CN202350950U - Self-powered wireless temperature measurement device for power transmission and transformation system - Google Patents

Abstract

The utility model discloses a self-powered wireless temperature measuring device used in a power transmission and transformation system, which comprises an induction coil, a temperature sensor, an A/D conversion module, a single-chip computer and a wireless transmission module. , the induction electricity produced by the induction coil provides power for the temperature sensor, the A/D conversion module, the single-chip microcomputer and the wireless transmission module, and the temperature signal measured by the temperature sensor is passed to the single-chip microcomputer after the A/D conversion module, and the single-chip microcomputer passes the wireless transmission module Two-way communication with the outside, the wireless transmitting module is connected with an antenna. In order to achieve the purpose of low cost and high precision.

Description

Self-powered wireless temperature measuring device used in power transmission and transformation system

technical field

The utility model relates to the field of temperature measurement, in particular to a self-powered wireless temperature measurement device used in power transmission and transformation systems. the

Background technique

At present, in power transmission and transformation systems, power equipment such as current-carrying busbars and busbars will experience excessive temperature rise when the load current is too large or the surface is oxidized. If left untreated for a long time, the performance of adjacent live parts will deteriorate. Lead to breakdown, failure and power outage. According to the data analysis provided by the production safety supervision department, more than 90% of the major accidents in power transmission and transformation in the country were caused by overheating, which caused huge economic losses to production and operation, and also threatened the safety of life and property. By monitoring the operation of the temperature of busbar contacts, high-voltage cable joints, and high-voltage switch contacts, it can effectively prevent the occurrence of high-voltage transmission and substation faults, and provide effective guarantees for safe production. the

Many busbars are at high potential (6KV, 10KV, 35KV, 110KV, 220KV), and the common method of temperature monitoring is to coat a layer of luminescent material whose color changes with temperature on the surface of high-voltage electrical contact, and observe its color change to detect Roughly determine the temperature range, this method has low accuracy and poor reliability, and cannot perform quantitative measurement, and it is impossible to observe in a fully enclosed environment; another method is to use an infrared thermal imager with radiation characteristics, which has higher accuracy , but due to the need for optical devices, it is not convenient to use in specific occasions. Even if it is barely used, it will bring challenges to installation, debugging, maintenance and equipment power supply. It is difficult to implement, and the price is high, and it is difficult to promote and apply. More importantly, both of the above two methods require manual inspection, and the temperature data cannot be obtained in real time. The obtained data is always lagging behind, and the real-time temperature alarm function cannot be achieved. the

Most of the existing wireless temperature measurement systems place the temperature sensor inside the temperature measurement terminal, and each measurement point installs a temperature measurement terminal. The disadvantage of this is: the high temperature of the temperature measurement point affects the electronic The stability and service life of components are affected. Therefore, for this type of product, the temperature measurement terminal needs to be installed at a place with a certain distance from the heating point and the temperature is relatively low. Therefore, there are also temperature sensors and temperature measurement points. At a certain distance, there is an error in temperature measurement. When using, in order to reduce the temperature measurement error, the temperature sensor needs to be as close as possible to the high temperature temperature measurement point, and the data acquisition unit of the temperature measurement terminal should be as far away from the heat point as possible; at the same time, in order to reduce the installation and use cost, the number of temperature measurement terminals should be appropriately reduced , or it is advisable that each temperature measurement terminal can provide multiple sensor measurements. In addition, most of these products are powered by a built-in battery. The life of the built-in battery and the restriction of the size of the battery on the appearance of the product have more or less an impact on the product. It will become impossible to accomplish, directly affecting the normal use of the product. Through the above analysis, the existing wireless temperature measurement system has the following disadvantages: small space, linear distribution of measurement points, relatively dense measurement points, high temperature ratio of the connected part of the measured point, and high ambient temperature around the measured point. the

Utility model content

The purpose of this utility model is to propose a self-powered wireless temperature measuring device used in power transmission and transformation systems to achieve the advantages of low cost and high precision in view of the above problems. the

In order to achieve the above object, the technical solution adopted by the utility model is:

A self-powered wireless temperature measuring device used in power transmission and transformation systems, including an induction coil, a temperature sensor, an A/D conversion module, a single-chip microcomputer and a wireless transmission module, the induction coil is electromagnetically induced with a bus bar, and the temperature generated by the induction coil The induction circuit provides power for the temperature sensor, A/D conversion module, single-chip microcomputer and wireless transmission module, and the temperature signal measured by the temperature sensor is passed to the single-chip microcomputer after the A/D conversion module, and the single-chip microcomputer performs two-way communication with the outside through the wireless transmission module , the wireless transmitting module is connected with an antenna.

