CN103675317A - Low-power-consumption servo circuit for quartz flexure accelerometer - Google Patents
Low-power-consumption servo circuit for quartz flexure accelerometer Download PDFInfo
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- CN103675317A CN103675317A CN201310627056.5A CN201310627056A CN103675317A CN 103675317 A CN103675317 A CN 103675317A CN 201310627056 A CN201310627056 A CN 201310627056A CN 103675317 A CN103675317 A CN 103675317A
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Abstract
The invention discloses a low-power-consumption servo circuit for a quartz flexure accelerator. A grounding end of a main circuit chip is connected with a positive power output end and a negative power output end through two capacitors respectively; the positive power output end is connected with a transistor T1, a transistor T2 and a transistor T3 through a resistor R9, a resistor R10 and a resistor R11 respectively; a base electrode of the transistor T1, a base electrode of the transistor T2 and a base electrode of the transistor T3 are respectively connected with an upper output end of an amplifier; an emitting electrode of the transistor T1 is connected with an emitting electrode of a transistor T4 via a resistor R12 and a resistor R13; a collector electrode of the transistor T4 is connected with the negative power output end via a resistor R14; a collector electrode of the transistor T2 is connected with a collector electrode of a transistor T5; an emitting electrode of the transistor T5 and an emitting electrode of the transistor T6 are connected with the negative power output end via two resistors respectively; a collector electrode of the transistor T3 is connected with a collector electrode of the transistor T6; a base electrode of the transistor T4, a base electrode of the transistor T5 and a base electrode of the transistor T6 are respectively connected with a lower output end of the amplifier; and a collector electrode of the transistor T3 is connected with a reverse-phase input end of the amplifier via a feedback network. The low-power-consumption servo circuit can be powered by +/-5V direct-current power, and is suitable for field operation; and the static power consumption of the accelerator can be lower than 50mW.
Description
Technical field
The present invention relates to a kind of servo circuit for quartz flexible accelerometer, especially a kind of low-power consumption servo circuit for quartz flexible accelerometer.
Background technology
Quartz flexible accelerometer is mainly measured the acceleration of carrier by force feedback principle.Its primary structure form is partly to consist of torquer, detection quality pendulum assembly, differential capacitance sensor and servo circuit etc.In the accelerometer course of work, when having acceleration to do the used time along input axis of accelerometer, detecting quality pendulum assembly deflects, servo circuit detects this variation, it is transformed into corresponding electric current to feed back to torquer, make to detect quality pendulum assembly and turn back to origin-location, size and the input acceleration of this electric current are proportional.
Conventional quartz flexure accelerometers servo circuit schematic diagram is with reference to accompanying drawing 1, comprise three terminal regulator, main circuit chip, output stage chip and other peripheral components, wherein main circuit chip comprises the parts such as benchmark triangular-wave generator, differential capacitor detecting device, current integrator.± 15V DC power supply is the power supply of main circuit integrated chip through be converted to ± 9V of positive/negative voltage stabilizer voltage, and output stage chip provides electric current output proportional to input acceleration.Whole servo circuit is positive/negative is on average not less than 10mA to static working current, and quartz flexible accelerometer quiescent dissipation is greater than 300mW.
Adopt ± 15V of conventional quartz flexure accelerometers DC power supply more, along with quartz flexible accelerometer deepening continuously in petroleum industry, in-situ measurement system, vibration survey and the application of physical prospecting field, these application places are used accumulator to conduct a field operation more, require quartz flexible accelerometer quiescent dissipation to be less than 100mW, conventional quartz flexure accelerometers cannot meet request for utilization.
Summary of the invention
The object of the invention is the deficiency in prior art aspect low-power consumption for existing quartz flexible accelerometer, a kind of low-power consumption servo circuit that can be used for quartz flexible accelerometer is provided.
