CN111323008A - Micromechanical gyroscope POS geomagnetic measurement circuit - Google Patents
Micromechanical gyroscope POS geomagnetic measurement circuit Download PDFInfo
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- CN111323008A CN111323008A CN202010147112.5A CN202010147112A CN111323008A CN 111323008 A CN111323008 A CN 111323008A CN 202010147112 A CN202010147112 A CN 202010147112A CN 111323008 A CN111323008 A CN 111323008A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
- G01C21/10—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 by using measurements of speed or acceleration
- G01C21/12—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 by using measurements of speed or acceleration executed aboard the object being navigated; Dead reckoning
- G01C21/16—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 by using measurements of speed or acceleration executed aboard the object being navigated; Dead reckoning by integrating acceleration or speed, i.e. inertial navigation
- G01C21/165—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 by using measurements of speed or acceleration executed aboard the object being navigated; Dead reckoning by integrating acceleration or speed, i.e. inertial navigation combined with non-inertial navigation instruments
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
- G01C21/04—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 by terrestrial means
- G01C21/08—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 by terrestrial means involving use of the magnetic field of the earth
Abstract
The invention relates to a micromechanical gyroscope POS geomagnetic measurement circuit, which comprises: the device comprises a triaxial magnetometer, a signal amplification circuit, an AD conversion acquisition circuit, a voltage boosting pulse circuit, a magnetic sensor reset setting circuit and an SPI data communication circuit; adopt HMC1001/1002 list, biax to hinder the magnetic sensor and constitute triaxial magnetometer, design separately, the quadrature installation realizes triaxial magnetic field measurement, and the magnetic sensor resets the setting circuit and receives pulse signal and resets and set the triaxial magnetometer, guarantees that list/biax magnetic sensor does not receive external strong magnetic field interference to satisfy MPOS system acquisition data demand, realized the high accuracy measurement of position gesture.
Description
Technical Field
The invention relates to the technical field of inertial navigation, in particular to a micromechanical gyroscope POS geomagnetic measurement circuit which can be applied to a micromechanical POS system.
Background
The aviation earth observation system realizes the research in the important fields of aviation mapping, major natural disaster monitoring, meteorological hydrological detection and the like by acquiring high-resolution earth observation data; because the ground observation aircraft does not have ideal linear motion in the motion process and hardly meets the motion requirement of high-resolution aerial remote sensing, a high-precision Position and attitude measurement System (POS) is required to provide high-precision measurement data, and the high-resolution imaging requirement is realized;
with the continuous development of earth observation systems, the Micro remote sensing load System with low cost, high efficiency and high maneuverability gradually becomes a new research direction, compared with the traditional remote sensing load, the Micro remote sensing load System can meet the carrying application requirements of a small and light aviation platform, and the status in modern war is also gradually improved, so that the development and development of a Micro Position and attitude measurement System (MPOS) are urgently needed to meet the requirements of national defense and the market; at present, the development of the micro-miniature MPOS technology is very rapid, some products are successfully applied to the small unmanned aerial vehicle surveying and mapping project, the operation cost is greatly reduced, the surveying and mapping efficiency is improved, but the problem that the course angle cannot be accurately measured exists in the existing MPOS system technology, the defects in the technical aspect are not small, and the further development and application of the air-ground observation are restricted.
Disclosure of Invention
In order to solve the technical problem, the invention provides a micromechanical gyroscope POS geomagnetic measurement circuit, which solves the problem that an MPOS (multi-point-of-sale) system cannot accurately measure a course angle, meets the miniaturization requirement of the POS system, and realizes high-precision measurement of position and attitude.
