EP2047390A2 - Systeme de simulation de capteur - Google Patents
Systeme de simulation de capteurInfo
- Publication number
- EP2047390A2 EP2047390A2 EP07823368A EP07823368A EP2047390A2 EP 2047390 A2 EP2047390 A2 EP 2047390A2 EP 07823368 A EP07823368 A EP 07823368A EP 07823368 A EP07823368 A EP 07823368A EP 2047390 A2 EP2047390 A2 EP 2047390A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- signal
- generator
- phase
- simulation
- amplitude
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/02—Digital function generators
- G06F1/03—Digital function generators working, at least partly, by table look-up
- G06F1/0321—Waveform generators, i.e. devices for generating periodical functions of time, e.g. direct digital synthesizers
- G06F1/0328—Waveform generators, i.e. devices for generating periodical functions of time, e.g. direct digital synthesizers in which the phase increment is adjustable, e.g. by using an adder-accumulator
- G06F1/0335—Waveform generators, i.e. devices for generating periodical functions of time, e.g. direct digital synthesizers in which the phase increment is adjustable, e.g. by using an adder-accumulator the phase increment itself being a composed function of two or more variables, e.g. frequency and phase
Definitions
- the present invention relates to a simulation system for simulating the operation of a sensor for translating physical parameters into electrical signals.
- such a simulation system is particularly suitable for simulating the operation of an LVDT type sensor (for Linear Variable Differential Transformer), of the LVT (Linear Variable Transformer) type. ), type RVDT (for "Rotary Variable Differential Transformer” in English), type RVT (for "Rotary Variable Transformer” in English) or type RESOLVER.
- LVDT type sensor for Linear Variable Differential Transformer
- LVT Linear Variable Transformer
- type RVDT for "Rotary Variable Differential Transformer” in English
- type RVT for "Rotary Variable Transformer” in English
- type RESOLVER type RESOLVER.
- sensors are used to translate into electrical signals displacements (linear, angular) and angular velocities. These sensors find particular application in the aeronautical field, particularly in the following functions: extension of the cylinder rod, steering position, displacement and servovalve slide position, engine speed, ...
- an LVDT type sensor is a transformer that modulates a voltage proportionally to the displacement of a ferromagnetic core. This sensor is composed of a primary winding powered by an alternating excitation signal, and two secondary windings. The core slides within these coils, channels the flux and generates voltages in each secondary winding, the amplitudes of which depend on the position thereof;
- a RVDT type sensor is similar to an LVDT type sensor, but it uses a rotating ferromagnetic core;
- sensors of the LVT and RVT type are respectively LVDT and RVDT type sensors, but equipped with only one secondary winding; and a sensor of the RESOLVER type comprises, in place of a ferromagnetic core, an excitation acting as a rotor, and two secondary windings which are positioned at 90 ° so as to act as stators.
- These different sensors are the links of a servo chain, whose control laws are executed by a computer.
- the present invention relates to a simulation system that makes it possible to simulate such a sensor and that can in particular be used to validate the aforementioned control laws, or to automate test procedures, or to test specific application boundary conditions. res that are difficult to reproduce with real sensors, such as a noise injection and phase shift or the event combination of information.
- said simulation system for simulating the operation of a sensor intended to translate digitized physical parameters into electrical signals is remarkable in that it comprises at least one simulation set which comprises:
- a generator which makes it possible to generate, by direct digital frequency synthesis, a digital signal, taking into account at least the following parameters: a frequency, an amplitude, a phase and an amplitude offset;
- the simulation system according to the invention can in particular be used to simulate the operation of a sensor of any of the aforementioned types LVDT, LVT, RVDT, RVT and RESOLVER.
- this simulation system can also be used to simulate the operation of a sensor for measuring at least one particular parameter of an aircraft, such as wheel speed, fuel flow, vibrations and / or engine speed.
