Fire engine liquid level monitoring display system

Abstract

The utility model relates to fire control monitoring display technical field, more particularly to a kind of fire engine liquid level monitoring display system, including liquid level lamp, controller and sensor, liquid level lamp is installed in the outside of fire engine liquid storage tank, is made of multiple linear arrangement's light emitting unit, for showing liquid level information in liquid storage tank;Controller is electrically connected with liquid level lamp and sensor, powers liquid level lamp and processes sensor signal;Sensor acquires liquid level data by pressure detection and transmits to controller.Liquid level lamp adopts transparent main body frame, is equipped with needle seat type interface and controller quick plug, sensor is sealedly connected with controller through screw thread interface.Controller integrates anti-reverse connection protection, hardware filter circuit and range calibration module, can accurately process signal and drive liquid level lamp dynamic display liquid level state.The utility model solves the technical problems, such as traditional liquid level monitoring device reading difficulty, easily disturbed, single display etc.

Description

Technical Field

[0001] This utility model relates to the field of packaging anti-counterfeiting technology, and in particular to a fire truck liquid level monitoring and display system. Background Technology

[0002] In fire and rescue operations, fire trucks are crucial firefighting equipment, and the real-time monitoring of the liquid level in their storage tanks is directly related to the success or failure of the rescue operation.

[0003] Currently, traditional fire truck liquid level monitoring methods mostly employ mechanical pointer-type liquid level gauges or simple float-type liquid level sensors. Mechanical pointer-type liquid level gauges require operators to observe them at close range, making it difficult for operators to quickly and accurately obtain liquid level information in complex rescue scenes, and they also suffer from large reading errors. While float-type liquid level sensors can achieve a certain degree of automated monitoring, the float is easily interfered with during the movement of the vehicle when the liquid is violently sloshing, resulting in inaccurate liquid level monitoring data and failing to provide firefighters with reliable liquid level information.

[0004] Furthermore, existing liquid level display devices are often single-function and cannot intuitively and clearly display changes in liquid level, making it difficult to meet the needs of firefighters for rapid assessment of liquid levels in storage tanks during emergency rescue scenarios. With the increasing demands for efficiency and accuracy in firefighting operations, there is an urgent need for a monitoring and display system capable of real-time and accurate monitoring of liquid levels in fire truck storage tanks and displaying the liquid level information in an intuitive manner. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a fire truck liquid level monitoring and display system.

[0006] The system addresses the technical problems of traditional fire truck liquid level monitoring, such as difficulty in reading, large errors, susceptibility to interference, and limited display methods.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] This utility model provides a fire truck liquid level monitoring and display system, characterized in that it includes a liquid level lamp, a controller and a sensor; the liquid level lamp is installed outside the fire truck's liquid storage tank, the controller is electrically connected to the liquid level lamp and the sensor respectively, and the liquid level lamp includes a main frame and at least three light-emitting units, the light-emitting units being arranged linearly within the main frame of the liquid level lamp;

[0009] The sensor is used to collect the liquid pressure in the storage tank and convert it into an electrical signal, which is then transmitted to the controller. The controller is used to drive the liquid level lamp to display different states according to the information collected by the sensor and through a driver program. The liquid level lamp is used to indicate the liquid level height by individually switching the brightness display state of each light-emitting unit according to the instructions issued by the controller.

[0010] The present invention is further configured such that the main frame of the liquid level lamp is made of transparent material;

[0011] The main frame of the liquid level lamp is equipped with mounting mechanisms at both ends for fixing the liquid level lamp to the outside of the fire truck's liquid storage tank.

[0012] The present invention is further configured such that: the main frame of the liquid level lamp is provided with a pin-type interface, and the controller is provided with a pin-type interface that is connected to it; the pin-type interface is provided with an elastic contact piece inside, and the elastic contact piece contacts the pin of the pin-type interface.

[0013] The present invention is further configured such that: the sensor is provided with a threaded connector, the threaded connector is provided with an output interface, the controller is provided with a sleeve interface for receiving sensor signals, the sleeve interface is provided with an internal thread that mates with the threaded connector, and a sealing gasket is provided at the connection between the sleeve interface and the threaded connector.

[0014] The present invention is further configured such that: the controller has an integrated power management module with reverse connection protection to prevent damage to the controller due to reverse polarity connection of the power supply.

[0015] The present invention is further configured such that: the controller is equipped with an analog sampling circuit with hardware-level filtering circuit, which samples, converts and filters out interference signals from the original analog signal transmitted by the sensor.

[0016] The present invention is further configured such that: the controller integrates a range calibration processing module adapted to sensors with different ranges.

