CN108631274A - Device and method and electrical equipment for MCU error protections in electrical equipment - Google Patents
Device and method and electrical equipment for MCU error protections in electrical equipment Download PDFInfo
- Publication number
- CN108631274A CN108631274A CN201810459692.4A CN201810459692A CN108631274A CN 108631274 A CN108631274 A CN 108631274A CN 201810459692 A CN201810459692 A CN 201810459692A CN 108631274 A CN108631274 A CN 108631274A
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- Prior art keywords
- limit value
- pressure limit
- voltage
- mcu
- low pressure
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/20—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for electronic equipment
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/20—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage
- H02H3/202—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage for dc systems
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The embodiment of the present invention provides a kind of device and method and electrical equipment for MCU error protections in electrical equipment, belongs to appliance field.Described device includes：Comparing unit for the output voltage of the MCU to be compared with predetermined voltage range, and exports comparison result；And switch unit, it is electrically connected with the comparing unit and the relay, for disconnecting the relay when the output voltage exceeds the predetermined voltage range according to the comparison result.Whether above-mentioned technical proposal of the present invention can determine MCU in crash, reset state by detecting the output voltage of MCU interfaces, to realize in MCU failures, the relay of load circuit in control electrical equipment can be disconnected reliably, ensure that the safe to use of electrical equipment.
Description
Technical field
The present invention relates to appliance fields, more particularly to a kind of device for MCU error protections in electrical equipment and side
Method and electrical equipment.
Background technology
Currently based on the electric controller of MCU (Micro Control Unit, micro-control unit or microcontroller) in electrical equipment
In application it is more and more common.For example, water heater or closed heating water tank are usually taken MCU and control big work(by relay
Rate heater or have security risk load break-make, Fig. 1 shows that a kind of water heater is controlled negative by MCU in the prior art
The circuit diagram of load, in Fig. 1 MCU control the triode Q1-Q4 for being used as switch respectively by interface 5-8, triode Q1-Q4 is used for
Control relay RY1-RY4 control loops break-make, to MCU can with the disconnection of indirect control relay RY1-RY4 and closure,
Wherein RY2, RY3, RY4 are responsible for controlling the current supply circuit of the first heating tube, and RY1, RY3, RY4 are responsible for controlling the confession of the second heating tube
Electrical circuit just can control the work of two heating tubes as load from there through the control to MCU interface 5-8 output signals
State.Since circuit shown in Fig. 1 belongs to the prior art, and it is merely to illustrate herein and there is MCU in the prior art and pass through relay
Device controls load, therefore electrical equipment for other examples shown in Fig. 1 and circuit theory are not detailed Jie in this
It continues.
But MCU itself is also to have certain failure rate, if there is situations such as crash reset in MCU, it is difficult to ensure after
Electric appliance reliably disconnects.Still by taking water heater as an example, in order to meet the safety requirements such as 3C, CE, VDE, water heater generally use at present
It is electronic temp limiter device or mechanical temperature limiter as protection location, i.e., is protected by method that hard-wired over-temperature bipolar disconnects
It is safe to use to demonstrate,prove electric appliance.The principle of electronic temp limiter device on current market is by Thermal Cutoffs, when container internal temperature is super
When crossing safe temperature, blown fuse, and then the power supply of control section is disconnected, to realize the bipolar disconnection of the power supply of load.So
Regardless of be electronic temp limiter device or mechanical temperature limiter can not all detect MCU whether failure, therefore there is crash reset etc. in MCU
When situation, it is difficult to ensure the safe to use of electrical equipment.
Invention content
In order to solve the above-mentioned problems in the prior art at least partly, the purpose of the embodiment of the present invention is to provide one
Device and method and electrical equipment of the kind for MCU error protections in electrical equipment.
To achieve the goals above, the embodiment of the present invention provides a kind of device for MCU error protections in electrical equipment,
The MCU is used to control the break-make of load supplying circuit by relay, and described device includes：Comparing unit, being used for will be described
The output voltage of MCU is compared with predetermined voltage range, and exports comparison result；And switch unit, it is single compared with described
The first and described relay electrical connection, for according to the comparison result, exceeding the predetermined voltage range in the output voltage
When, disconnect the relay.
