CN109085416A - A kind of digitized voltage sensor module - Google Patents
A kind of digitized voltage sensor module Download PDFInfo
- Publication number
- CN109085416A CN109085416A CN201810908173.1A CN201810908173A CN109085416A CN 109085416 A CN109085416 A CN 109085416A CN 201810908173 A CN201810908173 A CN 201810908173A CN 109085416 A CN109085416 A CN 109085416A
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- circuit
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- input terminal
- voltage sensor
- power supply
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
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- 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
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
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- General Physics & Mathematics (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
- Analogue/Digital Conversion (AREA)
Abstract
The invention discloses a kind of digitized voltage sensor modules, it is connected with control circuit, including power supply unit, analog circuit unit, digital circuit unit, the input terminal of power supply unit is connected with the power output end of control circuit, and the output end of power supply unit is connected for powering with analog circuit unit, digital circuit unit；Analog circuit unit includes voltage sensor, sample circuit, signal conditioning circuit, digital circuit unit includes A/D converter circuit, digital processing module, the output end of voltage sensor is connected with the input terminal of sample circuit, the output end of sample circuit is connected with the input terminal of signal conditioning circuit, the output end of signal conditioning circuit is connected with the input terminal of A/D converter circuit, the output end of A/D converter circuit is connected with the input terminal of digital processing module, and the output end of digital processing module is connected by communication module with control circuit.The present invention can simplified control circuit scale, it is easy to repair, be also avoided that interference of the analog signal to control circuit.
Description
Technical field
The present invention relates to voltage sensor fields, are specifically related to a kind of digitized voltage sensor module.
Background technique
Voltage sensor is analog signal output at present, and signal processing flow is to first pass through analog sampling and signal change
Output A/D converter circuit is changed, finally passes through FPGA digitized processing, control chip is then input to by data/address bus.It adopts at present
Sample, signal transformation, AD conversion process are all to need to realize that but the introducing of analog signal will increase to control in control circuit
The signal interference of circuit processed needs to increase at the same time, in control circuit and gives analog sampling and digitized processing two parts confessions
The power supply of electricity, also increases the complexity of its circuit.
Summary of the invention
In order to solve the above-mentioned technical problem, the object of the present invention is to provide a kind of simplified control circuit scale, reductions to control
The digitized voltage sensor module of circuit interference processed.
The technical solution adopted by the present invention is that:
A kind of digitized voltage sensor module, for connecting control circuit, comprising: power supply unit, analog circuit unit,
Digital circuit unit, the input terminal of the power supply unit are connected with the power output end of control circuit, the output end of power supply unit
It is connected with analog circuit unit, digital circuit unit respectively for powering；The analog circuit unit include voltage sensor,
Sample circuit, signal conditioning circuit, the digital circuit unit include A/D converter circuit, digital processing module, the voltage
The output end of sensor is connected with the input terminal of sample circuit, the input of the output end and signal conditioning circuit of the sample circuit
End is connected, and the output end of the signal conditioning circuit is connected with the input terminal of A/D converter circuit, the output of the A/D converter circuit
End is connected with the input terminal of digital processing module, and the output end of the digital processing module passes through communication module and control electricity
Road is connected.
Further, the digital processing module uses one of FPGA module or CPLD module.
Further, the communication module is 485 signal drive circuits, and 485 signal drive circuit passes through 485 buses
It is connected with 485 terminals of control circuit.
Further, the sample circuit includes operational amplifier U2A, TVS Transient Suppression Diode D1A, resistance R4, institute
Stating signal conditioning circuit includes operational amplifier U2B and several resistance；The output end and operational amplifier of the voltage sensor
The non-inverting input terminal of U2A is connected, and the resistance R4 is in parallel with TVS Transient Suppression Diode D1A, and resistance R4 and TVS transient state inhibit
A common end of diode D1A is connected with the non-inverting input terminal of operational amplifier U2A, and resistance R4 and TVS transient state inhibit two poles
The output end of another common end grounding of pipe D1A, the operational amplifier U2A passes through resistance R2's and operational amplifier U2B
Inverting input terminal is connected, and the output end of the operational amplifier U2B is connected with the signal input part of A/D converter circuit.
