CN111678568A - Water level monitoring device for water conservancy projects - Google Patents

Abstract

The invention relates to a water level monitoring device for a water conservancy project, comprising a sliding rod, the bottom end of the sliding rod is threaded with a limit chassis, the top of the sliding rod is fixedly provided with a top limiting block, and the sliding rods are respectively provided with a floating block and a mounting block. , a monitoring box with an open bottom is installed on the installation block, a battery and a monitoring module are respectively arranged inside the monitoring box, and the monitoring modules respectively include a distance sensing unit, a processing unit connected with the sensing distance unit, and an alarm unit connected with the processing unit , a rainproof cover is also provided at the top of the top limit block, at least one vertically arranged vertical telescopic rod is connected to the bottom end of the rainproof cover, and a second fastening knob is arranged on the vertical telescopic rod, At the same time, the bottom end of the vertical telescopic rod is also fixedly provided with a stopper. By adopting the above structure, the present invention can effectively monitor the water level of the water body and actively issue a warning reminder, thereby greatly improving its own use performance and application range.

Description

Water level monitoring device for water conservancy projects

technical field

The invention relates to a water level monitoring device for a water conservancy project.

Background technique

In the process of monitoring water conservancy projects, water level monitoring is one of the indispensable and important links. The water level monitoring work is mainly to monitor the water depth of water bodies in dams, canals, rivers, etc. At present, water level monitoring mostly adopts methods such as setting benchmarks or marking the water level warning line on the inclined wall of the dam body to warn the current water level. The structures of the devices used are relatively simple, but at the same time, the problem is that during the monitoring process, when the water level of the water body reaches the warning level, neither of these two methods can automatically (or actively) issue a warning to the staff. As a reminder, the staff must frequently check the water level of the water body regularly, which not only greatly increases the workload of the staff, but also cannot quickly and timely find the location exceeding the warning water level and carry out follow-up treatment, so it is impossible to Meet and better meet current water level monitoring needs.

SUMMARY OF THE INVENTION

In order to overcome the above deficiencies of the prior art, the technical problem to be solved by the present invention is to provide a water level monitoring device for water conservancy projects that can effectively monitor the water level of the water body and actively send out warnings, thereby greatly improving its own performance.

The technical scheme of the present invention is:

A water level monitoring device for a water conservancy project comprises a vertically arranged sliding rod, a circular limit chassis is threaded on the bottom end of the sliding rod, and a bottom inner threaded hole is opened in the bottom center of the limit chassis, A top stop block is fixed on the top of the sliding rod, and a floating block and a mounting block are respectively slidably sleeved on the sliding rod. The mounting block is located above the floating block, and is located on the The mounting block is also provided with a first tightening knob;

A monitoring box with an open bottom end is also installed on the mounting block, and a battery for power supply and a monitoring module for monitoring the distance between the monitoring box and the floating block are respectively provided inside the monitoring box, The monitoring modules respectively include a distance sensing unit, a processing unit connected with the sensing distance unit, and an alarm unit connected with the processing unit;

A rainproof cover is also provided at the top of the top limit block, and at least one vertically arranged vertical telescopic rod is connected to the bottom end of the rainproof cover. Two tightening knobs, and a stopper is also fixed at the bottom end of the vertical telescopic rod.

The above-mentioned water level monitoring device for water conservancy projects, wherein the inside of the monitoring box is also provided with

a manual switch, which is connected to the processing unit and used to send terminal maintenance status information to the processing unit;

A GPS unit connected to the processing unit for sending terminal location information to the processing unit; and

A wireless communication unit, which is connected to the processing unit and configured to wirelessly send the terminal maintenance status information and the terminal location information received by the processing unit to the upper computer.

In the above water level monitoring device for water conservancy projects, the terminal maintenance status information includes two statuses of "maintenance" and "non-maintenance".

