CN107357248B - Inertial navigation device and system - Google Patents
Inertial navigation device and system Download PDFInfo
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- CN107357248B CN107357248B CN201710594351.3A CN201710594351A CN107357248B CN 107357248 B CN107357248 B CN 107357248B CN 201710594351 A CN201710594351 A CN 201710594351A CN 107357248 B CN107357248 B CN 107357248B
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
- G05B19/054—Input/output
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/10—Plc systems
- G05B2219/11—Plc I-O input output
- G05B2219/1103—Special, intelligent I-O processor, also plc can only access via processor
Abstract
The invention provides an inertial navigation device and an inertial navigation system, and belongs to the field of inertial navigation. The device comprises a bottom plate, wherein a data measurement module, a data output module, a power isolation module and a signal isolation module are arranged on the bottom plate, the power isolation module is used for supplying power to the data measurement module, the data output module and the signal isolation module respectively, the power isolation module is used for supplying power to the data measurement module and the data output module through a flyback transformer, and the signal isolation module is used for carrying out electric isolation transmission on signal transmission between the data measurement module and the data output module, so that the data measurement module and the data output module are protected from being damaged or incapable of working normally due to overlarge input voltage caused by external interference.
Description
Technical Field
The invention relates to the field of inertial navigation, in particular to an inertial navigation device and system.
Background
Among the high-precision sensors, particularly those performing physical measurement, MEMS chips such as accelerometers, tri-axial gyroscopes, etc., rely on a power supply to provide power thereto and rely on an electrical signal to output outwardly. The power supply has a power line and a ground line, and the electrical signal has a signal line and a ground line, which are all electrical connections between the sensor and the external interface. In this way, in an external complex electromagnetic environment, in particular an environment with high-voltage power transmission, it is possible to interfere with the electrical connection by these electromagnetic environments and there is a possibility of damaging the chip.
For example, in extreme environments, all components within the inertial navigation system may interfere or be damaged due to possible electromagnetic disturbances and pulses entering from ground. Because the ground wire is uniform (zero potential) in the general circuit design, and all electronic components are connected to comprise the measuring component, if electromagnetic disturbance and pulse enter from the ground wire, the ground wire is not zero potential, but has a relatively large fluctuation, in extreme cases, static electricity release can reach up to kilovolts instantaneously, and enter the inertial navigation measuring component, which not only affects the measuring effect, but also interferes with the measured data, and in extreme cases, damages the chip. In addition, there is a possibility that disturbance of the data line or the power line may occur due to electromagnetic disturbance and impulse disturbance, and then failure or damage of the inertial navigation measurement unit may also occur.
Disclosure of Invention
The present invention aims to provide an inertial navigation device and system which can improve the above problems.
Embodiments of the present invention are implemented as follows:
the inertial navigation device comprises a bottom plate, wherein a data measurement module, a data output module, a power isolation module and a signal isolation module are arranged on the bottom plate, and the data measurement module and the data output module are arranged on the bottom plate through electrical isolation so as to form an isolation belt between the data measurement module and the data output module; the power isolation module is used for respectively supplying power to the data measurement module, the data output module and the signal isolation module, and the power isolation module is used for carrying out isolation power supply on the data measurement module and the data output module through a flyback transformer; the data measurement module is used for acquiring various parameter values of the carrier and sending the various parameter values of the carrier to the data output module through the signal isolation module; the signal isolation module is used for carrying out electric isolation transmission on signal transmission between the data measurement module and the data output module; the data output module is used for outputting the acquired parameter values of the carrier.
In a preferred embodiment of the present invention, the signal isolation module includes at least one coupler, and the at least one coupler is coupled to the data measurement module, the data output module, and the power isolation module, respectively.
In a preferred embodiment of the invention, the at least one coupler is an optical coupler.
In a preferred embodiment of the invention, the at least one coupler is a magnetic coupler.
In a preferred embodiment of the present invention, the signal isolation module includes four magnetic couplers, each two magnetic couplers are disposed on two sides of the isolation strip on the bottom plate, two magnetic couplers on one side of the isolation strip are coupled with the data output module, and two magnetic couplers on the other side of the isolation strip are coupled with the data measurement module.
