CN211576271U - Battery current supply instrument with internal and external power supply switching function - Google Patents
Battery current supply instrument with internal and external power supply switching function Download PDFInfo
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- CN211576271U CN211576271U CN202020385311.5U CN202020385311U CN211576271U CN 211576271 U CN211576271 U CN 211576271U CN 202020385311 U CN202020385311 U CN 202020385311U CN 211576271 U CN211576271 U CN 211576271U
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Abstract
The utility model discloses a battery power supply current magnitude instrument of in-band external power source switching function, including power and microprocessor, microprocessor's outside port is connected with flow signal processing unit, liquid crystal display, magneto-sensitive button, photoelectric interface, pulse output interface, 485 communication interface and data storage unit. The power supply comprises an external power supply and an internal power supply, the external power supply and the internal power supply are switched through the power supply switching module, and when the external power supply does not exist, the power supply switching module selects an internal power supply mode; when connecing external power source, the power switching module selects the outside power supply mode, reduces internal power source's electric quantity consumption, the utility model discloses increase inside and outside power source and switch the function, prolong flow meter's operating time, especially when battery power is not enough for flow meter power supply, can provide the power supply by the outside, prolong battery current supply meter's life.
Description
Technical Field
The utility model relates to a flow instrument power supply technical field especially relates to a battery power supply flow instrument of in-band external power source switching function.
Background
The flow meter is widely applied to industries such as water supply and drainage, petroleum, steel, chemical industry, electric power, papermaking, metallurgy, medicine, food and the like, and is an indispensable modern flow meter in the fields of industrial production, trade settlement, environmental protection and the like.
The flow meter is an intelligent meter, the power supply of the flow meter is very important, and the working stability and the service life of the flow meter can be influenced by the power supply mode of the flow meter. The field use environment of the flow meter is complex, particularly for the flow meter powered by a battery, when the electric quantity of the battery is consumed, the flow meter can be stopped, so that data loss is caused, and the battery cannot be replaced due to the limitation of the field condition and the structure of the flow meter.
So the utility model provides a new scheme to solve the problem.
SUMMERY OF THE UTILITY MODEL
To overcome the above problems, an object of the present invention is to provide a battery power supply flow meter with an internal and external power switching function.
The technical scheme for solving the problem is as follows: a battery current supply instrument with an internal and external power supply switching function comprises a power supply and a microprocessor, wherein an external port of the microprocessor is connected with a flow signal processing unit, a liquid crystal display screen, a magnetic sensitive key, a photoelectric interface, a pulse output interface, a 485 communication interface and a data storage unit; when the external power supply is connected, the power supply switching module selects an external power supply mode.
Further, the power supply switching module comprises connection terminals J1, J2 and J3, wherein a connection terminal J1 is connected with the external power supply, a connection terminal J2 is connected with the internal power supply, and a connection terminal J3 is used for a power supply end of the flow meter.
Furthermore, pin 1 of the connection terminal J1 is grounded, pin 2 of the connection terminal J1 is connected to one end of the resistor R1, the anode of the diode D1 and the gate of the MOS transistor Q1, pin 1 of the connection terminal J2 is connected to the drain of the MOS transistor Q1, pin 2 of the connection terminal J2 is grounded, the source of the MOS transistor Q1 and the cathode of the diode D1 are connected to pin 1 of the connection terminal J3, and pin 2 of the connection terminal J3 is grounded.
Furthermore, the external power supply and the internal power supply both adopt +3.6V direct current power supplies.
Through the technical scheme, the beneficial effects of the utility model are that: the utility model relates to a battery power supply flow meter of in-band external power source switching function increases the internal and external power source switching function, prolongs the operating time of flow meter, especially when battery power is not enough for the flow meter power supply, can provide the power supply by the outside, prolongs the life of battery power supply flow meter.
Drawings
Fig. 1 is a block diagram of the present invention.
Fig. 2 is a schematic diagram of the system structure of the present invention.
Fig. 3 is a schematic structural diagram of the connection terminal of the present invention.
Fig. 4 is a schematic circuit diagram of the power switching module of the present invention.
In the figure: 1-microprocessor, 2-flow signal processing unit, 3-liquid crystal display screen, 4-magnetic sensitive key, 5-photoelectric interface, 6-pulse output interface, 7-485 communication interface, 8-data storage unit, 9-external power supply, and 10-internal power supply.
Detailed Description
The foregoing and other technical matters, features and effects of the present invention will be apparent from the following detailed description of the embodiments, which is to be read in connection with the accompanying drawings of fig. 1 to 4. The structural contents mentioned in the following embodiments are all referred to the attached drawings of the specification.
Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.
As shown in fig. 1, a battery-powered current measuring instrument with an internal and external power switching function comprises a power supply and a microprocessor 1, wherein an external port of the microprocessor 1 is connected with a flow signal processing unit 2, a liquid crystal display screen 3, a magnetic-sensing key 4, a photoelectric interface 5, a pulse output interface 6, a 485 communication interface 7 and a data storage unit 8.
As shown in fig. 2, the power supply includes an external power supply 9 and an internal power supply 10, the external power supply 9 and the internal power supply 10 are switched by a power supply switching module, and when there is no external power supply 9, the power supply switching module selects an internal power supply mode; when the external power supply 9 is connected, the power supply switching module selects an external power supply mode, and the electric quantity consumption of the internal power supply is reduced. In the specific setting, the external power supply 9 and the internal power supply 10 both adopt +3.6V direct current power supplies.
As shown in fig. 3, the power switching module is an independent module, which is convenient to disassemble, assemble and replace, and specifically includes a connection terminal J1, J2, J3, a connection terminal J1 is connected with an external power supply, a connection terminal J2 is connected with an internal power supply, and a connection terminal J3 is used for a power supply terminal of the flow meter to supply power to each module of the flow meter.
As shown in fig. 4, pin 1 of the connection terminal J1 is grounded, pin 2 of the connection terminal J1 is connected to one end of the resistor R1, the anode of the diode D1 and the gate of the MOS transistor Q1, pin 1 of the connection terminal J2 is connected to the drain of the MOS transistor Q1, pin 2 of the connection terminal J2 is grounded, the source of the MOS transistor Q1 and the cathode of the diode D1 are connected to pin 1 of the connection terminal J3, and pin 2 of the connection terminal J3 is grounded, wherein the MOS transistor Q1 is a P-type MOS transistor.
The utility model discloses a theory of operation does: when the external power supply 9 is not available, namely the connection terminal J1 is not powered on, the gate of the MOS transistor Q1 is at a low level, the drain of the MOS transistor Q1 is at a high level, and thus the internal power supply 10 directly provides power for the connection terminal J3, and the power supply switching module selects an internal power supply mode; when the external power supply 9 is connected, namely the connection terminal J1 is powered on, the gate and drain voltages of the MOS transistor Q1 are equal, so that the MOS transistor Q1 is cut off, the power supply of the internal power supply 10 is cut off, the diode D1 of the external power supply 9 supplies power to the connection terminal J3, the power supply switching module selects an external power supply mode, and the power consumption of the internal power supply 10 is greatly reduced.
To sum up, the utility model relates to a battery power supply volume instrument of inside and outside power supply switching function in area increases inside and outside power supply switching function, prolongs the operating time of flow instrument, especially when battery power is not enough for the flow instrument power supply, can provide the power supply by the outside, prolongs the life of battery power supply volume instrument.
The above description is provided for further details of the present invention with reference to the specific embodiments, which should not be construed as limiting the present invention; to the utility model discloses affiliated and relevant technical field's technical personnel are based on the utility model discloses under the technical scheme thinking prerequisite, the extension of doing and the replacement of operating method, data all should fall within the utility model discloses within the protection scope.
Claims (4)
1. The utility model provides a battery power supply volume instrument of function is switched to inside and outside power in area, includes power and microprocessor (1), the outside port of microprocessor (1) is connected with flow signal processing unit (2), liquid crystal display (3), magnetism sensing button (4), photoelectricity interface (5), pulse output interface (6), 485 communication interface (7) and data storage unit (8), its characterized in that: the power supply comprises an external power supply (9) and an internal power supply (10), the external power supply (9) and the internal power supply (10) are switched through a power supply switching module, and when the external power supply (9) does not exist, the power supply switching module selects an internal power supply mode; when the external power supply (9) is connected, the power supply switching module selects an external power supply mode.
2. The battery-powered amperage meter of claim 1, wherein: the power supply switching module comprises connecting terminals J1, J2 and J3, wherein the connecting terminal J1 is connected with the external power supply (9), the connecting terminal J2 is connected with the internal power supply (10), and the connecting terminal J3 is used for a power supply end of the flow meter.
3. The battery-powered amperage meter of claim 2, wherein: pin 1 of the connection terminal J1 is grounded, pin 2 of the connection terminal J1 is connected with one end of the resistor R1, the anode of the diode D1 and the gate of the MOS transistor Q1, pin 1 of the connection terminal J2 is connected with the drain of the MOS transistor Q1, pin 2 of the connection terminal J2 is grounded, the source of the MOS transistor Q1 and the cathode of the diode D1 are connected with pin 1 of the connection terminal J3, and pin 2 of the connection terminal J3 is grounded.
4. A battery-powered electricity flow meter according to any of claims 1 to 3, wherein: the external power supply (9) and the internal power supply (10) both adopt +3.6V direct current power supplies.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020385311.5U CN211576271U (en) | 2020-03-24 | 2020-03-24 | Battery current supply instrument with internal and external power supply switching function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020385311.5U CN211576271U (en) | 2020-03-24 | 2020-03-24 | Battery current supply instrument with internal and external power supply switching function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211576271U true CN211576271U (en) | 2020-09-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020385311.5U Active CN211576271U (en) | 2020-03-24 | 2020-03-24 | Battery current supply instrument with internal and external power supply switching function |
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| CN (1) | CN211576271U (en) |
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2020
- 2020-03-24 CN CN202020385311.5U patent/CN211576271U/en active Active
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| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Liu Ling Inventor after: Zhao He Inventor after: Wang Lanting Inventor after: Chen Xiaofeng Inventor after: Wang Jingang Inventor after: Zhang Shenghai Inventor after: Ma Pengfei Inventor before: Liu Ling Inventor before: Zhao He Inventor before: Wang Lanting Inventor before: Chen Xiaofeng Inventor before: Wang Jingang Inventor before: Zhang Shenghai Inventor before: Ma Pengfei |