[0017] In summary, this invention offers the following advantages: By combining a level indicator and a sensor, it achieves real-time, accurate monitoring and intuitive visualization of the liquid level in fire truck storage tanks. Compared to traditional mechanical pointer or float level gauges, it uses a pressure sensor to collect level data and converts it into an electrical signal via a controller to drive the level indicator, avoiding reading errors caused by liquid sloshing and significantly improving the reliability of the monitoring data. The level indicator employs a linear arrangement of multiple light-emitting units, combined with a transparent main frame, clearly displaying changes in liquid level height, meeting the needs of firefighters to quickly determine the liquid volume in emergency rescue scenarios. Furthermore, the controller incorporates reverse connection protection, hardware filtering, and range calibration modules, enhancing the system's anti-interference capability and environmental adaptability. The modular design of the pin-type and threaded interfaces simplifies installation and maintenance, balancing efficiency and safety, and providing a stable and reliable level monitoring solution for firefighting operations. Attached Figure Description

[0018] Figure 1This is a schematic diagram of the product's structure in use according to this utility model;

[0019] Figure 2 This is a schematic diagram of the liquid level lamp structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the controller structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the sensor structure of this utility model;

[0022] Figure 5 This is the hardware circuit topology diagram of this utility model;

[0023] Figure 6 This is a software processing flowchart of this utility model.

[0024] Reference numerals: 1. Liquid level lamp; 2. Controller; 3. Sensor; 10. Light-emitting unit; 11. Main frame; 12. Mounting mechanism; 101. Pin-type interface; 102. Pin-type interface; 301. Threaded connector. Detailed Implementation

[0025] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] Example 1:

[0027] See Figures 1-6 This utility model provides a fire truck liquid level monitoring and display system, which includes a liquid level light 1, a controller 2, and a sensor 3. The liquid level light 1 is installed on the outside of the fire truck's liquid storage tank and is used to display the liquid level information inside the tank. By collecting the liquid level information in the tank in real time and displaying it through the liquid level light 1, firefighters can understand the liquid level status inside the tank at any time from outside the fire truck without having to manually open the tank to check, thus improving work efficiency and convenience. At the same time, placing the liquid level light 1 on the outside of the fire truck's liquid storage tank avoids the dangers that firefighters may face when approaching or opening the tank, such as liquid splashing or leakage of toxic or harmful gases, thus ensuring the personal safety of firefighters.

[0028] The controller 2 is electrically connected to the liquid level lamp 1 and the sensor 3. It supplies power to the liquid level lamp 1, collects signals from the sensor 3, and converts them into signals that drive the liquid level lamp 1 to emit light. The sensor 3 is used to collect the liquid pressure in the storage tank and convert it into an electrical signal that is transmitted to the controller 2. By accurately collecting the liquid pressure through the sensor 3 and converting it through the algorithm of the controller 2, the liquid level height in the storage tank can be reflected more accurately, avoiding errors caused by manual estimation or other inaccurate measurement methods.

[0029] The liquid level lamp 1 includes at least three light-emitting units 10 and a main frame 11. The light-emitting units 10 are arranged linearly within the main frame 11 of the liquid level lamp 1. The at least three light-emitting units 10 arranged linearly within the main frame 11 can intuitively display the liquid level through different light-emitting states. The light-emitting units 10 are light-emitting components such as RGB lamp beads or LED light strips, and the light-emitting color can be set to multiple colors such as blue, green, red, and yellow to distinguish different liquid tank media.

[0030] In actual use, when there is no water or the liquid level is low, the liquid level light 1 flashes red; when the liquid level is full, the liquid level light 1 is fully lit in blue; and the yellow liquid level light 1 in the middle position changes linearly, displaying the liquid level height in real time and avoiding errors from manual estimation.

[0031] Preferably, sensor 2 and controller 3 can be of the following models:

[0032] Honeywell MLH series pressure level sensors, Rosemount 3051L pressure transmitter, Danfoss MBS3000 pressure sensor;

[0033] Siemens S7-1200 PLC, Schneider Electric Modicon M221 PLC, Infineon SAK-XC886CM-8FFA 5V AC.

[0034] Example 2:

[0035] This embodiment is based on the above embodiment, such as Figure 2 As shown in this embodiment, the main frame 11 of the liquid level lamp 1 is made of transparent material, such as polycarbonate or acrylic. The transparent frame can minimize the obstruction of light from the light-emitting unit, making the liquid level lamp brighter and clearer when displaying liquid level information. Even in complex lighting environments, it can ensure that firefighters can clearly identify the liquid level status.