In a preferred embodiment of the present invention, the power isolation module is divided into a first power isolation module and a second power isolation module on the bottom plate, and the first power isolation module is respectively disposed at two sides of the isolation belt, and supplies power to the data output module and two magnetic couplers at one side of the isolation belt, and the second power isolation module supplies power to the data measurement module and two magnetic couplers at the other side of the isolation belt.
In a preferred embodiment of the present invention, the data measurement module includes a measurement module, a signal processing module, and a control module; the measuring module is coupled with the signal processing module, the signal processing module is coupled with the control module, the control module is coupled with the signal isolation module, the second power isolation module is respectively coupled with the measuring module, the signal processing module and the control module, and the control module is coupled with two couplers at the other side of the isolation belt; the measuring module is used for measuring various parameter values of the carrier; the signal processing module is used for acquiring various parameter values of the carrier; the control module is used for sending a data acquisition command to the signal processing module so as to acquire the current position of the carrier after processing the acquired parameter values, and outputting the current position of the carrier through the signal isolation module in a corresponding format.
In a preferred embodiment of the present invention, the data output module is configured to be coupled to an external plug and to an external power source for connection to the external plug, so that the current position of the carrier is output through the external plug, and the data output module includes a communication interface module and a protection module, where the communication interface module and the protection module are both coupled to two couplers on one side of the isolation belt, the protection module is configured to perform overvoltage protection on the inertial navigation device, the communication interface module is configured to output the current position of the carrier through the external plug, and the external power source is coupled to the first power isolation module.
In a preferred embodiment of the present invention, a rectifying diode is connected between the external power source and the first power source isolation module, a cathode of the rectifying diode is coupled to the external power source, and an anode of the rectifying diode is coupled to the first power source isolation module.
An inertial navigation system, the system including display device and inertial navigation device, display device pass through the plug with inertial navigation device coupling, display device is used for showing the current position of the carrier that inertial navigation device acquireed.
The embodiment of the invention has the beneficial effects that:
the embodiment of the invention provides an inertial navigation device and a system, which are characterized in that a power isolation module is used for respectively supplying power to a data measurement module, a data output module and a signal isolation module, the power isolation module is used for carrying out isolated power supply on the data measurement module and the data output module through a flyback transformer, and the signal isolation module is used for carrying out electric isolated transmission on signal transmission between the data measurement module and the data output module, so that the data measurement module and the data output module are protected from damage or abnormal working caused by overlarge input voltage due to external interference.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of an inertial navigation device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another inertial navigation device according to an embodiment of the present invention;
FIG. 3 is a block diagram of a power isolation module according to an embodiment of the present invention;
FIG. 4 is a schematic circuit diagram of a power isolation module according to an embodiment of the present invention;
fig. 5 is a block diagram of an inertial navigation system according to an embodiment of the present invention.
Icon: 200-an inertial navigation system; 210-a display device; 100-inertial navigation device; 10-a bottom plate; 110-a power isolation module; a 111-input circuit; 112-a switch control circuit; 1122-a first protection circuit; 1124-pulse generation circuitry; 1126-a second protection circuit; 113-a switching circuit; 114-a feedback circuit; 115-flyback transformer; 116-an output circuit; 120-a data measurement module; 122-a measurement module; 124-a signal processing module; 126-a control module; 130-a signal isolation module; 132-a magnetic coupler; 140-a data output module; 142-an interface module; 144-protection module.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "coupled," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the embodiments of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims thereof as well as the appended drawings.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an inertial navigation device 100 according to an embodiment of the present invention, the inertial navigation device 100 includes a base plate 10, a data measurement module 120, a data output module 140, a power isolation module 110 and a signal isolation module 130 are disposed on the base plate 10, and the data measurement module 120 and the data output module 140 are disposed on the base plate 10 by electrical isolation, so that an isolation belt is formed between the data measurement module 120 and the data output module 140.
