CN204988548U - A low pick -up current wireless temperature measuring device for cubical switchboard - Google Patents
A low pick -up current wireless temperature measuring device for cubical switchboard Download PDFInfo
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- CN204988548U CN204988548U CN201520750012.6U CN201520750012U CN204988548U CN 204988548 U CN204988548 U CN 204988548U CN 201520750012 U CN201520750012 U CN 201520750012U CN 204988548 U CN204988548 U CN 204988548U
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Abstract
The utility model discloses a low pick -up current wireless temperature measuring device for cubical switchboard, including CT current conversion module, voltage doubler rectifier circuit, energy storage filter circuit, voltage detection circuit, switching power supply chip, MCU and temperature sensor, the CT current conversion module output is connected with voltage doubler rectifier circuit, and the voltage doubler rectifier circuit output is connected with energy storage filter circuit, and energy storage filter circuit output is connected with voltage detection circuit and switching power supply chip respectively, and MCU is connected to voltage detection circuit's output, and switching power supply chip output is connected with MCU and wireless communication module respectively, and MCU is connected with voltage doubler rectifier circuit 0 and carries temperature information to the remote port with the help of wireless communication module. The utility model discloses can realize that cubical switchboard low current operating condition effectively monitors its temperature down, ensure the safety in utilization of cubical switchboard.
Description
Technical field
The utility model relates to wireless temperature measurement technical field, refers in particular to a kind of low starting current wireless temperature measuring device for switch cubicle.
Background technology
Switch cubicle is as electric system important component part, and its safe operation is significant, and temperature is one of important parameter weighing switch cubicle running status.Interface heating in switch cubicle high voltage electric equipment, between equipment is electric power conveying weakest link, therefore, need the temperature rise of Real-Time Monitoring interface, and give warning in advance when temperature anomaly, so that personnel overhaul in time, improve the safety and reliability of Operation of Electric Systems.
But, exposed high pressure is had in switch cubicle, space-closed is narrow and small, cannot manually to patrol thermometric, in prior art, the starting current of major part CT power taking need be greater than 50A, wireless temperature measuring device could normally work, once starting current is lower than 50A, namely wireless temperature measuring device cannot monitor the temperature rise of interface, as switch cubicle be in reduced-current state under work time, partial switch cabinet in the early stage section for a long time in low current work, these all require will carry out effective monitoring to its temperature, to avoid still may occurring the problem that interface thermal value is large under the prerequisite that electric current is less, finally cause security incident.
Therefore, for solving the problem, prior art realizes wireless temperature measurement by powered battery, but, due to the finite capacity of battery, in order to save the power consumption of battery, wireless temperature measuring device need adopt discontinuous to carry out detected temperatures, and collecting temperature real-time is poor, reaches the collection period of 5 minutes, the time of temperature-responsive is longer, and after using a period of time, battery need be changed, the convenience that impact uses, in view of this, this case is then had to produce.
Utility model content
The purpose of this utility model is to provide a kind of low starting current wireless temperature measuring device for switch cubicle, effectively monitors, guarantee the safety in utilization of switch cubicle under realizing switch cubicle low current duty to its temperature.
For reaching above-mentioned purpose, solution of the present utility model is:
For a low starting current wireless temperature measuring device for switch cubicle, comprise CT current conversion module, voltage doubling rectifing circuit, energy storage filtering circuit, voltage detecting circuit, switching power source chip, MCU and temperature sensor; CT current conversion module output terminal is connected with voltage doubling rectifing circuit, voltage doubling rectifing circuit output terminal is connected with energy storage filtering circuit, energy storage filtering circuit output terminal is connected with voltage detecting circuit and switching power source chip respectively, the output terminal of voltage detecting circuit connects MCU, switching power source chip output terminal is connected with MCU and wireless communication module respectively, and MCU is connected with temperature sensor temperature information is delivered to remote port by wireless communication module.
