to the intermediate seat 6 through the horizontal telescopic unit 7, the horizontal telescopic unit 7 includes a square plate 71 fixedly mounted on the end of the mounting plate 1, the side wall of the square plate 71 is slidably connected to a movable frame 72, and a groove 73 is provided at one end of the mounting plate 1 close to the square plate 71. One end of the frame 72 extends to the inside of the groove 73, and the other end of the movable frame 72 is fixedly connected to the side wall of the middle seat 6. A group of damping springs 74 are fixedly arranged between the square plate 71 and the middle seat 6. A horizontal fixing mechanism 10 is installed inside the groove 73. The horizontal fixing mechanism 10 includes an electric push rod 101 fixedly inserted into the groove wall of the groove 73. A pushing plate 102 is slidably connected to the inside of the groove 73, and the pushing plate 102 is fixedly installed at the movable end of the electric push rod 101. The horizontal position of the movable frame 72 can be pushed and fixed by the electric push rod 101 and the pushing plate 102. A flexible sealing sleeve (not shown in the figure) is provided between the square plate 71 and the middle seat 6, and the damping springs 74 and the like are all arranged inside the flexible sealing sleeve.

[0030] The rotating sleeve 8 is fixedly mounted on the side wall of the middle seat 6, and the support shaft 5 is rotatably arranged inside the rotating sleeve 8. The frequency adjustment unit 9 is arranged inside the mounting plate 1 and the rotating sleeve 8. The frequency adjustment unit 9 feeds back an electrical signal to the industrial control board 3 according to the duration of rotation and horizontal movement of the radar probe 2. The frequency adjustment unit 9 includes a first target shaft 91 fixedly mounted on the top of the movable frame 72, a strip groove 92 is provided on the upper groove wall of the groove 73, and a first proximity switch 93 is fixedly installed inside the strip groove 92. A second target shaft 94 is fixedly installed at the eccentric position of one end of the support shaft 5, a circular plate 95 is fixedly installed inside the rotating sleeve 8, and a side wall of the circular plate 95 is installed with a position corresponding to the second target shaft 94. The second proximity switch 96 and the side wall of the middle seat 6 are fixedly installed with two timers 97. When the first target axis 91 is coaxial with the first proximity switch 93, and when the second target axis 94 is coaxial with the second proximity switch 96, the first proximity switch 93 and the second proximity switch 96 will both feedback electrical signals to the industrial control board 3, and the industrial control board 3 controls the corresponding timer 97 to work according to the electrical signals feedback from the first proximity switch 93 and the second proximity switch 96. The side wall of the circular plate 95 is installed with an angle fixing mechanism 11. When the first target axis 91 and the first proximity switch 93, and the second target axis 94 and the second proximity switch 96 are offset, it means that the radar probe 2 is subjected to external force and rotates or shifts horizontally.

[0031] The angle fixing mechanism 11 includes a reduction motor 111 fixedly mounted on the side wall of the circular plate 95. The output shaft of the reduction motor 111 is rotatably connected to the side wall of the circular plate 95. An electromagnetic clutch 112 is fixedly mounted on the end of the support shaft 5, and the output shaft of the reduction motor 111 is transmission-connected to the electromagnetic clutch 112. An inclination sensor 113 is mounted on the end of the fixed seat 4. The reduction motor 111, the electromagnetic clutch 112 and the inclination sensor 113 are all electrically connected to the industrial control board 3. The inclination sensor 113 can detect the tilt deflection angle of the fixed seat 4 and feed back the deflection angle to the industrial control board 3.

[0032] An encoder 12 is fixedly installed on the side wall of the circular plate 95, and a counter 13 is fixedly installed on the side wall of the middle seat 6. The encoder 12 converts the number of rotations of the output shaft of the reduction motor 111 into a pulse signal and feeds it back to the counter 13. The encoder 12 and the counter 13 are both electrically connected to the industrial control board 3. The industrial control board 3 controls the output power of the reduction motor 111 according to the timing information of the two timers 97, so that the calibration time interval of the radar probe 2 can be roughly estimated based on the vibration duration.

[0033] A humidity detection probe 14 is fixedly installed on the end face of the fixing seat 4. The industrial control board 3 controls the operation of the radar probe 2, the horizontal fixing mechanism 10 and the angle fixing mechanism 11 according to the electrical signal feedback from the humidity detection probe 14. The humidity detection probe 14 can detect the air humidity and feedback an electrical signal to the industrial control board 3 when the humidity exceeds the threshold.