Further, an SPI bus is used to connect the single-chip microcomputer and the wireless transmitting module. the

Further, the induction coil is an autotransformer. the

Further, the iron core of the autotransformer adopts an iron core without openings. the

Further, it also includes an outer shell and an inner shell, the outer shell and the inner shell form a hollow ring, and an induction coil, an A/D conversion module, a single-chip microcomputer and a wireless transmission module are arranged between the outer shell and the inner shell, and the temperature The sensor passes through the small hole on the inner shell and is electrically connected to the induction coil. the

Further, multiple temperature sensors can be provided. the

Further, the temperature sensor adopts a ceramic package. the

The technical scheme of the utility model separates the temperature sensor from the data acquisition circuit, and uses an induction coil to provide power for the temperature sensor and the data acquisition circuit. Because the temperature sensor is separated from the data acquisition circuit, it can ensure that the temperature sensor is close enough to the busbar. At the same time, the electronic components of the data acquisition circuit are not affected, thereby improving the accuracy of the temperature measuring device, and the conventional electronic circuit design is adopted to reduce the cost. The use of induction coil power supply avoids the limitation of battery power supply on the shape of the temperature measuring device, so that the temperature measuring device can be more flexibly applied to various closed power transmission boxes. the

Other features and advantages of the present invention will be set forth in the following description, and, in part, will be apparent from the description, or can be learned by practicing the present invention. The objectives and other advantages of the utility model will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings. the

The technical solutions of the present utility model will be further described in detail through the drawings and embodiments below. the

Description of drawings

The accompanying drawings are used to provide a further understanding of the utility model, and constitute a part of the description, and are used to explain the utility model together with the embodiments of the utility model, and do not constitute a limitation to the utility model. In the attached picture:

Fig. 1 is a working principle diagram of the self-powered wireless temperature measuring device used in the power transmission and transformation system described in the embodiment of the present invention;

Fig. 2 is a schematic structural diagram of a self-powered wireless temperature measuring device used in a power transmission and transformation system according to an embodiment of the present invention;

Fig. 3 is a diagram of the use state of the self-powered wireless temperature measuring device used in the power transmission and transformation system shown in Fig. 2;

Fig. 4 is a side view of the self-powered wireless temperature measuring device used in the power transmission and transformation system shown in Fig. 3 .

In conjunction with the accompanying drawings, reference signs are as follows in the utility model embodiment:

1-outer shell; 2-induction coil; 3-inner shell; 4-temperature sensor; 5-data acquisition circuit; 6-busbar.

Detailed ways

The preferred embodiments of the present utility model are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present utility model, and are not intended to limit the present utility model. the

As shown in Figure 1, a self-powered wireless temperature measuring device used in power transmission and transformation systems includes an induction coil, a temperature sensor, an A/D conversion module, a single-chip microcomputer and a wireless transmission module, and the induction coil is electromagnetically induced by the bus bar. The induction electricity generated by the induction coil provides power for the temperature sensor, A/D conversion module, single-chip microcomputer and wireless transmission module. The temperature signal measured by the temperature sensor is transmitted to the single-chip microcomputer through the A/D conversion module. Two-way communication, the wireless transmitting module is connected with an antenna. SPI bus connection is adopted between the single chip microcomputer and the wireless transmitting module. The induction coil is an autotransformer. The iron core of the autotransformer adopts an iron core without openings. the

As shown in Figure 2, the wireless temperature measuring device also includes an outer shell 1 and an inner shell 3, the outer shell 1 and the inner shell 3 form a hollow ring, and an induction coil 2, an A/D The conversion module, the single-chip microcomputer and the wireless transmitting module, the temperature sensor 4 pass through the small hole on the inner shell 3, and are electrically connected to the induction coil 2. A plurality of temperature sensors can be arranged on one wireless temperature measuring device, and the temperature sensor 4 adopts a ceramic package. A/D conversion module, single-chip microcomputer and wireless transmission module form data acquisition circuit 5. 

