Compensating accelerometer

FIELD: measurement equipment.

SUBSTANCE: pending compensating accelerometer comprising sensor, angle sensor, whose output is connected to the amplifier input, torque sensor, the negative feedback, the phase detector of negative feedback integrator, whose input is connected to the output of the amplifier. Additional sensor inputs and the phase angle detector negative feedback integrator connected to the output of the reference voltage generator. The output of phase detector negative feedback integrator connected to the input of the integrating amplifier, the outputs of which are connected to inputs of synchronous generators of the waiting pair via a controllable relay element and a level converter. Outputs of the waiting pair synchronous generator connected to the input of the binary multiplier via series connected Information inputs reversible binary counter transducer additional code in direct scheme and collection, and the output of the binary multiplier is connected via a digital filter having one of the inputs of the sign switch, the other input of which is connected to the output reversible binary counter. The output of the iconic selector is connected to an input torque sensor through the adder. The output of the binary multiplier is a digital output. Additional inputs couples waiting for synchronous generators controlled relay element connected to the output of the clock circuit. The negative feedback error introduced by the dynamic control unit having an input connected to the output of the phase detector through a negative feedback smoothing filter, and an error output dynamic control unit is connected to one input of the adder through a voltage-current converter. In addition, the output relay managed element is connected to the analog input of the filter with the transfer function (where T - time constant, s - Laplace transform operator) and the analog output of the filter is an analog output device.

EFFECT: improved accuracy and bandwidth extension.

3 dwg

 



 

Same patents:

FIELD: measurement equipment.

SUBSTANCE: compensation-type accelerometer includes a sensitive element, an angle sensor, a phase detector of negative feedback and an integrating amplifier. A reference voltage generator is connected both to the input of the angle sensor and to the input of the phase detector of negative feedback. The comparator output is connected in series via information inputs to the torque sensor input through a level converter, a pair of waiting synchronous generators, a reversible binary counter, an adding binary counter, the output of which is connected to one of the inputs of the comparison circuit, a threshold element, an electronic key, a current generator connected to the input of the electronic key. An auxiliary frequency generator is connected to inputs of the comparator, the pair of waiting synchronous generators, the adding binary counter and the reversible binary counter. One of the outputs of the phase detector of negative feedback is connected to the input of the torque sensor through a filter. To the comparator input there introduced is a stabilising circuit containing two outlines, the input of which is connected to the output of the phase detector of negative feedback. The output of the reversible binary counter is a digital output of the compensation-type accelerometer.

EFFECT: possible measurement of accelerations; a compensation-type accelerometer operates in an autooscillation mode, with astatism and with enlarged band-pass and considerable quick action.

3 dwg

FIELD: measurement equipment.

SUBSTANCE: accelerometer comprises a body, the first plate from single-crystal silicon with mobile and fixed parts and elastic links that connect them along the suspension axis, a differential capacitance position converter with two fixed electrodes on the second plate, the third plate, a magnetoelectric power converter with a permanent magnet and a compensation coil installed on two supports on the mobile part, a weight on the mobile part, an amplifier. To minimise angular deformation of the mobile part in the first plate when exposed to temperature, there are slots made symmetrically on it in the area of location of supports installed symmetrically relative to the axis of suspension.

EFFECT: increased accuracy of acceleration measurement.

5 cl, 5 dwg

FIELD: instrumentation.

SUBSTANCE: in compensation pendulous accelerometer, in which a magnetoelectric torque sensor represents two magnetic systems comprising permanent magnets, fixed at the end part into magnetic conductors in the form of a rim, a coil of the torque sensor is sprayed into the upper and lower surfaces of a single plate of single-crystal silicon of a pendulous sensitive element, the measurement unit is made in the form of a compact bag glued in at least four areas of contact of slots on flat insulating boards and strips of the single plate of single-crystal silicon of the pendulous sensitive element, supply and release of the electric signal to elements of the measurement unit from elements of electronics is carried with the help of current-conducting contacts made in the form of pins, fixation of elements of magnetic systems, the measurement unit and elements of electronics is carried out with the help of pairs of screws directed towards each other, which are fixed in a common tube with an inner thread, at the same time in bases of heads of which there are sealing gaskets, elements of electronics and a heat sensor are arranged in a separate compartment, which is insulated by a cover, and in the place of contact of magnetic system elements and an electronics board there is an insulating gasket, besides, in a protective jacket there is a hole to vacuumise the inner space of the instrument.

EFFECT: improved accuracy of measurement.