Optionally, the comparing unit includes first comparator and the second comparator, is respectively used to the output voltage
It is compared with high pressure limit value and low pressure limit value, and exports the first comparison result and the second comparison result respectively；Wherein, the height
Pressure limit value and the low pressure limit value limit the predetermined voltage range jointly.
Optionally, the switch unit includes the high pressure being connect respectively with the first comparator and second comparator
Limit value switchs and low pressure limit value switch, and when first comparison result indicates that the output voltage is more than the high pressure limit value
When, the high pressure limit value switch disconnects, when second comparison result indicates that the output voltage is less than the low pressure limit value,
The low pressure limit value switch disconnects；Wherein, when any one in high pressure limit value switch and low pressure limit value switch is disconnected
When opening, the relay disconnects.
Optionally, the high pressure limit value switch and low pressure limit value switch are electric for the switch being made of triode and resistance
Road.
Optionally, described device further includes High voltage output unit and low pressure output unit, wherein the High voltage output unit
For providing the voltage corresponding to the high pressure limit value to the first comparator, the low pressure output unit is used for described the
Two comparators provide the voltage corresponding to the low pressure limit value.
Optionally, the High voltage output unit and low pressure output unit respectively include two divider resistances being connected in series with.
On the other hand, embodiment of the present invention also provides a kind of method for MCU error protections in electrical equipment, described
MCU is used to control the break-make of load supplying circuit by relay, the method includes：By the output voltage of the MCU and in advance
If voltage range is compared；And when the output voltage exceeds the predetermined voltage range, disconnect the relay.
Optionally, the output voltage by the MCU be compared with predetermined voltage range including：By output electricity
Pressure is compared with high pressure limit value and low pressure limit value respectively；Wherein, high pressure limit value and low pressure limit value limit the default electricity jointly
Press range.
Optionally, the method further includes：The voltage corresponding to the high pressure limit value is provided by High voltage output unit, is led to
It crosses low pressure output unit and the voltage for corresponding to the low pressure limit value is provided；Wherein, the High voltage output unit and low pressure output are single
Member respectively includes two divider resistances being connected in series with.
On the other hand, embodiment of the present invention also provides a kind of electrical equipment, and the electrical equipment includes above-mentioned is used for
The device of MCU error protections in electrical equipment.
Above-mentioned technical proposal of the present invention can by detect MCU interfaces output voltage come determine MCU whether in crash,
Reset state, to realize in MCU failures, controlling the relay of the load circuit in electrical equipment can reliably disconnect, and protect
The safe to use of electrical equipment is demonstrate,proved.
The other feature and advantage of the embodiment of the present invention will be described in detail in subsequent specific embodiment part.
Description of the drawings
Attached drawing is further understood to the embodiment of the present invention for providing, an and part for constitution instruction, under
The specific implementation mode in face is used to explain the embodiment of the present invention together, but does not constitute the limitation to the embodiment of the present invention.Attached
In figure：
Fig. 1 is that a kind of water heater passes through the circuit diagram of MCU control loads in the prior art；
Fig. 2 is the block diagram for the device of MCU error protections in electrical equipment that one embodiment of the present invention provides；
Fig. 3 is the frame for the device of MCU error protections in electrical equipment that a kind of optional embodiment of the present invention provides
Figure；
Fig. 4 is the circuit diagram for the comparing unit that a kind of preferred embodiment of the present invention provides；
Fig. 5 is the circuit diagram for the High voltage output unit that a kind of preferred embodiment of the present invention provides；
Fig. 6 is the circuit diagram for the low pressure output unit that a kind of preferred embodiment of the present invention provides；And
Fig. 7 is the circuit diagram for the switch unit that a kind of preferred embodiment of the present invention provides.
