CN104122882A - Fault diagnosis system of Balluff self-diagnostic type sensor - Google Patents
Fault diagnosis system of Balluff self-diagnostic type sensor Download PDFInfo
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- CN104122882A CN104122882A CN201310145702.4A CN201310145702A CN104122882A CN 104122882 A CN104122882 A CN 104122882A CN 201310145702 A CN201310145702 A CN 201310145702A CN 104122882 A CN104122882 A CN 104122882A
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Abstract
The invention discloses a fault diagnosis system of a Balluff self-diagnostic type sensor. A task execution period of a programmable controller is set to be less than 300us, and the number of task execution and the number of diagnostic pulses in a signal outputted by a sensor are counted. When the number of task execution is greater than a first set number, the diagnostic signal of the sensor is determined to be abnormal if the number of diagnostic pulses is greater than half of the number of possibly generated diagnostic pulses; and the diagnosis of the sensor is determined to fail if the diagnostic signal of the sensor is abnormal continuously for one or more times. According to the invention, by writing a reasonable software program for the programmable controller, the fault diagnosis system of the Balluff self-diagnostic type sensor completes signal processing for the Balluff self-diagnostic type sensor, can conduct the diagnosis fault for the Balluff self-diagnostic type sensor for one or more times, and is low in cost and convenient to install.
Description
Technical field
The present invention relates to sensing technology, particularly a kind of fault diagnosis system of Baruch husband self diagnosis type sensor.
Background technology
The sensor of BALLUFF (Baruch husband) with self diagnosis signal, is used in electric-control system in a large number.BALLUFF (Baruch husband) self diagnosis type sensor (as BES-113-356-SA31-S4, BES-113-356-SA6-S4, BES-113-356-SA6-PU, BES-113-3019-SA1-S4 or BES-113-3019-SA1-PU), the output signal of its first form is as shown in Figure 1: when approach switch is when detecting object and be less than or equal to setpoint distance (as 5mm), one+24V of output voltage, its diagnostic signal is the 0V voltage pulse signal of cycle 6.6ms, width 300us; When approach switch is apart from detecting object while being greater than setpoint distance (as 5mm), export a 0V voltage, its diagnostic signal be cycle 6.6ms, width 300us+24V voltage pulse signal.The output signal of its second form is as shown in Figure 2: when approach switch is when detecting object and be less than or equal to setpoint distance (as 5mm), export a 0V voltage, its diagnostic signal be cycle 6.6ms, width 300us+24V voltage pulse signal; In the time that approach switch is greater than setpoint distance (as 5mm) apart from detection object, one+24V of output voltage, its diagnostic signal is the 0V voltage pulse signal of cycle 6.6ms, width 300us.BALLUFF company provides dedicated processes module, diagnostic signal to the output of BALLUFF (Baruch husband) self diagnosis type sensor is processed, but each dedicated processes module can only be processed the diagnostic signal of a sensor, in the time of a large amount of use, need enough large installing space, and need to buy in addition.
Packaging unit in tobacco machine industrial automatic control field, be widely used the unit such as X1, X2, XC550, X6S of U.S. GD (Gardner-Denver) company, in its electric-control system, use a large amount of BALLUFF (Baruch husband) self diagnosis type sensor, to ensure the safe and reliable of control procedure.GD company adopts homemade clamp to process the diagnostic signal of BALLUFF (Baruch husband) self diagnosis type sensor output, and the homemade clamp of GD company is expensive.
Early stage Programmable Logic Controller is called programmable logic controller (PLC) (Programmable Logic Controller, PLC), and it is mainly used to replace relay to realize logic control.Along with the development of technology, the function of the industrial control device of this employing Microcomputer Technology has substantially exceeded the scope of logic control, and therefore, today, this device was called Programmable Logic Controller, is called for short PC.But for fear of obscuring with the abbreviation of personal computer (Personal Computer), so Programmable Logic Controller is called for short to PLC.
