CN108198403B - Multi-sensor interface circuit suitable for wireless sensor network node - Google Patents
Multi-sensor interface circuit suitable for wireless sensor network node Download PDFInfo
- Publication number
- CN108198403B CN108198403B CN201810165380.2A CN201810165380A CN108198403B CN 108198403 B CN108198403 B CN 108198403B CN 201810165380 A CN201810165380 A CN 201810165380A CN 108198403 B CN108198403 B CN 108198403B
- Authority
- CN
- China
- Prior art keywords
- sensor
- conversion module
- signal
- controlled
- capacitance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000006243 chemical reaction Methods 0.000 claims abstract description 50
- 230000010355 oscillation Effects 0.000 claims description 2
- 238000013461 design Methods 0.000 abstract description 7
- 238000012545 processing Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Signal Processing (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
A multi-sensor interface circuit suitable for wireless sensor network nodes comprises a sensor group, a switch selector, a sensor-current conversion module, a sensor-capacitance conversion module, a controllable ring oscillator and a frequency-digital conversion module. The output end of the sensor group is connected with the input end of the switch selector; one output end of the switch selector is connected with the input end of the sensor-current conversion module, and the other output end of the switch selector is connected with the input end of the sensor-capacitance conversion module; the output end of the sensor-current conversion module is connected with one input end of the controllable ring oscillator, and the output end of the sensor-capacitance conversion module is connected with the other input end of the controllable ring oscillator; the output end of the controllable ring oscillator is connected with the input end of the frequency-digital conversion module. The sensor signal is converted into the frequency domain for processing, the working voltage can be as low as the process threshold voltage, a complex ADC circuit is avoided, the structure is simple, and the low-power consumption design is facilitated; the invention can effectively complete the signal conversion of multiple sensors.
Description
Technical Field
The invention relates to a multi-sensor interface circuit suitable for wireless sensor network nodes, and belongs to the technical field of wireless sensor networks.
Background
The wireless sensor network is a multi-hop self-organizing network system formed by a plurality of cheap micro sensor nodes deployed in a monitoring area in a wireless communication mode, and aims to cooperatively sense, collect and process information of a sensed object in a network coverage area and send the information to an observer. The wireless sensor network technology is a main component of the internet of things technology, wherein the wireless sensor node design is a core technology of the wireless sensor network design technology.
Most of the existing wireless sensor network nodes are powered by a built-in battery, which is beneficial to obtaining longer transmission distance and stronger signal processing capacity, but the limited battery capacity limits the service life of the wireless sensor network nodes, so that the low-power design is a key technical problem of the wireless sensor network and the node design thereof, and the power consumption of a sensor interface circuit is a bottleneck for limiting the power consumption of the wireless sensor network nodes. The existing sensor interface circuit is mostly based on the principle of an analog-digital converter (ADC), and converts a sensor signal into a voltage domain for processing.
Disclosure of Invention
The invention aims to solve the problem of low power consumption design of the existing wireless sensor network node, and provides a multi-sensor interface circuit suitable for the wireless sensor network node.
The technical scheme of the invention is that the multi-sensor interface circuit suitable for the wireless sensor network node comprises a sensor group, a switch selector, a sensor-current conversion module, a sensor-capacitance conversion module, a controllable ring oscillator and a frequency-digital conversion module. The output end of the sensor group is connected with the input end of the switch selector; one output end of the switch selector is connected with the input end of the sensor-current conversion module, and the other output end of the switch selector is connected with the input end of the sensor-capacitance conversion module; the output end of the sensor-current conversion module is connected with one input end of the controllable ring oscillator, and the output end of the sensor-capacitance conversion module is connected with the other input end of the controllable ring oscillator; the output end of the controllable ring oscillator is connected with the input end of the frequency-digital conversion module.
The sensor group provides multiple sensor signals for the switch selector.
The switch selector provides the sensor-to-current conversion module and the sensor-to-capacitance conversion module with the desired sensor signals.
The sensor-to-current conversion module converts the sensor signal into a controlled current signal controlled by the sensor signal.
The sensor-to-capacitance conversion module converts the sensor signal into a controlled capacitance signal that is controlled by the sensor signal.
The controllable ring oscillator converts an input controlled current or controlled voltage signal to a controlled frequency signal that is controlled by a sensor signal.
The frequency-to-digital conversion module converts an input controlled frequency signal to a sensor digital signal.
The switch selector is controlled by a switch control signal in the wireless sensor network node, and transmits one path of input multi-path sensor signals to the input end of the sensor-current conversion module or the sensor-capacitance conversion module.
The working current of the controllable ring oscillator is an output controlled current signal of the sensor-current conversion module, and the load capacitance of the controllable ring oscillator is an output controlled capacitance signal of the sensor-capacitance conversion module.
The frequency-digital conversion module is controlled by a clock signal inside the wireless sensor network node.
Compared with the prior art, the invention converts the sensor signal into the frequency domain for processing, and the working voltage can be as low as the process threshold voltage, thereby avoiding a complex ADC circuit, having simple structure and being beneficial to low-power consumption design; and under the control of the controller and the clock signal in the wireless sensor network node, the multi-sensor signal conversion can be effectively completed.
Drawings
FIG. 1 is a schematic diagram of the operation of the present invention;
FIG. 2 is a diagram of an embodiment of the present invention;
fig. 3 is a block diagram of a controllable ring oscillator of an example of the invention.
Detailed Description
Embodiments of the invention are shown in the figures.
As shown in fig. 2, the multi-sensor interface circuit suitable for the wireless sensor network node of the present embodiment includes a temperature sensor, a humidity sensor, a switch selector, a Proportional To Absolute Temperature (PTAT) current generating circuit, a loop load capacitor, an inverter ring oscillator and a counter.
The embodiment corresponds to the figure 1 of the working principle of the invention, and the temperature sensor corresponds to the sensor group of the humidity sensor; the PTAT current generation circuit corresponds to the sensor-current conversion module; the loop load capacitance corresponds to the sensor-capacitance conversion module; the inverter loop oscillator corresponds to a controllable ring oscillator; the counter corresponds to a frequency-to-digital conversion module.
The temperature and humidity sensor of the present embodiment provides a temperature sensor signal S for the switch selector t And humidity sensor signal S h 。
The switch selector of the embodiment is controlled by a switch control signal D in the wireless sensor network node c The input temperature sensor signal S t Transmitted to PTAT current generation circuit, or humidity sensor signal S to be input h To the loop load capacitance.
The PTAT current generation circuit of the present embodiment will input a temperature sensor signal S t Converted into a controlled current I proportional to absolute temperature change t 。
The loop load capacitance of the present embodiment will input the humidity sensor signal S h Conversion to a controlled capacitance C proportional to the change of the humidity sensor h 。
As shown in fig. 3, the controllable ring oscillator in this embodiment is an inverter ring oscillator, and a positive feedback oscillator is formed by connecting an even number of identical inverters end to end, and its oscillation frequency F s Respectively with controlled current I t Controlled capacitance C h And proportionally vary.
The counter of the embodiment is a 10-bit counter starting from a rising edge, is controlled by the clock signal CLK in the wireless sensor network node, and calculates the input signal F in the period s Thereby generating a corresponding 10-bit sensor digital signal output D s 。
Claims (1)
1. The multi-sensor interface circuit is characterized by comprising a sensor group, a switch selector, a sensor-current conversion module, a sensor-capacitance conversion module, a controllable ring oscillator and a frequency-digital conversion module; the output end of the sensor group is connected with the input end of the switch selector; one output end of the switch selector is connected with the input end of the sensor-current conversion module, and the other output end of the switch selector is connected with the input end of the sensor-capacitance conversion module; the output end of the sensor-current conversion module is connected with one input end of the controllable ring oscillator, and the output end of the sensor-capacitance conversion module is connected with the other input end of the controllable ring oscillator; the output end of the controllable ring oscillator is connected with the input end of the frequency-digital conversion module;
the sensor group provides a plurality of sensor signals for the switch selector;
the switch selector provides the sensor-to-current conversion module and the sensor-to-capacitance conversion module with the required sensor signals;
the sensor-current conversion module converts the sensor signal into a controlled current signal controlled by the sensor signal;
the sensor-capacitance conversion module converts the sensor signal into a controlled capacitance signal controlled by the sensor signal;
the controllable ring oscillator converts an input controlled current or controlled voltage signal into a controlled frequency signal controlled by a sensor signal;
the frequency-digital conversion module converts an input controlled frequency signal into a sensor digital signal;
the switch selector is controlled by a switch control signal in the wireless sensor network node, and transmits one path of input multi-path sensor signals to the input end of the sensor-current conversion module or the sensor-capacitance conversion module;
the working current of the controllable ring oscillator is an output controlled current signal of the sensor-current conversion module, and the load capacitance of the controllable ring oscillator is an output controlled capacitance signal of the sensor-capacitance conversion module;
the frequency-digital conversion module is controlled by a clock signal in the wireless sensor network node;
the controllable ring oscillator is a positive feedback oscillator formed by connecting an even number of identical phase inverters end to end; the oscillation frequency of the controllable ring oscillator is respectively changed in proportion to the controlled current and the controlled capacitance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810165380.2A CN108198403B (en) | 2018-02-28 | 2018-02-28 | Multi-sensor interface circuit suitable for wireless sensor network node |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810165380.2A CN108198403B (en) | 2018-02-28 | 2018-02-28 | Multi-sensor interface circuit suitable for wireless sensor network node |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108198403A CN108198403A (en) | 2018-06-22 |
| CN108198403B true CN108198403B (en) | 2024-02-06 |
Family
ID=62594260
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810165380.2A Active CN108198403B (en) | 2018-02-28 | 2018-02-28 | Multi-sensor interface circuit suitable for wireless sensor network node |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108198403B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011104603A1 (en) * | 2010-02-23 | 2011-09-01 | パナソニック電工株式会社 | Wireless transmitter/receiver, wireless communication device, and wireless communication system |
| CN104485938A (en) * | 2015-01-13 | 2015-04-01 | 合肥工业大学 | Low-power-consumption capacitance type sensor interface circuit |
| CN104568208A (en) * | 2015-01-13 | 2015-04-29 | 合肥工业大学 | Temperature sensor integrated with radio frequency identification label |
| CN207867703U (en) * | 2018-02-28 | 2018-09-14 | 华东交通大学 | A kind of multisensor interface circuit suitable for wireless sensor network node |
-
2018
- 2018-02-28 CN CN201810165380.2A patent/CN108198403B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011104603A1 (en) * | 2010-02-23 | 2011-09-01 | パナソニック電工株式会社 | Wireless transmitter/receiver, wireless communication device, and wireless communication system |
| CN104485938A (en) * | 2015-01-13 | 2015-04-01 | 合肥工业大学 | Low-power-consumption capacitance type sensor interface circuit |
| CN104568208A (en) * | 2015-01-13 | 2015-04-29 | 合肥工业大学 | Temperature sensor integrated with radio frequency identification label |
| CN207867703U (en) * | 2018-02-28 | 2018-09-14 | 华东交通大学 | A kind of multisensor interface circuit suitable for wireless sensor network node |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108198403A (en) | 2018-06-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Popovici et al. | Power management techniques for wireless sensor networks: a review | |
| WO2016112719A1 (en) | Temperature sensor integrated in rfid label | |
| CN104333891A (en) | Low-power WiFi communication chip based on passive awakening and method thereof | |
| US9218736B2 (en) | Sensor nodes, apparatuses, and methods for wirelessly transmitting data to a power infrastructure | |
| WO2016112720A1 (en) | Low-power-consumption capacitive sensor interface circuit | |
| CN208937194U (en) | It is a kind of towards power equipment on-line temperature monitoring without source point temperature measuring equipment | |
| CN104019917A (en) | Wind turbine generator gear case remote monitoring device | |
| CN108198403B (en) | Multi-sensor interface circuit suitable for wireless sensor network node | |
| CN103575306A (en) | Passive wireless multi-parameter sensor system and multi-parameter measurement method thereof | |
| CN205018795U (en) | Cooking pot | |
| CN106470036A (en) | A kind of low-power consumption RSSI numeral adc circuit design | |
| CN118338392A (en) | Wireless sensor node, working method thereof and wireless sensor network | |
| CN110329307A (en) | A kind of passive and wireless shaft temperature monitoring system | |
| CN111929493B (en) | Current acquisition equipment and circuit monitoring system | |
| CN207867703U (en) | A kind of multisensor interface circuit suitable for wireless sensor network node | |
| CN204556022U (en) | A kind of temperature/humiditydetection detection system based on ZigBee | |
| CN106817165B (en) | Fiber optic network formula sensor, fiber optic network formula sensor monitoring system and its monitoring method waken up based on optic communication | |
| Estrada-López et al. | Technology enabling circuits and systems for the internet-of-things: An overview | |
| US8830108B2 (en) | Circuit arrangement for detecting and digitizing an analog input signal, and field device for process instrumentation | |
| Ascariz et al. | System for measuring power supply parameters with ZigBee connectivity | |
| Nowbahari et al. | An oscillator-based wake-up receiver for wireless sensor networks | |
| TW201324499A (en) | Oscillating device for frequency detection, ultrasonic transceiver system and frequency detection method thereof | |
| JP6808742B2 (en) | Wireless battery system | |
| CN103095621A (en) | High speed broadband Frequency Shift Keying (FSK) demodulator circuit | |
| Adinya et al. | Transceiver energy consumption models for the design of low power wireless sensor networks |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |