GPS、指南针航向和加速计之间,哪个消耗的电池电量最多?

发布于 2024-12-25 08:10:07 字数 167 浏览 0 评论 0原文

有谁知道 GPS、罗盘航向和加速计哪个消耗最多的电池(或者它们相对比较如何?)

我有点天真地假设它是:

加速计 < >罗盘航向 < GPS

,但我找不到任何东西来证实或反驳我的直觉。

澄清:我很好奇它在 iPhone 上的具体表现如何。

Does anyone know between GPS, compass heading and accelerometer which uses the most amount of battery (or how they compare relatively?)

I'm assuming somewhat naively it's:

accelerometer < compass heading < GPS

but I can't find anything to substantiate or refute my intuitions.

Clarification: I'm curious as to how it performs specifically on an iPhone.

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画离情绘悲伤 2025-01-01 08:10:07

嗯,这确实取决于设备。带有有源天线的 GPS 消耗的电量最多。加速度计和指南针在运行时通常仅消耗毫安电流。一般来说,您的订单是正确的。

具体到 iPhone

  1. GPS:4mA(假设它运行在 3.3V。我找不到数据表)
  2. 指南针:1.2mA
  3. 加速计:0.25mA

Well it really depends on the device. A GPS with an active antenna will consume the most power. Accelerometers and compass usually only draw milliamps when running. Generally your order is correct.

Specifically to the iPhone

  1. GPS: 4mA (Assuming it runs on 3.3V. I cannot find the datasheet)
  2. Compass: 1.2mA
  3. Accelerometer: 0.25mA
无畏 2025-01-01 08:10:07

您的订单是正确的。

  • MEMS 加速度计基于测量电容器(这对于 ADC 来说确实没有任何消耗)。
  • 磁力计(罗盘)基于测量铁阻材料,必须用大的短时电流脉冲 + ADC 来激励铁阻材料。所以消费应该稍微高一点。
  • GPS不仅仅涉及读取ADC,还需要对信号进行处理(通常由FPGA或ASIC),因此功耗较高。

Your order is correct.

  • MEMS accelerometers are based on measuring capacitors (this really do not have any consumption with an ADC).
  • Magnetometers (compass) are based on measuring a ferro-resistive material, which have to be excited with large short-time current pulses + ADC. Therefore the consumption should be a little bit higher.
  • GPS involves more than just reading an ADC, the signal has to be processed (generally by a FPGA or ASIC), therefore the consumption is higher.
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