[0034] An arc-shaped limit groove 15 is provided on the side wall of the fixing seat 4, and a limit column 16 is fixedly installed on the end of the rotating sleeve 8, and the limit column 16 is slidably connected to the arc-shaped limit groove 15. Arc-shaped rubber buffer pads 17 are fixedly installed on both sides of the inner side of the arc-shaped limit groove 15. The arc-shaped limit groove 15 can prevent the fixing seat 4 from rotating too much, thereby preventing the cable of the radar probe 2 from being excessively twisted.

[0035] The operating principle of the present invention is described as follows: the mounting plate 1 is mounted on a bracket, and the bracket is fixed to a suitable location on the shore of the bridge construction area, so that the mounting plate 1 is above the water level measurement position (the water level measurement position needs to remain stable and unobstructed, avoiding obstruction of the radar beam by shore obstacles, and ensuring that this position can continuously cover the key waters required for monitoring during bridge construction, such as near the pier foundation, while avoiding measurement point deviation caused by water scouring and bank slope settlement, to ensure the consistency and accuracy of long-term measurements). Then, the industrial control board 3 is connected to the power supply line (photovoltaic panels can also be installed on the bracket to power the industrial control board 3 through the photovoltaic panels, saving energy and reducing consumption).

[0036] The staff can pre-set the measurement frequency of the radar probe 2 through a remote control terminal (such as a mobile phone), for example, once every 5 minutes, and the industrial control board 3 will start the water level measurement work according to the measurement frequency. When measuring the water level, the industrial control board 3 will control the radar probe 2 to work. The radar probe 2 emits electromagnetic waves to the water surface and calculates the time required to receive the electromagnetic waves reflected by the water surface. The water level can be quickly measured, and the industrial control board 3 will send the water level information to the remote control terminal through the wireless communication module.

[0037] Among them, when encountering strong winds, heavy rain and other weather conditions, when airflow or rain falls on the fixing seat 4 and the radar probe 2, they are impacted by the airflow or rain. Since the fixing seat 4 is rotatably connected to the rotating sleeve 8 through the support shaft 5, the fixing seat 4 can rotate, so the radar probe 2 can be deflected along the direction of the impact force with the fixing seat 4, thereby reducing the impact force of the airflow or rain on the radar probe 2. Secondly, since the intermediate seat 6 can be displaced in the horizontal direction of the mounting plate 1 by the movable frame 72, the horizontally displaceable space can be combined with the deflection to further reduce the vibration force of the radar probe 2 caused by the impact of airflow or rain. Since a damping spring 74 is arranged between the intermediate seat 6 and the square plate 71, while ensuring that the intermediate seat 6 can be moved horizontally, the damping characteristics of the damping spring 74 can be used to avoid the radar probe 2 from being moved horizontally. Excessive displacement or continuous vibration occurs in the horizontal direction (when the impact force causes the middle seat 6 to displace, the damping spring 74 can quickly absorb the vibration energy, so that the middle seat 6 quickly returns to a stable state, reducing mechanical fatigue and damage to electronic components caused by repeated shaking), and the limiting column 16 at the end of the rotating sleeve 8 cooperates with the arc-shaped limiting groove 15, and arc-shaped rubber buffer pads 17 are installed on both sides of the inner side of the arc-shaped limiting groove 15. Therefore, in the rotation direction, when the limiting column 16 reaches both sides of the arc-shaped limiting groove 15, it will contact and collide with the arc-shaped rubber buffer pads 17. The arc-shaped rubber buffer pads 17 absorb the impact force through their own elastic deformation, slowing down the rotational inertia of the fixing seat 4 and the radar probe 2, and avoiding damage due to excessive rotation and impacting the bracket. At the same time, the damping characteristics of the arc-shaped rubber buffer pads 17 can effectively suppress the rebound oscillation after rotation, so that the radar probe 2 can quickly return to a stable measurement posture;

[0038] When the intermediate seat 6 is horizontally displaced, the intermediate seat 6 will drive the movable frame 72 to move synchronously. At this time, the positions of the first target axis 91 and the first proximity switch 93 are staggered (that is, they cannot maintain a coaxial state). At this time, the first proximity switch 93 does not detect the first target axis 91, so the electrical signal fed back by the first proximity switch 93 to the industrial control board 3 is disconnected. At this time, the industrial control board 3 will immediately control the corresponding timer 97 to perform timing work. Similarly, when the support shaft 5 rotates, the second proximity switch 96 and the second target axis 94 will also be staggered. At this time, the corresponding timer 97 will also perform timing work. The industrial control board 3 will rotate every 1 minute. The clock collects the timing information of the two timers 97 and adds up the timing duration of the two timers 97. Every time the total duration exceeds a certain time, the industrial control board 3 controls the water level measurement working frequency to increase by a certain value. For example, when the total duration reaches 10 seconds, the corresponding water level measurement working frequency is A1, and when the total duration reaches 20 seconds, the corresponding water level measurement working frequency is A2 (the total duration of 10 seconds, the working frequencies A1 and A2, etc. are all set by the staff through the remote control terminal to ensure that the water level measurement working frequency is increased in severe weather such as strong winds and heavy rain to ensure the timeliness of water level measurement);

