CN104280189A - Pressure sensor fault hardware detection method and device - Google Patents
Pressure sensor fault hardware detection method and device Download PDFInfo
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Abstract
The invention relates to the technical field of medical monitoring, in particular to a pressure sensor fault hardware detection method and device. The pressure sensor fault hardware detection method mainly comprises the steps of utilizing a pressure sensor to acquire pressure signals, converting the pressure signals into differential signals, wherein the differential signals include an in-phase output signal and a reversed-phase output signal; preprocessing the in-phase output signal and reversed-phase output signal respectively; comparing level values of the in-phase output signal and reversed-phase output signal with a preset reference level range, and judging that a pressure sensor fault occurs and generating fault information if the level value of any one of the in-phase output signal and the reversed-phase output signal is within the preset reference level range; performing fault prompting according to the fault information. The pressure sensor fault hardware detection method and device detects whether the in-phase output signal and the reversed-phase output signal of the sensor are normal or not in real time so as to reflect whether the sensor is normal or not, further can reflect various faults of the sensor and accordingly improves system reliability.
Description
Technical field
the present invention relates to medical monitoring arts field, be specifically related to a kind of pressure sensor failure hardware detection method and pick-up unit thereof.
Background technology
in invasive blood pressure and non-invasive blood pressure are measured, usually adopt pressure transducer that pressure signal is converted to electric signal, the electric signal of conversion after signal processing circuit again entering signal collecting unit gather.
the electric signal that general pressure transducer exports is differential signal, i.e. In-phase output signal and reversed-phase output signal.The difference of the general output of pick-up transducers homophase and anti-phase output in pressure survey carrys out measured pressure value, when there is probe power shorted to earth or open circuit, sensor internal damages, output terminal to the fault such as power supply or ground short circuit time, because sensor differential signal is still in normal range, now sensor fault cannot be detected.
Summary of the invention
for overcoming above-mentioned defect, namely object of the present invention is to provide a kind of pressure sensor failure hardware detection method to put and pick-up unit.
the object of the invention is to be achieved through the following technical solutions:
the present invention is a kind of pressure sensor failure hardware detection method, comprising:
utilize a pressure transducer to gather pressure signal, and this pressure signal is converted to differential signal, described differential signal comprises: In-phase output signal and reversed-phase output signal;
homophase, reversed-phase output signal are carried out pre-service respectively;
level value through pretreated homophase, reversed-phase output signal is compared with the reference level scope preset respectively, if in homophase, reversed-phase output signal, the level value of any one output signal is not within the scope of the reference level preset, then be judged as pressure sensor failure, and generate failure message;
according to failure message, carry out fault cues.
further, described by the level value through pretreated homophase, reversed-phase output signal respectively with preset reference level scope compare, if in homophase, reversed-phase output signal, the level value of any one output signal is not within the scope of the reference level preset, then be judged as pressure sensor failure, generate failure message and comprise:
level value through pretreated In-phase output signal is compared with the first reference level preset, if be more than or equal to the first reference level at the level value of In-phase output signal, is then judged as pressure sensor failure, generate failure message; If the level value of In-phase output signal is not more than equal the first reference level, then the level value of In-phase output signal and the second reference level preset are compared, if the level value of In-phase output signal is less than or equal to the second reference level, be then judged as pressure sensor failure, generate failure message;
and, the level value through pretreated reversed-phase output signal is compared with the first reference level preset, if be more than or equal to the first reference level at the level value of reversed-phase output signal, is then judged as pressure sensor failure, generate failure message; If the level value of reversed-phase output signal is not more than equal the first reference level, then the level value of reversed-phase output signal and the second reference level preset are compared, if the level value of reversed-phase output signal is less than or equal to the second reference level, be then judged as pressure sensor failure, generate failure message.
further, described according to failure message, carry out fault cues and comprise: failure message is resolved, draw the content of failure message, and the content of this failure message is exported.
further, describedly homophase, reversed-phase output signal are carried out respectively pre-service and comprise:
respectively homophase, reversed-phase output signal are zoomed in or out or followed or filtering.
