CN207234519U - Outage detection control circuit and gas meter, flow meter - Google Patents
Outage detection control circuit and gas meter, flow meter Download PDFInfo
- Publication number
- CN207234519U CN207234519U CN201721195943.XU CN201721195943U CN207234519U CN 207234519 U CN207234519 U CN 207234519U CN 201721195943 U CN201721195943 U CN 201721195943U CN 207234519 U CN207234519 U CN 207234519U
- Authority
- CN
- China
- Prior art keywords
- power supply
- circuit
- electrically connected
- controller
- external power
- 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.)
- Active
Links
Landscapes
- Measuring Volume Flow (AREA)
Abstract
The utility model proposes a kind of outage detection control circuit and gas meter, flow meter, it is related to outage detection technical field.The outage detection control circuit includes power failure detection circuit, power supply circuit and controller, and the power failure detection circuit is electrically connected with the power supply circuit, controller and external power supply, and the power supply circuit is electrically connected with the controller, external power supply.The power supply circuit charges in exterior plant-grid connection, after external power supply disconnects, the power supply circuit continues to provide voltage to power failure detection circuit and controller by electric discharge, the controller is when power failure detection circuit detects external power supply power-off, gas meter, flow meter is controlled to perform the first operation, and when power failure detection circuit detects that external power supply accesses again, gas meter, flow meter is controlled to perform the second operation, by judging the electric power thus supplied of external power supply accurately and in time, the safety switch valve of gas meter, flow meter and the security performance of data storage ensure that.
Description
Technical field
Outage detection technical field is the utility model is related to, in particular to a kind of outage detection control circuit and combustion
Gas meter.
Background technology
At this stage, the safe handling of combustion gas has become the most important thing of life at home, and gas meter, flow meter should the initial period
The metering for using combustion gas data with only showing, meter reading needs manually to realize, and the meter reading of registering one's residence visited not only disturbs residents, Er Qiexiao
Rate is low, and labor intensity is big, is also not easy to gas company's service platform charge and management.With technology of Internet of things and sensor technology
Continuous development, the application of gas meter, flow meter is more and more extensive, also more intelligent, and not only solve that manual metering brings is a variety of tired
Border, moreover it is possible to which monitoring user's gas is safe to use in real time, when combustion gas is using occurring abnormal, can notify that user or management are flat in time
Platform is handled, situations such as avoiding occurring leak, catch fire, exploding.Therefore, the normal work of gas meter, flow meter is particularly important.
Gas meter, flow meter may disconnect the situation for occurring powering off due to external power supply in use, for example, externally fed
Cell damage, electric quantity consumption is complete etc., and reason, these situations are all sporadic, have no idea to be controlled.And for combustion gas
For table, just it can not be worked normally after power-off, it is disconnected suddenly when occurring if being unable to the electric power thus supplied of real-time perception external power supply
During the situation of electricity, the operation such as data service storage, data sending, Valve controlling is carried out without time margin, gas meter, flow meter is because suddenly
Power-off is likely to result in internal processes disorder, and then causes damage or the loss of meter reading data, it is difficult to ensures valve switch control
Security, user's gas behaviour in service can not be monitored again.
Utility model content
The purpose of this utility model is to provide a kind of outage detection control circuit, to detect the power supply of external power supply in real time
Situation, and the operations such as switch valve, data storage, transmission are performed according to testing result.
The purpose of this utility model, which also resides in, provides a kind of gas meter, flow meter, to detect the electric power thus supplied of external power supply in real time, and
The operations such as switch valve, data storage, transmission are performed according to testing result.
To achieve these goals, the technical solution that the utility model embodiment uses is as follows：
In a first aspect, the utility model proposes a kind of outage detection control circuit, the outage detection control circuit includes
Power failure detection circuit, power supply circuit and controller, the power failure detection circuit and the power supply circuit, controller and external power supply
It is electrically connected, the power supply circuit is electrically connected with the controller, external power supply；The power supply circuit is used in external power supply
Charge during access, the power supply circuit is additionally operable to discharge with to the power failure detection circuit and the control when external power supply disconnects
Device processed provides discharge voltage；The power failure detection circuit is used to detect whether external power supply disconnects, and is exported to the controller
Testing result；The controller is used to perform corresponding operation according to the testing result.
