CN209690776U - A kind of electrical soft fault diagnosis device of digital quantity - Google Patents
A kind of electrical soft fault diagnosis device of digital quantity Download PDFInfo
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- CN209690776U CN209690776U CN201920504868.3U CN201920504868U CN209690776U CN 209690776 U CN209690776 U CN 209690776U CN 201920504868 U CN201920504868 U CN 201920504868U CN 209690776 U CN209690776 U CN 209690776U
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Abstract
The utility model discloses a kind of electrical soft fault diagnosis devices of digital quantity, including DC24V power module, PLC, touch screen, digital signal detection circuit, the DC24V power module connects touch screen power end, the communication serial ports of PLC connects with touch screen communication serial ports, the input terminal of the PLC connects with digital signal detection circuit output end, the utility model provides a kind of electrical soft fault diagnosis device of digital quantity, it can be achieved flexible in application simple, practical to the quick capture of aperiodicity open circuit fault and identification, the present apparatus.
Description
Technical field
The utility model belongs to electric fault detection technique field, and in particular to a kind of electrical soft fault diagnosis dress of digital quantity
It sets.
Background technique
With the fast development of modern science and technology, industrial control system gradually moves towards automation, intelligent, enlargement；
New technology, new equipment, continues to bring out new process, it is desirable that and worker at the production line is continuously updated scientific knowledge and improves technical level, with
Adapt to the needs of socio-economic development.
PLC centralized control is widely applied in actual production, and electrical control scene is essentially by host computer complete monitoring, In
Apparently live all fault-signals can monitor in real time people, existing as long as scene has any failure host computer that can show
As long as maintenance electrician goes replacement component to debug according to fault message, at all without more high technology contents；Its
It is real not so although most of fault message is able to achieve complete monitoring, to be substantially a little comprehensive fault messages, it can only be to one
Line maintenance electrician one reference in handling failure, field control cabinet give host computer to transmit a comprehensive fault message
When, many electrical components auxiliary contact poor contacts in cabinet, terminal row wiring loosen, field control cable aging broken skin or long-term
Vibration friction etc., is likely to be such failure " arch-criminal ", and fault message always exists not bad processing, can be former according to control
Reason gradually search by reasoning, the most troublesome to be exactly: shutting down suddenly in equipment operation and host computer shows that " so-and-so " unit trip is believed
Breath, it is again automatic after shutdown to restore normal, restart rear normal operation irregularly and above-mentioned phenomenon occurs；When there are also being exactly equipment operation
Occurs protection control route miniature circuit breaker tripping suddenly, in-site measurement is again without breaking phenomena, and trial line charging closes a floodgate normally again, equipment
It reruns and irregularly phenomenon of the failure repeats, here it is the electrical soft faults of maintenance electrician's headache the most；Ground production system
Each test run start and stop completely at least need 40-50 minutes when there is such failure, and failure may be come if it cannot thoroughly exclude
It returns test run to result in one or several classes several times and cannot normally produce, both brings very big fiber crops to normal organization of production in this way
It is tired, but because test run back and forth to large scale equipment caused by impact injury.
For the aperiodicity of industrial control system (cuts in and out) electric signal failure, so far without effective side
Method is monitored, locks, and is still the difficult point in electric control system troubleshooting；Electrically believe for excluding aperiodicity at present
Number failure also relies primarily on empirical method, can not achieve everybody and promotes, it is low to exist simultaneously overhaul efficiency；Investigation method is main one by one
Disadvantage is exactly that maintenance workload is big, and overhaul efficiency is low, has not only delayed production but also has increased to equipment and has damaged；It can not achieve quick diagnosis
The purpose of failure.
According to electric signal transmission form, electric signal failure can be divided into digital quantity signal failure and analog signals event
Hinder two major classes；For digital quantity signal failure, " digital quantity signal is the irregular open circuit event of on-off model to the application
Barrier "；The applicant is concentrated on studies for many years, in conjunction with more than ten years practical work experience, is devised for the such electrical soft event of lookup
The efficient apparatus of barrier is, it can be achieved that capturing and identifying to the quick of aperiodicity open circuit fault.
