JP2002022483A - Navigation system test evaluating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily analyze the causes of anomalies in a specimen in a navigation system. SOLUTION: A navigation system specimen 5 is mounted to the vibrating base 4a of a vibration testing machine 4, and a predetermined load is exerted on the specimen 5 by a temperature humidity cycle testing machine 3 and the vibration testing machine 4 under the control of a central control computer 1. The specimen 5 in this state and a non-specimen 6 are activated, and the images of the displays of the specimen 5 and the non-specimen 6 are picked up by CCD cameras 21 and 22. Both picked-up images are compared with each other to determine anomalies, and the image of the display screen of the specimen 5 at the time when the anomalies occur and test load conditions (temperature, humidity, wind velocity, vibration, etc.), at the time are stored in a storage device 23 when the anomalies occur.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a navigation system test evaluation apparatus for performing a navigation system test evaluation.

[0002]

2. Description of the Related Art A navigation system includes a navigation ECU, a display, and the like, and provides a driver with various information for performing travel guidance. Since this navigation system is a product mounted on a vehicle, its use environment is severe, and it is necessary to sufficiently confirm that a prototype can withstand the use environment before being put on the market.

In order to evaluate the reliability of a navigation system, a test article is mounted on equipment under a certain load condition (a constant temperature bath, a vibration tester, etc.), and the power is turned on. A visual check is made to see if there is.

[0004]

In the above-described conventional test evaluation apparatus, even if it is found that an abnormality has occurred, it is necessary to disassemble and investigate the test product in order to analyze the cause of the abnormality. The cause analysis could not be easily performed.

The present invention has been made in view of the above problems, and has as its object to facilitate analysis of the cause of abnormality of a test article in a navigation system.

[0006]

To achieve the above object, according to the first aspect of the present invention, a tester (3, 4) for applying a load to a test article (5) of a navigation system;
Photographing means (21, 22) for photographing the respective display screens of the non-test article (6) and the test article (5) of the navigation system to which the load is not applied, and photographing by the photographing means (21, 22). An abnormality determining means (106) for comparing an image of the display screen of the test article (5) with an image of a display screen of the non-test article (6) to determine an abnormality of the test article (5); A storage means (23) for storing an image of the display screen of the test article (5) when an abnormality is determined and a load condition of the testing machine (3, 4) at that time. .

[0007] By performing a test evaluation using such a test evaluation device, an image of the display screen of the test product (5) and a load condition of the test machine (3, 4) at the time of occurrence of an abnormality are stored in the storage device (23). And the cause of the abnormality can be easily analyzed based on the stored data.

[0008] The reference numerals in parentheses of the above means indicate the correspondence with specific means described in the embodiments described later.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an overall configuration of a test evaluation apparatus for a navigation system according to an embodiment of the present invention.

This test evaluation device includes a centralized control computer 1, a navigation system test bench 2, a temperature / humidity cycle tester 3, and a vibration tester 4.

The central control computer 1 controls the temperature / humidity cycle test machine 3 and the vibration test machine 4 so as to set desired load conditions. A signal (indicated by a solid line in the figure) from the central control computer 1 to the temperature / humidity cycle tester 3 and the vibration tester 4 is a signal for performing operation control, and is centralized from the temperature / humidity cycle tester 3 and the vibration tester 4. A signal (indicated by a broken line in the figure) reaching the management computer 1 is state data indicating the operation state of the temperature / humidity cycle tester 3 and the vibration tester 4.

The temperature / humidity cycle tester 3 sets the internal temperature, humidity and wind speed according to time in accordance with a signal sent from the central control computer 1. Vibration testing machine 4
Sets the type of vibration waveform, the magnitude of vibration, and the direction of vibration according to time in accordance with a signal sent from the central management computer 1.

Temperature / humidity cycle tester 3 and vibration tester 4
Are integrally configured, and the shaking table 4a of the vibration testing machine 4
Then, the test article 5 of the navigation system is attached. When performing test evaluation, a non-test product 6 of a navigation system is installed outside the temperature / humidity cycle tester 3 and the vibration tester 4. Test product 5 and non-test product 6
Have the same configuration, and include a navigation ECU, a display, and the like.