Further, the power failure detection circuit includes switching tube, and the first end of the switching tube is used for and external power supply
It is electrically connected, the second end of the switching tube is used to be electrically connected with the power supply circuit, and the output terminal of the switching tube is used for and institute
State controller electrical connection.
Further, the power failure detection circuit further includes first resistor and second resistance, the first end of the switching tube
It is electrically connected by the first resistor with external power supply, the output terminal of the switching tube passes through the second resistance and the control
Device is electrically connected.
Further, the power failure detection circuit further includes the first pull down resistor and the second pull down resistor, under described first
Pull-up resistor is electrically connected between first end and the ground of the switching tube, and second pull down resistor is electrically connected to the second resistance
One end and ground between.
Further, the power supply circuit includes super capacitor, and one end of the super capacitor is used for and the switching tube
Second end and external power supply be electrically connected, the other end of super capacitor ground connection.
Further, the power supply circuit further includes the first capacitance and the second capacitance, first capacitance and described second
Capacitance is electrically connected between one end and ground of the super capacitor.
Further, the power supply circuit further includes diode, and the diode is electrically connected to the one of the super capacitor
Between end and external power supply.
Further, the power supply circuit further includes power supply chip, the input terminal of the power supply chip and the super electricity
One end of appearance is electrically connected, and the output terminal of the power supply chip is electrically connected with the controller.
Further, the power supply circuit further includes the 3rd capacitance and the 4th capacitance, the 3rd capacitance and the described 4th
Capacitance is electrically connected between the output terminal and ground of the power supply chip.
Second aspect, the utility model also propose a kind of gas meter, flow meter, and the gas meter, flow meter includes outage detection control circuit, institute
Stating outage detection control circuit includes power failure detection circuit, power supply circuit and controller, the power failure detection circuit and the confession
Circuit, controller and external power supply are electrically connected, and the power supply circuit is electrically connected with the controller, external power supply；Institute
Power supply circuit is stated to be used to charge in exterior plant-grid connection, the power supply circuit be additionally operable to when external power supply disconnects electric discharge with to
The power failure detection circuit and the controller provide discharge voltage；The power failure detection circuit is used for whether detecting external power supply
Disconnect, the controller is used to controlling the gas meter, flow meter to perform the when the power failure detection circuit detects that external power supply disconnects
One operation, and for controlling the gas meter, flow meter to perform the second behaviour when the power failure detection circuit detects external power supply access
Make.
Compared with the prior art, the utility model has the advantages that：
Outage detection control circuit provided by the utility model includes power failure detection circuit, power supply circuit and controller, institute
State power failure detection circuit to be electrically connected with the power supply circuit, controller and external power supply, the power supply circuit and the control
Device, external power supply are electrically connected.When external power supply accesses, power supply circuit charging, after external power supply disconnects, power supply electricity
Road continues to provide voltage to power failure detection circuit and controller by electric discharge, which detects the backward control of power-off
Device exports corresponding testing result, which carries out gas meter, flow meter according to the testing result and close valve, data service storage, data hair
The operation such as send；After the power failure detection circuit detects that external power supply disconnects access again, controller is according to outage detection electricity
The testing result of road output carries out the operation such as gas meter, flow meter valve opening, data service storage, data sending.
Gas meter, flow meter provided by the utility model includes above-mentioned outage detection control circuit, and the controller is used for described
Power failure detection circuit, which detects, controls the gas meter, flow meter to perform the first operation when external power supply disconnects, for example, closing valve, to combustion
Destiny is according to being stored, being sent out power cut-off information etc., and subsequently into the state of power-off protection, the controller is used for described
Power failure detection circuit controls the gas meter, flow meter to perform the second operation when detecting external power supply access, for example, working as external power supply weight
After new access, gas meter, flow meter will be waken up from resting state at this time, start to work normally, Open valve, the relevant data industry of storage
It is engaged in, is sent out electrifying information etc..
