CN113380167A - Aerospace-grade nixie tube display driving circuit and application thereof - Google Patents
Aerospace-grade nixie tube display driving circuit and application thereof Download PDFInfo
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- CN113380167A CN113380167A CN202110662028.1A CN202110662028A CN113380167A CN 113380167 A CN113380167 A CN 113380167A CN 202110662028 A CN202110662028 A CN 202110662028A CN 113380167 A CN113380167 A CN 113380167A
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- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/04—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions
- G09G3/06—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions using controlled light sources
- G09G3/12—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions using controlled light sources using electroluminescent elements
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Abstract
The invention discloses an aerospace-level nixie tube display driving circuit and application thereof.A power supply input pin of a reset circuit is connected with a same-partition power supply of an equipment processor, a watchdog input pin is connected with a general output pin of the equipment processor, the watchdog output pin is connected with the reset input pin, the reset output pin is connected with a reset pin of the equipment processor and a reset pin of a dynamic refreshing common-cathode nixie tube circuit, a voltage monitoring output pin is connected with a switching pin of a power supply conversion circuit, the power supply input pin and a low-power input pin of the power supply conversion circuit are connected with an equipment main power supply, the power supply output pin of the power supply conversion circuit is connected with the power supply input pin and the voltage monitoring input pin of the dynamic refreshing common-cathode nixie tube circuit, a voltage division circuit is connected between the voltage monitoring input pin and the power supply output pin, and the voltage monitoring input pin is connected with the general output input pin of the equipment processor. The invention has good performance in resisting space irradiation environment and can effectively resist the influence of space high-energy ions.
Description
Technical Field
The invention belongs to the technical field of aerospace electronics, and particularly relates to an aerospace-grade nixie tube display driving circuit and application thereof.
Background
China has achieved outstanding performance in the field of manned space flight, each cabin section of a domestic space station with independent property rights in 2021 is sequentially launched, constructed and operated in a trial mode, a space station microwave oven is key food heating equipment which is firstly equipped in the space kitchen of the space station in China, and in-orbit flight, spacemen use the microwave oven to heat food for eating for many times every day, so that the health and vigor of the spacemen are guaranteed to complete space station flight test tasks.
The microwave oven is high-voltage (about 2000V alternating current), high-frequency (2.54GHz) and high-power equipment (about 700W), has the characteristics of high-frequency high-power microwave strong interference and high-voltage high-current danger, and has the environmental condition of space irradiation, so that the reliable and safe operation is very important for the personal safety of astronauts and the reliable operation of other equipment in space stations, and the space station microwave oven adopts the LED nixie tube display circuit technology, so that the nixie tube application circuit which adopts nationwide aerospace components to design an anti-space irradiation environment and is suitable for brightness is very important for the health and safety of the astronauts, even the operation safety of the space stations.
The commercial nixie tube display circuit is a commercial element without anti-irradiation technical indexes, the circuit is very simple, the anti-single particle irradiation latch technology is not adopted, the commercial nixie tube display circuit is directly applied to the outer space, the influence of high-energy ions can cause single particle latch, total dose failure and other faults or damage devices, so that the display cannot be normally and reliably displayed, even accidents can occur due to the fact that effective measures cannot be timely taken for processing, and therefore the commercial nixie tube display technology cannot be directly applied to a space station microwave oven. Therefore, it is urgently needed to design an LED nixie tube display circuit with an anti-radiation technology to greatly improve the reliability and safety of the microwave oven in the space station, provide safe heating equipment for astronauts, ensure the personal safety of the astronauts, and ensure the reliable operation of other equipment in the space station, thereby ensuring the satisfactory completion of the flight mission of the space station.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides an aerospace-grade nixie tube display driving circuit and application thereof, which have good performance in resisting space irradiation environment, can effectively resist the influence of space high-energy ions, can be safely applied to the space station environment for a long time, have proper brightness and can meet the application requirements of the space station microwave oven in China.
