CN105866457B - A kind of accelerometer circuit - Google Patents
A kind of accelerometer circuit Download PDFInfo
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- CN105866457B CN105866457B CN201610296969.7A CN201610296969A CN105866457B CN 105866457 B CN105866457 B CN 105866457B CN 201610296969 A CN201610296969 A CN 201610296969A CN 105866457 B CN105866457 B CN 105866457B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P1/00—Details of instruments
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P15/00—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
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- Measuring Fluid Pressure (AREA)
Abstract
The invention belongs to accelerometer technical fields, are related to a kind of accelerometer circuit.The accelerometer circuit includes signal generator, detection coil, amplifier, torquer coil and partial pressure filter circuit composition.Wherein, excitation is carried out to signal generator, makes the sinusoidal signal of its outputting stable frequency.Detection coil generates the current signal proportional to acceleration.In the electric current for detection coil being generated by amplifier carry out multistage amplification.The electric current of amplifier output flows through the torquer coil in magnetic field, generate the voltage signal proportional with acceleration to the magnetic torque and output for measuring acceleration equalising torque, the voltage signal of the pairs of torquer coil output of partial pressure filter circuit group is filtered and voltage division processing, to which the stable voltage signal of accelerometer output be effectively ensured, the reliability of accelerometer is improved.In addition, the circuit is had the advantages of simple structure and easy realization using electronic component is commonly used.
Description
Technical field
The invention belongs to accelerometer technical fields, are related to a kind of accelerometer circuit.
Background technology
Accelerometer is a kind of sensor that acceleration value is converted to proportional voltage signal.Accelerometer uses circuit
Including signal generator, detection coil, amplifier, torquer coil and partial pressure filter circuit.Signal generator generates sinusoidal signal
Excitation.Detection coil generates the current signal proportional to acceleration.The electric current that amplifier generates detection coil carries out rectification
Amplification.The electric current of amplifier output flows through the torquer coil in magnetic field, generates the magnetic force with measurement acceleration equalising torque
Square simultaneously exports the voltage signal proportional to acceleration, and the voltage signal that partial pressure filter circuit exports torquer coil is filtered
And voltage division processing.
Capacitance thermal stability in existing accelerometer in signal generator for frequency generation is poor, especially earthquake
When frequency generates, it is easy fever, so that the voltage and frequency of output are unstable, reduces the reliability of accelerometer.
Invention content
The purpose of the present invention is：It is proposed a kind of sinusoidal excitation signal simple in structure, that stable frequency and amplitude can be generated, can
The accelerometer circuit high by property.
The technical scheme is that：A kind of accelerometer circuit comprising signal generator, detection coil L1, amplification
Device, torquer coil and partial pressure filter circuit, wherein the signal generator includes resistance R1, R2, R3, R4, R5, diode V1,
The anode of V2, V4, triode V3 and capacitance C1, C2, C3, C4, C5, C6, C7, C8, diode V1 connect external power supply anode, cathode
It is in parallel with capacitance C2 anodes, mono- pins of resistance R3, mono- pins of resistance R1, mono- pins of resistance R9, amplifier feeder ear respectively, two poles
The cathode of pipe V2 connects external power supply negative terminal, and anode bears grade, mono- pins of capacitance C4, capacitance C5 cathode, diode with capacitance C3 respectively
V4 anodes, mono- pins of resistance R4, mono- pins of resistance R6, mono- pins of resistance R8, amplifier in are in parallel；The capacitance C2's is negative
Pole, capacitance C3 anode connect signal ground, a pin of capacitance C1 connects signal ground, another pin body contact body；Resistance R2's is another
Pin is in parallel with a pin of capacitance C6, another pin of capacitance C7 respectively, a pin of resistance R3 and the cathode of diode V4,
A pin of resistance R5 is in parallel, and another pin of resistance R5 is in parallel with the base electrode of the anode of capacitance C5, triode V3 respectively；Electricity
Hold C4 another pin respectively with another pin of resistance R1, another pin of capacitance C6, detection coil L1 another pin simultaneously
Connection, another pin of capacitance C8 are connected with the input terminal of amplifier；The emitter of triode V3 respectively with another pipe of resistance R4
Foot, a pin of resistance R2 are in parallel, the collector of triode V3 respectively with a pin of capacitance C7, a pin of capacitance C8, inspection
A pin of test coil L1 is in parallel；The output of amplifier meets torquer coil L2, and the output of torquer coil L2 is connected to filtering partial pressure
Circuit.
The capacitance C6 and capacitance C7 uses only stone Leaded Ceramic Disc Capacitor.
