CN108020792A - A kind of information detection and method - Google Patents

A kind of information detection and method Download PDF

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Publication number
CN108020792A
CN108020792A CN201711284421.1A CN201711284421A CN108020792A CN 108020792 A CN108020792 A CN 108020792A CN 201711284421 A CN201711284421 A CN 201711284421A CN 108020792 A CN108020792 A CN 108020792A
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CN
China
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signal
input
output
circuit
default
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CN201711284421.1A
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Chinese (zh)
Inventor
董志伟
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荣湃半导体(上海)有限公司
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Priority to CN201711284421.1A priority Critical patent/CN108020792A/en
Publication of CN108020792A publication Critical patent/CN108020792A/en

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/40Testing power supplies

Abstract

The invention discloses a kind of signal deteching circuit, including:Signal input module, spacer medium, and signal output module;Input signal and default detection signal are modulated by the signal input module, are modulated into the first signal;The spacer medium is connected with the signal input module, first signal is carried out isolation processing, and obtain secondary signal;The signal output module is connected with the spacer medium, and for detecting whether the secondary signal meets preset condition, when being unsatisfactory for, the secondary signal is modulated into the working signal for meeting the attachment device for the signal output module output terminal.The object of the present invention is to provide a kind of signal deteching circuit and method, when the signal for detecting input terminal input occurs abnormal, adjusts the working signal of end connection device after the signal that output terminal exports meets, there is provided the stability and security of work system.

Description

A kind of information detection and method

Technical field

The present invention relates to signal transmission technology field, more particularly to a kind of information detection and method.

Background technology

Digital signal isolator is mainly used for the transmission of digital signal, and digital isolation technology is usually used in environment of industrial network In fieldbus, military electronic systems, aero-space electronic equipment and Medical Devices, especially some application environments compare evil Bad occasion.A first cause using isolator is protection device (or people) from high-tension harm;Another is important The reason is that in order to eliminate noise.

There is following technical problem for current isolator:

1st, when the power information before isolation is during by isolation processing, there is power supply mistake in the power supply inputted after isolation The problem of effect, cause rear end connection device not work normally;There is the dangerous phenomenon such as all standing;

2nd, when the information of isolation is data message, the data information signal for isolating output is lost, and causes mess code occur Phenomenon, causes rear end connection device not work normally, and the component and device to rear end cause to impact, and have impact on job family The stability and security of system.

Based on the problem present on, this application provides the scheme for solving technical problem.

The content of the invention

The object of the present invention is to provide a kind of information detection and method, when the information for detecting input terminal input occurs When abnormal, adjustment output terminal output information meet after end connection device job information, there is provided the stability of work system with And security, further realize to input terminal loss of power, and in signal transmission dropout detection.

Technical solution provided by the invention is as follows:

A kind of information detection, including:MIM message input module, information isolation processing module, and message output module; Input signal and default detection signal are modulated by the signal input module, are modulated into the first signal;The spacer medium It is connected with the signal input module, first signal is subjected to isolation processing, and obtain secondary signal;The signal output Module is connected with the spacer medium, for detecting whether the secondary signal meets preset condition, when being unsatisfactory for, by described in Secondary signal is modulated into the working signal for meeting the attachment device for the signal output module output terminal.

In the present invention, after isolation processing when the signal for detecting input terminal input occurs abnormal, adjustment processing is defeated The signal of outlet output, make its meet after end connection device normal operation working signal, improve the stabilization of work system Property and security.

Preferably, the signal input module includes:Clock circuit, impulse generator and logical operation circuit;It is described Clock circuit is used to set the time cycle that detection signal triggering is preset described in first signal;The impulse generator root The time cycle set according to the clock circuit, generates the default detection signal corresponding with the clock cycle, institute It is pulse signal to state default detection signal;The logical operation circuit carries out the input signal and the default detection signal Logical operation, synthesis are loaded with the signal to be detected of the default detection signal, are first signal.

In the present invention, the clock cycle of default detection signal is set by clock circuit, according to the demand of user and The difference of working environment, dynamically realizes the setting to detecting frequency, and testing conditions are provided for output signal.

Preferably, the signal output module includes:Wave filter, timing detection circuit, numerical selector;The timing inspection Slowdown monitoring circuit is used for the operating status for detecting the secondary signal;The wave filter is used for according to the default of the default detection signal Frequency, filters out the default detection signal in the secondary signal;The numerical selector is used to be detected according to the timing The operating status of the secondary signal of electric circuit inspection, performs corresponding operating mode, it is exported the company that signal meets rear end The working signal of connection device.

In the present invention, wave filter, timing detection circuit, numerical selector are provided with signal output module;Realize Detection to signal condition to be detected, it is different according to the state of signal to be detected, different controls are adjusted by numerical selector Pattern, makes its signal exported after isolating meet work system operating status;Pass through the detection to inputting signal to be detected, a side Face can effectively avoid the unstability of isolator output terminal back-end device, it is reliably run;On the other hand can be with The effective service life for improving back-end device.

