Liquid level telemetering system and method

Abstract

The invention provides a liquid level telemetering system and method, and the system comprises a liquid storage cabin which is used for storing a liquid solution; the high-position piezoelectric sensor is arranged above the liquid storage cabin; the low-position piezoelectric sensor is arranged below the liquid storage cabin; the high-position piezoelectric type sensor is connected with the liquid level telemetering and liquid level height conversion system through a high-position relay junction box, and the low-position piezoelectric type sensor is connected with the liquid level telemetering and liquid level height conversion system through a low-position relay junction box. The invention provides a liquid level telemetering system and a liquid level telemetering method, which solve the problem that the existing liquid level telemetering system cannot process the liquid level height with additional air pressure, and eliminate the influence of the additional air pressure of a liquid storage cabin, thereby measuring the liquid level height.

Description

Technical Field

[0001] The invention belongs to the technical field of liquid level measurement in a ship cabin, and in particular relates to a liquid level remote sensing system and method. Background Art

[0002] Existing ships have liquid level telemetry in tanks that store liquids, and these tanks that store liquids have no additional gas pressure.

[0003] A piezoelectric liquid level sensor or a bubble blowing liquid level measurement system is installed in the liquid storage chamber to remotely measure the liquid level height of the chamber.

[0004] In the case of additional gas pressure in the cabin, existing technology cannot remotely measure the liquid level height in the cabin. Summary of the invention

[0005] The present invention provides a liquid level remote sensing system, comprising:

[0006] a liquid storage compartment for storing a liquid solution;

[0007] A high-position piezoelectric sensor is disposed above the liquid storage compartment;

[0008] A low-position piezoelectric sensor is disposed below the liquid storage compartment;

[0009] The liquid level telemetry liquid level height conversion system, the high-level piezoelectric sensor is connected to the liquid level telemetry liquid level height conversion system through a high-level relay junction box, and the low-level piezoelectric sensor is connected to the liquid level telemetry liquid level height conversion system through a low-level relay junction box.

[0010] In some optional embodiments: the high-position piezoelectric sensor is located inside the liquid storage compartment, and a probe of the high-position piezoelectric sensor is lower than a top wall of the liquid storage compartment.

[0011] In some optional embodiments: the high-position piezoelectric sensor is located above the outside of the liquid storage compartment, and a probe of the high-position piezoelectric sensor is higher than the top wall of the liquid storage compartment.

[0012] In some optional embodiments: the high-level relay junction box, the low-level relay junction box, and the liquid level telemetry liquid level height conversion system are located outside the liquid storage compartment.

[0013] In addition to the above-mentioned liquid level telemetry system, the present invention also provides a liquid level telemetry method based on any of the above-mentioned liquid level telemetry systems, measuring the top pressure P2 of the liquid storage chamber by a high-position piezoelectric sensor, and measuring the bottom pressure P1 of the liquid storage chamber by a low-position piezoelectric sensor;

[0014] P1=ρ*g*h1+Pa, P2=ρ*g*h2+Pa;

[0015] in:

[0016] ρ, density of liquid stored in liquid storage compartment, seawater is taken as 1025kg / m3;

[0017] g, gravitational acceleration, constant, value is 9.81N / kg;

[0018] h1, height difference between the position of the low-position piezoelectric sensor and the liquid level in the liquid storage compartment;

[0019] h2, the height difference between the position of the high-position piezoelectric sensor and the liquid level in the liquid storage compartment;

[0020] Pa, air pressure in the liquid storage compartment;

[0021] Then △P=P1-P2=ρ*g*(h1-h2);

[0022] Calculate the liquid height difference h between the low-position piezoelectric sensor and the high-position piezoelectric sensor, and add the height Hl of the low-position piezoelectric sensor from the bottom to get h+Hl, which is used as the liquid level height of the liquid storage chamber.

[0023] In some optional embodiments: when the liquid level in the cabin is lower than the installation position of the high-level piezoelectric sensor, the theoretical error is 0.

[0024] Further: when the liquid level in the liquid storage compartment is higher than the installation position of the high-position piezoelectric sensor, the theoretical error is the height difference between the high-position sensor and the liquid level.

[0025] Further: the maximum value is the height difference Hh between the top of the liquid storage compartment and the high position sensor.

[0026] Further:

[0027] The high-position piezoelectric sensor converts the measured pressure signal into an electrical signal and sends it to the high-position relay junction box;

[0028] The low-position piezoelectric sensor converts the measured pressure signal into an electrical signal and sends it to the low-position relay junction box.

[0029] Further:

[0030] The high-level relay junction box sends the electrical signal of the high-level piezoelectric sensor to the liquid level telemetry liquid level height conversion system;

[0031] The low-level relay junction box sends the electrical signal of the low-level piezoelectric sensor to the liquid level telemetry liquid level height conversion system.