The amplifier includes resistance R6, R7, R8, R9, R10, diode V5, V7, triode V6, V8, V9 and capacitance C9,
C10, wherein the input terminal of the amplifier is the diode V5 of three feet, and 1 foot of diode V5 connects two in signal generator
2 feet of pole pipe V2, diode V5 are in parallel with a pin of resistance R6, a pin of resistance R7, the base electrode of triode V6 respectively,
3 feet of diode V5 meet the capacitance C8 in signal generator；The collector of triode V6 respectively with 1 foot, the resistance of diode V7
A pin of R9, the base electrode of triode V8 are in parallel；The emitter of triode V6 respectively with a pin of capacitance C9, triode V9
Base electrode it is in parallel；Another pin of resistance R7 is in parallel with another pin of resistance R8, a pin of capacitance C10 respectively；Three poles
The emitter of pipe V9 is connected with another pin of capacitance C10；The collector of triode V9 respectively with another pin of capacitance C9, two
2 feet of pole pipe V7, a pin of capacitance R10 are in parallel；The emitter of triode V8 respectively with another pin of resistance R10, torque
A pin of coil L2 is in parallel.
The partial pressure filter circuit includes capacitance C11, C12, C13, C14 and resistance R11, R12, R13, wherein capacitance C12
A pin, a pin of capacitance C13, resistance R11 a pin be connected to the output end of torquer coil L2 simultaneously；Resistance R11
Another pin it is in parallel with a pin of resistance R12, a pin of capacitance C14 respectively；A pin of capacitance C11 respectively with capacitance
Another pin of C12, another pin of capacitance C13 are in parallel；Another pin of resistance R12 is connected with a pin of resistance R13；Electricity
Another pin, another pin of capacitance C14 and another pin of resistance R13 for holding C11 connect signal ground.
It is an advantage of the invention that：Accelerometer circuit of the present invention to signal generator and amplifier and partial pressure filter circuit into
It has gone completely new design, and has used only stone Leaded Ceramic Disc Capacitor so that accelerometer circuit of the present invention can generate stable frequency f=(3.13
± 0.2) MHz, amplitude A=(2.2 ± 0.2) VAC sinusoidal signals are effectively ensured the stable voltage signal of accelerometer output, carry
The high reliability of accelerometer.In addition, the circuit is had the advantages of simple structure and easy realization using electronic component is commonly used.
Description of the drawings
Fig. 1 is the circuit diagram of the present invention.
Specific implementation mode
The present invention is described in further details below.
With reference to figure 1, accelerometer circuit of the present invention includes diode V1, V2, V4 by resistance R1, R2, R3, R4, R5, and three
The signal generator that pole pipe V3 and capacitance C1, C2, C3, C4, C5, C6, C7, C8 are constituted；The detection coil being made of L1；By resistance
The amplifier that R6, R7, R8, R9, R10, diode V5, V7, triode V6, V8, V9 and capacitance C9, C10 are constituted；Power is constituted by L2
Square coil；By C11, C12, C13, C14 and R11, R12, R13, the partial pressure filter circuit of composition.
The anode of the diode V1 connects external power supply anode (+15V), cathode respectively with capacitance C2 anodes, resistance R3 mono-
Pin, mono- pins of resistance R1, mono- pins of resistance R9, amplifier feeder ear are in parallel.The cathode of the diode V2 connects external power supply
Negative terminal (- 15V), anode bear grade, mono- pins of capacitance C4, capacitance C5 cathode, diode V4 anodes, resistance R4 mono- with capacitance C3 respectively
Pin, mono- pins of resistance R6, mono- pins of resistance R8, amplifier in are in parallel.Signal generator both ends are prevented to realize
Breakdown protection.The cathode of the capacitance C2, the anode of capacitance C3 connect signal ground, and a pin of capacitance C1 meets signal ground, Ling Yiguan
Foot body contact body.Another pin of the resistance R2 is in parallel with a pin of capacitance C6, another pin of capacitance C7 respectively, resistance
A pin of R3 is in parallel with the cathode of diode V4, a pin of resistance R5, and another pin of resistance R5 is respectively with capacitance C5's
Anode, the base electrode of triode V3 are in parallel, and voltage division processing is carried out to signal generator builtin voltage.Another pin of capacitance C4 point
It is not in parallel with another pin of resistance R1, another pin of capacitance C6, another pin of detection coil L1, another pipe of capacitance C8
Foot is connected with the input terminal of amplifier, carries out certain be filtered.The emitter of the triode V3 is respectively with resistance R4's
Another pin, a pin of resistance R2 are in parallel, the collector of triode V3 respectively with a pin of capacitance C7, a pipe of capacitance C8
Foot, a pin of detection coil L1 are in parallel, carry out signal exciting.In parallel with detection coil L1 is used for by the signal generator
The capacitance of frequency-selecting is divided into two independent capacitances, and carries out signal excitation between two capacitors, excitation is realized, to have
Conducive to the anti-interference ability of pumping signal is improved, the reliability of accelerometer is improved.
In addition, the capacitance C6 and capacitance C7 uses only stone Leaded Ceramic Disc Capacitor, the capacitance thermal stability is good, especially in signal
When exciting, thermal losses is low, so as to which signal stabilization is effectively ensured.
The input terminal of the amplifier is the diode V5 of three feet, and 1 foot of diode V5 connects two in signal generator
2 feet of pole pipe V2, diode V5 are in parallel with a pin of resistance R6, a pin of resistance R7, the base electrode of triode V6 respectively,
3 feet of diode V5 meet the capacitance C8 in signal generator.The collector of the triode V6 respectively with 1 foot of diode V7,
A pin of resistance R9, the base electrode of triode V8 are in parallel, the emitter of triode V6 respectively with a pin of capacitance C9, three poles
The base electrode of pipe V9 is in parallel, constitutes the first order of amplifier.Another pin of resistance R7 respectively with another pin, the electricity of resistance R8
The pin for holding C10 is in parallel, and the emitter of triode V9 is connected with another pin of capacitance C10, the collector point of triode V9
It is not in parallel with another pin of capacitance C9,2 feet of diode V7, a pin of capacitance R10, constitute the second level of amplifier.Institute
The emitter for stating triode V8 is in parallel with another pin of resistance R10, a pin of torquer coil L2 respectively, is the of amplifier
Three-level.Amplifier in accelerometer of the present invention realized and amplified to the multistage of signal using multistage Enlargement Design, so as into
One step improves signal strength, enhances signal stabilization.
A pin of the capacitance C12 of the partial pressure filter circuit, a pin of capacitance C13, resistance R11 a pin simultaneously
It is connected to the output end of torquer coil L2.Another pin of resistance R11 respectively with a pin of resistance R12, a pipe of capacitance C14
Foot is in parallel, and another pin of resistance R12 is connected with a pin of resistance R13, constitutes bleeder circuit.A pipe of the capacitance C11
Foot is in parallel with another pin of capacitance C12, another pin of capacitance C13 respectively, and above-mentioned capacitance constitutes filter circuit.In addition, electric
Another pin, another pin of capacitance C14 and another pin of resistance R13 for holding C11 connect signal ground.The filtering partial pressure electricity
Road will filter and voltage divide function is incorporated into same circuit, simplifies circuit structure, is filtered to the signal of torquer coil output
Wave voltage division processing effectively improves the stability of signal.
Stable frequency f=(3.13 ± 0.2) can be generated by being generated between B3, B5 of signal generator in the present embodiment, in Fig. 1
MHz, amplitude A=(2.2 ± 0.2) VAC sinusoidal signals, detection coil generate the current signal proportional to acceleration.Amplifier
The electric current that detection coil is generated carries out rectification amplification.The electric current of amplifier output flows through the torquer coil in magnetic field, produces
The raw voltage signal proportional to the magnetic torque for measuring acceleration equalising torque and output and acceleration, partial pressure filter circuit composition
The voltage signal of torquer coil output is filtered and voltage division processing, to which the stable voltage of accelerometer output be effectively ensured
Signal improves the reliability of accelerometer.
Claims (4)
1. a kind of accelerometer circuit, characterized in that including signal generator, detection coil L1, amplifier, torquer coil and filter
Wavelength-division volt circuit, wherein the signal generator includes resistance R1, R2, R3, R4, R5, diode V1, V2, V4, triode V3
With capacitance C1, C2, C3, C4, C5, C6, C7, C8, the anode of diode V1 connects external power supply anode, cathode respectively with capacitance C2 just
Pole, mono- pins of resistance R3, mono- pins of resistance R1, mono- pins of resistance R9, amplifier feeder ear are in parallel, and the cathode of diode V2 connects outside
Power supply negative terminal is connect, anode bears grade, mono- pins of capacitance C4, capacitance C5 cathode, diode V4 anodes, resistance R4 mono- with capacitance C3 respectively
Pin, mono- pins of resistance R6, mono- pins of resistance R8, amplifier in are in parallel；The cathode of the capacitance C2, the anode of capacitance C3
Connecing signal ground, a pin of capacitance C1 connects signal ground, another pin body contact body；Another pin of resistance R2 respectively with capacitance C6
A pin, another pin of capacitance C7 it is in parallel, a pin of resistance R3 and the cathode of diode V4, resistance R5 a pin simultaneously
Connection, another pin of resistance R5 are in parallel with the base electrode of the anode of capacitance C5, triode V3 respectively；Another pin of capacitance C4 point
It is not in parallel with another pin of resistance R1, another pin of capacitance C6, another pin of detection coil L1, another pipe of capacitance C8
Foot is connected with the input terminal of amplifier；The emitter of triode V3 respectively with another pin of resistance R4, a pin of resistance R2
Parallel connection, the collector of triode V3 respectively with a pin of capacitance C7, a pin of capacitance C8, detection coil L1 a pin simultaneously
Connection；The output of amplifier meets torquer coil L2, and the output of torquer coil L2 is connected to partial pressure filter circuit.