Preferably, including:When the timing detection circuit is detected in setting time in the secondary signal, there are institute When stating default detection signal, the timing detection circuit keeps current output control signal, and controls the numerical selector In for the first working method, after the wave filter filters out the default detection signal in the secondary signal, and will described in The input signal in secondary signal exports after the selector, for the connection of the signal output module output terminal The normal operation of device.

Preferably, further include:Do not deposited in the secondary signal when the timing detection circuit detects in setting time In the default detection signal, the timing detection circuit changes current output control signal, makes the numerical selector In for the second working method, controlling the numerical selector input terminal to receive default output signal, and further described in control Signal output module output terminal enters default working status;When the input signal of signal input module input is electricity During source signal, control the signal output module output terminal to recover power supply signal of the signal to be detected for normal work, make Work system enters working status;Or the control signal output module output terminal output protection signal, enter work system Guard mode;When the signal to be detected of signal input module input is data-signal, recover the signal output Module output terminal output signal is consistent with the input signal that the signal input module end inputs.

In the present invention, module, spacer medium, and signal output module are input a signal into and is packaged in one, is packaged into Isolator device, realizes that input signal is consistent with output signal by the circuit built in signal output module, on the one hand real Power-fail detection is showed, and has effectively been recovered;On the other hand the detection of abnormal data signal is realized, makes its further The normal signal of input terminal input is reverted to, ensure that the normal operation of work system and the output of safety and stability.

Preferably, further include:Trigger;The trigger is used to the input signal carrying out temporary processing, and sends To the clock circuit;The output terminal of the trigger signal input part with the clock circuit, logical operation circuit respectively First input end be electrically connected;The output terminal of the clock circuit also passes through the impulse generator and the logical operation circuit The second input terminal be electrically connected.

In the present invention, by setting trigger effectively to filter out the interference signal in input signal, namely burr, It is relative ideal signal to make input signal, and reliable guarantee is provided for the further processing of signal.

Preferably, further include:In signal driver, the signal input part of the driver and the signal input module The output terminal of the logical operation circuit is electrically connected, the signal output part of the driver and the signal input part electricity of spacer medium Connection.

Preferably, further include:Signal receiver, the input terminal of the signal receiver and the signal of the spacer medium are defeated Outlet is electrically connected;The output terminal of the signal receiver is electrically connected with the signal output module.

Preferably, the signal output module includes:The input terminal of the wave filter is inputted with the timing detection circuit The output terminal jointly with the signal receiver is held to be electrically connected;The input terminal of the filter output and the numerical selector It is electrically connected;The output terminal of the timing detection circuit is electrically connected with the numerical selector control terminal.

A kind of power detecting method, is applied in above-described signal deteching circuit, including:Step S100 signals are defeated Enter module to be modulated input signal and default detection signal, be modulated into the first signal;Step S200 spacer mediums are by described in First signal carries out isolation processing, and obtains secondary signal;Step S300 signal output modules are used to detect the secondary signal Whether meet preset condition, when being unsatisfactory for, the secondary signal is modulated into satisfaction and supplies the signal output module output terminal Connection device working signal.

In the present invention, when the signal for detecting input terminal input occurs abnormal, the signal of adjustment output terminal output is expired The working signal of end connection device after foot, there is provided the stability and security of work system.

Preferably, the step S100 includes:Step S110 clock circuits, which are set, presets inspection described in first signal Survey the time cycle of signal triggering;It is the time cycle that step S120 impulse generators are set according to the clock circuit, raw Into the default detection signal corresponding with the clock cycle, the default detection signal is pulse signal;Step S130 is patrolled Collect computing circuit and the input signal and the pulse detection signals are subjected to logical operation, synthesis is loaded with the default detection and believes Number the signal to be detected, be first signal.

In the present invention, the clock cycle of default detection signal is set by clock circuit, according to the demand of user and The difference of working environment, dynamically realizes the setting to detecting frequency, and testing conditions are provided for output signal.

Preferably, the step S300 includes:Step S310 timing detection circuit detects the operation shape of the secondary signal State;Step S320 wave filters filter out described default in the secondary signal according to the predeterminated frequency of the default detection signal Detect signal;The operating status for the secondary signal that step S330 numerical selectors are detected according to the timing detection circuit, Corresponding operating mode is performed, it is exported the working signal that signal meets the attachment device of rear end.

In the present invention, wave filter, timing detection circuit, numerical selector are provided with signal output module;Realize Detection to signal condition to be detected, it is different according to the state of signal to be detected, different controls are adjusted by numerical selector Pattern, makes its signal exported after isolating meet work system operating status;Pass through the detection to inputting signal to be detected, a side Face can effectively avoid the unstability of isolator output terminal back-end device, it is reliably run;On the other hand can be with The effective service life for improving back-end device.

