Ambient temperature measurement

摘要

A temperature measuring device includes a heat plate exposed to the ambient, one or more sensor chips, and one or more device electronics that include a power transmitter, a wireless communication receiving block, and a processor. Each sensor chip includes a wireless communication transmitting block, a temperature sensor, a signal processing block, and an energy harvesting circuit. The heat plate and the sensor chips are positioned within an indent formed in an exposed surface of a device cover, such as a glass cover. The energy harvesting circuit harvests energy from an electromagnetic signal transmitted by the power transmitter. Temperature data sensed by each temperature sensor is wirelessly transmitted by the wireless communication transmitting block to the wireless communication receiving block. The processor determines an ambient temperature corrected for heat influences on the temperature sensors by internal device electronics. The temperature measuring device is implemented within a mobile electronics device.

主权项

1. An electronics device having a device housing and one or more heat generating device electronics positioned within the device housing, the electronics device comprising:
the device electronics comprising a power transmitter configured to transmit an electromagnetic signal; a first sensor chip comprising a first temperature sensor thermally coupled to a heat plate exposed to an ambient environment, the first sensor chip configured to measure first temperature data, a first energy harvesting circuit configured to harvest energy from the transmitted electromagnetic signal, and a first wireless communication transmitting block configured to transmit the first temperature data; a second sensor chip comprising a second temperature sensor configured to measure second temperature data, a second energy harvesting circuit configured to harvest energy from the transmitted electromagnetic signal, and a second wireless communication block configured to transmit the second temperature data; the device electronics comprising a wireless communication receiving block configured to receive the transmitted first temperature data and the transmitted second temperature data; and the device electronics comprising a processor coupled to the wireless communication receiving block and configured to calculate an ambient temperature according to the first temperature data and the second temperature data.