CN112504399A

CN112504399A - Liquid level transmitter for vehicle fuel oil theft prevention

Info

Publication number: CN112504399A
Application number: CN202011309456.8A
Authority: CN
Inventors: 韩丽宁; 高贵琴; 田瑞军; 吕彪; 乔智星; 孙琦
Original assignee: Beiben Trucks Group Co Ltd
Current assignee: Beiben Trucks Group Co Ltd
Priority date: 2020-11-20
Filing date: 2020-11-20
Publication date: 2021-03-16

Abstract

The invention relates to a liquid level transmitter for preventing vehicle fuel from being stolen, which comprises a PCB (printed circuit board) 6, a guide rod 9, a sealing cover 11, a buoy 12 and a bottom plug 13; aluminium lid 5, bayonet 7 is to detaining at 6 upper end knecks of PCB board, and aluminium lid 5 and bayonet 7 fixed connection, PCB board 6 inserts the inside of guide arm 9, a plurality of electron tubes on PCB board 6 arrange along the axis of guide arm 9 in proper order, guide arm joint 8 is fixed on the upper end of guide arm 9, closing cap 11 is fixed at the lower extreme of bayonet 7, closing cap 11 and guide arm joint 8 the other end simultaneously with fuel tank 1 fixed connection, the lower port portion of guide arm 9 is fixed with end plug 13, 12 slip suits of flotation pontoon are in the periphery middle part of guide arm 9, 2 magnetite are fixed respectively on 12 upper end terminal surface of flotation pontoon and lower both ends face. The invention realizes the monitoring of the fuel oil descending speed in the fuel oil tank and the fuel oil theft prevention.

Description

Liquid level transmitter for vehicle fuel oil theft prevention

Technical Field

The invention belongs to the technical field of vehicles, and particularly relates to a liquid level transmitter for preventing vehicle fuel from being stolen.

Background

The fuel tanks matched with the current heavy trucks are basically 400L, 500L, 600L, 700L and even 1000L of large-volume fuel tanks. The large-volume oil tank can increase the driving range of the vehicle and reduce the cost of users on the one hand, and on the other hand, the phenomenon that fuel oil is stolen frequently occurs due to the fact that the large-volume oil tank is filled with more oil tanks. Criminals can steal by destroying the fuel tank, opening an oil leakage opening of the fuel tank, or unscrewing the oil mass sensor interface, and the like. The fuel oil is prevented from being stolen in a few ways, and generally, the fuel oil is prevented from being stolen by adding an anti-theft fuel tank cover or an anti-theft filter screen, and even a user carries a dog along with a vehicle. Although the anti-theft forms can reduce the risk of fuel theft, the anti-theft forms are palliative and not permanent, and have no obvious anti-theft effect.

Disclosure of Invention

The invention aims to provide a vehicle fuel anti-theft liquid level transmitter, which realizes monitoring of the descending speed of fuel in a fuel tank and fuel anti-theft.

The invention has the technical scheme that 1, a vehicle fuel anti-theft liquid level transmitter is characterized in that: the liquid level transmitter comprises an aluminum cover 5, a PCB 6, a bayonet 7, a guide rod joint 8, a guide rod 9, a sealing cover 11, a buoy 12, a bottom plug 13, a liquid level signal power line joint 15 and an alarm leading-out wire joint 16;

liquid level signal power cord connects 15 and alarm lead-out wire connects 16 and all connects through cable and PCB 6 upper end interface connection, aluminium lid 5, bayonet 7 is to detaining at PCB 6 upper end interface department, and aluminium lid 5 and bayonet 7 fixed connection, guide arm 9 is the hollow tube, PCB 6 inserts the inside of guide arm 9, a plurality of electron tubes on PCB 6 arrange in proper order along the axis of guide arm 9, guide arm connects 8 to be fixed on the upper end of guide arm 9, closing cap 11 is fixed at the lower extreme of bayonet 7, closing cap 11 and the other end of guide arm joint 8 pass through screw 10 and fuel tank 1 fixed connection simultaneously, the lower port portion of guide arm 9 is fixed with end plug 13, flotation pontoon 12 slip suit is in the middle part of the periphery of

guide arm

9, 2 magnetite are fixed respectively on the upper end terminal surface and the lower both ends face of flotation pontoon 12.