a kind of pressure sensor failure hardware detection of the present invention device, comprising:
pressure sensor unit, it is for gathering pressure signal, and this pressure signal is converted to differential signal, and described differential signal comprises: In-phase output signal and reversed-phase output signal;
pressure transducer output signal processing unit, described pressure transducer output signal processing unit is connected with described pressure sensor unit, for carrying out pre-service to the homophase received from this pressure sensor unit, reversed-phase output signal respectively;
reference level generator unit, described reference level generator unit is for generation of reference level scope;
comparator unit, described comparator unit outputs signal processing unit with reference level generator unit and pressure transducer respectively and is connected, reference level scope for being provided with this reference level generator unit respectively by the level value through pretreated homophase, reversed-phase output signal compares, if in homophase, reversed-phase output signal, the level value of any one output signal is not within the scope of this reference level, then be judged as pressure sensor failure, and generate failure message;
indicating fault unit, described indicating fault unit is connected with comparator unit, for according to failure message, carries out fault cues.
further, described reference level generator unit comprises: the first reference level value generator unit and the second reference level value generator unit;
described comparator unit comprises: the first comparing unit and the second comparing unit;
described first reference level value generator unit is for generation of the first reference level value;
described second reference level value generator unit is for generation of the second reference level value;
described first comparing unit connects with the first reference level value generator unit, for the level value of homophase, reversed-phase output signal is respectively compared with the first reference level value respectively, if the level value of arbitrary output signal is not more than equal the first reference level value, then call the second comparing unit, if be more than or equal to the first reference level value, then produce failure message;
described second comparing unit connects with the second reference level value generator unit, for the level value of homophase, reversed-phase output signal is compared with the second reference level value respectively, if the level value of arbitrary output signal is less than or equal to the second reference level value, then produce failure message.
improve as one, described pressure transducer output signal processing unit comprises: In-phase output signal processing unit, reversed-phase output signal processing unit and the first multi-channel switch module;
described In-phase output signal processing unit is used for carrying out pre-service to In-phase output signal;
described reversed-phase output signal processing unit is used for carrying out pre-service to reversed-phase output signal;
described first multi-channel switch module is connected with In-phase output signal processing unit, reversed-phase output signal processing unit and comparator unit respectively, for by receive through pretreated homophase, reversed-phase output signal time sharing transmissions in comparator unit.
improve as another kind, described pressure transducer output signal processing unit comprises: the second multi-channel switch module and output signal processing unit;
described second multi-channel switch module is connected with pressure sensor unit, for controlling In-phase output signal and reversed-phase output signal timesharing enters output signal processing unit;
output signal processing unit is connected with the second multi-channel switch module and comparator unit respectively, for carrying out pre-service to the In-phase output signal entered or reversed-phase output signal, and pretreated In-phase output signal or reversed-phase output signal are sent to comparator unit.
further, described indicating fault unit comprises: logic gate, and described logic gate is connected with comparator unit, for receiving and integrate failure message, and according to receiving the situation transmit operation signal of failure message.
further, described indicating fault unit also comprises: processor unit or valve control unit;
described processor unit is connected with logic gate, carries out reset operation for the operation signal control processor according to logic gate;
described valve control unit is connected with logic gate, for the folding condition of the operation signal by-pass valve control according to logic gate.
the present invention is due to difference pick-up transducers In-phase output signal and reversed-phase output signal, and respective handling is carried out to two output signals, whether all normally reflect that whether sensor is normal by real time detecting sensor homophase, anti-phase two output signals, and then the various fault of sensor can be reflected, thus improve system reliability.
Accompanying drawing explanation
for ease of illustrating, the present invention is described in detail by following preferred embodiment and accompanying drawing.
fig. 1 is the process flow diagram of a pressure sensor failure hardware detection method of the present invention embodiment;
fig. 2 is the process flow diagram of another embodiment of pressure sensor failure hardware detection method of the present invention;
fig. 3 is pressure sensor failure hardware detection device building-block of logic of the present invention;
fig. 4 is pressure sensor failure hardware detection device of the present invention embodiment building-block of logic;
fig. 5 is another embodiment building-block of logic of pressure sensor failure hardware detection device of the present invention.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is described in more detail.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Refer to Fig. 1, the present invention is a kind of pressure sensor failure hardware detection method, comprising:
1. pressure signal is converted to differential signal;
Utilize pressure transducer to gather pressure signal, and this pressure signal is converted to differential signal, described differential signal comprises: two not identical output signals, and it is respectively: In-phase output signal and reversed-phase output signal;
2. pair In-phase output signal and reversed-phase output signal signal carry out pre-service
Homophase, reversed-phase output signal are carried out pre-service respectively;
3. two output signals after process compare with reference level;
level value through pretreated homophase, reversed-phase output signal is compared with the reference level scope preset respectively, if in homophase, reversed-phase output signal, the level value of any one output signal is not within the scope of the reference level preset, then be judged as pressure sensor failure, generate failure message; Be specially In-phase output signal to compare with the first reference level, the second reference level respectively and compare with the first reference level, the second reference level respectively with In-phase output signal;
4. export the information of reflection sensor fault;
according to failure message, carry out fault cues.