- the latter comprises:
- said simulation system comprises, in addition, a single generation means, which is capable of generating a carrier making it possible to carry out a modulation and which is connected to all the calculation means of said simulation system, as well as a means of synchronization (which realizes the synchronization of the different generators).
- said generator of a simulation set comprises:
- phase accumulator which carries out a frequency modulation of a signal
- phase-shifter which realizes a phase modulation of the signal received from the phase accumulator;
- memory which comprises a wave table which contains the binary description of the synthesized signal, and which carries out a phase-amplitude transformation of this signal;
- an attenuator which carries out an amplitude modulation of the signal received from said memory; and an adding means which makes it possible to add to the signal received from said attenuator an amplitude offset and which transmits the signal resulting therefrom.
- said generator may furthermore comprise:
- an interpolator for improving the signal-to-noise ratio of the output signal of said generator.
- a recitation means for pushing the low frequency limits on sinusoidal signals without modifying the parameters design parameters such as the size of the wave table and the frequency of the system.
- this means is capable of reaching frequencies two to four times lower; and / or - switching means for switching an amplitude modulation source; and or
- Figures 1 and 2 are the block diagrams of a simulation system according to the invention, respectively in two different embodiments.
- Figure 3 is a block diagram of a basic embodiment of a generator forming part of a simulation system according to the invention.
- FIG. 4 schematically illustrates a particular embodiment of a generator forming part of a simulation system according to the invention.
- the simulation system 1 according to the invention and shown schematically in different embodiments in FIGS. 1 and 2 is intended to simulate the operation of a sensor (not shown) whose purpose is, generally speaking, to translate physical parameters into electrical signals.
- said simulation system 1 comprises at least one simulation unit 2 as represented in FIG. 1, which comprises:
- a generator 3 which makes it possible to generate, by direct digital frequency synthesis of the DDS ("Direct Digital Synthesis") type, a signal digital signal, and this taking into account at least the following parameters: a frequency, an amplitude and a phase (and generally also an amplitude offset and a gain);
- a digital-to-analog converter 4 of the usual type which is connected via a link 5 to said generator 3 and which converts the digital signal generated by this generator 3 into an analog signal;
- ASIC Application Specifies Integrated Circuit
- the simulation system 1 can in particular be used to simulate the operation of a sensor of any of the following usual types: LVDT, LVT, RVDT, RVT and RESOLVER.
- LVDT type sensor
- LVT primary winding powered by an alternating excitation signal
- RVT right-ventricular transformer
- RESOLVER RESOLVER
- an LVDT type sensor is a transformer that modulates a voltage in proportion to the displacement of a ferromagnetic core. This sensor is composed of a primary winding powered by an alternating excitation signal, and two secondary windings. The core slides inside these coils, channels the flow and generates voltages in each secondary winding, whose amplitudes depend on the position thereof;
- a RVDT type sensor is similar to an LVDT type sensor, but it uses a rotating ferromagnetic core;
- sensors of the LVT and RVT type are respectively LVDT and RVDT type sensors, but equipped with only one secondary winding;
- a RESOLVER type sensor comprises, in place of a ferromagnetic core, an excitation acting as a rotor, and two secondary windings which are positioned at 90 ° so as to act as stators.
- the simulation system 1 according to the invention can also be used to simulate sensors intended to measure particular parameters of an aircraft, such as wheel speed, fuel flow, vibrations and / or engine speed.
- Said simulation system 1 which thus makes it possible to simulate a sensor can be used in particular:
- the simulation system 1 comprises two simulation sets 2 (such as the simulation set 2 represented in FIG. 1), as well as, in particular, the following elements: synchronization 9 common, which is connected via links 10 and 1 1 to each of the generators 3 of said two sets of simulation 2.
- This synchronization means 9 comprising for example a usual clock, realizes the synchronization of the two sets of simulation 2; and - a single generation means 12 which is connected via links 13 and 14 respectively to multiplication means 15 and 16.
- This generation means 12 and multiplication means 15, 16 form said calculation means 6.
- the multiplying means 15, 16 may be digital or be made by the reference inputs of the digital / analog converter.
