CN207232337U - Relay on-off state detection circuit and electric energy meter - Google Patents
Relay on-off state detection circuit and electric energy meter Download PDFInfo
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- CN207232337U CN207232337U CN201721287542.7U CN201721287542U CN207232337U CN 207232337 U CN207232337 U CN 207232337U CN 201721287542 U CN201721287542 U CN 201721287542U CN 207232337 U CN207232337 U CN 207232337U
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Abstract
The utility model provides a kind of relay on-off state detection circuit and electric energy meter, wherein the detection circuit includes：Detection terminal, the voltage signal that the voltage input-terminal for receiving external relay produces after being connected with normally closed terminal；Divider resistance, for carrying out partial pressure to voltage signal；Triode, for the high level signal under the control of the output signal of divider resistance, exported by pull-up node on or off pull-up resistor, and, when closing the high level signal of pull-up resistor output, low level signal is exported to processor；Pull-up resistor, for responding the control of pull-up node, high level signal is exported to processor；Processor, for determining the on off operating mode of external relay according to high level signal or low level signal, the detection circuit can be detected the actual switch state of external relay, avoid due to the security incident that operating personnel can not obtain the actual switch state of external relay and trigger.
Description
Technical field
The utility model is related to electronic instrument technical field, more particularly, to a kind of relay on-off state detection circuit and
Electric energy meter.
Background technology
At present, the external relay control mode of conventional electric energy meter be passive signal control, electric energy meter only for it is external after
Electric appliance provides switching signal, needs external cabling to input 220V voltages from the external voltage input terminal of electric energy meter in actual use
Signal, after electric energy meter receives voltage signal, just sends closure signal to external relay, is closed so that external relay is in
Conjunction state；When electric energy meter does not receive voltage signal, external relay is just off.When electric energy meter is to external relay
After device sends switching signal, external relay is failure to actuate, or carries out opposite action, in this case, due to operator
Member can not obtain the actual switch state of external relay, may trigger security incident.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of relay on-off state detection circuit and electric energy meter,
Existing in the prior art trigger peace since operating personnel can not obtain the actual switch state of external relay to solve
The technical problem of full accident.
In a first aspect, the utility model embodiment provides a kind of relay on-off state detection circuit, including：Test side
Son, divider resistance, triode, pull-up resistor and processor；
The detection terminal, the electricity that the voltage input-terminal for receiving external relay produces after being connected with normally closed terminal
Press signal；
The divider resistance, for carrying out partial pressure to the voltage signal；
The triode, for the divider resistance output signal control under, by pull-up node connect or
The high level signal of the pull-up resistor output is closed, and, when closing the high level signal of the pull-up resistor output, to
The processor exports low level signal；
The pull-up resistor, for responding the control of the pull-up node, high level signal is exported to the processor；
The processor, for determining the logical of the external relay according to the high level signal or low level signal
Disconnected state.
With reference to first aspect, the utility model embodiment provides the first possible embodiment of first aspect, its
In, the circuit further includes：Built-in relay；
The normally closed terminal of the built-in relay is connected with the input terminal of the external relay, for when it is described it is built-in after
After the voltage input-terminal of electric appliance is connected with the normally closed terminal of the built-in relay, the electricity is exported to the external relay
Press signal.
With reference to first aspect, the utility model embodiment provides second of possible embodiment of first aspect, its
In, the base stage of the triode is connected with the output terminal of the divider resistance, the source electrode earthing power supply voltage of the triode, institute
The grid for stating triode is connected with the pull-up node.
With reference to first aspect, the utility model embodiment provides the third possible embodiment of first aspect, its
In, the circuit further includes filter module, and the filter module includes filter resistance and the first filter capacitor；
The input terminal of the filter resistance is connected with the output terminal of the divider resistance, the output termination of the filter resistance
Ground supply voltage；
The input terminal of first filter capacitor is connected with the output terminal of the divider resistance, first filter capacitor
Output head grounding supply voltage.