A micromechanical gyroscope POS geomagnetic measurement circuit, comprising:
the device comprises a triaxial magnetometer, a signal amplification circuit, an AD conversion acquisition circuit, a voltage boosting pulse circuit, a magnetic sensor reset setting circuit and an SPI data communication circuit;
furthermore, one end of the triaxial magnetometer is electrically connected with one end of the signal amplification circuit, the other end of the signal amplification circuit is electrically connected with one end of the AD conversion acquisition circuit, and the other end of the AD conversion acquisition circuit is electrically connected with one end of the SPI data communication circuit; the other end of the three-axis magnetometer is electrically connected with one end of the magnetic sensor reset setting circuit, and the other end of the magnetic sensor reset setting circuit is electrically connected with one end of the voltage boosting pulse circuit; wherein:
the three-axis magnetometer is used for sensing the size of a magnetic field and outputting a corresponding voltage signal;
the signal amplifying circuit is used for amplifying the voltage signal and then outputting the amplified voltage signal;
the AD conversion acquisition circuit is used for converting the amplified voltage signal from an analog signal into a digital signal; meanwhile, the 5V power supply input voltage is boosted to 16-20V by the voltage boosting pulse circuit and can be adjusted, a pulse signal is provided for the magnetic sensor reset setting circuit, and the magnetic sensor reset setting circuit is ensured to receive the pulse signal so as to reset and set the triaxial magnetometer;
finally, the SPI data communication circuit sends the received signals to a processing system;
further, the three-axis magnetometer includes: the three-axis magnetic field measurement is realized through the discrete orthogonal design of the single-axis magnetoresistive sensor and the double-axis magnetoresistive sensor, the direction of a three-axis magnetometer is consistent with the direction of a gyroscope and a meter of the microminiature POS system, and the geomagnetic measurement requirement of the microminiature POS system can be met;
as an illustration, the single-axis magnetoresistive sensor employs: the HMC1001 magnetic resistance sensor is used for sensing a Z-axis direction magnetic field; an S/R pin of the HMC1001 magnetoresistive sensor can sense signals to carry out reset and set operations;
as an illustration, the dual-axis magnetoresistive sensor employs: the HMC1002 magnetoresistive sensor is used for sensing X, Y axial direction magnetic fields; an S/R pin of the HMC1002 magnetoresistive sensor can sense a signal to carry out reset and set operation;
further, the signal amplification circuit includes: three sets of amplifiers; each group of amplifiers can work independently, respectively amplify the three-axis voltage signals, and simultaneously increase the voltage of a basic axis (abscissa) from 0V to 2.048V, so that the signals acquired by the AD conversion acquisition circuit are all values of a positive half axis;
by way of illustration, each set of amplifiers employs AMP04F amplification chips;
further, the AD conversion acquisition circuit includes: the device comprises a 24-bit 4-channel single-ended acquisition chip ADS1220 and a peripheral protection circuit; acquiring and converting data through a clock sequence;
as an illustration, the acquisition range of the clock sequence for acquiring data is: 0 to 8388607;
further, the voltage boost pulse circuit includes: MAX662 chip and SS13 diodes; the input voltage is increased from 5V to 16-20V and is adjustable, and a pulse signal is sent;
further, the magnetic sensor reset-set circuit includes: an IRF7106 chip and a 2N3904 triode; after receiving the pulse signal, the triaxial magnetometer is reset or set through S/R current;
has the advantages that:
the HMC1001\1002 single-shaft and double-shaft resistance magnetic sensors are adopted to form the three-shaft magnetometer, the three-shaft magnetometer is designed separately and installed orthogonally, three-shaft magnetic field measurement is realized, the magnetic sensor reset and set circuit receives pulse signals to enable the three-shaft magnetometer to be reset and set, and the single-shaft and double-shaft magnetic sensors are guaranteed not to be interfered by an external strong magnetic field, so that the requirement of an MPOS system for acquiring data is met, and the high-precision measurement of position and posture is realized.
