CN114285264A - Lightning protection filter circuit based on integrated icing detector - Google Patents
Lightning protection filter circuit based on integrated icing detector Download PDFInfo
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Abstract
The invention belongs to the technical field of electronic circuits, and discloses a lightning protection filter circuit based on an integrated icing detector, which comprises a lightning protection circuit board assembly and a filter circuit board assembly, wherein the lightning protection circuit board assembly is connected with the filter circuit board assembly, the lightning protection circuit board assembly and the filter circuit board assembly are arranged at the downstream of a signal processing circuit board assembly and an upper computer of the icing detector, and are used for performing lightning protection and filter processing on a power supply voltage, an icing alarm signal, a fault alarm signal and a starting self-checking signal, and the processed signals are respectively sent to a DMC (digital controller), a driving circuit board assembly and the signal processing circuit board assembly of the icing detector. The invention is characterized in that the integrated icing detector is subjected to lightning protection and filtering treatment by adopting general components, and no customized component is provided, thereby greatly saving the development cost and the period of the product; the scheme passes the verification of GJB151B and DO160G electromagnetic compatibility test standards of civil and military machines, and is more favorable for obtaining the airworthiness evidence after the product is installed in an airplane.
Description
Technical Field
The invention belongs to the technical field of electronic circuits, relates to a circuit for an aircraft icing detector, and particularly relates to a lightning protection filter circuit based on an integrated icing detector.
Background
Electromagnetic compatibility refers to the ability of an electronic device to function properly in an electromagnetic environment. Electromagnetic interference is a phenomenon of electromagnetic variation that is detrimental to the performance of electronic devices. The electromagnetic interference not only affects the normal operation of the electronic equipment, but also even causes the damage of some components in the electronic equipment. In a modern society developing at a high speed, electronic equipment is visible everywhere, and thousands of large-scale electronic equipment (such as airplanes, ships and the like) can cause great loss if the electronic equipment is not electromagnetically protected and mutually influenced, and the electromagnetic compatibility, the safety and the environmental adaptability are in the same important position. The integrated icing detector adopts a shielding wire to realize electromagnetic protection in the early stage, and the invention mainly aims to shield, filter and ground signals by adopting a filter element inside a product, so that the electromagnetic protection of the integrated icing detector is realized under the condition of using a non-shielding wire.
Disclosure of Invention
In order to solve the problems, the invention provides a lightning protection filter circuit based on an integrated icing detector, which realizes the shielding, filtering and grounding of signals and completes the electromagnetic protection of the integrated icing detector under the condition of using a non-shielding wire.
The technical solution of the invention is as follows:
the utility model provides a lightning protection filter circuit based on integration detector that freezes, including lightning protection circuit board subassembly and filter circuit board subassembly, lightning protection circuit board subassembly and filter circuit board subassembly are connected, lightning protection circuit board subassembly and filter circuit board subassembly are established in the downstream of the signal processing circuit board subassembly and the host computer of freezing the detector, to mains voltage, freeze alarm signal, the fault alarm signal carries out lightning protection and filtering with starting the self-checking signal and handles, the signal after the processing is sent respectively for freezing the DMC of detector, drive circuit board subassembly and signal processing circuit board subassembly.
Furthermore, the lightning protection circuit board assembly comprises a power supply voltage lightning protection circuit module and a signal lightning protection circuit module, and the power supply voltage lightning protection circuit module is not connected with the signal lightning protection circuit module; the filter circuit board assembly comprises a power supply voltage filter circuit module and a signal filter circuit module, and the power supply voltage filter circuit module is not connected with the signal filter circuit module.
Further, the power supply voltage sequentially passes through the power supply voltage lightning protection circuit module and the power supply voltage filter circuit module, and is transmitted to the driving circuit board assembly and the signal processing circuit board assembly of the icing detector for power supply after power supply conversion is completed; the icing warning signal, the fault warning signal and the starting self-checking signal pass through the signal lightning protection circuit module and the signal filtering circuit module in sequence, and are respectively sent to the DMC of the icing detector and the signal processing circuit board assembly for subsequent processing after signal processing is completed.
