KR20060092672A - Apparatus for measuring electrostatic for a vehicle - Google Patents

Abstract

The present invention relates to a real-time static electricity measuring device for a vehicle, the chamber 110, the cooler 120 for cooling the chamber 110, the fuel tank 131, the pump 132 and the fuel installed in the chamber 110 A fuel circulation supply unit 130 which circulates and supplies the fuel stored in the fuel tank 131 by the filter 133 to the fuel tank 131 by passing the fuel filter 133 by the pumping of the pump 132; It is installed in the chamber 110 to measure the static electricity generated by the fuel circulation supply means 130 and outputs as an electrical signal, and receives the electrical signal output from the electrostatic sensor 140 as data A data processing unit 150 for processing and a data output unit 160 for outputting data processed by the data processing unit 150 to the outside. Therefore, the present invention is configured in the fuel supply system applied to the vehicle under the conditions that frequently generate static electricity to easily measure the generation and accumulation intensity, discharge threshold level and discharge frequency of static electricity for such a fuel supply system in real time This suggests specific indicators of the safety of static electricity in the vehicle fuel supply system, and makes it possible to determine the level of danger due to electrostatic discharge from hazardous areas in the fuel supply system when designing or operating parts of the fuel supply system. It has the effect of contributing to the development of vehicles with excellent driving safety and the development of advanced vehicles that satisfy the safety requirements of advanced countries.

Description

Automotive real-time static measuring device {APPARATUS FOR MEASURING ELECTROSTATIC FOR A VEHICLE}

1 is a view showing a vehicle real-time static electricity measuring device according to the present invention,

2 is a block diagram showing a real-time static electricity measuring device for a vehicle according to the present invention,

Figure 3 is a side view showing a removable bracket of the vehicle real-time static electricity measuring device according to the present invention,

4 to 6 is a graph showing the amount of static electricity measured by the vehicle real-time static electricity measuring apparatus according to the present invention.

<Description of Symbols for Main Parts of Drawings>

110: chamber 113: supply port

114 outlet 120 cooler

130: fuel circulation supply means 131: fuel tank

132: fuel pump 133: fuel filter

134: circulation supply line 135: fuel supply hose

136: removable bracket 136a: fixed post

136b: magnetic housing 136c: flange

136d: Knob 137: Clamp

138: flow meter 140: electrostatic sensor

150: data processing unit 160: data output unit

170: camera 180: lighting

190: dry air supply

The present invention relates to a real-time static electricity measuring device for a vehicle, and more particularly, the real-time static electricity measuring device for a vehicle according to the present invention comprises a fuel supply system applied to a vehicle under such a condition that the static electricity frequently occurs in such a fuel supply system. The present invention relates to a real-time static electricity measuring device for a vehicle that can easily measure in real time the generation and accumulation intensity of the static electricity, the discharge threshold level and the discharge frequency.

In general, as high pressure direct injection engines such as gasoline direct injection (GDI) engines and common rail direct injection (common rail direct) engines are becoming common, it is inevitable to supply fuel at high pressure and high speed. Air gap densities for improvement have increased the contact area with fuel, and the relative speed of contact has increased so much that there is a greater concern of static buildup and air discharge in the fuel supply system.

Static electricity generated in a vehicle, in particular in a fuel supply system, can interfere with the normal operation of the vehicle's advanced electronic components and even lead to dangerous situations such as inducing explosion of vaporized fuel in fuel tanks.

On the other hand, devices such as anti-static keys, discharge shoes, air discharge induction mechanisms, etc. are used to remove the static electricity present in the vehicle, but are generated in specific components in the vehicle, for example, the fuel filter forming the fuel supply system. The reality is that it does nothing to remove static electricity.

In addition, advanced countries regulate static electricity levels in the fuel supply system of vehicles that accumulate for a certain time in an environment where static electricity is easily generated, in particular, the level of the static potential measured at the edge of the fuel filter is within a safe level. However, it has a problem that it is difficult to measure the static electricity in the fuel supply system in the vehicle actually running and output it as data for analysis.

Therefore, by constructing a fuel supply system used in a vehicle and measuring and data of the amount of static electricity generated in such a fuel supply system under an environment where static electricity may be generated, the component designer or the driver of the fuel supply system may risk It can contribute to the vehicle's driving safety by making it possible to determine the level of danger due to electrostatic discharge at the site, and to the development of advanced vehicles equipped with self-diagnostic devices (OBD) already mandated by environmentally advanced countries such as the US and Europe. Development of the device has become necessary.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to construct a fuel supply system applied to a vehicle under conditions in which static electricity frequently occurs, thereby generating and accumulating the static electricity of the fuel supply system. And to provide a real-time electrostatic measuring device for vehicles that can easily measure the discharge threshold level and the discharge frequency in real time.