In order to solve the technical problems, the invention is realized by the following technical scheme:
an aerospace-grade nixie tube display driving circuit comprises a reset circuit, a power supply conversion circuit and a dynamic refreshing common cathode nixie tube circuit, wherein a power supply input pin VCC of the reset circuit is connected with a power supply Vdd1 which is the same partition of a device processor, a watchdog input pin WDI of the reset circuit is connected with a general output pin VMU _ OUT1 of the device processor, a watchdog output pin WDO of the reset circuit is connected with a reset input pin/MR of the reset circuit, a reset output pin/RST of the reset circuit is connected with a reset pin VMU _ RST of the device processor and a pin CLR of the dynamic refreshing common cathode nixie tube circuit, a voltage monitoring output pin PFO of the reset circuit is connected with a switch pin OFF of the power supply conversion circuit, a power supply input pin IN of the power supply conversion circuit and a low-capacity input pin LBI of the power supply are connected with a device main power supply Vcc, the feedback pin SET and the ground pin GND of the power conversion circuit are grounded, the power output pin OUT of the power conversion circuit is connected with the power input pin VCC of the dynamic refresh common cathode nixie tube circuit and the voltage monitoring input pin PFI of the reset circuit, a voltage division circuit is connected between the voltage monitoring input pin PFI of the reset circuit and the power output pin OUT of the power conversion circuit, and the voltage monitoring input pin PFI of the reset circuit is connected with the general output input pin VMU _ IO1 of the equipment processor.
Further, the dynamic refreshing common cathode nixie tube circuit comprises a logic or gate circuit, a latch, a first relay, a second relay, a third relay, a first LED nixie tube, a second LED nixie tube and a third LED nixie tube, wherein a clear pin CLR and a power supply input pin VCC of the latch are the clear pin CLR and the power supply input pin VCC of the dynamic refreshing common cathode nixie tube circuit; the first input pin and the second input pin of the logic or gate circuit are correspondingly connected with a chip selection signal pin VMU _ CS and a write signal pin VMU _ WE of the equipment processor, the output pin of the logic or gate circuit is connected with a write signal pin CLK of the latch, the 8-bit data input pin D of the latch is correspondingly connected with an 8-bit data bus VMU _ D of the equipment processor, the first 7-bit data output pin Q of the latch is respectively connected with 7 input pins of the first LED nixie tube, the second LED nixie tube and the third LED nixie tube in series after being connected with a current limiting resistor in series, the 8-bit data output pin Q of the latch is connected with a decimal point pin DP of the first LED nixie tube in series after being connected with a current limiting resistor in series, and the ground pins GND of the first LED nixie tube, the second LED nixie tube and the third LED nixie tube are correspondingly connected with the load positive pins GND of the first relay, the second relay and the third relay, the control positive pins of the first relay, the second relay and the third relay are correspondingly connected with universal output pins VMU _ OUT2, VMU _ OUT3 and VMU _ OUT4 of the equipment processor, the first LED nixie tube is used for displaying minutes and letters, and the second LED nixie tube and the third LED nixie tube are used for displaying seconds and letters.
Furthermore, the first 7-bit data output pin Q of the latch is respectively connected in series with the two current-limiting resistors, and the 8-th data output pin Q of the latch is connected in series with the two current-limiting resistors.
Furthermore, the decimal point pins DP of the second LED nixie tube and the third LED nixie tube are grounded.
Further, the load negative terminal pin and the control negative terminal pin of the first relay, the second relay and the third relay are grounded.
Further, the logic or gate circuit is a domestic CAST level B54AC32 circuit, the latch is a domestic CAST level B54AC273 latch, the first, second and third relays are domestic CAST level 1JG2-3 solid-state relays, and the first, second and third LED nixie tubes are domestic G + level BS241 nixie tubes.
Furthermore, the voltage dividing circuit comprises a pull-up resistor and a pull-down resistor which are arranged according to a preset proportion, one end of the pull-up resistor is connected with a power output pin OUT of the power conversion circuit, one end of the pull-down resistor is grounded, and the other end of the pull-up resistor is connected with the other end of the pull-down resistor and then connected with a voltage monitoring input pin PFI of the reset circuit.