Further, the power supply voltage lightning protection circuit module comprises a feedthrough capacitor C401, a feedthrough capacitor C402, a transient suppression diode V401, a transient suppression diode V402, a power filter N401, a diode V407, a resistor R403, and a transient suppression diode V406; the positive pole of the 28V power supply is connected with a pin 4 of the power filter N401, the negative pole of the 28V power supply is connected with a pin 2 of the power filter N401, a pin 3 of the power filter N401 is connected with a pin 1 of the diode V407, the pin 2 of the diode V407 is connected with a pin 2 of the transient suppression diode V406 through the resistor R403, and the pin 1 of the transient suppression diode V406 is connected with the pin 1 of the power filter N401; the positive pole of the 28V power supply is connected with the shell ground through a feedthrough capacitor C401, the positive pole of the 28V power supply is also connected with a pin 1 of a transient suppression diode V401, and a pin 2 of the transient suppression diode V401 is connected with the shell ground; the negative electrode of the 28V power supply is connected with the shell ground through the feedthrough capacitor C402, the negative electrode of the 28V power supply is also connected with the No. 1 pin of the transient suppression diode V402, and the No. 2 pin of the transient suppression diode V402 is connected with the shell ground; and a pin 2 of the transient suppression diode V406 is connected with the power supply positive electrode output of the power supply voltage lightning protection circuit module, and a pin 1 of the power supply filter N401 is connected with the power supply negative electrode output of the power supply voltage lightning protection circuit module.
Further, the model of the transient suppression diode V401 and the transient suppression diode V402 is 5KP33CA, the model of the transient suppression diode V406 is SMBJ33CAS, the resistor 403 is 10 Ω, and the model of the power filter N401 is GCXDD 5-6-50; the capacitance values of the feedthrough capacitor C401 and the feedthrough capacitor C402 are 5600 Fp.
Further, the signal lightning protection circuit module comprises a transient suppression diode V403, a transient suppression diode V404, a transient suppression diode V405, a feedthrough capacitor C403, a feedthrough capacitor C404 and a feedthrough capacitor C405; the icing alarm signal is connected to the shell ground from the input to the output through a feedthrough capacitor C403 and a transient suppression diode V403 respectively; the input and the output of the fault alarm signal are respectively connected with the shell ground through a feedthrough capacitor C404 and a transient suppression diode V404; the input and the output of the starting self-test signal are respectively connected with the shell ground through a feedthrough capacitor C405 and a transient suppression diode V405.
Further, the models of the transient suppression diode V403, the transient suppression diode V404 and the transient suppression diode V405 are 5KP33 CA; the capacitance values of the feedthrough capacitor C403, the feedthrough capacitor C404, and the feedthrough capacitor C405 are 5600 Fp.
Further, the power supply voltage filter circuit module comprises a capacitor C301, a capacitor C302, a capacitor C303, a capacitor C304, a capacitor C305, a capacitor C306, a capacitor C307, a capacitor C308, a capacitor C309, a capacitor C310, a capacitor C311, a capacitor C312, a filter L301, a diode V301, an inductor L302, an inductor L303, an inductor L304, an inductor L305, and a power supply conversion module N302;
the positive output of the power supply voltage lightning protection circuit module is connected with the No. 1 pin of the filter L301, and the negative output of the power supply voltage lightning protection circuit module is connected with the No. 4 pin of the filter L301;
pin 2 of the filter L301 is connected to pin 6 of the power conversion module N302 through an inductor L302 and an inductor L303, and pin 3 of the filter L301 is connected to pin 7 of the power conversion module N302 through an inductor L304 and an inductor L305;
pin 1 of the power supply conversion module N302 is used as the power supply positive electrode output of the power supply voltage filter circuit module, and pin 2 of the power supply conversion module N302 is used as the power supply negative electrode output of the power supply voltage filter circuit module;
no. 1 pin and No. 4 pin of the filter L301 are connected with the diode V301 through the capacitor C301 and the capacitor C304 respectively, the No. 1 pin of the filter L301 is connected with the shell ground through the capacitor C302, and the No. 4 pin of the filter L301 is connected with the shell ground through the capacitor C303;
no. 2 pin and No. 3 pin of the filter L301 are connected through a capacitor C305 and a capacitor C308 respectively, the No. 2 pin of the filter L301 is connected with the shell ground through a capacitor C306, and the No. 3 pin of the filter L301 is connected with the shell ground through a capacitor C307;
the No. 6 pin and the No. 7 pin of the power supply conversion module N302 are respectively connected through a capacitor C309 and a capacitor C310;
no. 1 pin and No. 2 pin of the power conversion module N302 are connected through a capacitor C311 and a capacitor C312 respectively.
