CN206378226U - Pressure detector - Google Patents
Pressure detector Download PDFInfo
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- CN206378226U CN206378226U CN201621478217.4U CN201621478217U CN206378226U CN 206378226 U CN206378226 U CN 206378226U CN 201621478217 U CN201621478217 U CN 201621478217U CN 206378226 U CN206378226 U CN 206378226U
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Abstract
The utility model discloses pressure detector.Conventional cursor formula pressure gauge detection error is big, and artificial read further causes error.The utility model includes battery pack, power supply module, electric power detection module, signal processing module and single-chip microcomputer；Battery pack by two section series connection 1.5V dry cell batteries into；The voltage voltage stabilizing of battery pack to 3.3V is that single-chip microcomputer and signal processing module are powered by voltage stabilizing chip by power supply module；The output voltage values of electric power detection module detection battery pack are simultaneously transferred to single-chip microcomputer, draw the dump energy of battery pack；Pressure sensor in signal processing module produces corresponding voltage signal according to the pressure size being subject to, single-chip microcomputer is transferred to after the voltage signal amplification that signal processing module is produced pressure sensor by reference voltage chip, amplifier and instrument amplifier, single-chip microcomputer shows the pressure value detected on a display screen.Automatic detection pressure value after the utility model is powered, and with the function of detection battery dump energy.
Description
Technical field
The utility model belongs to technical field of pressure detection, and in particular to a kind of pressure detecting for being used to detect pressure size
Device.
Background technology
With the development of industrial technology, high-precision metering system is increasingly by the need for people.Due to conventional cursor
Formula pressure gauge detection error is big, and artificial read further causes error.In addition, conventional cursor formula pressure gauge volume is larger,
Carry inconvenience and price is higher.Pressure-detecting device therefore, it is possible to accurate detection pressure value receives an acclaim all the more.
The content of the invention
The purpose of this utility model, which is that offer is a kind of, can accurately detect the pressure detector of pressure value.
The utility model includes battery pack, power supply module, electric power detection module, signal processing module and single-chip microcomputer.It is described
Battery pack by two section series connection 1.5V dry cell batteries into；Described power supply module is steady by the voltage of battery pack by voltage stabilizing chip
It is that single-chip microcomputer and signal processing module are powered to be pressed onto 3.3V.The output voltage values of described electric power detection module detection battery pack are simultaneously
Single-chip microcomputer is transferred to, the dump energy of battery pack is drawn.
Described signal processing module includes pressure sensor, reference voltage chip, precision amplifier and instrument amplifier；
Described pressure sensor is diffusion silicon pressure sensor；Described reference voltage chip is using REF3325AIDBZR benchmark electricity
Press chip；Described precision amplifier uses OPA333AIDBVR amplifiers；Described instrument amplifier uses INA333A instrument
Amplifier.1 pin of reference voltage chip connects electric capacity C1 one end and the output end of power supply module；Electric capacity C1 another termination
Ground；The 3 pins ground connection of reference voltage chip；2 pins of reference voltage chip connect the VREF pins of single-chip microcomputer, precision amplifier
One end of 3 pins and electric capacity C2；Electric capacity C2 other end ground connection.1 pin of precision amplifier connects the positive voltage of pressure sensor
Input；The 2 pins ground connection of precision amplifier；4 pins of precision amplifier connect first resistor R1 one end and pressure sensor
Negative voltage input；First resistor R1 other end ground connection；5 pins of precision amplifier connect the output end of power supply module.Instrument
1 pin of table amplifier is connected by 3rd resistor R3 with 8 pins of instrument amplifier.2 pins of instrument amplifier connect pressure
The voltage differential signal negative terminal of sensor；3 pins of instrument amplifier connect the voltage differential signal anode of pressure sensor；Instrument is amplified
4 pins and 5 pins of device are grounded.6 pins of instrument amplifier connect second resistance R2 one end；The second resistance R2 other end
Connect electric capacity C7 one end and the first I/O mouthfuls of single-chip microcomputer, single-chip microcomputer the first I/O mouthfuls there is A/D translation functions；Electric capacity C7's is another
One end is grounded.7 pins of instrument amplifier connect the output end of power supply module.
Described pressure sensor uses DP10 pressure sensors.