With reference to first aspect, the utility model embodiment provides the 4th kind of possible embodiment of first aspect, its
In, the circuit further includes：First diode and the second diode；
The cathode of first diode is connected with the source electrode of the triode, the anode of first diode with it is described
The base stage connection of triode；
The cathode of second diode is connected with the pull-up node, the anode of second diode and three pole
The grid connection of pipe.
With reference to first aspect, the utility model embodiment provides the 5th kind of possible embodiment of first aspect, its
In, the circuit further includes：Second filter capacitor；
The input terminal of second filter capacitor is connected with the output terminal of the processor, second filter capacitor it is defeated
Outlet earthing power supply voltage.
With reference to first aspect, the utility model embodiment provides the 6th kind of possible embodiment of first aspect, its
In, the circuit further includes：First current-limiting resistance；
The input terminal of first current-limiting resistance is connected with the pull-up node, the output terminal of first current-limiting resistance with
The input terminal connection of the processor, first current-limiting resistance are used to protect the processor.
With reference to first aspect, the utility model embodiment provides the 7th kind of possible embodiment of first aspect, its
In, the circuit further includes：Rectification module, the rectification module include with the connection terminal of three-phase alternating-current supply being connected respectively
Three rectification branches, each rectification branch includes at least one rectifier diode.
With reference to first aspect, the utility model embodiment provides the 8th kind of possible embodiment of first aspect, its
In, the circuit further includes：Second current-limiting resistance；
The input terminal of second current-limiting resistance is connected with the output terminal of three rectification branches, the second current limliting electricity
The input terminal of the output terminal of resistance and the built-in relay (07) of electric energy meter connects.
Second aspect, the utility model embodiment additionally provide a kind of electric energy meter, including such as any one of above-mentioned first aspect
The relay on-off state detection circuit.
The utility model embodiment brings following beneficial effect：The relay on-off shape that the utility model embodiment provides
State detection circuit, including：Detection terminal, divider resistance, triode, pull-up resistor and processor；The detection terminal, for connecing
Receive the external relay and connect after the normally opened contact voltage signal produced；The divider resistance, for the voltage
Signal carries out partial pressure；The triode, under the control of the output signal of the divider resistance, being connected by pull-up node
Or the high level signal of the pull-up resistor output is closed, and, closing the high level signal of the pull-up resistor output
When, export low level signal to the processor；The pull-up resistor, for responding the control of the pull-up node, to described
Processor exports high level signal；The processor, described in being determined according to the high level signal or low level signal
The on off operating mode of external relay.
The utility model embodiment first with divider resistance to the voltage signal that the external relay of electric energy meter produces into
Row partial pressure, it is then defeated by pull-up node on or off pull-up resistor using the output signal control triode of divider resistance
The high level signal gone out, when closing the high level signal of the pull-up resistor output, the triode is defeated to the processor
Go out low level signal, when connecting the pull-up resistor, the pull-up resistor exports high level signal to the processor, finally
Determine that the external relay is off according to the high level signal received by processor, processor is according to reception
To low level signal determine that the external relay is in closure state.The detection circuit that the utility model embodiment provides can
It is detected, is effectively avoided since operating personnel can not obtain with the actual switch state of the external relay to electric energy meter
The actual switch state of external relay and the security incident triggered.
Other feature and advantage of the utility model will illustrate in the following description, also, partly from specification
In become apparent, or understood by implementing the utility model.The purpose of this utility model and other advantages are illustrating
Specifically noted structure is realized and obtained in book, claims and attached drawing.
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 right in order to illustrate more clearly of the utility model embodiment or technical solution of the prior art
Embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, describe below
In attached drawing be the utility model some embodiments, for those of ordinary skill in the art, do not paying creativeness
On the premise of work, other attached drawings can also be obtained according to these attached drawings.