Technical scheme of the present invention is:
A kind of low-power consumption servo circuit for quartz flexible accelerometer, comprise main circuit chip, the earth terminal 10 that it is characterized in that described main circuit chip is connected with direct supply positive supply output terminal, by a filter capacitor C2, is connected with direct supply negative supply output terminal by a filter capacitor C1 respectively, and is connected with the earth terminal of this direct supply; The positive supply input end 15 of described main circuit chip, negative supply input end 2 respectively with described positive supply output terminal, the corresponding connection of negative supply output terminal; Described positive supply output terminal is connected with the collector of a transistor T 1 through a resistance R 9 respectively, through a resistance R 10, is connected with the emitter of a transistor T 2, through a resistance R 11, is connected with the emitter of a transistor T 3; The base stage of described transistor T 1, T2, T3 is connected with output terminal 9 on the amplifier of described main circuit chip respectively, the emitter of described transistor T 1 is connected with the emitter of a transistor T 4 through resistance R 12, R13 successively, the collector of transistor T 4 is connected with described negative supply output terminal through a resistance R 14, and R12 is connected with ground wire with the link of R13; The collector of described transistor T 2 is connected with the collector of a transistor T 5, and the base stage of transistor T 5 is connected with described negative supply output terminal through a resistance R 15; The collector of described transistor T 3 is connected with the collector of a transistor T 6, and the emitter of transistor T 6 is connected with described negative supply output terminal through a resistance R 16; The base stage of described transistor T 4, T5, T6 is connected with output terminal 7 under the amplifier of described main circuit chip respectively; The collector of described transistor T 3 is connected with the amplifier inverting input 6 of described main circuit chip through a feedback network; Wherein, be above-mentionedly connected to electrical connection.
Further, described resistance R 11, R16 span are 100 Ω to 5k Ω.
Further, on the amplifier adjustment end 5 of described main circuit chip and amplifier, capacitor C 4 spans between output terminal 9 are 10pF to 150pF; Described resistance R 9, R10, R12, R13, R14, R15 span are 10 Ω to 5k Ω; Capacitor C 5 spans under the amplifier inverting input 6 of described main circuit amplifier and amplifier between output terminal 7 are 100pF to 1500pF.
Further, described feedback network comprises resistance R 4, R5, R6, R7, R8 and capacitor C 10, C11; Wherein, resistance R 5 is in parallel with the series circuit that R6, C11 form, and R5 and the R7 connecting successively, R8, the parallel connection of C10 series circuit, and R5 is in parallel with the series circuit that R7, R4 form; Wherein: R4, R5, R8 span are 5k Ω to 20k Ω, R6 span is 100 Ω to 2k Ω, R7 span 10k Ω to 40k Ω, and C10, C11 span are 0.01 μ F to 0.1 μ F.
Further, the integrator output terminal 8 of described main circuit chip is connected through a capacitor C 7 with integrator adjustment end 12, and integrator output terminal 8 is connected with ground wire through capacitor C 8, C6, C9 successively through a parallel connection, and the two ends of capacitor C 8 resistance R 3 in parallel; The integrator reverse input end 11 of described main circuit chip is connected with ground wire through this capacitor C 9; Wherein, R3 span is 10k Ω to 70k Ω, and C6 span is 0.01 μ F to 0.1 μ F, and C7 span is 10pF to 150pF, and C8 span is 100pF to 1500pF, and C9 span is 10pF to 150pF.
Further, the triangular wave control end 1 of described main circuit chip through a resistance R 1 be connected with earth terminal 10, triangular wave forms end 16 and is connected with earth terminal 10 through a capacitor C 3, on the electric current of described main circuit chip, adjust end 3 and hold 4 through a resistance R 2, to be connected with adjustment under electric current; Wherein, R1 span is 1k Ω to 10k Ω, and R2 span is 10k Ω to 50k Ω, and C3 span is 10pF to 150pF.
Low-power consumption servo circuit of the present invention is mainly comprised of devices such as main circuit chip and resistance, electric capacity, transistors, schematic diagram is with reference to accompanying drawing 2, and wherein main circuit chip is consistent with main circuit chip composition form and function in conventional quartz flexure accelerometers servo circuit.
Described low-power consumption servo circuit improves conventional quartz flexure accelerometers servo circuit power pack, and conventional quartz flexure accelerometers servo circuit output stage chip is redesigned, and changes into by discrete components such as low-power transistors and forming.Low-power consumption and performance can be realized like this and the applications such as oil, physical prospecting can be met completely.
Described low-power consumption servo circuit and quartz flexible accelerometer table header are divided after being electrically connected can realize the measurement to carrier acceleration, and its assembly method is identical with conventional quartz flexure accelerometers.
