CN204836107U - Machine carries incident signal acquisition circuit - Google Patents
Machine carries incident signal acquisition circuit Download PDFInfo
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- CN204836107U CN204836107U CN201520519565.0U CN201520519565U CN204836107U CN 204836107 U CN204836107 U CN 204836107U CN 201520519565 U CN201520519565 U CN 201520519565U CN 204836107 U CN204836107 U CN 204836107U
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Abstract
The utility model discloses a machine carries incident signal acquisition circuit comprises last pull -down circuit (1), filtering protection circuit (2), the comparison circuit that stagnates back (3) and secondary modulate circuit (4). The utility model provides a machine carries incident signal acquisition circuit realizes the collection of incident signal through divider resistance, stabilivolt and the comparator that stagnates back, replaces and carries out the design method that the machine carried incident signal acquisition through the opto -coupler in the past. Having solved in the past and having carried out the machine when carrying incident signal acquisition with the opto -coupler, it is fixed to gather incident signal type, signal upset threshold value indefinite limitation.
Description
Technical field
The utility model belongs to electronic technology class, is applied to avionics field, is specifically related to a kind of airborne event signal Acquisition Circuit.
Background technology
Event signal is a kind of index signal of the aircraft airborne equipment course of work, more conventional in airborne equipment, and conventional event signal type has high/low multilevel type and ground/void type.Such as, fuel consumption parameter in machine top tank is exactly a kind of event signal, and airborne equipment just can calculate the consumption of fuel tank intermediate fuel oil by the number gathering this event signal.
Traditional airborne event signal Acquisition Circuit as shown in Figure 1; this airborne event signal Acquisition Circuit inputs modulate circuit, optical coupling isolation circuit and signal output apparatus by event signal and forms, and is provided with between overvoltage crowbar, input and output and is isolated by optocoupler in input signal conditioning circuit.The advantage of this circuit is that Acquisition Circuit is simple, gathers reliable and stable, the event signal of analog type on machine can be converted to the low and high level that controller can gather.But shortcoming also clearly: 1) this circuit can only gather the event signal of low and high level type, and cannot gather for the event signal of ground/void type; 2) optocoupler is current drive-type device, and therefore this circuit needs event signal source to have the drive current of milliampere rank; 3) the current transfer ratio discreteness of optocoupler is larger, therefore the turn threshold nursed one's health source signal of this circuit is uncontrollable, such as same circuit, some optocouplers will drive the circuit of rear end when 5V inputs, and some optocouplers may need 8V could drive the circuit of rear end.
Utility model content
The purpose of this utility model is to provide a kind of airborne event signal Acquisition Circuit, can solve that conventional event signal acquisition circuit collection event signal type is fixed, the uncontrollable defect of turn threshold.
Design a kind of novel event signal Acquisition Circuit, by discrete components such as resistance, electric capacity, voltage-stabiliser tube, comparators, build a kind of airborne event signal Acquisition Circuit, can by unified for event mode signal dissimilar on the machine signal type nursed one's health into a kind of controller and can identify.
Consider the problems referred to above of prior art, an aspect disclosed in the utility model, the utility model by the following technical solutions:
A kind of airborne event signal Acquisition Circuit, is made up of upper pull-down circuit (1), filter protective circuit (2), hysteresis comparison circuit (3) and secondary modulate circuit (4);
Airborne event input signal carries out the process of unlike signal type through upper pull-down circuit (1), described upper pull-down circuit (1) is made up of pull-up resistor R1, pull down resistor R3 and isolation resistance R2, one end of pull-up resistor R1 is connected to power supply, the other end is connected to one end of isolation resistance R2, one end of pull down resistor R3 is connected to the earth, the other end is connected to other one end of R2, and the output of upper pull-down circuit (1) is connected to the input of filter protective circuit (2); When the event signal type inputted is low and high level, not fit on pull-up resistor R1 and pull down resistor R3 in upper pull-down circuit (1); When the event signal type inputted is ground/void type, pull-up resistor R1 and pull down resistor R3 needs assembling, by upper pull-down circuit, ground/void type is processed into low and high level type;
