Water tank water volume ground monitoring system and method based on ultrasonic ranging

Abstract

The invention relates to a water tank water volume ground monitoring system and method based on ultrasonic ranging, and belongs to the technical field of special aircraft task systems. According to the ground water tank water volume monitoring system and method, the water volume height is measured in real time through a non-contact method, the measurement result is transmitted to the water volume panel to be displayed, filling personnel can conveniently monitor the filling condition in real time, the filling efficiency is improved, and the requirements for quick response and fire extinguishing are met. According to the water volume sensor, an ultrasonic ranging scheme is applied to detection of the water volume of the water tank of the fire extinguishing aircraft, real-time water volume data can be obtained through the sensor, external analysis equipment is not needed, an original discrete measurement result is converted into a real-time linear measurement result, and better observability is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of special aircraft mission systems, and in particular relates to a water tank water level ground monitoring system and method based on ultrasonic ranging. Background Art

[0002] The aircraft is equipped with a water tank inside, which can be used as a fire-fighting aircraft and can perform emergency fire-fighting tasks in situations such as sudden forest fires. During the process of filling the fire-fighting medium, the total amount of medium filling needs to be mastered in real time in order to respond to the fire more quickly. This requires the ground filling personnel to be able to grasp the filling situation at any time. Traditional sensors cannot directly measure the height of the medium and need to cooperate with other controllers for analysis, which greatly reduces the filling efficiency and cannot quickly obtain the filling status in the water tank, which causes certain difficulties in judging the filling amount. Summary of the invention

[0003] 1. Technical issues to be resolved

[0004] The technical problem to be solved by the present invention is to design a ground monitoring system and method for water volume in a water tank, which can monitor the filling situation of the water tank quickly and accurately.

[0005] (II) Technical solution

[0006] In order to solve the above technical problems, the present invention provides a ground monitoring system for water volume in a water tank based on ultrasonic ranging, including a water volume sensor and a display panel; the water volume sensor is fixed on the top of the water tank and does not directly contact the water medium inside the water tank; an ultrasonic probe is arranged inside the water volume sensor and is installed toward the bottom of the water tank, which can emit high-frequency ultrasonic pulses and receive the signals reflected by the water, and the height of the water level in the water tank is calculated by calculating the time difference between ultrasonic emission and reception, and the water volume proportion corresponding to each height information of the water level is calibrated one by one to form a water volume-height lookup table, thereby obtaining the water volume percentage corresponding to different heights; the water volume sensor encapsulates the height and water volume percentage information and sends them to the display panel via the RS422 bus, and the parameters displayed on the display panel can monitor the internal liquid level height of the water tank during filling in real time, thereby realizing the monitoring of the filling situation of the water tank.

[0007] Preferably, the water volume proportions corresponding to each water level height information are calibrated one-to-one to form a water volume-height lookup table. The specific method is as follows: the different heights of the water medium inside the water tank are calibrated according to the resolution requirements, including the empty state of the water tank, the full state of the water tank and the corresponding states of different heights: first, the original height inside the water tank is obtained when the water tank is empty; secondly, the water tank is filled with a predetermined amount of water, and the corresponding height of the medium in the water tank is recorded after filling; finally, after the water tank is filled, the internal medium height when the water tank is full is recorded to form a water volume-height lookup table.

[0008] Preferably, the ultrasonic probe inside the water level sensor excites the piezoelectric material through an electrical signal to generate a beam, realizes ultrasonic signal emission control, and emits the beam outward at a specific angle. When the beam encounters the fire extinguishing medium, reflection occurs, and the reflected ultrasonic echo signal is received by the water level sensor through a specific angle. The water level height can be obtained through the relationship between the sound wave transmission distance d, the sound speed v and the sound transmission time t, d=vt / 2, and the water level data can be obtained through calibration.

