CN217005897U

CN217005897U - Wireless temperature measuring device for transformer

Info

Publication number: CN217005897U
Application number: CN202220131964.XU
Authority: CN
Inventors: 檀华; 顾祝君
Original assignee: Anhui Zhongdian Electrical Co ltd
Current assignee: Anhui Zhongdian Electrical Co ltd
Priority date: 2022-01-19
Filing date: 2022-01-19
Publication date: 2022-07-19
Anticipated expiration: 2032-01-19

Abstract

The utility model relates to a wireless temperature measuring device for a transformer, which comprises the transformer, wherein a coil of the transformer is connected with a detection shell (1), a detection device (10) consisting of a piezoelectric sensor (2), an energy collection chip (3), a single chip microcomputer (4), a temperature collection chip (5) and a wireless sending module (6) is fixed in the detection shell (1), the single chip microcomputer (4) is respectively and electrically connected with the energy collection chip (3), the temperature collection chip (5) and the wireless sending module (6), and the energy collection chip (3) is electrically connected with the piezoelectric sensor (2). The piezoelectric sensor supplies power to the device under the condition of no external power supply, avoids the complexity and inconvenient operation of additionally connecting an external power supply and supplying power by a battery, improves the use safety, and can be conveniently used and maintained at a later stage.

Description

Wireless temperature measuring device for transformer

Technical Field

The utility model relates to the technical field of transformer safety detection, in particular to a wireless temperature measuring device for a transformer.

Background

At present, with the increasing of household appliances, the increasing of factory capacity and the influence of temperature change, the load of a transformer is unstable, and the transformer can run fully or in overload within a specific period of time, so that the transformer is over-high in temperature and accidents occur.

Because the voltage of the transformer is too high, the temperature can not be measured by using a probe with a lead, so that the problem that the temperature measuring probe is difficult to get electricity is caused, if a battery is used for supplying power, the temperature measuring probe needs to be replaced regularly, and the power of the transformer needs to be cut off in the battery replacement process, so that the normal life and production are influenced.

Therefore, a passive temperature measurement alarm device is urgently needed to solve the problems.

SUMMERY OF THE UTILITY MODEL

The utility model provides a wireless temperature measuring device for a transformer.

The technical scheme is as follows:

the utility model provides a wireless temperature measuring device for transformer, includes the transformer, connects on the coil of transformer and detects casing, its characterized in that: the detection device which is composed of a piezoelectric sensor, an energy collection chip, a single chip microcomputer, a temperature collection chip and a wireless sending module is fixed in the detection shell, the single chip microcomputer is electrically connected with the energy collection chip, the temperature collection chip and the wireless sending module respectively, and the energy collection chip is electrically connected with the piezoelectric sensor.

Furthermore, the piezoelectric sensor, the energy collecting chip, the single chip microcomputer, the temperature collecting chip and the wireless sending module are all fixed on a circuit board, and the circuit board is fixed on a mounting column in the detection shell through screws.

Further, the temperature acquisition chip is a temperature and humidity sensor.

Furthermore, the detection shell is connected with a coil of the transformer through a high-temperature-resistant double faced adhesive tape.

Further, the detection shell is an insulation detection shell.

The utility model has the following beneficial effects:

the piezoelectric sensor provides power for the device under the condition of no external power supply, avoids the complexity and inconvenient operation of additionally connecting an external power supply and supplying power by a battery, improves the use safety, and is convenient to use and later maintenance.

Drawings

FIG. 1 is a schematic block diagram of the circuit connections of the present invention;

fig. 2 is a schematic structural diagram of the present invention.

Description of the reference numerals: 1. detecting the shell; 11. mounting a column; 2. a piezoelectric sensor; 3. an energy harvesting chip; 4. a single chip microcomputer; 5. a temperature acquisition chip; 6. a wireless transmission module; 7. high-temperature resistant double-sided adhesive tape; 8. a coil; 9. a circuit board; 10. and (4) a detection device.

Detailed Description

In order to make the present invention more clear, the wireless temperature measuring device for transformer of the present invention is further described below with reference to the attached drawings, and the specific embodiments described herein are only for explaining the present invention and are not used to limit the present invention.

As shown in fig. 1 and 2, the wireless temperature measuring device for the transformer comprises a transformer, wherein a rectangular detection shell 1 with insulating and flame-retardant properties is arranged on a coil 8 of the transformer, and the detection shell 1 is directly adhered to the outer surface of the coil 8 through a high-temperature-resistant double-sided adhesive tape 7. The detection shell 1 and the coil 8 are firmly connected and can transmit vibration energy when the transformer works. A detection device 10 consisting of a piezoelectric sensor 2, an energy collection chip 3, a single chip microcomputer 4, a temperature collection chip 5 and a wireless transmission module 6 is fixed in a detection shell 1, the components are integrated on a circuit board 9, and the circuit board is fixed on a corresponding mounting column 11 in the detection shell 1 through screws so as to be connected into a whole to improve the shockproof capability. The single chip microcomputer 4 is electrically connected with the energy collecting chip 3, the temperature collecting chip 5 and the wireless sending module 6 respectively, and the energy collecting chip 3 is electrically connected with the piezoelectric sensor 2.