refer to Fig. 2, the present invention is a kind of pressure sensor failure hardware detection method, comprising:
10. pressure signal is converted to differential signal;
utilize pressure transducer to gather pressure signal, and this pressure signal is converted to differential signal, described differential signal comprises: two not identical output signals, it is respectively: In-phase output signal and reversed-phase output signal.
11. pairs of In-phase output signal and reversed-phase output signal carry out pre-service;
export after homophase, reversed-phase output signal are zoomed in or out respectively or follow or filtering etc. processes.
two output signals after 12. process compare with reference level;
two output signals after process are compared with the reference level of setting respectively.
because sensor output is two output signals, these two output signals compare with reference level respectively, are specially: In-phase output signal is not compared with the first reference level, the second reference level and compared with the first reference level, the second reference level respectively by reversed-phase output signal.
13. are more than or equal to the first reference level;
judge whether the sensor In-phase output signal after processing is more than or equal to setting first reference level.If the sensor In-phase output signal after process is more than or equal to setting first reference level, then show that sensor exists fault, output transducer failure message.If the sensor In-phase output signal after process is less than setting first reference level, then continue to judge whether the sensor In-phase output signal after processing is less than or equal to the second reference level;
and, judge whether the sensor reversed-phase output signal after processing is more than or equal to setting first reference level.If the sensor reversed-phase output signal after process is more than or equal to setting first reference level, then show that sensor exists fault, output transducer failure message.If the sensor reversed-phase output signal after process is less than setting first reference level, then continue to judge whether the sensor reversed-phase output signal after processing is less than or equal to the second reference level.
14. are less than or equal to the second reference level;
judge whether the sensor In-phase output signal after processing is less than or equal to setting second reference level.If the sensor In-phase output signal after process is less than or equal to setting second reference level, then show that sensor exists fault, output transducer failure message.If the sensor In-phase output signal after process is greater than setting second reference level, then continue to judge that whether the sensor reversed-phase output signal after processing is normal.
and, judge whether the sensor reversed-phase output signal after processing is less than or equal to setting second reference level.If the sensor reversed-phase output signal after process is less than or equal to setting second reference level, then show that sensor exists fault, output transducer failure message.If the sensor reversed-phase output signal after process is greater than setting second reference level, then whether the sensor In-phase output signal continued after cycle criterion process is normal.
15. export the information reflecting sensor fault;
when detecting that the arbitrary single-ended signal of sensor is more than or equal to the first reference level or is less than or equal to the second reference level or two single-ended signals are all more than or equal to the first reference level or are less than or equal to the second reference level, then show that sensor exists fault, output transducer failure message, as output system reset signal, power-up reset signal, processor reset signals, closedown air pump signal, opens the information such as valve signal.When detecting that sensor two single-ended signals are all less than the first reference level and are greater than the second reference level, then illustrate that sensor is normal; Failure message is resolved, draws the content of failure message, and the content of this failure message is exported.
refer to Fig. 3, a kind of pressure sensor failure hardware detection of the present invention device, comprising:
pressure sensor unit 20, it is for gathering pressure signal, and this pressure signal is converted to differential signal, and described differential signal comprises: two not identical output signals, and it is respectively: In-phase output signal and reversed-phase output signal;
pressure transducer output signal processing unit 21, described pressure transducer output signal processing unit 21 is connected with described pressure sensor unit 20, for zooming in or out the homophase received from this pressure sensor unit 20, reversed-phase output signal or follow respectively or output after the process such as filtering;
reference level generator unit 22, described reference level generator unit 22 for generation of and output reference level, reference level is used for defining the whether normal threshold value of sensor two Single-end output signals, this threshold value sets according to the actual requirements, and the number of reference level generator is determined according to actual conditions.
comparator unit 23, described comparator unit 23 outputs signal processing unit 21 with reference level generator unit 22 and pressure transducer respectively and is connected, reference level scope for being provided with this reference level generator unit 22 respectively by the level value through pretreated homophase, reversed-phase output signal compares, if in homophase, reversed-phase output signal, the level value of any one output signal is not within the scope of this reference level, then be judged as pressure sensor failure, generate failure message; Such as, when sensor first or reversed-phase output signal are more than or equal to the first reference level or are less than or equal to the second reference level, comparator unit 23 exports the first level, represent that sensor single-ended signal is abnormal, i.e. sensor fault, when the single-ended actual signal of sensor is less than the first reference level and is greater than the second reference level, comparator unit 23 exports second electrical level, represent that sensor single-ended signal is normal, namely sensor is normal.The number of comparer is determined according to actual conditions.
indicating fault unit 24, described indicating fault unit 24 is connected with comparator unit 23, for according to failure message, carries out fault cues.
further, described reference level generator unit 22 comprises: the first reference level value generator unit 220 and the second reference level value generator unit;
described comparator unit 23 comprises: the first comparing unit 230 and the second comparing unit 231;
described first reference level value generator unit 220 is for generation of the first reference level value;
described second reference level value generator unit 221 is for generation of the second reference level value;
described first comparing unit 230 connects with the first reference level value generator unit 220, for the level value of homophase, reversed-phase output signal is respectively compared with the first reference level value respectively, if the level value of arbitrary output signal is not more than equal the first reference level value, then call the second comparing unit 231, if be more than or equal to the first reference level value, then produce failure message;
described second comparing unit 231 connects with the second reference level value generator unit 221, for the level value of homophase, reversed-phase output signal is compared with the second reference level value respectively, if the level value of arbitrary output signal is less than or equal to the second reference level value, then produce failure message.
be described with the specific works process of an embodiment to the first comparing unit 230 and the second comparing unit 231 below, it is specially:
first In-phase output signal accesses the first comparing unit 230 and the second comparing unit 231 by pressure transducer output signal processing unit 21, compares respectively with the first reference level and the second reference level:
first comparing unit 230 is with the first described reference level value generator unit 220, pressure transducer outputs signal processing unit 21, logic gate 240 is connected.Sensor In-phase output signal after process is accessed the first comparing unit 230 by pressure transducer output signal processing unit 21, sensor In-phase output signal after process and the first reference level are compared, convert its output level according to comparative result, thus whether tell sensor according to this output level abnormal.Such as, when single-ended 1 actual signal of sensor is more than or equal to the first reference level, the first comparing unit 230 exports the first level, represents that sensor In-phase output signal is abnormal, i.e. sensor fault.When single-ended 1 actual signal of sensor is less than the first reference level, the first comparing unit 230 exports second electrical level, now cannot judge that whether sensor In-phase output signal is normal, needs to continue to compare with the second reference level.
second comparing unit 231 is with the second described reference level value generator unit 221, pressure transducer outputs signal processing unit 21, logic gate 240 is connected.Sensor In-phase output signal after process is accessed the second comparing unit 231 by pressure transducer output signal processing unit 21, sensor In-phase output signal after process and the second reference level are compared, convert its output level according to comparative result, thus whether tell sensor according to this output level abnormal.Such as, when single-ended 1 actual signal of sensor is less than or equal to the second reference level, the second comparing unit 231 exports the first level, represents that sensor In-phase output signal is abnormal, i.e. sensor fault.When single-ended 1 actual signal of sensor is greater than the second reference level, second comparing unit 231 exports second electrical level, again in conjunction with the Output rusults of the first comparing unit 230, if when single-ended 1 actual signal of sensor is less than the first reference level and is greater than the second reference level, represent that sensor In-phase output signal is normal.Because sensor has two Single-end output signals, so time still cannot judge that sensor is whether normal, need to continue to judge that whether sensor reversed-phase output signal normal.
secondly reversed-phase output signal accesses the first comparing unit 230 and the second comparing unit 231 by pressure transducer output signal processing unit 21, compares respectively with the first reference level and the second reference level:
first comparing unit 230 is with the first described reference level value generator unit 220, pressure transducer outputs signal processing unit 21, logic gate 240 is connected.Sensor reversed-phase output signal after process is accessed the first comparing unit 230 by pressure transducer output signal processing unit 21, sensor reversed-phase output signal after process and the first reference level are compared, convert its output level according to comparative result, thus whether tell sensor according to this output level abnormal.Such as, when single-ended 2 actual signals of sensor are more than or equal to the first reference level, the first comparing unit 230 exports the first level, represents that sensor reversed-phase output signal is abnormal, i.e. sensor fault.When single-ended 2 actual signals of sensor are less than the first reference level, the first comparing unit 230 exports second electrical level, now cannot judge that whether sensor reversed-phase output signal is normal, needs to continue to compare with the second reference level.
second comparing unit 231 is with the second described reference level value generator unit 221, pressure transducer outputs signal processing unit 21, logic gate 240 is connected.Sensor reversed-phase output signal after process is accessed the second comparing unit 231 by pressure transducer output signal processing unit 21, sensor reversed-phase output signal after process and the second reference level are compared, convert its output level according to comparative result, thus whether tell sensor according to this output level abnormal.Such as, when single-ended 2 actual signals of sensor are less than or equal to the second reference level, the second comparing unit 231 exports the first level, represents that sensor reversed-phase output signal is abnormal, i.e. sensor fault.When single-ended 2 actual signals of sensor are greater than the second reference level, second comparing unit 231 exports second electrical level, again in conjunction with the Output rusults of the first comparing unit 230, if when single-ended 2 actual signals of sensor are less than the first reference level and are greater than the second reference level, represent that sensor reversed-phase output signal is normal.
the judged result of combined sensor In-phase output signal and sensor reversed-phase output signal; if sensor two single-ended signals are all normal; then show that sensor is normal, if arbitrary sensor single-ended signal is abnormal or two single-ended signals are all abnormal, then show sensor abnormality.
please refer to Fig. 4, with an embodiment, present invention is described below, and it is specially:
described pressure transducer output signal processing unit 21 comprises: In-phase output signal processing unit 210, reversed-phase output signal processing unit 211 and the first multi-channel switch module 212;
described In-phase output signal processing unit 210 is for carrying out pre-service to In-phase output signal, and it zooms in or out the In-phase output signal (OUT+) in pressure transducer or follow or exports after the process such as filtering;
described reversed-phase output signal processing unit 211 is for carrying out pre-service to reversed-phase output signal, and it zooms in or out the reversed-phase output signal (OUT-) in pressure transducer or follow or exports after the process such as filtering;
described first multi-channel switch module 212 is connected with In-phase output signal processing unit 210, reversed-phase output signal processing unit 211 and comparator unit 23 respectively, for by receive through pretreated homophase, reversed-phase output signal time sharing transmissions in comparator unit 23, such as, first the In-phase output signal after process is accessed the first comparing unit 230 and the second comparing unit 231, In-phase output signal is compared with the first reference level and the second reference level respectively; Secondly, then the reversed-phase output signal after process is accessed the first comparing unit 230 and the second comparing unit 231, In-phase output signal is compared with the first reference level and the second reference level respectively.
described indicating fault unit 24 comprises: logic gate 240 and processor unit 241, and described logic gate 240 is connected with comparator unit 23, for receiving and integrate failure message, and according to receiving the situation transmit operation signal of failure message; Its operation signal can be the information such as systematic reset signal, power-up reset signal, watchdog reset signal, processor reset signals, closedown air pump signal, valve control signal.Its two of specifically the first comparing unit 230 and the second comparing unit 231 being exported judge whether abnormal result merges into an output to sensor, when detecting that the arbitrary output signal of sensor is abnormal or two output signals are all abnormal, logic gate 240 exports reset signal to processor unit 241, if exception does not appear in sensor, then logic gate 240 exports non-reset signal to processor unit 241;
described processor unit 241 is connected with logic gate 240, for carrying out reset operation according to the processor reset signals control processor in the operation signal of logic gate 240; When detecting that the arbitrary output signal of sensor is abnormal or two output signals are all abnormal, logic gate 240 exports reset signal to processor unit 241, makes processor reset, normally cannot work, thus show sensor experiences failure.If detect, sensor two Single-end output signals are all not abnormal, and logic gate 240 exports non-reset signal to processor unit 241, and processor normally works, thus shows that sensor does not break down.
please refer to Fig. 5, with another embodiment, present invention is described below, and it is specially:
described pressure transducer output signal processing unit 21 comprises: the second multi-channel switch module 213 and output signal processing unit 214;
described second multi-channel switch module 213 is connected with pressure sensor unit 20, enters output signal processing unit 214 for controlling In-phase output signal and reversed-phase output signal timesharing; Such as, first by In-phase output signal access output signal processing unit 214, first respective handling is carried out to In-phase output signal; Secondly, then reversed-phase output signal access is outputed signal processing unit 214, then respective handling is carried out to reversed-phase output signal.
output signal processing unit 214 is connected with the second multi-channel switch module 213 and comparator unit 23 respectively, for carrying out pre-service to the In-phase output signal entered or reversed-phase output signal, and pretreated In-phase output signal or reversed-phase output signal are sent to comparator unit 23.
described indicating fault unit 24 comprises: logic gate 240 and valve control unit 242, and described logic gate 240 is connected with comparator unit 23, for receiving and integrate failure message, and according to receiving the situation transmit operation signal of failure message; Its operation signal can be the information such as systematic reset signal, power-up reset signal, watchdog reset signal, processor reset signals, closedown air pump signal, valve control signal; When detecting that the arbitrary output signal of sensor is abnormal or two output signals are all abnormal, logic gate 242 output opens the control signal of valve to valve control unit 242, thus realizes the unlatching of valve.If detect, sensor output signal is normal, then logic gate 240 exports the control signal of valve-off to valve control unit 242, thus realizes the closedown of valve.
described valve control unit 242 is connected with logic gate 240; for the folding condition according to the valve control signal by-pass valve control in the operation signal of logic gate; when detecting that the arbitrary output signal of sensor is abnormal or two output signals are all abnormal; logic gate 240 output opens the control signal of valve to valve control unit 242; valve is made to be in open mode; system normally cannot realize the measurement function of non-invasive blood pressure, thus shows sensor fault.If detect, sensor output signal is normal, then logic gate 240 exports the control signal of valve-off to valve control unit 242, and make valve be in closed condition, system normally can measure non-invasive blood pressure, thus shows that sensor does not break down.
certainly, the present invention also can be applied in invasive blood pressure measuring process, the present invention can by the various faults of indicating fault unit monitoring sensor, it also solves if sensor output is to power supply or ground short circuit, during the faults such as sensor internal damage, system cannot detect the problem of this type of fault, thus improves system reliability.
the foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a pressure sensor failure hardware detection method, is characterized in that, comprising:
Utilize pressure transducer to gather pressure signal, and this pressure signal is converted to differential signal, described differential signal comprises: In-phase output signal and reversed-phase output signal;
Homophase, reversed-phase output signal are carried out pre-service respectively;
Level value through pretreated homophase, reversed-phase output signal is compared with the reference level scope preset respectively, if in homophase, reversed-phase output signal, the level value of any one output signal is not within the scope of the reference level preset, then be judged as pressure sensor failure, and generate failure message;
According to failure message, carry out fault cues.
2. pressure sensor failure hardware detection method according to claim 1, it is characterized in that, described by the level value through pretreated homophase, reversed-phase output signal respectively with preset reference level scope compare, if in homophase, reversed-phase output signal, the level value of any one output signal is not within the scope of the reference level preset, then be judged as pressure sensor failure, and generate failure message and comprise:
Level value through pretreated In-phase output signal is compared with the first reference level preset, if be more than or equal to the first reference level at the level value of In-phase output signal, is then judged as pressure sensor failure, generate failure message; If the level value of In-phase output signal is not more than equal the first reference level, then the level value of In-phase output signal and the second reference level preset are compared, if the level value of In-phase output signal is less than or equal to the second reference level, be then judged as pressure sensor failure, generate failure message;
And, the level value through pretreated reversed-phase output signal is compared with the first reference level preset, if be more than or equal to the first reference level at the level value of reversed-phase output signal, is then judged as pressure sensor failure, generate failure message; If the level value of reversed-phase output signal is not more than equal the first reference level, then the level value of reversed-phase output signal and the second reference level preset are compared, if the level value of reversed-phase output signal is less than or equal to the second reference level, be then judged as pressure sensor failure, generate failure message.
3. pressure sensor failure hardware detection method according to claim 2, is characterized in that, described according to failure message, carries out fault cues and comprises:
Failure message is resolved, draws the content of failure message, and the content of this failure message is exported.
4. pressure sensor failure hardware detection method according to claim 3, is characterized in that, describedly homophase, reversed-phase output signal is carried out respectively pre-service and comprises:
Respectively homophase, reversed-phase output signal are zoomed in or out or followed or filtering.
5. a pressure sensor failure hardware detection device, is characterized in that, comprising:
Pressure sensor unit, it is for gathering pressure signal, and this pressure signal is converted to differential signal, and described differential signal comprises: In-phase output signal and reversed-phase output signal;
Pressure transducer output signal processing unit, described pressure transducer output signal processing unit is connected with described pressure sensor unit, for carrying out pre-service to the homophase received from this pressure sensor unit, reversed-phase output signal respectively;
Reference level generator unit, described reference level generator unit is for generation of reference level scope;
Comparator unit, described comparator unit outputs signal processing unit with reference level generator unit and pressure transducer respectively and is connected, reference level scope for being provided with this reference level generator unit respectively by the level value through pretreated homophase, reversed-phase output signal compares, if in homophase, reversed-phase output signal, the level value of any one output signal is not within the scope of this reference level, then be judged as pressure sensor failure, and generate failure message;
Indicating fault unit, described indicating fault unit is connected with comparator unit, for according to failure message, carries out fault cues.
6. pressure sensor failure hardware detection device according to claim 5, is characterized in that, described reference level generator unit comprises: the first reference level value generator unit and the second reference level value generator unit;
Described comparator unit comprises: the first comparing unit and the second comparing unit;
Described first reference level value generator unit is for generation of the first reference level value;
Described second reference level value generator unit is for generation of the second reference level value;
Described first comparing unit connects with the first reference level value generator unit, for respectively the level value of homophase, reversed-phase output signal being compared with the first reference level value respectively, if the level value of arbitrary output signal is not more than equal the first reference level value, then call the second comparing unit, if be more than or equal to the first reference level value, then produce failure message;
Described second comparing unit connects with the second reference level value generator unit, for the level value of homophase, reversed-phase output signal is compared with the second reference level value respectively, if the level value of arbitrary output signal is less than or equal to the second reference level value, then produce failure message.
7. pressure sensor failure hardware detection device according to claim 6, is characterized in that, described pressure transducer output signal processing unit comprises: In-phase output signal processing unit, reversed-phase output signal processing unit and the first multi-channel switch module;
Described In-phase output signal processing unit is used for carrying out pre-service to In-phase output signal;
Described reversed-phase output signal processing unit is used for carrying out pre-service to reversed-phase output signal;
Described first multi-channel switch module is connected with In-phase output signal processing unit, reversed-phase output signal processing unit and comparator unit respectively, for by receive through pretreated homophase, reversed-phase output signal time sharing transmissions in comparator unit.
8. pressure sensor failure hardware detection device according to claim 6, is characterized in that, described pressure transducer output signal processing unit comprises: the second multi-channel switch module and output signal processing unit;
Described second multi-channel switch module is connected with pressure sensor unit, for controlling In-phase output signal and reversed-phase output signal timesharing enters output signal processing unit;
Output signal processing unit is connected with the second multi-channel switch module and comparator unit respectively, for carrying out pre-service to the In-phase output signal entered or reversed-phase output signal, and pretreated In-phase output signal or reversed-phase output signal are sent to comparator unit.
9. the pressure sensor failure hardware detection device according to claim 7 or 8, it is characterized in that, described indicating fault unit comprises: logic gate, described logic gate is connected with comparator unit, for receiving and integrate failure message, and according to receiving the situation transmit operation signal of failure message.
10. pressure sensor failure hardware detection device according to claim 9, is characterized in that, described indicating fault unit also comprises: processor unit or valve control unit;
Described processor unit is connected with logic gate, carries out reset operation for the operation signal control processor according to logic gate;
Described valve control unit is connected with logic gate, for the folding condition of the operation signal by-pass valve control according to logic gate.
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