Described power supply module includes voltage stabilizing chip U3, and described voltage stabilizing chip uses HT7733 voltage stabilizing chips；Voltage stabilizing core
3 pins of piece connect diode D1 positive pole and inductance L1 one end；Inductance L1 another termination capacitor C5, electric capacity C6 one end and
The positive pole of battery pack；Electric capacity C5 and electric capacity the C6 other end are grounded.2 pins of voltage stabilizing chip meet electric capacity C3, the one of electric capacity C4
End and diode D1 negative pole.Electric capacity C3 and electric capacity the C4 other end are grounded.The 1 pin ground connection of voltage stabilizing chip.Voltage stabilizing chip
2 pins be power supply module output end.
Described single-chip microcomputer uses STM8L052R8T6 single-chip microcomputers；VDD1, VDD2, VDD3, VDDA of described single-chip microcomputer
And VLCD pins connect the output end of power supply module.VSS1, VSS2, VSS3 and VSSA pin of single-chip microcomputer are grounded.
Described electric power detection module includes triode Q1；Described triode Q1 base stage meets the 6th resistance R6 and the 7th
Resistance R7 one end；The 6th resistance R6 other end connects the 2nd I/O mouthfuls of single-chip microcomputer；7th resistance R7 other end ground connection；Three
Pole pipe Q1 grounded emitter；Triode Q1 colelctor electrode connects the 5th resistance R5 one end；5th resistance R5 another termination
Four resistance R4 one end and the 3rd of single-chip microcomputer the I/O mouthfuls, single-chip microcomputer the 3rd I/O mouthfuls there is A/D translation functions；4th resistance R4
Another termination battery pack positive pole.
The utility model has an advantageous effect in that：
1st, the utility model is simple to operate, automatic detection pressure value after energization.
2nd, the utility model can detect battery dump energy.
Brief description of the drawings
Fig. 1 is system block diagram of the present utility model；
Fig. 2 is the circuit theory diagrams of power supply module in the utility model；
Fig. 3 is the circuit theory diagrams of single-chip microcomputer in the utility model；
Fig. 4 is the circuit theory diagrams of electric power detection module in the utility model；
Fig. 5 is the circuit theory diagrams of signal processing module in the utility model.
Embodiment
The utility model is described in further detail below in conjunction with the accompanying drawings.
As shown in figure 1, pressure detector, including battery pack, power supply module 101, electric power detection module 102, signal transacting
Module 103 and single-chip microcomputer 104.Battery pack by two section series connection 1.5V dry cell batteries into；Power supply module 101 will by voltage stabilizing chip
The voltage voltage stabilizing of battery pack is that single-chip microcomputer 104 and signal processing module 103 are powered to 3.3V.Electric power detection module 102 detects electricity
The output voltage values of pond group are simultaneously transferred to single-chip microcomputer 104, draw the dump energy of battery pack.Pressure in signal processing module 103
Force snesor produces corresponding voltage signal according to the pressure size that is subject to, signal processing module 103 by reference voltage chip,
The voltage signal that amplifier and instrument amplifier produce pressure sensor is transferred to single-chip microcomputer 104 after amplifying, single-chip microcomputer 104 will
The pressure value detected is shown on a display screen.
As shown in Fig. 2 power supply module 101 includes voltage stabilizing chip U3, voltage stabilizing chip U3 uses HT7733 voltage stabilizing chips；Voltage stabilizing
Chip U3 3 pins connect diode D1 positive pole and inductance L1 one end；Inductance L1 another termination capacitor C5, the one of electric capacity C6
End and the positive pole BAT of battery pack；Electric capacity C5 and electric capacity the C6 other end are grounded.Voltage stabilizing chip U3 2 pins connect electric capacity C3, electricity
Hold C4 one end and diode D1 negative pole.Electric capacity C3 and electric capacity the C4 other end are grounded.Voltage stabilizing chip U3 1 pin connects
Ground.Voltage stabilizing chip U3 2 pins are the output end VCC of power supply module 101.
As shown in figure 3, single-chip microcomputer 104 uses STM8L052R8T6 single-chip microcomputers；The VDD1 of single-chip microcomputer 104, VDD2, VDD3,
VDDA and VLCD pins meet the output end VCC of power supply module 101.VSS1, VSS2, VSS3 and VSSA pin of single-chip microcomputer 104
It is grounded.