Reference sign
10 comparing unit, 20 switch unit
30 relays 40 load
11 first comparator, 12 second comparator
21 high pressure limit value switch, 22 low pressure limit value switchs
31 High voltage output unit, 32 low pressure output unit
R1-R27 resistance C1-C15 capacitances
Q1-Q8 triode RY1-RY4 relays
D1-D8 diode T1 mutual inductors
VCC_IN power input port VCC_OUT output port of power source
Specific implementation mode
The specific implementation mode of the embodiment of the present invention is described in detail below in conjunction with attached drawing.It should be understood that this
The described specific implementation mode in place is merely to illustrate and explain the present invention embodiment, is not intended to restrict the invention embodiment.
Fig. 2 is the block diagram for the device of MCU error protections in electrical equipment that one embodiment of the present invention provides.Such as
Shown in Fig. 2, embodiment of the present invention provides a kind of device for MCU error protections in electrical equipment, and the MCU is for passing through
Relay 30 controls the break-make of load supplying circuit 40, and described device includes comparing unit 10 and switch unit 20.Wherein, compare
Unit 10 exports comparison result for the output voltage of MCU to be compared with predetermined voltage range.Switch unit 20 with than
It is electrically connected compared with unit 10 and relay 30, for according to the comparison result, exceeding the predeterminated voltage in the output voltage
When range, the relay 30 is disconnected.
In the specific implementation, MCU can export square-wave signal by MCU interfaces, in the case of MCU normal operations, according to
Relevant criterion (such as IEC60335 standards), the voltage of the square-wave signal should be in a zone of reasonableness.Therefore in this implementation
In mode, the range of the voltage (i.e. output voltage) of the square-wave signal of MCU can be carried out advance based on the regulation of relevant criterion
Setting.The output voltage of MCU can be compared by comparing unit 10 with predetermined voltage range, when the output unit of MCU exceeds
When preset range, illustrating that the case where crashing, resetting occurs in MCU, comparing unit 10 disconnects relay by switch unit 20 at this time,
To ensure the safe to use of electrical equipment.Wherein, switch unit 20 can be located at the control loop side of relay 30, can lead to
It crosses and is broken as the power supply of 30 control loop of relay power supply to realize disconnection relay 30.
Above-mentioned technical proposal of the present invention can by detect MCU interfaces output voltage come determine MCU whether in crash,
Reset state, to realize in MCU failures, controlling the relay of the load circuit in electrical equipment can reliably disconnect, and protect
The safe to use of electrical equipment is demonstrate,proved.
Fig. 3 is the frame for the device of MCU error protections in electrical equipment that a kind of optional embodiment of the present invention provides
Figure.As shown in figure 3, in a kind of optional embodiment of the present invention, comparing unit 10 compares including first comparator 11 and second
Device 12.Wherein, first comparator 11 is for the output voltage of MCU to be compared with high pressure limit value, and exports first and compare knot
Fruit, the second comparator 12 export the second comparison result for the output voltage of MCU to be compared with low pressure limit value.Wherein,
High pressure limit value and low pressure limit value limit the predetermined voltage range jointly.
In this optional embodiment, described device further includes High voltage output unit 31 and low pressure output unit 32, wherein
High voltage output unit 31 be used for first comparator 11 provide corresponding to the high pressure limit value voltage (such as provide equivalence in institute
State the voltage of high pressure limit value), low pressure output unit 32 is used to provide the electricity corresponding to the low pressure limit value to the second comparator 12
Pressure.The voltage that first comparator 11 and the second comparator 12 can respectively export MCU output voltages and High voltage output unit 31
The voltage exported with low pressure output unit 32 is compared, so as to judge whether the voltage of MCU outputs is more than high pressure limit value
Or it is less than low pressure limit value.
In addition, in this optional embodiment, switch unit 20 further includes the high pressure limit value being connect with first comparator 11
Switch 21 and the low pressure limit value switch 22 being connect with the second comparator 12.When first comparison result indicates the output voltage
When more than the high pressure limit value, high pressure limit value switch 21 disconnects, when second comparison result indicates that the output voltage is less than
When the low pressure limit value, the low pressure limit value switch 22 disconnects.Wherein, high pressure limit value switch 21 and low pressure limit value switch 22 are common
The control loop for controlling relay 30, when any one disconnection in high pressure limit value switch 21 and low pressure limit value switch 22,
The control loop of relay 30 can be caused to power off, so that the relay 30 disconnects.