Filter protective circuit (2) carries out filtering process to input signal, and voltage stabilizing process is carried out to protect the hysteresis comparison circuit (3) of rear end to the event signal of input, filter protective circuit (2) is made up of voltage-stabiliser tube V and filter capacitor C, the V of voltage-stabiliser tube is used for carrying out voltage stabilizing to input signal, its negative terminal is connected to the output of pull-down circuit (1), anode connects the earth, isolation resistance R2 in filter capacitor C and upper pull-down circuit (1), form a low pass filter, High-frequency Interference on the airborne event input signal of filtering, the output of filter protective circuit (2) is connected to the input of hysteresis comparison circuit (3),
Airborne event input signal after filter protective circuit (2) processes by hysteresis comparison circuit (3) is converted to the square-wave signal that amplitude is ± 15V, hysteresis comparison circuit (3) has hysteretic characteristic simultaneously, thus to the fluctuation of the signal of input, there is Anti-Jamming, hysteresis comparison circuit (3) is by threshold value divider resistance R4, R5, comparator anode feedback resistance R6, comparator N1 and pull-up resistor R7 forms, threshold value divider resistance R4 one end connect threshold divider resistance R5, the other end connects the anode of comparator N1, one end of threshold value divider resistance R5 is connected to power supply, one end is connected to the anode of threshold value divider resistance R4 and comparator N1 in addition, comparator anode feedback resistance R6 one end is connected to the anode of comparator N1, one end is connected to the output of comparator N1 in addition, one end of pull-up resistor R7 is connected to power supply, the other end is connected to the output of comparator N1, the negative terminal of comparator N1 is connected to the output of filter protective circuit (2),
Hysteresis comparison circuit (3) is converted to by secondary modulate circuit (4) ± and to be converted to amplitude be that the square-wave signal of+3.3V exports to 15V square-wave signal, secondary modulate circuit (4) is made up of the metal-oxide-semiconductor D of resistance R8 and N raceway groove, the cut-in voltage VGS of metal-oxide-semiconductor D is 1-2V, when the signal that hysteresis comparison circuit (3) exports is for+15V, the magnitude of voltage being somebody's turn to do+15V is greater than the cut-in voltage VGS of metal-oxide-semiconductor, metal-oxide-semiconductor D conducting, the output of metal-oxide-semiconductor is low level; When the signal that hysteresis comparison circuit (3) exports is for-15V, the magnitude of voltage being somebody's turn to do-15V is less than the cut-in voltage VGS of metal-oxide-semiconductor, and metal-oxide-semiconductor D ends, and the output of metal-oxide-semiconductor is+3.3V.
A kind of novel airborne event signal Acquisition Circuit that the utility model proposes, carrys out the collection of realization event signal by divider resistance, voltage-stabiliser tube and hysteresis loop comparator, replace the method for designing of in the past being carried out airborne event signal collection by optocoupler.Solve in the past with optocoupler carry out airborne event signal gather time, collection event signal type is fixed, the limitation that signal turn threshold is indefinite.
Accompanying drawing explanation
Fig. 1 is airborne event signal Acquisition Circuit figure in prior art;
Fig. 2 is the schematic block circuit diagram of the airborne event signal Acquisition Circuit of the utility model;
Fig. 3 is the circuit diagram of the airborne event signal Acquisition Circuit of the utility model.
Embodiment
Below in conjunction with embodiment, the utility model is described in further detail, but execution mode of the present utility model is not limited thereto.
Consult Fig. 2, a kind of airborne event signal Acquisition Circuit, be made up of upper pull-down circuit (1), filter protective circuit (2), hysteresis comparison circuit (3) and secondary modulate circuit (4).
Airborne event input signal carries out the process of unlike signal type through upper pull-down circuit (1): when the event signal type of input is low and high level, not fit on pull down resistor in upper pull-down circuit (1); When the event signal type inputted is ground/void type, by upper pull-down circuit, ground/void type is nursed one's health into low and high level type.