To enable the above-mentioned purpose of the utility model, feature and advantage to become apparent, preferred embodiment cited below particularly, and
Attached drawing appended by cooperation, is described in detail below.
Brief description of the drawings
, below will be to required use in embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment
Attached drawing be briefly described, it will be appreciated that the following drawings illustrate only some embodiments of the utility model, therefore should not be by
Regard the restriction to scope as, for those of ordinary skill in the art, without creative efforts, may be used also
To obtain other relevant attached drawings according to these attached drawings.
Fig. 1 shows the application environment schematic diagram for the gas meter, flow meter that the utility model embodiment is provided.
Fig. 2 shows the connection frame of the outage detection control circuit that the utility model embodiment provided and external power supply
Figure.
Fig. 3 shows the circuit connection diagram for the outage detection control circuit that the utility model embodiment is provided.
Fig. 4 shows that the external power supply that the utility model embodiment is provided is connected with the circuit of outage detection control circuit
Schematic diagram.
Icon：10- gas meter, flow meters；20- external power supplies；30- valves；100- outage detection control circuits；110- outage detections
Circuit；120- power supply circuits；130- controllers.
Embodiment
Below in conjunction with attached drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out clear
Chu, be fully described by, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole realities
Apply example.The component of the utility model embodiment being usually described and illustrated herein in the accompanying drawings can be come with a variety of configurations
Arrangement and design.Therefore, the detailed description of the embodiment of the utility model provided in the accompanying drawings is not intended to limit below
Claimed the scope of the utility model, but it is merely representative of the selected embodiment of the utility model.Based on the utility model
Embodiment, those skilled in the art's all other embodiments obtained on the premise of creative work is not made, all
Belong to the scope of the utility model protection.
It should be noted that：Similar label and letter represents similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined, then it further need not be defined and explained in subsequent attached drawing in a attached drawing.It is meanwhile new in this practicality
In the description of type, term " first ", " second " etc. are only used for distinguishing description, and it is not intended that indicating or implying relatively important
Property.
Fig. 1 is refer to, the application environment schematic diagram of the gas meter, flow meter 10 provided by the utility model embodiment.External power supply
20 are electrically connected with gas meter, flow meter 10, for providing voltage to the gas meter, flow meter 10.The gas meter, flow meter 10 is also connected with a valve 30, for controlling
Closing or the opening of the valve 30 are made, wherein, wired connection or wireless can be used between the gas meter, flow meter 10 and the valve 30
Connection.In the present embodiment, whether the gas meter, flow meter 10 can be used for detecting whether to power off, i.e., break with the external power supply 20
Open, when detecting power-off, maintain a period of time to perform the first operation by internal discharge voltage, carry out power-off protection, example
Such as, sent to the valve 30 and close valve instruction to control the valve 30 to close, be sent out power cut-off information, combustion gas data are deposited
Storage etc..It should be noted that in the present embodiment, external power supply 20 is preferably battery, but is not limited to this.In addition, work as the combustion
Gas meter 10 detects that external power supply 20 (for example, user has replaced battery) realizes electrification reset after accessing again, normally recovers work
Make and perform the second operation, for example, sending valve opening instruction to the valve 30 to control the valve 30 to open, store relevant data
Business, be sent out electrifying information etc..
Fig. 2 is refer to, by the outage detection control circuit 100 that the utility model embodiment provides and external power supply 20
Connect block diagram.In the present embodiment, the outage detection control circuit 100 can be applied in above-mentioned gas meter, flow meter 10, so that combustion
Gas meter 10 can correctly perceive the electric power thus supplied of external power supply 20, and the related measure after processing power-off in time, ensure combustion
The safety switch valve 30 of gas meter 10, and the security performance of data storage.