According to the low-power consumption servo circuit for quartz flexible accelerometer provided by the invention, also there is following additional technical feature:
The described low-power consumption servo circuit for quartz flexible accelerometer redesigns conventional quartz flexure accelerometers servo circuit power supply mode.Conventional quartz flexure accelerometers servo circuit power supply is minimum must not be lower than ± 12V.Can be to ± 5V and described low-power consumption servo circuit supply voltage for quartz flexible accelerometer is minimum.
The described low-power consumption servo circuit output stage for quartz flexible accelerometer is different from the chip design of conventional quartz flexure accelerometers servo circuit output stage, use low-power transistor design to realize, between output circuit and feedback network, add buffer circuit, to reduce the impact of feedback network on output circuit.
The described low-power consumption servo circuit for quartz flexible accelerometer can be built by discrete component, also can according to using, need to carry out secondary to it integrated.
The described low-power consumption servo circuit form of the composition for quartz flexible accelerometer can determine its low-power consumption characteristic, adjusts peripheral components parameter and can not change circuit power consumption, but can adjust technical indicators such as quartz flexible accelerometer noise, bandwidth.
The described design of the low-power consumption servo circuit for quartz flexible accelerometer takes into full account the compatibility with conventional quartz flexure accelerometers gauge outfit, does not need former quartz flexible accelerometer gauge outfit to carry out structural design change.
According to a kind of low-power consumption servo circuit for quartz flexible accelerometer provided by the invention compared with prior art tool have the following advantages:
Accelerometer servo circuit size of the present invention only has diameter 2.54cm, use the quartz flexible accelerometer after described low-power consumption servo circuit, minimum use ± 5V DC power supply, adopt quartz flexible accelerometer quiescent dissipation of the present invention can be less than 50mW, make quartz flexible accelerometer first Application in battery powered field work place.
Accompanying drawing explanation
Fig. 1 is the fundamental diagram of conventional quartz flexure accelerometers servo circuit.
Fig. 2 is the fundamental diagram of a kind of low-power consumption servo circuit for quartz flexible accelerometer of the present invention.
Wherein, on 1-triangular wave control end, 2-negative supply input end, 3-electric current, adjust and under end, 4-electric current, adjust under end, 5-amplifier adjustment end, 6-amplifier inverting input, 7-amplifier on output terminal, 8-integrator output terminal, 9-amplifier output terminal, 10-earth terminal, 11-integrator reverse input end, 12-integrator adjustment end, 13-detuner positive input terminal, 14-detuner negative input end, 15-positive supply input end, 16-triangular wave and form and hold.
Embodiment
A kind of embodiment of the low-power consumption servo circuit for quartz flexible accelerometer is:
With reference to accompanying drawing 2, a kind of low-power consumption servo circuit for quartz flexible accelerometer comprises: the devices such as main circuit chip and resistance, electric capacity, transistor.Wherein main circuit chip comprises the parts such as benchmark triangular-wave generator, differential capacitor detecting device, current integrator.
Specific implementation process: servo circuit is powered by external dc power supply, C1, C2 are power filtering capacitor, the differential capacitance sensor of quartz flexible accelerometer gauge outfit part is responsive to the capacitance variation being caused by extraneous acceleration.Differential capacitor detecting device converts current signal to described capacitance variations.Benchmark triangular-wave generator provides a voltage signal evenly increasing in time for differential capacitor detecting device, R1, R2 and C3 are the peripheral components of benchmark triangular-wave generator, the amplitude of adjusting triangle ripple and frequency, wherein R1 span is 1k Ω to 10k Ω, R2 span is 10k Ω to 50k Ω, and C3 span is 10pF to 150pF.Current integrator is transformed into voltage the current signal from differential capacitor detecting device, R3, C6, C7, C8 and C9 are the peripheral components of current integrator, the frequency characteristic of adjustable quartz flexure accelerometers, wherein R3 span is 10k Ω to 70k Ω, C6 span is 0.01 μ F to 0.1 μ F, C7 span is 10pF to 150pF, and C8 span is 100pF to 1500pF, and C9 span is 10pF to 150pF.In output-stage circuit through transistor T 1, T2, T4, T5, resistance R 9, R10, R12, R13, R14, R15 and capacitor C 4, C5 are converted to current signal the voltage signal of main circuit chip output, to add to the torquer of quartz flexible accelerometer gauge outfit part, this electric current is directly proportional to input acceleration, wherein R9, R10, R12, R13, R14, R15 span are 10 Ω to 5k Ω, C4 span is 10pF to 150pF, and C5 span is 100pF to 1500pF.Resistance R 4, R5, R6, R7, R8 and capacitor C 10, C11 form feedback network, change the frequency characteristic that parameter can change circuit, to accelerometer is dynamic and static, adjust, R4, R5, R8 span are 5k Ω to 20k Ω, R6 span is 100 Ω to 2k Ω, R7 span 10k Ω to 40k Ω, C10, C11 span are 0.01 μ F to 0.1 μ F.Transistor T 3, T6, R11 and R16 are isolated by output circuit and feedback network, and to reduce the impact of feedback network on output circuit, R11, R16 span are 100 Ω to 5k Ω.