Further, the inverting input terminal of the operational amplifier U2A is connected with input terminal, the operational amplifier U2B
Non-inverting input terminal ground connection, the capacitor C5 being connected in parallel to each other is provided between the reverse input end and input terminal of operational amplifier U2B
With resistance R1.
Further, the power supply unit includes filter F1 and DC-DC isolated power supply module U3, the filter it is defeated
Enter end to be connected with the power output end of control circuit, the input terminal phase of the output end and DC-DC isolated power supply module U3 of filter
Even, the output end of the DC-DC isolated power supply module U3 is for exporting 15V voltage.
It further, further include voltage-stablizer U4, inductance L1 and L2, electricity is isolated with DC-DC for the input terminal of the voltage-stablizer U4
Source module U3 output end is connected, and the output end of voltage-stablizer U4 is for providing 5V analog power, the cathode output end of the voltage-stablizer
AVCC5 is connected with one end of inductance L1, and the ground terminal AGND of voltage-stablizer is connected with one end of inductance L2, the inductance L1's and L2
The other end is for providing 5V digital power.
Further, the capacitor C8 being mutually in parallel is provided between the electrode input end and negative input of the filter
And C9, be provided between the cathode output end and ground terminal of the DC-DC isolated power supply module U3 capacitor C6 being mutually in parallel and
The capacitor C10 and C11 being mutually in parallel are provided between the cathode output end and ground terminal of C7, DC-DC isolated power supply module U3.
Beneficial effects of the present invention:
1, the power supply unit for being provided with operating on low voltage voltage is integrated on the circuit board of voltage sensor module, can simplify
Control circuit scale keeps control circuit integrated level higher.
2, sensor module is handled, becomes an independent unit, repair and maintenance is more convenient.
3, analog signal processing link is placed on sensor processing circuit plate, reduces the interference to control circuit.
Detailed description of the invention
A specific embodiment of the invention is described further with reference to the accompanying drawing；
Fig. 1 is the schematic illustration of digitized voltage sensor module of the present invention；
Fig. 2 is the circuit diagram of analog circuit unit of the present invention and digital circuit unit；
Fig. 3 is the circuit diagram of power supply unit filter F1 and DC-DC isolated power supply module of the present invention；
The circuit diagram of the position Fig. 4 power supply unit voltage-stablizer U4 of the present invention；
Fig. 5 is the circuit diagram of digital power terminal of the present invention；
Fig. 6 a-6b is the schematic illustration of voltage transmission agreement.
Specific embodiment
As shown in Figure 1-Figure 3 it is a kind of digitized voltage sensor module of the invention, for connecting control circuit, wraps
Include: power supply unit 1, analog circuit unit 2, digital circuit unit 3, the input terminal of power supply unit 1 and the power supply of control circuit are defeated
Outlet is connected, and the output end of power supply unit 1 is connected respectively for powering with analog circuit unit 2, digital circuit unit 3；Mould
Quasi- circuit unit 2 includes voltage sensor 21, sample circuit 22, signal conditioning circuit 23, and digital circuit unit 3 includes AD conversion
The output end of circuit 31, digital processing module 32, voltage sensor 21 is connected with the input terminal of sample circuit 22, sample circuit
22 output end is connected with the input terminal of signal conditioning circuit 23, output end and the A/D converter circuit 31 of signal conditioning circuit 23
Input terminal is connected, and the output end of A/D converter circuit 31 is connected with the input terminal of digital processing module 32, digital processing module
32 output end is connected by communication module with control circuit.
Wherein, voltage sensor is using conventional voltage transformer, voltage transmitter.
Preferably, digital processing module 32 uses one of FPGA module or CPLD module, uses in the present embodiment
FPGA module.
As shown in Fig. 2, sample circuit 22 includes operational amplifier U2A, TVS Transient Suppression Diode D1A, resistance R4, letter
Number conditioning circuit 23 includes operational amplifier U2B and several resistance；The output end of voltage sensor 21 is with operational amplifier U2A's
Non-inverting input terminal is connected, and resistance R4 is in parallel with TVS Transient Suppression Diode D1A, resistance R4 and TVS Transient Suppression Diode D1A
A common end be connected with the non-inverting input terminal of operational amplifier U2A, resistance R4 and TVS Transient Suppression Diode D1A's is another
One common end grounding, the output end of operational amplifier U2A pass through the inverting input terminal phase of resistance R2 and operational amplifier U2B
Even, the output end of operational amplifier U2B is connected with the signal input part of A/D converter circuit 31.