The above-mentioned water conservancy project water level monitoring device, wherein the processing unit adopts an AT89C51 microcontroller, and the alarm unit adopts an acousto-optic alarm;

And, in the distance sensing unit, the pin 1 and pin 2 of the STC single-chip microcomputer unit U1 are respectively connected to the pin 12 and the pin 13 of the AT89C51 microcontroller, and at the same time, the pin 1 and the pin of the STC single-chip microcomputer unit U1 Pin 2 is also connected to the first end of resistor R3 and resistor R2 respectively, the second end of resistor R3 and resistor R2 are both connected to +5V power supply terminal, pin 9 of STC microcontroller unit U1 is connected to the first end of resistor R6, STC microcontroller The pin 10 of the unit U1 is connected to the first end of the resistor R7 and the resistor R9 and the collector of the transistor Q2 at the same time, the second end of the resistor R7 is connected to the +5V power supply terminal, and the pin 12 of the STC microcontroller unit U1 is connected to the transistor through the resistor R5. The base of Q1, the pin 13 of the STC microcontroller unit U1 is connected to the pin 10 of the MAX235 unit U2, the pin 14 of the STC microcontroller unit U1 is connected to the pin 11 of the MAX235 unit U2, and the pins 7 and 14 of the MAX235 unit U2 Connect to the two ends of the ultrasonic transmitter T40 respectively, the pin 16 of the MAX235 unit U2 is connected to the collector of the transistor Q1, and the emitter of the transistor Q1 is connected to the +5V power supply terminal;

The base of transistor Q2 is connected to the first end of resistor Ra and resistor Rb at the same time, the second end of resistor Ra is connected to pin 1 of TL074 unit U3, the second end of resistor Rb is grounded, and the second end of resistor R6 is connected to resistor R8 at the same time , resistor R11, resistor R16, resistor RC7 and the first end of capacitor C7, the second end of resistor R8 is connected to pin 2 of TL074 unit U3, the second end of resistor R11 is connected to +5V power supply terminal, resistor R16, resistor RC7 and The second end of capacitor C7 is grounded, the second end of resistor R9 is connected to pin 3 of TL074 unit U3 and the first end of resistor R10 at the same time, the second end of resistor R10 is connected to pin 6 of TL074 unit U3 and the first end of R12 at the same time. The first end, the second end of R12 is connected to pin 7 of TL074 unit U3 and the first end of capacitor C9 at the same time, the second end of capacitor C9 is connected to pin 8 of TL074 unit U3 and the first end of resistor R14 after passing through resistor R13. One end is connected to the first end of capacitor C12, the second end of resistor R14 is connected to pin 9 of TL074 unit U3 and the first end of capacitor C10 at the same time, and the second end of capacitor C10 and capacitor C12 is connected to the first end of resistor R15 at the same time. One end and the first end of resistor R19, the second end of R15 is connected to pin 10 of TL074 unit U3, the second end of resistor R19 is connected to pin 14 of TL074 unit U3 and the first end of resistor R18 at the same time, the The second end is connected to pin 13 of TL074 unit U3 and the first end of capacitor C15. The second end of capacitor C15 is connected to one end of ultrasonic receiver R40 through resistor R17, and the other end of ultrasonic receiver R40 is grounded.

The above-mentioned water level monitoring device for water conservancy projects, wherein a bottom support rod is threadedly connected to the bottom inner threaded hole of the limit chassis, and a mounting chassis is also horizontally arranged at the bottom end of the bottom support rod. On the mounting chassis A plurality of mounting plate holes are also opened.

The above-mentioned water level monitoring device for water conservancy projects, wherein a horizontal mounting rod is connected to the top limit block, a mounting plate is provided at the other end of the horizontal mounting rod, and a plurality of mounting plate holes are also opened on the mounting plate .

In the above water level monitoring device for water conservancy projects, a solar cell panel is also covered on the top of the rainproof cover, and the solar cell panel is electrically connected to the battery.

The beneficial effects of the present invention are: by adopting the above structure, the present invention can effectively monitor the water level of the water body and actively issue a warning reminder, thereby greatly improving its own performance and application range.

Description of drawings

The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

Fig. 1 is the structural representation of water level monitoring device of water conservancy project;

Fig. 2 is the structural schematic diagram of the vertical fixed installation of the water level monitoring device of the water conservancy project;

Fig. 3 is the structural schematic diagram of the horizontal fixed installation of the water level monitoring device of the water conservancy project;

Fig. 4 is the circuit structure block diagram of the monitoring module;

FIG. 5 is a schematic structural diagram of the circuit of the distance sensing unit of the monitoring module.

In the figure: slide bar 1, limit chassis 2, top limit block 3, floating block 4, mounting block 5, first tightening knob 6, monitoring box 7, monitoring module 8, rain cover 9, vertical telescopic Rod 10 , second tightening knob 11 , block 12 , bottom support rod 13 , mounting chassis 14 , transverse mounting rod 15 , mounting plate 16 .

