Stereo device testing method and stereo device testing system

A stereo device testing method includes the following steps. Firstly, a stereo device is fixed, and a gas is continuously inputted into an inner space of the stereo device. After a predetermined time period, an internal pressure value of the inner space of the stereo device is detected. By judging whether the internal pressure value is higher than or equal to a default pressure value, the tester may determine whether the stereo device is qualified or not. After the stereo device is tested, the manufacturer of the stereo device may repair the gas leakage position. Since the influence of the gas leakage condition on the resonant effect is minimized, the sound quality of the stereo device is enhanced.

FIELD OF THE INVENTION

The present invention relates to a stereo device, and more particularly to a testing method and a testing system of a stereo device.

BACKGROUND OF THE INVENTION

With increasing development of science and technology as well as industrial and commercial prosperity, people's living standards are gradually increased and the demands on the quality of leisure lives are developed toward sophisticated levels. For example, the hearing effects of sound, the visual changes of light beams or the clarity of images are important issues of the technical development and product development. Moreover, since songs (or music) may provide the function of relaxing the listeners and eliminating stress, songs (or music) are important to the leisure lives. Consequently, a variety of stereo devices are introduced into the market in order to meet the requirements of different users. For example, high-quality stereo devices, stereo devices that produce shocked hearing effects or small-sized portable stereo devices were developed.

Regardless of which type of stereo device is used, the inner space of the stereo device may generate a resonant effect to produce sound. The operating principles of the stereo device will be simply described as follows. Firstly, electric power is supplied to a coil of the stereo device. Consequently, an electric current flows through the coil to generate an electromagnetic field. For example, the frequency of the electromagnetic field is 256 Hz. That is, the number of vibration cycles per second is 256. When an AC power with the frequency of 256 Hz is outputted from the stereo device, the number of times the electric current changes per second is 256. Consequently, the membrane and the coil within the stereo device are subjected to vibration. Due to the vibration of the membrane and the coil, the air within the inner space of the stereo device is vibrated and a resonant effect occurs. In such way, the stereo device can produce sound.

However, a portion of the air may leak out from the inner space of the stereo device. If the amount of air leaking out from the inner space of the stereo device is very large, the resonant effect of the stereo device is adversely affected and the quality of the stereo device is deteriorated.

Therefore, there is a need of providing a stereo device testing method and a stereo device testing system in order to detect a gas leakage condition of the stereo device.

SUMMARY OF THE INVENTION

An object of the present invention provides a stereo device testing method for detecting a gas leakage condition of a stereo device.

Another object of the present invention provides a stereo device testing system for detecting a gas leakage condition of a stereo device.

In accordance with an aspect of the present invention, there is provided a stereo device testing method for detecting a gas leakage condition of a stereo device. The stereo device testing method includes the following steps. Firstly, the stereo device is fixed, and a gas is continuously inputted into an inner space of the stereo device. Then, an internal pressure value of the inner space of the stereo device is detected after a predetermined time period. By judging whether the internal pressure value is higher than or equal to a default pressure value, the tester may determine whether the stereo device is qualified or not. If the internal pressure value is higher than or equal to the default pressure value, the stereo device is qualified. Whereas, if the internal pressure value is lower than the default pressure value, the stereo device is unqualified.

In accordance with another aspect of the present invention, there is provided a stereo device testing system for detecting a gas leakage condition of a stereo device. The stereo device testing system includes a testing fixture, a gas pressure supply module, a gas pressure detector, and a controlling unit. The stereo device is supported and fixed on the testing fixture. The gas pressure supply module is connected with the testing fixture. A gas is continuously provided from the gas pressure supply module to an inner space of the stereo device. The gas pressure detector is connected with the testing fixture. An internal pressure value of the inner space is detected by the gas pressure detector. The controlling unit is connected with the gas pressure detector. A default pressure value is stored in the controlling unit. After a predetermined time period, the controlling unit compares the internal pressure value with the default pressure value, thereby judging whether the stereo device is qualified or not. If the internal pressure value is higher than or equal to the default pressure value, the controlling unit judges that the stereo device is qualified. If the internal pressure value is lower than the default pressure value, the controlling unit judges that stereo device is unqualified.

