A solar bioelectrical impedance spectrometer, comprising:
- a microprocessor module;
- a radio module connected with the microprocessor module;
- a spectrometer module connected with the microprocessor module;
- a battery management module;
- a battery module connected with the battery management module;
- a solar power supply management module separately connected with the battery management module and the microprocessor module;
- and
- a wearable solar cell module connected with the solar power supply management module;
- wherein:
- the battery management module is configured for receiving current output from the solar power supply management module under a preset condition and charging the battery module by the current;
- the spectrometer module comprises an impedance network analyzer, a differential amplifier connected with the impedance network analyzer, and a wide-band current source connected with the impedance network analyzer;
- the solar power supply management module comprises:
- a first switch connected with the wearable solar cell module;
- an enhancement circuit connected with the first switch;
- a first diode connecting the enhancement circuit with the spectrometer module;
- a control voltage generator connected with the wearable solar battery module;
- a second diode connecting the control voltage generator with the spectrometer module;
- a second switch connected with the wearable solar battery module;
- a transistor, of which the gate is connected with the control voltage generator and the drain or source is connected with the second switch;
- a third diode connecting the source or the drain of the transistor with the spectrometer module;
- a third switch connecting the control voltage generator with the spectrometer module;
- a fourth switch connected with the wearable solar battery module;
- and
- a fourth diode connecting the fourth switch with the spectrometer module;
- the battery management module is connected with the second diode and the control voltage generator;
- the microprocessor module is configured to calculate a reference voltage value according to the output voltage of the wearable solar battery module and determine and control on/off states of the first switch, the second switch, the third switch and the fourth switch according to the reference voltage value;
- when the reference voltage value is lower than a first voltage threshold, the microprocessor module is configured to turn on the first switch and turn off the other three switches at the same time;
- when the reference voltage value reaches or exceeds the first voltage threshold and is lower than a second voltage threshold, the microprocessor module is configured to turn on the fourth switch and turn off the other three switches at the same time;
- and
- when the reference voltage value reaches or exceeds the second voltage threshold, the microprocessor module is configured to turn on the second switch and the third switch, and turn off the other two switches at the same time.