Navigation system test bench 2
Supplies an electric signal (power signal) for operating the test article 5 and the non-test article 6, and a CCD camera 22 for photographing the display screen (display screen) of the test article 5 and the non-test article 6. A CCD camera 21 for photographing the display screen. The navigation system test bench 2 operates the test sample 5 and the non-test sample 6 when performing test evaluation, and the CCD camera 21
The display screen of the non-test specimen 6 is photographed, and the photographed images are compared to determine an abnormality.
And the test load conditions (temperature, humidity, wind speed, vibration, etc.) at that time are stored in the storage device 23.

Next, the operation for performing a test evaluation will be described. FIG. 2 shows the processing performed by the navigation system test bench 2.

First, an inspection time, a judgment item, and a threshold level set by an operator are taken in (step 1).
01, 102, 103). The judgment items are image brightness,
The threshold level is a level for judging that those judgment items are abnormal.

The test article 5 is mounted on the shaking table 4a of the vibration testing machine 4, and given a predetermined load by the temperature and humidity cycle testing machine 3 and the vibration testing machine 4 under the control of the central control computer 1.

Then, a power signal is supplied to the test article 5 and the non-test article 6, and the test article 5 and the non-test article 6 are operated (step 104). When the test sample 5 and the non-test sample 6 are operated, a map is set to be displayed on each display.

Next, the CCD camera 21 and the CCD camera 2
The images of the display screens of the test article 5 and the non-test article 6 are fetched by the signal from Step 2 (Step 105), and the images of the display screens of the test article 5 and the non-test article 6 are compared. (Step 10)
6). For example, abnormality is determined based on whether or not there is a difference equal to or more than a set threshold level between the images of the test sample 5 and the non-test sample 6 regarding the determination items such as the brightness, hue, and disturbance of the image. .

If there is an abnormality, 10
The image of the test sample 5 and the test load conditions (temperature, humidity, wind speed, vibration, etc.) for a minute are stored in the storage device 23. In this case, the image of the display screen of the test sample 5 is stored in the temporary storage means such as a buffer for a certain period of time, so that the image of the display screen of the test sample 5 from 10 minutes after the occurrence of the abnormality is stored in the storage device 23. Can be done. The test load condition can be obtained from the state data from the temperature / humidity cycle tester 3 and the vibration tester 4.

Thereafter, the processing of steps 105 to 108 is repeated until the inspection time has elapsed. After the elapse of the inspection time, inspection end processing such as stopping the power supply signal to the test article 5 and the non-test article 6 is performed (step 109).

By performing such a test evaluation, the image of the display screen of the test article 5 and the test load conditions at the time of occurrence of an abnormality can be stored in the storage device 23, and the stored data facilitates analysis of the cause of the abnormality. Can be done.

[Brief description of the drawings]

FIG. 1 is a diagram showing an entire configuration of a test evaluation device of a navigation system according to an embodiment of the present invention.

FIG. 2 is a flowchart showing processing of a navigation system test bench 2 in FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Central control computer, 2 ... Navigation system test bench, 3 ... Temperature / humidity cycle tester, 4 ... Vibration tester, 5 ... Test product, 6 ... Non-test product, 21, 22 ... C
CD camera, 23 storage device.

Claims (1)

[Claims] 1. A test product of a navigation system (5)
(3), (4), a photographing means (21, 22) for photographing the display screen of each of the non-test product (6) and the test product (5) of the navigation system to which the load is not applied. ) And comparing the image of the display screen of the test article (5) photographed by the photographing means (21, 22) with the image of the display screen of the non-test article (6), Abnormality determining means (106) for determining an abnormality; and storage for storing an image of a display screen of the test article (5) and a load condition of the testing machine (3, 4) at that time when the abnormality is determined. A test evaluation device for a navigation system, comprising: means (23).