Filter protective circuit (2) carries out filtering process to input signal, and carries out clamp process to protect the hysteresis comparison circuit (3) of rear end to the event signal of input.Hysteresis comparison circuit (3) filter protective circuit (2) is nursed one's health after event input signal be converted to the square-wave signal that amplitude is ± 15V; utilize " hysteresis " characteristic of hysteresis loop comparator simultaneously, to the fluctuation of the signal of input, there is anti-interference function.The square-wave signal of ± 15V is converted to the square-wave signal that amplitude is+3.3V by secondary modulate circuit (4), with ensure the signal level that exports can bear by the director port of rear end,
Consult Fig. 3: upper pull-down circuit (1) is made up of pull-up resistor R1, pull down resistor R3 and isolation resistance R2, one end of pull-up resistor R1 is connected to power supply, the other end is connected to one end of isolation resistance R2, one end of pull down resistor R3 is connected to the earth, and the other end is connected to other one end of R2.Upper pull-down circuit (1) mainly designs for the different input types of event signal, and when the event type inputted is low and high level, pull-up resistor R1 and pull down resistor R3 can arbitrarily assemble.When input event type for ground/open type time; pull-up resistor R1 and pull down resistor R3 needs assembling; the event signal of in this wise/void type is just converted to the signal type of low and high level after upper pull-down circuit (1), and the output of upper pull-down circuit (1) is connected to the input of filter protective circuit (2).
Filter protective circuit (2) is made up of voltage-stabiliser tube V and filter capacitor C; the negative terminal of the V of voltage-stabiliser tube is connected to the output of pull-down circuit (1); for carrying out voltage stabilizing to input signal; to protect the hysteresis comparison circuit (3) of rear end; isolation resistance R2 in filter capacitor C and upper pull-down circuit (1); form a low pass filter, can High-frequency Interference in filtering bus.The output of filter protective circuit (2) is connected to the input of hysteresis comparison circuit (3).
Hysteresis comparison circuit (3) is by threshold value divider resistance R4, R5, comparator anode feedback resistance R6, comparator N1 and pull-up resistor R7 forms, threshold value divider resistance R4 one end connect threshold divider resistance R5, the other end connects the anode of comparator N1, one end of threshold value divider resistance R5 is connected to power supply, one end is connected to the anode of threshold value divider resistance R4 and comparator N1 in addition, comparator anode feedback resistance R6 one end is connected to the anode of comparator N1, one end is connected to the output of comparator N1 in addition, the negative terminal of comparator N1 is connected to the output of filter protective circuit (2).Hysteresis comparison circuit (3) filter protective circuit (2) is nursed one's health after event input signal be converted to the square-wave signal that amplitude is ± 15V; utilize " hysteresis " characteristic of hysteresis loop comparator simultaneously, to the fluctuation of the signal of input, there is anti-interference function.
Secondary modulate circuit (4) is made up of the metal-oxide-semiconductor D of resistance R8 and N raceway groove, the cut-in voltage VGS of metal-oxide-semiconductor D is 1 ~ 2V, when the signal that hysteresis comparison circuit (3) exports is for+15V, the magnitude of voltage being somebody's turn to do+15V is greater than the cut-in voltage VGS of metal-oxide-semiconductor, metal-oxide-semiconductor D conducting, the output of metal-oxide-semiconductor is low level; When the signal that hysteresis comparison circuit (3) exports is for-15V, the magnitude of voltage being somebody's turn to do-15V is less than the cut-in voltage VGS of metal-oxide-semiconductor, and metal-oxide-semiconductor D ends, and the output of metal-oxide-semiconductor is+3.3V.Utilize the switching characteristic of metal-oxide-semiconductor, by the amplitude that hysteresis comparison circuit (3) exports be ± the pulse form signal condition of 15V becomes the pulse form signal of+3.3V, controller to the pulse signal of canonical form along carrying out collection statistics, can calculate the number of front end analogue signal type event signal.