Preferably, the step S330 includes:Step S331 is detected when the timing detection circuit in setting time There are during the default detection signal in the secondary signal, the timing detection circuit keeps current output control signal, And it is the first working method to control the numerical selector to be in, the wave filter filters out described default in the secondary signal After detecting signal, and the input signal in the secondary signal is exported after the selector, it is defeated for the signal Go out the normal operation of the device of the connection of module output terminal.

Preferably, further include:Step S331 is detected in the described second letter when the timing detection circuit in setting time There is no during the default detection signal in number, the timing detection circuit changes current output control signal, makes the number It is the second working method that word selector, which is in, controls the numerical selector input terminal to receive default output signal, and further The signal output module output terminal is controlled to enter default working status;When the input of signal input module input When signal is power supply signal, the signal output module output terminal is controlled to recover power supply of the signal to be detected for normal work Signal, makes work system enter working status;Or the control signal output module output terminal output protection signal, make job family System enters guard mode;When the signal to be detected of signal input module input is data-signal, it is defeated to recover the signal It is consistent with the input signal that the signal input module end inputs to go out module output terminal output signal.

In the present invention, module, spacer medium, and signal output module are input a signal into and is packaged in one, is packaged into Isolator device, realizes that input signal is consistent with output signal by the circuit built in signal output module, on the one hand real Power-fail detection is showed, and has effectively been recovered;On the other hand the detection of abnormal data signal is realized, makes its further The normal signal of input terminal input is reverted to, ensure that the normal operation of work system and the output of safety and stability.

A kind of signal deteching circuit provided by the invention and method, can bring following at least one beneficial effect:

1st, in the present invention, module, spacer medium, and signal output module are input a signal into and is packaged in one, is encapsulated Into isolator device, realize that input signal is consistent with output signal by the circuit built in signal output module, realize Power-fail detects, and abnormal signal recovers function.

2nd, in the present invention, it is signal by setting trigger effectively to filter out the interference signal in input signal Further processing reliable ensure is provided.

3rd, in the present invention, the validity for occurring power-fail by out-put supply after isolation is recovered, and ensure that rear end connects Connection device works normally;Avoid the occurrence of the dangerous phenomenon such as all standing, and the passiveness breakage of the device and component in work system The problem of;

4th, in the present invention, when the signal of isolation is data-signal, after the data-signal loss for realizing isolation output The function of recovering again, avoids the generation of the phenomenon of mess code in work system, work system is in controllable state, increase The stability and security of work system.

Brief description of the drawings

Below by a manner of clearly understandable, preferred embodiment is described with reference to the drawings, to a kind of signal deteching circuit and Above-mentioned characteristic, technical characteristic, advantage and its implementation of method are further described.

Fig. 1 is a kind of one embodiment structure chart of signal deteching circuit of the present invention;

Fig. 2 is a kind of another example structure figure of signal deteching circuit of the present invention;

Fig. 3 is a kind of another example structure figure of signal deteching circuit of the present invention;

Fig. 4 is a kind of another embodiment signal graph of signal deteching circuit of the present invention;

Fig. 5 is a kind of another embodiment signal graph of signal deteching circuit of the present invention;

Fig. 6 is a kind of another embodiment signal graph of signal deteching circuit of the present invention;

Fig. 7 is a kind of another embodiment signal graph of signal deteching circuit of the present invention;

Fig. 8 is a kind of another embodiment signal graph of signal deteching circuit of the present invention;

Fig. 9 is a kind of another embodiment signal graph of signal deteching circuit of the present invention;

Figure 10 is a kind of one embodiment signal graph of signal detecting method of the present invention;

Figure 11 is a kind of another embodiment signal graph of signal deteching circuit of the present invention.

Embodiment

In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, control is illustrated below The embodiment of the present invention.It should be evident that drawings in the following description are only some embodiments of the present invention, for For those of ordinary skill in the art, without creative efforts, other can also be obtained according to these attached drawings Attached drawing, and obtain other embodiments.

To make simplified form, part related to the present invention is only schematically show in each figure, they are not represented Its practical structures as product.In addition, so that simplified form readily appreciates, there is identical structure or function in some figures Component, only symbolically depicts one of those, or has only marked one of those.Herein, "one" is not only represented " only this ", can also represent the situation of " more than one ".

The present invention provides a kind of one embodiment of signal deteching circuit, with reference to shown in figure 1 and Figure 11, including:Signal Input module 100, spacer medium 200, and signal output module 300;The signal input module 100 is by input signal and in advance If detection signal is modulated, the first signal is modulated into;First signal is carried out isolation processing by spacer medium, and obtains the Binary signal;The signal output module 300 is used to detect whether the secondary signal meets preset condition, will when being unsatisfactory for The secondary signal is modulated into the working signal for meeting the attachment device for 300 output terminal of signal output module.