Summary of the invention
The purpose of this utility model is to provide a kind of electrical soft fault diagnosis devices of digital quantity, it can be achieved that aperiodicity
The quick capture of open circuit fault and identification, the present apparatus are flexible in application simple, practical.
The technical solution adopted in the utility model is as follows: a kind of electrical soft fault diagnosis device of digital quantity, including DC24V electricity
Source module, PLC, touch screen, digital signal detection circuit, the DC24V power module input terminal are separately connected live AC220V
N line and L line, V- and DC24V the power module outlet 24V- of the touch screen power end are connect on alternating current, the electricity of touch screen
Source V+ is connect with DC24V power module outlet 24V+, and the touch screen communication serial ports passes through the communication of communication cable and PLC
Serial ports connects；The input terminal of the PLC connects with digital signal detection circuit output end, the upper PE terminal ground of PLC, the upper M- of PLC
Terminal connects 1M terminal；
The digital signal detection circuit include disconnecting relay K1-Kn, adjustable resistance R1-Rn, digital fault input connect
One end of mouth Q1-Qn, COM digital fault input interface, the disconnecting relay Kn auxiliary normally opened contact is digital signal detection
Circuit output end connects with PLC input terminal, and the disconnecting relay Kn auxiliary normally opened contact other end, which is cascaded, accesses L on PLC
+ terminal, disconnecting relay Kn wire loop terminal A1 access adjustable resistance Rn one end, the adjustable resistance Rn for inhibit to
Induced voltage caused by slowdown monitoring circuit adjusts the sensitive degree of disconnecting relay Kn, the adjustable resistance other end and number event
Hinder input interface Qn to be connected, the digital fault input interface Qn is for connecting extraneous circuit under test, disconnecting relay Kn coil
Loop terminals A2 accesses COM digital fault input interface, and the anode of extraneous circuit under test accesses digital fault input interface Qn,
The cathode of extraneous circuit under test accesses COM digital fault input interface, and the present apparatus can be monitored circuit under test, PLC
It receives signal and fault point locking, record is carried out by program；
The touch screen is used to search detected fault message, carries out precise positioning to the fault point of appearance and carries out
Maintenance work.
Further, the digital signal detection circuit is equipped with 8, respectively circuit 1, circuit 2, circuit 3, circuit 4, circuit
5, circuit 6, circuit 7, circuit 8(, that is, n=8), the circuit 1 is successively arranged disconnecting relay K1, adjustable resistance R1, digital fault
Input interface Q1, remaining circuit 2-8 is identical with 1 connection type of circuit, disconnecting relay K1-Kn wire loop terminal A2
It is connected in series together, accesses COM digital fault input interface.
Further, the PLC selects siemens PLC PLC, and the touch screen selects the Kunlun on-state touch screen, is isolated
Relay selects Schneider RXM2LB2BD, and the DC24V power module selects the western SA5024 of moral power, and the adjustable resistance is selected
Risym P-503 precision adjustable resistance.