In the present embodiment, the outage detection control circuit 100 include power failure detection circuit 110, power supply circuit 120 and
Controller 130, the power failure detection circuit 110 are electrically connected with the power supply circuit 120, controller 130 and external power supply 20,
The power supply circuit 120 is electrically connected with the controller 130, external power supply 20.
The power supply circuit 120 is used to charge when external power supply 20 accesses, and the power supply circuit 120 is additionally operable in outside
Discharge when power supply 20 disconnects to provide discharge voltage to the power failure detection circuit 110 and the controller 130.
In the present embodiment, it is also the whole system of gas meter, flow meter 10 while charging energy-storing when external power supply 20 accesses
System power supply.After external power supply 20 disconnects, which just starts to discharge, to the power failure detection circuit 110 and described
Controller 130 provides discharge voltage, and powers as power supply for whole system.
The power failure detection circuit 110 is used to detect whether external power supply 20 disconnects, and exports and examine to the controller 130
Survey result.
The controller 130 is used to perform corresponding operation according to the testing result.Specifically, the controller 130
For controlling the gas meter, flow meter 10 to perform the first operation when the power failure detection circuit 110 detects that external power supply 20 disconnects,
And for controlling the gas meter, flow meter 10 to perform the second behaviour when the power failure detection circuit 110 detects that external power supply 20 accesses
Make.
In the present embodiment, the height electricity for the testing result that the controller 130 can be exported by power failure detection circuit 110
Flat change judges the access situation of external power supply 20.For example, when the testing result is high level, show that external power supply 20 is disconnected
Open, controller 130 controls gas meter, flow meter 10 to perform first operation in the case where power supply circuit 120 is powered at this time, is completing
Gas meter, flow meter 10 enters the state of power-off protection after first operation；When the testing result is low level, show external power supply 20
Again access, gas meter, flow meter 10 will be waken up at this time, and controller 130 controls the gas meter, flow meter 10 to perform second operation.
As shown in figure 3, the circuit connection diagram for the outage detection control circuit 100.In the present embodiment, it is described
The first end that power failure detection circuit 110 includes switching tube Q1, the switching tube Q1 is used to be electrically connected with external power supply 20, described to open
The second end (V_IN) for closing pipe Q1 is used to be electrically connected with the power supply circuit 120, and the output terminal of the switching tube Q1 is used for and institute
Controller 130 is stated to be electrically connected.It should be noted that the switching tube Q1 may be, but not limited to, triode, field-effect tube etc..
In the present embodiment, the switching tube Q1 uses P-channel field-effect transistor (PEFT) pipe, wherein, using the grid of P-channel field-effect transistor (PEFT) pipe as described in
The first end of switching tube Q1, the second end using the source electrode of P-channel field-effect transistor (PEFT) pipe as the switching tube Q1, by P-channel field-effect transistor (PEFT)
Output terminal of the drain electrode of pipe as the switching tube Q1.
In the present embodiment, the power failure detection circuit 110 further includes first resistor R1 and second resistance R2, the switch
The first end of pipe Q1 is electrically connected by the first resistor R1 with external power supply 20, and the output terminal of the switching tube Q1 passes through described
Second resistance R2 is electrically connected with the controller 130.
Further, the power failure detection circuit 110 further includes the first pull down resistor R3 and the second pull down resistor R4, described
First pull down resistor R3 is electrically connected between first end and the ground of the switching tube Q1, and the second pull down resistor R4 is electrically connected to
Between one end and ground of the second resistance R2.In the present embodiment, which is set to avoid the switching tube
The first end (grid) of Q1 is hanging and then disturbs the conducting of switching tube Q1, sets second pull down resistor R4 to can guarantee that input control
The stability of the signal potential of device 130, avoids by-passing signal from producing interference.