3 dwg

FIELD: measurement equipment.

SUBSTANCE: compensation-type accelerometer is intended for use in the stabilisation and navigation systems. The device comprises a sensing element, position sensor, the output of which is connected to the amplifier input with a stable amplification factor, magnetoelectric power converter connected to the negative feed-back. Meanwhile it is additionally added by analogue, integrating and discrete integrating negative feed-backs. The analogue negative feed-back is made from the position sensor output to one of inputs of the magnetoelectric power converter through series connected to information inputs the AC amplifier, first logic element, XOR element, filter, first voltage - current converter and summator. The integrating negative feed-back is made from XOR element output to the magnetoelectric power converter input through series connected to information inputs the first integrator, second voltage - current converter and the summator. The discrete integrating negative feed-back is made from the XOR element output to the magnetoelectric power converter input through series connected to information inputs the second integrator, trigger and summator. Besides, the reference voltage generator is connected both to the position sensor, and to the phase shifter, the output of which is connected to one of the XOR element inputs through the second logic element, and one of the trigger outputs is connected to the input of a backward-forward binary counter, the output of which is a discrete output of the compensation-type accelerometer.

EFFECT: expansion of passband and improvement of accuracy of acceleration measurement.

3 dwg

Accelerometer // 2541716

FIELD: instrumentation.

SUBSTANCE: device comprises a sensitive element (1), a position sensor (2), the outlet of which is connected to an input of an amplifier (4) with stable amplification ratio, a magnetoelectric power converter (15), connected into negative feedback. At the same time it includes analogue, integrating and discrete negative feedbacks. The analogue negative feedback is implemented at the outlet of the position sensor (2) to one of the inlets of the magnetoelectric power converter (15) via the following components serially connected along information inlets: an AC amplifier (4), the first logical element (5), an EXCLUSIVE OR circuit (8), a filter (9), the first converter (10) of voltage-current and a summator (11). The integrating negative feedback is implemented from the outlet of the EXCLUSIVE OR circuit (8) to the input of the magnetoelectric power converter (15) via the following components that are serially connected by information inputs: the first integrator (12), the second converter (13) of voltage-current and the summator (11). The discrete negative feedback is implemented from the outlet of the EXCLUSIVE OR circuit (8) to the input of the magnetoelectric power converter (15) via the following components that are serially connected by information inputs: a trigger (14) and the summator (11). Besides, a reference voltage generator (3) is connected both with the position sensor (2) and with a phase shifter (6). The outlet of the phase shifter (6) is connected to one of inlets of the EXCLUSIVE OR circuit (8) via the second logical element (7). One of outlets of the trigger (14) is connected to the inlet of a reversible binary counter (16), the outlet of which is a discrete outlet of the accelerometer.

EFFECT: expansion of pass band and increased accuracy of acceleration measurements.

6 dwg

FIELD: measurement equipment.

SUBSTANCE: compensation-type accelerometer comprises inertia element (1), oscillating system (2), displacement transducer (3), balancing circuit amplifier (4), inverse converter (5), scaling resistor connection assembly (6), and temperature compensating amplifier (7). To a negative feedback circuit of a temperature compensating amplifier there connected between its inverting input and a feedback resistor is a circuit consisting of temperature sensor R01 shunted with resistor R"Ш1", the electrical resistance value of which is chosen based on the following: where where K(t) - compensated value of temperature instability of a conversion factor of an accelerometer; Kt0(t0), Kt0(Δt1), Kt0(Δt2) - temperature characteristic of a temperature compensating amplifier at switched-off temperature sensors under conditions of action of rated, reduced and increased working temperatures of the accelerometer respectively; KA(t0), KA(Δt1), KA(Δt2) - temperature characteristic of the accelerometer at switched-off temperature sensors under conditions of action of rated, reduced and increased working temperatures of the accelerometer respectively; Kt(t0), Kt(Δt1), Kt(Δt2) - temperature characteristic of the chosen configuration of a temperature compensating amplifier under conditions of action of rated, reduced and increased working temperatures of the accelerometer respectively; R0, R01 - electrical resistance of copper coils connected to the input of the temperature compensating amplifier and to its negative feedback circuit respectively, at rated value of environment; αR, αM - temperature coefficient of resistance of resistors R"П", R"П1" and copper coils R0, R01 respectively; Δt - increase of ambient air temperature value of the accelerometer relative to its rated value. Connection of two temperature sensors to a circuit of the temperature compensating amplifier allows linearising compensated temperature characteristic of the accelerometer.