Further, the reset circuit selects a domestic CAST stage JR706RD circuit.
Furthermore, the power supply conversion circuit adopts a domestic CAST stage LS883 circuit.
An application of an aerospace-grade nixie tube display driving circuit is applied to an aerospace-grade microwave oven.
Compared with the prior art, the invention has at least the following beneficial effects: the invention relates to an aerospace-grade nixie tube display driving circuit, which is characterized in that aerospace-grade components with certain space high-energy particle irradiation resistance are selected, and a subarea power supply current limiting circuit, a subarea power supply voltage detection circuit and a subarea power supply switch electric circuit are designed according to the characteristic that when a space high-energy particle irradiation latch-up effect occurs, a low-resistance path is formed between a power supply and the ground, so that the high-current can damage the components.
The invention is based on space anti-radiation design technology, develops a successful space navigation grade nixie tube display driving circuit, is applied to space station kitchen heating microwave oven emitted by China, in a long-term flight task standing in space for more than ten years, astronauts in work and life regularly use a microwave oven to heat delicious space food for eating, an LED nixie tube of the microwave oven displays the space irradiation resistant environment of an application circuit, the brightness is proper, the heating parameters set by the astronauts, the operating state parameters of the microwave oven and alarm information are displayed with high reliability, so that the astronaut can master the working state of the space station microwave oven in time and adopt corresponding countermeasures, corresponding measures are adopted in time to avoid accidents under the condition that the nixie tube displays faults, so that the astronauts can eat delicious food every day to maintain the health of the bodies, and the space station work tasks are completed satisfactorily; the personal safety of astronauts and the operation safety of other equipment of the space station can be protected, the developed patent technology can also be applied to other equipment of the space station needing nixie tube display, and beneficial reference can be provided for the design of the equipment needing the nixie tube display technology in other radiation environments such as aerospace, aviation, national defense and the like.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of an aerospace-grade nixie tube display driving circuit according to the present invention.
In the figure: 1-a reset circuit; 2-a power conversion circuit; 3-logic OR gate circuit; 4-a latch; 5-a first relay; 6-a second relay; 7-a third relay; 8-a first LED nixie tube; 9-a second LED nixie tube; 10-third LED nixie tube.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In one embodiment of the present invention, as shown in fig. 1, an aerospace-grade nixie tube display driving circuit includes a reset circuit 1, a power conversion circuit 2 and a dynamic refresh common cathode nixie tube circuit, in the present invention, the reset circuit 1 is a domestic CAST-grade JR706RD circuit, and the power conversion circuit 2 is a domestic CAST-grade LS883 circuit. The power input pin VCC of the reset circuit 1 is connected with the same partition power supply Vdd1 of the device processor, the watchdog input pin WDI of the reset circuit 1 is connected with the general output pin VMU _ OUT1 of the device processor, the watchdog output pin WDO of the reset circuit 1 is connected with the reset input pin/MR of the reset circuit 1, and the reset output pin/RST of the reset circuit 1 is connected with the reset pin VMU _ RST of the device processor and the reset pin CLR of the dynamic refresh common cathode nixie tube circuit. The voltage monitoring output pin PFO of the reset circuit 1 is connected with the switch pin OFF of the power conversion circuit 2, the power input pin IN and the low-power input pin LBI of the power conversion circuit 2 are connected with the equipment main power supply Vcc, the feedback pin SET and the ground pin GND of the power conversion circuit 2 are grounded, the power output pin OUT of the power conversion circuit 2 is connected with the power input pin VCC of the dynamic refresh common cathode nixie tube circuit and the voltage monitoring input pin PFI of the reset circuit 1, and the power output pin OUT of the power conversion circuit 2 is used as an output display driving power supply Vdd2, namely, the power input pin VCC of the dynamic refresh common cathode nixie tube circuit and the voltage monitoring input pin PFI of the reset circuit 1 are connected with the output display driving power supply Vdd 2. A voltage division circuit is connected between a voltage monitoring input pin PFI of the reset circuit 1 and a power output pin OUT of the power conversion circuit 2, and the voltage monitoring input pin PFI of the reset circuit 1 is connected to a general output input pin VMU _ IO1 of the device processor. As shown in fig. 1, preferably, the voltage dividing circuit includes a pull-up resistor and a pull-down resistor arranged according to a preset ratio, one end of the pull-up resistor is connected to the power output pin OUT of the power conversion circuit 2, one end of the pull-down resistor is grounded, and the other end of the pull-up resistor is connected to the other end of the pull-down resistor and then connected to the voltage monitoring input pin PFI of the reset circuit 1.