Common PLC can not detect the signal of 300us width, also with regard to having no idea, the diagnostic signal of BALLUFF (Baruch husband) self diagnosis type sensor output is processed.
Summary of the invention
The technical problem to be solved in the present invention is to provide the fault diagnosis system of a kind of BALLUFF (Baruch husband) self diagnosis type sensor, can carry out the fault diagnosis of BALLUFF (Baruch husband) self diagnosis type sensor, and cost is low, easy for installation.
For solving the problems of the technologies described above, the fault diagnosis system of Baruch husband self diagnosis type sensor provided by the invention, it comprises Programmable Logic Controller;
Described Programmable Logic Controller, receives the output signal of one or more Baruch husband self diagnosis type sensors;
Described Programmable Logic Controller, the tasks carrying cycle of setting is less than 300us, and its course of work is as follows:
One. the first counter of Programmable Logic Controller, the second counter, the 3rd counter O reset;
Two. Programmable Logic Controller is executed the task, and reads the output signal of a Baruch husband self diagnosis type sensor;
Three. Programmable Logic Controller uses the first counter to count the number of times of executing the task, and uses rising edge or the negative edge of the output signal of the second counter to this Baruch husband self diagnosis type sensor to count;
Four. if the count value of the first counter is more than or equal to the first set point number, carries out step 5, otherwise carries out step 3; C1*t >=n*6.6ms, C1 is the first set point number, the performance period that t is task, n is more than or equal to 4 positive integer;
Five. if the count value of the second counter is more than or equal to the second set point number, and
c2 is the second set point number, carries out step 6, otherwise carries out step 8;
Six. the first counter of Programmable Logic Controller, the second counter, the 3rd counter O reset;
Seven. Programmable Logic Controller is exported this Baruch husband self diagnosis type sensor diagnostic normal signal, carries out step 3;
Eight. the first counter of Programmable Logic Controller, the second counter O reset, the count value of the 3rd counter is from increasing 1;
If nine. the count value of the 3rd counter is more than or equal to the 3rd set point number, carries out step 10, otherwise carries out step 3;
Ten. Programmable Logic Controller is exported this Baruch husband diagnosis type sensor diagnostic fault-signal, finishes.
Preferably, the tasks carrying cycle of setting equals 200us, and the first set point number is that 3300, n is that 100, the second set point numbers are 70.
Preferably, the 3rd set point number is 5.
Preferably, fault diagnosis system also comprises digital quantity input module;
The output signal of Baruch husband self diagnosis type sensor is by described digital quantity input module access EtherCAT bus;
Described Programmable Logic Controller receives the output signal of Baruch husband self diagnosis type sensor by EtherCAT bus.
The fault diagnosis system of BALLUFF of the present invention (Baruch husband) self diagnosis type sensor, the tasks carrying cycle of setting Programmable Logic Controller is less than 300us, thereby the voltage pulse signal that the width that the diagnostic signal of BALLUFF (Baruch husband) self diagnosis type sensor can be detected is 300us, can process the diagnostic signal of BALLUFF (Baruch husband) self diagnosis type sensor output, and to tasks carrying time counting number, to the diagnosis step-by-step counting in the output signal of BALLUFF (Baruch husband) self diagnosis type sensor, when tasks carrying count value is more than or equal to the first set point number, be while reaching the cycle (6.6ms) of diagnostic signal of n (more than 4) BALLUFF self diagnosis type sensor the tasks carrying cumulative time, if diagnosis counted number of pulses is greater than a half of issuable diagnosis pulse, the diagnostic signal that judges BALLUFF self diagnosis type sensor is abnormal, if the continuous one or many of diagnostic signal of a BALLUFF self diagnosis type sensor is abnormal, judge this BALLUFF (Baruch husband) self diagnosis type sensor diagnostic fault.The fault diagnosis system of BALLUFF of the present invention (Baruch husband) self diagnosis type sensor, by Programmable Logic Controller being write to rational software program, complete the signal processing to BALLUFF (Baruch husband) self diagnosis type sensor, can carry out the fault diagnosis of one or more BALLUFF (Baruch husband) self diagnosis type sensor, replace existing hardware circuit board processing mode, reduce cost, simplified installation.
Brief description of the drawings
In order to be illustrated more clearly in technical scheme of the present invention, below the accompanying drawing that will use required for the present invention is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the output signal schematic diagram of the first form of BALLUFF self diagnosis type sensor;
Fig. 2 is the output signal schematic diagram of the second form of BALLUFF self diagnosis type sensor;
Fig. 3 is the Programmable Logic Controller course of work schematic diagram of fault diagnosis system one embodiment of Baruch husband self diagnosis type sensor of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the technical scheme in the present invention is carried out to clear, complete description, obviously, described embodiment is a part of embodiment of the present invention, instead of whole embodiment.Based on the embodiment in the present invention, all other embodiment that those of ordinary skill in the art obtain under the prerequisite of not making creative work, belong to the scope of protection of the invention.
Embodiment mono-
The fault diagnosis system of BALLUFF (Baruch husband) self diagnosis type sensor, comprises Programmable Logic Controller PLC;
Described Programmable Logic Controller PLC, receives the output signal of one or more BALLUFF (Baruch husband) self diagnosis type sensor;
Described Programmable Logic Controller, the tasks carrying cycle t of setting is less than 300us, and its course of work as shown in Figure 3, comprises the following steps:
One. the first counter of Programmable Logic Controller, the second counter, the 3rd counter O reset;
Two. Programmable Logic Controller is executed the task, and reads the output signal of a BALLUFF (Baruch husband) self diagnosis type sensor;
Three. Programmable Logic Controller uses the first counter to count the number of times of executing the task, and uses rising edge or the negative edge of the output signal of the second counter to this BALLUFF (Baruch husband) self diagnosis type sensor to count;
Four. if the count value of the first counter is more than or equal to the first set point number, carries out step 5, otherwise carries out step 3; C1*t >=n*6.6ms, C1 is the first set point number, the performance period that t is task, n is more than or equal to 4 integer;
Five. if the count value of the second counter is more than or equal to the second set point number, and
c2 is the second set point number, carries out step 6, otherwise carries out step 8;
Six. the first counter of Programmable Logic Controller, the second counter, the 3rd counter O reset;
Six. the first counter of Programmable Logic Controller, the second counter O reset, the count value of the 3rd counter is from increasing 1;
Seven. Programmable Logic Controller is exported this BALLUFF (Baruch husband) self diagnosis type sensor diagnostic normal signal, carries out step 3;
Eight. the first counter of Programmable Logic Controller, the second counter O reset, the count value of the 3rd counter is from increasing 1;
If nine. the count value of the 3rd counter is more than or equal to the 3rd set point number, carries out step 10, otherwise carries out step 3;
Ten. Programmable Logic Controller is exported this BALLUFF (Baruch husband) diagnosis type sensor diagnostic fault-signal, finishes.
The fault diagnosis system of BALLUFF (Baruch husband) the self diagnosis type sensor of embodiment mono-, the performance period of setting the task of Programmable Logic Controller is less than 300us, thereby the voltage pulse signal that the width that the diagnostic signal of BALLUFF (Baruch husband) self diagnosis type sensor can be detected is 300us, can process the diagnostic signal of BALLUFF (Baruch husband) self diagnosis type sensor output, and to tasks carrying time counting number, to the diagnosis step-by-step counting in the output signal of BALLUFF (Baruch husband) self diagnosis type sensor, when tasks carrying count value is more than or equal to the first set point number, be while reaching the cycle (6.6ms) of diagnostic signal of n (more than 4) BALLUFF self diagnosis type sensor the tasks carrying cumulative time, if diagnosis counted number of pulses is greater than a half of issuable diagnosis pulse, the diagnostic signal that judges BALLUFF self diagnosis type sensor is abnormal, if the continuous one or many of diagnostic signal of a BALLUFF self diagnosis type sensor is abnormal, judge this BALLUFF (Baruch husband) self diagnosis type sensor diagnostic fault.The fault diagnosis system of BALLUFF (Baruch husband) the self diagnosis type sensor of embodiment mono-, by Programmable Logic Controller being write to rational software program, complete the signal processing to BALLUFF (Baruch husband) self diagnosis type sensor, can carry out the fault diagnosis of one or more BALLUFF (Baruch husband) self diagnosis type sensor, replace existing hardware circuit board processing mode, reduce cost, simplified installation.
Embodiment bis-
Based on embodiment mono-, the tasks carrying cycle of setting equals 200us, and the first set point number is that 3300, n is that 100, the second set point numbers are that 70, the three set point numbers are 5.
The fault diagnosis system of BALLUFF (Baruch husband) the self diagnosis type sensor of embodiment bis-, when the count value of tasks carrying number of times equals 3300, be while reaching 660ms (being equivalent to the cycle of the diagnostic signal of 100 BALLUFF self diagnosis type sensors) the tasks carrying cumulative time, judge whether diagnosis counted number of pulses is more than or equal to 70% (70) of issuable diagnosis pulse, if be greater than etc. 70, judge that the diagnostic signal of BALLUFF self diagnosis type sensor is abnormal, if the diagnostic signal of a BALLUFF self diagnosis type sensor continuous 5 times abnormal, judge this BALLUFF (Baruch husband) self diagnosis type sensor diagnostic fault.
Embodiment tri-
Based on embodiment mono-, described Programmable Logic Controller PLC can be X20CP3486, X20CP3585, the X20CP3586 of CX1020, CX1030, CX2020, CX2030, CX2040 or Italian Bei Jialai (the B & R) company of times good fortune (BECKHOFF) company of Germany.
The Programmable Logic Controller CX1030 of BECKHOFF company of Germany, there is Intel Pentium M, the processor of 1.8GHz clock frequency, has installed Microsoft Windows CE operating system and TwinCAT PLC real-time kernel, and has configured the interfaces such as DVI, USB, RJ45.
When Programmable Logic Controller CX1030 carries out the programming of software program, can in the system of TwinCAT manager, be set the I/O scan period, the tasks carrying cycle (being less than 300us) is set in the PLC of TwinCAT control.
Embodiment tri-
Based on embodiment mono-, the fault diagnosis system of BALLUFF (Baruch husband) self diagnosis type sensor, also comprises digital quantity input module;
The output signal of BALLUFF (Baruch husband) self diagnosis type sensor is by described digital quantity input module access EtherCAT bus;
Described Programmable Logic Controller PLC receives the output signal of BALLUFF (Baruch husband) self diagnosis type sensor by EtherCAT bus.
Preferably, described digital quantity input module is X20DI2377, X20DI2371, the X20DI2372 of EL1114, EL1012, EL1202, EL1124, EL1014, EL1034, EL1094, EL1018, EL1098 or Italian Bei Jialai (the B & R) company of company of Germany times good fortune (BECKHOFF).
Digital quantity input module EL1114 is the digital quantity input module of four-way, and input filter is 10us, and EtherCAT bus and the Programmable Logic Controller PLC of through-rate 100M baud rate carry out data communication.
Preferably, the model of BALLUFF (Baruch husband) self diagnosis type sensor is BES-113-356-SA31-S4, BES-113-356-SA6-S4, BES-113-356-SA6-PU, BES-113-3019-SA1-S4 or BES-113-3019-SA1-PU.
BALLUFF (Baruch husband) self diagnosis type sensor BES-113-356-SA31-S4 is 24V direct current supply, three-wire type, PNP open type inductance type transducer.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any amendment of making, be equal to replacement, improvement etc., within all should being included in the scope of protection of the invention.