The power isolation module 110 is configured to supply power to the data measurement module 120, the data output module 140, and the signal isolation module 130, respectively, and the power isolation module 110 is configured to supply power to the data measurement module 120 and the data output module 140 separately through a flyback transformer (not shown).
The data measurement module 120 is configured to obtain various parameter values of a carrier, and send the various parameter values of the carrier to the data output module 140 through the signal isolation module 130.
The signal isolation module 130 is configured to electrically isolate the signal transmission between the data measurement module 120 and the data output module 140.
The data output module 140 is configured to output the obtained parameter values of the carrier.
Referring to fig. 2, fig. 2 is a schematic structural diagram of another inertial navigation device 100 according to an embodiment of the present invention, and a signal isolation module 130 includes at least one coupler, where the at least one coupler is respectively coupled to the data measurement module 120, the data output module 140, and the power isolation module 110.
The input and output of the signal are transmitted through the coupler, so that an isolation belt can be manufactured, the key point of the isolation belt is that the circuit board is prevented from wiring and copper distribution in the area, wherein the width of the isolation belt determines the high voltage resistance level, and the wider the isolation belt is, the stronger the high voltage resistance capability is.
As a way, the at least one coupler is an optical coupler or a magnetic coupler 132, in this embodiment, in order to meet the requirements of the vehicle standard circuit, the coupler is a magnetic coupler 132, the magnetic coupler 132 does not attenuate like the optical coupler, and the signal transmission rate and the voltage protection level are higher, so that the vehicle standard circuit is more suitable for vehicle standard protection.
For reliability and efficiency of signal transmission, the signal isolation module 130 in this embodiment includes four magnetic couplers 132, each two magnetic couplers 132 are disposed on two sides of the isolation strip on the base plate 10, two magnetic couplers 132 on one side of the isolation strip are coupled with the data output module 140, and two magnetic couplers 132 on the other side of the isolation strip are coupled with the data measurement module 120.
The power isolation module 110 is divided into a first power isolation module and a second power isolation module on the base plate 10, and the first power isolation module is respectively arranged at two sides of the isolation belt, the first power isolation module supplies power to the data output module 140 and two magnetic couplers 132 at one side of the isolation belt, and the second power isolation module supplies power to the data measurement module 120 and two magnetic couplers 132 at the other side of the isolation belt.
The power isolation module 110 is a flyback power supply, and is isolated by forming an isolation belt through a flyback transformer, so that the data measurement module 120 and the data output module 140 are electrically isolated and powered by forming the isolation belt on the base plate 10 through the power isolation module 110 and the signal isolation module 130, and the data measurement module 120 and the data output module 140 are protected from damage or abnormal working caused by overlarge input voltage due to external interference.
The data measurement module 120 includes a measurement module 122, a signal processing module 124, and a control module 126, where the measurement module 122 is coupled to the signal processing module 124, the signal processing module 124 is coupled to the control module 126, the control module 126 is coupled to the signal isolation module 130, the second power isolation module is coupled to the measurement module 122, the signal processing module 124, and the control module 126 is coupled to two couplers on the other side of the isolation belt.
The measurement module 122 is configured to measure various parameter values of the carrier, and includes a plurality of sensors, for example, MEMS (Micro-Electro-Mechanical System ) chips such as an accelerometer and a tri-axial gyroscope, where the accelerometer is configured to obtain an acceleration of the moving carrier in inertial navigation, and the tri-axial gyroscope is configured to obtain a movement angle of the moving carrier, so as to obtain a current position of the moving carrier, thereby performing route planning and navigation.
The signal processing module 124 is configured to obtain values of various parameters of the carrier, that is, data measured by a plurality of sensors in the measuring module 122 can be obtained at the same time, and the collected data are transmitted to the control module 126, where the signal processing module 124 can use signal processing devices such as a CPLD or an FPGA.
The connection between the signal processing module 124 and the measurement module 122 uses an SPI connection.