Table 1 be after the invention process with the quiescent dissipation comparison of test results of conventional quartz flexure accelerometers.3 accelerometer gauge outfits are got in experiment at random, connect respectively invention low-power consumption servo circuit of the present invention and traditional accelerometer servo circuit and carry out quiescent dissipation (duty lowest power consumption) test under equal environmental baseline.Test shows, the quiescent dissipation of the more traditional accelerometer servo circuit of low-power consumption servo circuit of the present invention greatly reduces.
The contrast of table 1 Static State Index
| Accelerometer gauge outfit | Servo circuit quiescent dissipation of the present invention (mW) | Tradition accelerometer servo circuit quiescent dissipation (mW) |
| 1# | 35 | 305 |
| 2# | 40 | 320 |
| 3# | 40 | 315 |
Claims (6)
1. the low-power consumption servo circuit for quartz flexible accelerometer, comprise main circuit chip, the earth terminal (10) that it is characterized in that described main circuit chip is connected with direct supply positive supply output terminal, by a filter capacitor C2, is connected with direct supply negative supply output terminal by a filter capacitor C1 respectively, and is connected with the earth terminal of this direct supply; The positive supply input end (15) of described main circuit chip, negative supply input end (2) respectively with described positive supply output terminal, the corresponding connection of negative supply output terminal; Described positive supply output terminal is connected with the collector of a transistor T 1 through a resistance R 9 respectively, through a resistance R 10, is connected with the emitter of a transistor T 2, through a resistance R 11, is connected with the emitter of a transistor T 3; The base stage of described transistor T 1, T2, T3 is connected with output terminal (9) on the amplifier of described main circuit chip respectively, the emitter of described transistor T 1 is connected with the emitter of a transistor T 4 through resistance R 12, R13 successively, the collector of transistor T 4 is connected with described negative supply output terminal through a resistance R 14, and R12 is connected with ground wire with the link of R13; The collector of described transistor T 2 is connected with the collector of a transistor T 5, and the base stage of transistor T 5 is connected with described negative supply output terminal through a resistance R 15; The collector of described transistor T 3 is connected with the collector of a transistor T 6, and the emitter of transistor T 6 is connected with described negative supply output terminal through a resistance R 16; The base stage of described transistor T 4, T5, T6 is connected with output terminal (7) under the amplifier of described main circuit chip respectively; The collector of described transistor T 3 is connected with the amplifier inverting input (6) of described main circuit chip through a feedback network; Wherein, be above-mentionedly connected to electrical connection.
2. low-power consumption servo circuit as claimed in claim 1, is characterized in that described resistance R 11, R16 span are 100 Ω to 5k Ω.
3. low-power consumption servo circuit as claimed in claim 1 or 2, is characterized in that on the amplifier adjustment end (5) of described main circuit chip and amplifier, capacitor C 4 spans between output terminal (9) are 10pF to 150pF; Described resistance R 9, R10, R12, R13, R14, R15 span are 10 Ω to 5k Ω; Capacitor C 5 spans under the amplifier inverting input (6) of described main circuit amplifier and amplifier between output terminal (7) are 100pF to 1500pF.