EFFECT: reduction of temperature instability of conversion factor of the accelerometer and reduction of labour intensity of its temperature adjustment process.

3 dwg

А - A

ОС - FB

М - M

Ш - "Ш"

П - "П"

Accelerometer // 2527660

FIELD: measurement equipment.

SUBSTANCE: accelerometer comprises a sensitive element, divergence of which is fixed with an angle sensor, outputs of which are connected with inputs of a summator via a threshold element and an integrating amplifier, and a moment sensor included into negative feedback. The output of the summator is the analogue output of the device. To increase accuracy and to expand pass band, two negative feedbacks are introduced into the accelerometer: one - from the output of the moment sensor to one of inputs of the moment sensor via a differentiating filter, the other - negative integrating feedback, is implemented from the output of the summator to the other input of the moment sensor in series along information inputs via a comparator, a lever converter, a pair of triggered synchronous generators, a reversible binary counter, a comparison circuit, a trigger, an electronic key. Additional inputs of the comparator, the reversible binary counter, triggered synchronous generators are connected to a generator of auxiliary frequency. Besides, the input of the electronic key is connected with the output of the current generator. The input of the comparison circuit is connected with the output of the generator of auxiliary frequency via the summing binary counter. The output of the reversible binary counter is a digital output of the device. The negative feedback implemented from the outlet of the angle sensor to the inlet of the moment sensor, via a differentiating filter, performs stabilisation of accelerometer parameters.

EFFECT: introduction of integrating feedback into an accelerometer makes it possible to create a device with absence of offset by divergence, operating in self-oscillation mode, with expanded pass band and considerable efficiency.

2 dwg

Accelerometer // 2526589

FIELD: instrumentation.

SUBSTANCE: accelerometer comprises sensitive element and pickup of the moment included in negative feedback. Accelerometer incorporates extra two negative integrating feedbacks, one from angle transducer to one of moment pickup inputs via feedback amplified and first integrator at a time. Another negative integrating feedback runs from angle transducer to another input of moment pickup via data inputs and amplifier. Besides, it incorporates filter, comparator, level transducer, pair of triggered sync generators, reversible binary counter, comparator, second integrator, trigger and electronic switch. Comparator extra inputs are connected with auxiliary frequency generator output. Electronic switch input is connected with current generator output while comparator input is connected with auxiliary frequency generator output via adding binary counter and output of reversible binary counter makes the device digital code.

EFFECT: higher precision.

3 dwg

FIELD: measurement equipment.

SUBSTANCE: compensation accelerometer comprises a body with a stand, the first plate from single-crystal silicon, the second plate with two fixed electrodes of a differential capacitance position converter, the third plate, a magnetoelectric power converter with a permanent magnet, an amplifier, besides, serially along the length of the stand from the base of the stand there is a permanent magnet, the second plate, the first plate and the third plate. In accordance with the invention a bushing from invar is installed on the stand, on which the second plate, the first plate and the third plate are arranged. The second and third plate are made of pyrex.

EFFECT: higher accuracy of measurement acceleration.

3 dwg

FIELD: measurement equipment.

SUBSTANCE: invention relates to measurement equipment and is designed for use in devices of compensation type with a digital outlet in systems of stabilisation, navigation and homing. The compensation accelerometer comprises a sensitive element, an angle sensor, an amplifier, a phase detector of negative feedback, an integrating negative feedback from the outlet of the comparator to the inlet of the torque sensor via serially connected comparator, level converter, a pair of waiting synchronous generators, reversible binary counter, comparison circuit, trigger, electronic key, connected by information inlets. Besides, the local negative feedback is introduced from the amplifier outlet to the inlet of the phase detector of negative feedback via serially connected summator, threshold element, integrating and differentiating link and delay link connected by information inlet. The outlet of the phase detector of the negative feedback is connected to the inlet of the comparator via a differentiating link. The outlet of the reversible binary counter is a digital outlet of the compensation accelerometer.

EFFECT: introduction of a local negative feedback into a compensation accelerometer makes it possible to stabilise parameters of a compensation accelerometer, and implementation of an integrating-differentiating and differentiating link in the integrating negative feedback makes it possible to increase accuracy of measurement and to expand pass bad due to implementation of the astable mode.

4 dwg

FIELD: stabilization, targeting and navigation technologies.