Drawings
Fig. 1 is a schematic diagram of an overall structure of a micromechanical gyroscope POS geomagnetic measurement circuit according to the present invention;
FIG. 2 is a schematic circuit diagram of a preferred embodiment 1 of a single-axis magnetoresistive sensor of a micromechanical gyroscope POS geomagnetic measurement circuit according to the present invention;
FIG. 3 is a schematic circuit diagram of a dual-axis magnetoresistive sensor according to a preferred embodiment 2 of the present invention;
fig. 4 is a schematic diagram of three amplifier circuits according to a preferred embodiment 3 of the micromechanical gyroscope POS geomagnetic measurement circuit of the present invention;
fig. 5 is a schematic diagram of an AD conversion acquisition circuit according to a preferred embodiment 4 of the micromechanical gyroscope POS geomagnetic measurement circuit of the present invention;
fig. 6 is a schematic diagram of a voltage boosting pulse circuit according to a preferred embodiment 5 of the micromechanical gyroscope POS geomagnetic measurement circuit of the present invention;
fig. 7 is a schematic diagram of a magnetic sensor reset setting circuit according to preferred embodiment 6 of a micromechanical gyroscope POS geomagnetic measurement circuit of the present invention;
Detailed Description
As shown in fig. 1 to 7, a micromechanical gyroscope POS geomagnetic measurement circuit includes:
the device comprises a three-axis magnetometer 101, a signal amplification circuit 102, an AD conversion acquisition circuit 103, a voltage boosting pulse circuit 104, a magnetic sensor reset setting circuit 105 and an SPI data communication circuit 106;
further, one end of the triaxial magnetometer 101 is electrically connected to one end of the signal amplification circuit 102, the other end of the signal amplification circuit 102 is electrically connected to one end of the AD conversion acquisition circuit 103, and the other end of the AD conversion acquisition circuit 103 is electrically connected to one end of the SPI data communication circuit 106; the other end of the three-axis magnetometer 101 is electrically connected with one end of the magnetic sensor reset setting circuit 105, and the other end of the magnetic sensor reset setting circuit 105 is electrically connected with one end of the voltage boosting pulse circuit 104; wherein:
the three-axis magnetometer 101 is used for sensing the size of a magnetic field and outputting a corresponding voltage signal;
the signal amplifying circuit 102 is configured to amplify and output the voltage signal;
the AD conversion acquisition circuit 103 is configured to convert the amplified voltage signal from an analog signal to a digital signal; meanwhile, the 5V power supply input voltage is boosted to 16-20V by the voltage boosting pulse circuit 104 and can be adjusted, a pulse signal is provided for the magnetic sensor reset setting circuit 105, and the magnetic sensor reset setting circuit 105 is ensured to receive the pulse signal so as to reset and set the three-axis magnetometer 101;
finally, the SPI data communication circuit 106 sends the received signal to a processing system;
further, the three-axis magnetometer 101 includes: the three-axis magnetic field measurement is realized through the discrete orthogonal design of the single-axis magnetoresistive sensor and the double-axis magnetoresistive sensor, the direction of a three-axis magnetometer is consistent with the direction of a gyroscope and a meter of the microminiature POS system, and the geomagnetic measurement requirement of the microminiature POS system can be met;
as an illustration, the single-axis magnetoresistive sensor employs: the HMC1001 magnetic resistance sensor is used for sensing a Z-axis direction magnetic field; an S/R pin of the HMC1001 magnetoresistive sensor can sense signals to carry out reset and set operations;
as an illustration, the dual-axis magnetoresistive sensor employs: the HMC1002 magnetoresistive sensor is used for sensing X, Y axial direction magnetic fields; an S/R pin of the HMC1002 magnetoresistive sensor can sense a signal to carry out reset and set operation;
further, the signal amplifying circuit 102 includes: three sets of amplifiers; each group of amplifiers can work independently, respectively amplify the three-axis voltage signals, and simultaneously increase the base axis voltage (abscissa) from 0V to 2.048V, so that the signals acquired by the AD conversion acquisition circuit are all values of a positive half axis;
by way of illustration, each set of amplifiers employs AMP04F amplification chips;
further, the AD conversion acquisition circuit 103 includes: the device comprises a 24-bit 4-channel single-ended acquisition chip ADS1220 and a peripheral protection circuit; acquiring and converting data through a clock sequence;
as an illustration, the acquisition range of the clock sequence for acquiring data is: 0 to 8388607;
further, the voltage boost pulse circuit 104 includes: MAX662 chip and SS13 diodes; the input voltage is increased from 5V to 16-20V and is adjustable, and a pulse signal is sent;
further, the magnetic sensor reset-set circuit 105 includes: an IRF7106 chip and a 2N3904 triode; after receiving the pulse signal, the triaxial magnetometer is reset or set through S/R current;
preferred embodiment 1:
the HMC1001 magnetoresistive sensor circuit is schematically wired, as shown in detail in fig. 2;
