CN110879085A - Floating ball-torsion spring type liquid level and flow rate online detection device - Google Patents

Abstract

The present invention provides a float-torsion spring type liquid level and flow rate online detection device, the device includes: a control circuit, the control circuit includes a processing unit and a communication unit; a first rotation angle sensor and a second rotation angle sensor, respectively connected to the The processing unit is communicatively connected, and the acquired signal data is sent to the processing unit for calculation, and the calculation result is sent out through the communication unit; the pendulum rod and the floating ball, the pendulum rod is pivotally connected to the fixed plate through the first rotation angle sensor, so The floating ball is pivotally connected to the pendulum rod through a second rotation angle sensor. The floating ball-torsion spring type liquid level and flow velocity online detection device of the present invention can perform remote data transmission, real-time online monitoring, and is easy to install, with low installation and maintenance costs.

Description

A floating ball-torsion spring type liquid level and flow velocity online detection device

technical field

The invention belongs to the field of detection, relates to a device for detecting the liquid level and flow velocity of a drainage pipeline, and in particular relates to a float-torsion spring type liquid level and flow velocity online detection device.

Background technique

The internal environment of the drainage pipeline is harsh, and the water flow conditions are changeable, and there are strict requirements for the use of pipeline flowmeters. Its applicability mainly includes strong anti-interference ability, and it must be able to resist the interference of impurities in the water. In addition, the drainage pipe space is small, and the installation sites are mainly various wells. It is hoped that the water level and flow meter has a low installation space and is easy to fix. Thirdly, it requires low cost of use and can be popularized on a large scale. In addition to the price of the equipment itself, it is also necessary to consider the installation cost and later maintenance costs. It also needs to be able to carry out remote data transmission and real-time online monitoring. Considering the above factors, the currently commonly used flowmeters have various defects that cannot meet the requirements of use. For example, the rotor-type flow meter is easy to hang garbage when it is used; the Doppler flowmeter has strong waterproof and anti-fouling ability, but the cost is high and cannot be widely used.

In order to solve this problem, the present invention designs an on-line detection device for floating ball-torsion spring type liquid level and flow rate suitable for drainage pipes.

SUMMARY OF THE INVENTION

In order to solve the problems of the prior art, the present invention provides a floating ball-torsion spring type liquid level and flow velocity online detection device, which comprises:

a control circuit, the control circuit includes a processing unit and a communication unit;

The first rotation angle sensor and the second rotation angle sensor are respectively connected in communication with the processing unit, and send the acquired signal data to the processing unit for calculation, and the calculation result is sent through the communication unit;

A pendulum rod and a floating ball, the pendulum rod is connected to the fixed plate through a first rotation angle sensor, and the floating ball is connected to the pendulum rod through a second rotation angle sensor.

Further, the first and second rotation angle sensors include an encoder and a rotating shaft, and when the rotating shaft rotates, the encoder outputs an electrical signal to mark the rotation angle.

Further, the device also includes:

a first mounting seat, the first mounting seat is fixed on the fixing plate, and the first rotation angle sensor is fixedly mounted on the first mounting seat;

The first pin and the first connecting pipe are arranged on the first mounting seat, the rotating shaft of the first rotation angle sensor is fixedly passed through the first connecting pipe, and the first connecting pipe and the swing rod are connected together to The first pin rotates as an axis, so that the rotation axis of the first rotation angle sensor rotates through a certain angle.

Further, the device further comprises a rocking rod connecting piece, one end of the rocking rod connecting piece is connected to the rocking rod, and the other end is connected to the first connecting pipe;

The first mounting seat is a rectangular seat with a U-shaped opening, and the width of the opening matches the width of the swing rod connecting piece.

Further, the device also includes:

a second installation seat, the second installation seat is fixed on the swing rod, and the second rotation angle sensor is fixedly installed on the second installation seat;

The second pin and the second connecting pipe are arranged on the second mounting seat, the rotating shaft of the second rotation angle sensor is fixedly passed through the second connecting pipe, and the second connecting pipe and the floating ball are connected together to The second pin rotates as an axis, so that the rotation axis of the second rotation angle sensor rotates through a certain angle.