[0032] The beneficial effects brought by the present invention are as follows:

[0033] It can be seen from the above scheme that the present invention provides a liquid level telemetry system and method, which solves the problem that the existing liquid level telemetry system cannot handle the liquid level height with additional air pressure, eliminates the influence of the additional gas pressure in the liquid storage chamber, and thus measures the liquid level height. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 A schematic diagram showing the structural arrangement of an implementation scheme of a liquid level remote sensing system provided by the present invention;

[0035] Figure 2 A schematic diagram showing the structural layout of another embodiment of a liquid level remote sensing system provided by the present invention.

[0036] In the figure, 1 is a high-level piezoelectric sensor; 2 is a low-level piezoelectric sensor; 3 is a high-level relay junction box; 4 is a low-level relay junction box; 5 is a liquid level telemetry liquid level height conversion system; and 6 is a liquid storage compartment. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] like Figure 1 to Figure 2 As shown, the present invention provides a liquid level remote sensing system, comprising:

[0039] A liquid storage compartment 6, for storing a liquid solution;

[0040] A high-position piezoelectric sensor 1 is arranged above the liquid storage compartment 6;

[0041] A low-position piezoelectric sensor 2 is disposed below the liquid storage compartment 6;

[0042] The liquid level telemetry liquid level height conversion system 5, the high-level piezoelectric sensor 1 is connected to the liquid level telemetry liquid level height conversion system 5 through the high-level relay junction box 3, and the low-level piezoelectric sensor 2 is connected to the liquid level telemetry liquid level height conversion system 5 through the low-level relay junction box 4.

[0043] The high-position piezoelectric sensor 1 converts the measured pressure signal into an electrical signal and sends it to the high-position relay junction box 3;

[0044] The low-level piezoelectric sensor 2 converts the measured pressure signal into an electrical signal and sends it to the low-level relay junction box 4 .

[0045] The high-level relay junction box 3 sends the electrical signal of the high-level piezoelectric sensor 1 to the liquid level telemetry liquid level height conversion system 5;

[0046] The low-level relay junction box 4 sends the electrical signal of the low-level piezoelectric sensor 2 to the liquid level remote sensing liquid level height conversion system 5 .

[0047] In some optional embodiments: the high-level relay junction box 3 , the low-level relay junction box 4 , and the liquid level telemetry liquid level height conversion system 5 are located outside the liquid storage compartment 6 .

[0048] The liquid level telemetry liquid level height conversion system 5 converts the electrical signal into a pressure value, and then calculates the liquid level height value based on the pressure value.

[0049] It can be seen from the above scheme that the present invention provides a liquid level remote sensing system, which can remotely measure the liquid level height of the liquid storage chamber 6 with additional gas pressure through the arrangement of a high-level piezoelectric sensor 1 and a low-level piezoelectric sensor 2, and the setting of a liquid level remote sensing liquid level height conversion system 5.

[0050] There are two embodiments for arranging the high-position piezoelectric sensor 1 .

[0051] In a first optional implementation manner: the high-position piezoelectric sensor 1 is located inside the liquid storage compartment 6 , and the probe of the high-position piezoelectric sensor 1 is lower than the top wall of the liquid storage compartment 6 .

[0052] In a first optional implementation manner: the high-position piezoelectric sensor 1 is located above the outside of the liquid storage compartment 6 , and the probe of the high-position piezoelectric sensor 1 is higher than the top wall of the liquid storage compartment 6 .

[0053] Those skilled in the art can select one of the arrangements as needed.

[0054] In addition to the above-mentioned liquid level telemetry system, the present invention also provides a liquid level telemetry method based on any of the above-mentioned liquid level telemetry systems, wherein the pressure P2 at the top of the liquid storage chamber 6 is measured by the high-position piezoelectric sensor 1, and the pressure P1 at the bottom of the liquid storage chamber 6 is measured by the low-position piezoelectric sensor 2;

[0055] P1=ρ*g*h1+Pa, P2=ρ*g*h2+Pa;

[0056] in:

[0057] ρ, density of the liquid stored in the liquid storage compartment 6, the value of seawater is 1025 kg / m3;

[0058] g, gravitational acceleration, constant, value is 9.81N / kg;

[0059] h1, the height difference between the position of the low-position piezoelectric sensor 2 and the liquid level of the liquid storage chamber 6;

[0060] h2, the height difference between the position of the high-position piezoelectric sensor 1 and the liquid level of the liquid storage chamber 6;

[0061] Pa, air pressure in the liquid storage compartment;

[0062] Then △P=P1-P2=ρ*g*(h1-h2);

[0063] Calculate the liquid height difference h between the low-position piezoelectric sensor 2 and the high-position piezoelectric sensor 1, and add the height H1 of the low-position piezoelectric sensor 2 from the bottom to get h+H1, which is used as the liquid level height of the liquid storage chamber 6.