The plurality of tube resistors on the PCB board 6 are connected in series.

The fuel oil anti-theft alarm has the advantages that the fuel oil descending speed in the fuel oil tank is monitored, when the fuel oil descending speed in the fuel oil tank exceeds the normal speed, namely the buoy on the liquid level transmitter moves fast, the alarm gives an alarm, immediately gives a buzzing alarm and gives an alarm prompt on a mobile phone of a user, the fuel oil anti-theft is carried out, and the economic loss of the user is reduced; the liquid level transmitter is inserted in a fuel tank plug-in port and is different from a vehicle fuel sensor plug-in port, connected cables are two sets of independent pipelines and do not influence each other, when a vehicle is flameout, the fuel sensor does not have the function of displaying the fuel quantity, the liquid level transmitter is connected with a power supply to start working, and when the falling speed of a buoy on the liquid level transmitter reaches or exceeds a set value, an alarm gives out a buzzing alarm and sends an alarm prompt to a user, so that the stealing risk cost can be increased, the vehicle fuel stealing risk of the user is reduced, and the economic loss of the user is reduced.

Drawings

FIG. 1 is a schematic diagram of a practical structure of a liquid level transmitter for vehicle fuel theft prevention according to the present invention;

FIG. 2 is a schematic view of a fuel tank embodying the present invention;

FIG. 3 is a top view of FIG. 2;

FIG. 4 is an exploded view of a liquid level transmitter for preventing fuel theft of a vehicle according to the present invention;

fig. 5 is a schematic view showing a plurality of valve connections according to the present invention.

Detailed Description

The technical scheme of the invention is further described in detail in the following with the accompanying drawings of the specification.

As shown in fig. 2 and 3, two connectors are provided on the upper end surface of the fuel tank 1, one connector is inserted with the fuel sensor 3, the fuel sensor 3 is connected with the dashboard of the vehicle through a cable, and the fuel sensor 3 generates different resistance values through different positions of the upper float in the fuel sensor, so that the fuel amount inside the fuel tank 1 is displayed on the dashboard (displayed during driving). The other interface is connected with a liquid level transmitter 2 in a plugging way, and the liquid level transmitter is positioned in the fuel tank 1. The level transmitter 2 has the function of monitoring the fuel level when the vehicle is stopped.

As shown in figures 1 and 4, the liquid level transmitter for preventing the fuel from being stolen of the vehicle comprises an aluminum cover 5, a PCB 6, a bayonet 7, a guide rod joint 8, a guide rod 9, a screw 10, a sealing cover 11, a float 12, a bottom plug 13, a gasket 14, a liquid level signal power line joint 15 and an alarm leading-out wire joint 16.

The liquid level signal power line connector 15 and the alarm leading-out wire connector 16 are connected with the upper end interface of the PCB 6 through cables. The aluminum cover 5 and the bayonet 7 are buckled on an upper end interface of the PCB 6 in a butt joint mode, the upper end interface of the PCB 6 is sealed, and the butt joint position of the aluminum cover 5 and the bayonet 7 is provided with an interface which is connected with each other for fixing. The guide rod 9 is a hollow tube. The PCB 6 is inserted into the guide bar 9, and a plurality of electronic tubes on the PCB 6 are sequentially arranged along the axis of the guide bar 9. One end of a guide rod joint 8 is fixed on the upper end of a guide rod 9 through threads, a sealing cover 11 is fixed at the lower end of a bayonet 7, the sealing cover 11 is made of stainless steel with the thickness of 3mm, 5 holes with the diameter of phi 7 are formed in the sealing cover 11, the other end of the sealing cover 11 and the other end of the guide rod joint 8 are fixedly connected with the fuel tank 1 through screws 10, a gasket 14 is arranged between the lower surface of the sealing cover 11 and the outer surface of the fuel tank 1, and the screws 10 are used for pressing the liquid level transmitter to prevent fuel from flowing out from a connector of the. A bottom plug 13 is fixed at the lower port of the guide rod 9. The buoy 12 is slidably sleeved in the middle of the periphery of the guide rod 9, the buoy 12 slides up and down along the guide rod 9 along with the change of the liquid level in the fuel tank, and 2 magnets are respectively fixed on the upper end face and the lower end face of the buoy 12;

the alarm lead wire connector 16 is connected with an alarm 18 of a vehicle, and the power wire connector 15 is connected with a vehicle power supply.