Further, the capacitance value of the capacitor C301 is 4700pF, the capacitance value of the capacitor C302 is 0.1 μ F, the capacitance value of the capacitor C303 is 0.1 μ F, the capacitance value of the capacitor C304 is 0.22 μ F, the capacitance value of the capacitor C305 is 0.22 μ F, the capacitance value of the capacitor C306 is 0.27 μ F, the capacitance value of the capacitor C307 is 0.27 μ F, the capacitance value of the capacitor C308 is 1 μ F, the capacitance value of the capacitor C309 is 1600 μ F/50V, the capacitance value of the capacitor C310 is 0.1 μ F, the capacitance value of the capacitor C311 is 47 μ F, the capacitance value of the capacitor C312 is 0.22 μ F, the model of the filter L301 is THH2, the model of the diode V301 is 2CZ103SM, the inductance value of the inductance L302 is 600, the inductance value of the inductance L303 is 600, the inductance L304 is 100, the inductance L305 is 100, and the inductance L302 is ZSA 25W 25/27 of the power conversion module 05A W28.
Further, the signal filtering circuit module includes a filter L307, a capacitor C313, a capacitor C314, a capacitor C315, a capacitor C316, an inductor L308, an inductor L309, and an inductor L310; an icing alarm signal output by the signal lightning protection circuit module is connected with a pin 3 of the filter L307, and the pin 3 of the filter L307 is output to the DMC of the icing detector through the inductor L308; a fault alarm signal output by the signal lightning protection circuit module is connected with a No. 2 pin of the filter L307, and the No. 2 pin of the filter L307 is output to the DMC of the icing detector through the inductor L309; the starting self-detection signal output by the signal lightning protection circuit module is connected with a pin 1 of the filter L307, and the pin 1 of the filter L307 is output to a signal processing circuit board assembly of the icing detector through the inductor L310;
pin 3 of filter L307 is connected to the case ground through capacitor C313, pin 2 of filter L307 is connected to the case ground through capacitor C314, pin 1 of filter L307 is connected to the case ground through capacitor C315, and pin 1 of filter L307 is connected to pin 3 of filter L307 through capacitor C316.
Furthermore, inductance values of the inductor L308, the inductor L309 and the inductor L310 are all 600; the capacitance values of the capacitor C313, the capacitor C314 and the capacitor C315 are all 0.27 muF, and the capacitance value of the capacitor C316 is 0.22 muF.
The signal filter circuit module also comprises a frequency test circuit for T0, and the frequency test circuit outputs a 600 inductance value inductance and a 110 inductance value inductance connection in series.
The invention has the following advantages:
1. the invention is characterized in that the integrated icing detector is subjected to lightning protection and filtering treatment by adopting general components, and no customized component is provided, thereby greatly saving the development cost and the period of the product;
2. the scheme passes the verification of GJB151B and DO160G electromagnetic compatibility test standards of civil and military machines, and is more favorable for obtaining the airworthiness evidence after the product is installed in an airplane.
Drawings
FIG. 1 is a cross-linked diagram of the system of the present invention;
FIG. 2 is a diagram of a lightning protection circuit board assembly;
fig. 3 is a diagram of a filter circuit board assembly.
Detailed Description
This section is an example of the present invention and is provided to explain and illustrate the technical solutions of the present invention.
The utility model provides a lightning protection filter circuit based on integration detector that freezes, including lightning protection circuit board subassembly and filter circuit board subassembly, lightning protection circuit board subassembly and filter circuit board subassembly are connected, lightning protection circuit board subassembly and filter circuit board subassembly are established in the downstream of the signal processing circuit board subassembly and the host computer of freezing the detector, to mains voltage, freeze alarm signal, the fault alarm signal carries out lightning protection and filtering with starting the self-checking signal and handles, the signal after the processing is sent respectively for freezing the DMC of detector, drive circuit board subassembly and signal processing circuit board subassembly.
The lightning protection circuit board assembly comprises a power supply voltage lightning protection circuit module and a signal lightning protection circuit module, and the power supply voltage lightning protection circuit module is not connected with the signal lightning protection circuit module; the filter circuit board assembly comprises a power supply voltage filter circuit module and a signal filter circuit module, and the power supply voltage filter circuit module is not connected with the signal filter circuit module.
The power supply voltage is transmitted to the driving circuit board assembly and the signal processing circuit board assembly of the icing detector for power supply after completing power supply conversion through the power supply voltage lightning protection circuit module and the power supply voltage filter circuit module in sequence; the icing warning signal, the fault warning signal and the starting self-checking signal pass through the signal lightning protection circuit module and the signal filtering circuit module in sequence, and are respectively sent to the DMC of the icing detector and the signal processing circuit board assembly for subsequent processing after signal processing is completed.