Further, the device further includes a first torsion spring and a second torsion spring, which are respectively disposed at both ends of the second connecting tube, so that the second connecting tube generates torque when it rotates around the second pin.

Further, the device further comprises a floating ball connecting piece, one end of the floating ball connecting piece is connected to the floating ball, and the other end is connected to the second connecting pipe;

The second mounting seat is a rectangular seat with a rectangular opening, and the width of the opening matches the width of the floating ball connecting piece and the lengths of the first torsion spring and the second torsion spring.

Further, the control circuit further includes a zero-setting switch, which is connected in communication with the processing unit.

Further, the control circuit further includes a power supply for supplying power to the circuit modules in the control circuit.

Further, the control circuit also includes an electromagnetic relay and an electromagnetic relay interruption switch;

the first rotation angle sensor and the second rotation angle sensor are connected to the power supply through an electromagnetic relay;

The electromagnetic relay interruption switch is connected in communication with the control unit, and is used for controlling on/off of the electromagnetic relay.

The floating ball-torsion spring type liquid level and flow velocity online detection device of the present invention can perform remote data transmission, real-time online monitoring, easy installation, and low installation and maintenance costs.

Description of drawings

The above and other objects, features and advantages of the present disclosure will become more apparent from the more detailed description of the exemplary embodiments of the present disclosure taken in conjunction with the accompanying drawings, wherein the same reference numerals generally refer to the exemplary embodiments of the present disclosure. same parts.

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

FIG. 1 is a schematic diagram of the overall structure of a float-torsion spring type on-line detection device for liquid level and flow rate according to an embodiment of the present invention.

FIG. 2 is a schematic diagram of the installation structure of the float-torsion spring type liquid level and flow rate online detection device according to an embodiment of the present invention.

3 is a cross-sectional view of the first mounting seat of the float-torsion spring type liquid level and flow velocity online detection device according to an embodiment of the present invention.

4 is a cross-sectional view of a second mounting seat of the float-torsion spring type liquid level and flow velocity online detection device according to an embodiment of the present invention.

5 is a schematic diagram of a mounting seat fixing plate of the float-torsion spring type liquid level and flow velocity online detection device according to an embodiment of the present invention.

FIG. 6 is a schematic diagram of a float structure of a float-torsion spring type liquid level and flow rate online detection device according to an embodiment of the present invention.

7 is a working state diagram of the electronic control of the float-torsion spring type liquid level and flow rate online detection device according to an embodiment of the present invention.

FIG. 8 is an overall circuit diagram of a float-torsion spring type liquid level and flow rate online detection device according to an embodiment of the present invention.

Reference number:

Electric cabinet box 1; first aluminum profile 2; second aluminum profile 3; fixing screw 4; fixing plate 5; first mounting seat 6; first rotation angle sensor 7; Rod 10; connecting bolt 11; float 12; second mounting seat 13; second rotation angle sensor 14; inspection well 15; first pin 16; first connecting pipe 17; second pin 18; second connecting pipe 19; A torsion spring 20; second torsion spring 21; power supply 43; processing unit 48; zero reset switch 54; electromagnetic relay interrupt switch 53; power switch 44; The first step-down module 47; the second step-down module 50; the 4G module 51; the RS232 to TTL module 52; Female terminal 55; GND2 row female terminal 56; first resistor 59; second resistor 61; GND1 row female terminal 63.

Detailed ways

Preferred embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While preferred embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

The present disclosure proposes a float-torsion spring type on-line detection device for liquid level and flow velocity, which includes:

a control circuit, the control circuit includes a processing unit and a communication unit;

The first rotation angle sensor and the second rotation angle sensor are respectively connected in communication with the processing unit, and send the acquired signal data to the processing unit for calculation, and the calculation result is sent through the communication unit;

A pendulum rod and a floating ball, the pendulum rod is pivotally connected to the fixed plate through a first rotation angle sensor, and the floating ball is pivotally connected to the pendulum rod through a second rotation angle sensor.

Specifically, when the floating ball floats on the water, the water level rises and falls to make the floating ball rise and fall, and the pendulum rod connected to the floating ball rotates, so the first rotation angle sensor and the second rotation angle sensor may rotate. The first and second angle sensors include an encoder and a rotating shaft. When the rotating shaft rotates, the encoder outputs an electrical signal to mark the angle of rotation. The signal measured by the first angle sensor is used to give water level data, and the signal measured by the second angle sensor is used. The signal is used to calculate the thrust on the float, thereby detecting the flow rate.