[0036] Furthermore, the main frame 11 of the liquid level lamp 1 is provided with mounting mechanisms 12 at both ends for fixing the liquid level lamp 1 to the outside of the fire truck's liquid storage tank. The mounting mechanism 12 improves the ease and stability of installing the liquid level lamp on the fire truck's liquid storage tank. The mounting mechanism 12 can be set as a protruding structure, which cooperates with the pre-set groove on the outside of the liquid storage tank to achieve quick positioning and installation, reducing the installation difficulty and time cost; the mounting mechanism 12 can also be set as a spiral structure, which achieves a fixing effect through nuts, effectively preventing the liquid level lamp 1 from loosening during the vibration of the fire truck's movement, and ensuring that the liquid level lamp always stably displays liquid level information.

[0037] Example 3:

[0038] This embodiment is based on the above embodiment, such as Figure 3As shown in this embodiment, the main frame 11 of the level lamp 1 is provided with a pin-type interface 101, and the controller 2 is provided with a pin-type interface 102 that mates with it. The pin-type interface 102 has an elastic contact piece inside, which contacts the pins of the pin-type interface 101. On the one hand, the connection method between the pin-type interface 101 and the pin-type interface 102 is simple, which facilitates the quick installation and disassembly of the level lamp 1 and the controller 2. During system maintenance or component replacement, operators can easily plug and unplug components, saving a lot of time and effort. For example, in emergency repairs of the level monitoring and display system, this convenient connection method can greatly improve maintenance efficiency.

[0039] On the other hand, the elastic contact piece inside the pin-type interface 102 makes tight contact with the pins of the pin-type interface 101. Fire trucks experience vibrations and shaking during operation, and the elastic contact piece effectively cushions these vibrations, preventing loose connections and ensuring stable electrical signal transmission.

[0040] Example 4:

[0041] This embodiment is based on the above embodiment, such as Figure 4 As shown, in this embodiment, the output interface of sensor 3 is a threaded connector 301, which mates with the internally threaded sleeve interface on controller 2, and a sealing gasket is provided at the connection. Regarding connection stability, the fire truck will generate vibrations during operation; the threaded connection can resist these vibrations, preventing the connection between sensor 3 and controller 2 from becoming loose, ensuring stable signal transmission, and thus enabling the liquid level monitoring and display system to operate normally.

[0042] In terms of sealing performance, the sealing gasket can prevent external dust, moisture and other impurities from entering the connection parts, avoid short circuits, corrosion and other problems, extend the service life of sensor 3 and controller 2, and ensure stable system operation.

[0043] Example 5:

[0044] This embodiment is based on the above embodiment, such as Figures 5-6As shown in this embodiment, the controller 2 integrates a reverse connection protection power management module to prevent damage to the controller 2 due to reverse power polarity connection. This reverse connection protection power management module can be implemented using diode unidirectional conduction or MOSFET detection and control. When the power polarity is reversed, the diode is cut off or the MOSFET is turned off, cutting off the reverse current path. Based on the control characteristics of electronic components on current flow direction, by blocking the reverse current, critical components inside the controller 2 are prevented from burning out due to reverse power connection. This not only extends the service life of the controller 2 and reduces maintenance costs, but also ensures the stable operation of the liquid level monitoring and display system during fire truck operations, providing reliable liquid level data for firefighting operations. Simultaneously, it effectively reduces the risk of malfunctions and safety hazards caused by operators accidentally connecting the power supply, improving operational safety and system reliability.

[0045] Furthermore, the controller 2 is equipped with an analog sampling circuit with hardware-level filtering circuitry to sample, convert, and filter out interference signals from the raw analog signal transmitted by the sensor 3. The analog sampling circuit of the controller 2 achieves anti-interference and data processing, working collaboratively in multiple ways. Regarding the hardware-level filtering circuitry, a passive RC or LC filter circuit can be used, utilizing the impedance characteristics of resistors, capacitors, and inductors for signals of different frequencies, connected in series between the signal output terminal of the sensor 3 and the sampling input terminal of the controller 2 to effectively bypass high-frequency interference. Alternatively, an active operational amplifier filter circuit can be used, achieving low-pass filtering by setting feedback and input networks, matching signal characteristics, and improving the filtering effect. During analog sampling and conversion, the sample-and-hold circuit first quickly captures and holds the output voltage of the sensor 3. After isolation by a buffer amplifier, it is converted into a digital signal at a set frequency, and then linearly transformed according to a pre-calibrated proportional coefficient and offset to convert the digital signal into a liquid level value. Meanwhile, the analog sampling circuit and other components are rationally partitioned, and short, thick analog signal transmission lines are used with shielding to reduce interference between different circuits. Ultimately, this achieves accurate sampling, conversion, and interference filtering of the original analog signal from sensor 3, providing reliable data for liquid level monitoring.