Claims (7)
1. a fault diagnosis system for Baruch husband self diagnosis type sensor, is characterized in that, comprises Programmable Logic Controller;
Described Programmable Logic Controller, receives the output signal of one or more Baruch husband self diagnosis type sensors;
Described Programmable Logic Controller, the tasks carrying cycle of setting is less than 300us, and its course of work is as follows:
One. the first counter of Programmable Logic Controller, the second counter, the 3rd counter O reset;
Two. Programmable Logic Controller is executed the task, and reads the output signal of a Baruch husband self diagnosis type sensor;
Three. Programmable Logic Controller uses the first counter to count the number of times of executing the task, and uses rising edge or the negative edge of the output signal of the second counter to this Baruch husband self diagnosis type sensor to count;
Four. if the count value of the first counter is more than or equal to the first set point number, carries out step 5, otherwise carries out step 3; C1*t >=n*6.6ms, C1 is the first set point number, the performance period that t is task, n is more than or equal to 4 integer;
Five. if the count value of the second counter is more than or equal to the second set point number, and
c2 is the second set point number, carries out step 6, otherwise carries out step 8;
Six. the first counter of Programmable Logic Controller, the second counter, the 3rd counter O reset;
Seven. Programmable Logic Controller is exported this Baruch husband self diagnosis type sensor diagnostic normal signal, carries out step 3;
Eight. the first counter of Programmable Logic Controller, the second counter O reset, the count value of the 3rd counter is from increasing 1;
If nine. the count value of the 3rd counter is more than or equal to the 3rd set point number, carries out step 10, otherwise carries out step 3;
Ten. Programmable Logic Controller is exported this Baruch husband diagnosis type sensor diagnostic fault-signal, finishes.
2. the fault diagnosis system of Baruch husband self diagnosis type sensor according to claim 1, is characterized in that,
The tasks carrying cycle of setting equals 200us, and the first set point number is that 3300, n is that 100, the second set point numbers are 70.
3. the fault diagnosis system of Baruch husband self diagnosis type sensor according to claim 1, is characterized in that,
The 3rd set point number is 5.
4. the fault diagnosis system of Baruch husband self diagnosis type sensor according to claim 1, is characterized in that,
Described Programmable Logic Controller is X20CP3486, X20CP3585, the X20CP3586 of CX1020, the CX1030 of German Bei Fu company, CX2020, CX2030, CX2040 or Italian Bei Jialai company.
5. the fault diagnosis system of Baruch husband self diagnosis type sensor according to claim 1, is characterized in that,
Fault diagnosis system also comprises digital quantity input module;
The output signal of Baruch husband self diagnosis type sensor is by described digital quantity input module access EtherCAT bus;
Described Programmable Logic Controller receives the output signal of Baruch husband self diagnosis type sensor by EtherCAT bus.
6. the fault diagnosis system of Baruch husband self diagnosis type sensor according to claim 5, is characterized in that,
Described digital quantity input module is X20DI2377, X20DI2371, the X20DI2372 of EL1114, the EL1012 of German Bei Fu company, EL1202, EL1124, EL1014, EL1034, EL1094, EL1018, EL1098 or Italian Bei Jialai company.
