Sensing system, method and apparatus
In accordance with an example embodiment of the present invention, a system is disclosed. The system comprises a first sensing unit ( 11 ) adapted to detect change in a parameter and produce an electrical signal ( 12 ) based on the detection; and a memristive unit ( 13 ) electrically coupled to the first sensing unit ( 11 ), wherein the memristive unit ( 13 ) is adapted to switch between a first and a second states based on the electrical signal ( 12 ) produced by the first sensing unit ( 11 ), wherein the resistance value of the memristive unit ( 13 ) in the first state is lower than the resistance value of the memristive unit ( 13 ) in the second state. The system further comprises at least one additional sensing unit ( 14 ) electrically coupled to the memristive unit ( 13 ), wherein the at least one additional sensing unit ( 14 ) is adapted to stand by when the memristive unit ( 13 ) is in the second state, and perform measurement of a parameter when the memristive unit ( 13 ) is in the first state. A method ( 21 - 26 ) and apparatus for sensing parameters are also disclosed.
1. A system, comprising:
a first sensing unit adapted to detect change in a parameter and produce an electrical signal based on the detection;
a memristive unit electrically coupled to the first sensing unit, wherein the memristive unit is adapted to switch between a first and a second state based on the electrical signal produced by the first sensing unit, wherein the resistance value of the memristive unit in the first state is lower than the resistance value of the memristive unit in the second state; and
at least one additional sensing unit electrically coupled to the memristive unit, wherein the at least one additional sensing unit is adapted to stand by when the memristive unit is in the second state, and perform measurement of the parameter when the memristive unit is in the first state.
2. The system of claim 1 , wherein the parameter is selected from the group of: mechanical deformations, temperature, humidity, magnetic field, luminance, ambient light, ultra-violet or infra-red light, flow of gas or liquid, chemical and biological parameters.
3. The system of claim 1 , wherein the memristive unit is adapted to switch to the first state when the current value of the electrical signal produced by the first sensing unit is above a threshold value, and decay to the second state if the current value of said electrical signal is below the threshold value or if the polarity of said electrical signal changes to opposite.
4. The system of claim 1 , wherein the memristive unit comprises a material selected from the group of: metal oxides, and chalcogenides.
5. The system of claim 1 , wherein the first sensing unit and the at least one additional sensing unit are electrically coupled to the memristive unit in parallel.
6. The system of claim 1 , comprising a processing unit electrically coupled to the memristive unit.
7. The system of claim 6 , wherein:
the at least one additional sensing unit and/or the first sensing unit is electrically coupled to the processing unit,
the at least one additional sensing unit and/or the first sensing unit is further adapted to produce an electrical signal based on the measurement, and
the processing unit is adapted to receive and digitize the electrical signal produced by the at least one additional sensing unit and/or the first sensing unit.
8. The system of claim 6 , wherein:
the processing unit is adapted to send a termination signal to the memristive unit; and
the memristive unit is adapted to receive the termination signal from the processing unit and switch to a higher resistance state upon receiving said signal.
9. The system of claim 1 , wherein the first sensing unit, the memristive unit and the at least one additional sensing unit form a single device.
10. The system of claim 1 , wherein the first sensing unit, the memristive unit and the at least one additional sensing unit are separate devices.
11. The system of claim 1 , comprising a power supply unit electrically coupled to the first sensing unit, wherein the power supply unit is adapted to provide power to the first sensing unit.
12. The system of claim 1 , wherein the first sensing unit is adapted to detect the change in the parameter continuously or discretely with a predetermined frequency.
13. A method, comprising:
detecting change in a parameter by a first sensing component;
producing an electrical signal by the first sensing component based on the detection;
providing the electrical signal to a memristive component;
switching the memristive component to a first or a second state based on the provided electrical signal produced by the first sensing component, wherein the resistance value of the memristive component in the first state is lower than the resistance value of the memristive component in the second state;
starting measurement of the parameter by at least one additional sensing component when the memristive component switches to the first state; and
terminating measurement of the parameter by the at least one additional sensing component when the memristive component switches to the second state.
14. The method of claim 13 , wherein detecting the change in the parameter is performed continuously or discretely with a predetermined frequency.
15. The method of claim 13 , wherein switching the memristive component to the first state is performed when a current value of the electrical signal produced by the first sensing component reaches a threshold level.
16. The method of claim 13 , further comprising:
producing another electrical signal by the at least one additional sensing component based on the measurement of the parameter;
providing the electrical signal produced by the at least one sensing component to a processing component, and
digitizing the electrical signal produced by the at least one additional sending component by the processing component.
17. The method of claim 13 , further comprising:
sending a termination signal from the processing component to the memristive component, and
switching the memristive component to the second state when the termination signal is received from the processing component.
18. An apparatus comprising
at least one processor;
at least one memory coupled to the at least one processor, the at least one memory comprising program code instructions which, when executed by the at least one processor, cause the apparatus to perform:
detecting change in a parameter by a first sensing component;
producing an electrical signal by the first sensing component based on the detection;
providing the electrical signal to a memristive component;
switching the memristive component to a first or a second state based on the provided electrical signal produced by the first sensing component, wherein the resistance value of the memristive component in the first state is lower than the resistance value of the memristive component in the second state;
starting measurement of the parameter by at least one additional sensing component when the memristive component switches to the first state; and
terminating measurement of the parameter by the at least one additional sensing component when the memristive component switches to the second state.