Specifically, in the present embodiment, realize power-fail detection, and the design of signal recovery circuitry;Such as this When application can be applied in a kind of signal isolator, the main function of isolator is the interference letter for removing isolator front end Number, provide safe and reliable signal for the load of rear end, the signal of input is monitored in real time to realize, then it is defeated in input terminal Enter and marking signal loaded on signal, for rear end according to marking signal judge by isolation output signal whether normal operation; When catching less than marking signal, then it is judged as power-fail, output terminal output default value.When signal is abnormal, then pass through The circuit realization built in signal output module is consistent with input signal by output signal, makes the signal of isolator output terminal normal Operation.Signal input module 100 in the present invention, spacer medium 200, and signal output module 300 are packaged in one, encapsulation Into signal isolator.Spacer medium in this application, including SIO2, light-passing plastic, ambroin etc..

In the present invention, after isolation processing when the signal for detecting input terminal input occurs abnormal, adjustment processing is defeated The signal of outlet output, make its meet after end connection device normal operation working signal, improve the stabilization of work system Property and security.

On the basis of above example, present invention also offers one embodiment;Refering to what is shown in Fig. 2, the signal is defeated Entering module includes:Clock circuit 110, impulse generator 120 and logical operation circuit 130;The clock circuit is used to set The time cycle of detection signal triggering is preset described in first signal;The impulse generator is set according to the clock circuit The time cycle put, the default detection signal corresponding with the clock cycle is generated, the default detection signal is Pulse signal;The input signal and the default detection signal are carried out logical operation by the logical operation circuit, and synthesis carries There is the signal to be detected of the default detection signal, be first signal.

Specifically, the signal input module in the present embodiment includes clock circuit 110, impulse generator 120 and patrol Collect computing circuit 130;Its connection relation is with reference to shown in figure 2;Input signal directly with clock circuit 110 and logical operation circuit 130 input terminal connection;The output terminal of clock circuit 110 is connected with the input terminal of impulse generator 120, impulse generator 120 Output terminal be connected with the input terminal of logical operation circuit 130, and carry out computing by logical operation circuit 130, and by computing Result send to back end signal driver 150.

On the basis of above example, one embodiment is additionally provided in the present invention;Refering to what is shown in Fig. 3, in signal The front end of input module 100 is also connected with a trigger 140;The output terminal of trigger 140 respectively with the clock circuit 110 Signal input part, the first input end of logical operation circuit 130 are electrically connected;The output terminal of the clock circuit 110 also passes through institute The second input terminal that impulse generator 120 is stated with the logical operation circuit 130 is electrically connected.Trigger 140 is used for will be described defeated Enter signal and carry out temporary processing, and send to the clock circuit.

One embodiment is provided in the present invention;Specifically with reference to shown in Fig. 1-3;Refering to what is shown in Fig. 5, isolator input terminal Input signal A cached by trigger after export, clock circuit produce a fixed clock cycle square-wave signal, i.e., A1 waveform signals;Impulse generator 120 is narrow according to one setting of saltus step generation of the rising edge or trailing edge of A1 waveform signals Pulse signal, namely A2 narrow pulse waveform signals, are also default detection signal;Mark using A2 as detection input signal, And load in input signal to be detected, logical operation process is carried out by logical operation circuit 130;Make input signal to be detected A produces burst pulse within the time of setting;Referring to the waveform of the middle A3 with reference to shown in figure 5;By A3 hair inputs into signal driver, Sent by spacer medium to signal output module 300.Trigger in this application, is Schmitt trigger, there is one kind The trigger of hysteresis effect.

In the present invention, trigger can by input signal according to the threshold value Shape correction of setting into metastable electricity Ordinary mail number, by the clock circuit and impulse generator of setting, and the signal of input is adjusted to be loaded with by logical operation circuit The signal to be detected of mark is detected, realizes that the detection to input signal provides reliable basis for the signal output module of rear end.

On the basis of above example, present invention also offers one embodiment;With reference to shown in figure 1 and Fig. 4;The letter Number output module 300 includes:Wave filter 310, timing detection circuit 320, numerical selector 330;The timing detection circuit 320 For detecting the operating status of the secondary signal;The wave filter 310 is used for the default frequency according to the default detection signal Rate, filters out the default detection signal in the secondary signal;The numerical selector 330 is used to be detected according to the timing The operating status of the secondary signal of electric circuit inspection, performs corresponding operating mode, it is exported the company that signal meets rear end The working signal of connection device.

On the basis of above example, present invention also offers one embodiment;With reference to shown in figure 4;Including:When described Timing detection circuit 320 detected in setting time in the secondary signal there are it is described it is default detection signal when, the meter When detection circuit 320 keep current output control signal, it is the first working method to be in the numerical selector 330, institute After stating the default detection signal that wave filter 100 is filtered out in the secondary signal, and will be described defeated in the secondary signal Enter signal to export after the selector, for the normal operation of the device of the connection of the signal output module output terminal.

On the basis of above example, present invention also offers one embodiment;With reference to shown in figure 4,5,6;Further include: When the timing detection circuit 320 is detected in the secondary signal in setting time there is no detection signal is preset, institute State timing detection circuit 320 and change current output control signal, it is the second work side to be in the numerical selector 330 Formula, controls 330 input terminal of numerical selector to receive default output signal, and further controls the signal output module defeated Outlet enters default working status;When the input signal of signal input module input is power supply signal, control The signal output module output terminal recovers power supply signal of the signal to be detected for normal work, work system is entered work Make state;Or the control signal output module output terminal output protection signal, work system is entered guard mode;When described When the signal to be detected of signal input module input is data-signal, recover the signal output module output terminal output letter Number with the signal input module end input the input signal it is consistent.

Specifically, in the present embodiment, with reference to shown in figure 4,5,6;Secondary signal passes through for input signal A3 (Fig. 4) to be detected Cross after spacer medium 200 exports to signal receiver, final output signal B, as shown in fig. 6, signal output module 300 is to it Signal B is detected processing, and normal and abnormal situation is included in detection process process;Pass through timing detection circuit 320 first Its signal B is detected, due to, there are burst pulse, judging signal in the time clocking internal detection circuit 320 of setting in signal B Whether there is burst pulse in B, the generation of rising edge and trailing edge, at this time the timing time of timing detection circuit 320 be greater than A1 Clock cycle;If it does, the signal of explanation output is normal, when signal to be detected is normal, signal B is consistent with A3, reference chart Shown in 6 and Fig. 5;And be filtered signal B by wave filter 310, the burst pulse in signal B is filtered out, namely filter out A2 letters Number;Filtered signal is changed into input signal A to be detected, and timing detection circuit 320 keeps current signal that signal does not occur, together When by the output terminal of numerical selector 330, the signal B3 of output is consistent with input signal A to be detected, altogether the normal work in rear end Make, shown in signal waveform Fig. 9 of output;If when an exception occurs, with reference to shown in figure 5 and 7;It is then to pass through timing detection circuit 320 couples of its signal B are detected, and be can't detect burst pulse in the time clocking internal detection circuit 320 of setting, are constantly in same Level state, is judged as exception, the level state of 320 output terminal of timing detection circuit is overturn, and controls digital choosing at this time The control terminal for selecting device 330 selects different input end signal, controls the selection acquiescence of numerical selector 330 end at this time, output with just The level signal of normal input signal A to be detected, plays the function of recovering level, or the connection circuit shape according to isolator rear end State, exports default value, ensures that back-end circuit is capable of the operating of normal reliable, in controllable state.

Further include in the present embodiment, with reference to shown in figure 8;When letter A to be detected breaths are data-signal, under normal circumstances, The signal of input to spacer medium after signal input module is handled is the A3 waveforms in Fig. 8, from spacer medium output Signal is shown in Ba;Ba equivalent to B in Fig. 6, it is filtered etc. go out after export the waveform of B3.Also there are another feelings at the same time Condition, namely abnormal situation, the signal of input to spacer medium after signal input module is handled are the A3 ripples in Fig. 8 Shape, the signal from spacer medium output are shown in Bc;As can be seen from Figure 8, initial signal, namely rising edge have been lacked in Bc Or trailing edge is certain, in this application by being loaded with default detection signal, namely narrow pulse signal in signal to be detected (id signal), when initial signal after the loss, can be by the rising edge or trailing edge signal of default detection signal, by it Abnormal signal is recovered within the time of setting, it is reverted to signal consistent with input signal A, and the signal after recovery is The signal of very short time has been lacked, but ensure that follow-up output is normal condition.

In the present invention, module, spacer medium, and signal output module are input a signal into and is packaged in one, is packaged into Isolator device, realizes that input signal is consistent with output signal by the circuit built in signal output module, on the one hand real Power-fail detection is showed, and has effectively been recovered;On the other hand the detection of abnormal data signal is realized, makes its further The normal signal of input terminal input is reverted to, ensure that the normal operation of work system and the output of safety and stability.

On the basis of above example, present invention also offers one embodiment;Further include:Signal receiver, it is described The input terminal of signal receiver is electrically connected with isolating device (such as capacitance) signal output part of the spacer medium;The signal connects The output terminal for receiving device is electrically connected with the signal output module.

On the basis of above example, present invention also offers one embodiment;The signal output module includes:Ginseng Examine shown in Fig. 4;The input terminal of the wave filter and the timing detection circuit input terminal are jointly defeated with the signal receiver Outlet is electrically connected;The filter output is electrically connected with the input terminal of the numerical selector;The timing detection circuit Output terminal is electrically connected with the numerical selector control terminal.

A kind of power detecting method, in the embodiment applied to above-described signal deteching circuit, with reference to figure 1 and 10 It is shown;Including:The input signal and default detection signal are modulated by step S100 signal input modules, are modulated into first Signal;First signal is carried out isolation processing by step S200 spacer mediums, and obtains secondary signal;Step S300 signals are defeated Go out module to be used to detect whether the secondary signal meets preset condition, when being unsatisfactory for, the secondary signal is modulated into full Working signal of the foot for the device of the connection of the signal output module output terminal.

