CN207352138U - Induction heating power failure detects in real time and processing system - Google Patents
Induction heating power failure detects in real time and processing system Download PDFInfo
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- CN207352138U CN207352138U CN201721463361.5U CN201721463361U CN207352138U CN 207352138 U CN207352138 U CN 207352138U CN 201721463361 U CN201721463361 U CN 201721463361U CN 207352138 U CN207352138 U CN 207352138U
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Abstract
The utility model discloses a kind of induction heating power failure detection and processing system, including hardware fault process circuit in real time；The hardware fault process circuit is used for the troubleshooting work for completing equipment, including fault logic computing module, fault detect and self-locking module and PWM lockout modules；The fault logic computing module is used to the fault-signal of input determining that current system has fault-free by logical operations such as and-or inverter；When fault logic computing module judges current system in the event of failure, the fault detect blocks total failare signal with self-locking module, does not allow its change；The PWM lockout modules are used to the failure locking signal of fault detect and the output of self-locking module and PWM carrying out logical operation, complete output or the lock-out facility of PWM.The system can handle various faults, processing speed is fast, and scalability is strong, and using flexible, is easily integrated, and has saved the cost of plate-making and device using hardware fault processing strategy.
Description
Technical field
The utility model belongs to control system technical field, and in particular to a kind of induction heating power failure in real time detection with
Processing system.
Background technology
Induction heating power has the advantages that heating-up temperature is high, efficient, speed is fast, non-contact, is increasingly subject to processing
The attention of industry.But in use, some failures occur in induction heating power, if cannot find and handle in time
If these failures, being normally carried out for production will be seriously affected.Can based on sensing heating inverter system exploration project equipment
By the demand of property, it is badly in need of the circuit that one block cost of design is low, troubleshooting speed is fast, scalability is good.
At present, domestic and international motor control and induction heating power system mainly have troubleshooting strategy following two,
First, software fault processing strategy, i.e. sensor gather various fault-signals and are transmitted to main control chip (DSP, microcontroller, ARM
Deng), main control chip judges fault-signal, then makes corresponding processing；Second, special chip handling failure is utilized,
Such as HCPL-316J.Both processing strategy there are it is different the problem of, mainly include：Although software fault processing strategy spirit
Work, cost is low, scalability is good, but processing speed is slower；Although there is troubleshooting using special chip handling failure strategy
Fireballing advantage, but chip can only handle specific failure, and add the cost of plate-making and device.
Utility model content
For the above-mentioned problems in the prior art, it is real-time that the utility model provides a kind of induction heating power failure
Detection and processing system, the system have equipment fault, over current fault, master control block, master control using hardware fault processing strategy
The functions such as unlock, Self-locking for fault, PWM are adjustable to output dead time, processing speed is fast, and scalability is strong, and using flexible, is easy to
It is integrated, save the cost of plate-making and device.
For this reason, the utility model employs following technical scheme：
A kind of induction heating power failure detection and processing system, including hardware fault process circuit in real time；The hardware
Fault logic circuits are used for the troubleshooting work for completing equipment, including fault logic computing module, fault detect and self-locking mode
Block and PWM lockout modules；The fault logic computing module is used to transport the fault-signal of input by logics such as and-or inverter
Calculate and determine that current system has fault-free, total failare signal is low level in the event of failure, otherwise is high level；When fault logic computing
Module judges current system in the event of failure, and the fault detect blocks total failare signal with self-locking module, does not allow its change；
The PWM lockout modules are used to the failure locking signal of fault detect and the output of self-locking module and PWM carrying out logical operation, complete
Output or lock-out facility into PWM.
Further, the fault logic computing module is used to complete function of the hardware circuit to multiple troubleshootings, wraps
Several NAND gates and NOT gate are included, the number of NAND gate is equal to the number of NOT gate, and the total number of door is believed with failure to be processed
Number relation be：Nm=(Ng- 1) × 2, NmFor the total number of door, NgFor the number of failure to be processed.
Further, before the fault logic computing module circuit is located at the fault detect and self-locking modular circuit
Face；The fault-signal is inputted from the fault logic computing module circuit on one side, other end output total failare signal, described total
Fault-signal enters the fault detect and self-locking modular circuit.