Further, the device also includes:

a first mounting seat, the first mounting seat is fixed on the fixing plate, and the first rotation angle sensor is fixedly mounted on the first mounting seat;

The first pin and the first connecting pipe are arranged on the first mounting seat, the rotating shaft of the first rotation angle sensor is fixedly passed through the first connecting pipe, and the first connecting pipe and the swing rod are connected together to The first pin rotates as an axis, so that the rotation axis of the first rotation angle sensor rotates through a certain angle.

Further, the device further comprises a rocking rod connecting piece, one end of the rocking rod connecting piece is connected to the rocking rod, and the other end is connected to the first connecting pipe;

The first mounting seat is a rectangular seat with a U-shaped opening, and the width of the opening matches the width of the swing rod connecting piece.

Further, the device also includes:

a second installation seat, the second installation seat is fixed on the swing rod, and the second rotation angle sensor is fixedly installed on the second installation seat;

The second pin and the second connecting pipe are arranged on the second mounting seat, the rotating shaft of the second rotation angle sensor is fixedly passed through the second connecting pipe, and the second connecting pipe and the floating ball are connected together to The second pin rotates as an axis, so that the rotation axis of the second rotation angle sensor rotates through a certain angle.

Further, the device further includes a first torsion spring and a second torsion spring, which are respectively disposed at both ends of the second connecting tube, so that the second connecting tube generates torque when it rotates around the second pin.

Further, the device further comprises a floating ball connecting piece, one end of the floating ball connecting piece is connected to the floating ball, and the other end is connected to the second connecting pipe;

The second mounting seat is a rectangular seat with a rectangular opening, and the width of the opening matches the width of the floating ball connecting piece and the lengths of the first torsion spring and the second torsion spring.

Further, the control circuit further includes a zero-setting switch, which is connected in communication with the processing unit.

Further, the control circuit further includes a power supply for supplying power to the circuit modules in the control circuit.

Further, the control circuit also includes an electromagnetic relay and an electromagnetic relay interruption switch;

the first rotation angle sensor and the second rotation angle sensor are connected to the power supply through an electromagnetic relay;

The electromagnetic relay interruption switch is connected in communication with the control unit, and is used for controlling on/off of the electromagnetic relay.

In the present invention, the liquid level measurement process: press the power switch to supply power to the entire control device. Manually pull the initial position of the floating ball to the bottom, measure the initial angle θ between the pendulum rod and the vertical direction, and then press the zero-setting switch to set the current value of the first rotation angle sensor to 0. When the liquid level rises, the float ball in the water moves up with the liquid level. The floating ball connecting piece and the second mounting seat connected with the floating ball move up, driving the swing rod and the swing rod connecting piece to rotate relative to the first pin as the axis, so that the rotating shaft of the first rotation angle sensor rotates through a certain angle.

The analog signal of the first rotation angle sensor is input to the processing unit to read the angle β in real time, through the relationship between the rotated angle and the liquid level H=Lcosθ-Lcos(θ+β)+h(H liquid level height, L pendulum rod Length, θ initial angle, β real-time measured turning angle, and the depth of float immersed in the liquid surface) are converted in the processing unit to output the height of the liquid level. The data is uploaded to the cloud through the unique ID address of the 4G module. The 4G module creates a virtual serial port, and the remote PC terminal monitors the liquid level in real time online by reading the virtual serial port.