In accordance with another aspect of the present invention, there is provided a stereo device testing method for detecting a gas leakage condition of a stereo device. The stereo device testing method includes the following steps. Firstly, the stereo device is fixed, and a gas is continuously inputted into an inner space of the stereo device. A gas temperature of the gas is higher than a room temperature, or the gas temperature of the gas is lower than the room temperature. Then, a special color zone which is formed by the gas leaked out from the inner space is observed according to a temperature sensing technology. Then, by judging whether a color of the special color zone is within a standard color range, the tester determines whether the stereo device is qualified or not. If the color of the special color zone is within the standard color range, the stereo device is qualified. Whereas, if the color of the special color zone is not within the standard color range, the stereo device is unqualified.

In accordance with another aspect of the present invention, there is provided a stereo device testing system for detecting a gas leakage condition of a stereo device. The stereo device testing system includes a testing fixture, a gas pressure supply module, a temperature sensor, and a controlling unit. The stereo device is supported and fixed on the testing fixture. The gas pressure supply module is connected with the testing fixture. A gas is continuously provided from the gas pressure supply module to an inner space of the stereo device. The temperature sensor is located near the testing fixture and detects whether there is a special color zone around the stereo device. The controlling unit is connected with the temperature sensor. A standard color range is previously stored in the controlling unit. The controlling unit judges whether a color of the special color zone is within the standard color range, thereby determining whether the stereo device is qualified or not. If the color of the special color zone is within the standard color range, the controlling unit judges that the stereo device is qualified. If the color of the special color zone is not within the standard color range, the controlling unit judges that the stereo device is unqualified.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

For eliminating the drawbacks of the conventional technology, the present invention provides a stereo device testing method and a stereo device testing system.

Hereinafter, a stereo device testing system according to a first embodiment of the present invention will be illustrated with reference toFIGS. 1 and 2.FIG. 1is a schematic perspective view illustrating a stereo device testing system according to the first embodiment of the present invention.FIG. 2is a schematic bottom view illustrating the stereo device testing system according to the first embodiment of the present invention. The stereo device testing system1comprises a testing fixture10, a gas pressure supply module11, a gas pressure detector12, a controlling unit13, a first display device14, and a second display device15. The testing fixture10is used for supporting a stereo device2and fixing the stereo device2thereon. The gas pressure supply module11is connected with the testing fixture10through a pipe (not shown). Moreover, the gas pressure supply module11is used for continuously providing a gas to an inner space20of the stereo device2. The gas pressure detector12is connected with the testing fixture10through a pipe (not shown). Moreover, the gas pressure detector12is used for detecting an internal pressure value of the inner space20of the stereo device2. The controlling unit13is disposed on the testing fixture10and connected with the gas pressure detector12. A default pressure value is stored in the controlling unit13. After a predetermined time period, the controlling unit13compares the internal pressure value with the default pressure value. According to the comparing result, the controlling unit13whether the stereo device2passes the test or not. The predetermined time period may be determined according to the practical requirements. The first display device14is disposed on the testing fixture10and connected with the gas pressure detector12. Moreover, the internal pressure value is shown on the first display device14. The second display device15is disposed on the testing fixture10and connected with the controlling unit13. A pass test message or a failed test message may be shown on the second display device15. In this embodiment, the gas pressure supply module12is a gas pressure gauge, the controlling unit13is a programmable logic controller (PLC), and the first display device14and the second display device15are both display screens.

It is noted that, inFIGS. 1 and 2, the testing fixture10and the gas pressure supply module11are connected with each other and the testing fixture10and the gas pressure detector12are connected with each other through pipes. For clarification and brevity, the pipes are not shown inFIGS. 1 and 2.

