CN108981788A - A kind of modular sensor circuit - Google Patents
A kind of modular sensor circuit Download PDFInfo
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- CN108981788A CN108981788A CN201810879465.7A CN201810879465A CN108981788A CN 108981788 A CN108981788 A CN 108981788A CN 201810879465 A CN201810879465 A CN 201810879465A CN 108981788 A CN108981788 A CN 108981788A
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Abstract
The present invention discloses a kind of modular sensor circuit, the circuit includes voltage regulator circuit, power isolation module, power supply circuit, sensor probe, sensor combinations module and control chip, analog-digital converter is connected between control chip and sensor probe, sensor combinations module includes at least two sensor modules, the output end at the end PC is connect with the input terminal of first sensor module, the output end of first sensor module is electrically connected with the input terminal of second sensor module, and the output of second sensor module terminates to the input terminal at the end PC.Sensor of all categories can be made into standard modular structure by modular sensor circuit of the invention, realize any combination of all kinds of individual sensors, and the self-powered isolator of each sensor module can be made to power to sensor probe, anti-interference ability is high, and sensor probe can be in the environmental applications of certain potential difference.
Description
[technical field]
The present invention relates to technical field of industrial control, specifically, being related to a kind of modular sensor circuit.
[background technique]
At present in terms of the sensor technology of field of intelligent control, interface quantity, the type of sensor are often item
When to increasing number of sensors, hardware is often redesigned through what is determined with regard to oneself at the beginning of mesh design, alternatively, increase pair
The interface module answered, the flexibility that will lead to equipment in this way reduce, and with high costs.
Moreover, since current multiple sensor applications power supply is all same power supply, causing biography in terms of electrical connection
Sensor poor anti jamming capability, cannot be the non-equipotential environmental applications the problems such as.
[summary of the invention]
The main object of the present invention, which is to provide, a kind of can not only make each sensor module independently-powered but also real
The modular sensor circuit of any combination of all kinds of individual sensors is showed.
In order to realize above-mentioned main purpose, a kind of modular sensor circuit provided by the invention include voltage regulator circuit,
Power isolation module, power supply circuit, sensor device probe, sensor combinations module and control chip, control chip and sensing
Analog-digital converter is connected between device probe, power supply circuit is voltage regulator circuit out-put supply signal, after voltage regulator circuit exports pressure stabilizing
Power supply signal to power isolation module, power isolation module export respectively the power supply signal after electrical isolation to control chip,
Sensor combinations module；Sensor combinations module includes at least two sensor modules, the output end at the end PC and first sensing
The input terminal of device module connects, and the output end of first sensor module is electrically connected with the input terminal of second sensor module,
The output of second sensor module terminates to the input terminal at the end PC.
It can be seen that modular sensor circuit provided by the invention can by multiple sensor die block I/O interfaces it
Between series connection, to realize that sensor module combines, i.e. the output at the end PC terminates to the input terminal of first sensor module, first
The output of a sensor module terminates to the input terminal of second sensor module, and so on, multiple sensings can be connect all the way
Device module, the output of the last one sensor module terminate to the input terminal at the end PC, ultimately form a loop, realize each
Any combination of class individual sensor.
Moreover, the self-powered isolator of each sensor module can be made to visit to sensor by power isolation module
Head power supply, the A/D end of convert and feeder ear and communication ends electrical isolation of sensor module, anti-interference ability is high, sensor probe
It can be in the environmental applications of certain potential difference.
Further embodiment is that power supply circuit includes voltage input end, voltage output end, communication interface chip, and communication connects
First end, the second end of mouthful chip are electrically connected with voltage input end respectively, the third end of communication interface chip, the 4th end respectively with
Voltage output end electrical connection is also connected with isolating chip between communication interface chip and control chip.
As it can be seen that each sensor module is serially connected by data line I/O interface, using general communication interface chip,
Sensor module data are read using general instruction mode, do not limit specific location of the sensor module in series connection, it can be with
It connects multiple modules, realizes any combination of all kinds of individual sensors.
In addition, isolating chip is connected between communication interface chip and control chip, isolating chip is for coldly, thermally counting
It is transmitted according to isolation.