As shown in figure 4, electric power detection module 102 includes triode Q1；Triode Q1 base stage meets the 6th resistance R6 and
Seven resistance R7 one end；The 6th resistance R6 other end connects the EL-ctrl pins of single-chip microcomputer 104；The 7th resistance R7 other end
Ground connection；Triode Q1 grounded emitter；Triode Q1 colelctor electrode connects the 5th resistance R5 one end；5th resistance R5's is another
Terminate the 4th resistance R4 one end and the ELAD pins of single-chip microcomputer 104；The positive pole of 4th resistance R4 another termination battery pack
BAT。
As shown in figure 5, signal processing module 103 includes pressure sensor P1, reference voltage chip U1, precision amplifier U2
With instrument amplifier U4；Pressure sensor P1 uses DP10 pressure sensors；Reference voltage chip U1 uses REF3325AIDBZR
Reference voltage chip；Precision amplifier U2 uses OPA333AIDBVR amplifiers；Instrument amplifier U4 is put using INA333A instrument
Big device.Reference voltage chip U1 1 pin meets electric capacity C1 one end and the output end VCC of power supply module 101；Electric capacity C1's is another
End ground connection；Reference voltage chip U1 3 pins ground connection；Reference voltage chip U1 2 pins connect single-chip microcomputer 104 VREF pins,
Precision amplifier U2 3 pins and electric capacity C2 one end；Electric capacity C2 other end ground connection.Precision amplifier U2 1 pin connects pressure
Force snesor P1 positive voltage input V+；Precision amplifier U2 2 pins ground connection；Precision amplifier U2 4 pins connect first
Resistance R1 one end and pressure sensor P1 negative voltage input V-；First resistor R1 other end ground connection；Precision amplifier
U2 5 pins meet the output end VCC of power supply module 101.Instrument amplifier U4 1 pin amplifies by 3rd resistor R3 with instrument
Device U4 8 pins are connected.Instrument amplifier U4 2 pins meet pressure sensor P1 voltage differential signal negative terminal S-；Instrument is amplified
Device U4 3 pins meet pressure sensor P1 voltage differential signal anode S+；Instrument amplifier U4 4 pins and 5 pins are grounded.
Instrument amplifier U4 6 pins connect second resistance R2 one end；Second resistance R2 another termination capacitor C7 one end and monolithic
The AD-pressure pins of machine 104；Electric capacity C7 other end ground connection.Instrument amplifier U4 7 pins connect power supply module 101
Output end VCC.
Operation principle of the present utility model is as follows：
The principle of power supply module 101 is as follows：
Voltage stabilizing chip U3, inductance L1 and diode D1 composition Boost circuits, the voltage voltage stabilizing that battery pack is provided to 3.3V
Output.
The principle of electric power detection module 102 is as follows：
When the EL-ctrl pins of single-chip microcomputer 104 export high level, triode Q1 conductings, the positive pole BAT of battery pack electricity
Pressure, will by way of the 4th resistance R4 and the 5th resistance R5 partial pressuresLie prostrate the ELAD pipes of control source single-chip microcomputer 104
Pin carries out A/D conversions.In formula, VBATFor the positive pole BAT of battery pack magnitude of voltage, R4For the 4th resistance R4 resistance, R5For the 5th
Resistance R5 resistance.
When the EL-ctrl pipes of single-chip microcomputer 104 export low level, triode Q1 is closed, the ELAD pins of single-chip microcomputer 104
Voltage is the positive pole BAT of battery pack voltage.
The principle of signal processing module 103 is as follows：
Reference voltage chip U1 is managed 2 of voltage chips U1 on the basis of the output end VCC of power supply module 101 photovoltaic conversion
The magnitude of voltage of pin, the magnitude of voltage of reference voltage chip U1 2 pins is used as the reference voltage of single-chip microcomputer 104, reference voltage chip
U1 2 pins are connected with precision amplifier U2 3 pins, and precision amplifier U2 4 pins produce one and reference voltage chip
The equal voltage of the voltage swings of U2 2 pins.The voltage makes the upper overcurrent of first resistor R1.
When there is pressure to act on pressure sensor P1, pressure sensor P1 can produce a magnitude of voltage；Pressure sensing
The magnitude of voltage that device P1 is produced is output to the AD-pressure pins of single-chip microcomputer 104 after amplifying through instrument amplifier U4.
Instrument amplifier U4 is output to the magnitude of voltage V of the AD-pressure pins of single-chip microcomputer 1041For
Wherein VsThe magnitude of voltage produced for pressure sensor P1, R3For 3rd resistor R3 resistance.