Fig. 1 is a kind of relay on-off state detection circuit that the utility model embodiment provides；
Fig. 2 is another relay on-off state detection circuit that the utility model embodiment provides；
Fig. 3 is another relay on-off state detection circuit that the utility model embodiment provides；
Fig. 4 is another relay on-off state detection circuit that the utility model embodiment provides；
Fig. 5 is another relay on-off state detection circuit that the utility model embodiment provides；
Fig. 6 is another relay on-off state detection circuit that the utility model embodiment provides.
Embodiment
To make the purpose, technical scheme and advantage of the utility model embodiment clearer, below in conjunction with attached drawing to this
The technical solution of utility model is clearly and completely described, it is clear that described embodiment is that the utility model part is real
Example is applied, instead of all the embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making
All other embodiments obtained under the premise of creative work, shall fall within the protection scope of the present invention.
After electric energy meter sends switching signal to external relay, external relay is failure to actuate, or carries out opposite move
Make, in this case, since operating personnel can not obtain the actual switch state of external relay, safe thing may be triggered
Therefore based on this, a kind of the relay on-off state detection circuit and electric energy meter that the utility model embodiment provides can be to external
The actual on off operating mode of relay is detected.
For the ease of understanding the present embodiment, a kind of relay disclosed in the utility model embodiment is led to first
Disconnected state detection circuit describes in detail, and Fig. 1 is a kind of external relay on off operating mode that the utility model embodiment provides
Detection circuit, as shown in Figure 1, the circuit includes：Detection terminal (01), divider resistance (02), triode (03), pull-up resistor
(04) and processor (05)；
Detection terminal (01), for receiving the voltage input-terminal (061) and normally closed terminal (062) of external relay (06)
The voltage signal produced after connection；
Being connected when the voltage input-terminal (061) of external relay (06) with normally opened terminal (063) makes, external relay
(06) it is off, detection terminal (01) does not receive voltage signal.
Divider resistance (02), for carrying out partial pressure to the voltage signal；
Triode (03), for divider resistance (02) output signal control under, by pull-up node connect or
The high level signal of the pull-up resistor output is closed, and, when closing the high level signal of the pull-up resistor output, to
Processor (05) exports low level signal；
Pull-up resistor (04), for responding the control of the pull-up node, high level signal is exported to processor (05)；
Processor (05), for determining the logical of external relay (06) according to the high level signal or low level signal
Disconnected state.
Specifically, the base stage of triode (03) is connected with the output terminal of divider resistance (02), the source electrode of triode (03) connects
Ground supply voltage, the grid of triode (03) are connected with the pull-up node.
Specifically, after the voltage input-terminal (061) of external relay (06) is connected with normally closed terminal (062), detection
Terminal (01) receives the voltage signal of external relay (06) output, which passes through divider resistance (02) partial pressure, and three
Pole pipe under the control of the output signal of divider resistance, believe by the high level that pull-up resistor (04) output is closed by pull-up node
Number, and low level signal is exported to processor (05), processor (05) determines external relay according to the low level signal received
Device (06) is in closure state；When the voltage input-terminal (061) of external relay (06) is connected with normally opened terminal (063),
Triode (03) connects the high level signal that pull-up resistor (04) exports by pull-up node, and pull-up resistor (04) is to processor
(05) high level signal is exported, processor (05) determines that external relay (06) is according to the high level signal received and disconnects
State.
The relay on-off state detection circuit that the utility model embodiment provides further includes：Built-in relay (07)；
The normally closed terminal (071) of built-in relay (07) is connected with the input terminal of the external relay (06), for working as
The voltage input-terminal (071) of the built-in relay (07) is connected with the normally closed terminal (072) of the built-in relay (07)
Afterwards, the voltage signal is exported to the external relay (06).