Further, the fault detect and self-locking module are used to completing fault-signal self-locking and master control lifts a blockade
Function, including two NAND gates and a NOT gate；The fault detect is divided into 4 kinds of states, including detection with self-locking modular circuit
Fault-signal state, non-blocked styate, released state and fault-signal self-locking state；The detection fault-signal state is current
Circuit is in normal operating conditions, as long as faulty generation, circuit will enter fault-signal self-locking state；The not blocked styate
It is master control unlocking signal input when being always high level, no matter has fault-free generation at this time, the output of failure locking signal is height
Level, circuit are acted on without troubleshooting；The released state is that circuit is in Self-locking for fault state and failure has been solved,
Master control unlocking signal is drawn high into a clock at this time, circuit can jump to detection fault-signal state, into normal mode of operation；
The fault-signal self-locking state is to detect failure and failure locking signal is set to low level until unlocking signal arrives.
Further, the PWM lockout modules are used to decide whether output pwm signal according to failure locking signal, including
Several NAND gates, NOT gate and pull down resistor；It is high level that the NAND gate, which has output during low level input, the NOT gate tool
There is the function that edge is precipitous；The PWM lockout modules are used for realization the dual-use function of signal block and signal shaping.
Further, odd number Schmidt trigger is inserted between two NOT gates of failure locking signal input terminal to form
NOT gate, form the PWM outputs pair of a pair of of adjustable deadband time, directly drive a bridge arm of inverter.
Further, the hardware fault process circuit is realized by CPLD, and in CPLD, which uses structure
Change design to complete, call NAND gate and NOT gate in primitive built in Verilog HDL.
Compared with prior art, the beneficial effects of the utility model are：
(1) it is fast using hardware fault processing strategy, processing speed.
(2) various faults can be handled, scalability is strong, using flexible.
(3) main control chip resource is not take up, reduces the complexity and difficulty of primary control program exploitation.
(4) there is most master control borads chip, the hardware fault process circuits such as CPLD, FPGA to be easily integrated into this at present
In a little chips, the cost of plate-making and device has been saved.
Brief description of the drawings
Fig. 1 is a kind of induction heating power failure provided by the utility model detection in real time and the hardware event of processing system
Hinder process circuit composition structure chart.
Fig. 2 is that a kind of induction heating power failure provided by the utility model detection in real time and the failure of processing system are patrolled
Collect computing module circuit diagram.
Fig. 3 is that a kind of induction heating power failure provided by the utility model detection in real time and the failure of processing system are examined
Survey and self-locking module circuit diagram.
Fig. 4 is that a kind of induction heating power failure provided by the utility model detection in real time and the PWM of processing system are sealed
Lock module circuit diagram.
Fig. 5 is a kind of induction heating power failure provided by the utility model detection in real time and the hardware event of processing system
Hinder process circuit RTL views.
Embodiment
Below in conjunction with the accompanying drawings and specific embodiment describes the utility model in detail, specific embodiment therein and says
It is bright to be only used for explaining the utility model, but be not intended to limit the scope of the present invention.
As shown in Figure 1, the utility model discloses a kind of real-time detection of induction heating power failure and processing system, including
Hardware fault process circuit；The hardware fault process circuit is used for the troubleshooting work for completing equipment, such as IGBT failures, mistake
Failure, master control block, master control unlock, Self-locking for fault are flowed, there is fast response time, scalability is strong, cost is low, easy of integration, removable
The advantages that plant, including fault logic computing module, fault detect and self-locking module and PWM lockout modules；The fault logic
Computing module is used to the fault-signal of input determining that current system has fault-free by logical operations such as and-or inverter, in the event of failure
Total failare signal is low level, otherwise is high level；When fault logic computing module judges current system in the event of failure, it is described therefore
Barrier detection blocks total failare signal with self-locking module, does not allow its change；The PWM lockout modules be used for by fault detect with
The failure locking signal of self-locking module output carries out logical operation with PWM, completes output or the lock-out facility of PWM.
Embodiment
The many because being known as of large scale equipment normal work are influenced, to make well-equipped work, Multiple factors need to be carried out
Monitoring and troubleshooting, then how to make hardware circuit that there is multiple faults disposal ability to become urgent problem.The event
Barrier logical operation module mainly completes function of the hardware circuit to multiple troubleshootings, is mainly made of NAND gate and NOT gate,
As shown in Fig. 2, the wherein number of door and the relation of fault-signal to be processed is：Nm=(Ng- 1) × 2, NmFor the total number of door,
NgFor the number of failure to be processed.The number of NAND gate is equal to the number of NOT gate.Fault logic computing circuit is placed on failure
Detection is conducive to reduce plate-making area and cost with before self-locking modular circuit, greatly reducing the number of self-locking module.