The working principle of the liquid level transmitter is that after a vehicle is flamed out, the buoy 12 moves up and down, the magnet on the buoy 12 and the magnet reed switch of the PCB 6 arranged in the guide rod 9 are acted to realize the suction or disconnection of the magnet reed switch, the PCB 6 is provided with a plurality of electronic tubes along the axial line, the magnet reed switch on the electronic tubes is connected with resistors in series, the resistors on the electronic tubes are connected in series to form a circuit with variable resistance, and the change of the resistance is transmitted to an ECU (an automatic control unit of a vehicle engine) through a lead for analysis. When the vehicle runs, the reed switches of all the electronic tubes are normally opened, and when the vehicle stops, all the reed switches are in an engaged state. The normally open reed switch is switched on when in a magnetic field and is in a switched-off state when out of the magnetic field, and the normally closed reed switch is switched off when in the magnetic field and is in a switched-on state when out of the magnetic field. When the float 12 approaches to a certain electronic tube from top to bottom, the magnet of the float 12 acts on the electronic tube of the PCB 6 in the guide rod to send a switch on-off signal. When the change speed of the resistance value reaches or exceeds a set value (the change speed of the resistance value changes along with the volume of the oil tank or the section of the oil tank), the alarm of the vehicle automatically sends out a buzzing alarm, and is automatically connected with a mobile phone of a user to send out a short message prompt. When the floater slips from the first connection state to the second connection state, the alarm automatically gives out a buzzing alarm.

The working principle of the invention is to monitor the descending speed of fuel in the fuel tank. The fuel level transmitter is placed in the fuel tank, when a vehicle is flamed out and is powered off, the fuel level transmitter in the fuel tank is automatically switched on, the fuel level transmitter starts to monitor the fuel level in the fuel tank, and when the speed of fuel 17 in the fuel tank is reduced to exceed the normal speed, the alarm immediately sends out a buzzing alarm and sends out an alarm prompt on a mobile phone of a user. By the mode, the fuel 17 can be monitored in real time, and the fuel 17 can be prevented from being stolen.

Claims

1. The utility model provides a liquid level changer is used in theftproof of vehicle fuel, characterized by: the liquid level transmitter comprises an aluminum cover 5, a PCB 6, a bayonet 7, a guide rod joint 8, a guide rod 9, a sealing cover 11, a buoy 12, a bottom plug 13, a liquid level signal power line joint 15 and an alarm leading-out wire joint 16;

liquid level signal power cord connects 15 and alarm lead-out wire connects 16 and all connects through cable and PCB 6 upper end interface connection, aluminium lid 5, bayonet 7 is to detaining at PCB 6 upper end interface department, and aluminium lid 5 and bayonet 7 fixed connection, guide arm 9 is the hollow tube, PCB 6 inserts the inside of guide arm 9, a plurality of electron tubes on PCB 6 arrange in proper order along the axis of guide arm 9, guide arm connects 8 to be fixed on the upper end of guide arm 9, closing cap 11 is fixed at the lower extreme of bayonet 7, closing cap 11 and the other end of guide arm joint 8 pass through screw 10 and fuel tank 1 fixed connection simultaneously, the lower port portion of guide arm 9 is fixed with end plug 13, flotation pontoon 12 slip suit is in the middle part of the periphery of guide arm 9, 2 magnetite are fixed respectively on the upper end terminal surface and the lower both ends face of flotation pontoon 12.

2. The liquid level transmitter for vehicle fuel theft prevention according to claim 1, characterized in that: the plurality of tube resistors on the PCB board 6 are connected in series.