Please refer toFIGS. 1 and 2again. The testing fixture10comprises a bracket body101, a master pressure pump102, plural fixing elements103, plural sealing elements104, plural first switch elements105, and plural second switch elements106. The bracket body101is used for supporting the stereo device2. The master pressure pump102is connected with the gas pressure supply module11through a pipe (not shown) in order to receive the gas from the gas pressure supply module11. The plural fixing elements103are disposed on the bracket body101for fixing the stereo device2on the bracket body101. The plural sealing elements104are aligned with plural communication holes21of the stereo device2, respectively. The plural sealing elements104are disposed on the bracket body101and connected with the gas pressure detector12. Moreover, the plural sealing elements104are inserted into the plural communication holes21for closing the plural communication holes21. Each of the plural sealing elements104comprises a gas inlet1041and a gas outlet1042. The gas inlet1041is formed in a bottom of the sealing element104. The gas outlet1042is formed in the bottom of the sealing element104, and located beside the gas inlet1041. Through the gas inlet1041, the gas may be introduced from the master pressure pump102into the inner space20of the stereo device2. Through the gas outlet1042, the gas exhausted from the inner space20of the stereo device2is introduced into the gas pressure detector12.

The plural first switch elements105are connected with the master pressure pump102and the plural gas inlets1041through pipes (not shown). When the first switch element105is turned on, the gas is introduced into the inner space20through the corresponding gas inlet1041. Similarly, the plural second switch elements106are connected with the gas pressure detector12and the plural gas outlets1042through pipes (not shown). When the second switch element106is turned on, the gas is introduced into the gas pressure detector12through the corresponding gas outlet1042. The gas pressure supply module11comprises a gas source111and a pressure booster112. The gas source111is used for continuously providing the gas. The pressure booster112is connected with the gas source111for stabilizing a gas pressure value of the gas or increasing the gas pressure value and transferring the gas to the master pressure pump102of the testing fixture10. The pressure booster112may increase the gas pressure value of the gas to the pressure higher than the normal atmospheric pressure (e.g. 1 Pa). In this embodiment, the plural fixing elements103comprises plural fixing posts and plural fixing plates, and the plural first switch elements105and the plural second switch elements106are all solenoid valves.

Hereinafter, a stereo device testing method according to a first embodiment of the present invention will be illustrated with reference toFIG. 3.FIG. 3is a flowchart illustrating a stereo device testing method according to the first embodiment of the present invention. The stereo device testing method comprises the following steps. In the step A, the stereo device is fixed on the testing fixture, and a gas is continuously inputted into an inner space of the stereo device. In the step B, an internal pressure value of the inner space of the stereo device is detected by the gas pressure detector after a predetermined time period. The step C judges whether the internal pressure value is higher than or equal to a default pressure value, thereby determining whether the stereo device is qualified or not. In the step D, a pass test message or a failed test message is generated according to a result of comparing the internal pressure value with the default pressure value.

The step A comprises sub-steps A1˜A3. In the sub-step A1, the stereo device is fixed on the testing fixture. In the sub-step A2, the pressure booster is used to stabilize or increase a gas pressure value of the gas. In the sub-step A3, the gas is continuously inputted into the inner space of the stereo device. The step D comprises the sub-steps D1and D2. In the sub-step D1, the pass test message is generated. In the sub-step D2, the failed test message is generated. In the step C, if the internal pressure value is higher than or equal to the default pressure value, the stereo device is qualified to pass the test, and then the sub-step D1is performed. In the step C, if the internal pressure value is lower than the default pressure value, the stereo device is unqualified, and then the sub-step D2is performed.