The reset circuit 1 can realize system power-on reset, system power-off reset and system watchdog reset, and can automatically detect and power off (namely, latch automatic power off) software power-on, software power-off and hardware power-on of the display driving power supply Vdd 2; the power conversion circuit 2 realizes current-limiting power supply to the display drive power supply.
As a preferred embodiment of the present invention, as shown in fig. 1, the dynamic refresh common cathode nixie tube circuit includes a logic or gate circuit 3, a latch 4, a first relay 5, a second relay 6, a third relay 7, a first LED nixie tube 8, a second LED nixie tube 9 and a third LED nixie tube 10, in the present invention, the logic or gate circuit 3 is a domestic CAST-grade B54AC32 circuit, the latch 4 is a domestic CAST-grade B54AC273 latch, the first relay 5, the second relay 6 and the third relay 7 are domestic CAST-grade 1JG2-3 solid state relays, the first LED nixie tube 8, the second LED nixie tube 9 and the third LED nixie tube 10 are domestic G + grade BS241 nixie tubes, and the first LED nixie tube 8, the second LED nixie tube 9 and the third LED nixie tube 10 are seven-segment nixie tubes. In the present invention, the first LED nixie tube 8 is used to display minutes and letters, and the second LED nixie tube 9 and the third LED nixie tube 10 are used to display seconds and letters.
The clear pin CLR and the power input pin VCC of the latch 4 are the clear pin CLR and the power input pin VCC of the dynamic refresh common cathode nixie tube circuit, that is, the clear pin CLR of the latch 4 is connected to the reset output pin/RST of the reset circuit 1, and the power input pin VCC of the latch 4 is connected to the display driving power supply Vdd 2.
The first input pin and the second input pin of the logical OR gate circuit 3 are correspondingly connected with a chip selection signal pin VMU _ CS and a write signal pin VMU _ WE of the device processor, and the output pin of the logical OR gate circuit 3 is connected with the write signal pin CLK of the latch 4.
An 8-bit data input pin D (namely D [0:7]) of the latch 4 is correspondingly connected with an 8-bit data bus VMU _ D (namely VMU _ D [0:7]) of the equipment processor, a front 7-bit data output pin Q (namely Q [0:6]) of the latch 4 is respectively connected with 7 input pins of a first LED nixie tube 8, a second LED nixie tube 9 and a third LED nixie tube 10 in series after being connected with a current limiting resistor in series, an 8-bit data output pin Q (namely Q [7]) of the latch 4 is connected with a decimal point pin DP of the first LED nixie tube 8 in series after being connected with the current limiting resistor in series, and decimal points DP of the second LED nixie tube 9 and the third LED nixie tube 10 are grounded. Preferably, the first 7-bit data output pin Q of the latch 4 is connected in series with two current-limiting resistors, respectively, and the 8 th-bit data output pin Q of the latch 4 is connected in series with two current-limiting resistors. The logical OR of the chip select signal pin VMU _ CS and the write signal pin VMU _ WE of the device processor produces a rising edge of the CLK signal that latches the 8 bits of data on the data bus VMU _ D [0:7] of the device processor to its output Q [0:7 ].