Wherein, the inverting input terminal of operational amplifier U2A is connected with input terminal, the non-inverting input terminal of operational amplifier U2B
Ground connection, is provided with the capacitor C5 and resistance R1 being connected in parallel to each other between the reverse input end and input terminal of operational amplifier U2B.
As shown in figure 3, power supply unit 1 include filter F1 and DC-DC isolated power supply module U3, the input terminal of filter with
The power output end of control circuit is connected, and the output end of filter is connected with the input terminal of DC-DC isolated power supply module U3, DC-
The output end of DC isolated power supply module U3 is for exporting 15V voltage.It further include voltage-stablizer U4, inductance L1 and L2, voltage-stablizer U4's
Input terminal is connected with DC-DC isolated power supply module U3 output end, and the output end of voltage-stablizer U4 is for providing 5V analog power, pressure stabilizing
The cathode output end AVCC5 of device is connected with one end of inductance L1, and the ground terminal AGND of voltage-stablizer is connected with one end of inductance L2, electricity
The other end of sense L1 and L2 is for providing 5V digital power.
Wherein, the capacitor C8 and C9 being mutually in parallel, DC- are provided between the electrode input end and negative input of filter
The capacitor C6 and C7 being mutually in parallel, DC-DC isolation are provided between the cathode output end and ground terminal of DC isolated power supply module U3
The capacitor C10 and C11 being mutually in parallel are provided between the cathode output end and ground terminal of power module U3.
Preferably, communication module is that 485 signal drive circuit, 33,485 signal drive circuit 33 passes through 485 buses and control
485 terminals of circuit are connected, and voltage signal is sent to control circuit by 485 transport protocols.
For the anti-interference ability in improve data transfer efficiency and transmission process, it is preferred that pass through in the present embodiment
A kind of voltage transmission agreement transmits signal between voltage sensor module and control circuit, as shown in Figure 6 a, voltage transmission association
The data frame of view includes synchronization character and data word, and synchronization character and data word alternately transmit, and data word widths are 12, data word the
One is highest order, last position is lowest order；Synchronous word width is 13, and synchronization character last 1 is low level L, remaining position is
High-order H.
As shown in Figure 6 b, data word and synchronization character carry out position to state " H " and " L " with 75% and 25% duty ratio modulation
Coding.
Preferably, data frame is exported using 485 level in the present embodiment.Every paths Transmission bit rate is 1Mb/s, each logical
Road output is RS485 level, and signal is formed using difference form.
Wherein, when sending voltage data, the encoded radio of data word is 0-4095, and the every digital quantity 1 of encoded radio represents
0.09768V, with the voltage signal for corresponding to 0~400V, as shown in the table
By synchronization character and data word, alternately transmission alternately sends data frame, is passed by the way of gap, acceleration signal
Defeated agreement sends voltage signal, can simplify program, improve data transfer efficiency, improves the anti-interference ability in transmission process.
The present invention is provided with the power supply unit of operating on low voltage voltage, Ke Yijian by integrating on voltage sensor circuit plate
Change control circuit scale, keeps control circuit integrated level higher.Sensor module is handled, an independent list is become
Member, repair and maintenance are more convenient.And analog signal processing link is placed on sensor processing circuit plate, is reduced to control electricity
The interference on road.
The above description is only a preferred embodiment of the present invention, and the present invention is not limited to above embodiment, as long as with
Essentially identical means realize that the technical solution of the object of the invention belongs within protection scope of the present invention.
Claims (8)
1. a kind of digitized voltage sensor module, for connecting control circuit characterized by comprising power supply unit (1),
Analog circuit unit (2), digital circuit unit (3), the input terminal of the power supply unit (1) and the power output end of control circuit
It is connected, the output end of power supply unit (1) is connected respectively for powering with analog circuit unit (2), digital circuit unit (3)；
The analog circuit unit (2) includes voltage sensor (21), sample circuit (22), signal conditioning circuit (23), the number
Circuit unit (3) includes A/D converter circuit (31), digital processing module (32), the output end of the voltage sensor (21) with
The input terminal of sample circuit (22) is connected, the input terminal phase of the output end and signal conditioning circuit (23) of the sample circuit (22)
Even, the output end of the signal conditioning circuit (23) is connected with the input terminal of A/D converter circuit (31), the A/D converter circuit
(31) output end is connected with the input terminal of digital processing module (32), and the output end of the digital processing module (32) is logical
Communication module is crossed to be connected with control circuit.