[0009] The present invention also provides a method for monitoring water volume in a ground water tank using the system, comprising the following steps:

[0010] Step 1: Install the water level sensor on the top of the water tank, install the display panel on the outside of the machine body, and connect the water level sensor and the display panel with a cable;

[0011] Step 2: The water level sensor and the display panel are powered on respectively, and the self-test result of the water level sensor is displayed on the display panel. If the displayed result is normal, proceed to the next step, otherwise, the water level sensor is self-tested again;

[0012] Step three, the ultrasonic probe inside the water volume sensor excites the piezoelectric material through an electrical signal to generate a beam, realizes ultrasonic signal emission control, and emits the beam outward at a specific angle. When the beam encounters the fire extinguishing medium, reflection occurs, and the reflected ultrasonic echo signal is received by the water volume sensor at a specific angle. The water level height can be obtained through the relationship d=vt / 2 between the sound wave transmission distance d, the sound speed v and the sound transmission time t, and then the water volume data can be obtained through calibration; wherein, the calibration method is as follows: calibrate the different heights of the water medium inside the water tank according to the resolution requirements, including the empty state of the water tank, the full state of the water tank and the corresponding states of different heights: first, obtain the original height inside the water tank when the water tank is empty; secondly, fill the water tank with a predetermined amount of water, and record the corresponding height of the medium in the water tank after filling; finally, after the water tank is filled, record the internal medium height when the water tank is full, form a water volume-height lookup table, and complete the calibration work;

[0013] Step 4: The display panel displays the water volume data, and the filling situation is monitored in real time based on the displayed data, and the filling process can be stopped at any time as needed.

[0014] The invention also provides a special aircraft mission system designed based on the system.

[0015] The present invention also provides a special aircraft mission design method implemented based on the method.

[0016] (III) Beneficial effects

[0017] The ground water tank water level monitoring system and method of the present invention uses a non-contact method to measure the water level in real time, and transmits the measurement results to the water level panel for display, which is convenient for the filling personnel to monitor the filling situation in real time, improve the filling efficiency, and meet the requirements of rapid response and fire fighting. The water level sensor applies the ultrasonic ranging solution to the detection of the water level in the water tank of the fire-fighting aircraft. The real-time water level data can be obtained through the sensor without the need for external analysis equipment, and the original discrete measurement results are converted into real-time linear measurement results, which have better observability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of a ground water tank water volume monitoring system and method of the present invention. DETAILED DESCRIPTION

[0019] In order to make the purpose, content and advantages of the present invention more clear, the specific implementation methods of the present invention are further described in detail below in conjunction with the drawings and examples.

[0020] refer to Figure 1 The present invention provides a water volume monitoring system for a ground water tank, including a water volume sensor, a display panel and a cable. The water volume sensor is fixed on the top of the water tank and is not in direct contact with the medium (water) inside the water tank. An ultrasonic probe is arranged inside the water volume sensor, which can emit high-frequency ultrasonic pulses and receive the signal after being reflected by water. The height of the water level in the water tank can be calculated by calculating the time difference between ultrasonic emission and reception, and the water volume percentage corresponding to different heights can be obtained by calibration. The water volume sensor encapsulates information such as height and water volume percentage and sends it to the display panel through the RS422 bus. The parameters displayed on the display panel can monitor the liquid level height inside the water tank during filling in real time, thereby realizing fast and accurate monitoring of the filling situation of the water tank, having good real-time performance, effectively improving the filling efficiency, and having good application value.

[0021] There is a mounting hole on the top of the water tank. The water level sensor is shaped like a cylinder and is vertically fixed on the top of the water tank through an adapter plate to avoid contact with the medium inside the water tank. The display panel is fixed on the outside of the machine body and has a display screen to facilitate human-computer interaction. The water level sensor is connected to the display panel through a cable.

[0022] The ultrasonic probe inside the water level sensor is installed toward the bottom of the water tank.

[0023] The water level sensor is connected to the display panel via a cable and can be used for data interaction.

[0024] The display panel is installed outside the machine body, and the water volume information is analyzed and displayed on the display screen to provide information for the ground filling personnel.

[0025] There is a certain correspondence between the water level height and the water volume percentage. In view of the irregular shape of the water tank, the relationship between the water volume and the height of the water tank needs to be pre-calibrated, and the water volume percentage corresponding to each water level height information is matched one by one to form a water volume-height lookup table, which is convenient for the water volume sensor to query and obtain accurate information. The specific calibration method is: calibrate the different heights of the medium inside the water tank according to the resolution requirements, including the empty state of the water tank, the full state of the water tank and the corresponding states of different heights: first, the original height inside the water tank is obtained when the water tank is empty; secondly, fill the water tank according to the established water volume, and record the corresponding height of the medium in the water tank after filling; finally, after the water tank is filled, record the height of the internal medium when the water tank is full, form a water volume-height lookup table, and complete the calibration work.

[0026] A method for monitoring water volume in a ground water tank using the above system comprises the following steps:

[0027] Step 1: Install the water volume sensor on the top of the water tank, install the display panel on the outside of the machine body, and connect them with cables;

[0028] Step 2: The water level sensor and the display panel are powered on respectively, and the self-test result of the water level sensor is displayed on the display panel. If the displayed result is normal, proceed to the next step, otherwise, the water level sensor is self-tested again;

[0029] Step 3: Calibrate different heights of the medium inside the water tank according to the resolution requirements, including the empty state, full state and corresponding states of different heights: first, obtain the original height inside the water tank when the water tank is empty; second, fill the water tank with a predetermined amount of water, and record the corresponding height of the medium inside the water tank after filling; finally, after the water tank is filled, record the height of the medium inside the water tank when the water tank is full, form a water volume-height lookup table, and complete the calibration work;

[0030] Step 4: The ground filling personnel monitor the filling situation in real time based on the data displayed on the water volume panel and stop the filling process at any time as needed.

[0031] The traditional water tank water volume measurement has problems such as the inability to monitor in real time and low filling efficiency. The inability to quickly complete real-time filling may cause delays in fire extinguishing. The ground water tank water volume monitoring system and method of the present invention uses a non-contact method to measure the water volume height in real time, and transmits the measurement results to the water volume panel for display, which is convenient for filling personnel to monitor the filling situation in real time, improve filling efficiency, and meet the requirements of rapid response and fire extinguishing.

[0032] The water level sensor calculates the water level information by calculating the time difference between ultrasonic emission and return. The water level sensor is equipped with an ultrasonic generator inside. It generates a beam by exciting the piezoelectric material through an electrical signal to realize ultrasonic signal emission control and emit the beam outward at a specific angle. When the beam encounters the fire extinguishing medium, reflection occurs. The reflected ultrasonic echo signal is received by the water level sensor at a specific angle. The liquid level height can be obtained through the relationship between the sound wave transmission distance d, the sound speed v and the sound transmission time t (d=vt / 2), and then the water level data can be obtained through calibration. The final water level status of the water tank is obtained through software filtering and the water level data is output in real time through the RS422 bus.

[0033] It can independently complete ground water filling without the cooperation of other systems, and is suitable for water tanks of various shapes. It can be adapted through prior calibration and monitor the filling situation in real time. The water volume sensor adopts non-contact installation and is installed on the top of the water tank. It completes the real-time measurement of the water level height of the water tank through ultrasonic ranging, and can display the water volume information through the water volume panel, which is convenient for the filling personnel to grasp the filling situation and improve the filling efficiency. The water volume sensor creatively applies the ultrasonic ranging solution to the detection of the water volume of the water tank of the fire-fighting aircraft. The real-time water volume data can be obtained through the sensor without the need for external analysis equipment, and the original discrete measurement results are converted into real-time linear measurement results, which have better observability.