Claims (1)
1. an airborne event signal Acquisition Circuit, is made up of upper pull-down circuit (1), filter protective circuit (2), hysteresis comparison circuit (3) and secondary modulate circuit (4);
Airborne event input signal carries out the process of unlike signal type through upper pull-down circuit (1), described upper pull-down circuit (1) is made up of pull-up resistor R1, pull down resistor R3 and isolation resistance R2, one end of pull-up resistor R1 is connected to power supply, the other end is connected to one end of isolation resistance R2, one end of pull down resistor R3 is connected to the earth, the other end is connected to other one end of R2, and the output of upper pull-down circuit (1) is connected to the input of filter protective circuit (2); When the event signal type inputted is low and high level, not fit on pull-up resistor R1 and pull down resistor R3 in upper pull-down circuit (1); When the event signal type inputted is ground/void type, pull-up resistor R1 and pull down resistor R3 needs assembling, by upper pull-down circuit, ground/void type is processed into low and high level type;
Filter protective circuit (2) carries out filtering process to input signal, and voltage stabilizing process is carried out to protect the hysteresis comparison circuit (3) of rear end to the event signal of input, filter protective circuit (2) is made up of voltage-stabiliser tube V and filter capacitor C, the V of voltage-stabiliser tube is used for carrying out voltage stabilizing to input signal, its negative terminal is connected to the output of pull-down circuit (1), anode connects the earth, isolation resistance R2 in filter capacitor C and upper pull-down circuit (1), form a low pass filter, High-frequency Interference on the airborne event input signal of filtering, the output of filter protective circuit (2) is connected to the input of hysteresis comparison circuit (3),
Airborne event input signal after filter protective circuit (2) processes by hysteresis comparison circuit (3) is converted to the square-wave signal that amplitude is ± 15V, hysteresis comparison circuit (3) has hysteretic characteristic simultaneously, thus to the fluctuation of the signal of input, there is Anti-Jamming, hysteresis comparison circuit (3) is by threshold value divider resistance R4, R5, comparator anode feedback resistance R6, comparator N1 and pull-up resistor R7 forms, threshold value divider resistance R4 one end connect threshold divider resistance R5, the other end connects the anode of comparator N1, one end of threshold value divider resistance R5 is connected to power supply, one end is connected to the anode of threshold value divider resistance R4 and comparator N1 in addition, comparator anode feedback resistance R6 one end is connected to the anode of comparator N1, one end is connected to the output of comparator N1 in addition, one end of pull-up resistor R7 is connected to power supply, the other end is connected to the output of comparator N1, the negative terminal of comparator N1 is connected to the output of filter protective circuit (2),
Hysteresis comparison circuit (3) is converted to by secondary modulate circuit (4) ± and to be converted to amplitude be that the square-wave signal of+3.3V exports to 15V square-wave signal, secondary modulate circuit (4) is made up of the metal-oxide-semiconductor D of resistance R8 and N raceway groove, the cut-in voltage VGS of metal-oxide-semiconductor D is 1-2V, when the signal that hysteresis comparison circuit (3) exports is for+15V, the magnitude of voltage being somebody's turn to do+15V is greater than the cut-in voltage VGS of metal-oxide-semiconductor, metal-oxide-semiconductor D conducting, the output of metal-oxide-semiconductor is low level; When the signal that hysteresis comparison circuit (3) exports is for-15V, the magnitude of voltage being somebody's turn to do-15V is less than the cut-in voltage VGS of metal-oxide-semiconductor, and metal-oxide-semiconductor D ends, and the output of metal-oxide-semiconductor is+3.3V.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520519565.0U CN204836107U (en) | 2015-07-17 | 2015-07-17 | Machine carries incident signal acquisition circuit |
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| CN201520519565.0U CN204836107U (en) | 2015-07-17 | 2015-07-17 | Machine carries incident signal acquisition circuit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106849911A (en) * | 2017-03-08 | 2017-06-13 | 西北工业大学 | A kind of unmanned aerial vehicle onboard overload measurement trigger with control interface |
| CN112098762A (en) * | 2020-09-22 | 2020-12-18 | 陕西千山航空电子有限责任公司 | Discrete switching value acquisition and detection circuit |
| CN116749811A (en) * | 2023-08-10 | 2023-09-15 | 湖南艾德迅电气科技股份有限公司 | Intelligent charger for new energy automobile |
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2015
- 2015-07-17 CN CN201520519565.0U patent/CN204836107U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106849911A (en) * | 2017-03-08 | 2017-06-13 | 西北工业大学 | A kind of unmanned aerial vehicle onboard overload measurement trigger with control interface |
| CN106849911B (en) * | 2017-03-08 | 2019-07-19 | 西北工业大学 | A kind of unmanned aerial vehicle onboard overload measurement trigger with control interface |
| CN112098762A (en) * | 2020-09-22 | 2020-12-18 | 陕西千山航空电子有限责任公司 | Discrete switching value acquisition and detection circuit |
| CN116749811A (en) * | 2023-08-10 | 2023-09-15 | 湖南艾德迅电气科技股份有限公司 | Intelligent charger for new energy automobile |
| CN116749811B (en) * | 2023-08-10 | 2023-10-31 | 湖南艾德迅电气科技股份有限公司 | Intelligent charger for new energy automobile |
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