Claims (5)
1. pressure detector, including battery pack, power supply module, electric power detection module, signal processing module and single-chip microcomputer；Its feature
It is：Described battery pack by two section series connection 1.5V dry cell batteries into；Described power supply module is by voltage stabilizing chip by battery
The voltage voltage stabilizing of group is that single-chip microcomputer and signal processing module are powered to 3.3V；Described electric power detection module detects the defeated of battery pack
Go out magnitude of voltage and be transferred to single-chip microcomputer, draw the dump energy of battery pack；Described signal processing module include pressure sensor,
Reference voltage chip, precision amplifier and instrument amplifier；Described pressure sensor is diffusion silicon pressure sensor；Described
Reference voltage chip uses REF3325AIDBZR reference voltage chips；Described precision amplifier is put using OPA333AIDBVR
Big device；Described instrument amplifier uses INA333A instrument amplifiers；1 pin of reference voltage chip connects electric capacity C1 one end
And the output end of power supply module；Electric capacity C1 other end ground connection；The 3 pins ground connection of reference voltage chip；The 2 of reference voltage chip
Pin connects one end of the VREF pins of single-chip microcomputer, 3 pins of precision amplifier and electric capacity C2；Electric capacity C2 other end ground connection；Essence
1 pin of close amplifier connects the positive voltage input of pressure sensor；The 2 pins ground connection of precision amplifier；The 4 of precision amplifier
Pin connects first resistor R1 one end and the negative voltage input of pressure sensor；First resistor R1 other end ground connection；It is accurate
5 pins of amplifier connect the output end of power supply module；1 pin of instrument amplifier is by 3rd resistor R3 and instrument amplifier
8 pins are connected；2 pins of instrument amplifier connect the voltage differential signal negative terminal of pressure sensor；3 pins of instrument amplifier connect pressure
The voltage differential signal anode of force snesor；4 pins and 5 pins of instrument amplifier are grounded；6 pins of instrument amplifier connect
Two resistance R2 one end；Second resistance R2 another termination capacitor C7 one end and the first of single-chip microcomputer the I/O mouthfuls, the of single-chip microcomputer
One I/O mouthfuls has A/D translation functions；Electric capacity C7 other end ground connection；7 pins of instrument amplifier connect the output of power supply module
End.
2. pressure detector according to claim 1, it is characterised in that：Described pressure sensor is passed using DP10 pressure
Sensor.
3. pressure detector according to claim 1, it is characterised in that：Described power supply module includes voltage stabilizing chip U3,
Described voltage stabilizing chip uses HT7733 voltage stabilizing chips；3 pins of voltage stabilizing chip connect diode D1 positive pole and inductance L1 one
End；Inductance L1 another termination capacitor C5, electric capacity C6 one end and battery pack positive pole；Electric capacity C5 and electric capacity the C6 other end are equal
Ground connection；2 pins of voltage stabilizing chip connect electric capacity C3, electric capacity C4 one end and diode D1 negative pole；Electric capacity C3's and electric capacity C4 is another
One end is grounded；The 1 pin ground connection of voltage stabilizing chip；2 pins of voltage stabilizing chip are the output end of power supply module.
4. pressure detector according to claim 1, it is characterised in that：Described single-chip microcomputer is mono- using STM8L052R8T6
Piece machine；VDD1, VDD2, VDD3, VDDA and VLCD pin of described single-chip microcomputer connect the output end of power supply module；Single-chip microcomputer
VSS1, VSS2, VSS3 and VSSA pin are grounded.
5. pressure detector according to claim 1, it is characterised in that：Described electric power detection module includes triode
Q1；Described triode Q1 base stage connects the 6th resistance R6 and the 7th resistance R7 one end；6th resistance R6 other end order
The 2nd I/O mouthfuls of piece machine；7th resistance R7 other end ground connection；Triode Q1 grounded emitter；Triode Q1 colelctor electrode
Connect the 5th resistance R5 one end；The 5th resistance R5 resistance R4 of another termination the 4th one end and the 3rd of single-chip microcomputer the I/O mouthfuls, it is single
Piece machine the 3rd I/O mouthfuls have A/D translation functions；The positive pole of 4th resistance R4 another termination battery pack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621478217.4U CN206378226U (en) | 2016-12-30 | 2016-12-30 | Pressure detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621478217.4U CN206378226U (en) | 2016-12-30 | 2016-12-30 | Pressure detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206378226U true CN206378226U (en) | 2017-08-04 |
Family
ID=59407830
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621478217.4U Active CN206378226U (en) | 2016-12-30 | 2016-12-30 | Pressure detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206378226U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112379279A (en) * | 2020-07-20 | 2021-02-19 | 万向一二三股份公司 | System and method for rapidly detecting charge state of soft package lithium ion battery |
-
2016
- 2016-12-30 CN CN201621478217.4U patent/CN206378226U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112379279A (en) * | 2020-07-20 | 2021-02-19 | 万向一二三股份公司 | System and method for rapidly detecting charge state of soft package lithium ion battery |
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