Further, also comprise high current protection circuit, the input end of high current protection circuit connects CT current conversion module, and the output terminal of high current protection circuit connects voltage doubling rectifing circuit.
Further, temperature sensor is digital temperature sensor.
After adopting such scheme, the utility model CT current conversion module converts secondary side alternating current to the primary side current of CT; The DC voltage of the exportable twice of voltage doubling rectifing circuit, especially in the effect of low current input section Nei Keda twice coil; The exportable more stable direct current of energy storage filtering circuit; Switching power source chip is burning voltage the voltage transitions that energy storage filtering circuit exports; The magnitude of voltage that voltage detecting circuit exports the voltage in proportion exported with energy storage filtering circuit can to determine the electric current of CT primary side to MCU, MCU according to the mode of operation of the magnitude of voltage gathered and MCU; MCU gathers junction temperature data according to the temperature sensor detected; By wireless communication module, data are transported to host remote end.
When the electric current of CT primary side is less than setting value as 30A, enter low-power consumption mode, send a temperature data frame at regular intervals, most of the time is in dormancy, all functions module all closes its power supply, MCU also enters dormancy, only waking collection input voltage up at regular intervals, when sending temperature data frame time then, first open the power supply of temperature sensor and collecting temperature, rear powered-down, then open the power supply of wireless communication module and send temperature data frame to main frame, also its power supply is closed after distributing, each duty can reach lowest power consumption like this, thus can detected temperatures be completed under lower electric current.
Therefore, the utility model is effectively monitored its temperature under can realizing switch cubicle low current duty, guarantees the safety in utilization of switch cubicle.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Label declaration
CT current conversion module 1 voltage doubling rectifing circuit 2
Energy storage filtering circuit 3 voltage detecting circuit 4
Switching power source chip 5MCU6
Temperature sensor 7 wireless communication module 8
High current protection circuit 9.
Embodiment
Below in conjunction with drawings and the specific embodiments, the present invention is described in detail.
Consult shown in Fig. 1, a kind of low starting current wireless temperature measuring device for switch cubicle that the utility model discloses, comprises CT current conversion module 1, voltage doubling rectifing circuit 2, energy storage filtering circuit 3, voltage detecting circuit 4, switching power source chip 5, MCU6 and temperature sensor 7.
CT current conversion module 1 output terminal is connected with voltage doubling rectifing circuit 2, voltage doubling rectifing circuit 2 output terminal is connected with energy storage filtering circuit 3, energy storage filtering circuit 3 output terminal is connected with voltage detecting circuit 4 and switching power source chip 5 respectively, the output terminal of voltage detecting circuit 4 connects MCU6, and switching power source chip 5 output terminal is connected with MCU6 and wireless communication module 8 respectively.
MCU6 is connected with temperature sensor 7 temperature information is delivered to remote port by wireless communication module 8, and temperature sensor 7 is preferably digital temperature sensor.
In the present embodiment, arrange high current protection circuit 9 between CT current conversion module 1 and voltage doubling rectifing circuit 2, the input end of high current protection circuit 9 connects CT current conversion module 1, and the output terminal of high current protection circuit 9 connects voltage doubling rectifing circuit 2.
The signal of switching power source chip 5 is preferably the power supply chip from below power consumption 100uA.High current protection circuit 9 adopts the circuit of two-way TVS pipe and bidirectional triode thyristor composition, ensures follow-up VD not higher than the maximum permissible voltage of switching power source chip 5.Wireless communication module 8 adopts 2.4G wireless communication technique, and communication speed is fast, can greatly reduce its working time, namely reduce instantaneous power consumption when low current.