Specifically, when opposite built-in relay (07) power supply of three phase mains at least one, the electricity of built-in relay (07)
Pressure input terminal (071) is connected with the normally closed terminal (072) of built-in relay (07), and built-in relay (07) is in closed form
State, and voltage signal is exported to external relay (06) so that the voltage input-terminal (061) of external relay (06) with it is outer
Normally closed terminal (062) connection of relay (06) is put, external relay is in closure state；It is interior when the equal phase shortage of three phase mains
Put the voltage input-terminal (071) of relay (07) to be connected with the normally opened terminal (073) of built-in relay (07), built-in relay
(07) it is off, external relay (06) does not receive voltage signal, the voltage input-terminal of external relay (06)
(061) it is connected with the normally opened terminal (063) of external relay (06), external relay (06) is off.
The relay on-off state detection circuit that the utility model embodiment provides further includes：Rectification module (13), rectification
Module (13) includes three rectification branches being connected respectively with the connection terminal of three-phase alternating-current supply, each rectification branch
Include at least one rectifier diode (130).
It is exemplary, when the A phase power supply not phase shortages in three-phase alternating-current supply, the supply voltages of A phases by with A phase power supplys
After rectifier diode (130) rectification processing in the rectification branch that connection terminal is connected, input to built-in relay (07), it is interior
Put the voltage input-terminal (071) of relay (07) to be connected with the normally closed terminal (072) of built-in relay (07), built-in relay
(07) closure state is in, and voltage signal is exported to external relay (06), so that the voltage of external relay (06) is defeated
Enter terminal (061) to be connected with the normally closed terminal (062) of external relay (06), external relay is in closure state.
When the A phases in three-phase alternating-current supply and B phase power supply not phase shortages, the supply voltage of A phases with A phase power supplys by being connected
Rectifier diode (130) rectification processing in the rectification branch that terminal is connected, the supply voltage of B phases with B phases power supply by connecting
After rectifier diode (130) rectification processing in the rectification branch that connecting terminal is connected, input to built-in relay (07), it is built-in
The voltage input-terminal (071) of relay (07) is connected with the normally closed terminal (072) of built-in relay (07), built-in relay
(07) closure state is in, and voltage signal is exported to external relay (06), so that the voltage of external relay (06) is defeated
Enter terminal (061) to be connected with the normally closed terminal (062) of external relay (06), external relay is in closure state.
When the A phases in three-phase alternating-current supply, B phases and C phase power supply not phase shortages, the supply voltages of A phases by with A phase power supplys
Rectifier diode (130) rectification in the rectification branch that connection terminal is connected is handled, and the supply voltage of B phases passes through and B phases electricity
Rectifier diode (130) rectification processing in the rectification branch that source connection is connected, the supply voltages of C phases by with C phases
After rectifier diode (130) rectification processing in the rectification branch that power connector end is connected, input to built-in relay
(07), the voltage input-terminal (071) of built-in relay (07) is connected with the normally closed terminal (072) of built-in relay (07), interior
Put relay (07) and be in closure state, and voltage signal is exported to external relay (06), so that external relay (06)
Voltage input-terminal (061) be connected with the normally closed terminal (062) of external relay (06), external relay is in closed form
State.
Fig. 2 provides another relay on-off state detection circuit for the utility model embodiment, as shown in Fig. 2,
On the basis of above-described embodiment, which further includes filter module (08), filter module (08) bag
Include filter resistance (081) and the first filter capacitor (082)；
The input terminal of filter resistance (081) is connected with the output terminal of divider resistance (02), the output terminal of filter resistance (081)
Earthing power supply voltage；
The input terminal of first filter capacitor (082) is connected with the output terminal of divider resistance (02), the first filter capacitor (082)
Output head grounding supply voltage.
Fig. 3 is another relay on-off state detection circuit that the utility model embodiment provides, as shown in figure 3,
On the basis of above-described embodiment, which further includes：First diode (09) and the second diode (10)；
The cathode of first diode (09) is connected with the source electrode of triode (03), the anode of the first diode (09) and three poles
Manage the base stage connection of (03)；
The cathode of second diode (10) is connected with the pull-up node, the anode and triode of the second diode (10)
(03) grid connection.