Fig. 4 is the circuit diagram for the comparing unit that a kind of preferred embodiment of the present invention provides.As shown in figure 4, in the present invention
In a kind of preferred embodiment, the comparing unit includes two comparators, and the square-wave signal of MCU outputs passes through by resistance R11
It is separately input into comparing unit with the capacitance C11 resistance-capacitance circuits formed and the resistance-capacitance circuit being made of resistance R10 and capacitance C10
In two comparators in, and in a comparator respectively with from High voltage output unit output voltage Vhigh and low pressure export
The Vlow of unit is compared.Wherein, MCU is exported to the voltage value V0 of the square-wave signal of comparator and is expired when MCU is worked normally
Sufficient Vlow<V0<Vhigh, therefore when MCU is worked normally, voltage value V0 ratio Vhigh voltage values are low, the second comparison result signal
For high level, and voltage value V0 ratio Vlow voltage values are high, and the first comparison result signal is also high level.
Fig. 5 and Fig. 6 is the High voltage output unit and low pressure output unit that a kind of preferred embodiment of the present invention provides respectively
Circuit diagram.As shown in Figure 5 and Figure 6, High voltage output unit includes divider resistance R12, R13 and the capacitance C14 to shield,
Wherein divider resistance R12, R13 divides 5V voltages, with output voltage Vhigh, low pressure output unit include R15, R16 and
The capacitance C15 of protection is played, wherein divider resistance R15, R16 divides 5V voltages, with output voltage Vlow, wherein Vlow,
Vhigh can be determined according to the relevant criterion of electrical apparatus industry.
Although it will be appreciated by persons skilled in the art that the above-mentioned High voltage output list given based on voltage dividing resistance circuit
The specific implementation of member and low pressure output unit, but High voltage output unit and low pressure output unit are not limited to foregoing circuit shape
Formula, such as High voltage output unit and low pressure output unit may be operational amplifier circuit or regulated power supply etc..
Fig. 7 is the circuit diagram for the switch unit that a kind of preferred embodiment of the present invention provides.As shown in fig. 7, switch unit
By as switch triode Q5-Q8 and resistance R19-R22, R24-R27 form, wherein triode Q5, Q6 and resistance R19-R22
Form high pressure limit value switch, triode Q7, Q8 and resistance R24-R27 composition low pressure limit value switches.It is made of triode in Fig. 7
The effect of switch unit is the connection between conducting and the disconnection ports VCC_IN and the ports VCC_OUT.Wherein, the ports VCC_IN are
Power input port, the ports VCC_OUT are output port of power source.As shown in fig. 7, the triode Q6 and Q8 in switch unit are equal
When conducting, the ports VCC_IN provide power supply for the ports VCC_OUT, and then the ports VCC_OUT can be the relay RY1- in Fig. 1
The control loop of RY4 provides power supply.
It will be appreciated by persons skilled in the art that the form that above-mentioned switch unit is not limited by transistor circuit is come in fact
Existing, switch unit can also be realized such as by electrical equipment midget relay, breaker.
As shown in Figure 4-Figure 7, described for MCU error protections in electrical equipment in alternative embodiment of the present invention
At work, the output voltage V0 of MCU passes through the voltage value that two comparators are generated with fixed partial pressure circuit R12 and R13 to device
The voltage value Vlow that Vhigh and R15 and R16 is generated is compared.When MCU is worked normally, output voltage V0 meets
Vlow<V0<Vhigh, the first comparison result signal and the second comparison result signal are high level at this time.First comparison result is believed
When number being high level, triode Q5 conducting can be controlled, so that triode Q6 conductings；Second comparison result signal is high electricity
Usually, triode Q7 conductings can be controlled, so that triode Q8 conductings.When triode Q6, Q8 are both turned on, the ends VCC_IN
Access is formed between mouth and the ports VCC_OUT, electric signal can be the control of the relay RY1-RY4 in Fig. 1 by the ports VCC_OUT
Circuit processed provides power supply.If MCU is in crash or reset state, the voltage value of V0 ratios Vlow can be caused low or V0 ratios
The voltage value of Vhigh is high, and accordingly, the first comparison result signal or the second comparison result signal can be low levels, to make
It obtains triode Q6 or Q8 and is in cut-off state so that the circuit of the ports VCC_IN to the ports VCC_OUT is cut off, at this time relay
The power supply of RY1-RY4 relay control circuits is cut off, then relay RY1-RY4 is disconnected, to the power supply circuit of load
It is disconnected.
Above-mentioned technical proposal through the invention, can be in the case where microcontroller be in crash, reset state (i.e. in twin failure
Under), still it can realize the bipolar disconnection of load supplying power supply by disconnecting relay, to realize that safety cut-off loads,
It has ensured the safe to use of electrical equipment, and has met the requirement of IEC60335 standards.
Embodiment of the present invention also provides a kind of method for MCU error protections in electrical equipment, and the MCU is for leading to
The break-make of electrical equipment control of adopting load supplying circuit, the method includes：
The output voltage of the MCU is compared by step S101 with predetermined voltage range.
Step S102 disconnects the relay when the output voltage exceeds the predetermined voltage range.
In a kind of optional embodiment of the present invention, the output voltage by the MCU is carried out with predetermined voltage range
Compare including：The output voltage is compared with high pressure limit value and low pressure limit value respectively.Wherein, high pressure limit value and low pressure limit
Value limits the predetermined voltage range jointly.
In a kind of optional embodiment of the present invention, the method further includes：Corresponded to by the offer of High voltage output unit
The voltage of high pressure limit value provides the voltage corresponding to low pressure limit value by low pressure output unit.Wherein, the High voltage output unit
Two divider resistances being connected in series with are respectively included with low pressure output unit.
The specific implementation details for the method for MCU error protections in electrical equipment about embodiment of the present invention can join
It is admitted to the embodiment stated about for the device of MCU error protections in electrical equipment, is not being repeated in this.
Embodiment of the present invention also provides a kind of electrical equipment, and the electrical equipment includes above-mentioned in electrical equipment
The device of MCU error protections.
The optional embodiment of the embodiment of the present invention is described in detail above in association with attached drawing, still, the embodiment of the present invention is simultaneously
The detail being not limited in the above embodiment can be to of the invention real in the range of the technology design of the embodiment of the present invention
The technical solution for applying example carries out a variety of simple variants, these simple variants belong to the protection domain of the embodiment of the present invention.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case of shield, it can be combined by any suitable means.In order to avoid unnecessary repetition, the embodiment of the present invention pair
Various combinations of possible ways no longer separately illustrate.
It will be appreciated by those skilled in the art that it is that can pass through to implement the method for the above embodiments
Program is completed to instruct relevant hardware, which is stored in a storage medium, including some instructions use so that
MCU, chip or processor (processor) perform all or part of the steps of the method described in the various embodiments of the present invention.And it is preceding
The storage medium stated includes：USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory
The various media that can store program code such as (RAM, Random Access Memory), magnetic disc or CD.
In addition, arbitrary combination can also be carried out between a variety of different embodiments of the embodiment of the present invention, as long as it is not
The thought of the embodiment of the present invention is violated, disclosure of that of the embodiment of the present invention is equally should be considered as.
Claims (10)
1. a kind of device for MCU error protections in electrical equipment, the MCU is used to control load supplying electricity by relay
The break-make on road, which is characterized in that described device includes：
Comparing unit for the output voltage of the MCU to be compared with predetermined voltage range, and exports comparison result；With
And
Switch unit is electrically connected with the comparing unit and the relay, is used for according to the comparison result, in the output
When voltage exceeds the predetermined voltage range, the relay is disconnected.
2. the apparatus according to claim 1, which is characterized in that the comparing unit includes that first comparator and second are compared
Device is respectively used to the output voltage being compared with high pressure limit value and low pressure limit value, and exports the first comparison result respectively
With the second comparison result；
Wherein, the high pressure limit value and the low pressure limit value limit the predetermined voltage range jointly.