Further embodiment is that voltage regulator circuit includes the first power supply chip, first diode, the second diode, output filter
Wave circuit, the first end of the first power supply chip are electrically connected with the cathode of first diode, the second end of the first power supply chip and the
The cathode of two diodes is electrically connected, and the third end of the first power supply chip is also connected with power indicating circuit, the first power supply chip
The first inductance is also connected between 4th end and output filter circuit.
Further scheme is, power indicating circuit includes first resistor, the first light emitting diode, first resistor and the
The series connection of one light emitting diode.
As it can be seen that first diode is anti-reverse diode, input power can be prevented to be reversely connected and burn circuit, the two or two pole
Pipe is freewheeling diode, can play the role of afterflow in circuit, the pressure drop electricity of the light emitting diode in power indicating circuit
Pressure while the enabled foot for supplying the first power supply chip, so that the burning voltage of output supplies other circuit modules.
Further embodiment is that power isolation module includes second source chip, isolating transformer, sample circuit, first
The both ends of voltage reference chip, isolating transformer primary coil are electrically connected with the both ends of second source chip, isolating transformer
The first end of grade coil is electrically connected with sample circuit, the second end of isolating transformer secondary coil and first voltage fiducial chip it
Between be connected with third diode.
Further scheme is to be also connected with first between the first end and sample circuit of isolating transformer secondary coil
Resistance, first capacitor.
Further scheme is that sample circuit includes photoelectrical coupler, second voltage fiducial chip, photoelectrical coupler
Input terminal is electrically connected with second voltage fiducial chip, and the output of photoelectrical coupler terminates positive pole.
It as it can be seen that module for power supply uses the direct current wide range input voltage of 5V to 24V, can adapt to various application environments, lead to
Power isolation module is crossed, the voltage of output is 5V, for analog-digital converter, controls chip, has source crystal oscillator and 2.5V power reference core
Piece power supply.Keep each sensor independently-powered, anti-interference ability is high, can be in the environmental applications of certain potential difference.
One Preferable scheme is that, modular sensor circuit further includes state indicator module, control chip output state
Indication signal is to state indicator module.
Further embodiment is, state indicator module includes current limliting exclusion and light emitting diode group, current limliting exclusion and hair
The electrical connection of optical diode group.
Further scheme is, light emitting diode group includes the second light emitting diode, third light emitting diode and the
Four light emitting diodes, the second light emitting diode is for issuing the first instruction optical signal, and third light emitting diode is for issuing second
Indicate optical signal, the 4th light emitting diode is for issuing third instruction optical signal.
As it can be seen that current limliting exclusion is exactly the identical resistance of several parameters, their pin is all connected to together, is made
For common pin, remaining pin is normally drawn, and exclusion has that directionality, neat, take up space few advantage.In addition, luminous two
Pole pipe group is used as data transmit-receive instruction, A/D conversion instruction, status fault instruction etc..
[Detailed description of the invention]
Fig. 1 is a kind of schematic diagram of modular sensor circuit embodiments of the present invention.
Fig. 2 is the circuit diagram of power supply module in a kind of modular sensor circuit embodiments of the present invention.
Fig. 3 is the circuit diagram of voltage regulator circuit in a kind of modular sensor circuit embodiments of the present invention.
Fig. 4 is the circuit diagram of power isolation module in a kind of modular sensor circuit embodiments of the present invention.
Fig. 5 is the circuit diagram of state indicator module in a kind of modular sensor circuit embodiments of the present invention.
[specific embodiment]
In order to which the objects, technical solutions and advantages of invention are more clearly understood, with reference to the accompanying drawings and embodiments, to this
Invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, not
It limits the use of in the present invention.
Referring to Fig. 1, a kind of modular sensor circuit of the invention includes voltage regulator circuit 10, power isolation module 20, supplies
Circuit 30, sensor probe 80, sensor combinations module 40 and control chip 50, control chip 50 and sensor probe 80
Between be connected with analog-digital converter 70, power supply circuit 30 is 10 out-put supply signal of voltage regulator circuit, and voltage regulator circuit 10 exports pressure stabilizing
For power supply signal afterwards to power isolation module 20, power isolation module 20 exports the power supply signal extremely control after electrical isolation respectively
Chip 50, sensor combinations module 40.
