CN103675317B - A kind of low-power consumption servo circuit for quartz flexible accelerometer - Google Patents
A kind of low-power consumption servo circuit for quartz flexible accelerometer Download PDFInfo
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- CN103675317B CN103675317B CN201310627056.5A CN201310627056A CN103675317B CN 103675317 B CN103675317 B CN 103675317B CN 201310627056 A CN201310627056 A CN 201310627056A CN 103675317 B CN103675317 B CN 103675317B
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Abstract
The invention discloses a kind of low-power consumption servo circuit for quartz flexible accelerometer.Main circuit chip ground end is connected with positive supply output terminal, negative supply output terminal respectively by an electric capacity; Positive supply output terminal is connected with transistor T1, T2, T3 through R9, R10, R11 respectively; T1, T2, T3 base stage is connected with output terminal on amplifier respectively, and T1 emitter connects through R12, R13 and T4 emitter, and T4 collector is connected with negative supply output terminal through R14; T2 collector is connected with T5 collector, and T5, T6 emitter is connected with negative supply output terminal through a resistance respectively; T3 collector is connected with transistor T6 collector; T4, T5, T6 base stage is connected with output terminal under amplifier respectively; T3 collector is connected with amplifier inverting input through feedback network; The present invention can use ± 5V powered by direct current, and be applicable to field work, accelerometer quiescent dissipation can be less 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 measures the acceleration of carrier mainly through force feedback principle.Its primary structure form puts the parts such as assembly, differential capacitance sensor and servo circuit by torquer, Detection job to form.In the accelerometer course of work, when there being acceleration effect along input axis of accelerometer, Detection job pendulum assembly deflects, servo circuit detects this change, it is transformed into corresponding electric current to feed back to torquer, make Detection job put 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 through positive/negative voltage stabilizer be converted to ± 9V voltage is that main circuit integrated chip is powered, output stage chip provides the electric current proportional with input acceleration to export.Whole servo circuit is positive/negative is on average not less than 10mA to static working current, and namely quartz flexible accelerometer quiescent dissipation is greater than 300mW.
Conventional quartz flexure accelerometers many employings ± 15V DC power supply, that applies in petroleum industry, in-situ measurement system, vibration survey and physical prospecting field along with quartz flexible accelerometer deepens continuously, these application places many uses accumulators conduct a field operation, require that quartz flexible accelerometer quiescent dissipation is less than 100mW, conventional quartz flexure accelerometers cannot meet request for utilization.
Summary of the invention
The object of the invention is the deficiency for existing quartz flexible accelerometer prior art in low-power consumption, 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, it is characterized in that the earth terminal 10 of described main circuit chip is connected with direct supply positive supply output terminal respectively by a filter capacitor C1, be connected with direct supply negative supply output terminal by a filter capacitor C2, and be 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, negative supply output terminal is corresponding connects; Described positive supply output terminal is connected with the collector of a transistor T1 through a resistance R9 respectively, is connected with the emitter of a transistor T2 through a resistance R10, is connected with the emitter of a transistor T3 through a resistance R11; The base stage of described transistor T1, T2, T3 is connected with output terminal 9 on the amplifier of described main circuit chip respectively, the emitter of described transistor T1 is connected with the emitter of a transistor T4 through resistance R12, R13 successively, the collector of transistor T4 is connected with described negative supply output terminal through a resistance R14, and the link of R12 and R13 is connected with ground wire; The collector of described transistor T2 is connected with the collector of a transistor T5, and the emitter of transistor T5 is connected with described negative supply output terminal through a resistance R15; The collector of described transistor T3 is connected with the collector of a transistor T6, and the emitter of transistor T6 is connected with described negative supply output terminal through a resistance R16; The base stage of described transistor T4, T5, T6 is connected with output terminal 7 under the amplifier of described main circuit chip respectively; The collector of described transistor T3 is connected through the amplifier inverting input 6 of a feedback network with described main circuit chip; Wherein, above-mentioned connection is electrical connection.
Further, described resistance R11, R16 span is 100 Ω to 5k Ω.
Further, the electric capacity C4 span that the amplifier of described main circuit chip adjusts on end 5 and amplifier between output terminal 9 is 10pF to 150pF; Described resistance R9, R10, R12, R13, R14, R15 span is 10 Ω to 5k Ω; Electric capacity C5 span under the amplifier inverting input 6 of described main circuit chip and amplifier between output terminal 7 is 100pF to 1500pF.
Further, described feedback network comprises resistance R4, R5, R6, R7, R8 and electric capacity C10, C11; Wherein, the series circuit of resistance R5 and R6, C11 composition is in parallel, and R5 is in parallel with R7, R8, C10 series circuit of connecting successively, and the series circuit of R5 and R7, R4 composition is in parallel; Wherein: R4, R5, R8 span is 5k Ω to 20k Ω, R6 span is 100 Ω to 2k Ω, R7 span 10k Ω to 40k Ω, and C10, C11 span is 0.01 μ F to 0.1 μ F.
