CN202057987U - Control logic signal output circuit - Google Patents
Control logic signal output circuit Download PDFInfo
- Publication number
- CN202057987U CN202057987U CN2011202731639U CN201120273163U CN202057987U CN 202057987 U CN202057987 U CN 202057987U CN 2011202731639 U CN2011202731639 U CN 2011202731639U CN 201120273163 U CN201120273163 U CN 201120273163U CN 202057987 U CN202057987 U CN 202057987U
- Authority
- CN
- China
- Prior art keywords
- signal
- controller
- circuit
- control logic
- logic signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Landscapes
- Safety Devices In Control Systems (AREA)
Abstract
The present utility model discloses a control logic signal output circuit. The control logic signal output end of a first controller of the control logic signal output circuit is connected with the first input end of a signal gating circuit, the output end of a hardware control logic signal generating circuit is connected with the second input end of the signal gating circuit, the output end of a second controller is connected with the control signal input end of the signal gating circuit, the output end of a watchdog reset circuit is connected with the reset signal input end of the first controller, the dog-feeding signal output end of the first controller is respectively connected with the input end of the watchdog reset circuit and the signal input end of the second controller, and the transmission end of the signal gating circuit is the control logic signal output end of the control logic signal output circuit. By adopting the control logic signal output circuit, during the recovering process of the first controller from dead halt to fresh reset work, correct control logic signals can still be outputted by the system continuously, and the reliability of the power supply can be increased.
Description
[technical field]
The utility model relates to power supply, relates in particular to a kind of steering logic signal output apparatus.
[background technology]
The power supply universal demand has intellectuality now, therefore uses MCU or other programmable controllers in design usually.But these programmable controllers all might enter the deadlock state because certain interference or bug cause program fleet, may influence the operation stability and the reliability of relevant device, even cause the substantial equipment accident and cause enormous economic loss.Common way is to adopt the watchdog circuit monitor controller, as depicted in figs. 1 and 2, controller can regularly be fed dog, because crashing or run, certain reason can't to watchdog chip provide feeding-dog signal when flying when controller, through (TIME after a while, this time is determined by watchdog chip) after, watchdog chip does not receive that feeding-dog signal then sends reset signal RESET to controller controller is restarted.Again send feeding-dog signal after controller resets, thereby anti-locking system enters the deadlock state.But this method can only solve the problem that controller crashes; reset from the watchdog chip that crashes at controller; until controller restarts in the work during this period of time; the pin level of controller can't keep normal condition; it is continuous that its steering logic signal can't keep equally; each power supply does not obtain normal control signal, thereby causes the collapse of the undesired or system of system, can not satisfy the requirement of high reliability power supply.
[summary of the invention]
The technical problems to be solved in the utility model is to overcome the deficiency that prior art can not guarantee that the steering logic signal is continuous, provide and be beneficial to the high reliability application demand, solve the unexpected steering logic signal output apparatus that still can realize the uninterrupted output of steering logic signal when flying that runs of controller.
In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is, a kind of steering logic signal output apparatus, comprise first controller, second controller, watchdog reset circuit, the signal gating circuit, the hardware control logic signal generating circuit, the steering logic signal output part of first controller is connected with the first input end of signal gating circuit, the output terminal of hardware control logic signal generating circuit is connected with second input end of signal gating circuit, the output terminal of second controller is connected with the signal input end of signal gating circuit, the output terminal of watchdog reset circuit is connected with the reset signal input end of first controller, the feeding-dog signal output terminal of first controller connects the input end of watchdog reset circuit and the signal input part of second controller respectively, and the defeated end of signal gating circuit is the output terminal of steering logic signal output apparatus steering logic signal.
The utility model steering logic signal output apparatus has increased by second controller and hardware control logic signal generating circuit, guaranteed that this circuit is first controller resets the process of work again from crashing, system still can export correct steering logic signal continuously, has improved the reliability of power supply.
[description of drawings]
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
Fig. 1 is the theory diagram of prior art logical signal output circuit.
Fig. 2 is the sequential chart of prior art logical signal output circuit.
Fig. 3 is the theory diagram of the utility model system logical signal output circuit embodiment.
Fig. 4 is the sequential chart of the utility model system logical signal output circuit.
[embodiment]
As shown in Figure 3, among the embodiment of the utility model steering logic signal output apparatus, comprise first controller, second controller, watchdog reset circuit, signal gating circuit, hardware control logic signal generating circuit.The steering logic signal output part of first controller is connected with the first input end of signal gating circuit, the output terminal of hardware control logic signal generating circuit is connected with second input end of signal gating circuit, the output terminal of second controller is connected with the signal input end of signal gating circuit, the output terminal of watchdog reset circuit is connected with the reset signal input end of first controller, the feeding-dog signal output terminal of first controller connects the input end of watchdog reset circuit and the signal input part of second controller respectively, the defeated end of signal gating circuit is the output terminal of steering logic signal output apparatus steering logic signal, is connected with the signal input part of controlled plant.