Referring to fig. 2, power supply circuit includes voltage input end JP1, voltage output end JP2, communication interface chip U3, input limit
Leakage resistance R1, input current-limiting resistance R2, output current limiting resistance R6 and output current limiting resistance R7, the first of communication interface chip U3
End, second end are electrically connected with voltage input end JP1 respectively, and third end, the 4th end of communication interface chip U3 is defeated with voltage respectively
Outlet JP2 electrical connection.As it can be seen that resistance R1, resistance R2, resistance R6 and resistance R7 are used to protect communication interface chip U3, to limit
The size of branch current where system burns out the concatenated communication interface chip U3 of institute to prevent electric current is excessive.So each sensor die
Block is serially connected by data line I/O interface, using general communication interface chip U3, is read and is passed using general instruction mode
Sensor module data do not limit specific location of the sensor module in series connection, and can connect multiple modules, realize of all categories
Any combination of sensor.Preferably, communication interface chip U3 is RS422 interface chip.
In addition, being also connected with isolating chip U5, digital isolating chip U5 between communication interface chip U3 and control chip 50
It is connected between communication interface chip U3 and control chip 50.Wherein, isolating chip U5 is for coldly, thermally data isolation to pass
It is defeated.
Referring to Fig. 3, voltage regulator circuit 10 include the first power supply chip U4, diode D2, diode D1, filter capacitor C1, from
Lift capacitor C2, resistance R8, resistance R9 and output filter circuit, the first end of the first power supply chip U4 and the cathode of diode D2
Electrical connection, the second end of the first power supply chip U4 is electrically connected with the cathode of diode D1, the 4th end of the first power supply chip U4 and
It is also connected between output filter circuit and deposits energy inductance L1, resistance R8 connects with resistance R9.Wherein, output filter circuit includes electricity
Hold C6, capacitor C7 and capacitor C13, diode D2 be anti-reverse diode, input power can be prevented to be reversely connected and burn circuit,
Diode D1 is freewheeling diode, can play the role of afterflow in circuit.So voltage regulator circuit 10 exports burning voltage and supplies
Other circuit modules are given, for example, voltage regulator circuit 10 can export 3.3 volts of burning voltage supplies communication interface chip U3, isolated core
Piece U5 and power isolation module 20.
In the present embodiment, the third end of the first power supply chip U4 is also connected with power indicating circuit, power indicating circuit
Including resistance R5, light emitting diode D5, resistance R5 connects with light emitting diode D5.Light emitting diode D5 in power indicating circuit
Pressure drop voltage simultaneously supply the first power supply chip U4 enabled foot.
Referring to fig. 4, power isolation module 20 includes cold ground end part and thermally end part, and power isolation module 20 is by second
Power supply chip U9, isolating transformer T1, sample circuit, first voltage fiducial chip U2 composition, isolating transformer T1 primary coil
Both ends be electrically connected with the both ends of second source chip U9, the first end of isolating transformer T1 secondary coil is electrically connected with sample circuit
It connects, is connected with diode D3 between the second end and first voltage fiducial chip U2 of isolating transformer T1 secondary coil.As it can be seen that mould
Block power supply uses the direct current wide range input voltage of 5V to 24V, can adapt to various application environments, passes through power isolation module
20, the voltage of output is 5V, can be analog-digital converter U6, control chip 50, have source crystal oscillator and 2.5V the first power reference core
Piece U2 power supply.Keep each sensor independently-powered, anti-interference ability is high, can be in the environmental applications of certain potential difference.
Wherein, power isolation module 20 further includes output filter capacitor C9, capacitor C10, capacitor C14 and a reference source filter
Wave capacitor C11, capacitor C15, be also connected between the first end and sample circuit of isolating transformer T1 secondary coil resistance R11,
Capacitor C2, resistance R11 are EMC absorption resistance.
Sample circuit includes photoelectrical coupler U7, second voltage fiducial chip U8, the input terminal of photoelectrical coupler U7 and
The output of two voltage reference chip U8 electrical connection, photoelectrical coupler U7 terminates positive pole.Wherein, sample circuit further includes resistance
R14, resistance R15, resistance R5, resistance R3, resistance R13 and capacitor C3.
Sensor combinations module 40 includes at least two sensor modules, the output end at the end PC 90 and first sensor die
The input terminal of block connects, and the output end of first sensor module is electrically connected with the input terminal of second sensor module, and second
The output of a sensor module terminates to the input terminal at the end PC 90.Certainly, sensor module can be one, be also possible to multiple
Combination.
Specifically, each sensor module is serially connected by data line I/O interface, to realize the combination of sensor module
It uses, i.e. the output at the end PC 90 terminates to the input terminal of first sensor module, the output termination of first sensor module
Output to the input terminal of second sensor module, second sensor module terminates to the input terminal of next sensor,
The rest may be inferred, can at most connect multiple sensor modules all the way, and the output of the last one sensor terminates to the input terminal at the end PC 90,
Which forms a loops.Wherein, the quantity for the most sensor modules that can be connect in the present embodiment is 255.
In terms of module for power supply, using the direct current wide range input voltage of 5V to 24V, it can adapt to various application environments,
The power consumption of each sensor module is generally 0.2 watt, and maximum is no more than 0.5 watt, built-in power isolation module 20, sensor module
A/D end of convert and feeder ear and communication ends electrical isolation.
In module communication aspects, firstly, the end PC 90 sends guidance code (start-up parameter), first sensor module receives and draws
After leading code, start to send numeric data code toward second sensor module, numeric data code includes the categories of sensors of this module, sensor volume
Number " 1 " and sensor actual measurement analog data (temperature, pressure etc.), transmit it is complete after the forwarding end PC 90 guidance code.Then,
After second sensor module receives numeric data code transmitted by first sensor module, transparent transmission (transparent transmission) first first
The data of sensor module receive always etc. the data that itself is retransmited after guidance code, send it is complete after the forwarding end PC 90
Guidance code, and so on, until the end PC 90 receives the guidance code that this mutually sends, at this point, reading data is completed.
In terms of module sequence, it is any that user sets which same category of sensor on 90 software of the end PC
Data, at this moment, the end PC 90 will automaticdata grouping, without require sensor it is different classes of between sequence, it is only necessary to seek phase
With the sequence between categories of sensors.Such as: a machinery equipment will be used to 5 temperature sensors, this 5 temperature sensors
Serial number from T1 to T5, it is only necessary to the position T1 is before the position T2, i.e. T1 > T2 > T3 > T4 > T5, woth no need to each sensing
Device is close to, and can be placed on before the sensor of other classifications or is placed on behind, possibly even be placed on centre.When
So, for extra similar individual sensor, then the end PC 90 is not made to comprehend, as temperature sensor have 6 (T1 to T6), then system only
The data of T1 to T5 sensor are handled, the data of sensor T6 then abandon.
Preferably, referring to Fig. 5, modular sensor circuit further includes state indicator module 60, and control chip 50 exports shape
State indication signal is to state indicator module 60.State indicator module 60 includes current limliting exclusion R12 and light emitting diode group, current limliting
Exclusion R12 is electrically connected with light emitting diode group.Wherein, light emitting diode group include light emitting diode D6, light emitting diode D7 with
And light emitting diode D8, light emitting diode D6 refer to for issuing the first instruction optical signal, light emitting diode D7 for issuing second
Show optical signal, light emitting diode D8 is for issuing third instruction optical signal.As it can be seen that current limliting exclusion R12 is exactly that several parameters are complete
Exactly the same resistance, their pin is all connected to together, and as common pin, remaining pin is normally drawn, and exclusion has
Directionality, neat, take up space few advantage.In addition, light emitting diode group is used as data transmit-receive instruction, A/D conversion instruction, shape
State indicating fault etc..
So modular sensor circuit provided by the invention can be by between multiple sensor die block I/O interfaces
Series connection, to realize that sensor module combines, i.e. the output at the end PC 90 terminates to the input terminal of first sensor module, and first
The output of sensor module terminates to the input terminal of second sensor module, and so on, multiple sensors can be connect all the way
Module, the output of the last one sensor module terminate to the input terminal at the end PC 90, ultimately form a loop, realize each
Any combination of class individual sensor.
Moreover, the self-powered isolator of each sensor module can be made to sensor by power isolation module 20
Probe power supply, the A/D end of convert and feeder ear and communication ends electrical isolation of sensor module, anti-interference ability is high, and sensor is visited
Head can be in the environmental applications of certain potential difference.
It should be noted that the above is only a preferred embodiment of the present invention, but the design concept invented is not limited thereto,
All insubstantial modifications made using this design to the present invention, are also fallen within the scope of protection of the present invention.