In the present embodiment, the power supply circuit 120 includes one end (V_IN) of super capacitor E1, the super capacitor E1
It is electrically connected for the second end and external power supply 20 with the switching tube Q1, the other end ground connection of the super capacitor E1.
Further, the power supply circuit 120 further includes diode D1, the diode D1 and is electrically connected to the super electricity
Hold between one end and the external power supply 20 of E1, anti-reverse protection is realized by the unilateral conduction of diode D1, to avoid electricity
Gas meter, flow meter 10 is caused to damage when source polarity is reversed.
Further, the power supply circuit 120 further include the first capacitance C1 and the second capacitance C2, the first capacitance C1 with
The second capacitance C2 is electrically connected between one end and ground of the super capacitor E1, the first capacitance C1 and the second capacitance C2
There is filtering and voltage stabilizing.
Further, the power supply circuit 120 further includes power supply chip U1, the input terminal of the power supply chip U1 with it is described
One end of super capacitor E1 is electrically connected, and the output terminal of the power supply chip U1 is electrically connected with the controller 130.External power supply 20
After access, its output voltage (for example, being 3.7V) returns super capacitor E1 chargings, power supply core while being power supply chip U1 power supplies
Piece U1 output voltages (for example, 3V) in order to control power by device 130.After external power supply 20 disconnects, super capacitor E1 starts to discharge,
Continue to power to controller 130 and power failure detection circuit 110 as power supply.It is to be appreciated that in the present embodiment, power supply chip
The output voltage of U1 is powered for 10 whole system of gas meter, flow meter, i.e., can also be other moulds in addition to providing voltage to controller 130
Block provides voltage.
Further, the power supply circuit 120 further includes the 3rd capacitance C3 and the 4th capacitance C4, the 3rd capacitance C3 and
The 4th capacitance C4 is electrically connected between the output terminal and ground of the power supply chip U1.In the present embodiment, the described 3rd
Capacitance C3 and the 4th capacitance C4 is used to filter and voltage stabilizing.
As shown in figure 4, by the external power supply 20 that the utility model embodiment provides and outage detection control circuit 100
Circuit connection diagram.The input cathode process of the external power supply 20 can recover fuse F1 respectively with the power failure detection circuit
110th, power supply circuit 120 is electrically connected.In the present embodiment, the fuse F1 that recovers has the function of overcurrent protection.
In the present embodiment, the operation principle of the outage detection control circuit 100 is：When external power supply 20 normally accesses
When, charge for super capacitor E1, while the output voltage of power supply chip U1 is powered for 10 whole system of gas meter, flow meter, gas meter, flow meter 10
In normal operating conditions, the first end (grid) of switching tube Q1 is high level, in cut-off state, the output terminal of switching tube Q1
The POW_OFF signals (i.e. above-mentioned testing result) of (drain electrode) output are low level.After external power supply 20 disconnects, super capacitor E1
Whole system (including power failure detection circuit 110, the controller 130) power supply, the first end of switching tube Q1 are continued as power supply
(grid) is because the disconnection of external power supply 20 is changed into low level so that switching tube Q1 is turned on, the POW_OFF of switching tube Q1 outputs
Signal (i.e. above-mentioned testing result) is high level.The POW_OFF signals that the controller 130 is exported by detection switch pipe Q1 are (i.e.
Above-mentioned testing result) low and high level change, to judge the access situation of external power supply 20.When detecting POW_OFF signals
For high level when, show that external power supply 20 disconnects, the controller 130 is continued by the power supply of the discharge voltage of super capacitor E1 at this time
Work, after making gas meter, flow meter 10 close the operations such as valve 30, storage data, transmission power cut-off information, into the state of power-off protection；When
When detection POW_OFF signals are low level, show that external power supply 20 accesses again, 10 electrification reset of gas meter, flow meter, Open valve 30,
Store relevant data service, be sent out the operation such as electrifying information.
In conclusion outage detection control circuit and gas meter, flow meter that the utility model embodiment provides, the outage detection control
Circuit processed includes power failure detection circuit, power supply circuit and controller, the power failure detection circuit and the power supply circuit, controller
And external power supply is electrically connected, the power supply circuit is electrically connected with the controller, external power supply.When external power supply accesses
When, power supply circuit charging, after external power supply disconnects, which is continued to power failure detection circuit and control by electric discharge
Device provides voltage, which detects that the backward controller of power-off exports corresponding testing result, the controller according to
The testing result carries out gas meter, flow meter and closes the operation such as valve, data service storage, data sending；The power failure detection circuit detects outside
After power supply disconnects access again, controller carries out gas meter, flow meter valve opening, number according to the testing result that the power failure detection circuit exports
Stored according to business, the operation such as data sending.The gas meter, flow meter can correctly perceive the electric power thus supplied of external power supply, and to powering off feelings
Condition takes relevant counter-measure, ensures the safety switch valve of gas meter, flow meter and the security performance of data storage, avoids gas meter, flow meter
Cause that user's gas use cannot be detected in the event of a power failure, and then prestige is caused to the security of the lives and property of user
The side of body.
It should be noted that herein, the relational terms of such as " first " and " second " or the like are used merely to one
A entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operate it
Between there are any actual relationship or order.Moreover, term " comprising ", "comprising" or its any other variant are intended to
Cover non-exclusive inclusion, so that process, method, article or equipment including a series of elements not only include those
Key element, but also including other elements that are not explicitly listed, or further include as this process, method, article or set
Standby intrinsic key element.In the absence of more restrictions, the key element limited by sentence "including a ...", it is not excluded that
Also there are other identical element in the process, method, article or apparatus that includes the element.
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the present invention, for this
For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model
Within, any modification, equivalent replacement, improvement and so on, should be included within the scope of protection of this utility model.It should be noted that
Arrive：Similar label and letter represents similar terms in following attached drawing, therefore, once determined in a certain Xiang Yi attached drawing
Justice, then further need not be defined and explained to it in subsequent attached drawing.
Claims (10)
1. a kind of outage detection control circuit, it is characterised in that the outage detection control circuit includes power failure detection circuit, supplies
Circuit and controller, the power failure detection circuit are electrically connected with the power supply circuit, controller and external power supply, the confession
Circuit is electrically connected with the controller, external power supply；
The power supply circuit is used to charge in exterior plant-grid connection, and the power supply circuit is additionally operable to put when external power supply disconnects
Electricity is with to the power failure detection circuit and controller offer discharge voltage；
The power failure detection circuit is used to detect whether external power supply disconnects, and exports testing result to the controller；
The controller is used to perform corresponding operation according to the testing result.
2. outage detection control circuit as claimed in claim 1, it is characterised in that the power failure detection circuit includes switch
Pipe, the first end of the switching tube are used to be electrically connected with external power supply, and the second end of the switching tube is used for and the power supply electricity
Road is electrically connected, and the output terminal of the switching tube is used to be electrically connected with the controller.
3. outage detection control circuit as claimed in claim 2, it is characterised in that the power failure detection circuit further includes first
Resistance and second resistance, the first end of the switching tube are electrically connected by the first resistor with external power supply, the switching tube
Output terminal be electrically connected by the second resistance with the controller.
4. outage detection control circuit as claimed in claim 3, it is characterised in that the power failure detection circuit further includes first
Pull down resistor and the second pull down resistor, first pull down resistor are electrically connected between first end and the ground of the switching tube, institute
The second pull down resistor is stated to be electrically connected between one end and ground of the second resistance.
5. outage detection control circuit as claimed in claim 2, it is characterised in that the power supply circuit includes super capacitor,
One end of the super capacitor be used for be electrically connected with the second end and external power supply of the switching tube, the super capacitor it is another
End ground connection.
6. outage detection control circuit as claimed in claim 5, it is characterised in that the power supply circuit further includes the first capacitance
And second capacitance, first capacitance and second capacitance are electrically connected between one end and ground of the super capacitor.
