Remaining water quantity display device for tank body of sanitation truck

Abstract

The utility model discloses a residual water display device for a tank body of a sanitation truck, and relates to the technical field of water level measurement. The device structurally comprises a capacitive liquid level sensor, a power supply, a controller and a display screen, the capacitive liquid level sensor, the controller and the display screen are electrically connected with the power supply respectively; the capacitive liquid level sensor penetrates through the upper end of the tank body, and the lower end of the capacitive liquid level sensor extends to the inner bottom of the tank body; the capacitive liquid level sensor is connected with the controller through a wire. The controller is connected with the display screen through a vehicle-mounted network CAN bus. The capacitive liquid level sensor is installed on the tank body, the controller converts voltage signals output by the liquid level sensor into digital quantity and sends the digital quantity to the vehicle-mounted network CAN bus in a message mode, and the display screen analyzes the digital quantity and converts the digital quantity into an actual physical quantity graph to be displayed on the screen after receiving the message from the CAN bus. The remaining water amount of the tank body can be checked in a cab at any time, a driver can know the water level at any time, and humanization is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of water level measurement, in particular to a device for displaying the remaining water volume in a tank of a sanitation vehicle. Background Art

[0002] It is very important for sprinkler trucks, high-pressure cleaning trucks, washing and sweeping trucks, etc. to provide real-time feedback on the amount of clean water remaining in the tank of the vehicle during watering operations. Taking sprinkler trucks as an example, sprinkler trucks mainly have multiple functions such as road flushing, road sprinkling, emergency fire fighting, water column flushing, gravity irrigation, etc., and are suitable for comprehensive use by urban landscaping, sanitation and other departments, as well as highways, government agencies, schools, factories and mines and other medium and large enterprises and institutions.

[0003] At present, the traditional way to measure the water volume of a water sprinkler is as follows: 1. Install a plexiglass tube water level gauge on the outside of the tank head. The liquid level height observed according to the principle of communicating vessels is the amount of water remaining in the tank. 2. Install a water shortage sensor at the bottom of the tank. When the liquid in the tank is above the sensor, the switch of the sensor's electrical circuit is closed, and the alarm loses power and does not sound an alarm; when the liquid level in the tank is lower than the sensor, the switch of the sensor's electrical circuit is turned on, and the alarm is powered on and sounds an alarm; the alarm indicates that the tank is about to be short of water.

[0004] The traditional measurement method has the following disadvantages: the operator in the cab cannot intuitively and real-time know the remaining water volume in the tank during operation; when the water level sensor is damaged, it is difficult to detect in time, which can easily cause the sprinkler pump to run idle and burn out, affecting the service life and operating efficiency of the sprinkler pump. Utility Model Content

[0005] The utility model aims to provide a device for displaying the remaining water volume in the tank of a sanitation vehicle. By installing a capacitive liquid level sensor on the tank and cooperating with a controller, a vehicle network CAN bus and a display screen, the remaining water volume in the tank can be checked at any time in the cab.

[0006] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0007] The utility model discloses a device for displaying the amount of water remaining in a tank of a sanitation vehicle, comprising a capacitive liquid level sensor, a power supply, a controller and a display screen; the capacitive liquid level sensor, the controller and the display screen are electrically connected to the power supply respectively; the capacitive liquid level sensor is installed through the upper end of the tank body, and the lower end of the capacitive liquid level sensor is connected to the inner bottom thereof; the capacitive liquid level sensor is connected to the controller via a wire; and the controller is connected to the display screen via a vehicle network CAN bus.

[0008] As a preferred technical solution of the utility model, a data decoding unit circuit, a data storage unit circuit, a data comparison unit circuit, and a power supply voltage stabilization circuit are arranged inside the controller.

[0009] As a preferred technical solution of the utility model, a digital decoding unit circuit, a display driving unit circuit, and a liquid crystal display are arranged inside the display screen, and the display screen is installed at any position inside the driving cabin of the sanitation vehicle.

[0010] As a preferred technical solution of the utility model, a wave-breaking plate is arranged inside the tank body.

[0011] As a preferred technical solution of the utility model, the capacitive liquid level sensor includes a fixed flange, a collection board, an outer rod and an inner core; the fixed flange is connected and fixed to the upper end of the tank body; the outer rod and the inner core are vertically inserted into the interior of the tank body, and the collection board is connected to the controller through a wire.

[0012] The utility model has the following beneficial effects:

[0013] 1. The utility model installs a capacitive liquid level sensor on the tank body. The controller converts the voltage signal output by the liquid level sensor into a digital quantity and sends it to the vehicle network CAN bus in the form of a message. After receiving the message from the CAN bus, the display screen analyzes the digital quantity and converts it into an actual physical quantity graphic display on the screen. When the sprinkler truck is in normal watering operation, the remaining water in the tank can be checked in the cab at any time, without having to get off the vehicle to check the liquid level and other working conditions. The driver's perception effect is greatly improved, and it is more humane.

[0014] 2. The utility model installs a capacitive liquid level sensor on the tank body. The capacitive liquid level sensor has the characteristics of simple structure, no movable or elastic components, easy installation, reliable control, simple operation and minimal maintenance.

[0015] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 The utility model is a structural schematic diagram of a device for displaying the amount of water remaining in a tank of a sanitation vehicle.