- the synchronization means 9 makes it possible to control the phase shift between the signals V1 (t) and V2 (t) and the simultaneous evolution of parameters such as the frequency.
- rectangles 17 and 18 in dashed lines, respectively, show the digital portion and the analog portion of said simulation system 1.
- said simulation system 1 may comprise a different number (three, four, ...) of simulation sets 2.
- the generator 3 of each simulation unit 2 of the simulation system 1 comprises, as represented in FIG. 3: a phase accumulator 20 which carries out a frequency modulation a signal;
- phase-shifter 21 which is connected via a link 22 to said phase accumulator 20 and which modulates the phase of the signal received from said phase accumulator 20; a memory 23 which is connected via a link 24 to said phase-shifter 21.
- This memory 23 comprises a wave table which contains the binary description of the synthesized signal. It performs a phase-amplitude transformation of the signal;
- Said generator 3 implements an electronic function that allows the generation of an arbitrary electric waveform.
- the basic principle is to recite a wave table and generate an electrical signal from the following numerical parameters:
- the "recitation" of a wave table represents a technique of traveling the wave table. Like the reading of a page, the meaning is from top to bottom.
- the automaton proceeds in the same way to the reading of the wave table in order to recite the latter.
- the phase accumulator scans the addresses of the table from the lowest address to the highest address incrementally.
- the incrementation speed is a function of the frequency of the signal to be generated. The higher the frequency, the faster the recitation.
- At each address of the table corresponds an instantaneous amplitude of the output signal. The output signal is thus modulated in frequency.
- the phase accumulator 20 is the core of said generator 3.
- the phase accumulator 20 receives a binary code TW (for
- TW "Tuning Word" which corresponds to the frequency of the synthesized output signal.
- This binary code TW fixes the scanning speed of the phase and therefore of the frequency of the generated signal.
- the phase accumulator 20 performs an arithmetic addition of the binary code with respect to the result
- the output of the accumulator 20 may correspond to the following value: (n -M) .TW
- the output result of the accumulator 20 therefore corresponds to a ramp whose slope depends on the value of the binary code TW.
- the size of the output binary word of the phase accumulator 20 is further limited, for example to 32 bits. Therefore, at any time, a change (made by an operator) of the value of the TW bit code allows a change in the slope of the phase accumulator 20, and thus a change in the output frequency.
- the output of the phase accumulator 20 is truncated, since at each instantaneous output value corresponds a position on a trigonometric circle. Thus, only the upper part of the result of the phase accumulator 20 is preserved.
- the output signal is, therefore, composed of two parts:
- phase shifter 21 performs an addition of the upper part of the output signal of the phase accumulator 20 with a volume register. instantaneous phase so as to achieve phase modulation.
- the summed value ⁇ is between 0 ° and 360 °.
- the memory 23 contains the binary description of the synthesized signal.
- the contents of this memory are arbitrary.
- the size of this memory 23 is however fixed by the size of the truncation at the output of the phase accumulator 20.
- the size T of the memory 23 complies with the following law:
- - N is the size of the TW bit code
- M is the size of the truncated portion at the output of the phase accumulator 20.
- the output of the phase shifter 21 acts as a pointer to the wave table.
- the path of this wave table is more or less fast depending on the value of the TW bit code at the input of the phase accumulator 20.
- the amplitude modulator or attenuator 26 which is located at the output of the wave table receives, as information, from the latter, the instantaneous amplitude of the synthesis signal.
- This attenuator 26 carries out a multiplication between an amplitude modulation register and the output of the means 23.
- the memory 23 stores a configurable waveform that is recited at the speed of the phase accumulator 20.
- this waveform may be sinusoidal, triangular or of any other type.
- So A.sin ( ⁇ t + ⁇ ) + B is formed to generate:
- said generator 3 furthermore comprises:
- a synchronization means 30 which makes it possible to parallel said generator 3 with other generators.