The control module 126 is configured to send a data acquisition command to the signal processing module 124, so as to process the obtained parameter values to obtain the current position of the carrier, and output the current position of the carrier in a corresponding format through the signal isolation module 130. The connection between the control module 126 and the signal isolation module 130 adopts CANBUS connection, so that the parameter values transmitted by the signal processing module 124 need to be converted into a format conforming to CANBUS transmission, and output to the signal isolation module 130, that is, a coupler, and then transmitted to the data output module 140 through the coupler.
As one approach, the control module 126 may be an integrated circuit chip with signal processing capabilities. The processor may be a general-purpose processor, including a central processing unit (Central Processing Unit, CPU for short), a network processor (Network Processor, NP for short), etc.; but may also be a Digital Signal Processor (DSP), application Specific Integrated Circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components. The disclosed methods, steps, and logic blocks in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The second power isolation module also supplies power to the measurement module 122, the signal processing module 124 and the control module 126 by connecting an LDO linear regulated power supply for overvoltage protection.
The data output module 140 is configured to couple with an external plug and couple with an external power supply for connection to the external plug, so that the current position of the carrier is output through the external plug, the data output module 140 includes a communication interface module 142 and a protection module 144, the communication interface module 142 and the protection module 144 are both coupled with two couplers on one side of the isolation belt, the protection module 144 is configured to perform overvoltage protection on the inertial navigation device 100, the communication interface module 142 is configured to output the current position of the carrier through the external plug, and the external power supply is coupled with the first power isolation module.
The communication interface module 142 adopts a GPIO interface and an RSS422 interface for outputting data, and of course, in order to prevent the voltage input through the interface from being too high or too low, the protection module 144 is used for protecting the interface, so that an ESD (Electro-Static discharge) protection device can be added to the GPIO interface, where the ESD device generally includes a TVS, a zener diode, a blocking diode (such as BAV 99), a sub-resistor, and the like, and a protection resistor and a buffer can be added. The RSS422 interface is additionally connected with the RSS422 differential chip, and the interface adopts a differential transmission mode, so that in order to prevent the damage of transient high voltage to the interface and effectively isolate the mutual interference among all modules, the transient high voltage can be transferred to an electric isolation layer in the isolation interface, namely a coupler, and the damage of surges and static electricity to the interface can be effectively prevented because a surge circuit with damage is not generated due to the high insulativity of the isolation layer.
In addition, the data output module 140 further includes a CANBUS driver chip for driving the CANBUS system in the device to work.
In order to further protect the power input into the inertial navigation device 100 from backflow, a rectifier diode is connected between the external power and the first power isolation module, the cathode of the rectifier diode is coupled with the external power, and the anode of the rectifier diode is coupled with the first power isolation module.
In addition, referring to fig. 3, fig. 3 is a block diagram of a power isolation module 110 according to an embodiment of the present invention, where the power isolation module 110 includes an input circuit 111, a switch control circuit 112, a feedback circuit 114, a switch circuit 113, a flyback transformer 115, and an output circuit 116, the input circuit 111 is coupled to the flyback transformer 115, the input circuit 111 is coupled to the switch control circuit 112, the switch control circuit 112 is coupled to the switch circuit 113, the feedback circuit 114 is coupled to the switch control circuit 112, the switch circuit 113 is coupled to the flyback transformer 115, the feedback circuit 114 is coupled to the flyback transformer 115, the flyback transformer 115 is coupled to the output circuit 116, and the output circuit 116 is coupled to the data measurement module 120 and the data output module 140.
The input circuit 111 is used for inputting a supply voltage of an external power supply.
The switch control circuit 112 is configured to control on/off of the switch circuit 113 to control on time of the flyback transformer 115.
The feedback circuit 114 is configured to detect an output voltage of the inertial navigation device 100.
The flyback transformer 115 is configured to perform flyback transformation on the power supply voltage input by the input circuit 111.
The output circuit 116 is configured to output the voltage output by the flyback transformer 115 to the data measurement module 120 and the data output module 140.