Claims (10)
1. a kind of modular sensor circuit characterized by comprising
Voltage regulator circuit, power isolation module, power supply circuit, sensor probe, sensor combinations module and control chip, it is described
Analog-digital converter is connected between control chip and the sensor probe, the power supply circuit is voltage regulator circuit output electricity
Source signal, the power supply signal after the voltage regulator circuit output pressure stabilizing to the power isolation module, divide by the power isolation module
Not Shu Chu power supply signal after electrical isolation to the control chip, the sensor combinations module；
The sensor combinations module includes at least two sensor modules, the output end at the end PC and first sensor die
The input terminal of block connects, and the output end of first sensor module and the input terminal of second sensor module are electrically connected
It connects, the output of second sensor module terminates to the input terminal at the end PC.
2. a kind of modular sensor circuit according to claim 1, it is characterised in that:
The power supply circuit includes voltage input end, voltage output end, communication interface chip, and the first of the communication interface chip
End, second end are electrically connected with the voltage input end respectively, the third end of the communication interface chip, the 4th end respectively with it is described
Voltage output end electrical connection, is also connected with isolating chip between the communication interface chip and the control chip.
3. a kind of modular sensor circuit according to claim 1, it is characterised in that:
The voltage regulator circuit include the first power supply chip, first diode, the second diode, output filter circuit, described first
The first end of power supply chip is electrically connected with the cathode of the first diode, the second end of first power supply chip and described the
The cathode of two diodes is electrically connected, and the third end of first power supply chip is also connected with power indicating circuit, first electricity
The first inductance is also connected between 4th end of source chip and the output filter circuit.
4. a kind of modular sensor circuit according to claim 3, it is characterised in that:
The power indicating circuit includes first resistor, the first light emitting diode, the first resistor and described first luminous two
Pole pipe series connection.
5. a kind of modular sensor circuit according to any one of claims 1 to 4, it is characterised in that:
The power isolation module includes second source chip, isolating transformer, sample circuit, first voltage fiducial chip, institute
The both ends for stating isolating transformer primary coil are electrically connected with the both ends of the second source chip, the isolating transformer secondary wire
The first end of circle is electrically connected with the sample circuit, the second end of the isolating transformer secondary coil and the first voltage base
Third diode is connected between quasi core piece.
6. a kind of modular sensor circuit according to claim 5, it is characterised in that:
First resistor, the first electricity are also connected between the first end and the sample circuit of the isolating transformer secondary coil
Hold.
7. a kind of modular sensor circuit according to claim 6, it is characterised in that:
The sample circuit include photoelectrical coupler, second voltage fiducial chip, the photoelectrical coupler input terminal with it is described
The output of the electrical connection of second voltage fiducial chip, the photoelectrical coupler terminates positive pole.
8. a kind of modular sensor circuit according to any one of claims 1 to 4, it is characterised in that:
The modular sensor circuit further includes state indicator module, and the control chip output state indication signal is to described
State indicator module.
9. a kind of modular sensor circuit according to claim 8, it is characterised in that:
The state indicator module includes current limliting exclusion and light emitting diode group, the current limliting exclusion and the light emitting diode
Group electrical connection.
10. a kind of modular sensor circuit according to claim 9, it is characterised in that:
The light emitting diode group includes the second light emitting diode, third light emitting diode and the 4th light emitting diode, described
Second light emitting diode is for issuing the first instruction optical signal, and the third light emitting diode is for issuing the second instruction light letter
Number, the 4th light emitting diode is for issuing third instruction optical signal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810879465.7A CN108981788B (en) | 2018-08-03 | 2018-08-03 | Modular sensor circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810879465.7A CN108981788B (en) | 2018-08-03 | 2018-08-03 | Modular sensor circuit |
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| CN108981788A true CN108981788A (en) | 2018-12-11 |
| CN108981788B CN108981788B (en) | 2021-02-02 |
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| CN109900367A (en) * | 2019-04-10 | 2019-06-18 | 重庆中科芯亿达电子有限公司 | A kind of anti-jamming signal processing chip |
| CN110596341A (en) * | 2019-06-28 | 2019-12-20 | 南京天补智联信息科技有限公司 | Integrated soil and surrounding environment detection system |
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| CN108981788B (en) | 2021-02-02 |
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