Wireless sensor measurement system of self-calibration integrated circuit

A technology of wireless sensing and measurement systems, applied in signal transmission systems, measuring devices, instruments, etc., can solve problems such as large errors in measurement results

Inactive Publication Date: 2011-03-30
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, because the wireless sensor measurement system is often used in harsh environments, such as high temperature

Method used

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  • Wireless sensor measurement system of self-calibration integrated circuit
  • Wireless sensor measurement system of self-calibration integrated circuit
  • Wireless sensor measurement system of self-calibration integrated circuit

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Embodiment Construction

[0015] The present invention will be further described below in conjunction with drawings and embodiments.

[0016] Such as figure 1 As shown, the wireless sensing measurement system integrating self-calibration circuit of the present invention includes a transmitting chip, a passive sensing chip and a pair of resonant coils 5, and the transmitting chip includes a phase-locked loop 1, a power amplifier 2, an amplitude detector 3 and a first The data processor 4, the passive sensor chip includes a load modulator 6, an energy converter 7, a second data processor 8 and an analog-to-digital converter 9; the output end of the phase-locked loop 1 is connected to the input end of the power amplifier 2; The output end of the analog-to-digital converter 9 is connected to the input end of the second data processor 8, and the output end of the second data processor 8 is connected to the load modulator 6; the load modulator 6, the energy converter 7 and a pair of resonant coils One of th...

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PUM

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Abstract

The invention discloses a wireless sensor measurement system of a self-calibration integrated circuit. In the system, the output end of a phase-locked loop is connected with the input end of a power amplifier, and the output end of an amplitude detector is connected with a first data processor; the reference voltage output end of an energy converter is connected with an analog/digital (A/D) converter, the output end of the A/D converter is connected with the input end of a second data processor, and the output end of the second data processor is connected with a load modulator; and the load modulator, the energy converter and one of a pair of resonance coils are connected in parallel, and the power amplifier, the other one of the pair of resonance coils and the amplitude detection are connected in sequence, wherein the A/D converter is provided with a self-calibration circuit, and a self-calibration algorithm circuit is integrated on the first data processor. The wireless sensor measurement system has the advantage that the influences of environment variation, technical errors and the like on measurement precision are weakened.

Description

technical field [0001] The invention relates to a wireless sensor measurement system. The system integrates a self-calibration circuit with high measurement accuracy. Background technique [0002] Wireless sensor measurement technology is widely used in various fields, including real-time monitoring of temperature, humidity, pressure, etc. Due to the significant advantages of low complexity, low cost, and long life, passive sensor chips are more widely used than active sensor chips in wireless sensor measurement systems. The passive wireless sensor measurement system includes two parts: the transmitter chip and the passive sensor chip. The passive sensor chip converts the electromagnetic waves emitted by the transmitter chip into the energy it needs, and converts the variables detected by the sensor into digital signals. , coupled to the transmitter chip. The transmitting chip can detect the digital signal and send it to the single chip microcomputer for processing. [0...

Claims

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Application Information

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IPC IPC(8): G08C17/02G01D21/00
Inventor 李栋沈美根皇甫江涛张斌冉立新
Owner ZHEJIANG UNIV
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