The present invention for realizing the above object is to pass the fuel filter stored in the fuel tank by the pump, pumping the chamber by the chamber, a cooler for cooling the chamber, and a fuel tank, a pump and a fuel filter installed in the chamber, Fuel circulation supply means for circulating and supplying to the fuel tank again, an electrostatic sensor installed in the chamber to measure the static electricity generated by the fuel circulation supply means and outputting it as an electrical signal, and receiving the electrical signal output from the electrostatic sensor. And a data output unit for outputting the data processed by the data processing unit to the outside.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention.

1 is a view showing a real-time static electricity measuring device for a vehicle according to the present invention, Figure 2 is a block diagram showing a real-time static electricity measuring device for a vehicle according to the present invention. As shown, the vehicle real-time static electricity measuring device 100 according to the present invention is largely the chamber 110, the cooler 120 for cooling the chamber 110, and the fuel circulation supply means installed in the chamber 110 ( 130, a static electricity sensor 140 installed in the chamber 110 to measure static electricity, a data processor 150 for processing the amount of static electricity measured by the static electricity sensor 140, and a data processor 150. It includes a data output unit 160 for outputting the data processed by the outside.

The chamber 110 forms an enclosed space inside, a heat insulating material is provided on a wall for heat insulation, a door 111 not shown on the top or one side for opening and closing, and a cooler 120, fuel on the outside. An operation unit 112 for controlling the operation of the circulation supply means 130 and the static electricity sensor 140 is provided. In addition, the chamber 110 has a pad (not shown) made of a material having elasticity on the lower side of the electrostatic sensor 140 such that the electrostatic sensor 140 is not affected by vibration caused by the driving of the cooler 120. The same vibration preventing member may be provided.

The cooler 120 cools the inside of the chamber 110 by heat exchange by circulating and supplying the liquefied refrigerant by circulating the refrigerant by releasing heat through the compressor and the condenser, and an operation unit 112 provided outside the chamber 110. Maintains the temperature inside the chamber 110 at the temperature set by ().

The fuel circulation supply unit 130 pumps the fuel tank 131 in which the fuel is stored therein and the fuel stored in the fuel tank 131 to circulate and supply the fuel stored in the fuel tank 131 back to the fuel tank 131 along the circulation supply line 134. And a fuel filter 133 installed on the circulation supply line 134 to filter the fuel circulated.

The fuel tank 131 is detachably coupled with a stopper 131a on one side so as to be opened and closed when fuel is supplied to the inside, and the inside of the fuel tank 131 may be filled with gasoline or diesel, which is actually used in a vehicle. Aerodynamic fluid is filled with 0.18 to 0.22 cSt (Centi Stokes), particularly similar to gasoline, to aircraft hydraulic fluid with a viscosity of 0.20 cSt. Hydraulic hydraulic fluid for aircraft is a machine oil (synthetic oil), for example, the type is ISO VG 15, and the product name is AEROSHELL FLUID 15.

The fuel filter 133 is mounted on an actual vehicle, and a product requiring measurement of a dangerous level due to static electricity is used.

The portion of the circulation supply line 134 where the fuel filter 133 is installed is directly connected to the fuel filter 133 has a fuel supply hose 135 that is used in an actual vehicle so that static electricity is accumulated in the fuel filter 133. Used.

A flow meter 138 is installed to measure the flow rate of the fuel passing on the circulation supply line 134, and the flow rate value measured by the flow meter 138 is provided on the outer surface of the chamber 110. Is displayed through the outside.

The static electricity sensor 140 is installed in the chamber 110 to measure the static electricity generated by the flow of the fuel circulated by the fuel circulation supply means 130 and outputs an electrical signal.

The chamber 110 is provided with a detachable bracket 136 to detachably fix the static electricity sensor 140 to a desired position by magnetic force. 2 and 3, the removable bracket 136 is formed of a material attached by a magnetic force is a fixed post (136a) standing inside the chamber 110, and the electrostatic sensor 140 and the magnet inside It includes a magnetic housing (136b) is installed (not shown).

The fixed post 136a is made of iron (Fe) or iron-containing material, is formed vertically, and the flange 136c formed at the bottom is fixed to the bottom surface of the chamber 110 by bolts or screws.

The magnet housing 136b releases the magnetic force on the surface attached to the fixed post 136a by changing the direction of the magnetic force by rotating the magnet installed inside by the rotation of the knob 136d provided on the upper side, thereby fixing it. It can be easily attached or detached to the post 136a.

The data processor 150 converts the analog signal output from the static electricity sensor 140 into a digital signal and processes the data into necessary data by a pre-installed program. At this time, the data processor 150 is provided with a memory unit 151 to store the processed data.

The data output unit 160 outputs the data processed by the data processing unit 150 to the outside, and for this purpose, a printer or a display device for outputting an image is used.

The camera 170 and the lighting 180 are installed inside the chamber 110 to capture and record an image of a flame generated by the discharge of static electricity accumulated in the chamber 110 and a sound generated during the discharge.

The camera 170 and the lighting 180 may be installed to stand on the bottom or side of the chamber 110 or may be photographed at a predetermined position in the chamber 110 by the clamp 137, preferably the main surface of the fuel filter 133. Installed and recorded by the camera 170 and the sound is stored in a separate recording medium and displayed on a separate display device or stored in the memory unit 151 data output unit 160 configured as a display device ) Can be displayed.

A dry air supplier 190 is provided to circulate and supply dry air to the inside of the chamber 110 so that a large amount of static electricity is accumulated at room temperature by drying the air inside the chamber 110.

The dry air supplier 190 circulates and supplies the air dried by the heating means through the supply port 113 and the discharge port 114 of the chamber 110 by the blowing force of the blower (not shown).

Operation of the vehicle real-time static electricity measuring device having such a structure is performed as follows.

In order to measure the static electricity and discharge situation generated by the fuel circulation supply means 130 installed in the chamber 110, the inside of the chamber 110 is cooled to a predetermined temperature by the cooler 120, and then the fuel circulation supply means 130 is provided. The fuel pump 132 is driven to circulate and supply the fuel stored in the fuel tank 131. At this time, the electrostatic sensor 140 is installed so as to be adjacent to the corner portion of the fuel filter 133 is a lot of static electricity using a removable bracket 136 using a magnetic force to measure the amount of static electricity, the electrostatic sensor 140 In order to obtain the most accurate measurement value in the characteristic to maintain the distance to the fuel filter 133 about 10cm, the amount of static electricity measured from the electrostatic sensor 140 is received by the data processor 150 as an electrical signal is processed data In addition to being stored in the memory unit 151, the data output unit 160 outputs the document or image to the outside.

In addition, by circulating and supplying dry air by the dry air supplier 190 in the chamber 110, the humidity in the chamber 110 is maintained at 0% to allow a large amount of static electricity to accumulate at room temperature and to minimize the effects of moisture. By controlling the pumping force of the fuel pump 132 by grasping the flow rate of the fuel circulated by the flow meter 138, the desired flow rate can be circulated. The presentation was made possible.

On the other hand, through the image and sound inside the chamber 110, which is photographed and recorded using the camera 170 and the illumination 180, it is possible to observe the spark generation and the sound caused by the discharge at low temperatures, the vibration preventing member (not shown) By the time) it is possible to prevent the error of the electrostatic sensor 140 due to the vibration during the operation of the cooler (120).

4 to 6 show a graph output through the data output unit 160 using the vehicle real-time static electricity measuring device 100 according to the present invention, fuel recycling by the electrostatic potential measurement method (system field strength test method) Compare the constant voltage or electrostatic potential level generated by static electricity accumulation under the given conditions and measure the time when the electric field or electric field is consumed.The electric field strength is the magnitude of the vector amount of positive polarity unit static charge. As a fuel, a product having a viscosity of about 0.20 cSt, similar to gasoline, was used in the Aero Hydraulic Fluid, and the test temperatures were -0 ° C, -15 ° C, and -30 ° C, respectively. The fuel circulation supply means 130, which is a fuel system, constructed the same fuel line as the actual vehicle, and maximized the generation of electrostatic charge by operating the operating conditions at the maximum circulation conditions. The fuel pump 132 was installed outside the fuel tank 131, the power applied to the fuel pump 132 was 13.2 V, and the test time was continuously accumulated in the potential potential data from 12 to 48 hours. Discharge risk criteria were set to areas with high risk of discharge through this test.

FIG. 4 is a view of a time-dependent change in the amount of static electricity generated at −30 ° C. in the chamber 110, as shown in FIG. 4, at about −10 ° C., about 10 KV of static electricity is generated and a discharge occurs momentarily. Is charged again, and the static electricity of the same size is measured over time.

5 and 6 are measurements of the time-dependent change in the amount of static electricity generated at −15 ° C. and −0 ° C. in the chamber 110, respectively. The numerical value is shown.

