无法更改日志记录设备上的内容

我有以下项目，需要一些建议。1。我有10套测井设备。每个设备登录到一个USB闪存驱动器。基本上在USB 2的根中创建文本文件。我有PIC 32，我需要用到一些如何从每个日志记录设备中检索文本文件。由于支持冻结，我无法更改日志记录设备上的内容。我正在考虑用MECHANCAL继电器设计一个威廉希尔官方网站来切换USB闪存驱动器如下：1。在正常情况下，USB闪存驱动器将连接到日志记录设备。2。如果我想从USB检索文本文件，我会激活继电器切换USB闪存驱动器到PIC，所以我可以读取USB和获取数据。此时，USB闪存驱动器将与日志记录设备断开连接。三。在检索到文本文件后，通过继电器进行切换，从而使USB闪存驱动器恢复到日志记录设备。我的问题是我可以使用USB继电器线路上的低功率继电器吗？D+，D，功率，GND。我无法承受USB端口在日志记录设备上的爆炸，因为它已经失去了支持。有什么可以帮助的建议吗？测井仪是USB 2接口。

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I have following project and need some advice.
1. I have set of 10 logging devices. Each device logs to a u*** flash drive. Basically creates a text file in root of u***.
2. I have pic 32 which I need to use to some how retrieve text files from each logging device. I cannot change an thing on logging devices since support is frozen.

I'm thinking of designing a circuit with mechincal relays to switch u*** flash drive as follows:

1. On normal scenario, u*** flash drive will connect to logging device.
2. If I want to retrieve text files from u*** I will activate relay to switch u*** flash drive to pic so I can read u*** and get data. At this point the u*** flash drive will be disconnected from logging device.
3. After retrieved text files, switch back via relay so u*** flash drive connects back to logging device.

My question is can I use low power relay on u*** signal lines? D+,D- ,POWER ,GND. I cannot afford to blow up u*** port on logging device since it's out of support. Any advice that could help?

Logging device is u*** 2.0 interface.

李天竹

2019-5-10 16:02:16

我会重做日志记录设备。如果某些东西不被支持，它最终会崩溃，你必须重做它们。此外，你可以让你的PIC32看起来像一个闪存驱动器使用USB OTG到你的日志记录设备。然后你就可以得到数据，做任何你想用它。继电器肯定会工作。正如我所记得的，USB连接器是按特定顺序闭合触点的，所以您可能需要一组继电器来模拟这一点。此外，如果使用高速USB，可能需要D+/D线的RF继电器。

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以下为原文

I would redo the logging devices. If something is not supported, it will eventually break and you will have to redo them anyway.

Also, you can make your PIC32 look like a flash drive to your logging device using USB OTG. Then you will be able to get the data and do whatever you want with it.

Relays will certainly work. As I remember, USB connectors are made to close contacts in certain order, so you may need a set of relays to emulate this. Also, RF relays for D+/D- lines may be needed if you use high speed USB.