JP2009128337A - Method and device for waterproof test of in-car electronic toll collection (etc) system for two-wheel vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a new method and device for waterproof test of in-car ETC system for two-wheel vehicles so as to solve the problem wherein the conventional waterproof test, in which a tester and reference instrument have been included into each of two highly-airtight chambers, are pressurized and compared with the reference instrument, takes a time to depressurize inside the chamber and return it to its steady state, and can not provide an efficient testing. <P>SOLUTION: In this method, a hole for vacuum pumping is made on a case of the testing apparatus, air suction cable from the vacuum pump is connected with this hole, allowing depressurization. Then temporal change of the depressurization is measured to conduct testing, and then testing is efficiently achieved without requiring in-chamber depressurization, etc. after completion of testing. An electric testing is also conducted simultaneously with the waterproof test. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

The present invention relates to a waterproof test method for ETC onboard equipment for motorcycles and a test apparatus therefor.

The configuration of a conventional waterproof test apparatus is shown in FIG. The waterproof test apparatus comprises two highly airtight chambers A41 and B42, and a reference device 48 that has been confirmed to be waterproof and a device under test 49 that performs a waterproof test are contained in the respective chambers. Both are simultaneously pressurized by the air pump A43 and the air pump B44, and the time-dependent change in the pressurized state is detected and compared by the sensor A50 and the sensor B51 to determine the presence or absence of the waterproof state.

In this method, the reference unit 48 is required for each test, and a certain time is required to open the chamber after pressurization, reduce the internal temperature rise and reduce the pressure to return the interior to a steady state. Moreover, since the ETC onboard equipment for two-wheeled vehicles used as the object of this waterproof test needs to confirm waterproofness including a cable, it is also necessary to store a cable in a chamber. If these cables are put in the chamber, the measurement error increases. In addition, the ETC on-board device for a motorcycle that is the subject this time has two casings that need to be waterproofed. However, when the test is NG, it cannot be specified which casing is NG.

Japanese Patent Laid-Open No. 11-14360

In the conventional example shown in FIG. 4, the reference device 48 is required for each test, and a certain time is required to return the interior to a steady state by reducing the pressure after the pressurization. In addition, since the ETC on-board unit for two-wheeled vehicles, which is the subject of this waterproof test, is attached with a cable, a measurement error increases when testing the waterproof property.
In addition, since ancillary cables are placed in the chamber, it is difficult to simultaneously perform an electrical test using these cables.

This invention is made | formed in view of the above-mentioned point, Comprising: It is performing a waterproof test in a short time, without using a reference | standard device and a pressurization chamber. Another object of the present invention is to easily identify a defective housing when the waterproof test is NG even in a structure having a plurality of waterproof test target housings as in the waterproof test of the ETC on-board device for two-wheeled vehicles this time. The other purpose is to conduct an electrical test at the same time as the waterproof test.

The present invention is configured as follows in order to achieve the above-described object.

That is, a two-wheeled vehicle ETC on-board unit comprising a casing having a printed circuit board or the like and a casing having a card insertion portion has a computer and a sequencer controlled by the computer, and is controlled by the sequencer. Each housing has a pump and a sensor, and there are waterproof test holes for decompressing by suction with a vacuum pump, and an air suction cable from the vacuum pump is connected to these waterproof test holes through the sensor. Then, the pressure is reduced and the change in the pressure with time is measured by the sensor to determine the waterproofness. In addition, the electrical characteristics of the ETC onboard equipment for motorcycles are also measured simultaneously.

According to the present invention, the waterproof test can be performed in a short time, and when a plurality of waterproof structures are required, it is possible to easily determine which case is NG. In addition, an electrical test can be performed at the same time.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

The present invention is a test apparatus for performing a waterproof test on an ETC vehicle-mounted device for a motorcycle. Figure 1 shows the configuration of the proposed waterproof test equipment for ETC on-board equipment for motorcycles.

As shown in FIG. 1, the waterproof test apparatus 1 for an ETC on-board device for a two-wheeled vehicle includes a test machine unit 17, a device under test mounting part 11, and a computer 13 for controlling them.

The test machine unit 17 includes a vacuum pump A14, a vacuum pump unit B15, a pressure gauge 16, a sensor A52, a sensor B53, and a sequencer 54 for controlling.
The vacuum pump A14, the vacuum pump unit B15, the sensor A52, and the sensor B53 are controlled by the sequencer 54. The sequencer 54 is controlled by the computer 13.

An ETC vehicle-mounted device 12 which is a device under test is attached to the device under test mounting portion 11. The ETC vehicle-mounted device 12 is controlled by a computer 13 so that an electrical test can be performed.

A two-wheeled vehicle ETC in-vehicle device that is a device under test will be described with reference to FIG. The ETC in-vehicle device includes a casing part A19 having a printed circuit board and the like, and a casing part B18 having a card insertion part.

The housing portion A19 is provided with a hole 22 for performing a waterproof test of the housing portion A. The casing portion B18 is provided with a hole 21 for performing a waterproof test of the casing portion B.

An antenna cable 25, a display cable 24, and a power cable 23 are provided on the ETC vehicle-mounted device. These cables can be connected to test equipment so that electrical tests can be performed.