[0064] In some optional embodiments: when the liquid level in the cabin is lower than the installation position of the high-level piezoelectric sensor 1, the theoretical error is 0.

[0065] Further: when the liquid level in the liquid storage chamber 6 is higher than the installation position of the high-position piezoelectric sensor 1, the theoretical error is the height difference between the high-position sensor and the liquid level.

[0066] Further: the maximum value is the height difference Hh between the top of the liquid storage compartment 6 and the high position sensor.

[0067] The beneficial effects brought by the present invention are as follows:

[0068] It can be seen from the above scheme that the present invention provides a liquid level telemetry system and method, which solves the problem that the existing liquid level telemetry system cannot handle the liquid level height with additional air pressure, eliminates the influence of the additional gas pressure in the liquid storage chamber 6, and thus measures the liquid level height.

[0069] According to the arrangement of the liquid storage compartment 6, two arrangement modes are designed to reduce the measurement error as much as possible according to different arrangements of the liquid storage compartment 6.

[0070] The above are preferred embodiments 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 principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A liquid level remote sensing system, characterized in that: include: a liquid storage compartment for storing a liquid solution; A high-position piezoelectric sensor is disposed above the liquid storage compartment; A low-position piezoelectric sensor is disposed below the liquid storage compartment; The liquid level telemetry liquid level height conversion system, the high-level piezoelectric sensor is connected to the liquid level telemetry liquid level height conversion system through a high-level relay junction box, and the low-level piezoelectric sensor is connected to the liquid level telemetry liquid level height conversion system through a low-level relay junction box.

2. The liquid level remote sensing system according to claim 1, characterized in that: The high-position piezoelectric sensor is located inside the liquid storage compartment, and a probe of the high-position piezoelectric sensor is lower than the top wall of the liquid storage compartment.

3. The liquid level remote sensing system according to claim 1, characterized in that: The high-position piezoelectric sensor is located above the outside of the liquid storage compartment, and a probe of the high-position piezoelectric sensor is higher than the top wall of the liquid storage compartment.

4. The liquid level remote sensing system according to claim 1, characterized in that: The high-level relay junction box, the low-level relay junction box, and the liquid level telemetry liquid level height conversion system are located outside the liquid storage compartment.

5. A liquid level remote sensing method based on the liquid level remote sensing system according to any one of claims 1 to 4, characterized in that: The pressure P2 at the top of the liquid storage chamber is measured by a high-position piezoelectric sensor, and the pressure P1 at the bottom of the liquid storage chamber is measured by a low-position piezoelectric sensor; P1=ρ*g*h1+Pa, P2=ρ*g*h2+Pa; in: ρ, density of liquid stored in liquid storage compartment, seawater is taken as 1025kg / m3; g, gravitational acceleration, constant, value is 9.81N / kg; h1, height difference between the position of the low-position piezoelectric sensor and the liquid level in the liquid storage compartment; h2, the height difference between the position of the high-position piezoelectric sensor and the liquid level in the liquid storage compartment; Pa, air pressure in the liquid storage compartment; Then △P=P1-P2=ρ*g*(h1-h2); Calculate the liquid height difference h between the low-position piezoelectric sensor and the high-position piezoelectric sensor, and add the height Hl of the low-position piezoelectric sensor from the bottom to get h+Hl, which is used as the liquid level height of the liquid storage chamber.

6. The liquid level remote sensing method according to claim 5, characterized in that: When the liquid level in the cabin is lower than the installation position of the high-level piezoelectric sensor, the theoretical error is 0.

7. The liquid level remote sensing method according to claim 6, characterized in that: When the liquid level in the liquid storage compartment is higher than the installation position of the high-level piezoelectric sensor, the theoretical error is the height difference between the high-level sensor and the liquid level.

8. The liquid level remote sensing method according to claim 7, characterized in that: The maximum value is the height difference Hh between the top of the liquid storage compartment and the high-level sensor.

9. The liquid level remote sensing method according to claim 8, characterized in that: The high-position piezoelectric sensor converts the measured pressure signal into an electrical signal and sends it to the high-position relay junction box; The low-position piezoelectric sensor converts the measured pressure signal into an electrical signal and sends it to the low-position relay junction box.

10. The liquid level remote sensing method according to claim 9, characterized in that: The high-level relay junction box sends the electrical signal of the high-level piezoelectric sensor to the liquid level telemetry liquid level height conversion system; The low-level relay junction box sends the electrical signal of the low-level piezoelectric sensor to the liquid level telemetry liquid level height conversion system.

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