2. digitized voltage sensor module according to claim 1, it is characterised in that: the digital processing module
(32) one of FPGA module or CPLD module are used.
3. digitized voltage sensor module according to claim 1, it is characterised in that: the communication module is 485 letters
Number driving circuit (33), 485 signal drive circuit (33) are connected by 485 buses with 485 terminals of control circuit.
4. digitized voltage sensor module according to claim 1, it is characterised in that: the sample circuit (22) includes
Operational amplifier U2A, TVS Transient Suppression Diode D1A, resistance R4, the signal conditioning circuit (23) includes operational amplifier
U2B and several resistance；The input terminal of the voltage sensor (21) is connected by divider resistance with end to be measured, voltage sensor
(21) output end is connected with the non-inverting input terminal of operational amplifier U2A, the resistance R4 and TVS Transient Suppression Diode D1A
Parallel connection, resistance R4 are connected with a common end of TVS Transient Suppression Diode D1A with the non-inverting input terminal of operational amplifier U2A,
The output end of another common end grounding of resistance R4 and TVS Transient Suppression Diode D1A, the operational amplifier U2A passes through
Resistance R2 is connected with the inverting input terminal of operational amplifier U2B, the output end and A/D converter circuit of the operational amplifier U2B
(31) signal input part is connected.
5. digitized voltage sensor module according to claim 4, it is characterised in that: the operational amplifier U2A's
Inverting input terminal is connected with input terminal, and the non-inverting input terminal ground connection of the operational amplifier U2B, operational amplifier U2B's is reversed
The capacitor C5 and resistance R1 being connected in parallel to each other are provided between input terminal and input terminal.
6. digitized voltage sensor module according to claim 1, it is characterised in that: the power supply unit (1) includes
Filter F1 and DC-DC isolated power supply module U3, the input terminal of the filter are connected with the power output end of control circuit, filter
The output end of wave device is connected with the input terminal of DC-DC isolated power supply module U3, the output end of the DC-DC isolated power supply module U3
For exporting 15V voltage.
7. digitized voltage sensor module according to claim 6, it is characterised in that: further include voltage-stablizer U4, inductance
The input terminal of L1 and L2, the voltage-stablizer U4 are connected with DC-DC isolated power supply module U3 output end, and the output end of voltage-stablizer U4 is used
In providing 5V analog power, the cathode output end AVCC5 of the voltage-stablizer is connected with one end of inductance L1, the ground terminal of voltage-stablizer
AGND is connected with one end of inductance L2, and the other end of the inductance L1 and L2 is for providing 5V digital power.
8. digitized voltage sensor module according to claim 6, it is characterised in that: the anode input of the filter
The capacitor C8 and C9 being mutually in parallel are provided between end and negative input, the anode of the DC-DC isolated power supply module U3 is defeated
Be provided with the capacitor C6 and C7 being mutually in parallel between outlet and ground terminal, the cathode output end of DC-DC isolated power supply module U3 with
The capacitor C10 and C11 being mutually in parallel are provided between ground terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810908173.1A CN109085416B (en) | 2018-08-10 | 2018-08-10 | Digital voltage sensor module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810908173.1A CN109085416B (en) | 2018-08-10 | 2018-08-10 | Digital voltage sensor module |
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| Publication Number | Publication Date |
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| CN109085416A true CN109085416A (en) | 2018-12-25 |
| CN109085416B CN109085416B (en) | 2023-08-01 |
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| CN201810908173.1A Active CN109085416B (en) | 2018-08-10 | 2018-08-10 | Digital voltage sensor module |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110441558A (en) * | 2019-09-17 | 2019-11-12 | 贵州电网有限责任公司 | It is a kind of to realize common-battery source and electronic mutual inductor acquisition device altogether |
| CN110763908A (en) * | 2019-11-11 | 2020-02-07 | 绵阳市维博电子有限责任公司 | Digital display DC meter |
| CN116614134A (en) * | 2023-07-17 | 2023-08-18 | 吉林省百皓科技有限公司 | Chlorine dioxide gas sensor hybrid integrated circuit |
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