The power supply voltage lightning protection circuit module comprises a feedthrough capacitor C401, a feedthrough capacitor C402, a transient suppression diode V401, a transient suppression diode V402, a power filter N401, a diode V407, a resistor R403 and a transient suppression diode V406; the positive pole of the 28V power supply is connected with a pin 4 of the power filter N401, the negative pole of the 28V power supply is connected with a pin 2 of the power filter N401, a pin 3 of the power filter N401 is connected with a pin 1 of the diode V407, the pin 2 of the diode V407 is connected with a pin 2 of the transient suppression diode V406 through the resistor R403, and the pin 1 of the transient suppression diode V406 is connected with the pin 1 of the power filter N401; the positive pole of the 28V power supply is connected with the shell ground through a feedthrough capacitor C401, the positive pole of the 28V power supply is also connected with a pin 1 of a transient suppression diode V401, and a pin 2 of the transient suppression diode V401 is connected with the shell ground; the negative electrode of the 28V power supply is connected with the shell ground through the feedthrough capacitor C402, the negative electrode of the 28V power supply is also connected with the No. 1 pin of the transient suppression diode V402, and the No. 2 pin of the transient suppression diode V402 is connected with the shell ground; and a pin 2 of the transient suppression diode V406 is connected with the power supply positive electrode output of the power supply voltage lightning protection circuit module, and a pin 1 of the power supply filter N401 is connected with the power supply negative electrode output of the power supply voltage lightning protection circuit module.
The models of the transient suppression diode V401 and the transient suppression diode V402 are 5KP33CA, the model of the transient suppression diode V406 is SMBJ33CAS, the resistor 403 is 10 Ω, and the model of the power filter N401 is GCXDD 5-6-50; the capacitance values of the feedthrough capacitor C401 and the feedthrough capacitor C402 are 5600 Fp.
The signal lightning protection circuit module comprises a transient suppression diode V403, a transient suppression diode V404, a transient suppression diode V405, a feedthrough capacitor C403, a feedthrough capacitor C404 and a feedthrough capacitor C405; the icing alarm signal is connected to the shell ground from the input to the output through a feedthrough capacitor C403 and a transient suppression diode V403 respectively; the input and the output of the fault alarm signal are respectively connected with the shell ground through a feedthrough capacitor C404 and a transient suppression diode V404; the input and the output of the starting self-test signal are respectively connected with the shell ground through a feedthrough capacitor C405 and a transient suppression diode V405.
The models of the transient suppression diode V403, the transient suppression diode V404 and the transient suppression diode V405 are 5KP33 CA; the capacitance values of the feedthrough capacitor C403, the feedthrough capacitor C404, and the feedthrough capacitor C405 are 5600 Fp.
The power supply voltage filtering circuit module comprises a capacitor C301, a capacitor C302, a capacitor C303, a capacitor C304, a capacitor C305, a capacitor C306, a capacitor C307, a capacitor C308, a capacitor C309, a capacitor C310, a capacitor C311, a capacitor C312, a filter L301, a diode V301, an inductor L302, an inductor L303, an inductor L304, an inductor L305 and a power supply conversion module N302;
the positive output of the power supply voltage lightning protection circuit module is connected with the No. 1 pin of the filter L301, and the negative output of the power supply voltage lightning protection circuit module is connected with the No. 4 pin of the filter L301;
pin 2 of the filter L301 is connected to pin 6 of the power conversion module N302 through an inductor L302 and an inductor L303, and pin 3 of the filter L301 is connected to pin 7 of the power conversion module N302 through an inductor L304 and an inductor L305;
pin 1 of the power supply conversion module N302 is used as the power supply positive electrode output of the power supply voltage filter circuit module, and pin 2 of the power supply conversion module N302 is used as the power supply negative electrode output of the power supply voltage filter circuit module;
no. 1 pin and No. 4 pin of the filter L301 are connected with the diode V301 through the capacitor C301 and the capacitor C304 respectively, the No. 1 pin of the filter L301 is connected with the shell ground through the capacitor C302, and the No. 4 pin of the filter L301 is connected with the shell ground through the capacitor C303;
no. 2 pin and No. 3 pin of the filter L301 are connected through a capacitor C305 and a capacitor C308 respectively, the No. 2 pin of the filter L301 is connected with the shell ground through a capacitor C306, and the No. 3 pin of the filter L301 is connected with the shell ground through a capacitor C307;
the No. 6 pin and the No. 7 pin of the power supply conversion module N302 are respectively connected through a capacitor C309 and a capacitor C310;
no. 1 pin and No. 2 pin of the power conversion module N302 are connected through a capacitor C311 and a capacitor C312 respectively.