The operations of the stereo device testing method will be illustrated in more details as follows. Please refer toFIGS. 1˜3. Firstly, the step A is performed. The stereo device2is placed on the bracket body101of the testing fixture10, and the stereo device2is fixed on the bracket body101by the plural fixing elements103. Moreover, the plural sealing elements104are aligned with plural communication holes21of the stereo device2, respectively. Then, the plural sealing elements104are driven to be inserted into the plural communication holes21. Consequently, the plural communication holes21are closed by the plural sealing elements104. That is, the sub-step A1is performed. Then, the gas source111is turned on to provide the gas. Moreover, the pressure booster112is used to stabilize or increase the gas pressure value of the gas. That is, the sub-step A2is performed. Afterwards, the gas of the gas pressure supply module11is transferred to the master pressure pump102. The plural first switch elements105are turned on. Consequently, the gas from the master pressure pump102is introduced into the inner space20of the stereo device2through the plural gas inlets1041. That is, the sub-step A3is performed.

After the gas has been continuously introduced into the inner space20for the predetermined time period (e.g. three minutes), the plural second switch element106are turned on by the controlling unit13. Consequently, the gas within the inner space20is introduced into the gas pressure detector12through the plural gas outlets1042. After the gas is detected by the pressure detector12, the internal pressure value of the inner space20is acquired by the pressure detector12. That is, the step B is performed. At the same time, the internal pressure value is transmitted from the pressure detector12to the controlling unit13and the first display device14. Consequently, the internal pressure value is shown on the first display device14.

Then, the controlling unit13compares the internal pressure value with the default pressure value in order to judge whether the stereo device2is qualified or not. That is, the step C is performed. If the internal pressure value is higher than or equal to the default pressure value, the controlling unit13judges that the stereo device2is qualified, and the pass test message is shown on the second display device15. That is, the sub-step D1is performed. On the other hand, if the internal pressure value is lower than the default pressure value, the controlling unit13judges that the stereo device2is unqualified, and the failed test message is shown on the second display device15. That is, the sub-step D2is performed. After the step D is completed, the plural sealing elements104are driven again to be moved away from the plural communication holes21. Consequently, the stereo device2is no longer in the sealed state. After the stereo device2is removed from the testing fixture10, the testing process of the stereo device2is completed. Then, a next stereo device may be tested by the above testing method.

As mentioned above, the gas pressure supply module11of this embodiment comprises the pressure booster112for stabilizing or increasing the gas pressure value of the gas. In case that the gas provided by the gas source is very stable and the gas pressure of the gas is higher than the normal atmospheric pressure, the pressure booster may be omitted from the gas pressure supply module. Under this circumstance, the gas is directly transferred from the gas source to the testing fixture.

The present invention further provides a second embodiment, which is distinguished from the first embodiment. Hereinafter, the structure of a stereo device testing system according to the second embodiment of the present invention will be illustrated with reference toFIG. 4.FIG. 4is a schematic functional block diagram illustrating a stereo device testing system according to the second embodiment of the present invention. The stereo device testing system3comprises a testing fixture30, a first gas pressure supply module31, a gas pressure detector32, a controlling unit33, a first display device34, and a second display device35, a second gas pressure supply module36, and a temperature sensor37. The first gas pressure supply module31is used for providing a first gas. The structures and the operations of the testing fixture30, the first gas pressure supply module31, the gas pressure detector32, the controlling unit33, the first display device34and the second display device35of this embodiment are similar to those of the stereo device testing system of the first embodiment, and are not redundantly described herein. In comparison with the first embodiment, the stereo device testing system3of this embodiment further comprises the second gas pressure supply module36and the temperature sensor37. The second gas pressure supply module36is a second gas source for providing a second gas. The temperature sensor37is located near the testing fixture30for detecting whether there is a special color zone around the stereo device2. If there is the special color zone around the stereo device2, the special color zone is recorded as a gas leakage position of the stereo device2. In this embodiment, the temperature sensor37is an infrared camera.