in the HMC1001 magnetoresistive sensor: the 4 pins of the connecting rod are grounded;
preferred embodiment 2:
the HMC1002 magnetoresistive sensor circuit is schematically wired, and is shown in detail in FIG. 3;
in the HMC1002 magnetoresistive sensor: pins 1, 6 and 18 are grounded after being connected in parallel; the 8 pin and the 13 pin are grounded after being connected in parallel; the pin 7 is grounded;
preferred embodiment 3:
three sets of amplifier circuit wiring diagrams, detailed in FIG. 4;
the operational connection relations of each group of amplifiers are the same, for example, the connection relations of one group of amplifiers are illustrated;
AMP04F disposed above amplifies in the chip: one end of the pin 1 is electrically connected with one end of the resistor R14, and the other end of the resistor R14 is electrically connected with the pin 8; one end of the pin 2 is electrically connected with one end of the resistor R16, and the other end of the resistor R16 is connected with 5V high level; one end of the pin 3 is electrically connected with one end of the resistor R17, and the other end of the resistor R17 is electrically connected with the pin 4 and then grounded; one end of the pin 8 is electrically connected with one end of the capacitor C6, and the other end of the capacitor C6 is electrically connected with the pin 6; pin 7 is connected with 5V high level;
preferred embodiment 4:
the schematic diagram of the AD conversion acquisition circuit, shown in detail in fig. 5, includes: the device comprises a 24-bit 4-channel single-ended acquisition chip ADS1220 and a peripheral protection circuit;
in the 24-bit 4-channel single-ended acquisition chip ADS 1220: 3. pins 4, 5 and 8 are grounded; one end of the pin 6 is electrically connected with one end of the resistor R3 and one end of the capacitor C10 respectively; one end of the pin 7 is electrically connected with one end of the resistor R4 and one end of the capacitor C9 respectively; the capacitor C9 is electrically connected with the 8 pin after being short-circuited with the other end of the capacitor C10, the 8 pin is also electrically connected with one end of the capacitor C12, the other end of the capacitor C12 is electrically connected with the 9 pin, the 10 pin is respectively electrically connected with one end of the resistor R5 and one end of the capacitor C11, and the other end of the capacitor C11 is grounded; pin 12 is connected with 5V high level; one end of the 14 pin is electrically connected with one end of the resistor R15, and the other end of the resistor R15 is electrically connected with the 13 pin and then connected with 5V high level;
preferred embodiment 5:
the voltage boost pulse circuit, as shown in detail in fig. 6, includes: MAX662 chip and SS13 diodes;
in the MAX662 chip: one end of the pin 1 is electrically connected with one end of a capacitor C29, and the other end of the capacitor C29 is electrically connected with the pin 2; one end of the pin 3 is electrically connected with one end of the capacitor C34, and the other end of the capacitor C34 is electrically connected with the pin 4; the 4 pin is also electrically connected with one end of a capacitor C35, and the other end of the capacitor C35 is electrically connected with the cathode of a diode D2; pin 5 is connected with 5V high level; the pin 6 is electrically connected with the anode of the diode D2, the cathode of the diode D2 is also electrically connected with the anode of the diode D3, and the cathode of the diode D3 is connected with the high level of 20V; 7. the pin 8 is grounded;
preferred embodiment 6:
the schematic diagram of the magnetic sensor reset-set circuit, shown in detail in fig. 7, includes: an IRF7106 chip and a 2N3904 triode;
in the IRF7106 chip: 1, grounding a pin; 2 pins output an S/R current signal 0; the pin 3 is respectively and electrically connected with one end of the capacitor C28, one end of the resistor R8 and one end of the resistor R9; the other end of the capacitor C28 is grounded; the 4 pins are respectively and electrically connected with the other end of the resistor R9 and one end of the capacitor C17, and the other end of the capacitor C17 is respectively and electrically connected with the other end of the resistor R8 and the collector of the triode Q1; the emitter of the triode Q1 is grounded; the base electrode of the triode Q1 is electrically connected with one end of the resistor R10, and the other end of the resistor R10 is used for outputting an S/R current signal 1 (the S/R current signal 0/1 corresponds to an S/R signal of the double-shaft magnetic sensor); 5. pins 6, 7 and 8 are connected in parallel and then electrically connected with one end of a capacitor C18, and the other end of the capacitor C18 outputs an S/RC + current signal. (S/RC + Current Signal corresponds to Single-axis magnetic sensor S/R Signal)
The HMC1001/1002 single-shaft and double-shaft resistance magnetic sensors are adopted to form the three-shaft magnetometer, the three-shaft magnetometer is designed separately and installed orthogonally, three-shaft magnetic field measurement is realized, the magnetic sensor reset setting circuit receives pulse signals to reset and set the three-shaft magnetometer, and the single-shaft and double-shaft magnetic sensors are guaranteed not to be interfered by an external strong magnetic field, so that the requirement of an MPOS system on data acquisition is met, and the high-precision measurement of the position posture is realized.
The disclosure above is only one specific embodiment of the present application, but the present application is not limited thereto, and any variations that can be made by those skilled in the art are intended to fall within the scope of the present application.
Claims (10)
1. A micromechanical gyroscope POS geomagnetic measurement circuit is characterized by comprising:
the device comprises a triaxial magnetometer, a signal amplification circuit, an AD conversion acquisition circuit, a voltage boosting pulse circuit, a magnetic sensor reset setting circuit and an SPI data communication circuit;
one end of the triaxial magnetometer is electrically connected with one end of the signal amplification circuit, the other end of the signal amplification circuit is electrically connected with one end of the AD conversion acquisition circuit, and the other end of the AD conversion acquisition circuit is electrically connected with one end of the SPI data communication circuit; the other end of the triaxial magnetometer is electrically connected with one end of the magnetic sensor reset setting circuit, and the other end of the magnetic sensor reset setting circuit is electrically connected with one end of the voltage boosting pulse circuit.
2. The micromechanical gyroscope POS geomagnetic measurement circuit according to claim 1, wherein the triaxial magnetometer is configured to sense a magnitude of a magnetic field and output a corresponding voltage signal; the signal amplifying circuit is used for amplifying the voltage signal and then outputting the amplified voltage signal; the AD conversion acquisition circuit is used for converting the amplified voltage signal from an analog signal into a digital signal; meanwhile, the 5V power supply input voltage is boosted to 16-20V by the voltage boosting pulse circuit and can be adjusted, a pulse signal is provided for the magnetic sensor reset setting circuit, and the magnetic sensor reset setting circuit is ensured to receive the pulse signal so as to reset and set the triaxial magnetometer; and the SPI data communication circuit sends the received signals to a processing system.
3. The micromechanical gyroscope-POS geomagnetic measurement circuit according to claim 1, wherein the three-axis magnetometer comprises: a unipolar magnetoresistive sensor and a biax magnetoresistive sensor realize that the triaxial magnetic field is measured through unipolar magnetoresistive sensor, biax magnetoresistive sensor discrete orthogonal design, and triaxial magnetometer direction is unanimous with microminiature POS system top plus the count direction, can satisfy microminiature POS system's earth magnetism measurement demand.
4. The micromechanical gyroscope POS geomagnetic measurement circuit according to claim 3, wherein the single-axis magnetoresistive sensor adopts: the HMC1001 magnetic resistance sensor is used for sensing a Z-axis direction magnetic field; an S/R pin of the HMC1001 magnetoresistive sensor can sense signals to carry out reset and set operations; the dual-axis magnetoresistive sensor employs: the HMC1002 magnetoresistive sensor is used for sensing X, Y axial direction magnetic fields; an S/R pin of the HMC1002 magnetoresistive sensor can be sensitive to signals to carry out reset and set operations, and in the HMC1001 magnetoresistive sensor: the 4 pins of the connecting rod are grounded; in the HMC1002 magnetoresistive sensor: pins 1, 6 and 18 are grounded after being connected in parallel; the 8 pin and the 13 pin are grounded after being connected in parallel; the pin 7 is grounded.
5. The micromechanical gyroscope-POS geomagnetic measurement circuit according to claim 1, wherein the signal amplification circuit comprises: three sets of amplifiers; each group of amplifiers can work independently, the triaxial voltage signals are amplified respectively, the base shaft voltage is increased to 2.048V from 0V, the signals acquired by the AD conversion acquisition circuit are guaranteed to be numerical values of a positive half shaft, and the working connection relations of each group of amplifiers are the same.