The utility model CT current conversion module 1 converts secondary side alternating current to the primary side current of CT; The voltage that high current protection circuit 9 prevents the too large output of primary side current too high; The DC voltage of the exportable twice of voltage doubling rectifing circuit 2, especially in the effect of low current input section Nei Keda twice coil; The exportable more stable direct current of energy storage filtering circuit 3; Switching power source chip 5 is burning voltage the voltage transitions that energy storage filtering circuit 3 exports; The magnitude of voltage that voltage detecting circuit 4 exports the voltage in proportion exported with energy storage filtering circuit 3 can to determine the electric current of CT primary side to MCU6, MCU6 according to the mode of operation of the magnitude of voltage gathered and MCU6; MCU6 gathers junction temperature data according to the digital temperature sensor 7 detected; By wireless communication module 8, data are transported to host remote end.
When the electric current of CT primary side is less than setting value as 30A, enter low-power consumption mode, send a temperature data frame at regular intervals, most of the time is in dormancy, all functions module all closes its power supply, MCU also enters dormancy, only waking collection input voltage up at regular intervals, when sending temperature data frame time then, first open the power supply of digital temperature sensor and collecting temperature, rear powered-down, then open the power supply of wireless communication module and send temperature data frame to main frame, also its power supply is closed after distributing, each duty can reach lowest power consumption like this, thus can detected temperatures be completed under lower electric current.Therefore, the utility model is effectively monitored its temperature under can realizing switch cubicle low current duty, guarantees the safety in utilization of switch cubicle.
The foregoing is only preferred embodiment of the present utility model, not to the restriction of this case design, all equivalent variations done according to the design key of this case, all fall into the protection domain of this case.
Claims (3)
1. for a low starting current wireless temperature measuring device for switch cubicle, it is characterized in that: comprise CT current conversion module, voltage doubling rectifing circuit, energy storage filtering circuit, voltage detecting circuit, switching power source chip, MCU and temperature sensor; CT current conversion module output terminal is connected with voltage doubling rectifing circuit, voltage doubling rectifing circuit output terminal is connected with energy storage filtering circuit, energy storage filtering circuit output terminal is connected with voltage detecting circuit and switching power source chip respectively, the output terminal of voltage detecting circuit connects MCU, switching power source chip output terminal is connected with MCU and wireless communication module respectively, and MCU is connected with temperature sensor temperature information is delivered to remote port by wireless communication module.
2. a kind of low starting current wireless temperature measuring device for switch cubicle as claimed in claim 1; it is characterized in that: also comprise high current protection circuit; the input end of high current protection circuit connects CT current conversion module, and the output terminal of high current protection circuit connects voltage doubling rectifing circuit.
3. a kind of low starting current wireless temperature measuring device for switch cubicle as claimed in claim 1 or 2, is characterized in that: temperature sensor is digital temperature sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520750012.6U CN204988548U (en) | 2015-09-25 | 2015-09-25 | A low pick -up current wireless temperature measuring device for cubical switchboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520750012.6U CN204988548U (en) | 2015-09-25 | 2015-09-25 | A low pick -up current wireless temperature measuring device for cubical switchboard |
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| Publication Number | Publication Date |
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| CN204988548U true CN204988548U (en) | 2016-01-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520750012.6U Active CN204988548U (en) | 2015-09-25 | 2015-09-25 | A low pick -up current wireless temperature measuring device for cubical switchboard |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109186796A (en) * | 2018-10-15 | 2019-01-11 | 江苏久创电气科技有限公司 | A kind of CT formula passive wireless temperature measuring device applied to switchgear |
| CN109813437A (en) * | 2019-01-29 | 2019-05-28 | 武汉科瑞新电气自动化有限公司 | Passive and wireless infrared temperature measurement apparatus |
-
2015
- 2015-09-25 CN CN201520750012.6U patent/CN204988548U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109186796A (en) * | 2018-10-15 | 2019-01-11 | 江苏久创电气科技有限公司 | A kind of CT formula passive wireless temperature measuring device applied to switchgear |
| CN109813437A (en) * | 2019-01-29 | 2019-05-28 | 武汉科瑞新电气自动化有限公司 | Passive and wireless infrared temperature measurement apparatus |
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