Specifically, the first diode (09) and the second diode (10) are used to include triode (03), triode is prevented
(03) it is reversed voltage breakdown.
Fig. 4 is another relay on-off state detection circuit that the utility model embodiment provides, as shown in figure 4,
On the basis of above-described embodiment, which further includes：Second filter capacitor (11)；
The input terminal of second filter capacitor (11) is connected with the output terminal of processor (05), the second filter capacitor (11) it is defeated
Outlet earthing power supply voltage.
Fig. 5 is another relay on-off state detection circuit that the utility model embodiment provides, as shown in figure 5,
On the basis of above-described embodiment, which further includes：First current-limiting resistance (12)；
The input terminal of first current-limiting resistance (12) is connected with the pull-up node, the output terminal of the first current-limiting resistance (12) with
The input terminal connection of processor (05), the first current-limiting resistance (12) are used to protect processor (05).
Fig. 6 is another relay on-off state detection circuit that the utility model embodiment provides, as shown in fig. 6,
On the basis of above-described embodiment, which further includes：Second current-limiting resistance (14)；
The input terminal of second current-limiting resistance (14) is connected with the output terminal of three rectification branches, the second current-limiting resistance
(14) output terminal and the input terminal of the built-in relay (07) of electric energy meter connects.
The utility model embodiment additionally provides a kind of electric energy meter, which is included as described in any one of above-described embodiment
Relay on-off state detection circuit.
The utility model embodiment first with divider resistance to the voltage signal that the external relay of electric energy meter produces into
Row partial pressure, it is then defeated by pull-up node on or off pull-up resistor using the output signal control triode of divider resistance
The high level signal gone out, when closing the high level signal of the pull-up resistor output, the triode is defeated to the processor
Go out low level signal, when connecting the pull-up resistor, the pull-up resistor exports high level signal to the processor, finally
Determine that the external relay is off according to the high level signal received by processor, processor is according to reception
To low level signal determine that the external relay is in closure state.The detection circuit that the utility model embodiment provides can
It is detected, is effectively avoided since operating personnel can not obtain with the actual switch state of the external relay to electric energy meter
The actual switch state of external relay and the security incident triggered.
In addition, in the description of the utility model embodiment, unless otherwise clearly defined and limited, term " installation ",
" connected ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or integratedly be connected
Connect；Can mechanically connect or be electrically connected；It can be directly connected, can also be indirectly connected by intermediary, can
To be the connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood with concrete condition
Concrete meaning in the utility model.
, it is necessary to explanation in the description of the utility model, term " " center ", " on ", " under ", it is "left", "right", " perpendicular
Directly ", the orientation of the instruction such as " level ", " interior ", " outer " or position relationship are based on orientation shown in the drawings or position relationship, are only
Described for the ease of description the utility model and simplifying, rather than instruction or imply signified device or element must have it is specific
Orientation, with specific azimuth configuration and operation, therefore it is not intended that limitation to the utility model.In addition, term " the
One ", " second ", " the 3rd " are only used for description purpose, and it is not intended that instruction or hint relative importance.
In several embodiments provided herein, it should be understood that disclosed device, can be by others side
Formula is realized.Device embodiment described above is only schematical, for example, the division of the unit, is only that one kind is patrolled
Function division is collected, there can be other dividing mode when actually realizing, in another example, multiple units or component can combine or can
To be integrated into another system, or some features can be ignored, or not perform.Another, shown or discussed is mutual
Coupling, direct-coupling or communication connection can be INDIRECT COUPLING or communication link by some communication interfaces, device or unit
Connect, can be electrical, machinery or other forms.
The unit illustrated as separating component may or may not be physically separate, be shown as unit
The component shown may or may not be physical location, you can with positioned at a place, or can also be distributed to multiple
In network unit.Some or all of unit therein can be selected to realize the mesh of this embodiment scheme according to the actual needs
's.