[0034] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A water tank water level ground monitoring system based on ultrasonic ranging, characterized in that: It includes a water volume sensor and a display panel; the water volume sensor is fixed on the top of the water tank and does not directly contact the water medium inside the water tank; an ultrasonic probe is arranged inside the water volume sensor and is installed toward the bottom of the water tank, which can emit high-frequency ultrasonic pulses and receive the signals reflected by the water, and the height of the water level in the water tank is calculated by calculating the time difference between the ultrasonic emission and reception, and the water volume proportion corresponding to each height information of the water level is calibrated one by one to form a water volume-height lookup table, so as to obtain the water volume percentage corresponding to different heights; the water volume sensor encapsulates the height and water volume percentage information and sends it to the display panel through the RS422 bus, and the parameters displayed on the display panel can be used to monitor the internal liquid level of the water tank during filling in real time, thereby realizing the monitoring of the filling situation of the water tank.

2. The system according to claim 1, characterized in that Through calibration, the water volume proportion corresponding to each water level height information is matched one by one to form a water volume-height lookup table. The specific method is as follows: according to the resolution requirements, the different heights of the water medium inside the water tank are calibrated, including the empty state of the water tank, the full state of the water tank and the corresponding states of different heights: first, the original height inside the water tank is obtained when the water tank is empty; secondly, the water tank is filled with a predetermined amount of water, and the corresponding height of the medium in the water tank is recorded after filling; finally, after the water tank is filled, the height of the internal medium when the water tank is full is recorded to form a water volume-height lookup table.

3. The system according to claim 2, characterized in that The ultrasonic probe inside the water level sensor excites the piezoelectric material through an electrical signal to generate a beam, realizes the ultrasonic signal emission control, and emits the beam outward at a specific angle. When the beam encounters the fire extinguishing medium, reflection occurs. The reflected ultrasonic echo signal is received by the water level sensor at a specific angle. The water level height can be obtained through the relationship between the sound wave transmission distance d, the sound speed v and the sound transmission time t (d=vt / 2), and the water volume data can be obtained through calibration.

4. The system according to claim 3, characterized in that The water volume sensor is vertically fixed on the top of the water tank through an adapter plate.

5. The system according to claim 4, characterized in that The display panel is fixed outside the machine body and has a display screen. The water volume information is analyzed and displayed on the display screen. The water volume sensor is connected to the display panel through a cable.

6. The system according to any one of claims 3 to 5, characterized in that The system is used in the field of special aircraft mission system technology.

7. A method for monitoring water volume in a ground water tank using the system as claimed in any one of claims 3 to 6, characterized in that: The following steps are involved: Step 1: Install the water level sensor on the top of the water tank, install the display panel on the outside of the machine body, and connect the water level sensor and the display panel with a cable; Step 2: The water level sensor and the display panel are powered on respectively, and the self-test result of the water level sensor is displayed on the display panel. If the displayed result is normal, proceed to the next step, otherwise, the water level sensor is self-tested again; Step three, the ultrasonic probe inside the water volume sensor excites the piezoelectric material through an electrical signal to generate a beam, realizes ultrasonic signal emission control, and emits the beam outward at a specific angle. When the beam encounters the fire extinguishing medium, reflection occurs, and the reflected ultrasonic echo signal is received by the water volume sensor at a specific angle. The water level height can be obtained through the relationship d=vt / 2 between the sound wave transmission distance d, the sound speed v and the sound transmission time t, and then the water volume data can be obtained through calibration; wherein, the calibration method is as follows: calibrate the different heights of the water medium inside the water tank according to the resolution requirements, including the empty state of the water tank, the full state of the water tank and the corresponding states of different heights: first, obtain the original height inside the water tank when the water tank is empty; secondly, fill the water tank with a predetermined amount of water, and record the corresponding height of the medium in the water tank after filling; finally, after the water tank is filled, record the internal medium height when the water tank is full, form a water volume-height lookup table, and complete the calibration work; Step 4: The display panel displays the water volume data, and the filling situation is monitored in real time based on the displayed data, and the filling process can be stopped at any time as needed.

8. The method according to claim 7, characterized in that The method is applied in the technical field of special aircraft mission systems.

9. A special aircraft mission system based on the system design according to any one of claims 1 to 6.

10. A method for designing a special aircraft mission based on the method according to claim 7 or 8.

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