The application method of the present apparatus, includes the following steps:
(1) when detecting failure, according to the different voltages grade of signal, the disconnecting relay of relevant voltage grade, example are selected
When such as examining 24V or so circuit, the disconnecting relay that voltage class is 24V is needed to change, PLC input terminal can be by PLC ontology power supply
It directly powers, can also be powered by external 24V DC power supplier；When examining 220V or so circuit, needing to change voltage class is
The L terminal of the disconnecting relay of 220V, the upper external 220V of PLC connects L line on AC220V alternating current, the N-terminal of the upper external 220V of PLC
N line on son connection AC220V alternating current；
(2) by the DC24V power module mould of the live 220V AC power source access electrical soft fault diagnosis device of digital quantity
Block is powered for the present apparatus；
(3) the common end N of scene slowdown monitoring circuit to be checked is accessed into COM digital fault input interface, by branch to be measured in parallel
Circuit is separately connected digital fault input interface Q1-Qn；
(4) present apparatus is opened, according to the resistance value of the big minor adjustment adjustable resistance of induced voltage, specific adjusting method are as follows: access
After signal end, allows disconnecting relay to be in suction and state, adjustable resistance resistance value is then gradually increased, so that disconnecting relay is just
Release, then opposite direction adjustment adjustable resistance reduce 1K or so resistance, are adjusted to disconnecting relay and are just attracted, to eliminate sense
Answer influence of the voltage to disconnecting relay sensitivity；The present apparatus persistently monitors circuit under test on-line；
(5) when occurring irregular open circuit soft fault in subcircuits to be measured, after disconnecting relay K1 coil moment power loss
Again it is electric, disconnecting relay K1 auxiliary normally opened contact disconnects immediately when power loss, and PLC receives power-off signal and passes through digital fault
Signal handler judgement locking faulty circuit, and store information into corresponding memory block；Disconnecting relay K1 coil is again
When obtaining operating voltage, disconnecting relay K1 is attracted immediately, i.e. disconnecting relay K1 assists normally opened contact closure, and device starts again
It works normally；
(6) maintenance personal searches the fault message that detected subcircuits to be measured occurred by touch screen, to out
Existing fault point carries out precise positioning, and carries out repair and replacement to component in subcircuits to be measured.
The utility model has the beneficial effects that: the present apparatus provides a kind of electrical soft fault diagnosis device of digital quantity, scene
In application, the common end N of scene slowdown monitoring circuit to be checked is accessed COM digital fault input interface, by subcircuits to be measured in parallel
It is separately connected digital fault input interface Q1-Qn, the present apparatus can be monitored circuit under test, and PLC receives signal and leads to
It crosses program and carries out fault point locking, record, can rapidly and accurately solve all kinds of irregular open circuits of system electrical equipment appearance
Soft fault excludes difficult problem, especially in the system being made of multiple equipment, can obtain online prison accurate at the first time
Measured data, the device design scheme is reasonable, and circuit is simple, oneself power consumption is small, high reliablity, exists suitable for all kinds of faulty equipments
The locking of line monitoring and fault point shows great advantages and advantage, greatly with previous experiences method compared with checking method one by one
Service work time and maintenance workload are shortened, while the device has it unrivaled excellent the failure for excluding complicated concealment
Gesture, range detect step by step from big to small, detection failure it is convenient and efficient, and can accomplish it is unattended, after connection, equipment
As long as opening the present apparatus when normal operation leaves scene, until next failure appearance can accurately lock fault point, it is
Production system stable and continuous plays important guarantee.
Detailed description of the invention
Fig. 1 is the member connection structure schematic diagram of the electrical soft fault diagnosis device of digital quantity.
Fig. 2 is the circuit connection diagram of digital signal detection circuit.
Fig. 3 is slowdown monitoring circuit supply voltage to be checked PLC wiring schematic diagram when being 220V.
Fig. 4 is the circuit connection diagram of the digital signal detection circuit of the utility model embodiment.
Specific embodiment
The following are the better embodiments of the utility model, but therefore do not limit the protection scope of the utility model.
A kind of electrical soft fault diagnosis device of digital quantity, including the inspection of DC24V power module, PLC, touch screen, digital signal
Slowdown monitoring circuit, as shown in Figure 1, the DC24V power module input terminal is separately connected N line and L line, institute on live AC220V alternating current
V- and DC24V the power module outlet 24V- for stating touch screen power end are connect, the power end V+ and DC24V power supply mould of touch screen
The 24V+ connection of block output end, the touch screen communication serial ports are connected by communication cable with the communication serial ports of PLC；As shown in Fig. 2,
The input terminal of the PLC connects with digital signal detection circuit output end, the upper PE terminal ground of PLC, and the upper M- terminal of PLC connects 1M
Terminal；
As shown in Fig. 2, the digital signal detection circuit includes disconnecting relay K1-Kn, adjustable resistance R1-Rn, number
One end of failure input interface Q1-Qn, COM digital fault input interface, the disconnecting relay Kn auxiliary normally opened contact is number
Word signal deteching circuit output end, connects with PLC input terminal, and the disconnecting relay Kn auxiliary normally opened contact other end is cascaded
Access the upper L+ terminal of PLC, one end of disconnecting relay Kn wire loop terminal A1 access adjustable resistance Rn, due to measured signal by
External magnetic field influence can generate induced voltage, it will there is the case where disconnecting relay Kn does not reach load voltage value and is attracted,
The resistance value of adjustable resistance Rn is adjusted to suitable resistance value, the induced voltage generated between electrical components, disconnecting relay Kn are eliminated
Reaction speed it is quicker, when circuit is instantaneously disconnected and recovered immediately, disconnecting relay Kn can make a response immediately, avoid
Being in the presence of that circuit instantaneously disconnects and recovers immediately disconnecting relay Kn can not make a response, the adjustable resistance Rn other end and number
Word failure input interface Qn is connected, and the digital fault input interface Qn is for connecting extraneous circuit under test, disconnecting relay Kn
Wire loop terminal A2 accesses COM digital fault input interface, when the both ends of extraneous circuit under test are respectively connected to digital fault
Input interface Qn and COM digital fault input interface, disconnecting relay coil obtain electric, disconnecting relay normally opened contact closure, when
When circuit control signal to be checked is instantaneously disconnected and recovered immediately, due to disconnecting relay coil moment power loss, disconnecting relay is auxiliary
Help normally opened contact to disconnect immediately, disconnecting relay coil get back operating voltage when, disconnecting relay is attracted immediately, the isolation
Relay normally open contact closure, PLC receive power-off signal and by digital fault signal handler judgement locking failure electricity
Road, and the information content is stored to corresponding memory block；
The touch screen is used to search detected fault message, carries out precise positioning to the fault point of appearance and carries out
Maintenance work.
Further, the digital signal detection circuit is equipped with 8, respectively circuit 1, circuit 2, circuit 3, circuit 4, circuit
5, circuit 6, circuit 7, circuit 8(, that is, n=8), the circuit 1 is successively arranged disconnecting relay K1, adjustable resistance R1, digital fault
Input interface Q1, remaining circuit 2-8 is identical with 1 connection type of circuit, disconnecting relay K1-Kn wire loop terminal A2
It is connected in series together, accesses COM digital fault input interface；The present apparatus can monitor 8 circuits simultaneously, and any circuit occurs
Open circuit soft fault, PLC receives power-off signal and by digital fault signal handler judgement locking faulty circuit, to repair
Faulty circuit is accurately positioned in reason personnel, and places under repair.
Further, the PLC selects siemens PLC PLC, and the touch screen selects the Kunlun on-state touch screen, is isolated
Relay selects Schneider RXM2LB2BD, and the DC24V power module selects the western SA5024 of moral power, and the adjustable resistance is selected
Risym P-503 precision adjustable resistance.
The application method of the present apparatus, includes the following steps:
(1) when detecting failure, according to the different voltages grade of signal, the disconnecting relay of relevant voltage grade, example are selected
When such as examining 24V or so circuit, the disconnecting relay that voltage class is 24V is needed to change, PLC input terminal can be by PLC ontology power supply
It directly powers, can also be powered by external 24V DC power supplier；As shown in figure 3, being needed to change when examining 220V or so circuit
Voltage class is the disconnecting relay of 220V, and the L terminal of the upper external 220V of PLC connects L line on AC220V alternating current, and PLC is upper outer
Connect N line on the N-terminal connection AC220V alternating current of 220V；
(2) by the DC24V power module mould of the live 220V AC power source access electrical soft fault diagnosis device of digital quantity
Block is powered for the present apparatus；
It (3), will be in parallel as shown in figure 4, the common end N of scene slowdown monitoring circuit to be checked is accessed COM digital fault input interface
Subcircuits to be measured be separately connected digital fault input interface Q1-Qn；
(4) present apparatus is opened, according to the resistance value of the big minor adjustment adjustable resistance of induced voltage, specific adjusting method are as follows: access
After signal end, allows disconnecting relay to be in suction and state, adjustable resistance resistance value is then gradually increased, so that disconnecting relay is just
Release, then opposite direction adjustment adjustable resistance reduce 1K or so resistance, are adjusted to disconnecting relay and are just attracted, to eliminate sense
Answer influence of the voltage to disconnecting relay sensitivity；The present apparatus persistently monitors circuit under test on-line；
(5) when occurring irregular open circuit soft fault in subcircuits to be measured, after disconnecting relay K1 coil moment power loss
Again it is electric, disconnecting relay K1 auxiliary normally opened contact disconnects immediately when power loss, and PLC receives power-off signal and passes through digital fault
Signal handler judgement locking faulty circuit, and store information into corresponding memory block；Disconnecting relay K1 coil is again
When obtaining operating voltage, disconnecting relay K1 is attracted immediately, i.e. disconnecting relay K1 assists normally opened contact closure, and device starts again
It works normally；
(6) maintenance personal searches the fault message that detected subcircuits to be measured occurred by touch screen, to out
Existing fault point carries out precise positioning, and carries out repair and replacement to component in subcircuits to be measured.
Embodiment 1
As shown in figure 4,4 slowdown monitoring circuits to be checked of existing 220V power supply, carry out electrical soft fault inspection to it using the present apparatus
It surveys, the specific steps are as follows:
(1) disconnecting relay of the present apparatus is changed to the disconnecting relay that voltage class is 220V；
(2) by the DC24V power module mould of the live 220V AC power source access electrical soft fault diagnosis device of digital quantity
Block is powered for the present apparatus；
(3) as shown in figure 3, the L terminal of external 220V connects L line on AC220V alternating current, the upper external 220V of PLC on PLC
N-terminal connection AC220V alternating current on N line, for PLC power；
It (4), will be in parallel as shown in figure 4, the common end N of scene slowdown monitoring circuit to be checked is accessed COM digital fault input interface
4 subcircuits to be measured be separately connected digital fault input interface Q1, Q2, Q3, Q4；
(5) present apparatus is opened, according to the resistance value of the big minor adjustment adjustable resistance of induced voltage, specific adjusting method are as follows: access
After signal end, allows disconnecting relay to be in suction and state, adjustable resistance resistance value is then gradually increased, so that disconnecting relay is just
Release, then opposite direction adjustment adjustable resistance reduce 1K or so resistance, are adjusted to disconnecting relay and are just attracted, to eliminate sense
Answer influence of the voltage to disconnecting relay sensitivity；The present apparatus persistently monitors circuit under test on-line；
(6) when occurring irregular open circuit soft fault, disconnecting relay K1 coil moment power loss in subcircuits 1 to be measured
Afterwards again it is electric, disconnecting relay K1 auxiliary normally opened contact disconnects immediately when power loss, PLC receive power-off signal and by number therefore
Hinder signal handler judgement locking faulty circuit, and stores information into corresponding memory block；Disconnecting relay K1 coil is again
Secondary disconnecting relay K1 is attracted immediately when obtaining operating voltage, i.e. disconnecting relay K1 assists normally opened contact closure, and device is opened again
Begin to work normally；
(7) maintenance personal searches the fault message that detected subcircuits to be measured 1 occurred by touch screen, right
The fault point of appearance carries out precise positioning, and carries out repair and replacement to component in subcircuits 1 to be measured.
Although the utility model is described in detail with reference to the foregoing embodiments, come for those skilled in the art
It says, still technical solution documented by foregoing embodiments can be carried out and be modified, or to part of technical characteristic
It is equivalently replaced, within the spirit and principle of the utility model, any modification, equivalent substitution, improvement and etc. done,
It should be included within the scope of protection of this utility model.
Claims (3)
1. a kind of electrical soft fault diagnosis device of digital quantity, including DC24V power module, PLC, touch screen, digital signal detection
Circuit, it is characterised in that: the DC24V power module input terminal is separately connected N line and L line, institute on live AC220V alternating current
V- and DC24V the power module outlet 24V- for stating touch screen power end are connect, the power end V+ and DC24V power supply mould of touch screen
The 24V+ connection of block output end, the touch screen communication serial ports are connected by communication cable with the communication serial ports of PLC；The PLC's
Input terminal connects with digital signal detection circuit output end, the upper PE terminal ground of PLC, and the upper M- terminal of PLC connects 1M terminal；
The digital signal detection circuit includes disconnecting relay K1-Kn, adjustable resistance R1-Rn, digital fault input interface Q1-
One end of Qn, COM digital fault input interface, the disconnecting relay Kn auxiliary normally opened contact is that digital signal detection circuit is defeated
Outlet connects with PLC input terminal, and the disconnecting relay Kn auxiliary normally opened contact other end, which is cascaded, accesses L+ terminal on PLC,
Disconnecting relay Kn wire loop terminal A1 accesses one end of adjustable resistance Rn, and the adjustable resistance Rn is for inhibiting circuit under test
Generated induced voltage, adjusts the sensitive degree of disconnecting relay Kn, and the adjustable resistance other end and digital fault input
Interface Qn is connected, and the digital fault input interface Qn is for connecting extraneous circuit under test, disconnecting relay Kn wire loop end
Sub- A2 accesses COM digital fault input interface, and the anode of extraneous circuit under test accesses digital fault input interface Qn, extraneous
The cathode of circuit under test accesses COM digital fault input interface, and the present apparatus can be monitored circuit under test, and PLC is received
Signal simultaneously carries out fault point locking, record by program；
The touch screen is used to search detected fault message, carries out precise positioning to the fault point of appearance and carries out maintenance
Work.
2. the electrical soft fault diagnosis device of a kind of digital quantity according to claim 1, it is characterised in that: the digital signal
Detection circuit is equipped with 8, respectively circuit 1, circuit 2, circuit 3, circuit 4, circuit 5, circuit 6, circuit 7, circuit 8, the electricity
Road 1 is successively arranged disconnecting relay K1, adjustable resistance R1, digital fault input interface Q1, and remaining circuit 2-8 is connect with circuit 1
Mode is identical, and disconnecting relay K1-Kn wire loop terminal A2 is connected in series together, and accesses COM digital fault input interface.
3. the electrical soft fault diagnosis device of a kind of digital quantity according to claim 1, it is characterised in that: the PLC is selected
Siemens PLC PLC, the touch screen select the Kunlun on-state touch screen, and disconnecting relay selects Schneider RXM2LB2BD,
The DC24V power module selects the western SA5024 of moral power, and the adjustable resistance selects Risym P-503 precision adjustable resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920504868.3U CN209690776U (en) | 2019-04-15 | 2019-04-15 | A kind of electrical soft fault diagnosis device of digital quantity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920504868.3U CN209690776U (en) | 2019-04-15 | 2019-04-15 | A kind of electrical soft fault diagnosis device of digital quantity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209690776U true CN209690776U (en) | 2019-11-26 |
Family
ID=68607830
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920504868.3U Expired - Fee Related CN209690776U (en) | 2019-04-15 | 2019-04-15 | A kind of electrical soft fault diagnosis device of digital quantity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209690776U (en) |
-
2019
- 2019-04-15 CN CN201920504868.3U patent/CN209690776U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191126 Termination date: 20200415 |