The capacitance value of the capacitor C301 is 4700pF, the capacitance value of the capacitor C302 is 0.1 muF, the capacitance value of the capacitor C303 is 0.1 muF, the capacitance value of the capacitor C304 is 0.22 muF, the capacitance value of the capacitor C305 is 0.22 muF, the capacitance value of the capacitor C306 is 0.27 muF, the capacitance value of the capacitor C307 is 0.27 muF, the capacitance value of the capacitor C308 is 1 muF, the capacitance C309 is 1600 muF/50V, the capacitance value of the capacitor C310 is 0.1 muF, the capacitance value of the capacitor C311 is 47 muF, the capacitance value of the capacitor C312 is 0.22 muF, the model of the filter L301 is THH2, the model of the diode V301 is 2CZ103SM, the inductance value of the inductor L302 is 600, the inductance value of the inductor L303 is 600, the inductance value of the inductor L304 is 100, the inductance value of the L305 is 100, and the inductance value of the power supply conversion module N302 is ZSS 05A W A S05/26W 26.
The signal filtering circuit module comprises a filter L307, a capacitor C313, a capacitor C314, a capacitor C315, a capacitor C316, an inductor L308, an inductor L309 and an inductor L310; an icing alarm signal output by the signal lightning protection circuit module is connected with a pin 3 of the filter L307, and the pin 3 of the filter L307 is output to the DMC of the icing detector through the inductor L308; a fault alarm signal output by the signal lightning protection circuit module is connected with a No. 2 pin of the filter L307, and the No. 2 pin of the filter L307 is output to the DMC of the icing detector through the inductor L309; the starting self-detection signal output by the signal lightning protection circuit module is connected with a pin 1 of the filter L307, and the pin 1 of the filter L307 is output to a signal processing circuit board assembly of the icing detector through the inductor L310;
pin 3 of filter L307 is connected to the case ground through capacitor C313, pin 2 of filter L307 is connected to the case ground through capacitor C314, pin 1 of filter L307 is connected to the case ground through capacitor C315, and pin 1 of filter L307 is connected to pin 3 of filter L307 through capacitor C316.
Inductance values of the inductor L308, the inductor L309 and the inductor L310 are all 600; the capacitance values of the capacitor C313, the capacitor C314 and the capacitor C315 are all 0.27 muF, and the capacitance value of the capacitor C316 is 0.22 muF.
The signal filter circuit module also comprises a frequency test circuit for T0, and the frequency test circuit outputs a 600 inductance value inductance and a 110 inductance value inductance connection in series.
The following further describes the embodiments of the present invention with reference to the drawings.
A design of a lightning protection filter circuit based on an integrated icing detector comprises a lightning protection circuit board component and a filter power supply circuit board component; performing lightning protection and primary filtering processing on signals connected with an upper computer in the lightning protection circuit board assembly; the filter power supply circuit board assembly carries out secondary filter processing on the signals and converts the 28V power supply into a 5V power supply, so that pure and interference-free 5V power supply is provided for the signal processing circuit board and the driving circuit board.
The lightning protection circuit board component is used for carrying out lightning protection and primary filtering processing on signals connected with the upper computer.
The lightning protection circuit board assembly comprises a high-power transient suppression diode (5KP33CA) for lightning protection; the feed-through capacitor (JCT52-4T-X7R-100V563Z-S08-Ag) and the power filter (GCXDD5-6-50) perform primary filtering processing on the signals.
The filter power supply circuit board assembly carries out secondary filter processing on the signals and converts the 28V power supply into a 5V power supply, so that pure and interference-free 5V power supply is provided for the signal processing circuit board and the driving circuit board.