[0018] Figure 2 It is a structural schematic diagram of a capacitive liquid level sensor.

[0019] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0020] 1-tank body, 2-capacitive liquid level sensor, 3-power supply, 4-controller, 5-display screen, 21-fixing flange, 22-collection board, 23-outer rod, 24-inner core. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Specific embodiment one:

[0023] See also Figure 1-2 As shown, the utility model is a device for displaying the remaining water volume in a tank of a sanitation vehicle, comprising a capacitive liquid level sensor 2, a power supply 3, a controller 4 and a display screen 5. The capacitive liquid level sensor 2, the controller 4 and the display screen 5 are electrically connected to the power supply 3, respectively. The capacitive liquid level sensor 2 is installed through the upper end of the tank body 1, and the lower end of the capacitive liquid level sensor 2 is connected to the inner bottom thereof. A data decoding unit circuit, a data storage unit circuit, a data comparison unit circuit, and a power supply voltage stabilization circuit are arranged inside the controller 4. The capacitive liquid level sensor 2 is connected to the controller 4 via a wire. The controller 4 is connected to the display screen 5 via the vehicle network CAN bus. Among them, a digital decoding unit circuit, a display driving unit circuit, and a liquid crystal display are arranged inside the display screen 5, and the display screen 5 is installed at any position inside the cab of the sanitation vehicle.

[0024] Among them, the capacitive liquid level sensor 2 includes a fixed flange 21, a collection board 22, an outer rod 23 and an inner core 24. The fixed flange 21 is connected and fixed to the upper end of the tank body 1. The outer rod 23 and the inner core 24 are vertically inserted into the tank body 1, and the collection board 22 is connected to the controller 4 through a wire. The capacitive liquid level sensor 2 is based on the principle of capacitive induction. When the height of the water-immersed measuring electrode in the tank body 1 changes, its capacitance will change. It can convert the change in water height into a 0-5V voltage signal. The characteristics of the capacitive liquid level sensor are simple in structure and without any movable or elastic components, so it has extremely high reliability and very little maintenance. Under normal circumstances, there is no need for conventional large, medium or small repairs. The capacitive liquid level sensor 2, power supply 3, controller 4 and display screen 5 are easy to install, reliable in control and simple to operate.

[0025] When the sprinkler truck is operating, the capacitive liquid level sensor 2 will first detect the height of the remaining water in the tank 1, and convert it into a 0-5V voltage signal and output it to the on-board controller 4. The on-board controller 4 will convert the 0-5V voltage signal input from the capacitive liquid level sensor 2 into a digital quantity of the controller 4 control program and send it to the on-board network CAN bus in the form of a message. After receiving the message from the CAN bus, the display screen 5 will parse the digital quantity and convert it into an actual physical quantity graphic display on the screen. When the sprinkler truck is operating normally, the remaining water in the tank can be checked at any time in the cab, without having to be limited to getting off the car to check the liquid level and other working conditions. The driver's perception effect is greatly improved, and it is more humane.

[0026] Since the tanks 1 of vehicles such as sprinkler trucks, high-pressure cleaning trucks, and washing and sweeping trucks have different shapes and sizes, a controller 4 is used to receive in real time the voltage signal generated by the capacitive liquid level sensor 2 to detect the water in the tank 1 in real time. The voltage signal is converted into a digital quantity of the controller 4 control program and sent to the vehicle network CAN bus in the form of a message. After receiving the message from the CAN bus, the display screen 5 parses the digital quantity and converts it into an actual physical quantity graph, that is, the function and principle of detecting the depth of water remain unchanged.

[0027] Among them, a wave-breaking plate is arranged inside the tank body 1. One or more wave-breaking plates can be arranged inside the tank body 1 as needed to prevent the water inside the tank body 1 from swinging.

[0028] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0029] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A device for displaying the remaining water volume in a tank of a sanitation vehicle, characterized in that: It comprises a capacitive liquid level sensor (2), a power supply (3), a controller (4) and a display screen (5); the capacitive liquid level sensor (2), the controller (4) and the display screen (5) are electrically connected to the power supply (3) respectively; The capacitive liquid level sensor (2) is installed through the upper end of the tank body (1), and the lower end of the capacitive liquid level sensor (2) reaches the inner bottom thereof; The capacitive liquid level sensor (2) is connected to the controller (4) via a wire; the controller (4) is connected to the display screen (5) via a vehicle network CAN bus; The controller (4) is internally provided with a data decoding unit circuit, a data storage unit circuit, a data comparison unit circuit, and a power supply voltage stabilization circuit; A wave-breaking plate is arranged inside the tank body (1).

2. The device for displaying the remaining water volume in the tank of a sanitation vehicle according to claim 1, characterized in that: The display screen (5) is provided with a digital decoding unit circuit, a display driving unit circuit, and a liquid crystal display, and the display screen (5) is installed at any position inside the driving cabin of the sanitation vehicle.

3. The device for displaying the remaining water volume in the tank of a sanitation vehicle according to claim 1, characterized in that: The capacitive liquid level sensor (2) comprises a fixing flange (21), a collection board (22), an outer rod (23) and an inner core (24); the fixing flange (21) is connected and fixed to the upper end of the tank body (1); the outer rod (23) and the inner core (24) are vertically inserted into the tank body (1); and the collection board (22) is connected to the controller (4) via a wire.

Images