As shown in Figure 3 and Figure 4, when the first controller operate as normal.By of steering logic signal output part (logic out) output of the first controller output control logic signal (Control logic) by the steering logic signal output apparatus.The control signal SW of the change-over switch S of the signal gating circuit that second controller sends is in the low level position, as the SW signal among Fig. 4.First controller sends feeding-dog signal and gives the watchdog reset circuit and second controller, as the WDT signal among Fig. 4.
When crashing for a certain reason, first controller can't send feeding-dog signal, second controller is not received the feeding-dog signal of first controller in the period that surpasses gate time T1, control signal SW with the change-over switch S of signal gating circuit converts high level to immediately, shown in the SW among Fig. 4.The change-over switch S of signal gating circuit converts to the hardware control logic signal generating circuit and is connected, and takes over the steering logic signal output part (logic out) that logic control outputs to circuit by the hardware control logic signal generating circuit.
After first controller stopped to send feeding-dog signal a period of time (TIME), watchdog reset circuit sent reset enable signal first controller and resets, shown in the RESET among Fig. 4.
After the hardware control logic signal generating circuit was taken over, second controller can detect first controller always and whether send normal feeding-dog signal.If first controller never sends normal feeding-dog signal, then second controller is then exported the SW signal of high level always, makes circuit remain on hardware and takes over state, sends normal feeding-dog signal up to first controller.
Rework after first controller resets and send normal feeding-dog signal once more.Second controller detects a period of time of delaying time again behind the normal feeding-dog signal of first controller and waits until that the output of first controller reaches conversion switching signal SW after the normal condition, the SW signal becomes low level by high level once more, as shown in Figure 4, make logic control output return to software control from hardware controls.
Claims (1)
1. steering logic signal output apparatus, it is characterized in that, comprise first controller, second controller, watchdog reset circuit, the signal gating circuit, the hardware control logic signal generating circuit, the steering logic signal output part of first controller is connected with the first input end of signal gating circuit, the output terminal of hardware control logic signal generating circuit is connected with second input end of signal gating circuit, the output terminal of second controller is connected with the signal input end of signal gating circuit, the output terminal of watchdog reset circuit is connected with the reset signal input end of first controller, the feeding-dog signal output terminal of first controller connects the input end of watchdog reset circuit and the signal input part of second controller respectively, and the defeated end of signal gating circuit is the output terminal of steering logic signal output apparatus steering logic signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202731639U CN202057987U (en) | 2011-07-29 | 2011-07-29 | Control logic signal output circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202731639U CN202057987U (en) | 2011-07-29 | 2011-07-29 | Control logic signal output circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202057987U true CN202057987U (en) | 2011-11-30 |
Family
ID=45017957
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202731639U Expired - Lifetime CN202057987U (en) | 2011-07-29 | 2011-07-29 | Control logic signal output circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202057987U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108382355A (en) * | 2018-04-20 | 2018-08-10 | 深圳市沃特沃德股份有限公司 | Vehicle-mounted monitoring device |
-
2011
- 2011-07-29 CN CN2011202731639U patent/CN202057987U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108382355A (en) * | 2018-04-20 | 2018-08-10 | 深圳市沃特沃德股份有限公司 | Vehicle-mounted monitoring device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111736514B (en) | Robot control system based on general computer | |
| CN203191965U (en) | Watchdog timer circuit, power IC and watchdog monitoring system | |
| CN106951336B (en) | MCU (microprogrammed control Unit) resetting method, device and system | |
| CN110879565A (en) | Dual-computer redundancy control system and redundancy control/fault monitoring method and device thereof | |
| CN102055633A (en) | Satellite-borne double-CAN (Controller Area Network) bus node failure self-restoration system | |
| CN103901772A (en) | Double-DSP redundancy inertial-platform controller | |
| CN103853622A (en) | Control method of dual redundancies capable of being backed up mutually | |
| CN202711238U (en) | Watchdog circuit | |
| CN202421819U (en) | Triple redundancy analog output module for DCS (Distributed Control System) | |
| CN103176870A (en) | Multi-mode information interaction redundancy safety computer platform | |
| CN111698139A (en) | RS485 bus multi-host competition switching method | |
| CN107436596B (en) | Main and auxiliary MCU redundancy monitoring method of electric power steering system | |
| CN205068150U (en) | Redundant control system | |
| CN104597827A (en) | Smart electric control execution system supporting loop redundancy control and control method thereof | |
| CN202057987U (en) | Control logic signal output circuit | |
| CN105183509A (en) | Apparatus and method for realizing shutdown of system power after soft-off | |
| CN111930573B (en) | Task-level dual-machine hot standby system based on management platform and method thereof | |
| CN103472746B (en) | The redundancy control method of dual master control equipment and dual master control equipment | |
| CN109739697B (en) | High-speed data exchange-based strong real-time dual-computer synchronization fault-tolerant system | |
| CN203616975U (en) | Graphics display device | |
| CN107861421B (en) | Dual-redundancy control device and method based on distributed system master-slave rotation type | |
| CN202694075U (en) | Output circuit | |
| CN204256727U (en) | A kind of multimachine remote debugging accurate synchronization system | |
| CN204631571U (en) | A kind of industrial robot safety control system and backup safety circuit, security module | |
| CN210041307U (en) | Power supply system power failure protection system based on PLC control |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20111130 |
|
| CX01 | Expiry of patent term |