Further, integrator output terminal 8 and the integrator of described main circuit chip adjust end 12 and are connected through an electric capacity C7, and integrator output terminal 8 is connected with ground wire through electric capacity C8, C6, C9 successively, and the two ends of an electric capacity C8 resistance R3 in parallel; The integrator reverse input end 11 of described main circuit chip is connected with ground wire through this electric capacity C9; 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, C8 span be 100pF to 1500pF, C9 span is 10pF to 150pF.
Further, the triangular wave control end 1 of described main circuit chip is connected with earth terminal 10 through a resistance R1, triangular wave forms end 16 and is connected with earth terminal 10 through an electric capacity C3, the electric current of described main circuit chip adjusts end 3 and adjusts end 4 under electric current and be connected through a resistance R2; 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 primarily of device compositions 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 the main circuit chip composition form in conventional quartz flexure accelerometers servo circuit and function.
Described low-power consumption servo circuit improves conventional quartz flexure accelerometers servo circuit power pack, and is redesigned by conventional quartz flexure accelerometers servo circuit output stage chip, changes into and being made up of discrete components such as low-power transistors.Low-power consumption can be realized like this and performance can meet the application such as oil, physical prospecting completely.
Described low-power consumption servo circuit and quartz flexible accelerometer table header divide be electrically connected after can realize to carrier acceleration measurement, 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 minimum must not lower than ± 12V.And the described low-power consumption servo circuit supply voltage for quartz flexible accelerometer is minimum can to ± 5V.
Describedly be different from the chip design of conventional quartz flexure accelerometers servo circuit output stage for output stage in the low-power consumption servo circuit of quartz flexible accelerometer, low-power transistor design is used to realize, buffer circuit is added, to reduce the impact of feedback network on output circuit between output circuit and feedback network.
The described low-power consumption servo circuit for quartz flexible accelerometer can be built by discrete component, also can need to carry out Two-level ensemble to it according to use.
The described low-power consumption servo circuit form of the composition for quartz flexible accelerometer can determine its low power consumption characteristic, and adjustment peripheral components parameter 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 to carry out structural design change to former quartz flexible accelerometer gauge outfit.
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 to be about 2.54cm, use the quartz flexible accelerometer after described low-power consumption servo circuit, minimumly use ± 5V DC power supply, adopt quartz flexible accelerometer quiescent dissipation of the present invention to 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, adjustment end on 1-triangular wave control end, 2-negative supply input end, 3-electric current, under adjustment 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, the formation of 13-detuner positive input terminal, 14-detuner negative input end, 15-positive supply input end, 16-triangular wave are held under 4-electric current.
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, and the differential capacitance sensor of quartz flexible accelerometer gauge outfit part is responsive to the capacitance variation caused by extraneous acceleration.Differential capacitor detecting device converts current signal to described capacitance variations.Benchmark triangular-wave generator provides a voltage signal evenly increased 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, C8 span be 100pF to 1500pF, C9 span is 10pF to 150pF.Through transistor T1, T2, T4, T5 in output-stage circuit, resistance R9, R10, R12, R13, R14, R15 and electric capacity C4, C5 are converted to current signal the voltage signal that main circuit chip exports, 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 is 10 Ω to 5k Ω, C4 span is 10pF to 150pF, C5 span is 100pF to 1500pF.Resistance R4, R5, R6, R7, R8 and electric capacity C10, C11 form feedback network, change the frequency characteristic that parameter can change circuit, adjust accelerometer is dynamic and static, R4, R5, R8 span is 5k Ω to 20k Ω, R6 span is 100 Ω to 2k Ω, R7 span 10k Ω to 40k Ω, C10, C11 span is 0.01 μ F to 0.1 μ F.Transistor T3, T6, R11 and R16 by output circuit and feedback network isolated, to reduce the impact of feedback network on output circuit, R11, R16 span is 100 Ω to 5k Ω.
Table 1 is the quiescent dissipation comparison of test results with conventional quartz flexure accelerometers after the invention process.3 accelerometer gauge outfits are got in experiment at random, connect invention low-power consumption servo circuit of the present invention and conventional accelerometers servo circuit respectively and carry out quiescent dissipation (duty lowest power consumption) test under equal ambient condition.Test shows, low-power consumption servo circuit of the present invention greatly reduces compared with the quiescent dissipation of conventional accelerometers servo circuit.