6. The micromechanical gyroscope POS geomagnetic measurement circuit according to claim 5, wherein each group of amplifiers adopts an AMP04F amplification chip, and in the AMP04F amplification chip arranged above the AMP04F amplification chip: one end of the pin 1 is electrically connected with one end of the resistor R14, and the other end of the resistor R14 is electrically connected with the pin 8; one end of the pin 2 is electrically connected with one end of the resistor R16, and the other end of the resistor R16 is connected with 5V high level; one end of the pin 3 is electrically connected with one end of the resistor R17, and the other end of the resistor R17 is electrically connected with the pin 4 and then grounded; one end of the pin 8 is electrically connected with one end of the capacitor C6, and the other end of the capacitor C6 is electrically connected with the pin 6; pin 7 is connected to 5V high level.
7. The micromechanical gyroscope POS geomagnetic measurement circuit according to claim 1, wherein the AD conversion acquisition circuit comprises: the device comprises a 24-bit 4-channel single-ended acquisition chip ADS1220 and a peripheral protection circuit; acquiring and converting data through a clock sequence; the clock sequence collects data in the following collection range: 0 ~ 8388607, among the 24 single-ended collection chips ADS1220 of 4 passageway on the position: 3. pins 4, 5 and 8 are grounded; one end of the pin 6 is electrically connected with one end of the resistor R3 and one end of the capacitor C10 respectively; one end of the pin 7 is electrically connected with one end of the resistor R4 and one end of the capacitor C9 respectively; the capacitor C9 is electrically connected with the 8 pin after being short-circuited with the other end of the capacitor C10, the 8 pin is also electrically connected with one end of the capacitor C12, the other end of the capacitor C12 is electrically connected with the 9 pin, the 10 pin is respectively electrically connected with one end of the resistor R5 and one end of the capacitor C11, and the other end of the capacitor C11 is grounded; pin 12 is connected with 5V high level; one end of the pin 14 is electrically connected with one end of the resistor R15, and the other end of the resistor R15 is electrically connected with the pin 13 and then connected with 5V high level.
8. The micromechanical gyroscope POS geomagnetic measurement circuit according to claim 1, wherein the voltage boost pulse circuit comprises: MAX662 chip and SS13 diodes; the MAX662 chip is used for raising the input voltage from 5V to 16-20V and is adjustable, and sending a pulse signal, wherein: one end of the pin 1 is electrically connected with one end of a capacitor C29, and the other end of the capacitor C29 is electrically connected with the pin 2; one end of the pin 3 is electrically connected with one end of the capacitor C34, and the other end of the capacitor C34 is electrically connected with the pin 4; the 4 pin is also electrically connected with one end of a capacitor C35, and the other end of the capacitor C35 is electrically connected with the cathode of a diode D2; pin 5 is connected with 5V high level; the pin 6 is electrically connected with the anode of the diode D2, the cathode of the diode D2 is also electrically connected with the anode of the diode D3, and the cathode of the diode D3 is connected with the high level of 20V; 7. the 8 pins are grounded.
9. The micromechanical gyroscope POS geomagnetic measurement circuit according to claim 1, wherein the magnetic sensor reset-set circuit comprises: an IRF7106 chip and a 2N3904 triode; after receiving a pulse signal, the three-axis magnetometer is reset or set through S/R current, and in the IRF7106 chip: 1, grounding a pin; 2 pins output an S/R current signal 0; the pin 3 is respectively and electrically connected with one end of the capacitor C28, one end of the resistor R8 and one end of the resistor R9; the other end of the capacitor C28 is grounded; the 4 pins are respectively and electrically connected with the other end of the resistor R9 and one end of the capacitor C17, and the other end of the capacitor C17 is respectively and electrically connected with the other end of the resistor R8 and the collector of the triode Q1; the emitter of the triode Q1 is grounded; the base electrode of the triode Q1 is electrically connected with one end of the resistor R10, and the other end of the resistor R10 is used for outputting an S/R current signal 1; 5. pins 6, 7 and 8 are connected in parallel and then electrically connected with one end of a capacitor 18, and the other end of the capacitor C18 outputs an S/RC + current signal.
10. The micromechanical gyroscope POS geomagnetic measurement circuit according to claim 9, wherein 0 and 1 of the S/R current signal correspond to an S/R signal of a biaxial magnetic sensor, and the S/RC + current signal corresponds to an S/R signal of a uniaxial magnetic sensor.
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Application publication date: 20200623 |