CN213812636U - Temperature acquisition sending terminal for switch cabinet - Google Patents
Temperature acquisition sending terminal for switch cabinet Download PDFInfo
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- CN213812636U CN213812636U CN202022698829.7U CN202022698829U CN213812636U CN 213812636 U CN213812636 U CN 213812636U CN 202022698829 U CN202022698829 U CN 202022698829U CN 213812636 U CN213812636 U CN 213812636U
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Abstract
The utility model discloses a temperature acquisition sending terminal for a switch cabinet, which is respectively and fixedly arranged at a plum blossom contact, a bus bar and a cable joint inside the switch cabinet through steel ribbons (2); the wireless temperature sensor mainly comprises a protective shell (1), a wireless MCU, a digital temperature sensor, a wireless transmitting antenna, an induction power taking module and a current acquisition module; the digital temperature sensor, the wireless transmitting antenna, the induction power taking module and the current acquisition module are respectively connected with the wireless MCU; and the wireless MCU, the digital temperature sensor, the wireless transmitting antenna and the current acquisition module are respectively and fixedly arranged in the protective shell. The utility model discloses simple structure, small, interference killing feature are strong, have realized the real-time collection and the monitoring to temperature and electric current.
Description
Technical Field
The utility model belongs to the technical field of power equipment, especially, a temperature acquisition transmitting terminal for cubical switchboard has been related to.
Background
The switch cabinet is a complete set of switch equipment, the internal structure of the switch cabinet comprises various protection devices such as a circuit breaker, an operating mechanism and a sensor, and the switch cabinet is mainly used for opening and closing and controlling and protecting electric equipment when an electric power system stably runs. Because the inside high-tension apparatus of cubical switchboard can produce resistive loss, hysteresis eddy current loss and dielectric loss and the structure of opening and shutting appears the oxidation wear, circuit breaker contact ageing and bus-bar joint are not hard up etc. all can make the inside temperature of cubical switchboard rise, the cubical switchboard leakproofness is strong and the air permeability is poor if the heat can not in time be discharged, too high temperature rise can make contact and cable crimping point overheat and burn out, serious accident such as power failure explosion even lead to the cubical switchboard to catch fire, the operation of the inside power equipment of cubical switchboard is unusual or the trouble shows for the rising of temperature usually, therefore the temperature on-line measuring and the early warning of cubical switchboard are to the most direct effectual means of power equipment control have important meaning to power system's reliability and security.
At present, various temperature measurement technologies mainly comprise contact temperature measurement and non-contact temperature measurement, and compared with the traditional method, namely a temperature indicating wax sheet method, the temperature measurement precision is simple and visual, and the temperature measurement precision is not high, and a person on duty needs to check the temperature measurement precision regularly, an optical fiber temperature measurement method is difficult to adapt to the problem that wiring is complex in a closed narrow environment in a switch cabinet, a creepage fault can be caused if dirt exists on the surface of an optical fiber after long-term working, and an infrared temperature measurement method is easy to be shielded by objects and has an installation problem.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a temperature acquisition transmitting terminal for cubical switchboard to exist not enough among the prior art. The utility model discloses can gather cubical switchboard inside power equipment's state and data in real time and transmit and carry out reliable early warning and future temperature rise trend prediction for the backstage and judge future trouble and can stabilize permanent operation under the environment of the inside high electromagnetic field of cubical switchboard, heavy current.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a temperature acquisition sending terminal for a switch cabinet is fixedly arranged at a plum blossom contact, a busbar and a cable joint inside the switch cabinet through steel ties; the wireless temperature sensor comprises a protective shell, a wireless MCU, a digital temperature sensor, a wireless transmitting antenna, an induction power taking module and a current acquisition module; the digital temperature sensor, the wireless transmitting antenna, the induction power taking module and the current acquisition module are respectively connected with the wireless MCU; and the wireless MCU, the digital temperature sensor, the wireless transmitting antenna and the current acquisition module are respectively and fixedly arranged in the protective shell.
The utility model discloses a temperature acquisition transmitting terminal installs a plurality of temperature measurement punishment department at the cubical switchboard to set up different ID in order to distinguish different positions, subsequent data processing and analysis of being convenient for.
Further, the induction power taking module comprises an induction coil, a rectification filter circuit, an overvoltage protection circuit and a DC/DC module circuit; the induction coil should be 4000 bundles and wound on the steel binding belt; the rectification filter circuit, the overvoltage protection circuit and the DC/DC module circuit are arranged in the protective shell. The induction electricity taking module is independent of the current collecting module, adopts an induction coil to take electricity, directly induces electromagnetic energy to obtain electric energy, and supplies power to the wireless MCU through rectification, filtering and voltage stabilizing circuit.
Further, a groove is formed in the temperature measurement contact surface of the protective shell; a boron nitride heat-conducting block is arranged in the groove; the digital temperature sensor is tightly attached to the boron nitride heat-conducting block.
Further, the digital temperature sensor is a DS18B20 patch. The current acquisition module adopts Rogowski coil sampling and has no magnetic core saturation. The wireless MCU is an ultra-low power consumption singlechip. The wireless transmitting antenna is a PCB antenna, and the anti-interference capability is enhanced by adopting copper-clad grounding treatment.
Further, the protective shell is provided with a through hole for inserting the steel cable tie.
Further, the protective shell is made of epoxy resin materials, and can effectively insulate and resist high temperature to protect internal parts and circuits. The steel ribbon is made of a magnetic conductive material, the induction coil is converted into electric energy through induction electromagnetic energy, and energy storage and power supply are carried out through a capacitor in a circuit.
The utility model discloses a theory of operation:
the protective shell of the temperature sending end is made of epoxy resin materials, binding band through holes penetrating through the protective shell through a steel binding band are respectively fixed at a plum blossom contact, a busbar and a cable joint for temperature and current sampling, IDs are set at different positions according to temperature measurement, a digital temperature sensor adopts a DS18B20 paster, the temperature measurement is realized in a contact mode through a heat conduction block in a groove of the protective shell in a direct contact mode, the transmission of temperature data can be realized only through a single bus, a current acquisition module adopts a Rogowski coil for current sampling, no magnetic saturation exists, an induction coil of an induction electricity taking module obtains electric energy by utilizing the electromagnetic induction principle independently of the Rogowski coil, stable direct current power supply is carried out through rectification, filtering and voltage stabilization, the electric energy obtained by the induction coil is stored through a capacitor, when the stored energy voltage exceeds 3.8V, the wireless MCU starts to sample current signals, and the induction electricity taking module stops supplying power to the wireless MCU, at the moment, current and temperature sampling is carried out synchronously, the accuracy of data synchronism during early warning prediction of follow-up temperature rise is guaranteed, when the voltage detection circuit detects that the voltage drops to about 2.8V of the lowest working voltage of the wireless MCU, the induction coil of the induction electricity taking module continues to store energy and supply power to 3.8V of the wireless MCU, the sampled data are converted into digital signals identified by a singlechip function through an AD conversion circuit of the wireless MCU, wireless radio frequency is transmitted to a management background through a wireless transmitting antenna, and subsequent data processing and early warning are carried out.
The management background carries out temperature rise early warning and judgment according to the received current and temperature data, errors caused by setting a single temperature threshold value are avoided through algorithm processing of a single-point warning method and a multi-point differential method, warning of different defect levels is made through an alarm, warning position ID and temperature current data are displayed on a display screen, finally temperature rise trend prediction is carried out through a temperature rise prediction model obtained through the measured current and temperature data, the possibility of future fault occurrence is judged, the protection capability is further improved, meanwhile, temperature current data information and early warning prediction information stored in a database are sent to a display terminal through a GPRS module, workers can conveniently monitor in real time, and faults can be found and eliminated in time.
The utility model has the advantages that:
1. the utility model discloses for synchronous sampling when carrying out temperature and current sampling, carry out the collection of temperature and electric current to the measuring point at same moment promptly, reduce the error that brings and influence the accuracy of temperature rise prediction algorithm model because of data are asynchronous.
2. The induction coil of the induction electricity taking module and the Rogowski coil of the current acquisition module are completely independent, interference can be avoided, sampling precision is guaranteed, products are diversified, the Rogowski coil can be replaced at any time when current sampling is carried out on different products, the Rogowski coil is not limited by the induction coil, the current sampling uses the Rogowski coil to have no iron core, and the precision is high and has no magnetic saturation.
3. The heat conducting block between the digital temperature sensor and the temperature measuring point is made of boron nitride material, so that the heat conducting performance is good, the insulation is realized, and the requirement of contact temperature measurement of the temperature sensor is met.
4. The digital temperature sensor adopts a DS18B20 digital temperature sensor patch, a single bus can carry out data transmission, digital quantity can be directly output to be directly read by a single chip microcomputer, the size of the measuring module is greatly reduced, the power consumption is reduced, and the anti-interference capability is enhanced.
5. The wireless transmitting antenna adopts a PCB antenna, the hardware volume and the development cost are reduced, the use is more convenient, devices are placed in the vicinity of the wireless transmitting antenna as few as possible, the blank position is grounded by covering copper, the anti-interference capability is enhanced, and the wireless performance is optimized through a balun circuit consisting of a capacitor and an inductor, so that the radio frequency communication precision is high and the sensitivity is excellent.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is a structural sectional view of an embodiment of the present invention.
Fig. 3 is a schematic view illustrating an embodiment of the present invention installed on a tulip contact of a switch cabinet.
Reference numerals: 1-protective shell, 2-steel ribbon and 3-groove.
Detailed Description
In order to make the technical problem, technical scheme and beneficial effect that the utility model discloses a will solve more clearly understand, it is right to combine the attached drawing and embodiment below the utility model discloses go on further detailed description. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.
Example (b):
referring to fig. 1 to 3, a temperature acquisition transmitting terminal for a switch cabinet is fixedly installed at a tulip contact, a busbar and a cable joint inside the switch cabinet through steel ties 2. The wireless temperature sensor mainly comprises a protective shell 1, a wireless MCU, a digital temperature sensor, a wireless transmitting antenna, an induction power taking module and a current acquisition module; the digital temperature sensor, the wireless transmitting antenna, the induction power taking module and the current acquisition module are respectively connected with the wireless MCU; and the wireless MCU, the digital temperature sensor, the wireless transmitting antenna and the current acquisition module are respectively and fixedly arranged in the protective shell.
The induction electricity taking module comprises an induction coil, a rectification filter circuit, an overvoltage protection circuit and a DC/DC module circuit; the induction coil is 4000 bundles and is wound on the steel binding belt 2; the rectification filter circuit, the overvoltage protection circuit and the DC/DC module circuit are arranged in the protective shell 1.
The temperature measurement contact surface of the protective shell 1 is provided with a groove 3; a boron nitride heat conduction block is arranged in the groove 3; the digital temperature sensor is tightly attached to the boron nitride heat-conducting block. And the protective shell 1 is also provided with a through hole for inserting the steel cable tie 2.
The digital temperature sensor adopts a DS18B20 patch. The current acquisition module adopts Rogowski coil sampling and has no magnetic core saturation. The wireless MCU is an ultra-low power consumption singlechip. The wireless transmitting antenna is a PCB antenna, and the anti-interference capability is enhanced by adopting copper-clad grounding treatment.
It should be understood that the above-described embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the practice of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description; this is not necessary, nor exhaustive, of all embodiments; and obvious changes and modifications may be made without departing from the scope of the present invention.
Claims (9)
1. A temperature acquisition sending terminal for a switch cabinet is fixedly arranged at a plum blossom contact, a busbar and a cable joint inside the switch cabinet through steel ribbons (2); the method is characterized in that: the wireless temperature sensor comprises a protective shell (1), a wireless MCU, a digital temperature sensor, a wireless transmitting antenna, an induction power taking module and a current acquisition module; the digital temperature sensor, the wireless transmitting antenna, the induction power taking module and the current acquisition module are respectively connected with the wireless MCU; and the wireless MCU, the digital temperature sensor, the wireless transmitting antenna and the current acquisition module are respectively and fixedly arranged in the protective shell.
2. The temperature acquisition transmitting terminal for the switch cabinet according to claim 1, wherein: the induction electricity taking module comprises an induction coil, a rectification filter circuit, an overvoltage protection circuit and a DC/DC module circuit; the induction coil is 4000 bundles and is wound on the steel binding belt (2); the rectification filter circuit, the overvoltage protection circuit and the DC/DC module circuit are arranged in the protective shell (1).
3. The temperature acquisition transmitting terminal for the switch cabinet according to claim 1 or 2, wherein: a groove (3) is formed in the temperature measurement contact surface of the protective shell (1); a boron nitride heat conduction block is arranged in the groove (3); the digital temperature sensor is tightly attached to the boron nitride heat-conducting block.
4. The temperature acquisition transmitting terminal for the switch cabinet according to claim 1, wherein: the digital temperature sensor adopts a DS18B20 patch.
5. The temperature acquisition transmitting terminal for the switch cabinet according to claim 1, wherein: the current acquisition module adopts Rogowski coil sampling and has no magnetic core saturation.
6. The temperature acquisition transmitting terminal for the switch cabinet according to claim 1, wherein: the induction electricity taking module is independent of the current collecting module, adopts an induction coil to take electricity, directly induces electromagnetic energy to obtain electric energy, and supplies power to the wireless MCU through rectification, filtering and voltage stabilizing circuit.
7. The temperature acquisition transmitting terminal for the switch cabinet according to claim 1, wherein: the wireless MCU is an ultra-low power consumption singlechip.
8. The temperature acquisition transmitting terminal for the switch cabinet according to claim 1, wherein: the wireless transmitting antenna is a PCB antenna, and the anti-interference capability is enhanced by adopting copper-clad grounding treatment.
9. The temperature acquisition transmitting terminal for the switch cabinet according to claim 1, wherein: the protective casing (1) is also provided with a through hole for inserting the steel cable tie (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022698829.7U CN213812636U (en) | 2020-11-20 | 2020-11-20 | Temperature acquisition sending terminal for switch cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022698829.7U CN213812636U (en) | 2020-11-20 | 2020-11-20 | Temperature acquisition sending terminal for switch cabinet |
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| Publication Number | Publication Date |
|---|---|
| CN213812636U true CN213812636U (en) | 2021-07-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022698829.7U Active CN213812636U (en) | 2020-11-20 | 2020-11-20 | Temperature acquisition sending terminal for switch cabinet |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113847952A (en) * | 2021-09-24 | 2021-12-28 | 广西电网有限责任公司电力科学研究院 | Wireless device for measuring temperature and load current of cable based on induction electricity taking |
-
2020
- 2020-11-20 CN CN202022698829.7U patent/CN213812636U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113847952A (en) * | 2021-09-24 | 2021-12-28 | 广西电网有限责任公司电力科学研究院 | Wireless device for measuring temperature and load current of cable based on induction electricity taking |
| CN113847952B (en) * | 2021-09-24 | 2023-12-19 | 广西电网有限责任公司电力科学研究院 | Wireless device for measuring cable temperature and load current based on induction power taking |
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