2. accelerometer circuit according to claim 1, characterized in that the capacitance C6 and capacitance C7 is situated between using only stone porcelain
Capacitance.
3. accelerometer circuit according to claim 2, characterized in that the amplifier include resistance R6, R7, R8, R9,
R10, diode V5, V7, triode V6, V8, V9 and capacitance C9, C10, wherein the input terminal of the amplifier is three feet
1 foot of diode V5, diode V5 meet the diode V2 in signal generator, 2 feet of diode V5 respectively with resistance R6 one
Pin, a pin of resistance R7, the base electrode of triode V6 are in parallel, and 3 feet of diode V5 meet the capacitance C8 in signal generator；
The collector of triode V6 is in parallel with 1 foot of diode V7, another pin of resistance R9, the base electrode of triode V8 respectively；Three
The emitter of pole pipe V6 is in parallel with a pin of capacitance C9, the base electrode of triode V9 respectively；Another pin of resistance R7 is distinguished
It is in parallel with another pin of resistance R8, a pin of capacitance C10；Another pin phase of the emitter of triode V9 and capacitance C10
Even；The collector of triode V9 is in parallel with another pin of capacitance C9,2 feet of diode V7, a pin of capacitance R10 respectively；
The emitter of triode V8 is in parallel with another pin of resistance R10, a pin of torquer coil L2 respectively, the current collection of triode V8
Pole is connect with the cathode of diode V1.
4. accelerometer circuit according to claim 3, characterized in that the partial pressure filter circuit include capacitance C11,
C12, C13, C14 and resistance R11, R12, R13, wherein a pin of capacitance C12, a pin of capacitance C13, resistance R11 one
Pin is connected to the output end of torquer coil L2 simultaneously；Another pin of resistance R11 respectively with a pin, the capacitance of resistance R12
A pin of C14 is in parallel；A pin of capacitance C11 is in parallel with another pin of capacitance C12, another pin of capacitance C13 respectively；
Another pin of resistance R12 is connected with a pin of resistance R13；Another pin of capacitance C11, another pin of capacitance C14 and
Another pin of resistance R13 connects signal ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610296969.7A CN105866457B (en) | 2016-05-06 | 2016-05-06 | A kind of accelerometer circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610296969.7A CN105866457B (en) | 2016-05-06 | 2016-05-06 | A kind of accelerometer circuit |
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| Publication Number | Publication Date |
|---|---|
| CN105866457A CN105866457A (en) | 2016-08-17 |
| CN105866457B true CN105866457B (en) | 2018-11-06 |
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| CN201610296969.7A Active CN105866457B (en) | 2016-05-06 | 2016-05-06 | A kind of accelerometer circuit |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4319488A (en) * | 1980-08-01 | 1982-03-16 | Systron-Donner | Accelerometer |
| CN101266260A (en) * | 2008-04-03 | 2008-09-17 | 中国航天时代电子公司第七七一研究所 | Rock quartz accelerometer servo-circuit |
| CN201892685U (en) * | 2010-11-10 | 2011-07-06 | 北京中联博韬科技咨询有限公司 | Accelerometer |
| CN204495851U (en) * | 2015-04-09 | 2015-07-22 | 陕西航晶微电子有限公司 | A kind of high quartz flexure accelerometers servo circuit |
| CN105092894A (en) * | 2015-09-09 | 2015-11-25 | 南京林业大学 | Piezoelectric acceleration sensor signal conversion circuit excited by current source |
-
2016
- 2016-05-06 CN CN201610296969.7A patent/CN105866457B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4319488A (en) * | 1980-08-01 | 1982-03-16 | Systron-Donner | Accelerometer |
| CN101266260A (en) * | 2008-04-03 | 2008-09-17 | 中国航天时代电子公司第七七一研究所 | Rock quartz accelerometer servo-circuit |
| CN201892685U (en) * | 2010-11-10 | 2011-07-06 | 北京中联博韬科技咨询有限公司 | Accelerometer |
| CN204495851U (en) * | 2015-04-09 | 2015-07-22 | 陕西航晶微电子有限公司 | A kind of high quartz flexure accelerometers servo circuit |
| CN105092894A (en) * | 2015-09-09 | 2015-11-25 | 南京林业大学 | Piezoelectric acceleration sensor signal conversion circuit excited by current source |
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| Publication number | Publication date |
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| CN105866457A (en) | 2016-08-17 |
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