3. the apparatus of claim 2, which is characterized in that the switch unit include respectively with the first comparator
The high pressure limit value switch and low pressure limit value switch connected with second comparator, and when first comparison result indicates institute
When stating output voltage more than the high pressure limit value, the high pressure limit value switch disconnects, described in second comparison result instruction
When output voltage is less than the low pressure limit value, the low pressure limit value switch disconnects；
Wherein, when any one disconnection in high pressure limit value switch and low pressure limit value switch, the relay is disconnected
It opens.
4. device according to claim 3, which is characterized in that the high pressure limit value switch and low pressure limit value switch are
The switching circuit being made of triode and resistance.
5. the apparatus of claim 2, which is characterized in that described device further includes High voltage output unit and low pressure output
Unit, wherein the High voltage output unit is used to provide the voltage for corresponding to the high pressure limit value, institute to the first comparator
Low pressure output unit is stated for providing the voltage corresponding to the low pressure limit value to second comparator.
6. device according to claim 5, which is characterized in that the High voltage output unit and low pressure output unit wrap respectively
Include two divider resistances being connected in series with.
7. a kind of method for MCU error protections in electrical equipment, the MCU is used to control load supplying electricity by relay
The break-make on road, which is characterized in that the method includes：
The output voltage of the MCU is compared with predetermined voltage range；And
When the output voltage exceeds the predetermined voltage range, the relay is disconnected.
8. the method according to the description of claim 7 is characterized in that the output voltage by the MCU and predeterminated voltage model
Enclose be compared including：
The output voltage is compared with high pressure limit value and low pressure limit value respectively；
Wherein, high pressure limit value and low pressure limit value limit the predetermined voltage range jointly.
9. according to the method described in claim 8, it is characterized in that, the method further includes：It is provided by High voltage output unit
Corresponding to the voltage of the high pressure limit value, the voltage of the indication low-voltage limit value is corresponded to by low pressure output unit；
Wherein, the High voltage output unit and low pressure output unit respectively include two divider resistances being connected in series with.
10. a kind of electrical equipment, which is characterized in that the electrical equipment includes such as claim 1-6 any one claims
The device for MCU error protections in electrical equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810459692.4A CN108631274A (en) | 2018-05-15 | 2018-05-15 | Device and method and electrical equipment for MCU error protections in electrical equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810459692.4A CN108631274A (en) | 2018-05-15 | 2018-05-15 | Device and method and electrical equipment for MCU error protections in electrical equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108631274A true CN108631274A (en) | 2018-10-09 |
Family
ID=63693279
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810459692.4A Pending CN108631274A (en) | 2018-05-15 | 2018-05-15 | Device and method and electrical equipment for MCU error protections in electrical equipment |
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| Country | Link |
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| CN (1) | CN108631274A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111157875A (en) * | 2019-12-31 | 2020-05-15 | 西安翔腾微电子科技有限公司 | Open-state load open-circuit detection circuit and method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2244783Y (en) * | 1995-12-01 | 1997-01-08 | 四川八达电子流量技术研究所 | Automatic detecting protector for input under-voltage or overvoltage of computerized oil feeder |
| CN102684652A (en) * | 2012-06-04 | 2012-09-19 | 浙江榆阳电子有限公司 | Synchronous pulse control circuit for preventing faults of microprogrammed control unit (MCU) or driving integrated circuit (IC) |
-
2018
- 2018-05-15 CN CN201810459692.4A patent/CN108631274A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2244783Y (en) * | 1995-12-01 | 1997-01-08 | 四川八达电子流量技术研究所 | Automatic detecting protector for input under-voltage or overvoltage of computerized oil feeder |
| CN102684652A (en) * | 2012-06-04 | 2012-09-19 | 浙江榆阳电子有限公司 | Synchronous pulse control circuit for preventing faults of microprogrammed control unit (MCU) or driving integrated circuit (IC) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111157875A (en) * | 2019-12-31 | 2020-05-15 | 西安翔腾微电子科技有限公司 | Open-state load open-circuit detection circuit and method |
| CN111157875B (en) * | 2019-12-31 | 2021-11-02 | 西安翔腾微电子科技有限公司 | Open-state load open-circuit detection circuit and method |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181009 |
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| RJ01 | Rejection of invention patent application after publication |