SUBSTANCE: device has sensor, angle detector, amplifier and momentum detector, switched in check connection, band filter, two emitter repeaters, JK and RS triggers, coincidence circuits, stack registers, waiting synchronous generators, reverse binary counter, combination binary adder, precision relay element, code transformer, comparator, phase-displacing circuit, pulse duration former. A negative check connection is inserted into device, which contains two parallel channels. One channel is connected from one of outputs of asynchronous RS-trigger to input of adding device through, serially connected by information inputs, one pair of AND coincidence circuits, reverse binary counter, first stack register, second stack register, code transformer, combination binary adder, first precision relay element. Second channel is connected from another output of asynchronous RS-trigger to input of adder through, serially connected by information inputs, modulus 2 adding circuit and second precision element.

EFFECT: increased bandwidth.

1 dwg

FIELD: measurement technology.

SUBSTANCE: compensation accelerometer has first plate provided with movable member, second and third plates, ac voltage two-phase generator,, dc reference voltage source, differential capacitance converter provided with first and second capacitors formed by motionless electrodes and one movable electrode, amplifier with two opposite-phase outputs. Differential capacitance converter simulator is introduced additionally. Capacitance of the third capacitor of simulator equals to capacitance of first capacitor. Capacitance of fourth capacitor equals to capacitance of second capacitor. First output of third capacitor is connected with one output of ac voltage two-phase generator. The first output of the fourth capacitor is connected with second output of ac voltage two-phase generator. Amplifier is made of first and second ac amplifiers, differential amplifier, and phase demodulator and dc amplifier with two opposite-phase outputs. Movable electrode is connected with input of first ac amplifier. Connection point of second outputs of third and fourth capacitors is connected with input of second ac amplifier. Outputs of first and second ac amplifiers are connected to inputs of differential amplifier.

EFFECT: improved precision of measurement of acceleration.

3 cl, 4 dwg

FIELD: measuring engineering.

SUBSTANCE: compensation accelerometer comprises plate provided with movable and unmovable members and flexible pivot, differential capacitive position converter, magnet-electrical power converter, first and second resistors, high-frequency generator, first and second alternative current generators, adding amplifier, demodulator, and direct current amplifier. The first and second resistors are made by spraying a chrome-silicide alloy on one substrate.

EFFECT: enhanced accuracy of measuring.

1 cl, 5 dwg

FIELD: device can be used as sensitive element in radar and guiding systems as well as in stabilization systems; it can be also used in compensation-type mechanical value measuring devices.

SUBSTANCE: two channels in the circuit of negative feedback are introduced into the device. One channel is analog one and goes from output of amplifier to one input of torque detector through the following elements connected in series: first logic gate, first NOR circuit which has the other input connected with reference voltage generator through second logic gate, first precision relay element, ripple filter, mated high-pass filter, first voltage-to-current converter and first adder. The other channel, which has to be digital one, is introduced from output of amplifier to the other input of torque detector through the following elements connected in series: first logic gate, first NOR gate, first precision relay element, ripple filter, low-pass mated filter, second adder, second relay element which has two outputs connected with inputs of two sync generators, deviation sign flip-flop, first pair of NOT gates, first pair of AND logic multiplication gates, first reversible binary counter which has one output connected with sum register. Two channels -analog channel for stabilizing transient process and digital channel for removing digital code accompanied with continuous digital filtering of output data - introduced into the device provide output of current data not during specific time interval but continuously.

EFFECT: improved precision.

2 dwg

FIELD: mechanical measurement engineering.

SUBSTANCE: device can be used as sensitive element in stabilization, guiding and navigation systems, it also can be used in devices for measuring compensation-type mechanical values. Two active parallel negative feedbacks are introduced into the device. First analog feedback goes from output of amplifier to one input of second adder which has output connected with input of torque generator through the following members connected in series: first logic gate, NOR gate which has second input connected with reference voltage generator via second logic gate, first precision relay element, ripple filter, high-pass filter, voltage-to-current first converter. The other negative feedback is digital. It goes from output of amplifier to second input of second adder through the following elements connected in series: first logic gate, NOR gate, first precision relay element, ripple filter, first adder, relay element, synchronous generators, RS flip-flop, first pair of AND gates, low-digit reversible binary counter, low-digit summing register, digital data- to-direct code converter, binary multiplier, second pair of AND gates, reversible binary counter, stack register, adder, output register, comparison circuit, summing counter, second precision relay element, second voltage-to-current converter. Elements introduced in both feedbacks resulted in creation of device into which basic and difference digital codes are formed in digital (pulse) feedback. The digital codes provide output of ripples digital data from output of reversible binary counter.