[0039] Secondly, when the humidity detection probe 14 detects that the air humidity exceeds the threshold range, the humidity detection probe 14 will feedback an electrical signal to the industrial control board 3. At this time, the industrial control board 3 will immediately start a water level measurement and shorten the water level measurement frequency (this measurement frequency is also pre-set by the staff through the remote control terminal). Therefore, when the impact of rainwater on components such as the fixing base 4 and the radar probe 2 is relatively small, the radar probe 2 can still maintain a sufficiently high water level measurement frequency to ensure the timeliness of water level measurement (the threshold of the humidity detection probe 14 can be set according to factors such as the installation height of the radar probe 2 and is generally set to 95%).

[0040] Every time the industrial control board 3 starts the water level measurement work, the industrial control board 3 will control the electric push rod 101 to work, and the electric push rod 101 will push the movable frame 72 to move away from the mounting plate 1 through the squeezing plate 102. The electric push rod 101 will stop working after working for 5 seconds. At this time, the side wall of the movable frame 72 located inside the groove 73 is against the side wall of the square plate 71 to ensure its stability in the horizontal direction. At the same time, the industrial control board 3 will control the electromagnetic clutch 112 to work. At this time, the moving plate and the static plate of the electromagnetic clutch 112 are attracted to each other through the armature. At the same time, the industrial control board 3 will The inclination information fed back by the inclination sensor 113 controls the operation of the reduction motor 111. At this time, the reduction motor 111 drives the support shaft 5 to rotate in the opposite direction of the inclination of the radar probe 2 through the electromagnetic clutch 112. When the inclination sensor 113 detects that the inclination angle has returned to zero, the industrial control board 3 controls the reduction motor 111 to stop working. At this time, the reduction motor 111 and the electric push rod 101 are used to forcibly fix the position of the radar probe 2 to prevent the position deviation of the radar probe 2 from affecting the accuracy of the water level measurement (the reduction motor 111 has a self-locking structure. After it stops working, its output shaft will not rotate);