4. low-power consumption servo circuit as claimed in claim 3, is characterized in that described feedback network comprises resistance R 4, R5, R6, R7, R8 and capacitor C 10, C11; Wherein, resistance R 5 is in parallel with the series circuit that R6, C11 form, and R5 and the R7 connecting successively, R8, the parallel connection of C10 series circuit, and R5 is in parallel with the series circuit that R7, R4 form; Wherein: R4, R5, R8 span are 5k Ω to 20k Ω, R6 span is 100 Ω to 2k Ω, R7 span 10k Ω to 40k Ω, and C10, C11 span are 0.01 μ F to 0.1 μ F.
5. low-power consumption servo circuit as claimed in claim 4, the integrator output terminal (8) that it is characterized in that described main circuit chip is connected through a capacitor C 7 with integrator adjustment end (12), integrator output terminal (8) is connected with ground wire through capacitor C 8, C6, C9 successively through a parallel connection, and the two ends of capacitor C 8 resistance R 3 in parallel; The integrator reverse input end (11) of described main circuit chip is connected with ground wire through this capacitor C 9; Wherein, R3 span is 10k Ω to 70k Ω, and C6 span is 0.01 μ F to 0.1 μ F, and C7 span is 10pF to 150pF, and C8 span is 100pF to 1500pF, and C9 span is 10pF to 150pF.
6. low-power consumption servo circuit as claimed in claim 5, the triangular wave control end (1) that it is characterized in that described main circuit chip through a resistance R 1 be connected with earth terminal (10), triangular wave forms end (16) and is connected with earth terminal (10) through a capacitor C 3, on the electric current of described main circuit chip, adjust end (3) and hold (4) to be connected through a resistance R 2 with adjustment under electric current; Wherein, R1 span is 1k Ω to 10k Ω, and R2 span is 10k Ω to 50k Ω, and C3 span is 10pF to 150pF.
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| CN201310627056.5A CN103675317B (en) | 2013-11-28 | 2013-11-28 | A kind of low-power consumption servo circuit for quartz flexible accelerometer |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106092145A (en) * | 2016-08-30 | 2016-11-09 | 南京理工大学 | A kind of silicon micro-gyroscope measure and control device separated based on gauge outfit plate |
| CN108205350A (en) * | 2016-12-16 | 2018-06-26 | 航天科工惯性技术有限公司 | A kind of high temperature resistant servo circuit voltage regulator and accelerometer |
| CN110579626A (en) * | 2019-10-22 | 2019-12-17 | 西安微电子技术研究所 | Miniature metal full-sealed quartz flexible accelerometer servo circuit and processing method thereof |
| CN111024982A (en) * | 2019-12-18 | 2020-04-17 | 青岛航天半导体研究所有限公司 | High-temperature quartz flexible accelerometer servo circuit |
| CN114414842A (en) * | 2022-01-18 | 2022-04-29 | 厦门乃尔电子有限公司 | Circuit and measuring device for static acceleration measurement |
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| CN102539834A (en) * | 2011-12-31 | 2012-07-04 | 航天科工惯性技术有限公司 | Device and method used for detecting swing symmetry of swing assembly |
| JP2012185052A (en) * | 2011-03-07 | 2012-09-27 | Japan Aviation Electronics Industry Ltd | Output circuit for current output type servo accelerometer |
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2013
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106092145A (en) * | 2016-08-30 | 2016-11-09 | 南京理工大学 | A kind of silicon micro-gyroscope measure and control device separated based on gauge outfit plate |
| CN108205350A (en) * | 2016-12-16 | 2018-06-26 | 航天科工惯性技术有限公司 | A kind of high temperature resistant servo circuit voltage regulator and accelerometer |
| CN110579626A (en) * | 2019-10-22 | 2019-12-17 | 西安微电子技术研究所 | Miniature metal full-sealed quartz flexible accelerometer servo circuit and processing method thereof |
| CN111024982A (en) * | 2019-12-18 | 2020-04-17 | 青岛航天半导体研究所有限公司 | High-temperature quartz flexible accelerometer servo circuit |
| CN111024982B (en) * | 2019-12-18 | 2024-01-30 | 青岛航天半导体研究所有限公司 | Servo circuit of high-temperature quartz flexible accelerometer |
| CN114414842A (en) * | 2022-01-18 | 2022-04-29 | 厦门乃尔电子有限公司 | Circuit and measuring device for static acceleration measurement |
| CN114414842B (en) * | 2022-01-18 | 2023-07-04 | 厦门乃尔电子有限公司 | Circuit capable of being used for static acceleration measurement and measuring device |
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