The filtering power supply circuit board assembly comprises a differential mode inductor, a common mode inductor, a capacitor and a magnetic bead to carry out secondary filtering on signals; a DC-DC power supply module (ZSA28SO5A) converting a 28V power supply to a 5V power supply and separating a power ground from a signal ground; the high-energy mixed tantalum capacitor (THCL-50V-1600uF) can ensure normal work within 50ms of product power failure
As shown in fig. 1, the integrated icing detector is composed of a vibrator assembly, a heater assembly, a driving circuit board assembly, a signal processing circuit board assembly, a power filter circuit board assembly, a lightning protection circuit board assembly and the like. After the upper computer provides a28 VDC power supply, the power supply signal is subjected to lightning protection and filtering through the lightning protection circuit board and the power supply filter circuit board, and then is converted into a 5V signal to be provided to the signal processing circuit board and the driving circuit board; the thickness of the ice layer is detected by the vibrator assembly, the ice layer is converted into an electric signal, a feedback signal is provided for the driving circuit board assembly, the electric signal is converted into 0/5 square waves by the driving circuit board assembly and is transmitted to the signal processing circuit board assembly, the signal processing circuit board assembly judges whether the ice layer is in an icing environment or not through 0/5 square waves with different frequencies, when ice is deposited on a probe of the vibrator assembly, the mass of the probe is changed, and therefore the vibration frequency is changed. When the frequency reaches a certain value, the signal circuit board assembly sends an icing alarm instruction and a detector deicing instruction. And the power supply filter circuit board and the lightning protection circuit board are used for filtering and then transmitting the filtered power supply filter circuit board and the filtered lightning protection circuit board to an upper computer.
As shown in fig. 2, the integrated icing detector has 5 pins connected with an upper computer, namely a 28V + and a 28V power ground, an icing alarm signal, a fault alarm signal and a start self-check signal. 5 pins in the lightning protection circuit board realize lightning protection through transient suppression diodes with 5000W power connected in parallel with the shell; a 5600Fp feedthrough capacitor is connected in series to the pin to realize primary filtering of the signal, and the feedthrough capacitor can pass a large current (10A), the maximum current of the power filter is only 3A, and the heating current of the vibrating head is 8.8A, so that the feedthrough capacitor is connected in series to the 28V power line and then the wire is divided to provide a heating power supply for the heater, and no large interference signal exists in the heating power supply; in order to achieve the best filtering effect, the feedthrough capacitor and the power filter are grounded better and are arranged at the forefront end of a product for filtering, the power filter is connected behind the feedthrough capacitor, the large-area class shell of the metal shell of the power filter is grounded, and the feedthrough capacitor and the power filter are arranged in the shielding shell to achieve the shielding effect; and a subsequent series silicon rectifier diode protection circuit is connected in parallel with a low-power transient suppression diode protection circuit between 28V + and the power ground, so that the circuit is clamped at 33V.
As shown in fig. 3, after the lightning protection and the primary filtering of the lightning protection circuit board, the power filter circuit board is used to perform secondary filtering on the signal, and convert the 28V power into the 5V power. Through calculation and analysis, interference signals with different frequencies are filtered by different capacitors and magnetic beads, common mode inductance is adopted to inhibit common mode interference, after a 28V power supply is filtered completely, a power supply signal is provided for a driving circuit board through a branch line, a high-energy mixed tantalum capacitor is connected between 28V + and a power ground in parallel, the fact that the product can continue to work normally within 50ms of power failure is guaranteed, then the power ground is separated from the signal ground through a 28V-to-5V power supply module, interference of an external power ground is effectively isolated, and work of sensitive components cannot be affected.
Claims (10)
1. The utility model provides a lightning protection filter circuit based on integration detector that freezes, a serial communication port, including lightning protection circuit board subassembly and filter circuit board subassembly, lightning protection circuit board subassembly and filter circuit board subassembly are connected, lightning protection circuit board subassembly and filter circuit board subassembly are established in the downstream of the signal processing circuit board subassembly and the host computer of freezing the detector, to mains voltage, freeze the alarm signal, the trouble alarm signal carries out lightning protection and filtering with starting the self-checking signal and handles, the signal after handling sends the DMC for freezing the detector respectively, drive circuit board subassembly and signal processing circuit board subassembly.
2. The lightning protection filter circuit based on the integrated icing detector as recited in claim 1, wherein the lightning protection circuit board assembly comprises a power supply voltage lightning protection circuit module and a signal lightning protection circuit module, and the power supply voltage lightning protection circuit module is not connected with the signal lightning protection circuit module; the filter circuit board assembly comprises a power supply voltage filter circuit module and a signal filter circuit module, and the power supply voltage filter circuit module is not connected with the signal filter circuit module.