The piezoelectric sensor 2 applies a certain vibration frequency to the piezoelectric ceramic therein, and charges are generated at both ends thereof to form a current through a loop.

The energy collecting chip 3 is an energy collecting chip with the model number of TLC3588, integrates low-noise full-wave rectification and a high-efficiency buck converter to form a complete electric energy collecting solution, and is suitable for energy sources with high output impedance, such as piezoelectric sensors. The input voltage of the high-voltage power supply is 2.7V-20V, the output current is up to 100mA, and the output voltage can be selected: 1.8V, 2.5V, 3.3V, 3.6V, the quiescent current is only: 950 nA.

The single chip microcomputer 4 is a low-power-consumption 8-bit single chip microcomputer with the model of STM8L101F3P6, the working frequency of the single chip microcomputer is 16M, the working voltage of the single chip microcomputer is 3.3V, the current in the shutdown mode is only 0.8uA, and the single chip microcomputer has the functions of hardware IIC communication and SPI communication.

The temperature acquisition chip 5 is a temperature and humidity sensor, can detect the temperature range of-40 ℃ to 125 ℃ and the humidity range of 0% to 100%, the working voltage range is 1.62V to 3.6V, the communication mode is I2C, and the communication speed can reach 400 KHz.

The wireless transmission module 6 adopts a wireless transmission module with the model number of NRF24L01, comprises a GFSK monolithic transceiver chip, is internally provided with a hardware link layer, has the functions of automatic response and automatic retransmission, and can select the wireless rate: 250KHZ, 1MHZ, 2MHZ, SPI interface rate: 0-8M, working voltage: 1.9V-3.6V.

In this scheme, after transformer circular telegram work, coil 8 of transformer can produce the vibration, piezoelectric sensor 2's piezoceramics will produce faint electric energy, energy collection chip 3 can be continuous collects the electric energy, reach a timing when the electric energy, energy collection chip 3 can open its inside switch and give singlechip 4 with electric energy steady voltage output, singlechip 4 provides stable power for temperature acquisition chip 5 and wireless sending module 6, singlechip 4 is gone up the electricity and can read the temperature data of temperature acquisition chip 5 through the IIC bus immediately, then pass to wireless sending module 6 through the SPI bus to temperature data with local ID, wireless sending module 6 goes out data transmission, accomplish the transmission of data. The maintenance personnel can detect the temperature condition of the coil of the transformer in real time through the data receiving end.

This scheme provides the power for this device through piezoelectric sensor under the condition of no external power source, has avoided connecing in addition that external power source and battery powered are loaded down with trivial details and inconvenient to operate, has both improved the security of using, but facilitate the use again and later maintenance.

The foregoing is merely a preferred embodiment of the utility model and is not intended to limit the utility model in any manner; those skilled in the art can make many possible variations and modifications to the disclosed solution, or to modify equivalent embodiments, without departing from the scope of the solution, using the methods and techniques disclosed above. Therefore, any simple modifications, equivalent substitutions, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention are within the scope of the technical scheme of the present invention.

Claims

1. A wireless temperature measuring device for a transformer, comprising a transformer, a detection housing (1) connected to a coil (8) of the transformer, characterized in that: the detection device comprises a detection shell (1), wherein a detection device (10) which is composed of a piezoelectric sensor (2), an energy collection chip (3), a single chip microcomputer (4), a temperature collection chip (5) and a wireless sending module (6) is fixed in the detection shell, the single chip microcomputer (4) is electrically connected with the energy collection chip (3), the temperature collection chip (5) and the wireless sending module (6) respectively, and the energy collection chip (3) is electrically connected with the piezoelectric sensor (2).

2. The wireless temperature measuring device for the transformer according to claim 1, wherein: the piezoelectric sensor (2), the energy collecting chip (3), the single chip microcomputer (4), the temperature collecting chip (5) and the wireless sending module (6) are all fixed on a circuit board (9), and the circuit board (9) is fixed on a mounting column (11) in the detection shell (1) through screws.

3. The wireless temperature measuring device for the transformer according to claim 2, wherein: the temperature acquisition chip (5) is a temperature and humidity sensor.

4. The wireless temperature measurement device for the transformer according to claim 3, wherein: the detection shell (1) is connected with a coil of the transformer through a high-temperature-resistant double-sided adhesive tape (7).

5. The wireless temperature measuring device for the transformer according to claim 1, wherein: the detection shell (1) is an insulating flame-retardant detection shell.