In addition, each functional unit in each embodiment of the utility model can be integrated in a processing unit,
Can be that unit is individually physically present, can also two or more units integrate in a unit.
If the function is realized in the form of SFU software functional unit and is used as independent production marketing or in use, can be with
It is stored in the non-volatile computer read/write memory medium that a processor can perform.Based on such understanding, this practicality
The part or the part of the technical solution that new technical solution substantially in other words contributes the prior art can be with
The form of software product embodies, which is stored in a storage medium, including some instructions to
So that computer equipment (can be personal computer, server, or network equipment an etc.) execution the utility model is each
The all or part of step of embodiment the method.And foregoing storage medium includes：USB flash disk, mobile hard disk, read-only storage
(ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disc or CD
Etc. it is various can be with the medium of store program codes.
Finally it should be noted that：Embodiment described above, is only specific embodiment of the present utility model, to illustrate this
The technical solution of utility model, rather than its limitations, the scope of protection of the utility model is not limited thereto, although with reference to foregoing
The utility model is described in detail in embodiment, it will be understood by those of ordinary skill in the art that：It is any to be familiar with this skill
For the technical staff in art field in the technical scope that the utility model discloses, it still can be to the skill described in previous embodiment
Art scheme is modified or can readily occur in change, or carries out equivalent substitution to which part technical characteristic；And these modifications,
Change is replaced, and the essence of appropriate technical solution is departed from the spirit and model of the utility model embodiment technical solution
Enclose, should be covered within the scope of the utility model.Therefore, the scope of protection of the utility model described should be wanted with right
Subject to the protection domain asked.
Claims (10)
- A kind of 1. relay on-off state detection circuit, it is characterised in that including：Detection terminal (01), divider resistance (02), three Pole pipe (03), pull-up resistor (04) and processor (05)；The detection terminal (01), for receiving the voltage input-terminal (061) and normally closed terminal (062) of external relay (06) The voltage signal produced after connection；The divider resistance (02), for carrying out partial pressure to the voltage signal；The triode (03), under the control of the output signal of the divider resistance (02), being connected by pull-up node Or the high level signal of the pull-up resistor output is closed, and, closing the high level signal of the pull-up resistor output When, export low level signal to the processor (05)；The pull-up resistor (04), for responding the control of the pull-up node, to the processor (05) output high level letter Number；The processor (05), for determining the external relay (06) according to the high level signal or low level signal On off operating mode.
- 2. relay on-off state detection circuit according to claim 1, it is characterised in that further include：Built-in relay (07)；The normally closed terminal (072) of the built-in relay (07) is connected with the input terminal of the external relay (06), for working as The voltage input-terminal (071) of the built-in relay (07) is connected with the normally closed terminal (072) of the built-in relay (07) Afterwards, the voltage signal is exported to the external relay (06).
- 3. relay on-off state detection circuit according to claim 1, it is characterised in that the base of the triode (03) Pole is connected with the output terminal of the divider resistance (02), the source electrode earthing power supply voltage of the triode (03), the triode (03) grid is connected with the pull-up node.
- 4. relay on-off state detection circuit according to claim 1, it is characterised in that further include filter module (08), the filter module (08) includes filter resistance (081) and the first filter capacitor (082)；The input terminal of the filter resistance (081) is connected with the output terminal of the divider resistance (02), the filter resistance (081) Output head grounding supply voltage；The input terminal of first filter capacitor (082) is connected with the output terminal of the divider resistance (02), first filtering The output head grounding supply voltage of capacitance (082).
- 5. relay on-off state detection circuit according to claim 2, it is characterised in that further include：First diode (09) and the second diode (10)；The cathode of first diode (09) is connected with the source electrode of the triode (03), and first diode (09) is born Pole is connected with the base stage of the triode (03)；The cathode of second diode (10) is connected with the pull-up node, the anode of second diode (10) with it is described The grid connection of triode (03).
- 6. relay on-off state detection circuit according to claim 1, it is characterised in that further include：Second filtered electrical Hold (11)；The input terminal of second filter capacitor (11) is connected with the output terminal of the processor (05), second filter capacitor (11) output head grounding supply voltage.
- 7. relay on-off state detection circuit according to claim 1, it is characterised in that further include：First current limliting electricity Hinder (12)；The input terminal of first current-limiting resistance (12) is connected with the pull-up node, the output of first current-limiting resistance (12) End is connected with the input terminal of the processor (05), and first current-limiting resistance (12) is used to protect the processor (05).
- 8. relay on-off state detection circuit according to claim 1, it is characterised in that further include：Rectification module (13), the rectification module (13) includes three rectification branches being connected respectively with the connection terminal of three-phase alternating-current supply, often A rectification branch includes at least one rectifier diode (130).
- 9. relay on-off state detection circuit according to claim 8, it is characterised in that further include：Second current limliting electricity Hinder (14)；The input terminal of second current-limiting resistance (14) is connected with the output terminal of three rectification branches, the second current limliting electricity The input terminal for hindering the output terminal of (14) and the built-in relay (07) of electric energy meter connects.
- 10. a kind of electric energy meter, it is characterised in that including such as claim 1-9 any one of them relay on-off state-detection Circuit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721287542.7U CN207232337U (en) | 2017-09-30 | 2017-09-30 | Relay on-off state detection circuit and electric energy meter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721287542.7U CN207232337U (en) | 2017-09-30 | 2017-09-30 | Relay on-off state detection circuit and electric energy meter |
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| CN207232337U true CN207232337U (en) | 2018-04-13 |
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Cited By (5)
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| CN109001622A (en) * | 2018-08-01 | 2018-12-14 | 宁波三星智能电气有限公司 | A kind of detection method of the external on-load switch of electric energy meter |
| CN111257949A (en) * | 2020-02-25 | 2020-06-09 | 深圳拓邦股份有限公司 | Contact terminal contact detection control circuit and electrical apparatus |
| CN111736000A (en) * | 2019-03-25 | 2020-10-02 | 萨基姆通讯能源及电信联合股份公司 | Electric meter comprising a circuit for detecting the open or closed state of a circuit breaker |
| CN114123152A (en) * | 2021-11-18 | 2022-03-01 | 智道网联科技(北京)有限公司 | Input/output circuit, electronic device, and vehicle |
| CN116709613A (en) * | 2023-05-24 | 2023-09-05 | 日炀(东莞)电子科技有限公司 | Engineering construction equipment and electronic circuit |
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2017
- 2017-09-30 CN CN201721287542.7U patent/CN207232337U/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109001622A (en) * | 2018-08-01 | 2018-12-14 | 宁波三星智能电气有限公司 | A kind of detection method of the external on-load switch of electric energy meter |
| CN109001622B (en) * | 2018-08-01 | 2020-10-27 | 宁波三星智能电气有限公司 | Detection method for external load switch of electric energy meter |
| CN111736000A (en) * | 2019-03-25 | 2020-10-02 | 萨基姆通讯能源及电信联合股份公司 | Electric meter comprising a circuit for detecting the open or closed state of a circuit breaker |
| CN111257949A (en) * | 2020-02-25 | 2020-06-09 | 深圳拓邦股份有限公司 | Contact terminal contact detection control circuit and electrical apparatus |
| CN114123152A (en) * | 2021-11-18 | 2022-03-01 | 智道网联科技(北京)有限公司 | Input/output circuit, electronic device, and vehicle |
| CN114123152B (en) * | 2021-11-18 | 2025-02-07 | 智道网联科技(北京)有限公司 | Input-output circuits, electronic devices, and vehicles |
| CN116709613A (en) * | 2023-05-24 | 2023-09-05 | 日炀(东莞)电子科技有限公司 | Engineering construction equipment and electronic circuit |
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