Detailed ways

As shown in Figure 1, it is a schematic diagram of the structure of the water level monitoring device of the water conservancy project. The device includes a vertically arranged sliding rod 1, a circular limit chassis 2 is threaded at the bottom end of the sliding rod 1, and a bottom inner threaded hole is opened in the bottom center of the limit chassis 2 (not shown in the figure). ), a top stop block 3 is fixed on the top of the sliding rod 1, and a floating block 4 and a mounting block 5 are also slidably sleeved on the sliding rod 1, and the mounting block 5 is located above the floating block 4, and is The mounting block 5 is also provided with a first tightening knob 6;

A monitoring box 7 with an open bottom end is also installed on the mounting block 5, and a storage battery for power supply and a monitoring module 8 for monitoring the distance between the monitoring box 7 and the floating block 4 are respectively provided inside the monitoring box 7, As shown in FIG. 4 , the monitoring module 8 includes a distance sensing unit, a processing unit connected with the sensing distance unit, and an alarm unit connected with the processing unit;

A rainproof cover body 9 is also provided at the top of the top limit block 3, and at least one vertically arranged vertical telescopic rod 10 is connected to the bottom end of the rainproof cover body 9, and a second telescopic rod 10 is provided on the vertical telescopic rod 10 The knob 11 is fastened, and a stopper 12 is also fixed at the bottom end of the vertical telescopic rod 10 .

According to the different installation conditions of the water level monitoring site, the device can be installed vertically or horizontally, thus effectively ensuring the convenience and flexibility of installation. FIG. 2 shows that the device is installed in a vertical fixed installation method. Specifically, a bottom support rod 13 is threadedly connected to the bottom inner threaded hole of the limit chassis 2, and a bottom support rod 13 is also horizontally arranged at the bottom end. There is an installation chassis 14, and a plurality of installation plate holes are also opened on the installation chassis 14, and the installation chassis 14 is fixedly installed on the bottom plane of the water body (such as the bottom ground of a river and aqueduct), and the limit chassis is realized through the bottom support rod 1. 2 and the support of the slide bar 1 and other components. According to the different installation heights required by the limit chassis 2 , the bottom support rod 13 with a suitable length and size can be selected. Further, the bottom support rod 13 can be a telescopic rod, so that the length of the bottom support rod 13 can be adjusted more simply and flexibly.

Figure 3 shows that the device is installed in a horizontal fixed installation method. Specifically, a horizontal installation rod 15 is connected to the top limit block 3, and a mounting plate 16 is provided on the other end of the horizontal installation rod 15. The installation plate 16 There are also a plurality of mounting plate holes on the top, and the mounting plate 16 is fixedly installed on the side wall of the water channel or the standing column that has been erected in the river channel, etc., and at the same time, the limit chassis 2 is ensured at a suitable height position.

Based on the above structure, in the actual working process of the device, the limit chassis 2 is at a suitable height position on the water level monitoring site, and the monitoring module 8 in the monitoring box 7 measures the distance between the monitoring box 7 and the floating block 4. real-time monitoring. When the water level of the water body is lower than the limit chassis 2, the floating block 4 will not be subject to the buoyancy of the water body, so it is at the bottommost position of the sliding rod 1;

As the water level continues to rise, when the water level is higher than the limit chassis 2, the floating block 4 will be subject to the buoyancy of the water body and move upward along the slide bar 1 under the action of buoyancy. At this time, the monitoring box 7 and the floating block The distance between 4 begins to decrease; with the further rise of the water level, the distance between the monitoring box 7 and the floating block 4 will be further reduced, when the distance between the monitoring box 7 and the floating block 4 reaches When the set minimum distance value (corresponding to the water level of the water body rising to the water level warning line), the monitoring module 8 will alarm through the alarm unit, thereby automatically (or actively) realizing the warning reminder of the water level here.

It can be seen from the above working process that even if the water level of the water body rises to the water level warning position, the monitoring module 8 is triggered to give an alarm, but at this time the water level of the water body still has a certain distance from the monitoring box 7 (the distance can be flexibly determined according to needs), so that Therefore, the water body is effectively prevented from contacting and soaking the monitoring box 7 , thereby effectively ensuring the use performance and operation safety of the monitoring box 7 .

At the same time, by providing a rainproof cover 9 at the top of the top limit block 3, the monitoring box 7 can be further prevented from being eroded and damaged by external rainwater, and the monitoring box 7 can also be prevented from being damaged by foreign objects falling from the outside; The bottom end of the body 9 is connected with a vertical telescopic rod 10 and a block 12 (the length of the vertical telescopic rod 10 can be flexibly adjusted according to the needs of the monitoring site), and the height position of the adjustment block 12 is slightly lower than the height position of the monitoring box 7 , in this way, when the floating block 4 has risen to a certain height and the monitoring module 8 is triggered to give an alarm, the block 12 can further limit the upper limit position of the floating block 4, and the block 12 can effectively prevent the floating block 4 from rising. The lifting block 4 contacts or collides with the monitoring box 7 , thereby avoiding damage to the monitoring box 7 caused by the floating block 4 , which greatly ensures the safety performance of the monitoring box 7 .

Preferably, for the above water conservancy project water level monitoring device, the top of the rainproof cover body 9 is also covered with a solar panel, and the solar panel is electrically connected to the battery. In this way, the battery in the monitoring box 7 can be charged through the solar panel, thereby greatly enhancing the battery life and performance of the monitoring box 7 .

For the above water level monitoring device for water conservancy projects, the distance sensing unit uses ultrasonic transmitters and ultrasonic receivers to perform ultrasonic ranging on the distance between the monitoring box 7 and the floating block 4, the processing unit can use AT89C51 microcontroller, and the alarm unit can Sound and light alarms are used. And, as shown in Figure 5, in the distance sensing unit, pin 1 and pin 2 of the STC microcontroller unit U1 are respectively connected to pin 12 of the AT89C51 microcontroller (that is, the processing unit) (P3. 2 terminal) and pin 13 (P3.3 terminal of AT89C51 microcontroller), at the same time, pin 1 and pin 2 of STC microcontroller unit U1 are also connected to the first terminals of resistor R3 and resistor R2 respectively, resistor R3 and resistor The second terminals of R2 are connected to the +5V power supply terminal, the pin 9 of the STC single-chip unit U1 is connected to the first terminal of the resistor R6, the pin 10 of the STC single-chip unit U1 is connected to the first terminals of the resistor R7 and the resistor R9 and the transistor at the same time The collector of Q2, the second end of the resistor R7 is connected to the +5V power supply terminal, the pin 12 of the STC microcontroller unit U1 is connected to the base of the transistor Q1 through the resistor R5, and the pin 13 of the STC microcontroller unit U1 is connected to the lead of the MAX235 unit U2. Pin 10, pin 14 of STC MCU unit U1 is connected to pin 11 of MAX235 unit U2, pin 7 and pin 14 of MAX235 unit U2 are connected to both ends of ultrasonic transmitter T40 respectively, pin 16 of MAX235 unit U2 is connected The collector of the transistor Q1 and the emitter of the transistor Q1 are connected to the +5V power supply terminal;

The base of transistor Q2 is connected to the first end of resistor Ra and resistor Rb at the same time, the second end of resistor Ra is connected to pin 1 of TL074 unit U3, the second end of resistor Rb is grounded, and the second end of resistor R6 is connected to resistor R8 at the same time , resistor R11, resistor R16, resistor RC7 and the first end of capacitor C7, the second end of resistor R8 is connected to pin 2 of TL074 unit U3, the second end of resistor R11 is connected to +5V power supply terminal, resistor R16, resistor RC7 and The second end of capacitor C7 is grounded, the second end of resistor R9 is connected to pin 3 of TL074 unit U3 and the first end of resistor R10 at the same time, the second end of resistor R10 is connected to pin 6 of TL074 unit U3 and the first end of R12 at the same time. The first end, the second end of R12 is connected to pin 7 of TL074 unit U3 and the first end of capacitor C9 at the same time, the second end of capacitor C9 is connected to pin 8 of TL074 unit U3 and the first end of resistor R14 after passing through resistor R13. One end is connected to the first end of capacitor C12, the second end of resistor R14 is connected to pin 9 of TL074 unit U3 and the first end of capacitor C10 at the same time, and the second end of capacitor C10 and capacitor C12 is connected to the first end of resistor R15 at the same time. One end and the first end of resistor R19, the second end of R15 is connected to pin 10 of TL074 unit U3, the second end of resistor R19 is connected to pin 14 of TL074 unit U3 and the first end of resistor R18 at the same time, the The second end is connected to pin 13 of TL074 unit U3 and the first end of capacitor C15. The second end of capacitor C15 is connected to one end of ultrasonic receiver R40 through resistor R17, and the other end of ultrasonic receiver R40 is grounded.

Under the above circuit structure, the ultrasonic transmitter is aimed at the floating block 4 to transmit the ultrasonic wave and starts timing, the ultrasonic wave propagates in the air, and is reflected back after reaching the floating block 4. The ultrasonic receiver stops timing immediately after receiving the reflected pulse. Then, the distance between the monitoring box 7 and the floating block 4 can be calculated according to the propagation speed of the ultrasonic wave and the timing time.

Preferably, for the above-mentioned water level monitoring device for water conservancy projects, the inside of the monitoring box 7 is also provided with

Manual switch, the manual switch is connected with the processing unit, and is used for sending terminal maintenance status information to the processing unit;

GPS unit, the GPS unit is connected with the processing unit for sending terminal location information to the processing unit; and

The wireless communication unit is connected with the processing unit, and is used for wirelessly sending the terminal maintenance status information and the terminal position information received by the processing unit to the upper computer (information processing platform).

Among them, according to the two states of "closed" and "open" of the manual switch, it can respectively determine and send two state information of "maintenance" and "non-maintenance" to the processing unit.

Under the above structure, when the manual switch is in the "off" state, the water level monitoring terminal is correspondingly in the normal monitoring working state, that is, the "non-maintenance" state. At this time, when the water level monitoring terminal regularly wirelessly sends terminal information to the upper computer, it will send the "non-maintenance" status information of the manual switch, the position information of the monitoring box 7 and the current distance between the monitoring box 7 and the floating block 4. The information is packaged and sent together, which not only greatly facilitates the remote monitoring of the monitoring box 7 terminal by the staff operating the upper computer, but also facilitates and effectively collects, saves and organizes the monitoring data to form the working log of the water level monitoring terminal, which is convenient for subsequent data analysis.

When the staff regularly maintains or inspects the monitoring box 7, they can first turn the manual switch to the "closed" state. At this time, the terminal of the monitoring box 7 is correspondingly in the inspection and testing state, that is, the "maintenance" state. At this time, when the water level monitoring terminal sends the terminal information wirelessly to the upper computer, the "maintenance" status information of the manual switch, the position information of the monitoring box 7 and the current distance information between the monitoring box 7 and the floating block 4 will be stored together. And packaged and sent, this not only realizes the test of whether the wireless transmission function of the monitoring box 7 terminal is normal, but also can conveniently and effectively collect and save the regular maintenance data of the monitoring box 7 terminal, forming the maintenance log of the water level monitoring terminal.

At the same time, as a specific embodiment, when the monitoring box 7 terminals are arranged in multiple occasions where water level monitoring is required, at this time, one upper computer (information processing platform) corresponds to a plurality of monitoring box 7 terminals downward at the same time, and Each monitoring box 7 terminal can form a unique ID (identity identification) based on its own location information, so that through multiple monitoring box 7 terminals and the host computer, real-time monitoring of water levels in multiple locations can be realized at the same time. This greatly improves the monitoring efficiency and ensures the safety of the monitoring process.

The preferred specific embodiments and embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned embodiments and embodiments. Various changes are made under the premise of the inventive concept.

Claims (7)

1. A water level monitoring device for a water conservancy project, comprising a vertically arranged sliding rod, characterized in that: the bottom end of the sliding rod is threadedly fitted with a circular limit chassis, and the bottom center of the limit chassis is opened There is a bottom inner threaded hole, a top limit block is fixed on the top of the sliding rod, and a floating block and a mounting block are respectively slidably sleeved on the sliding rod, and the mounting block is located on the floating block. above the mounting block, and a first tightening knob is also provided on the mounting block; A monitoring box with an open bottom end is also installed on the mounting block, and a battery for power supply and a monitoring module for monitoring the distance between the monitoring box and the floating block are respectively provided inside the monitoring box, The monitoring modules respectively include a distance sensing unit, a processing unit connected with the sensing distance unit, and an alarm unit connected with the processing unit; A rainproof cover is also provided at the top of the top limit block, and at least one vertically arranged vertical telescopic rod is connected to the bottom end of the rainproof cover. Two tightening knobs, and a stopper is also fixed at the bottom end of the vertical telescopic rod. 2. The water level monitoring device of a water conservancy project as claimed in claim 1, characterized in that: the inside of the monitoring box is also respectively provided with a manual switch, which is connected to the processing unit and used to send terminal maintenance status information to the processing unit; A GPS unit connected to the processing unit for sending terminal location information to the processing unit; and A wireless communication unit, which is connected to the processing unit and configured to wirelessly send the terminal maintenance status information and the terminal location information received by the processing unit to the upper computer. 3. The water level monitoring device of claim 2, wherein the terminal maintenance status information includes two statuses of "maintenance" and "non-maintenance". 4. The water level monitoring device of any one of claims 1 to 3, wherein the processing unit adopts an AT89C51 microcontroller, and the alarm unit adopts an audible and visual alarm; And, in the distance sensing unit, the pin 1 and pin 2 of the STC single-chip microcomputer unit U1 are respectively connected to the pin 12 and the pin 13 of the AT89C51 microcontroller, and at the same time, the pin 1 and the pin of the STC single-chip microcomputer unit U1 Pin 2 is also connected to the first end of resistor R3 and resistor R2 respectively, the second end of resistor R3 and resistor R2 are both connected to +5V power supply terminal, pin 9 of STC microcontroller unit U1 is connected to the first end of resistor R6, STC microcontroller The pin 10 of the unit U1 is connected to the first end of the resistor R7 and the resistor R9 and the collector of the transistor Q2 at the same time, the second end of the resistor R7 is connected to the +5V power supply terminal, and the pin 12 of the STC microcontroller unit U1 is connected to the transistor through the resistor R5. The base of Q1, the pin 13 of the STC microcontroller unit U1 is connected to the pin 10 of the MAX235 unit U2, the pin 14 of the STC microcontroller unit U1 is connected to the pin 11 of the MAX235 unit U2, and the pins 7 and 14 of the MAX235 unit U2 Connect to the two ends of the ultrasonic transmitter T40 respectively, the pin 16 of the MAX235 unit U2 is connected to the collector of the transistor Q1, and the emitter of the transistor Q1 is connected to the +5V power supply terminal; The base of transistor Q2 is connected to the first end of resistor Ra and resistor Rb at the same time, the second end of resistor Ra is connected to pin 1 of TL074 unit U3, the second end of resistor Rb is grounded, and the second end of resistor R6 is connected to resistor R8 at the same time , resistor R11, resistor R16, resistor RC7 and the first end of capacitor C7, the second end of resistor R8 is connected to pin 2 of TL074 unit U3, the second end of resistor R11 is connected to +5V power supply terminal, resistor R16, resistor RC7 and The second end of capacitor C7 is grounded, the second end of resistor R9 is connected to pin 3 of TL074 unit U3 and the first end of resistor R10 at the same time, the second end of resistor R10 is connected to pin 6 of TL074 unit U3 and the first end of R12 at the same time. The first end, the second end of R12 is connected to pin 7 of TL074 unit U3 and the first end of capacitor C9 at the same time, the second end of capacitor C9 is connected to pin 8 of TL074 unit U3 and the first end of resistor R14 after passing through resistor R13. One end is connected to the first end of capacitor C12, the second end of resistor R14 is connected to pin 9 of TL074 unit U3 and the first end of capacitor C10 at the same time, and the second end of capacitor C10 and capacitor C12 is connected to the first end of resistor R15 at the same time. One end and the first end of resistor R19, the second end of R15 is connected to pin 10 of TL074 unit U3, the second end of resistor R19 is connected to pin 14 of TL074 unit U3 and the first end of resistor R18 at the same time, the The second end is connected to pin 13 of TL074 unit U3 and the first end of capacitor C15. The second end of capacitor C15 is connected to one end of ultrasonic receiver R40 through resistor R17, and the other end of ultrasonic receiver R40 is grounded. 5. The water level monitoring device for a water conservancy project according to claim 1, wherein a bottom support rod is threadedly connected at the bottom inner threaded hole of the limit chassis, and the bottom end of the bottom support rod is also horizontal An installation chassis is provided, and a plurality of installation plate holes are also opened on the installation chassis. 6. The water level monitoring device for a water conservancy project according to claim 1, characterized in that: a transverse mounting rod is connected to the top stop, and a mounting plate is provided at the other end of the transverse mounting rod, The mounting plate is also provided with a plurality of mounting plate holes. 7 . The water level monitoring device for a water conservancy project according to claim 1 , wherein the top of the rainproof cover is also covered with a solar panel, and the solar panel is electrically connected to the battery. 8 .

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