Background technology
In product test, often need to use a kind of device of controlling power switch, for example, in the test of TV set-top box, comprise a switching on and shutting down experiment.Purpose is the test machine top box, and can this stand the high pressure of moment when switching on and shutting down, and can power panel and mainboard normally play machine and reset and whether FLASH can the normal storage program.Prior art is to utilize easy counter to come the switch of controller top box, to realize the purpose of power on/off.
Therefore, how to realize the automatic control of test process, become an important topic that improves detection efficiency.
Summary of the invention
The purpose of this utility model is to overcome the defective that exists in the above-mentioned prior art, proposes a kind of power supply counting break-make device, realizes the automatic control of test process with this, improves and produces and detection efficiency.
The power supply counting break-make device that the utility model proposes comprises: a counter and a relay that is connected with this counter, described counter is provided with the time module is set, and described relay is according to the ON/OFF of the level signal pilot relay power supply of counter triggers.
In a preferred embodiment of the present utility model, described counter also is provided with the time showing module and resets/pause switch.
The utility model has compared with prior art improved conventional efficient and science widely, and has realized the robotization control of test process.
Embodiment
As shown in Figure 1, the power supply counting break-make device that the utility model proposes comprises: a counter and a relay that is connected with this counter.Described counter is provided with the time and module, LED display module are set and reset/pause switch, and described relay is connected with load, according to the ON/OFF of the level signal pilot relay power supply of counter triggers.
During work, the time of playing machine once more after needed time of set-top-box opening load that is provided with that can be artificial and the shutdown, by the counter quantification of next accurate realization time, and in time to the relay triggering level.For example, when counter is sent high level signal, drive relay and be in " often opening " working position, the closed circuit of connecting for set-top box provides power supply, makes its operate as normal.Otherwise, when counter is sent low level signal, drive relay and be in " disconnection " position, disconnect the power supply of set-top box, make its shutdown, wait for power-on command next time.Switching by high-low level drives the operate as normal with pilot relay so repeatedly, reaches the experiment purpose of the timely discontinuity switching on and shutting down of set-top box.
In an embodiment of the present utility model, workflow is as follows;
1, behind the power supply counting break-make device incoming transport power supply, by the time module is set time parameter is set, as be provided with usually set-top box to play the machine time be 15 seconds, the shutdown intervals time is 5 seconds;
2, the set-top box power lead is inserted power supply counting break-make device, and open the set-top box switch, it is in treats duty;
3, opening power counting break-make device master switch is started working, when display module shows that the test duration reaches, and the power supply of relay automatic cutout set-top box; When display module showed that power-off time arrives at interval, relay was connected the working power of set-top box to be measured once more.
The pattern that the utility model adopts counter and relay to jointly control has improved conventional efficient and science widely, and has realized the robotization control of test process.
The utility model can be made single-chip microcomputer, the test of Convenient switch onoff.