The ground pins GND of the first LED nixie tube 8, the second LED nixie tube 9 and the third LED nixie tube 10 are correspondingly connected with the load positive terminal pins of the first relay 5, the second relay 6 and the third relay 7, and the load negative terminal pins of the first relay 5, the second relay 6 and the third relay 7 are grounded. Namely, the common cathodes of the first LED nixie tube 8, the second LED nixie tube 9 and the third LED nixie tube 10 are respectively connected to the load positive terminal pins of the first relay 5, the second relay 6 and the third relay 7.
The control positive terminal pins of the first relay 5, the second relay 6 and the third relay 7 are correspondingly connected with the universal output pins VMU _ OUT2, VMU _ OUT3 and VMU _ OUT4 of the equipment processor, and the control negative terminal pins of the first relay 5, the second relay 6 and the third relay 7 are grounded. Preferably, the control positive terminal pins and the control negative terminal pins of the first relay 5, the second relay 6 and the third relay 7 are respectively connected with 100pf filter capacitors.
In a specific embodiment, the LED nixie tube display driving circuit for an aerospace-grade electric appliance microwave oven is applied to the aerospace-grade microwave oven, the voltage of a power supply Vdd1 in the same partition of a microwave oven processor is 5V, the voltage of a general output pin VMU _ OUT1 of the microwave oven processor is 0-5V, the voltage of a reset pin VMU _ RST of the microwave oven processor is 0-5V, the voltage of a total power supply Vcc of the microwave oven is 5.3V, the voltage of a display driving power supply Vdd2 output by a power supply output pin OUT of a power supply conversion circuit 2 is 5V, the voltage of a general output pin VMU _ IO1 of the microwave oven processor is 0-5V, the signal voltages of a chip selection signal VMU _ CS and a write signal pin VMU _ WE of the microwave oven processor are 0-5V, the voltages of general output pins VMU _ OUT2, VMU _ OUT3 and VMU _ OUT4 of the microwave oven processor are 0-5V, the resistance of the pull-up resistor is 220K omega, the resistance of the pull-down resistor is 100K omega, and the resistance of the current-limiting resistor is 220 omega. The microwave oven of the invention shows that the driving power supply 5Vdd2 is connected to the voltage monitoring input pin PFI (threshold voltage is 1.25V, PFO is high when the threshold voltage is more than 1.25V, and PFO is low when the threshold voltage is less than 1.25V) after resistor voltage division, therefore, the voltage dividing resistor can monitor the power supply state of 5Vdd2 lower than 4V.
In conjunction with an aerospace-grade microwave oven to which an aerospace-grade nixie tube display driving circuit of the invention is applied, the working method of the circuit of the invention is described as follows: the system is powered on and reset, the reset is finished, the microwave oven processor starts to run an initialization program, the corresponding bits of output registers of general output and input pins 5VMU _ IO1, 5VMU _ OUT2, 5VMU _ OUT3 and 5VMU _ OUT4 are set to be low, and the output registers are set as output ports; setting the output height of a general output input pin 5VMU _ IO1 to be about 5ms, powering up a display driving circuit, then setting a general output input pin 5VMU _ IO1 as an input port, and inquiring the power-up state of the driving circuit by microwave oven processor software through the pin; in the normal display state work, the microwave oven processor software opens the solid state relay of the corresponding control nixie tube within 10ms of the refreshing time period, writes seven-segment code data of the corresponding nixie tube to the latch, then closes the corresponding control solid state relay after delaying for about 1ms, and the software carries out the processes according to the minute nixie tube, the ten second nixie tube and the second nixie tube in sequence; if the display circuit is subjected to single event latch, the suddenly increased power consumption enables the output voltage 5Vdd2 of the power supply conversion circuit LS883 to be quickly reduced, and if the output voltage 5Vdd2 is reduced to be less than 4V, the voltage monitoring output pin PFO of the reset circuit JR706RD is low, the output of the power supply conversion circuit LS883 is immediately closed, and the phenomenon that a device is burnt out due to large current for a long time is avoided.