[0041] Among them, when the industrial control board 3 is not performing water level measurement, the industrial control board 3 will control the reduction motor 111 to work at a constant speed, and the industrial control board 3 will start the encoder 12 to work. The encoder 12 can convert the number of rotations of the output shaft of the reduction motor 111 into a pulse signal and feed it back to the counter 13. The counter 13 will count according to the pulse signal. After the count reaches the set value, the encoder 12 will feed back an electrical signal to the industrial control board 3, and the industrial control board 3 will send a prompt message to the remote control terminal. The staff should calibrate the radar probe 2 in time (the oscillator, timing module, signal amplifier and other electronic components inside the radar probe 2 will have slight parameter drift over time, resulting in time measurement errors. Calibration can ensure that the radar maintains accurate measurement capabilities). When the probe 2 vibrates, the two timers 97 will perform corresponding timing. After the industrial control board 3 calculates the total timing time of the two timers 97 each time, after performing a water level measurement, the industrial control board 3 will control the output power of the reduction motor 111 according to the current total timing time. Every time a certain time is exceeded, the output power of the reduction motor 111 increases by 10%, and the maximum output power of the reduction motor 111 will not exceed. After the radar probe 2 is vibrated, the possibility of parameter drift of its internal components increases, and the calibration time needs to be shortened. Therefore, by regulating the output power of the reduction motor 111 according to the total timing time, the output frequency of the pulse signal of the encoder 12 can be regulated, so that the calibration time of the radar probe 2 can be roughly estimated and shortened according to the vibration duration.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A water level measuring device for bridge construction, comprising a mounting plate (1) and a radar probe (2) arranged on one side of the mounting plate (1), wherein an industrial control board (3) having a wireless communication module is installed at the bottom of the mounting plate (1), characterized in that: Also includes: A fixing seat (4) is provided on one side of the mounting plate (1), and the radar probe (2) is fixedly inserted into the end surface of the fixing seat (4), and a support shaft (5) is installed at one end of the fixing seat (4); An intermediate seat (6) is arranged between the support shaft (5) and the mounting plate (1); the mounting plate (1) is equipped with a horizontal telescopic unit (7) and is connected to the intermediate seat (6) via the horizontal telescopic unit (7); A rotating sleeve (8) is fixedly mounted on the side wall of the intermediate seat (6), and the support shaft (5) is rotatably arranged inside the rotating sleeve (8); A frequency adjustment unit (9) is arranged inside the mounting plate (1) and the rotating sleeve (8), and the frequency adjustment unit (9) feeds back an electrical signal to the industrial control board (3) according to the duration of the rotation and horizontal movement of the radar probe (2); The horizontal telescopic unit (7) includes a square plate (71) fixedly mounted on the end of the mounting plate (1), a side wall of the square plate (71) is slidably connected to a movable frame (72), an end of the mounting plate (1) close to the square plate (71) is provided with a groove (73), one end of the movable frame (72) extends into the interior of the groove (73), and the other end of the movable frame (72) is fixedly connected to the side wall of the intermediate seat (6), a group of damping springs (74) are fixedly arranged between the square plate (71) and the intermediate seat (6), and a horizontal fixing mechanism (10) is installed inside the groove (73); The frequency adjustment unit (9) includes a first target shaft (91) fixedly mounted on the top of the movable frame (72), a strip groove (92) is provided on the upper groove wall of the groove (73), and a first proximity switch (93) is fixedly mounted inside the strip groove (92), a second target shaft (94) is fixedly mounted at an eccentric position at one end of the support shaft (5), a circular plate (95) is fixedly mounted inside the rotating sleeve (8), and a second proximity switch (96) corresponding to the position of the second target shaft (94) is mounted on the side wall of the circular plate (95), and the intermediate seat Two timers (97) are fixedly installed on the side wall of (6). When the first target axis (91) is coaxial with the first proximity switch (93), and when the second target axis (94) is coaxial with the second proximity switch (96), the first proximity switch (93) and the second proximity switch (96) will both feedback electrical signals to the industrial control board (3), and the industrial control board (3) controls the corresponding timer (97) to work according to the electrical signals fed back by the first proximity switch (93) and the second proximity switch (96). An angle fixing mechanism (11) is installed on the side wall of the circular plate (95).

2. The water level measuring device for bridge construction according to claim 1, characterized in that: The horizontal fixing mechanism (10) comprises an electric push rod (101) fixedly inserted into the groove wall of the groove (73); a pushing plate (102) is slidably connected to the interior of the groove (73), and the pushing plate (102) is fixedly mounted at the movable end of the electric push rod (101).

3. The water level measuring device for bridge construction according to claim 1, characterized in that: The angle fixing mechanism (11) includes a reduction motor (111) fixedly mounted on the side wall of the circular plate (95), the output shaft of the reduction motor (111) being rotatably connected to the side wall of the circular plate (95), an electromagnetic clutch (112) being fixedly mounted on the end of the support shaft (5), and the output shaft of the reduction motor (111) being transmission-connected to the electromagnetic clutch (112), an inclination sensor (113) being mounted on the end of the fixing seat (4), and the reduction motor (111), the electromagnetic clutch (112) and the inclination sensor (113) being electrically connected to the industrial control board (3).

4. The water level measuring device for bridge construction according to claim 3, characterized in that: An encoder (12) is fixedly mounted on the side wall of the circular plate (95), and a counter (13) is fixedly mounted on the side wall of the intermediate seat (6). The encoder (12) converts the number of revolutions of the output shaft of the reduction motor (111) into a pulse signal and feeds it back to the counter (13). Both the encoder (12) and the counter (13) are electrically connected to the industrial control board (3). The industrial control board (3) controls the output power of the reduction motor (111) according to the timing information of the two timers (97).

5. The water level measuring device for bridge construction according to claim 1, characterized in that: A humidity detection probe (14) is fixedly installed on the end surface of the fixing seat (4), and the industrial control board (3) controls the operation of the radar probe (2), the horizontal fixing mechanism (10) and the angle fixing mechanism (11) according to the electrical signal fed back by the humidity detection probe (14).

6. The water level measuring device for bridge construction according to claim 1, characterized in that: The side wall of the fixing seat (4) is provided with an arc-shaped limiting groove (15), the end of the rotating sleeve (8) is fixedly mounted with a limiting column (16), and the limiting column (16) is slidably connected to the arc-shaped limiting groove (15), and arc-shaped rubber buffer pads (17) are fixedly mounted on both sides of the interior of the arc-shaped limiting groove (15).

Images