CN109951411A - A kind of sensor array data acquisition system based on frequency modulation(PFM) and frequency division multiplex - Google Patents
A kind of sensor array data acquisition system based on frequency modulation(PFM) and frequency division multiplex Download PDFInfo
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- CN109951411A CN109951411A CN201910257753.3A CN201910257753A CN109951411A CN 109951411 A CN109951411 A CN 109951411A CN 201910257753 A CN201910257753 A CN 201910257753A CN 109951411 A CN109951411 A CN 109951411A
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- sensor
- frequency modulation
- sensor array
- pfm
- division multiplex
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Abstract
The present invention provides a kind of sensor array data acquisition system based on frequency modulation(PFM) and frequency division multiplex, it include the sensor array (2) formed by being no less than two sensors (1), frequency modulation circuit (3), system on a ship chip (4) with demodulator (6) and analog-digital converter (7), each sensor (1) interconnects on unilateral pin and is ultimately connected to the electric wire ground terminal (5) of the system on a ship chip (4) with demodulator and analog-digital converter, the other side pin of each sensor (1) is interconnected and is ultimately connected to by respective frequency modulation circuit (3) afterwards on the port of the analog-digital converter (7) of the system on a ship chip (4) with demodulator and analog-digital converter.System of the invention reduces cabling complexity, component cost, improves system stability.
Description
Technical field
The present invention relates to the systems for carrying out distributed data acquisition by sensor array, especially a kind of to be based on frequency tune
The sensor array data acquisition system of system and frequency division multiplex, belongs to information science technology field.
Background technique
With the arriving of the internet of things era, distributed sensor is widely used.Especially sensor array columns
There are a many applications, such as sleep monitor in national health and medical field according to acquisition, fetal monitoring, eeg monitoring, cardioelectric monitor,
Whole-body temperature monitoring, is all each position for needing for sensor to be distributed in body；In addition in 5G and millimetre-wave radar field, by
Also there is the scene of 64 or 128 aerial arrays in the phased array system that high-frequency signal transmitting-receiving uses, needs to mutiple antennas or biography
Feel cell array and carries out line.However be attached mainly or by the way of in parallel at present, i.e., N number of sensor needs N's
Several cablings connection again, such topological structure keep the cabling of whole system very mixed and disorderly unordered, and largely effect on system can
By property and robustness.Thus, today that the connection type of traditional sensor parallel is greatly increased in number of sensors, not
It is applicable in again.
Summary of the invention
The purpose of the present invention is:
For the technology short slab of the above-mentioned prior art, a kind of sensor based on frequency modulation(PFM) and frequency division multiplex is provided
Array data acquisition system has the connection type for not increasing cabling complexity with number of sensors, by sensor
It is inserted into frequency modulation circuit and the mode of demodulator is added in data processing module, realize concatenated connection method, Jiang Neng great
The big complexity for reducing cabling, and more structurally sound sensor array data acquisition is finally provided.
The purpose of the present invention can be realized by technical solution below:
A kind of sensor array data acquisition system based on frequency modulation(PFM) and frequency division multiplex includes by no less than
Sensor array, the frequency modulation circuit, the system-level integrated electricity with demodulator and analog-digital converter of two sensors composition
Road chip, each sensor is interconnected and is ultimately connected on unilateral pin is with demodulator and analog-digital converter
The electric wire ground terminal of irrespective of size IC chip, the other side pin of each sensor pass through mutual after respective frequency modulation circuit
Connect and be ultimately connected to the port of the analog-digital converter of the system on a ship chip with demodulator and analog-digital converter
On.
The sensor is pressure sensor.
The sensor is specifically as follows piezoelectric pressure indicator, piezoresistive pressure sensor, accelerometer formula pressure
Sensor, capacitance pressure transducer, gas-pressure type pressure sensor, electrochemical sensor, temperature sensor and/or optical sensing
Device.
The sensor array is classified as row, column, matrix and/or multichain arrangement.
The frequency modulation circuit includes voltage controlled oscillator.
The frequency modulation circuit further includes amplifier, and amplifier can be omitted.
The system on a ship chip with demodulator and analog-digital converter includes data processing, stores and transmits
Module.
Present invention can apply to the array systems of 2 multiple sensors of any of the above；If system on a ship chip has
Multiple analog-digital converters, each analog-digital converter (can be connect a set of using system of the invention on i.e. each analog-digital converter
This system).In addition, for those of ordinary skills, it can be modified or changed according to the above description, and it is all this
A little modifications and variations should all belong to the protection domain of appended claims of the present invention.