Specifically, in the present embodiment, realize power-fail detection, and the design of signal recovery circuitry;Such as this When application is applied in a kind of signal isolator, the main function of isolator is the interference signal for removing isolator front end, is The load of rear end provides safe and reliable signal, and the signal of input is monitored in real time to realize, then inputs and believe in input terminal Number upper loading marking signal, for rear end according to marking signal judge the signal that exports by isolation whether normal operation;When catching When catching less than marking signal, then judge that signal output is abnormal, when abnormal by signal output module in the circuit built Realize input signal is consistent with output signal, isolator output end signal normal operation.

In the present invention, when the signal for detecting input terminal input occurs abnormal, the signal of adjustment output terminal output is expired The working signal of end connection device after foot, there is provided the stability and security of work system.

On the basis of above example, present invention also offers one embodiment;With reference to shown in figure 1,2,3,9;Step S110 clock circuits set the time cycle that detection signal triggering is preset described in first signal;Step S120 pulse generations The time cycle that device is set according to the clock circuit, the generation default detection letter corresponding with the clock cycle Number, the default detection signal is pulse signal;Step S130 logical operation circuits examine the input signal and the pulse Survey signal and carry out logical operation, synthesis is loaded with the signal to be detected of the default detection signal, is first signal.

One embodiment is provided in the present invention;With reference to shown in Fig. 1-3;Refering to what is shown in Fig. 5, isolator input terminal is defeated Enter after signal A is cached by trigger and export, clock circuit produces the square-wave signal in a fixed clock cycle, i.e. A1 ripples Shape signal;Impulse generator 120 produces the burst pulse of a setting according to the saltus step of the rising edge or trailing edge of A1 waveform signals Signal, namely A2 narrow pulse waveform signals, are also default detection signal;Mark using A2 as detection input signal, and add It is loaded in input signal to be detected, logical operation process is carried out by logical operation circuit 130;Input signal A to be detected is set to exist Burst pulse is produced in the time of setting, referring to the waveform of the middle A3 with reference to shown in figure 5;By A3 hair inputs into signal driver, warp Sent after crossing isolation processing to signal output module 300.

In the present invention, trigger can by input signal according to the threshold value Shape correction of setting into metastable electricity Ordinary mail number, by the clock circuit and impulse generator of setting, and the signal of input is adjusted to be loaded with by logical operation circuit The signal to be detected of mark is detected, realizes that the detection to input signal provides reliable basis for the signal output module of rear end.

On the basis of above example, present invention also offers one embodiment;The step S300 includes:Step S310 timing detection circuit detects the operating status of the secondary signal;Step S320 wave filters are according to the default detection signal Predeterminated frequency, filter out the default detection signal in the secondary signal;Step S330 numerical selectors are according to the meter When detection circuit detection the secondary signal operating status, perform corresponding operating mode, make its export signal meet after The working signal of the attachment device at end.

On the basis of above example, present invention also offers one embodiment;The step S330 includes:Step S331 when the timing detection circuit detected in setting time in the secondary signal there are it is described it is default detection signal when, The timing detection circuit keeps current output control signal, and it is the first work side to control the numerical selector to be in Formula, after the wave filter filters out the default detection signal in the secondary signal, and by described in the secondary signal Input signal exports after the selector, for the normal operation of the device of the connection of the signal output module output terminal.

On the basis of above example, present invention also offers one embodiment;Further include:Step S331 is when described Timing detection circuit detected in setting time in the secondary signal there is no it is described it is default detection signal when, the timing Detection circuit changes current output control signal, and it is the second working method to be in the numerical selector, controls the number Word selector input terminal receives default output signal, and further controls the signal output module output terminal to enter default work Make state;When the input signal of signal input module input is power supply signal, the signal output module is controlled Output terminal recovers power supply signal of the signal to be detected for normal work, work system is entered working status;Or control institute Signal output module output terminal output protection signal is stated, work system is entered guard mode;When the signal input module is defeated When the signal to be detected entered is data-signal, recover the signal output module output terminal output signal and signal input mould The input signal of block end input is consistent.

Specifically, in the present embodiment, with reference to shown in figure 4,5,6,11;Secondary signal is input signal A3 to be detected (figures 4) to signal receiver, final output signal B, as shown in fig. 6, signal output module 300 after the output of spacer medium 200 Processing is detected to its signal B, normal and abnormal situation is included in detection process process;Pass through timing detection circuit first 320 couples of its signal B are detected, due to, there are burst pulse, judging in signal B in the time clocking internal detection circuit 320 of setting It whether there is burst pulse in signal B, the generation of rising edge and trailing edge, the timing time of timing detection circuit 320 is big at this time In the A1 clock cycle;If it does, the signal of explanation output is normal, when signal to be detected is normal, signal B is consistent with A3, With reference to shown in figure 6 and Fig. 5;And be filtered signal B by wave filter 310, filter out the burst pulse in signal B, namely filter Except A2 signals;Filtered signal is changed into input signal A to be detected, and the signal that timing detection circuit 320 keeps current does not occur Signal, while by the output terminal of numerical selector 330, the signal B3 of output is consistent with input signal A to be detected, altogether rear end Normal work, shown in signal waveform Fig. 9 of output;The present embodiment compares suitable for the period of change of input signal A to be detected Longer, generally power supply signal is more, is constantly in the working status of same level.If when an exception occurs, with reference to 5 He of figure Shown in 7;Then to be detected by timing detection circuit 320 to its signal B, in the time clocking internal detection circuit 320 of setting Burst pulse is can't detect, is constantly in same level state, is judged as exception, the electricity of 320 output terminal of timing detection circuit at this time Level state is overturn, and controls the control terminal of numerical selector 330 to select different input end signals, at this time control numeral The selection acquiescence of selector 330 end, output and the level signal of normal input signal A to be detected, play the function of recovering level, or Person exports default value, ensures that back-end circuit is capable of the operating of normal reliable, be according to the connection circuit state of isolator rear end Controllable state.

Further include in the present embodiment, with reference to shown in figure 8;When letter A to be detected breaths are data-signal, under normal circumstances, The signal of input to spacer medium after signal input module is handled is the A3 waveforms in Fig. 8, from spacer medium output Signal is shown in Ba;Ba equivalent to B in Fig. 6, it is filtered etc. go out after export the waveform of B3.Also there are another feelings at the same time Condition, namely abnormal situation, the signal of input to spacer medium after signal input module is handled are the A3 ripples in Fig. 8 Shape, the signal from spacer medium output are shown in Bc;As can be seen from Figure 8, initial signal, namely rising edge have been lacked in Bc Or trailing edge is certain, in this application by being loaded with default detection signal, namely narrow pulse signal in signal to be detected (id signal), when initial signal after the loss, can be by the rising edge or trailing edge signal of default detection signal, by it Abnormal signal is recovered within the time of setting, it is reverted to signal consistent with input signal A, and the signal after recovery is The signal of very short time has been lacked, but ensure that follow-up output is normal condition.

In the present invention, module, spacer medium, and signal output module are input a signal into and is packaged in one, is packaged into Isolator device, realizes that input signal is consistent with output signal by the circuit built in signal output module, on the one hand real Power-fail detection is showed, and has effectively been recovered;On the other hand the detection of abnormal data signal is realized, makes its further The normal signal of input terminal input is reverted to, ensure that the normal operation of work system and the output of safety and stability.

It should be noted that the embodiment of the method in invention is applied in each embodiment of above-mentioned detection circuit, with It is corresponded.

It should be noted that above-described embodiment can be freely combined as needed.The above is only the preferred of the present invention Embodiment, it is noted that for those skilled in the art, do not departing from the premise of the principle of the invention Under, some improvements and modifications can also be made, these improvements and modifications also should be regarded as protection scope of the present invention.

Claims (14)

  1. A kind of 1. signal deteching circuit, it is characterised in that including:Signal input module, spacer medium, and signal output mould Block;
    Input signal and default detection signal are modulated by the signal input module, are modulated into the first signal;
    The spacer medium is connected with the signal input module, first signal is carried out isolation processing, and obtain second Signal;
    The signal output module is connected with the spacer medium, for detecting whether the secondary signal meets preset condition, When being unsatisfactory for, the secondary signal is modulated into and meets to believe for the work of the attachment device of the signal output module output terminal Number.
  2. 2. signal deteching circuit according to claim 1, it is characterised in that the signal input module includes:Clock electricity Road, impulse generator and logical operation circuit;
    The clock circuit is used to set the time cycle that detection signal triggering is preset described in first signal;
    The time cycle that the impulse generator is set according to the clock circuit, generation are corresponding with the clock cycle The default detection signal, the default detection signal is pulse signal;
    The input signal and the default detection signal are carried out logical operation by the logical operation circuit, and synthesis is loaded with described The signal to be detected of default detection signal, is first signal.
  3. 3. signal deteching circuit according to claim 1, it is characterised in that the signal output module includes:Wave filter, Timing detection circuit, numerical selector;
    The timing detection circuit is used for the operating status for detecting the secondary signal;
    The wave filter is used for the predeterminated frequency according to the default detection signal, filters out described default in the secondary signal Detect signal;
    The numerical selector is used for the operating status of the secondary signal detected according to the timing detection circuit, performs phase The operating mode answered, makes it export the working signal that signal meets the attachment device of rear end.
  4. 4. signal deteching circuit according to claim 3, it is characterised in that including:
    When the timing detection circuit detected in setting time in the secondary signal there are it is described it is default detection signal when, The timing detection circuit keeps current output control signal, and it is the first work side to control the numerical selector to be in Formula, after the wave filter filters out the default detection signal in the secondary signal, and by described in the secondary signal Input signal exports after the selector, for the normal operation of the device of the connection of the signal output module output terminal.
  5. 5. signal deteching circuit according to claim 3, it is characterised in that further include:
    The default detection signal is not present in the secondary signal when the timing detection circuit detects in setting time When, the timing detection circuit changes current output control signal, and it is the second working method to be in the numerical selector, Control the numerical selector input terminal to receive default output signal, and further control the signal output module output terminal into Enter default working status;
    When the input signal of signal input module input is power supply signal, the signal output module is controlled to export Power supply signal of the signal to be detected for normal work is recovered at end, work system is entered working status;Or the control letter Number output module output terminal output protection signal, makes work system enter guard mode;
    When the signal to be detected of signal input module input is data-signal, it is defeated to recover the signal output module Outlet output signal is consistent with the input signal that the signal input module end inputs.
  6. 6. signal deteching circuit according to claim 2, it is characterised in that further include:
    Trigger;The trigger is used to the input signal carrying out temporary processing, and sends to the clock circuit;
    The first input end of the output terminal of the trigger signal input part with the clock circuit, logical operation circuit respectively It is electrically connected;
    The output terminal of the clock circuit also passes through the second input terminal of the impulse generator and logical operation circuit electricity Connection.
  7. 7. signal deteching circuit according to claim 6, it is characterised in that further include:
    Signal driver, the signal input part of the driver and the logical operation circuit in the signal input module Output terminal is electrically connected, and the signal output part of the driver is electrically connected with the signal input part of spacer medium.
  8. 8. signal deteching circuit according to claim 3, it is characterised in that further include:
    Signal receiver, the input terminal of the signal receiver are electrically connected with the signal output part of the spacer medium;
    The output terminal of the signal receiver is electrically connected with the signal output module.
  9. 9. signal deteching circuit according to claim 3, it is characterised in that the signal output module includes:
    The input terminal of the wave filter is jointly electric with the output terminal of the signal receiver with the timing detection circuit input terminal Connection;
    The filter output is electrically connected with the input terminal of the numerical selector;
    The output terminal of the timing detection circuit is electrically connected with the numerical selector control terminal.
  10. A kind of 10. power detecting method, applied in any signal deteching circuits of claim 1-9, it is characterised in that Including:
    Input signal and default detection signal are modulated by step S100 signal input modules, are modulated into the first signal;
    First signal is carried out isolation processing by step S200 spacer mediums, and obtains secondary signal;
    Step S300 signal output modules are used to detect whether the secondary signal meets preset condition, when being unsatisfactory for, by institute State the working signal that secondary signal is modulated into the device for meeting the connection for the signal output module output terminal.
  11. 11. signal detecting method according to claim 10, it is characterised in that the step S100 includes:
    Step S110 clock circuits set the time cycle that detection signal triggering is preset described in first signal;
    The time cycle that step S120 impulse generators are set according to the clock circuit, generation and the clock cycle pair The default detection signal answered, the default detection signal is pulse signal;
    The input signal and the pulse detection signals are carried out logical operation by step S130 logical operation circuits, and synthesis is loaded with The signal to be detected of the default detection signal, is first signal.
  12. 12. signal detecting method according to claim 10, it is characterised in that the step S300 includes:
    Step S310 timing detection circuit detects the operating status of the secondary signal;
    Step S320 wave filters filter out described default in the secondary signal according to the predeterminated frequency of the default detection signal Detect signal;
    The operating status for the secondary signal that step S330 numerical selectors are detected according to the timing detection circuit, performs phase The operating mode answered, makes it export the working signal that signal meets the attachment device of rear end.
  13. 13. signal detecting method according to claim 12, it is characterised in that the step S330 includes:
    There are the default inspection when the timing detection circuit is detected in setting time in the secondary signal by step S331 When surveying signal, the timing detection circuit keeps current output control signal, and controls the numerical selector to be in for the One working method, after the wave filter filters out the default detection signal in the secondary signal, and by the secondary signal In the input signal exported after the selector, for the signal output module output terminal connection device just Often operation.
  14. 14. signal detecting method according to claim 12, it is characterised in that further include:
    There is no described default when the timing detection circuit is detected in setting time in the secondary signal by step S331 When detecting signal, the timing detection circuit changes current output control signal, and it is second to be in the numerical selector Working method, controls the numerical selector input terminal to receive default output signal, and further controls the signal output mould Block output terminal enters default working status;
    When the input signal of signal input module input is power supply signal, the signal output module is controlled to export Power supply signal of the signal to be detected for normal work is recovered at end, work system is entered working status;Or the control letter Number output module output terminal output protection signal, makes work system enter guard mode;
    When the signal to be detected of signal input module input is data-signal, recover the signal output module output terminal It is consistent with the input signal that the signal input module end inputs to export signal.
CN201711284421.1A 2017-12-07 2017-12-07 A kind of information detection and method CN108020792A (en)

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