Table 1 Static State Index contrasts
| Accelerometer gauge outfit | Servo circuit quiescent dissipation (mW) of the present invention | Conventional accelerometers 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, it is characterized in that the earth terminal (10) of described main circuit chip is connected with direct supply positive supply output terminal respectively by a filter capacitor C1, is connected with direct supply negative supply output terminal by a filter capacitor C2, and be 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, negative supply output terminal is corresponding connects; Described positive supply output terminal is connected with the collector of a transistor T1 through a resistance R9 respectively, is connected with the emitter of a transistor T2 through a resistance R10, is connected with the emitter of a transistor T3 through a resistance R11; The base stage of described transistor T1, T2, T3 is connected with output terminal (9) on the amplifier of described main circuit chip respectively, the emitter of described transistor T1 is connected with the emitter of a transistor T4 through resistance R12, R13 successively, the collector of transistor T4 is connected with described negative supply output terminal through a resistance R14, and the link of R12 and R13 is connected with ground wire; The collector of described transistor T2 is connected with the collector of a transistor T5, and the emitter of transistor T5 is connected with described negative supply output terminal through a resistance R15; The collector of described transistor T3 is connected with the collector of a transistor T6, and the emitter of transistor T6 is connected with described negative supply output terminal through a resistance R16; The base stage of described transistor T4, T5, T6 is connected with output terminal (7) under the amplifier of described main circuit chip respectively; The collector of described transistor T3 is connected with the amplifier inverting input (6) of described main circuit chip through a feedback network; Wherein, above-mentioned connection is electrical connection.
2. low-power consumption servo circuit as claimed in claim 1, is characterized in that described resistance R11, R16 span is 100 Ω to 5k Ω.
3. low-power consumption servo circuit as claimed in claim 1 or 2, is characterized in that the amplifier adjustment of described main circuit chip holds the electric capacity C4 span on (5) and amplifier between output terminal (9) to be 10pF to 150pF; Described resistance R9, R10, R12, R13, R14, R15 span is 10 Ω to 5k Ω; Electric capacity C5 span under the amplifier inverting input (6) of described main circuit chip and amplifier between output terminal (7) is 100pF to 1500pF.
4. low-power consumption servo circuit as claimed in claim 3, is characterized in that described feedback network comprises resistance R4, R5, R6, R7, R8 and electric capacity C10, C11; Wherein, the series circuit of resistance R5 and R6, C11 composition is in parallel, and R5 is in parallel with R7, R8, C10 series circuit of connecting successively, and the series circuit of R5 and R7, R4 composition is in parallel; Wherein: R4, R5, R8 span is 5k Ω to 20k Ω, R6 span is 100 Ω to 2k Ω, R7 span 10k Ω to 40k Ω, and C10, C11 span is 0.01 μ F to 0.1 μ F.
5. low-power consumption servo circuit as claimed in claim 4, it is characterized in that the integrator output terminal (8) of described main circuit chip holds (12) to be connected through an electric capacity C7 with integrator adjustment, integrator output terminal (8) is connected with ground wire through electric capacity C8, C6, C9 successively, and the two ends of an electric capacity C8 resistance R3 in parallel; The integrator reverse input end (11) of described main circuit chip is connected with ground wire through this electric capacity C9; 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, C8 span be 100pF to 1500pF, C9 span is 10pF to 150pF.
6. low-power consumption servo circuit as claimed in claim 5, it is characterized in that the triangular wave control end (1) of described main circuit chip is connected with earth terminal (10) through a resistance R1, triangular wave is formed and holds (16) to be connected with earth terminal (10) through an electric capacity C3, on the electric current of described main circuit chip, adjustment end (3) holds (4) to be connected through a resistance R2 with adjusting 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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| CN103675317B true CN103675317B (en) | 2016-01-06 |
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| CN106092145B (en) * | 2016-08-30 | 2019-01-18 | 南京理工大学 | A kind of silicon micro-gyroscope measure and control device based on the separation of 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 |
| 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 |
| 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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| US5473946A (en) * | 1994-09-09 | 1995-12-12 | Litton Systems, Inc. | Accelerometer using pulse-on-demand control |
| CN101592677A (en) * | 2009-06-23 | 2009-12-02 | 北京航空航天大学 | A kind of digital closed loop servo circuit that is used for quartz flexible accelerometer |
| CN201749128U (en) * | 2010-08-18 | 2011-02-16 | 中国电子科技集团公司第四十三研究所 | Servo circuit of quartz flexible accelerometer |
| 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 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP5667474B2 (en) * | 2011-03-07 | 2015-02-12 | 日本航空電子工業株式会社 | Output circuit for current output type servo accelerometer |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5473946A (en) * | 1994-09-09 | 1995-12-12 | Litton Systems, Inc. | Accelerometer using pulse-on-demand control |
| CN101592677A (en) * | 2009-06-23 | 2009-12-02 | 北京航空航天大学 | A kind of digital closed loop servo circuit that is used for quartz flexible accelerometer |
| CN201749128U (en) * | 2010-08-18 | 2011-02-16 | 中国电子科技集团公司第四十三研究所 | Servo circuit of quartz flexible accelerometer |
| 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 |
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