The beneficial effects of the present invention are:
Sensor array data acquisition system based on frequency modulation(PFM) and frequency division multiplex of the invention, reduces cabling
Complexity, component cost, improve system stability:
1. substantially reducing the cabling number and complexity of data collection system, stability is improved:
The cabling number of traditional data acquisition system is linearly increasing as the growth of number of sensors is presented, and the present invention can protect
The cabling number for demonstrate,proving a large amount of sensor arrays is similar with the cabling number of single sensor, reduces wiring difficulty, it is steady to improve system
It is qualitative.
2. reducing the demand number of Analog-digital Converter interface, cost is reduced:
Required Analog-digital Converter interface is acquired as sensor array data, it is with high costs；And even if having simultaneously more
A Analog-digital Converter interface, they are also difficult to read simultaneously, need to switch.The present invention realizes large-scale sensor array still
The solution for only needing an Analog-digital Converter interface, substantially reduces system cost:
3. easy to operate without any external rate-determining steps.
Certain concatenated sensor arrays need complicated rate-determining steps, and the present invention directly acquires all the sensors data,
And all the sensors data are directly read by modulation /demodulation, and software and hardware resources are saved, it is easy to operate.
Detailed description of the invention
One of Fig. 1 is the structural diagram of the present invention.
Fig. 2 is second structural representation of the invention, includes voltage controlled oscillator 8 and amplifier 9.
Figure label and character are as follows:
1, sensor (S)；2, sensor array；3, frequency modulation circuit；4, system on a ship chip (SoC)；5,
Electric wire ground terminal (GND)；6, demodulator (Demod)；7, analog-digital converter (ADC)；8, voltage controlled oscillator (VCO)；9, amplifier
(Amp)。
Specific embodiment
The present invention will be further explained below with reference to the attached drawings and specific examples.
As shown in Figure 1, the sensor array data acquisition system of the invention based on frequency modulation(PFM) and frequency division multiplex,
It include by being no less than the sensor array 2 that two sensors 1 form, frequency modulation circuit 3, turning with demodulator 6 and modulus
The system on a ship chip 4 of parallel operation 7.Sensor array 2 is row, column, matrix and/or multichain arrangement.
Each sensor 1 interconnects on unilateral pin and is ultimately connected to the system with demodulator and analog-digital converter
The electric wire ground terminal 5 of grade IC chip 4, the other side pin of each sensor 1 pass through mutual after respective frequency modulation circuit 3
It is connected and is ultimately connected to the analog-digital converter 7 of the system on a ship chip 4 with demodulator and analog-digital converter
On port.System on a ship chip 4 may include data processing, store and transmit module, by frequency modulation circuit 3,
This system can read the data of some sensor and quickly scan the data of full array, and is acquired, deposits to data
Storage or transmission.
The sensor 1 is mainly pressure sensor, is specifically as follows piezoelectric pressure indicator, pressure drag type pressure sensing
Device, accelerometer formula pressure sensor, capacitance pressure transducer, gas-pressure type pressure sensor, electrochemical sensor, temperature pass
Sensor and/or optical sensor.
As shown in Fig. 2, the frequency modulation circuit 3 includes voltage controlled oscillator 8, it further include amplifier 9, amplifier 9 can
To omit.
Sensor array data acquisition system based on frequency modulation(PFM) and frequency division multiplex of the invention, passes through each biography
The frequency modulation circuit 3 of sensor 1 controls frequency range of the data in frequency domain of some or certain sensors 1.If shared N number of
Sensor 1, each sensor 1 will correspond to the modulation of voltage controlled oscillator 8 by it.In system on a ship chip 4
Demodulator 6 will be enabled through demodulating, and obtain the data for being located at corresponding 8 frequency of voltage controlled oscillator, corresponding Mr. Yu's sensor 1.In this way may be used
The reading of all the sensors 1 in data or scanning sensor array 2 easily to read some sensor 1, step letter
Single, data are accurate.In this way in the case where not influencing performance, realizes that cabling is most simplified, improve the stability of system.
Present invention can apply to the array systems of 2 multiple sensors of any of the above；If system on a ship chip has
Multiple analog-digital converters, each analog-digital converter (can be connect a set of using system of the invention on i.e. each analog-digital converter
This system).Whole system is not necessarily to additional software and hardware control overhead, realizes single sensor, multiple sensors or all sensings
The data acquisition of device stores and transmits.
Embodiment 1
As shown in Fig. 2, the sensor array is made of 4 sensors 1, sensor 1 is all made of piezoelectric transducer.It is all
The side pin of sensor 1 is connected with each other and is ultimately connected on system on a ship chip 4.System on a ship chip
4 include demodulator 6 and analog-digital converter 7.Another pin of sensor 1 is connected on corresponding frequency modulation circuit 3, frequency
Modulation circuit 3 includes voltage controlled oscillator 8 and amplifier 9, is consecutively connected to the frequency modulation circuit 3 of next sensor 1
One end is ultimately connected on system on a ship chip 4.