- the available synchronization modes include: time synchronization, frequency synchronization, on events (trigger); an interpolator 31 (linear, second order, ...) which is connected, for example, via links 31A and 24 respectively to means 23 and to the phase-shifter 21 and which makes it possible to improve the signal-to-noise ratio , without changing the size of the wave table.
- the calculation of the interpolation is based on the fractional part of the phase accumulator 20.
- This interpolator 31 is connected in parallel with the means 23 and is associated with a selection means 37 which is connected via links 37A , 37B and 37C respectively to the means 23, 31 and 26;
- a recitation means 32 which is, for example, connected via a link 33 to said phase accumulator 20 and which makes it possible to choose several modes of recitation of the wave table, in order to push the limits in terms of low frequency on sinusoidal waveforms without changing the binary resolution of the generator 3;
- a switching means 34 which is, for example, connected via a link 35 to said attenuator 26 and which makes it possible to switch the amplitude modulation source, either internally (digital modulation) or by acquisition of an external voltage reference;
- a clipping means 36 which is mounted downstream of said addition means 28 (to which it is for example connected via a link 36A) and which makes it possible to perform digital clipping of the output signal, in order to to avoid jumps due to possible sign bit errors.
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Analogue/Digital Conversion (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
- Radar Systems Or Details Thereof (AREA)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
- Testing Of Engines (AREA)
- Manipulation Of Pulses (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0606990A FR2904450B1 (fr) | 2006-07-31 | 2006-07-31 | Systeme de simulation de capteur. |
PCT/FR2007/001313 WO2008015333A2 (fr) | 2006-07-31 | 2007-07-30 | Systeme de simulation de capteur |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2047390A2 true EP2047390A2 (fr) | 2009-04-15 |
Family
ID=37907002
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07823368A Withdrawn EP2047390A2 (fr) | 2006-07-31 | 2007-07-30 | Systeme de simulation de capteur |
Country Status (9)
Country | Link |
---|---|
US (1) | US8417500B2 (fr) |
EP (1) | EP2047390A2 (fr) |
JP (1) | JP4997290B2 (fr) |
CN (1) | CN101496013B (fr) |
BR (1) | BRPI0714107A2 (fr) |
CA (1) | CA2657082C (fr) |
FR (1) | FR2904450B1 (fr) |
RU (1) | RU2417428C2 (fr) |
WO (1) | WO2008015333A2 (fr) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9166321B2 (en) | 2011-03-22 | 2015-10-20 | Greatbatch Ltd. | Thin profile stacked layer contact |
US8996115B2 (en) | 2011-04-07 | 2015-03-31 | Greatbatch, Ltd. | Charge balancing for arbitrary waveform generator and neural stimulation application |
US8996117B2 (en) | 2011-04-07 | 2015-03-31 | Greatbatch, Ltd. | Arbitrary waveform generator and neural stimulation application with scalable waveform feature |
US9656076B2 (en) | 2011-04-07 | 2017-05-23 | Nuvectra Corporation | Arbitrary waveform generator and neural stimulation application with scalable waveform feature and charge balancing |
US8874219B2 (en) * | 2011-04-07 | 2014-10-28 | Greatbatch, Ltd. | Arbitrary waveform generator and neural stimulation application |
CN102201788B (zh) * | 2011-05-11 | 2013-10-02 | 清华大学 | 数字噪声产生方法 |
EP2662737A1 (fr) * | 2012-05-08 | 2013-11-13 | Prognost Systems GmbH | Installation de simulation, procédé de fonctionnement d'une installation de simulation ainsi qu'utilisation d'une installation de simulation et d'un procédé de fonctionnement d'une installation de simulation |
US9782587B2 (en) | 2012-10-01 | 2017-10-10 | Nuvectra Corporation | Digital control for pulse generators |
FR3035290B1 (fr) * | 2015-04-16 | 2018-11-30 | Airbus Operations | Carte electronique et systeme d'acquisition et de generation de signaux correspondant, comprenant un ou des commutateurs matriciels numeriques programmables |
CN110989401B (zh) * | 2019-12-19 | 2023-04-07 | 中国航空工业集团公司沈阳飞机设计研究所 | 一种用于液冷系统试验的rvdt特性机构激励装置 |
CN111339705B (zh) * | 2020-03-04 | 2024-02-20 | 海南金盘智能科技股份有限公司 | 一种海洋运输工况下的干式变压器机械振动仿真分析方法 |
CN111190359A (zh) * | 2020-03-12 | 2020-05-22 | 辽宁众联石油天然气有限公司 | 录井参数模拟器 |
CN114136629A (zh) * | 2021-10-20 | 2022-03-04 | 中国航发四川燃气涡轮研究院 | 一种数字油门装置及试车台油门信号模拟仿真系统 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
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US4806881A (en) * | 1987-08-28 | 1989-02-21 | Hewlett-Packard Company | Multi-channel modulated numerical frequency synthesizer |
US5701598A (en) * | 1990-09-14 | 1997-12-23 | Atkinson; Noel D. | Scanning receiver with direct digital frequency synthesis and digital signal processing |
JP3650146B2 (ja) * | 1994-06-24 | 2005-05-18 | オリンパス株式会社 | 二次元データコード付回路図を印刷した印刷物及びそれを用いた波形計測システム |
CN1148567C (zh) * | 2000-10-27 | 2004-05-05 | 合肥工业大学 | 传感器模拟系统 |
JP2005092640A (ja) * | 2003-09-18 | 2005-04-07 | Ricoh Co Ltd | 駆動機構のシミュレーション装置、シミュレーション方法、及びシミュレーションプログラム |
DE102005041427A1 (de) * | 2005-08-31 | 2007-03-01 | Endress + Hauser Conducta Gesellschaft für Mess- und Regeltechnik mbH + Co. KG | Sensorsimulator |
US7889812B2 (en) * | 2006-05-26 | 2011-02-15 | Silicon Laboratories, Inc. | Direct digital frequency synthesizer with phase error correction, method therefor, and receiver using same |
-
2006
- 2006-07-31 FR FR0606990A patent/FR2904450B1/fr not_active Expired - Fee Related
-
2007
- 2007-07-30 RU RU2009107049/08A patent/RU2417428C2/ru not_active IP Right Cessation
- 2007-07-30 EP EP07823368A patent/EP2047390A2/fr not_active Withdrawn
- 2007-07-30 JP JP2009522300A patent/JP4997290B2/ja not_active Expired - Fee Related
- 2007-07-30 CA CA2657082A patent/CA2657082C/fr not_active Expired - Fee Related
- 2007-07-30 WO PCT/FR2007/001313 patent/WO2008015333A2/fr active Application Filing
- 2007-07-30 CN CN2007800284054A patent/CN101496013B/zh not_active Expired - Fee Related
- 2007-07-30 BR BRPI0714107-6A patent/BRPI0714107A2/pt not_active Application Discontinuation
- 2007-07-30 US US12/375,640 patent/US8417500B2/en active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2008015333A2 * |
Also Published As
Publication number | Publication date |
---|---|
WO2008015333A3 (fr) | 2008-06-19 |
CA2657082C (fr) | 2017-05-16 |
CN101496013A (zh) | 2009-07-29 |
US8417500B2 (en) | 2013-04-09 |
FR2904450A1 (fr) | 2008-02-01 |
JP2009545792A (ja) | 2009-12-24 |
WO2008015333A2 (fr) | 2008-02-07 |
RU2009107049A (ru) | 2010-09-10 |
BRPI0714107A2 (pt) | 2013-01-01 |
CN101496013B (zh) | 2013-08-21 |
JP4997290B2 (ja) | 2012-08-08 |
RU2417428C2 (ru) | 2011-04-27 |
CA2657082A1 (fr) | 2008-02-07 |
FR2904450B1 (fr) | 2008-09-26 |
US20090265153A1 (en) | 2009-10-22 |
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