Referring to fig. 4, fig. 4 is a schematic circuit diagram of a power isolation module 110 according to an embodiment of the present invention, the switch control circuit 112 includes a first protection circuit 1122, a pulse generating circuit 1124 and a second protection circuit 1126, the pulse generating circuit 1124 is coupled to the first protection circuit 1122, the pulse generating circuit 1124 is coupled to the second protection circuit 1126, the second protection circuit 1126 is coupled to the switch circuit 113, the first protection circuit 1122 is coupled to the feedback circuit 114, and the pulse generating circuit 1124 is further coupled to the input circuit 111.
The pulse generating circuit 1124 is configured to generate a pulse signal to output to the second protection circuit 1126, and is further configured to control the on/off of the switching circuit 113 to control the on time of the flyback transformer 115. The pulse generating circuit 1124 includes a control chip U1, a first capacitor C1, and a second capacitor C2, wherein one end of the first capacitor C1 is coupled to a first port REF of the control chip U1, one end of the second capacitor C2 is coupled to a second port VCC of the control chip U1, the other end of the first capacitor C1 is coupled to the other end of the second capacitor C2 and grounded, and the control chip U1 is further coupled to the first protection circuit 1122 and the second protection circuit 1126.
The first protection circuit 1122 is configured to perform filtering protection on the control chip U1, where the first protection circuit 1122 includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a third capacitor C3, a fourth capacitor C4, and a fifth capacitor C5, where the third port COMP of the control chip U1 is coupled to one end of the third capacitor C3 and one end of the first resistor R1, the other end of the third capacitor C3 is coupled to the other end of the first resistor R1, and is coupled to one end of the second resistor R2, one end of the second resistor R2 is coupled to a fourth port FB of the control chip U1, the other end of the second resistor R2 is coupled to the feedback circuit 114, one end of the second resistor R2 is further coupled to one end of the third resistor R3, the other end of the third resistor R3 is coupled to one end of the fourth capacitor C4 and grounded, the other end of the fourth resistor C4 is coupled to one end of the fourth capacitor C4, the other end of the fourth resistor C4 is coupled to the fifth port FB of the control chip U1, the other end of the fifth resistor R5 is coupled to the fifth resistor C5, and the other end of the fourth resistor R1 is coupled to the fifth resistor C5.
The second protection circuit 1126 includes a sixth resistor R6, a seventh resistor R7, a first diode D1, and a second diode D2, where one end of the sixth resistor R6 is coupled to the seventh port OUT of the control chip U1, the eighth port GND of the control chip U1 is grounded, the other end of the sixth resistor R6 is respectively coupled to one end of the seventh resistor R7, the cathode of the first diode D1 and the cathode of the second diode D2, and the other end of the seventh resistor R7, the anode of the first diode D1, and the anode of the second diode D2 are all coupled to the switch circuit 113.
The first port REF of the control chip U1 is a reference voltage pin and is used for outputting reference voltage; the second port VCC of the control chip U1 is a power supply pin and is used for collecting the voltage of an input power supply; the third port COMP of the control chip U1 is a power supply pin and is a current compensation control pin, and the third capacitor C3 is a compensation capacitor and is used for regulating voltage stabilization so as to output stabilized voltage; the fourth port FB of the control chip U1 is a feedback pin, and is configured to collect the voltage output by the flyback transformer 115; the fifth port CS of the control chip U1 is a chip selection signal pin, the pin is pulled high to indicate that the control chip U1 is in a working state, and pulled low to indicate that the control chip U1 is in a non-working state; the seventh port OUT of the control chip U1 is a grounding pin; the eighth port GND of the control chip U1 is an output pin, and may be used for outputting a pulse signal.
As one way, the control chip U1 may be a UCC2813D chip.
The switching circuit 113 includes an eighth resistor R8, a ninth resistor R9, a third diode D3, a sixth capacitor C6, and a field-effect transistor Q1, where a base of the field-effect transistor Q1 is coupled to the switching control circuit 112, a drain of the field-effect transistor Q1 is coupled to a cathode of the third diode D3, one end of the ninth resistor R9, and a first primary winding of the flyback transformer 115, a source of the field-effect transistor Q1 is coupled to one end of the eighth resistor R8 and the other end of the fourth resistor R4, the other end of the eighth resistor R8 is coupled to the input circuit 111 and one end of the sixth capacitor C6, and the other end of the sixth capacitor C6 is coupled to an anode of the third diode and the other end of the ninth resistor R9.
The control chip U1 may output a pulse signal like the switching circuit 113, and when detecting that the input circuit 111 does not output a voltage, output a low level signal that controls the switching of the field effect transistor Q1 so as to turn off the flyback transformer 115 and not output power to the data measurement module 120 and the data output module 140.
The feedback circuit 114 is configured to, when detecting that the output voltage of the flyback transformer 115 is too high or too low, feed back the voltage to the control chip U1, so that the control chip U1 can re-control the output voltage of the flyback transformer 115 according to the feedback signal. The feedback circuit 114 includes a tenth resistor R10, a seventh capacitor C7, and a fourth diode D4, wherein one end of the tenth resistor R10 is coupled to the switch control circuit 112, the other end of the tenth resistor R10 is coupled to the second primary winding of the flyback transformer 115, one end of the seventh capacitor C7 is coupled to the ground, the cathode of the fourth diode D4 is coupled to one end of the tenth resistor R10 and the other end of the seventh capacitor C7, and the anode of the fourth diode D4 is coupled to the second primary winding of the flyback transformer 115.
The input circuit 111 is configured to rectify and filter an input voltage of an external power supply, where the input circuit 111 includes an eleventh resistor R11, a fifth diode D5, a first inductor L1, an eighth capacitor C8, a ninth capacitor C9, a tenth capacitor C10, and an eleventh capacitor C11, one end of the eleventh resistor R11 is coupled to the external power supply and one end of the first inductor L1, the other end of the eleventh resistor R11 is coupled to a cathode of the fifth diode D5, an anode of the fifth diode D5 is grounded, and the other end of the first inductor L1 is coupled to one end of the eighth capacitor C8, one end of the ninth capacitor C9, one end of the tenth capacitor C10, one end of the eleventh capacitor C11, the flyback transformer 115, and the other end of the eighth capacitor C8, the other end of the ninth capacitor C9, the other end of the tenth capacitor C10, and the other end of the eleventh capacitor C11 are all coupled to the external power supply.
The output circuit 116 performs flyback transformation on the power supply voltage input by the input circuit 111 and outputs the power supply voltage to the data measurement module 120 and the data output module 140 through the flyback transformer 115, the output circuit 116 includes a sixth diode D6, a twelfth capacitor C12, a thirteenth capacitor C13, a fourteenth capacitor C14 and a voltage stabilizing chip U2, one end of the sixth diode D6 is coupled with the secondary winding of the flyback transformer 115, the other end of the twelfth capacitor C12 is coupled with the cathode of the sixth diode D6 and connected with the voltage stabilizing chip U2 in parallel, two ends of the thirteenth capacitor C13 are coupled with the voltage stabilizing chip U2, the output end of the voltage stabilizing chip U2 is coupled with one end of the fourteenth capacitor C14, the other end of the fourteenth capacitor C14 is grounded, and the output end of the voltage stabilizing chip U2 is coupled with the data measurement module 120 and the data output module 140.
The voltage stabilizing chip U2 can be a chip with the model number TPS 70933.
In the case where the field effect transistor Q1 is closed, the first inductor L1 is in a discharge state when the input is in a high level, so that the data measurement module 120 and the data output module 140 can output voltages, and in the case where the field effect transistor Q1 is open, the first inductor L1 is in a charge state when the input is in a high level.
In addition, in order to improve the applicability of the power isolation module 110, the power isolation module 110 may be provided with a multiplexing circuit for supplying power to other power utilization modules, respectively.
It should be noted that, on the base plate 10, the first power isolation module includes an input circuit 111, a switch control circuit 112, a feedback circuit 114, and a switch circuit 113, the flyback transformer 115 is used to form an isolation strip, and the second power isolation module includes an output circuit 116.
Therefore, in the inertial navigation device 100, in order to avoid the damage of the data measurement module 120 and the data output module 140 in the inertial navigation device 100 caused by the input voltage due to environmental reasons, in this embodiment, the flyback transformer 115 is utilized to perform flyback transformation on the input voltage and then output the voltage, so that the power supply of the data measurement module 120 and the data output module 140 can be electrically isolated and supplied, thereby being beneficial to protecting the data measurement module 120 and the data output module 140 from damage caused by overlarge voltage, and effectively improving the accuracy of the data acquisition of the data measurement module 120.
Referring to fig. 5, fig. 5 is a block diagram of an inertial navigation system 200 according to an embodiment of the present invention, where the system includes a display device 210 and the inertial navigation device 100, the display device 210 is coupled to the inertial navigation device 100 through a plug, and the display device 210 is configured to display a current position of a carrier acquired by the inertial navigation device 100.
The display device 210 may be a liquid crystal display, an LED display, or an OLCD display, so that an operator can conveniently know the current position of the carrier in real time through the display device 210.
In summary, the embodiment of the invention provides an inertial navigation device and system, which respectively supply power to a data measurement module, a data output module and a signal isolation module through a power isolation module, the power isolation module supplies power to the data measurement module and the data output module through a flyback transformer in an isolated manner, and signal transmission between the data measurement module and the data output module is electrically isolated and transmitted through the signal isolation module, so that the data measurement module and the data output module are protected from damage or abnormal working caused by overlarge input voltage due to external interference.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The inertial navigation device is characterized by comprising a bottom plate, wherein a data measurement module, a data output module, a power isolation module and a signal isolation module are arranged on the bottom plate, and the data measurement module and the data output module are arranged on the bottom plate through electrical isolation so as to form an isolation belt between the data measurement module and the data output module;
the power isolation module is used for respectively supplying power to the data measurement module, the data output module and the signal isolation module, and the power isolation module is used for carrying out isolation power supply on the data measurement module and the data output module through a flyback transformer;
the data measurement module is used for acquiring various parameter values of the carrier and sending the various parameter values of the carrier to the data output module through the signal isolation module;
the signal isolation module is used for carrying out electric isolation transmission on signal transmission between the data measurement module and the data output module;
the data output module is used for outputting the acquired parameter values of the carrier.
2. The inertial navigation device of claim 1, wherein the signal isolation module comprises at least one coupler coupled with the data measurement module, the data output module, the power isolation module, respectively.
3. The inertial navigation device according to claim 2, wherein the at least one coupler is an optical coupler.
4. The inertial navigation device according to claim 2, wherein the at least one coupler is a magnetic coupler.
5. The inertial navigation device of claim 4, wherein the signal isolation module comprises four magnetic couplers, each two of the magnetic couplers being disposed on the base plate on two sides of the isolation strip, two of the magnetic couplers on one side of the isolation strip being coupled to the data output module, and two of the magnetic couplers on the other side of the isolation strip being coupled to the data measurement module.
6. The inertial navigation device of claim 5, wherein the power isolation module is divided into a first power isolation module and a second power isolation module on the bottom plate, the first power isolation module is respectively disposed on two sides of the isolation belt, the first power isolation module supplies power to the data output module and the two magnetic couplers on one side of the isolation belt, and the second power isolation module supplies power to the data measurement module and the two magnetic couplers on the other side of the isolation belt.
7. The inertial navigation device of claim 6, wherein the data measurement module comprises a measurement module, a signal processing module, and a control module; the measuring module is coupled with the signal processing module, the signal processing module is coupled with the control module, the control module is coupled with the signal isolation module, the second power isolation module is respectively coupled with the measuring module, the signal processing module and the control module, and the control module is coupled with two couplers at the other side of the isolation belt;
the measuring module is used for measuring various parameter values of the carrier;
the signal processing module is used for acquiring various parameter values of the carrier;
the control module is used for sending a data acquisition command to the signal processing module so as to acquire the current position of the carrier after processing the acquired parameter values, and outputting the current position of the carrier through the signal isolation module in a corresponding format.
8. The inertial navigation device according to claim 7, wherein the data output module is configured to couple with an external plug and with an external power source for connection to the external plug so that a current position of the carrier is output through the external plug, the data output module comprises a communication interface module and a protection module, the communication interface module and the protection module are both coupled with two couplers on one side of the isolation belt, the protection module is configured to overvoltage protect the inertial navigation device, the communication interface module is configured to output the current position of the carrier through the external plug, and the external power source is coupled with the first power isolation module.
9. The inertial navigation device according to claim 8, wherein a rectifying diode is connected between the external power source and the first power isolation module, a cathode of the rectifying diode being coupled to the external power source, an anode of the rectifying diode being coupled to the first power isolation module.
10. An inertial navigation system, characterized in that the system comprises a display device and an inertial navigation device according to any one of claims 1-9, the display device being coupled to the inertial navigation device by a plug, the display device being adapted to display the current position of the carrier acquired by the inertial navigation device.
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201477570U (en) * | 2009-09-09 | 2010-05-19 | 于广沅 | Multi-channel isolation analogue signal input data acquisition module |
| CN201616023U (en) * | 2010-03-16 | 2010-10-27 | 周卫 | Signal isolation conversion output module |
| WO2012055357A1 (en) * | 2010-10-26 | 2012-05-03 | 江苏多维科技有限公司 | Isolated voltage sensor and isolated voltage sensor using mtj device |
| CN104242615A (en) * | 2014-09-25 | 2014-12-24 | 北京航空航天大学 | High-temperature isolated power device |
| CN104317760A (en) * | 2014-10-23 | 2015-01-28 | 安徽工程大学 | Full-speed USB 3.0 interface isolation protecting device |
| CN205212695U (en) * | 2015-12-02 | 2016-05-04 | 上海航空电器有限公司 | Turn over and swash formula aviation isolator power |
| CN106505882A (en) * | 2016-12-12 | 2017-03-15 | 盐城工学院 | A kind of high_voltage isolation detection control circuit of high-frequency and high-voltage power supply |
| CN207264170U (en) * | 2017-07-20 | 2018-04-20 | 上海浅雪汽车电子有限公司 | Inertial navigation unit and system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7557655B2 (en) * | 2007-11-05 | 2009-07-07 | Schweitzer Engineering Laboratories, Inc. | Systems and methods for isolating an analog signal |
-
2017
- 2017-07-20 CN CN201710594351.3A patent/CN107357248B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201477570U (en) * | 2009-09-09 | 2010-05-19 | 于广沅 | Multi-channel isolation analogue signal input data acquisition module |
| CN201616023U (en) * | 2010-03-16 | 2010-10-27 | 周卫 | Signal isolation conversion output module |
| WO2012055357A1 (en) * | 2010-10-26 | 2012-05-03 | 江苏多维科技有限公司 | Isolated voltage sensor and isolated voltage sensor using mtj device |
| CN104242615A (en) * | 2014-09-25 | 2014-12-24 | 北京航空航天大学 | High-temperature isolated power device |
| CN104317760A (en) * | 2014-10-23 | 2015-01-28 | 安徽工程大学 | Full-speed USB 3.0 interface isolation protecting device |
| CN205212695U (en) * | 2015-12-02 | 2016-05-04 | 上海航空电器有限公司 | Turn over and swash formula aviation isolator power |
| CN106505882A (en) * | 2016-12-12 | 2017-03-15 | 盐城工学院 | A kind of high_voltage isolation detection control circuit of high-frequency and high-voltage power supply |
| CN207264170U (en) * | 2017-07-20 | 2018-04-20 | 上海浅雪汽车电子有限公司 | Inertial navigation unit and system |
Non-Patent Citations (1)
| Title |
|---|
| 陈华婵 ; 孙卫真 ; 何积铨 ; .多通道信号隔离的高精度数据采集系统.微计算机信息.2008,第24卷(第10-1期),162-165. * |
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