3. The lightning protection filter circuit based on the integrated icing detector as recited in claim 2, wherein a power supply voltage passes through the power supply voltage lightning protection circuit module and the power supply voltage filter circuit module in sequence, and is transmitted to the driving circuit board assembly and the signal processing circuit board assembly of the icing detector for power supply after power supply conversion is completed; the icing warning signal, the fault warning signal and the starting self-checking signal pass through the signal lightning protection circuit module and the signal filtering circuit module in sequence, and are respectively sent to the DMC of the icing detector and the signal processing circuit board assembly for subsequent processing after signal processing is completed.
4. The lightning protection filter circuit based on the integrated icing detector as recited in claim 3, wherein the supply voltage lightning protection circuit module comprises a feedthrough capacitor C401, a feedthrough capacitor C402, a transient suppression diode V401, a transient suppression diode V402, a supply filter N401, a diode V407, a resistor R403 and a transient suppression diode V406;
the positive pole of the 28V power supply is connected with a pin 4 of the power filter N401, the negative pole of the 28V power supply is connected with a pin 2 of the power filter N401, a pin 3 of the power filter N401 is connected with a pin 1 of the diode V407, the pin 2 of the diode V407 is connected with a pin 2 of the transient suppression diode V406 through the resistor R403, and the pin 1 of the transient suppression diode V406 is connected with the pin 1 of the power filter N401;
the positive pole of the 28V power supply is connected with the shell ground through a feedthrough capacitor C401, the positive pole of the 28V power supply is also connected with a pin 1 of a transient suppression diode V401, and a pin 2 of the transient suppression diode V401 is connected with the shell ground;
the negative electrode of the 28V power supply is connected with the shell ground through the feedthrough capacitor C402, the negative electrode of the 28V power supply is also connected with the No. 1 pin of the transient suppression diode V402, and the No. 2 pin of the transient suppression diode V402 is connected with the shell ground;
and a pin 2 of the transient suppression diode V406 is connected with the power supply positive electrode output of the power supply voltage lightning protection circuit module, and a pin 1 of the power supply filter N401 is connected with the power supply negative electrode output of the power supply voltage lightning protection circuit module.
5. The lightning protection filter circuit based on the integrated icing detector as claimed in claim 4, wherein the model of the transient suppression diode V401 and the transient suppression diode V402 is 5KP33CA, the model of the transient suppression diode V406 is SMBJ33CAS, the resistor 403 is 10 Ω, and the model of the power filter N401 is GCXDD 5-6-50; the capacitance values of the feedthrough capacitor C401 and the feedthrough capacitor C402 are 5600 Fp.
6. The lightning protection filter circuit based on the integrated icing detector as recited in claim 3, wherein the signal lightning protection circuit module comprises a transient suppression diode V403, a transient suppression diode V404, a transient suppression diode V405, a feedthrough capacitor C403, a feedthrough capacitor C404 and a feedthrough capacitor C405; the icing alarm signal is connected to the shell ground from the input to the output through a feedthrough capacitor C403 and a transient suppression diode V403 respectively; the input and the output of the fault alarm signal are respectively connected with the shell ground through a feedthrough capacitor C404 and a transient suppression diode V404; the input and the output of the starting self-test signal are respectively connected with the shell ground through a feedthrough capacitor C405 and a transient suppression diode V405.
7. The lightning protection filter circuit based on the integrated icing detector as recited in claim 6, wherein the models of the transient suppression diode V403, the transient suppression diode V404 and the transient suppression diode V405 are 5KP33 CA; the capacitance values of the feedthrough capacitor C403, the feedthrough capacitor C404, and the feedthrough capacitor C405 are 5600 Fp.
8. The lightning protection filter circuit based on the integrated icing detector as recited in claim 3, wherein the power supply voltage filter circuit module comprises a capacitor C301, a capacitor C302, a capacitor C303, a capacitor C304, a capacitor C305, a capacitor C306, a capacitor C307, a capacitor C308, a capacitor C309, a capacitor C310, a capacitor C311, a capacitor C312, a filter L301, a diode V301, an inductor L302, an inductor L303, an inductor L304, an inductor L305 and a power supply conversion module N302;
the positive output of the power supply voltage lightning protection circuit module is connected with the No. 1 pin of the filter L301, and the negative output of the power supply voltage lightning protection circuit module is connected with the No. 4 pin of the filter L301;
pin 2 of the filter L301 is connected to pin 6 of the power conversion module N302 through an inductor L302 and an inductor L303, and pin 3 of the filter L301 is connected to pin 7 of the power conversion module N302 through an inductor L304 and an inductor L305;
pin 1 of the power supply conversion module N302 is used as the power supply positive electrode output of the power supply voltage filter circuit module, and pin 2 of the power supply conversion module N302 is used as the power supply negative electrode output of the power supply voltage filter circuit module;
no. 1 pin and No. 4 pin of the filter L301 are connected with the diode V301 through the capacitor C301 and the capacitor C304 respectively, the No. 1 pin of the filter L301 is connected with the shell ground through the capacitor C302, and the No. 4 pin of the filter L301 is connected with the shell ground through the capacitor C303;
no. 2 pin and No. 3 pin of the filter L301 are connected through a capacitor C305 and a capacitor C308 respectively, the No. 2 pin of the filter L301 is connected with the shell ground through a capacitor C306, and the No. 3 pin of the filter L301 is connected with the shell ground through a capacitor C307;
the No. 6 pin and the No. 7 pin of the power supply conversion module N302 are respectively connected through a capacitor C309 and a capacitor C310;
no. 1 pin and No. 2 pin of the power conversion module N302 are connected through a capacitor C311 and a capacitor C312 respectively.
9. The lightning protection filter circuit based on the integrated icing detector as recited in claim 8, wherein a capacitance of the capacitor C301 is 4700pF, a capacitance of the capacitor C302 is 0.1 μ F, a capacitance of the capacitor C303 is 0.1 μ F, a capacitance of the capacitor C304 is 0.22 μ F, a capacitance of the capacitor C305 is 0.22 μ F, a capacitance of the capacitor C306 is 0.27 μ F, a capacitance of the capacitor C307 is 0.27 μ F, a capacitance of the capacitor C308 is 1 μ F, a capacitance of the capacitor C309 is 1600 μ F/50V, a capacitance of the capacitor C310 is 0.1 μ F, a capacitance of the capacitor C311 is 47 μ F, a capacitance of the capacitor C312 is 0.22 μ F, a capacitance of the filter L301 is model THH2, a capacitance of the diode V301 is 2 103SM, a capacitance of the inductor L302 is 600, a capacitance of the inductor L303 is 600, an inductance L304 is 100L, an inductance L305 is 100L CZ conversion module is 100W/52.
10. The lightning protection filter circuit based on the integrated icing detector as recited in claim 3, wherein the signal filter circuit module comprises a filter L307, a capacitor C313, a capacitor C314, a capacitor C315, a capacitor C316, an inductor L308, an inductor L309 and an inductor L310; an icing alarm signal output by the signal lightning protection circuit module is connected with a pin 3 of the filter L307, and the pin 3 of the filter L307 is output to the DMC of the icing detector through the inductor L308; a fault alarm signal output by the signal lightning protection circuit module is connected with a No. 2 pin of the filter L307, and the No. 2 pin of the filter L307 is output to the DMC of the icing detector through the inductor L309; the starting self-detection signal output by the signal lightning protection circuit module is connected with a pin 1 of the filter L307, and the pin 1 of the filter L307 is output to a signal processing circuit board assembly of the icing detector through the inductor L310;
pin 3 of filter L307 is connected to the case ground through capacitor C313, pin 2 of filter L307 is connected to the case ground through capacitor C314, pin 1 of filter L307 is connected to the case ground through capacitor C315, and pin 1 of filter L307 is connected to pin 3 of filter L307 through capacitor C316.
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| CN202111469118.5A CN114285264B (en) | 2021-12-03 | 2021-12-03 | Lightning protection filter circuit based on integrated icing detector |
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| CN202111469118.5A CN114285264B (en) | 2021-12-03 | 2021-12-03 | Lightning protection filter circuit based on integrated icing detector |
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| WO2007068185A1 (en) * | 2005-12-12 | 2007-06-21 | Shenzhen Clou Power Technology Co., Ltd | A signal lightning protection circuit |
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| WO2007068185A1 (en) * | 2005-12-12 | 2007-06-21 | Shenzhen Clou Power Technology Co., Ltd | A signal lightning protection circuit |
| CN201766355U (en) * | 2010-08-12 | 2011-03-16 | 合肥航太电物理技术有限公司 | Lightening protection device of electric-heating deicing system of airplane propeller |
| CN204386811U (en) * | 2014-12-29 | 2015-06-10 | 锋电能源技术有限公司 | A kind of fan blade of wind generating set deicer |
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