The invention develops a display driving circuit of an aerospace-level nixie tube, which is applied to a space station kitchen heating microwave oven emitted by China, wherein in a long-term flight task of the space station for over ten years, a astronaut working and living in the space station kitchen heating microwave oven regularly uses the microwave oven to heat delicious space food for eating for a plurality of times every day, an LED nixie tube of the microwave oven displays an application circuit in a space irradiation resisting environment, and heating parameters, microwave oven running state information and alarm information set by the astronaut are displayed with high reliability, so that the astronaut can timely master the working state of the space station microwave oven and adopt corresponding countermeasures, and timely adopt corresponding measures to avoid accidents under the condition of fault display of the nixie tube, thereby ensuring that the astronaut can eat delicious food every day to maintain the health and fully finish the work task of the space station; the personal safety of astronauts and the operation safety of other equipment of the space station can be protected, the developed patent technology can also be applied to other equipment of the space station needing nixie tube display, and beneficial reference can be provided for the design of the equipment needing the nixie tube display technology in other radiation environments such as aerospace, aviation, national defense and the like.
The invention selects nationwide aerospace level components, develops a display driving circuit of an aerospace level nixie tube based on a space anti-irradiation design technology and a dynamic refreshing nixie tube common cathode connection method, is successfully applied to a kitchen microwave heating microwave oven of a space station in China launched in 2021, completes tasks of heating food and the like of the space station along with long-term flight of the space station, and has the following advantages:
all domestic aerospace-level components: all domestic aerospace-grade components are selected, the autonomous controllable degree of the components is greatly improved, the space application reliability of an application circuit is improved, and the huge risk that subsequent products cannot be produced due to the fact that imported high-grade components are selected and sold in western countries is avoided.
Radiation resistance: except that the components and parts adopt high-grade aerospace grade, in the design technology of the LED nixie tube display driving circuit, the independent current-limiting power supply technology that the software of an equipment processor can control the power supply of the display driving circuit to be powered on and detected, and the power supply voltage hardware of the driving circuit to be automatically detected and powered off is adopted; the circuit anti-space single particle latch capability is greatly improved, the damage of components caused by single particle latch in space application is avoided, and the capability of the nixie tube display circuit adapting to space environment application is improved.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. An aerospace-grade nixie tube display driving circuit is characterized by comprising a reset circuit (1), a power supply conversion circuit (2) and a dynamic refreshing common cathode nixie tube circuit, wherein a power supply input pin VCC of the reset circuit (1) is connected with a power supply Vdd1 which is the same with a partition of a device processor, a watchdog input pin WDI of the reset circuit (1) is connected with a general output pin VMU _ OUT1 of the device processor, a watchdog output pin WDO of the reset circuit (1) is connected with a reset input pin/MR of the reset circuit (1), a reset output pin/RST of the reset circuit (1) is connected with a reset pin VMU _ RST of the device processor and a clear CLR of the refreshing common cathode nixie tube circuit, a voltage monitoring output pin PFO of the reset circuit (1) is connected with a switch pin OFF of the power supply conversion circuit (2), the power input pin IN and the low-power input pin LBI of the power conversion circuit (2) are connected with a device main power supply Vcc, the feedback pin SET and the ground pin GND of the power conversion circuit (2) are grounded, the power output pin OUT of the power conversion circuit (2) is connected with the power input pin VCC of the dynamic refresh common cathode nixie tube circuit and the voltage monitoring input pin PFI of the reset circuit (1), a voltage division circuit is connected between the voltage monitoring input pin PFI of the reset circuit (1) and the power output pin OUT of the power conversion circuit (2), and the voltage monitoring input pin PFI of the reset circuit (1) is connected with a general output input pin VMU _ IO1 of a device processor.