When work, the reading of analog-digital converter is the modulation result of each sensor 1 voltage controlled oscillator 8 corresponding with its.
Reading (the Input of analog-digital converter 7ADC) are as follows:
InputADC=S1*ei*2π*fVCO1+S2*ei*2π*fVCO2+S3*ei*2π*fVCO3+S4*ei*2π*fVCO4
Wherein, S is sensor, and e is natural Exponents, and i is imaginary unit, and fVCO is the centre frequency of voltage controlled oscillator.
The frequency division multiplex signal total to this, by demodulator 6, the available spy corresponding to some sensor 1
Levy the numerical value of frequency, i.e., the reading (S of sensor 1 thusn):
Sn=Demod (InputADC,fVCOn)
Wherein, Demod is demodulator, InputADCFor the reading of analog-digital converter 7, fVCOFor the center frequency of voltage controlled oscillator
Rate.
Although describing here by some or certain particular arrangements and illustrating the present invention, purpose does not simultaneously lie in limit
The details is made, because may have various modifications and structure change within the scope of patent requirements, without departing from spirit.
The present invention relates to be partially the same as those in the prior art or can be realized by using the prior art.
Claims (7)
1. a kind of sensor array data acquisition system based on frequency modulation(PFM) and frequency division multiplex, it is characterised in that include
By being no less than the sensor array (2) that two sensors (1) form, frequency modulation circuit (3), with demodulator (6) and modulus
The system on a ship chip (4) of converter (7), each sensor (1) interconnect on unilateral pin and finally connect
It is connected to the electric wire ground terminal (5) of the system on a ship chip (4) with demodulator and analog-digital converter, each sensor (1)
Other side pin interconnected afterwards by respective frequency modulation circuit (3) and be ultimately connected to turn with demodulator and modulus
On the port of the analog-digital converter (7) of the system on a ship chip (4) of parallel operation.
2. a kind of acquired based on the sensor array data of frequency modulation(PFM) and frequency division multiplex as described in claim 1 is
System, it is characterised in that the sensor (1) is pressure sensor.
3. a kind of acquired based on the sensor array data of frequency modulation(PFM) and frequency division multiplex as described in claim 1 is
System, it is characterised in that the sensor (1) is piezoelectric pressure indicator, piezoresistive pressure sensor, accelerometer formula pressure
Sensor, capacitance pressure transducer, gas-pressure type pressure sensor, electrochemical sensor, temperature sensor and/or optical sensing
Device.
4. a kind of acquired based on the sensor array data of frequency modulation(PFM) and frequency division multiplex as described in claim 1 is
System, it is characterised in that the sensor array (2) is row, column, matrix and/or multichain arrangement.
5. a kind of acquired based on the sensor array data of frequency modulation(PFM) and frequency division multiplex as described in claim 1 is
System, it is characterised in that the frequency modulation circuit (3) includes voltage controlled oscillator (8).
6. a kind of acquired based on the sensor array data of frequency modulation(PFM) and frequency division multiplex as claimed in claim 5 is
System, it is characterised in that the frequency modulation circuit (3) further includes amplifier (9).
7. a kind of acquired based on the sensor array data of frequency modulation(PFM) and frequency division multiplex as described in claim 1 is
System, it is characterised in that the system on a ship chip (4) includes data processing, stores and transmits module.
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| CN201910257753.3A CN109951411A (en) | 2019-04-01 | 2019-04-01 | A kind of sensor array data acquisition system based on frequency modulation(PFM) and frequency division multiplex |
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| CN110823283A (en) * | 2019-09-29 | 2020-02-21 | 大族激光科技产业集团股份有限公司 | Capacitance and temperature signal sensor |
| CN111811385A (en) * | 2020-06-24 | 2020-10-23 | 华中科技大学 | Double-axis capacitance displacement detection device and method based on double modulation method |
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| USH1626H (en) * | 1993-01-28 | 1997-01-07 | Kersey; Alan D. | Fiber optic network system with low crosstalk using code-division multiplexing |
| US5917597A (en) * | 1998-02-04 | 1999-06-29 | Litton Systems, Inc. | Noise suppression apparatus and method for time division multiplexed fiber optic sensor arrays |
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| CN110823283A (en) * | 2019-09-29 | 2020-02-21 | 大族激光科技产业集团股份有限公司 | Capacitance and temperature signal sensor |
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| CN111811385B (en) * | 2020-06-24 | 2022-03-25 | 华中科技大学 | Double-axis capacitance displacement detection device and method based on double modulation method |
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Application publication date: 20190628 |