Hereinafter, a stereo device testing method according to a second embodiment of the present invention will be illustrated with reference toFIG. 5.FIG. 5is a flowchart illustrating a stereo device testing method according to the second embodiment of the present invention. The stereo device testing method comprises the following steps. In the step A′, the stereo device is fixed on the testing fixture, and a first gas is continuously inputted into an inner space of the stereo device. In the step B′, an internal pressure value of the inner space of the stereo device is detected by the gas pressure detector after a predetermined time period. The step C′ judges whether the internal pressure value is higher than or equal to a default pressure value, thereby determining whether the stereo device is qualified or not. In the step D′, a pass test message or a failed test message is generated according to a result of comparing the internal pressure value with the default pressure value. In the step E1′, a second gas is inputted into the inner space of the stereo device. In the step E2′, a special color zone which is formed by the second gas leaked out from the inner space is observed by the temperature sensor, and the special color zone is recorded as a gas leakage position of the stereo device.

The steps A′˜D′ of the stereo device testing method of this embodiment are similar to the steps A˜D of the stereo device testing method of the first embodiment, and are not redundantly described herein. In comparison with the stereo device testing method of the first embodiment, the stereo device testing method of this embodiment further comprises the sub-steps E1′ and E2′. Please refer toFIGS. 4 and 5. After the steps A′˜B′ are performed, if the controlling unit33judges that the stereo device2is unqualified in the step C′, the failed test message is controlled to be shown on the second display device35. That is, the sub-step D2′ is performed. At the same time, the second gas in inputted from the second gas pressure supply module36to the inner space20of the stereo device2. That is, the sub-step E1′ is performed. In this embodiment, the second gas is a high temperature gas, and the temperature of the second gas is higher than the room temperature. The room temperature is the temperature at the position of the stereo device2. Alternatively, in some other embodiments, the second gas is a low temperature gas, and the temperature of the second gas is lower than the room temperature.

After a certain time period, the second gas is leaked out from the inner space20. Since the temperature of the second gas is higher than the room temperature, a special color zone may be formed around the stereo device2by the second gas which is leaked out, and the special color zone may be observed by the temperature sensor37. The color of the special color zone is a warm color. Then, the special color zone is recorded as the gas leakage position of the stereo device2by the temperature sensor37. That is, the sub-step E2′ is performed. After the sub-step E1′ and the sub-step E2′ are performed, the manufacturer of the stereo device2may repair the gas leakage position. Consequently, the stereo device2may produce a good resonant effect, and the sound quality of the stereo device2will be enhanced.

The present invention further provides a third embodiment, which is distinguished from the first embodiment. Hereinafter, the structure of a stereo device testing system according to the third embodiment of the present invention will be illustrated with reference toFIG. 6.FIG. 6is a schematic functional block diagram illustrating a stereo device testing system according to the third embodiment of the present invention. The stereo device testing system4comprises a testing fixture40, a gas pressure supply module41, a temperature sensor42, a controlling unit43, and a display device44. The testing fixture40is used for supporting a stereo device2and fixing the stereo device2thereon. The gas pressure supply module41is connected with the testing fixture40for continuously providing a gas to an inner space20of the stereo device2. In this embodiment, the gas is a low temperature gas, and the temperature of the gas is lower than the room temperature. The temperature sensor42is located near the testing fixture40for detecting whether there is a special color zone around the stereo device2. The controlling unit43is connected with the temperature sensor42. Moreover, a standard color range is previously stored in the controlling unit43. By judging whether the color of the special color zone is within the standard color range, the controlling unit43determines whether the stereo device2is qualified or not. The display device44is disposed on the testing fixture40and connected with the controlling unit43. A pass test message or a failed test message may be shown on the display device44. The structures and the operations of the testing fixture40are similar to the testing fixture10of the stereo device testing system of the first embodiment, and are not redundantly described herein. In this embodiment, the gas pressure supply module41is a gas source.

Hereinafter, a stereo device testing method according to a third embodiment of the present invention will be illustrated with reference toFIG. 7.FIG. 7is a flowchart illustrating a stereo device testing method according to the third embodiment of the present invention. The stereo device testing method comprises the following steps. In the step A*, the stereo device is fixed on the testing fixture, and a gas is continuously inputted into an inner space of the stereo device. In the step B*, a special color zone which is formed by the gas leaked out from the inner space is observed according to a temperature sensing technology. The step C* judges whether a color of the special color zone is within a standard color range, thereby determining whether the stereo device is qualified or not. In the step D*, a pass test message or a failed test message is generated according to a result of judging whether the color of the special color zone is within the standard color range.

The step A* comprises sub-steps A1* and A2*. In the sub-step A1*, the stereo device is fixed on the testing fixture. In the sub-step A2*, the gas is continuously inputted into the inner space of the stereo device. The step D* comprises the sub-steps D1* and D2*. In the sub-step D1*, the pass test message is generated. In the sub-step D2*, the failed test message is generated. In the step C*, if the color of the special color zone is within the standard color range, the stereo device is qualified to pass the test, and then the sub-step D1* is performed. In the step C*, if the color of the special color zone is not within the standard color range, the stereo device is unqualified, and then the sub-step D2* is performed.

The operations of the stereo device testing method will be illustrated in more details as follows. Please refer toFIGS. 6 and 7. Firstly, the step A* is performed. The stereo device2is placed on the testing fixture40, and the stereo device2is fixed on the testing fixture40. Then, the stereo device2is sealed, so that the stereo device2is in a sealed state. That is, the sub-step A1* is performed. Under this circumstance, plural sealing elements (not shown) are driven to be inserted into corresponding communication holes (not shown), and the plural communication holes are closed by the plural sealing elements. Then, the gas pressure supply module41is turned on to provide the gas, and the gas is transferred to a master pressure pump (not shown) of the testing fixture40. Then, plural switch elements (not shown) of the testing fixture40are turned on. Consequently, the gas is introduced into the inner space20of the stereo device2. That is, the sub-step A2* is performed.

After a certain time period, the second gas is leaked out from the inner space20. Since the temperature of the second gas is lower than the room temperature, a special color zone may be formed around the stereo device2by the leaked gas, and the special color zone may be observed by the temperature sensor42. For example, the color of the special color zone is a cold color. That is, the sub-step B* is performed. Then, by judging whether a color of the special color zone is within a standard color range, the controlling unit43determines whether the stereo device2is qualified or not. That is, the step C* is performed. The standard color range is a green color. If the color of the special color zone observed by the temperature sensor42is within the standard color range, it means that the amount of gas leaked out from the inner space20is not too large, and thus the color of the special color zone may be within the standard color range. Under this circumstance, the controlling unit43judges that the stereo device2is qualified, and the pass test message is controlled to be shown on the display device44. That is, the sub-step D1* is performed. On the other hand, if the color of the special color zone observed by the temperature sensor42is not within the standard color range, it means that the amount of gas leaked out from the inner space20is very large, and thus the color of the special color zone. In addition, the color of the special color zone is a cold color. That is, the color of the special color zone is within the cold color range. Under this circumstance, the controlling unit43judges that the stereo device2is unqualified, and the failed test message is controlled to be shown on the display device44. That is, the sub-step D2* is performed. Meanwhile, the testing procedure of the stereo device2is completed.

In some other embodiments, the gas is a high temperature gas with a temperature higher than the room temperature. If the color of the special color zone which is formed by the gas leaked out from the stereo device and observed by the temperature sensor is not within the standard color range, the color of the special color zone observed by the temperature sensor is a warm color. That is, the color is within a warm color range. Regardless of whether the gas is the high temperature gas or the low temperature gas, the stereo device testing method of the present invention is feasible.

From the above descriptions, the present invention provides a stereo device testing method and a stereo device testing system. Firstly, the stereo device is in a sealed state. Then, a gas is inputted into an inner space of the stereo device. Then, by detecting an internal pressure value of the inner space is detected or observing whether a special color zone around the stereo device is formed according to a temperature sensing technology, a gas leakage condition of the stereo device may be realized. After the stereo device is tested, the manufacturer of the stereo device may repair the gas leakage position. Under this circumstance, since the influence of the gas leakage condition on the resonant effect is minimized, the sound quality of the stereo device is enhanced.