7. outage detection control circuit as claimed in claim 5, it is characterised in that the power supply circuit further includes diode,
The diode is electrically connected between one end and the external power supply of the super capacitor.
8. outage detection control circuit as claimed in claim 5, it is characterised in that the power supply circuit further includes power supply core
Piece, the input terminal of the power supply chip are electrically connected with one end of the super capacitor, the output terminal of the power supply chip with it is described
Controller is electrically connected.
9. outage detection control circuit as claimed in claim 8, it is characterised in that the power supply circuit further includes the 3rd capacitance
And the 4th capacitance, the 3rd capacitance and the 4th capacitance are electrically connected between the output terminal and ground of the power supply chip.
10. a kind of gas meter, flow meter, it is characterised in that the gas meter, flow meter includes claim 1-9 any one of them outage detection controls
Circuit processed, the controller are used to control the gas meter, flow meter to perform when the power failure detection circuit detects that external power supply disconnects
First operation, and for controlling the gas meter, flow meter to perform second when the power failure detection circuit detects external power supply access
Operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721195943.XU CN207234519U (en) | 2017-09-18 | 2017-09-18 | Outage detection control circuit and gas meter, flow meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721195943.XU CN207234519U (en) | 2017-09-18 | 2017-09-18 | Outage detection control circuit and gas meter, flow meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207234519U true CN207234519U (en) | 2018-04-13 |
Family
ID=61862691
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721195943.XU Active CN207234519U (en) | 2017-09-18 | 2017-09-18 | Outage detection control circuit and gas meter, flow meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207234519U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109754588A (en) * | 2018-12-28 | 2019-05-14 | 温州职业技术学院 | A kind of wireless data acquisition device |
-
2017
- 2017-09-18 CN CN201721195943.XU patent/CN207234519U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109754588A (en) * | 2018-12-28 | 2019-05-14 | 温州职业技术学院 | A kind of wireless data acquisition device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103928958B (en) | A kind of charging and discharging lithium battery management circuit and lithium battery management system | |
| CN104348233B (en) | Battery protecting circuit and system | |
| CN107306043A (en) | The control method of charging Rouser and the Rouser that charges | |
| CN205544400U (en) | Battery management system of low -power consumption standby | |
| CN105871004B (en) | Power type battery discharge prevention system and its guard method | |
| CN105676054B (en) | Cable reversal connection and short-circuit detecting circuit | |
| CN205050134U (en) | Portable power source TYPE -C interface management circuit | |
| CN110823277B (en) | Equipment anti-dismounting device and equipment with anti-dismounting function | |
| CN109217425A (en) | A kind of charger circuit and its intelligent charge control method | |
| CN103176100B (en) | Method and device for detecting whether storage battery is normally connected in UPS (uninterrupted power supply) or not | |
| CN207234519U (en) | Outage detection control circuit and gas meter, flow meter | |
| CN107634577A (en) | Outage detection control circuit and gas meter, flow meter | |
| CN104333112B (en) | A kind of RTC electric power controller and method | |
| CN207281214U (en) | Type-C interface and connection detection circuit thereof | |
| CN204012767U (en) | A kind of charging and discharging lithium battery management circuit and lithium battery management system | |
| CN103124097A (en) | Intelligent lithium ion charger | |
| CN205509601U (en) | Power type battery discharge protection system | |
| CN105091502A (en) | Power failure prompt device and refrigerator | |
| CN204389654U (en) | Based on the battery electric quantity detection system that cell resistance is followed the tracks of | |
| CN204967367U (en) | Notebook computer battery protection circuit | |
| CN104897951B (en) | A kind of warning device and method | |
| CN209560016U (en) | A kind of DC power supply plate connector detection system | |
| CN204426703U (en) | Electronic cigarette control chip and electronic cigarette | |
| CN207664703U (en) | A kind of standby power alarm power supply circuit | |
| CN206922502U (en) | Power-down protection control circuit and electronic equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |