CN204118850U - A kind of flowmeter electric power system - Google Patents
A kind of flowmeter electric power system Download PDFInfo
- Publication number
- CN204118850U CN204118850U CN201420352988.3U CN201420352988U CN204118850U CN 204118850 U CN204118850 U CN 204118850U CN 201420352988 U CN201420352988 U CN 201420352988U CN 204118850 U CN204118850 U CN 204118850U
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- China
- Prior art keywords
- unit
- output
- power supply
- externally fed
- flowmeter
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- Expired - Lifetime
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- 238000002955 isolation Methods 0.000 claims abstract description 24
- 238000005265 energy consumption Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 239000004065 semiconductor Substances 0.000 description 4
- 230000003750 conditioning effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
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Abstract
The utility model relates to intelligent flow meter power-supply system for electrical domain, be specifically related to a kind of flowmeter electric power system, this system comprises externally fed unit, battery power supply unit and carries out automatic switch unit for controlling between the two when externally fed unit and battery power supply unit are powered to flowmeter system respectively, and this switch unit is connected with this externally fed unit and battery power supply unit respectively; This system also comprises the isolation DC/DC unit for high_voltage isolation, and the input of described isolation DC/DC unit connects the output of described externally fed unit, and meanwhile, its output is connected with described switch unit; Described switch unit comprises P channel MOS tube, and the grid of this P channel MOS tube is connected the described output of externally fed unit and the output of battery power supply unit respectively with drain electrode.The utility model is low in energy consumption, and can life-span of protection system supplying cell.
Description
Technical field
The utility model relates to intelligent flow meter field of power systems, particularly a kind of electric power system for flowmeter.
Background technology
At present, there is 24V external dc power and power and 3.6V powered battery two kinds of powering modes in the intelligent flow meter that market exists, generally, domestic flow meter adopts powered battery, and general enterprises is in order to guaranteed flow meter continuous firing, directly adopt external power source.But, in actual use, when this any one powering mode is used alone, equal Shortcomings part, e.g., adopts external dc powering mode to power, when externally fed because a variety of causes is stopped power supply suddenly, not only can damage flowmeter system, also can cause and be interrupted at certain hour flow meters work, the deviation of metering can be caused and bring trade dispute; And when adopting powered battery, battery life is shorter, equally cannot the continued power of guaranteed flow meter.
Utility model content
The problems referred to above that the utility model exists for prior art, provide a kind of flowmeter electric power system, can realize external power source and battery supply and automatically switch and to power to flowmeter.When not having external power source, powered by internal electric source, when there being external power source, system automatic seamless is switched to external power source, neither affects the normal work of whole system, can save again the electricity of internal cell, improve the useful life of battery; When external power source disappears, system again automatic seamless is switched to internal battery powers, does not affect again the normal work of whole system.
To achieve these goals, the technical solution adopted in the utility model is:
A kind of flowmeter electric power system, comprises externally fed unit, battery power supply unit and for controlling the switch unit carrying out when externally fed unit and battery power supply unit are powered to flowmeter system respectively switching between the two; Wherein, this switch unit is connected with described externally fed unit and battery power supply unit respectively.
As preferably, described switch unit is P channel MOS tube, the grid of this P channel MOS tube is connected the described output of externally fed unit and the output of battery power supply unit respectively with drain electrode, with the switching that this to control when externally fed unit and battery power supply unit are powered to flowmeter system respectively between the two, adopt high voltage drive type metal-oxide-semiconductor as switch unit, power consumption is less.
As preferably, this system also comprises the isolation DC/DC unit for high_voltage isolation, the input of described isolation DC/DC unit connects described externally fed unit output, and output is connected with one end of described switch unit, adopt do not isolate DC/DC unit altogether, step-down preliminary treatment can be carried out to the output voltage of outside power supply unit, avoid the overtension of externally fed unit, damage flowmeter system.
As preferably, this flowmeter electric power system also comprises linear voltage regulator LDO HT7540, the output of the isolation DC/DC described in access, when flowmeter system adopts external power source, plays the effect of step-down and voltage stabilizing.
As preferably, this flowmeter electric power system also comprises diode IN5819, and the LDO HT7540 described in its one end connects, the electric power system interface of other end connection traffic meter, plays the effect of high-frequency rectification.
As preferably, electric capacity C1 and C2 that this flowmeter electric power system is also connected with described output of isolating DC/DC unit, electric capacity C3 and C4 be connected with described linear voltage regulator LDO HT7540 output, electric capacity C7 and C8 be connected with described battery power supply unit output and electric capacity C5 and C6 be connected with P channel MOS tube output, increase these electric capacity in systems in which, filter out power can disturb, the ripple of power supply is reduced as far as possible, is convenient to the process of subsequent conditioning circuit to supply current.
In sum, owing to have employed technique scheme, the beneficial effects of the utility model are:
1, by arranging switch unit, especially adopt P channel MOS tube as switch unit, switch operating when responsible external power source and battery supply are powered to flowmeter system, when there being external power to access, automatically switch to external power to power, can not only battery supply be saved, simultaneously, power supply can be prevented to battery reverse charge, damage battery supply.
2, use isolation DC/DC unit module, external power source high voltage is reduced in range of voltage values that flowmeter presets, when external power incoming stream gauge electric power system, isolation DC/DC unit is set and flow meter system can plays the effect of high voltage protective.
3, in native system, by arranging linear voltage regulator LDO HT7540 and rectifier diode IN5819, when external power is to system power supply, the voltage that effectively can control the output of externally fed unit, in flowmeter system operating voltage, makes the forward voltage drop of diode can not exceed its threshold values.
Accompanying drawing explanation
Fig. 1 is the circuit structure block diagram of embodiment 1
Fig. 2 is isolation DC/DC structured flowchart of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in detail.
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
Embodiment 1: the present embodiment peripheral power supply unit voltage is 24V, and the voltage of battery power supply unit is 3.6V, adopts P channel MOS tube as switch unit in the present embodiment
The utility model provides a kind of flowmeter electric power system, it comprise externally fed unit, battery power supply unit, for the isolation DC/DC unit of high_voltage isolation with for controlling the P channel MOS tube Q1 switched when externally fed unit and battery power supply unit are powered to flowmeter system respectively.
Wherein, as shown in Figure 2, externally fed unit connects described isolation DC/DC unit Vin and holds, by described isolation DC/DC, the 24V high-tension current provided by externally fed unit converts 5V low-voltage to, exports this low-voltage from Vo end, and externally fed unit passes through this isolation DC/DC to system power supply, not only reduce the voltage of externally fed unit, improve the antijamming capability of system simultaneously.
As shown in Figure 1, the output of the above-mentioned voltage through the externally fed unit of isolation DC/DC unit step-down after anti-interference process is connected the grid of described P channel MOS tube, the output of described battery power supply unit connects the drain electrode of P channel MOS tube, as Fig. 1, when exterior power supply plant accesses, the output voltage of externally fed unit higher than the output voltage of battery power supply unit, described P channel MOS tube cut-off, now, powered to flowmeter system by externally fed unit; When not having externally fed unit to access, the output end voltage of the externally fed unit be connected with P channel MOS tube grid is 0, now, P channel MOS tube Q1 conducting, described battery power supply unit is powered to flowmeter system by the Milliohm resistance (can ignore) of described metal-oxide-semiconductor inside.
As shown in Figure 1, electric power system described in the present embodiment also comprises the linear voltage regulator LDO HT7540 and diode IN5819 that connect successively, and the input of described linear voltage regulator LDO HT7540 connects the output of described isolation DC/DC unit, in the present embodiment, the 24V high-tension current of externally fed unit input is after isolation DC/DC unit step-down process, the voltage being input to linear voltage regulator LDO HT7540 is 5V, after this LDO HT7540 step-down process, voltage becomes 4V, simultaneously, the conduction voltage drop of described diode IN5819 is 0.3V, therefore the voltage exported after described diode IN5819 process is 3.7V, the electric power system of described diode IN5819 output connection traffic meter is to system power supply.
Due to, in the present embodiment, the voltage of the battery power supply unit selected is 3.6V, the conducting voltage of described P channel MOS tube Q1 internal body diodes is 0.6V, the output voltage 3.6 that the output voltage 3.7 of externally fed unit deducts battery power supply unit equals 0.1V, be less than the conducting voltage 0.6V of metal-oxide-semiconductor Q1 internal body diodes, now metal-oxide-semiconductor Q1 internal body diodes can not conducting, therefore, also external power can not be caused to charge to reverse battery when there being externally fed unit to access, not only energy savings, it also avoid damage storage battery simultaneously.
Embodiment 2, as shown in Figure 1, the present embodiment is on the basis of embodiment 1, electric capacity C1 and C2 is connected respectively at the output of described isolation DC/DC unit, electric capacity C3 and C4 is connected at the output of described linear voltage regulator LDO HT7540, electric capacity C7 and C8 is connected at the output of described battery power supply unit, the output of P channel MOS tube Q1 is at connection electric capacity C5 and C6, increase these electric capacity in systems in which, can filter out power disturb, the ripple of power supply is reduced as far as possible, is convenient to the process of subsequent conditioning circuit to supply current.
All have employed P channel MOS tube in above embodiment as switch unit, for controlling externally fed unit and in-line power unit to switching during system power supply, P channel MOS tube because of power consumption lower as better selection of the present utility model; Other can play the triode of high level conducting effect, special diverter switch etc. all can realize the purpose of this utility model, and relative to P channel MOS tube, its cost is higher.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection range of the present utility model.
Claims (4)
1. a flowmeter electric power system, comprise externally fed unit, battery power supply unit and for controlling the switch unit switched when described externally fed unit and battery power supply unit are powered to flowmeter system between the two, this switch unit is connected with this externally fed unit and battery power supply unit respectively; It is characterized in that, this system also comprises the isolation DC/DC unit for high_voltage isolation, and the input of described isolation DC/DC unit connects the output of described externally fed unit, and meanwhile, its output is connected with described switch unit; Described switch unit comprises P channel MOS tube, and the grid of this P channel MOS tube is connected the described output of externally fed unit and the output of battery power supply unit respectively with drain electrode.
2. flowmeter electric power system according to claim 1, is characterized in that, also comprises linear voltage regulator LDO HT7540, the output of the isolation DC/DC described in its input connects.
3. flowmeter electric power system according to claim 2, is characterized in that, this flowmeter electric power system also comprises diode IN5819, the linear voltage regulator LDO HT7540 described in its one end connects, the electric power system of other end connection traffic meter.
4. flowmeter electric power system according to claim 2, it is characterized in that, this flowmeter electric power system also comprises electric capacity C1 and C2 that described isolation DC/DC unit output connects, electric capacity C3 and C4 be connected with described LDO HT7540 output, electric capacity C7 and C8 be connected with the output of described battery power supply unit, electric capacity C5 and C6 be connected with the output of P channel MOS tube Q1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420352988.3U CN204118850U (en) | 2014-06-26 | 2014-06-26 | A kind of flowmeter electric power system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420352988.3U CN204118850U (en) | 2014-06-26 | 2014-06-26 | A kind of flowmeter electric power system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204118850U true CN204118850U (en) | 2015-01-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420352988.3U Expired - Lifetime CN204118850U (en) | 2014-06-26 | 2014-06-26 | A kind of flowmeter electric power system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204118850U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106773854A (en) * | 2016-12-22 | 2017-05-31 | 南京熊猫电子股份有限公司 | A kind of multi-functional I/O module for robot |
| CN108808841A (en) * | 2018-06-29 | 2018-11-13 | 南方电网科学研究院有限责任公司 | Power supply switching system and intelligent electric energy meter |
| CN110729811A (en) * | 2019-10-17 | 2020-01-24 | 浙江威星智能仪表股份有限公司 | Main and standby power switching circuit of electronic gas meter |
-
2014
- 2014-06-26 CN CN201420352988.3U patent/CN204118850U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106773854A (en) * | 2016-12-22 | 2017-05-31 | 南京熊猫电子股份有限公司 | A kind of multi-functional I/O module for robot |
| CN108808841A (en) * | 2018-06-29 | 2018-11-13 | 南方电网科学研究院有限责任公司 | Power supply switching system and intelligent electric energy meter |
| CN108808841B (en) * | 2018-06-29 | 2022-05-24 | 南方电网科学研究院有限责任公司 | Power supply switching system and intelligent electric energy meter |
| CN110729811A (en) * | 2019-10-17 | 2020-01-24 | 浙江威星智能仪表股份有限公司 | Main and standby power switching circuit of electronic gas meter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: No. 536, Section 1, airport 1st Road, Shuangliu Southwest Airport, Chengdu, Sichuan 610211 Patentee after: Chengdu Qianjia Technology Co.,Ltd. Address before: No. 536, Section 1, airport 1st Road, Shuangliu Southwest Airport, Chengdu, Sichuan 610211 Patentee before: Chengdu Qianjia Technology Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CX01 | Expiry of patent term |
Granted publication date: 20150121 |
|
| CX01 | Expiry of patent term |