Flow rate measurement process: Press the power switch to supply power to the entire control device. Set the initial position of the float to the lowest part, and then press the zero switch to set the value of the second rotation angle sensor to 0 when there is no flow rate. When there is a flow rate, the floating ball is subjected to thrust, and the floating ball connecting piece connected to the floating ball will rotate relative to the second pin as the axis, so that the rotating shaft of the second rotation angle sensor rotates through a certain angle. The analog signal of the second rotation angle sensor is input to the processing unit to read the angle γ in real time, according to the formula F*L1=K*γ(F: the moment generated by the thrust received by the floating ball is balanced with the moment generated by the torsion spring) Thrust, L1: the distance from the floating ball to the second pin, r: the angle that the floating ball rotates, K: the spring constant of the torsion spring) so that the thrust F received by the floating ball can be obtained. The relationship between the passing force and the flow velocity F=0.5Cρv ² A (C: dimensionless resistance coefficient, v: flow velocity, A: the up-flow area of the object, ρ: fluid density) convert the size of the output flow velocity in the processing unit . The data is uploaded to the cloud through the unique ID address of the 4G module. The 4G module creates a virtual serial port, and the remote PC terminal detects the flow rate online in real time by reading the virtual serial port.

To facilitate understanding of the solutions and effects of the embodiments of the present invention, a specific application example is given below. It will be understood by those skilled in the art that this example is provided only to facilitate understanding of the invention and that any specific details thereof are not intended to limit the invention in any way.

In this embodiment, a floating ball-torsion spring type liquid level and flow velocity online detection device is designed, as shown in FIG. 1 and FIG. . The control device is installed in the electrical cabinet box 1 , and the first aluminum profile 2 and the second aluminum profile 3 are used to fix the electrical cabinet box 1 . The electrical cabinet box 1 is fixed on the wall surface of the inspection well 15 by fixing screws 4 .

The fixing plate 5 is mounted on the front panel of the electric control box, the first mounting seat 6 is fixed on the fixing plate 5 , and the first rotation angle sensor 7 is fixedly mounted on the first mounting seat 6 . The second mounting seat 13 is fixed on the swing rod 10 , and the second rotation angle sensor 14 is fixedly mounted on the second mounting seat 13 .

Specifically, as shown in FIG. 3 , the first mounting seat 6 is a rectangular seat with a U-shaped opening, the width of the opening matches the width of the rocker link 8 , and is mounted on the fixing plate 5 . As shown in FIG. 5 , the through hole m1 is matched with the threaded hole a1 on the first mounting seat 6 . A jack screw is installed in the threaded hole c1 to fix the swing rod connecting piece 8 and the first connecting pipe 17 together. The swing rod connecting member 8 is provided with an inner thread hole b1, which is convenient for mating with the outer thread at one end of the swing rod 10 .

As shown in FIG. 4 , the second mounting seat 13 is a rectangular seat with a rectangular opening, and the width of the opening matches the width of the floating ball connecting piece 9 and the lengths of the first torsion spring 20 and the second torsion spring 21 . As shown in FIG. 1 and FIG. 4 , the threaded hole e1 and the swing rod 10 are connected together by connecting bolts 11 . The threaded hole f1 is installed with a jack screw to fix the floating ball connector 9 and the second connecting pipe 19 together. The floating ball connector 9 is provided with an inner threaded hole d1 for easy installation with the floating ball 12 .

The rotation angle sensor is a combination of an encoder and a rotating shaft. When the rotating shaft rotates, the encoder outputs an electrical signal to mark the rotation angle. The first rotation angle sensor 7 is fixed on the first mounting seat 6 , as shown in FIG. 3 , its rotating shaft is passed through the first connecting pipe 17 , and the first connecting pipe 17 and the swing rod connecting piece 8 are fixed together by a jack wire. In this way, the rotation of the pendulum rod 10 will drive the rotation shaft of the first rotation angle sensor 7 to rotate. Similarly, the second rotation angle sensor 14 is fixed on the second mounting base 13, as shown in FIG. 4, its rotating shaft is passed through the second connecting pipe 19, and the second connecting pipe 19 and the floating ball connecting piece 9 are fixed on the second connecting pipe 19 through the jack wire Together. In this way, the rotation of the floating ball 12 will drive the rotation shaft of the second rotation angle sensor 14 to rotate.

As shown in Figs. 1 and 6, the floating ball 12 may be a hollow sphere, or may be an elliptical hollow sphere. The floating ball 12 floats on the water, and approximately 1/3 of the diameter of the ball is submerged in the water. When the water level rises and falls, the float ball 12 is raised and lowered, so that the swing rod 10, the swing rod connecting piece 8, the floating ball connecting piece 9, the second mounting seat 13, and the rotating shaft of the first angle sensor rotate together around the first pin 16. The sensor 7 will give the water level data; the water flow velocity v will give a thrust to the float 12, so that the float connecting piece 9 connected to it and the rotating shaft of the second rotation angle sensor together generate a moment around the second pin 18, and the first torsion spring 20 and the first torsion spring 20 and the first torsion spring 20. The torque generated by the two torsion springs 21 is balanced, and the thrust force received by the floating ball can be obtained, thereby detecting the flow velocity.

Referring to FIG. 7 , the control device of the electric control box 1 includes a power supply 43 , a processing unit 48 , a 4G module 51 , a zero-setting switch 54 , and an electromagnetic relay interruption switch 53 . The power supply 43 powers the various parts of the control device. The first rotational angle sensor 7 and the second rotational angle sensor 14 are signal-connected to the processing unit 48 via an analog-to-digital conversion circuit. The 4G module 51 , the zero-setting switch 54 and the electromagnetic relay interruption switch 53 are respectively connected in communication with the processing unit 48 .

Referring to FIG. 8 , the control device of the electric control box 1 further includes a power switch 44 , a multi-channel power distribution board 45 , a voltage dividing module 46 , an electromagnetic relay 49 , a first step-down module 47 , a second step-down module 50 , and an RS232 converter. TTL module 52, first row female 58, second row female 57, third row female 60, fourth row female 62, 5V female row terminal 55, GND2 row female terminal 56, first resistor 59, second resistor 61 and The female terminals 63 of the GND1 row together form an internal circuit.

Specifically, the positive pole of the power supply 43 is connected to the power switch 44, the power switch 44 is connected to the positive pole of the multi-channel power distribution board 45, and the negative pole of the power supply 43 is connected to the negative pole of the multi-channel power distribution board 45, which is used to supply power to the entire circuit control system. .

The multi-channel power distribution board 45 is divided into 4 channels, the first channel VCC terminal is connected to the positive pole of the voltage divider module 46, and the GND terminal is connected to the negative pole of the voltage divider module. The second VCC terminal is connected to the positive input terminal of the first step-down module 47 , and the GND terminal is connected to the negative input terminal of the first step-down module 47 . The third VCC terminal is connected to the positive input terminal of the second step-down module 50 , and the GND terminal is connected to the negative input terminal of the second step-down module 50 . The fourth VCC terminal is connected to the positive pole of the 4G module 51 , and the GND terminal is connected to the negative pole of the 4G module 51 .

The OUT terminal of the voltage dividing module 46 is connected to the A3 port of the processing unit 48 , and the GND terminal is connected to the GND1 row female terminal 63 . Used to detect the remaining power of the power supply 43 .

The OUT+ terminal of the first step-down module 47 is connected to the positive pole of the power supply of the processing unit 48 , and the OUT- terminal is connected to the negative pole of the power supply of the processing unit 48 . Used to obtain the 12V power supply to power the processing unit 48 .

The output of the second step-down module 50 is divided into four channels, OUT+ of the first channel is connected to the VCC terminal of the electromagnetic relay 49 , and OUT- is connected to the GND terminal of the electromagnetic relay 49 . The OUT+ of the second channel is connected to the 5V bus terminal 55, and the OUT- is connected to the GND1 bus terminal 63. The OUT+ terminal of the third channel is connected to the positive pole of the electromagnetic relay interrupt switch 53 . The OUT+ terminal of the fourth channel is connected to the positive pole of the zero-setting switch 54 . Function: Obtain 5v power supply to supply power to electromagnetic relay 49, electromagnetic relay interrupt switch 53, and zero-setting switch 54.

The normally open terminal and the common terminal of the electromagnetic relay 49 have a total of two outputs. The second common terminal is connected to the 5V bus terminal 55 , and the normally open terminal is connected to the VCC terminal of the second rotation angle sensor 14 . The IN1 terminal of the electromagnetic relay 49 is connected to the No. 8 port of the processing unit 48 , and the IN2 terminal of the electromagnetic relay 49 is connected to the No. 9 port of the processing unit 48 . It is used to control the power on and off of the first rotation angle sensor 7 and the second rotation angle sensor 14 to save power.

The TX port of the RS232 to TTL module 52 is connected to the TX0 port of the processing unit 48, the RX port of the RS232 to TTL module 52 is connected to the RX0 port of the processing unit 48, the VCC port of the RS232 to TTL module 52 is connected to the 5V female terminal 55, and the RS232 to TTL The GND port of the module 52 is connected to the female terminal 63 of the GND1 row.

The OUT terminal of the first rotation angle sensor 7 is connected to the A1 port of the processing unit 48 , and the GND terminal is connected to the GND1 row female terminal 63 . It is used to convert the liquid level through the angle rotated by the rotation axis of the first rotation angle sensor 7 .

The OUT terminal of the second rotation angle sensor 14 is connected to the A2 port of the processing unit 48 , and the GND terminal is connected to the GND1 row female terminal 63 . It is used to convert the flow velocity through the angle through which the rotation shaft of the second rotation angle sensor 14 rotates.

The positive terminal of the zero-setting switch 54 is connected to the OUT+ terminal of the second step-down module 50 , and the negative terminal is connected to the first row bus 58 . Since the installation position cannot be guaranteed to be the same every time, the zero-setting switch 54 can set the measured data to zero at any position.

The positive terminal of the electromagnetic relay interrupt switch 53 is connected to the OUT+ terminal of the second step-down module 50 , and the negative terminal is connected to the fourth row bus 62 . It is used to control the on-off of the electromagnetic relay 49, so as to control the on-off of the first rotation angle sensor 7 and the second rotation angle sensor 14.

The first row of females 58 has two outputs, one is connected to the No. 3 port of the processing unit 48 , and the other is connected to the first resistor 59 . The fourth row female 62 has two outputs, one is connected to the No. 2 port of the processing unit 48 , and the other is connected to the second resistor 61 . The output of the second row female 57 is connected to the GND2 row female terminal 56 . The output of the third row female 60 is connected to the GND2 row female terminal 56 . The female terminal 56 of the GND2 row is connected to the GND port of the processing unit 48 .

The overall working process of the floating ball-torsion spring type liquid level and flow rate online detection device of the present embodiment is briefly described as follows:

Liquid level measurement process: Press the power switch 44 to supply power to the entire control device. Manually pull the initial position of the float 12 to the bottom, measure the initial angle θ between the pendulum 10 and the vertical direction, and then press the zero-set switch 54 to set the current value of the first rotation angle sensor 7 to 0. When the liquid level rises, the floating ball 12 in the water will go up with the liquid level. The floating ball connecting piece 9 and the second mounting seat 13 connected with the floating ball 12 move up, and drive the swing rod 10 and the swing rod connecting piece 8 to rotate relative to the first pin 16 as the axis, so that the first rotation angle sensor 7 is rotated. The shaft rotates through a certain angle. The analog signal of the first rotation angle sensor 7 is input to the processing unit 48 to read the angle β in real time, through the relationship between the rotated angle and the liquid level H=Lcosθ-Lcos(θ+β)+h. As shown in Figure 2: H liquid level height, L pendulum rod length, θ initial angle, β real-time measured rotation angle, and the depth of the floating ball immersed in the liquid surface. The height of the output liquid level is converted in the processing unit 48 . The data is uploaded to the cloud through the unique ID address of the 4G module. The 4G module creates a virtual serial port, and the remote PC terminal monitors the liquid level in real time online in the form of reading the virtual serial port.

Flow rate measurement process: Press the power switch 44 to supply power to the entire control system. Set the initial position of the float to the lowest part, and then press the zero-setting switch 54 to set the value of the second rotation angle sensor 14 to 0 when there is no flow velocity. When there is a flow rate, the floating ball 12 is subjected to thrust, and the floating ball connecting piece 9 connected to the floating ball 12 will rotate relative to the second pin 18, so that the second rotation angle sensor 14 rotates through a certain angle. The analog signal of the rotation angle sensor 14 is input to the processing unit 48 to read the angle γ in real time, according to the formula F*L1=K*γ that the torque generated by the thrust received by the floating ball is balanced with the torque generated by the torsion spring, so that the floating ball can be calculated received thrust F. F: The thrust of the floating ball, L1: The distance from the floating ball to the second pin, r: The angle that the floating ball rotates, K: The spring constant of the torsion spring. The relationship between the passing force and the flow velocity F=0.5Cρv ² A (C: dimensionless resistance coefficient, v: flow velocity, A: the up-flow area of the object, ρ: fluid density) is converted into the output flow velocity in the processing unit 48. size. The data is uploaded to the cloud through the unique ID address of the 4G module. The 4G module creates a virtual serial port, and the remote PC terminal detects the flow rate online in real time by reading the virtual serial port.

Various embodiments of the present disclosure have been described above, and the foregoing descriptions are exemplary, not exhaustive, and not limiting of the disclosed embodiments. Numerous modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein was chosen to best explain the principles of the embodiments, the practical application or technical improvement in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.

Claims (10)

1. The utility model provides a floater-torsional spring formula liquid level velocity of flow on-line measuring device which characterized in that, the device includes:

a control circuit comprising a processing unit and a communication unit;

the first rotation angle sensor and the second rotation angle sensor are respectively in communication connection with the processing unit, the acquired signal data are sent to the processing unit for calculation, and calculation results are sent out through the communication unit;

the swing rod is connected to the fixing plate through a first corner sensor, and the floating ball is connected to the swing rod through a second corner sensor.

2. The floating ball-torsion spring type liquid level and flow rate online detection device according to claim 1, wherein the first and second rotation angle sensors comprise an encoder and a rotating shaft, and the encoder outputs an electric signal to mark a rotation angle when the rotating shaft rotates.

3. The floating ball-torsion spring type liquid level and flow rate online detection device according to claim 2, further comprising:

the first mounting seat is fixed on the fixing plate, and the first rotating angle sensor is fixedly mounted on the first mounting seat;

the first pin and the first connecting pipe are arranged on the first mounting seat, a rotating shaft of the first rotating angle sensor is fixedly penetrated in the first connecting pipe, the first connecting pipe is connected with the swing rod together, and the first pin is used as a shaft to rotate, so that the rotating shaft of the first rotating angle sensor rotates by a certain angle.

4. The floating ball-torsion spring type liquid level and flow rate online detection device according to claim 3, further comprising a swing rod connecting piece, wherein one end of the swing rod connecting piece is connected to the swing rod, and the other end of the swing rod connecting piece is connected to the first connecting pipe;

the first mounting seat is a rectangular seat with a U-shaped opening, and the width of the opening is matched with that of the swing rod connecting piece.

5. The floating ball-torsion spring type liquid level and flow rate online detection device according to claim 2, further comprising:

the second mounting seat is fixed on the oscillating rod, and the second corner sensor is fixedly mounted on the second mounting seat;

the second connecting pipe is connected with the floating ball and rotates by taking the second pin as a shaft, so that the rotating shaft of the second corner sensor rotates by a certain angle.

6. The floating ball-torsion spring type liquid level and flow rate online detection device according to claim 5, further comprising a first torsion spring and a second torsion spring, which are respectively disposed at two ends of the second connection pipe, so that the second connection pipe generates a moment when rotating around the second pin.

7. The floating ball-torsion spring type liquid level and flow rate online detection device according to claim 6, further comprising a floating ball connecting piece, wherein one end of the floating ball connecting piece is connected to the floating ball, and the other end of the floating ball connecting piece is connected to the second connecting pipe;

the second mounting seat is a rectangular seat with a rectangular opening, and the width of the opening is matched with the width of the floating ball connecting piece and the lengths of the first torsion spring and the second torsion spring.

8. The floating ball-torsion spring type liquid level and flow rate online detection device according to claim 1, wherein the control circuit further comprises a zero switch in communication connection with the processing unit.

9. The floating ball-torsion spring type liquid level and flow rate online detection device according to claim 1, wherein the control circuit further comprises a power supply for supplying power to a circuit module in the control circuit.

10. The floating ball-torsion spring type liquid level and flow rate online detection device according to claim 9, wherein the control circuit further comprises an electromagnetic relay and an electromagnetic relay interrupt switch;

the first and second rotation angle sensors are connected to the power supply through electromagnetic relays;

the electromagnetic relay interruption switch is in communication connection with the control unit and is used for controlling the on-off of the electromagnetic relay.

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