7. the fault diagnosis system of Baruch husband self diagnosis type sensor according to claim 1, is characterized in that,
The model of Baruch husband self diagnosis type sensor is BES-113-356-SA31-S4, BES-113-356-SA6-S4, BES-113-356-SA6-PU, BES-113-3019-SA1-S4 or BES-113-3019-SA1-PU.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109491368A (en) * | 2018-11-30 | 2019-03-19 | 邯郸市邯钢集团信达科技有限公司 | A method of PLC system input signal failure is diagnosed using counter |
| CN109981331A (en) * | 2017-12-28 | 2019-07-05 | 北京华为数字技术有限公司 | A kind of method for diagnosing faults and device |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10049685A1 (en) * | 2000-10-07 | 2002-04-11 | Volkswagen Ag | Process for single diagnosis of a nitrogen oxides sensor arranged in the exhaust gas line of an internal combustion engine comprises using a lambda signal characterizing the lambda value of the exhaust gas |
| JP3294159B2 (en) * | 1996-07-30 | 2002-06-24 | 株式会社日立製作所 | Sensor diagnostic device and sensor failure diagnostic method |
| CN1603151A (en) * | 2003-10-01 | 2005-04-06 | 现代自动车株式会社 | Method for diagnosing a noisy failure of a fuel level sensor in a vehicle |
| CN1731083A (en) * | 2005-08-26 | 2006-02-08 | 哈尔滨工业大学 | Position detector for double grating displacement transducer metering mode and detection method thereof |
| US20090099787A1 (en) * | 2006-05-08 | 2009-04-16 | Bayer Healthcare Llc | Abnormal Output Detection System For A Biosensor |
| CN101470048A (en) * | 2007-10-19 | 2009-07-01 | 通用汽车环球科技运作公司 | Intake air temperature sensor diagnostic |
| US20100076643A1 (en) * | 2008-09-24 | 2010-03-25 | Mando Corporation | Failure detecting method for steering angle sensor |
| CN101776916A (en) * | 2010-02-09 | 2010-07-14 | 浙江大学 | Sewage level sensor fault instant diagnosing, alarming and switching device |
| CN202025234U (en) * | 2011-04-12 | 2011-11-02 | 中国电子科技集团公司第四十一研究所 | Field bus module used in self-diagnosis sensor |
-
2013
- 2013-04-24 CN CN201310145702.4A patent/CN104122882A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3294159B2 (en) * | 1996-07-30 | 2002-06-24 | 株式会社日立製作所 | Sensor diagnostic device and sensor failure diagnostic method |
| DE10049685A1 (en) * | 2000-10-07 | 2002-04-11 | Volkswagen Ag | Process for single diagnosis of a nitrogen oxides sensor arranged in the exhaust gas line of an internal combustion engine comprises using a lambda signal characterizing the lambda value of the exhaust gas |
| CN1603151A (en) * | 2003-10-01 | 2005-04-06 | 现代自动车株式会社 | Method for diagnosing a noisy failure of a fuel level sensor in a vehicle |
| CN1731083A (en) * | 2005-08-26 | 2006-02-08 | 哈尔滨工业大学 | Position detector for double grating displacement transducer metering mode and detection method thereof |
| US20090099787A1 (en) * | 2006-05-08 | 2009-04-16 | Bayer Healthcare Llc | Abnormal Output Detection System For A Biosensor |
| CN101470048A (en) * | 2007-10-19 | 2009-07-01 | 通用汽车环球科技运作公司 | Intake air temperature sensor diagnostic |
| US20100076643A1 (en) * | 2008-09-24 | 2010-03-25 | Mando Corporation | Failure detecting method for steering angle sensor |
| CN101776916A (en) * | 2010-02-09 | 2010-07-14 | 浙江大学 | Sewage level sensor fault instant diagnosing, alarming and switching device |
| CN202025234U (en) * | 2011-04-12 | 2011-11-02 | 中国电子科技集团公司第四十一研究所 | Field bus module used in self-diagnosis sensor |
Non-Patent Citations (2)
| Title |
|---|
| 巴鲁夫学院: "电感式接近开关", 《百度文库》 * |
| 张梅 等: "基于USB总线的光栅位移传感器检测系统设计", 《仪表技术与传感器》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109981331A (en) * | 2017-12-28 | 2019-07-05 | 北京华为数字技术有限公司 | A kind of method for diagnosing faults and device |
| CN109491368A (en) * | 2018-11-30 | 2019-03-19 | 邯郸市邯钢集团信达科技有限公司 | A method of PLC system input signal failure is diagnosed using counter |
| CN109491368B (en) * | 2018-11-30 | 2021-09-24 | 邯郸市邯钢集团信达科技有限公司 | Method for diagnosing PLC system input signal fault by using counter |
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