A description will be given of the EUT mounting portion 11 with reference to FIG. The air suction cable 32 from the vacuum pump A14 is connected to the waterproof test hole 22 for the housing part A via the sensor A52.

Further, the air suction cable 31 from the vacuum pump B15 is connected to the waterproof test hole 21 for the housing part B through the sensor B53.

As shown in FIG. 1, the vacuum pump A14 sucks and depressurizes air from the housing part A19 via the sensor A, and the sensor A measures the pressure in the housing part A19 after being left for a certain period of time in a reduced pressure state. Determine sex. In addition, the vacuum pump B15 sucks and depressurizes air from the casing B18 via the sensor B53, and measures the pressure in the casing B18 after being left for a certain period of time in the reduced pressure state by the sensor B53 to determine waterproofness. .

Next, a waterproof test method using the test apparatus having the above configuration will be described with reference to the flowchart of FIG.

The ETC vehicle-mounted device 12 is attached to the device under test mounting part 11 (step S1). Next, although not shown in the figure, power is supplied to the power cable 23 of the ETC vehicle-mounted device 12 (step S2). When the inspection history check and serial number of the ETC on-board unit 12 which is the device under test are displayed on the screen of the control computer 13, the waterproof test is awaited, and the operator selects the test start (step S4).

In the waterproof test apparatus 1, first, the casing part A air suction cable 32 is automatically connected to the waterproof test hole 22 of the casing part A19 of the ETC vehicle-mounted device 12 to decompress the casing part A (step S5). ). It is left as it is for a certain period of time, and the change with time of the internal pressure of the casing part A is measured (step S7).

Subsequently, the housing part air suction cable 31 is automatically connected to the waterproof test hole 21 of the housing part B18 of the ETC vehicle-mounted device 12 to decompress the housing part B (step S9). It is left as it is for a certain time, and the change with time of the internal pressure of the casing B is measured (step S11).

When the above process is completed, the waterproof test result is displayed on the computer screen. The determination is made in each of the four steps of pressure reduction (step S6), change with time (step S8), pressure reduction (step S10) and change with time (step S12) of the case B18. If the specified pressure-reducing state cannot be maintained in any step, the gas leaks from the outside into the ETC on-board unit, so after identifying the leaking point and taking countermeasures (step S14), return to step S1. Repeat the waterproof test from the beginning.

Steps S5 to S13 are controlled by a sequencer, and a waterproof test is automatically performed.
If a program is set up so that the electrical test is also performed in step S4, the electrical test can be performed simultaneously.

Since the present invention does not require a reference device for each test unlike the conventional tester, a waterproof test can be performed with a single tester and test time is shortened. Since the air suction cable is connected to the two waterproof test holes of the housing part A and the housing part B to perform the decompression test, in the case of the chamber type waterproof test, the leakage part is the housing part A or the housing part B. It was difficult to specify, but this method is easy.

In the case of the chamber method, it was necessary to put the attached cable in the chamber and it was difficult to carry out the electrical test at the same time. However, in this method, the attached cable came out of the waterproof testing device. Therefore, the electrical test can be performed at the same time and the test time can be reduced.

The block diagram of ETC on-board equipment waterproof test equipment for two-wheeled vehicles is shown. It is a figure of the ETC on-board equipment for two-wheeled vehicles which is a device under test It is a figure of an EUT attachment part It is explanatory drawing which shows the structure of the conventional waterproof test apparatus. The flowchart for performing the waterproof test concerning this invention is shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ETC onboard equipment waterproof test apparatus 11 for two-wheeled vehicles 11 Test equipment mounting part 12 ETC onboard equipment 13 Computer 14 Vacuum pump A
15 Vacuum pump B
16 Pressure gauge 17 Test machine part 18 Case part B
19 Case A
21 Waterproof test hole 22 for housing part B Waterproof test hole 23 for housing part A Power cable 24 Display cable 25 Antenna cable 31 Air suction cable for housing part B
32 Air suction cable for case A 41 Chamber A
42 Chamber B
43 Air Pump A
44 Air Pump B
45 Pressure gauge 46 Pressurizing cable 47 Pressurizing cable 48 Reference device 49 Machine under test 50 Sensor A
51 Sensor B
52 Sensor A
53 Sensor B
54 Sequencer

Claims (2)

A two-wheeled vehicle ETC in-vehicle device comprising a casing having a printed circuit board or the like and a casing having a card insertion portion, and having a computer and a sequencer controlled by the computer, and a vacuum pump controlled by the sequencer, Each housing part has a sensor with a hole for waterproof test to reduce the pressure by sucking with the vacuum pump, and connect the air suction cable from the vacuum pump to the hole for waterproof test through the sensor, Waterproof test method and test apparatus for ETC on-board equipment for two-wheeled vehicles, wherein pressure is reduced and the change in pressure with time is measured by the sensor to determine waterproofness The ETC on-board equipment waterproof test method and test apparatus for motorcycles according to claim 1, wherein the electrical characteristics of the ETC on-board equipment for motorcycles are also measured simultaneously.