EFFECT: improved precision of measurement.

1 dwg

FIELD: possible use as sensitive element in stabilization, pointing and navigation systems, as well as in devices for measuring compensation-type mechanical values.

SUBSTANCE: device having two negative check connections, additionally has, in digital negative check connection, from output of reverse binary counter to input of second adding element - first stack register, second stack register, adder, additional inputs of which are outputs from reverse binary counter and from first and second stack registers, output register, comparison circuit, other input of which is connected to synchronization circuit through adding counter, second precision relay element, second voltage-current transformer. Additional inputs of low-digit reverse binary counter, low-digit final register, waiting synchronous generators, binary multiplier, reverse binary counter, output register and second precision relay element are connected to one of synchronization system outputs. Output from reverse binary counter is digital output of device. Insertion of two parallel negative check connection to device allows to make a device with increased precision with extended pass band, wherein given quality of transfer process is provided for by analog negative check connection, while extension of pass band is provided for by controlling precision relay element, by both main and difference signals from outputs of reverse binary counter and first and second stack register. Because digital negative check connection has low-digit reverse counter, low-digit final register, binary multiplier, matching circuits, reverse binary counter, first and second stack register, adder, output register of control circuit, adding counter, precision relay element, it is possible to make a device with decoupled transfer function K/S, stable under any K - amplification coefficient by open contour.

EFFECT: higher efficiency.

1 dwg

FIELD: the invention refers to measuring technique and may be used in the systems of stabilization, guidance and navigation.

SUBSTANCE: for achieving this given result the output of the transformer is connected with the second input of a synchronous JK-triggers through an inverter and the second emitter follower. The second input of a moment transducer is connected with the output of a precise relay element through a smoothing circuit of third order. The output of an asynchronous RS-trigger is connected along the information inputs with two schemes of coincidence to whose outputs are in-series connected a small discharge reversible binary scaler, a sum total register of the small discharge reversible binary scaler, a converter of digital information into a direct code, the first binary multiplier, a multi discharge reversible binary scaler.

EFFECT: increases accuracy.

1 dwg

FIELD: the invention refers to measuring technique and may be used in quality of a sensitive element in systems of stabilization, guidance and navigation.

SUBSTANCE: for achieving this given result a combined regenerative coupling is introduced into the arrangement. At that its positive component is introduced from the output of an amplifier to the input of a moments sensor through in-series connected along the information inputs a matching transformer and diode bridges, an adder , a filter of high frequencies, a voltage-current. converter. A negative regenerative coupling is introduced from the output of the amplifier to the input of the moments sensor, and negative intergrating regenerative coupling is introduced from the output of the amplifier to the input of the moments sensor, the first matching transformer, Schmitt's triggers and schemes of coincidence.

EFFECT: increases accuracy of measuring.

1 dwg

FIELD: railway transport; instruments.

SUBSTANCE: invention relates to methods of measuring parameters of running of rail trains and to measuring facilities, namely, to float-type compensated pendulum accelerometers with discrete output. According to proposed method, float-type pendulum accelerometer is installed on movable base and axis of sensitivity of accelerometer is aligned with direction of running, and output axis is set vertically, and then float-type suspension of sensing element of hydrostatic type is formed using zero floatability of sensing element. Discrete output signal of float-type pendulum accelerometer is formed and said signal is integrated and signal indicating value of movement of train is obtained. Moreover, output signal of accelerometer at movements of train at slopes and upgrades is corrected.

EFFECT: improved accuracy of measurement of parameter of translation of rail train owing to use of float-type pendulum accelerometer with discrete out6put and accelerometer signal correction circuit.

9 cl, 3 dwg

FIELD: engineering of measuring and micro-system equipment, in particular, of integration elements for measuring values of acceleration.

SUBSTANCE: integration micro-mechanical accelerometer based on tunneling effect contains substrate, immoveable electrode, inertial mass positioned with space relatively to immoveable electrode, moveable element positioned on inertial mass forming a tunneling contact with immoveable electrode and used as movements transformer, resilient beam which by one end is rigidly connected to inertial mass and by another end is rigidly held relatively to substrate. In accordance to invention, introduced to aforementioned device are: first area of isolating dielectric positioned below moveable electrode and separating it from the substrate, second area of isolating dielectric, positioned below immoveable electrode, metallic heating element, positioned above third area of isolating dielectric.

EFFECT: increased sensitivity and manufacturability.

4 dwg

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