Many fault-signals are pulse signals, and such as over current fault, under-voltage fault, handling these failures needs hardware circuit
There is Self-locking for fault and unlock.The fault detect mainly completes fault-signal self-locking and master control solution with self-locking module
Except the function of block, it is made of two NAND gates and a NOT gate, as shown in Figure 3.It is divided by function, which can be divided into 4
Kind state, that is, detect fault-signal state, non-blocked styate, released state and fault-signal self-locking state.So-called detection event
It is that current circuit is in normal operating conditions to hinder signal condition, as long as faulty generation, circuit will enter fault-signal self-locking shape
State；Blocked styate is not master control unlocking signal input when being always high level, no matter there is fault-free generation, failure block letter at this time
Number output is high level, and circuit is acted on without troubleshooting, is conducive to the tune of circuit board function early period and software program
Examination；Released state is that circuit is in Self-locking for fault state and failure has been solved, when master control unlocking signal being drawn high one at this time
Clock, circuit can jump to detection fault-signal state, into normal mode of operation；Fault-signal self-locking state is to detect failure
And failure locking signal is set to low level until unlocking signal arrives.
The modular circuit is simple in structure, and cost is low, but powerful, and the logic function that it is realized is as shown in table 1.Work is former
Reason is as follows：When master control unlocking signal is high level, no matter current time failure locking signal be in what state with it is next
Moment total failare signal input value is low or high, and next moment failure locking signal output is high level, at this time at circuit
In not blocked styate or released state.When master control unlocking signal is low level, if current time failure locking signal is in low
Level, no matter subsequent time total failare signal input value is low or high, and the output of subsequent time failure locking signal is low level,
Circuit is in fault-signal self-locking state at this time.When master control unlocking signal is low level, if current time failure locking signal
Positioned at high level, next moment total failare signal input value is low level, and circuit is by detection fault-signal condition conversion at this time
For fault-signal self-locking state.
1 fault detect of table and self-locking logic function table (n is current time, and n+1 is subsequent time)
PWM lockout modules mainly decide whether output pwm signal according to failure locking signal, so that equipment safety is reliable
Operation, it is mainly made of NAND gate, NOT gate and pull down resistor, as shown in Figure 4.Make use of NAND gate has the low level defeated
Enter, output is then high level, make use of the NOT gate that Schmidt trigger is formed to have the function of that edge is precipitous, to realize that signal seals
Lock and the dual-use function of signal shaping.Meanwhile the NOT gate of odd number Schmidt trigger composition is may be inserted into shown position, just
The PWM outputs pair of a pair of of adjustable deadband time are may be constructed, directly drive a bridge arm of inverter.
CPLD has that flexible in programming, integrated level are high, design and develop that the cycle is short, the scope of application is wide, design and manufacture cost is low, protects
The features such as close property is strong, price is low is widely used in Industry Control side, it can be achieved that fairly large digital logic circuit design
Face.At present, most master control borads have CPLD, realize geocoding with controlling the I/O port numbers of chip in decoding, increase
Deng.The utility model design realizes hardware fault process circuit with CPLD, has strong antijamming capability, reduces plate-making size, adds
The advantages that close property is strong, cost is low, upgrading is flexible, portable good.In order to simplify design difficulty, in CPLD, the partial circuit
Completed using Structured Design, that is, call the NAND gate in primitive built in Verilog HDL and NOT gate to complete, RTL views are such as
Shown in Fig. 5.The design logic functional simulation is correct, and by plate level verification, and normal use is in the engineering of induction heating power
In project.
The above is only the preferred embodiment of the utility model only, is not intended to limit the present invention, all at this
Any modification, equivalent substitution and improvement made within the spirit and spirit of utility model etc., should be included in this reality
Within new protection domain.
Claims (7)
1. a kind of induction heating power failure detection and processing system, including hardware fault process circuit in real time, it is characterised in that：
The hardware fault process circuit is used for the troubleshooting work for completing equipment, including fault logic computing module, fault detect
With self-locking module and PWM lockout modules；The fault logic computing module is used to the fault-signal of input passing through and-or inverter
Determine that current system has fault-free Deng logical operation, total failare signal is low level in the event of failure, otherwise is high level；Work as failure
Logical operation module judges current system in the event of failure, and the fault detect blocks total failare signal with self-locking module, does not permit
Perhaps it changes；The PWM lockout modules are used to be patrolled the failure locking signal that fault detect is exported with self-locking module with PWM
Computing is collected, completes output or the lock-out facility of PWM.