[0046] Furthermore, the controller 2 integrates a range calibration processing module adapted to sensors 3 with different ranges. In practical applications, fire truck storage tanks vary in specifications, and the ranges of the sensors 3 used also differ, ranging from low-range sensors specifically for small storage tanks to high-range sensors for large storage tanks. This module can automatically adjust parameters according to the range type of the connected sensor 3, performing targeted linear conversion and compensation calculations on the raw signals collected by the sensor. For example, when a low-range sensor is connected, the module refines the signal processing accuracy to ensure accurate reflection of even minute changes in liquid level; when a high-range sensor is connected, it optimizes the data processing range to avoid data overflow or distortion. This allows the same controller 2 to adapt to sensors 3 with multiple ranges, eliminating the need to develop separate controllers for different range sensors, reducing R&D and production costs, facilitating equipment maintenance and upgrades, and enhancing the versatility and practicality of the entire liquid level monitoring and display system.

[0047] Example 6:

[0048] This embodiment is based on the above embodiment, such as Figure 1 , Figure 2 , Figure 5 , Figure 6 As shown, in this embodiment, the driver program of the controller 2 drives the liquid level lamp to present different display states based on the liquid level information collected by the sensor 3. Specifically, the driver program of the controller 2 precisely controls the liquid level lamp to present differentiated display states based on the liquid level information collected by the sensor 3, setting the unlit light-emitting unit 10 to work at 10% brightness when the liquid level is not full. From a functional perspective, the low-brightness light-emitting unit 10 can clearly indicate to the operator that the current liquid level is not full in nighttime or low-light environments, avoiding misjudgment of information due to a completely dark state, while also avoiding visual interference caused by excessive brightness. From a practical perspective, working at 10% brightness significantly reduces energy consumption, reduces heat generation and aging rate of the light-emitting unit, extends its service life, and reduces the consumption of the vehicle's battery, ensuring the stable operation of the fire truck's electrical system and enabling the liquid level lamp to maintain stable and reliable display performance during long-term use.

[0049] The embodiments described above merely illustrate specific implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A fire truck liquid level monitoring and display system, characterized in that, The monitoring and display system includes a liquid level lamp (1), a controller (2), and a sensor (3); the liquid level lamp (1) is installed outside the fire truck's liquid storage tank, and the controller (2) is electrically connected to the liquid level lamp (1) and the sensor (3) respectively. The liquid level lamp (1) includes a main frame (11) and at least three light-emitting units (10), and the light-emitting units (10) are arranged linearly inside the main frame (11) of the liquid level lamp (1). The sensor (3) is used to collect the liquid pressure in the storage tank and convert it into an electrical signal to be transmitted to the controller (2); the controller (2) is used to drive the liquid level lamp to present different display states according to the information collected by the sensor (3) through the driver program; the liquid level lamp (1) is used to indicate the liquid level height by individually switching the brightness display state of each light-emitting unit (10) according to the instructions issued by the controller (2).

2. The fire truck liquid level monitoring and display system according to claim 1, characterized in that: The main frame (11) of the liquid level lamp (1) is made of transparent material; The main frame (11) of the liquid level lamp (1) is provided with installation mechanisms (12) at both ends for fixing the liquid level lamp (1) to the outside of the fire truck's liquid storage tank.

3. The fire truck liquid level monitoring and display system according to claim 2, characterized in that: The main frame (11) of the liquid level lamp (1) is provided with a pin socket interface (101), and the controller (2) is provided with a pin-type interface (102) that is connected to it. The pin-type interface (102) is provided with an elastic contact piece inside, and the elastic contact piece contacts the pin of the pin socket interface (101).

4. The fire truck liquid level monitoring and display system according to claim 1, characterized in that: The sensor (3) is provided with a threaded connector (301), and the threaded connector (301) is provided with an output interface. The controller (2) is provided with a sleeve interface for receiving the signal from the sensor (3). The sleeve interface is provided with an internal thread that mates with the threaded connector (301). A sealing gasket is provided at the connection between the sleeve interface and the threaded connector (301).

5. The fire truck liquid level monitoring and display system according to any one of claims 1-4, characterized in that: The controller (2) has an integrated reverse polarity protection power management module. The power management module is used to prevent the controller (2) from being damaged due to reverse polarity connection.

6. The fire truck liquid level monitoring and display system according to claim 5, characterized in that: The controller (2) is equipped with an analog sampling circuit with hardware-level filtering circuit. The analog sampling circuit is used to sample, convert and filter out interference signals from the original analog signal transmitted by the sensor (3).

7. The fire truck liquid level monitoring and display system according to claim 6, characterized in that: The controller (2) integrates a range calibration processing module for matching the range sensor (3).

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