As described above, the fuel supply system applied to the vehicle, in this embodiment, the fuel circulation supply means 130 is configured under the conditions in which the static electricity frequently occurs, so that the generation and accumulation intensity of the static electricity and the discharge threshold level for the fuel supply system. And the frequency of discharge and the like can be easily measured in real time, thereby providing a concrete indicator of the safety of the static electricity of the vehicle fuel supply system.

In addition, the temperature in the chamber 110 is cooled by the cooler 120 and the air supplied by the dry air supply 190 is circulated to supply extreme temperatures, for example, where static electricity and discharge frequently occur when the vehicle is running. By correctly reproducing winter in North Europe, North America or Korea, the actual vehicle can accurately detect the occurrence of static electricity in extreme temperatures.

In addition, the fuel circulated and supplied by the fuel circulation supply means 130 is used as aviation oil that ensures low-temperature fluidity in the hydraulic oil having the property of easily separating charges according to the SAE, and has the viscosity characteristics of the actual fuel even in aviation oil By using products in the range of 0.18 to 0.22 cSt, not only does it eliminate the risk of fire caused by electrostatic discharge when using gasoline, which is the actual vehicle fuel, but also prevents freezing of the components constituting the fuel circulation supply means 130 according to the low temperature test. It was.

When designing the parts of the fuel supply system or during operation, it is possible to determine the danger level due to the electrostatic discharge from the dangerous parts in the fuel supply system. Contributing to the manufacture of products conforming to international standards related to static electricity when designing or changing parts such as fuel filters, fuel supply lines, fuel pumps, fuel tanks, etc., to satisfy the safety requirements of developed countries with high driving safety and environmentally advanced requirements. Can contribute to the development of advanced vehicles.

In addition, it secures test technology and manufacturing technology of technology superior to international standard test method (SAE J1645), and is used for electric field strength measurement and discharge performance evaluation of fuel supply system which is more technically superior in resistance measurement test level of single product. It can establish a test device and contribute to the prevention of malfunction and damage of various electronic components caused by static electricity.

As described above, the real-time static electricity measuring device for a vehicle according to the present invention constitutes a fuel supply system applied to a vehicle under conditions in which static electricity frequently occurs, thereby generating static electricity and accumulating intensity and discharge threshold level for such a fuel supply system. And the frequency of discharge, etc. are easily measured in real time, thereby providing a concrete indicator of the safety of the static electricity of the vehicle fuel supply system, and electrostatic discharge from dangerous parts in the fuel supply system during the design or operation of components of the fuel supply system. It is possible to determine the level of danger due to the development of a vehicle with excellent driving safety and has the effect of contributing to the development of advanced vehicles that meet the safety requirements of advanced countries.

What has been described above is just one embodiment for implementing a real-time static electricity measuring device for a vehicle according to the present invention, the present invention is not limited to the above embodiment, as claimed in the following claims of the present invention Without departing from the gist of the present invention, one of ordinary skill in the art will have the technical spirit of the present invention to the extent that various modifications can be made.

Claims (6)

Chamber, A cooler for cooling the chamber, A fuel circulation supply means for circulating the fuel stored in the fuel tank by the fuel tank, the pump, and the fuel filter installed in the chamber, passing the fuel filter by the pump and circulating the fuel to the fuel tank; An electrostatic sensor installed in the chamber and configured to measure static electricity generated by the fuel circulation supply means and output the electrical signal as an electrical signal; A data processor which receives an electrical signal output from the electrostatic sensor and processes the data into data; Data output unit for outputting the data processed by the data processing unit to the outside Vehicle real-time static measurement device comprising a. The method of claim 1, The chamber is Detachable bracket is provided to detachably fix the electrostatic sensor to a desired position by a magnetic force Real-time electrostatic measuring device for a vehicle, characterized in that. The method of claim 1, The fuel circulation supply means, Flow rate meter for measuring the flow rate of the fuel passing through the circulation supply line is installed on the circulation supply line circulating supply Vehicle real-time static electricity measuring device further comprising. The method according to claim 1 or 3, The fuel circulated and supplied by the fuel circulation supply means, Viscosity in aircraft hydraulic oil of 0.18 to 0.22 cSt Real-time electrostatic measuring device for a vehicle, characterized in that. The method according to claim 1 or 2, Camera and lighting installed in the chamber for recording and recording the image and sound of the flame generated by the discharge in the chamber Vehicle real-time static measurement device further comprising. The method according to claim 1 or 2, Dry air supply for circulating dry air into the chamber Vehicle real-time static electricity measuring device further comprising.

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