2. a kind of induction heating power failure according to claim 1 detects in real time and processing system, it is characterised in that：Institute
Fault logic computing module is stated to be used to complete function of the hardware circuit to multiple troubleshootings, including several NAND gates and non-
Door, the number of NAND gate are equal to the number of NOT gate, and the total number of door and the relation of fault-signal to be processed are：Nm=(Ng-1)
× 2, NmFor the total number of door, NgFor the number of failure to be processed.
3. a kind of induction heating power failure according to claim 2 detects in real time and processing system, it is characterised in that：Institute
Fault logic computing module circuit is stated to be located at before the fault detect and self-locking modular circuit；The fault-signal is from described
Fault logic computing module circuit on one side inputs, and other end output total failare signal, the total failare signal enters the failure
Detection and self-locking modular circuit.
4. a kind of induction heating power failure according to any one of claim 1 to 3 detects in real time and processing system, its
It is characterized in that：The fault detect is used to complete the function that fault-signal self-locking and master control are lifted a blockade with self-locking module, wraps
Include two NAND gates and a NOT gate；The fault detect is divided into 4 kinds of states, including detection fault-signal with self-locking modular circuit
State, non-blocked styate, released state and fault-signal self-locking state；The detection fault-signal state is that current circuit is in
Normal operating conditions, as long as faulty generation, circuit will enter fault-signal self-locking state；The not blocked styate is master control solution
Lock signal input is when being always high level, no matter there is fault-free generation at this time, and the output of failure locking signal is high level, circuit
Acted on without troubleshooting；The released state is that circuit is in Self-locking for fault state and failure has been solved, at this time will be main
Control unlocking signal draws high a clock, and circuit can jump to detection fault-signal state, into normal mode of operation；The failure
Signal self-locking state is to detect failure and failure locking signal is set to low level until unlocking signal arrives.
5. a kind of induction heating power failure according to claim 4 detects in real time and processing system, it is characterised in that：Institute
State PWM lockout modules be used for according to failure locking signal decide whether output pwm signal, including several NAND gates, NOT gate with
And pull down resistor；Output is high level when the NAND gate has low level input, and the NOT gate has the function of that edge is precipitous；Institute
State the dual-use function that PWM lockout modules are used for realization signal block and signal shaping.
6. a kind of induction heating power failure according to claim 5 detects in real time and processing system, it is characterised in that：
The NOT gate that odd number Schmidt trigger is formed is inserted between two NOT gates of failure locking signal input terminal, is formed a pair of adjustable
The PWM outputs pair of dead time are saved, directly drive a bridge arm of inverter.
7. a kind of induction heating power failure according to claim 6 detects in real time and processing system, it is characterised in that：Institute
State hardware fault process circuit to realize by CPLD, in CPLD, which is completed using Structured Design, is called
NAND gate and NOT gate in primitive built in Verilog HDL.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721463361.5U CN207352138U (en) | 2017-11-06 | 2017-11-06 | Induction heating power failure detects in real time and processing system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721463361.5U CN207352138U (en) | 2017-11-06 | 2017-11-06 | Induction heating power failure detects in real time and processing system |
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| CN207352138U true CN207352138U (en) | 2018-05-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201721463361.5U Expired - Fee Related CN207352138U (en) | 2017-11-06 | 2017-11-06 | Induction heating power failure detects in real time and processing system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107656218A (en) * | 2017-11-06 | 2018-02-02 | 湖北汽车工业学院 | Induction heating power failure detects in real time and processing system |
| CN111830933A (en) * | 2020-07-16 | 2020-10-27 | 广东亨通光电科技有限公司 | Heating element detection system, method and device and storage medium |
-
2017
- 2017-11-06 CN CN201721463361.5U patent/CN207352138U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107656218A (en) * | 2017-11-06 | 2018-02-02 | 湖北汽车工业学院 | Induction heating power failure detects in real time and processing system |
| CN111830933A (en) * | 2020-07-16 | 2020-10-27 | 广东亨通光电科技有限公司 | Heating element detection system, method and device and storage medium |
| CN111830933B (en) * | 2020-07-16 | 2022-03-29 | 广东亨通光电科技有限公司 | Heating element detection system, method and device and storage medium |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180511 Termination date: 20201106 |
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| CF01 | Termination of patent right due to non-payment of annual fee |