The specific installation is as follows:

The wireless temperature measuring device connects the multi-channel temperature sensor and the data acquisition device through the data line, both of which are made of corrosion-resistant, high- and low-temperature-resistant materials, which can adapt to the needs of the environment. The equipment is installed on the high-voltage busbar 6, and the busbar 6 is in a linear direction, and the temperature measurement terminals are arranged along with the busbar. When the equipment is working, since there is current flowing through the busbar 6, the self-coupling transformer installed around the busbar 6 uses the principle of electromagnetic induction to convert the magnetic field generated by the busbar 6 into electric energy for power supply to the temperature measurement terminal. The temperature analog signal collected by each temperature sensor is sent to the data processing device, and the digital signal is sent to the single chip microcomputer for processing through the A/D (digital/analog) conversion chip, and uploaded to the host computer through the wireless transmitting chip. The wireless temperature measurement device can form a short-range wireless network distributed on three parallel busbars, and can transmit data from one end of the tunnel to the other. Thousands of such wireless temperature measurement terminals can exist in the same network at the same time. During installation, a wireless temperature measuring device can have 10 temperature sensors, which are respectively arranged on both sides of the terminal, with 5 sensors on each side, symmetrical on both sides. The temperature measurement terminal adopts a self-coupling transformer, which converts the electromagnetic field generated by the busbar 6 into the electric energy required by the temperature measurement terminal. The equipment size can be specially designed according to the width of the busbar. The length of each temperature sensor is different, and the five sensors on each side are lengthened sequentially.

To sum up, the utility model has the following beneficial effects: 1. The iron core does not open, so as to reduce the influence of harmonics on the wireless temperature measurement terminal;

2. The temperature sensor is packaged in ceramics, which is pressure-resistant, high-temperature resistant, and has good heat conduction. It can connect multiple sensors, simplify equipment, and improve use efficiency.

Finally, it should be noted that: the above is only a preferred embodiment of the utility model, and is not intended to limit the utility model, although the utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art , it is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model. the

Claims (7)

1. self-power wireless temperature measuring equipment that is used for power transmission and transformation system; It is characterized in that; Comprise inductive coil, temperature sensor, A/D modular converter, single-chip microcomputer and wireless transmitter module; Said inductive coil and bus row electromagnetic induction, the induced electricity that inductive coil produces is that temperature sensor, A/D modular converter, single-chip microcomputer and wireless transmitter module provide power supply, the temperature signal that said temperature sensor records passes to single-chip microcomputer behind the A/D modular converter; Single-chip microcomputer carries out two-way communication through wireless transmitter module and outside, is connected with antenna on the said wireless transmitter module.

2. the self-power wireless temperature measuring equipment that is used for power transmission and transformation system according to claim 1 is characterized in that, adopts spi bus to be connected between said single-chip microcomputer and the wireless transmitter module.

3. the self-power wireless temperature measuring equipment that is used for power transmission and transformation system according to claim 1 and 2 is characterized in that said inductive coil is an autotransformer.

4. the self-power wireless temperature measuring equipment that is used for power transmission and transformation system according to claim 3 is characterized in that the iron core of said autotransformer adopts the not iron core of opening.

5. the self-power wireless temperature measuring equipment that is used for power transmission and transformation system according to claim 1 and 2; It is characterized in that; Also comprise shell (1) and inner casing (3), said shell (1) and inner casing (3) are formed the annulus of a hollow, between shell (1) and inner casing (3), are provided with inductive coil (2), A/D modular converter, single-chip microcomputer and wireless transmitter module; Said temperature sensor (4) passes the aperture on the inner casing (3), is connected electrically on the inductive coil (2).

6. the self-power wireless temperature measuring equipment that is used for power transmission and transformation system according to claim 1 and 2 is characterized in that said temperature sensor (4) can be provided with a plurality of.

7. the self-power wireless temperature measuring equipment that is used for power transmission and transformation system according to claim 1 and 2 is characterized in that, said temperature sensor (4) adopts ceramic package.

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