2. The aerospace grade nixie tube display driving circuit according to claim 1, wherein the dynamic refreshing common cathode nixie tube circuit comprises a logic or gate circuit (3), a latch (4), a first relay (5), a second relay (6), a third relay (7), a first LED nixie tube (8), a second LED nixie tube (9) and a third LED nixie tube (10), and the clear pin CLR and the power input pin VCC of the latch (4) are the clear pin CLR and the power input pin VCC of the dynamic refreshing common cathode nixie tube circuit; a first input pin and a second input pin of the logic or gate circuit (3) are correspondingly connected with a chip selection signal pin VMU _ CS and a write signal pin VMU _ WE of the equipment processor, an output pin of the logic or gate circuit (3) is connected with a write signal pin CLK of the latch (4), an 8-bit data input pin D of the latch (4) is correspondingly connected with an 8-bit data bus VMU _ D of the equipment processor, a front 7-bit data output pin Q of the latch (4) is respectively connected with 7 input pins of the first LED nixie tube (8), the second LED nixie tube (9) and the third LED nixie tube (10) in series after being connected with a current limiting resistor in series, a 8-bit data output pin Q of the latch (4) is connected with a decimal pin DP of the first LED nixie tube (8) after being connected with a current limiting resistor in series, and the first LED nixie tube (8), The ground pins GND of the second LED nixie tube (9) and the third LED nixie tube (10) are correspondingly connected with the load positive pins of the first relay (5), the second relay (6) and the third relay (7), the control positive pins of the first relay (5), the second relay (6) and the third relay (7) are correspondingly connected with the universal output pins VMU _ OUT2, VMU _ OUT3 and VMU _ OUT4 of the equipment processor, the first LED nixie tube (8) is used for displaying minutes and letters, and the second LED nixie tube (9) and the third LED nixie tube (10) are used for displaying seconds and letters.
3. The aerospace grade digital tube display driving circuit as claimed in claim 2, wherein the first 7 data output pins Q of the latch (4) are respectively connected in series with two of the current limiting resistors, and the 8 th data output pin Q of the latch (4) is connected in series with two of the current limiting resistors.
4. The aerospace grade nixie tube display driver circuit according to claim 2, wherein the decimal point pins DP of the second LED nixie tube (9) and the third LED nixie tube (10) are grounded.
5. The aerospace grade nixie tube display driver circuit of claim 2, wherein the load negative terminal pin and the control negative terminal pin of the first relay (5), the second relay (6) and the third relay (7) are grounded.
6. The aerospace grade nixie tube display driving circuit according to claim 2, wherein the logic or gate circuit (3) is a domestic CAST grade B54AC32 circuit, the latch (4) is a domestic CAST grade B54AC273 latch, the first relay (5), the second relay (6) and the third relay (7) are domestic CAST grade 1JG2-3 solid state relays, and the first LED nixie tube (8), the second LED nixie tube (9) and the third LED nixie tube (10) are domestic G + grade BS241 nixie tubes.
7. The aerospace-grade nixie tube display driving circuit according to claim 1, wherein the voltage dividing circuit comprises a pull-up resistor and a pull-down resistor arranged according to a preset ratio, one end of the pull-up resistor is connected to a power output pin OUT of the power conversion circuit (2), one end of the pull-down resistor is grounded, and the other end of the pull-up resistor is connected to the other end of the pull-down resistor and then connected to a voltage monitoring input pin PFI of the reset circuit (1).
8. The aerospace grade nixie tube display driver circuit according to claim 1, wherein the reset circuit (1) is a domestic CAST grade JR706RD circuit.
9. The aerospace grade nixie tube display driving circuit as claimed in claim 1, wherein the power conversion circuit (2) is a domestic CAST grade LS883 circuit.
10. Use of an aerospace grade nixie tube display driver circuit according to any one of claims 1 to 9 in an aerospace grade microwave oven.
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| CN202110662028.1A CN113380167A (en) | 2021-06-15 | 2021-06-15 | Aerospace-grade nixie tube display driving circuit and application thereof |
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| CN202110662028.1A CN113380167A (en) | 2021-06-15 | 2021-06-15 | Aerospace-grade nixie tube display driving circuit and application thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114005406A (en) * | 2021-10-28 | 2022-02-01 | 西安微电子技术研究所 | OLED display circuit |
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