CN212622879U - Detection apparatus based on CT gets electric coil - Google Patents
Detection apparatus based on CT gets electric coil Download PDFInfo
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- CN212622879U CN212622879U CN202021777265.XU CN202021777265U CN212622879U CN 212622879 U CN212622879 U CN 212622879U CN 202021777265 U CN202021777265 U CN 202021777265U CN 212622879 U CN212622879 U CN 212622879U
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Abstract
The utility model discloses a detection apparatus based on CT gets electric coil, constitute including energy storage module, power management module, temperature detection module, non-temperature detection module and wireless transmission module etc.. The utility model discloses a based on CT gets detection device of electric coil, adopt CT (current transformer) to get the electric mode and give the device power supply, carry out real-time on-line monitoring such as ultraviolet ray, temperature go on, current detection to important electrical contacts such as power switch cabinet, block terminal, busbar, switch that converges to give backstage monitoring software through wireless mode with measured data transmission, monitoring software reports to the police according to ultraviolet intensity, the temperature variation trend of gathering and reminds.
Description
[ technical field ] A method for producing a semiconductor device
The utility model relates to a detection device technical field specifically is a detection device based on electric coil is got to CT.
[ background of the invention ]
At present, the existing detection device has the following defects:
1. the power supply mode comprises the following steps:
the method comprises the following steps of: batteries are replaced every few years;
radio Frequency (RF) power: identifying that the distance is short;
2. the measurement is single: at present, only the temperature of a node is detected, and the current flowing by key factors causing heating is not detected. The alarm is given as long as the temperature rises regardless of the magnitude or the magnitude of the current flowing through the joint, so that the maintenance workload of field maintainers is increased;
3. the real-time property is poor: by adopting a battery power supply mode, in order to ensure that the battery can be normally used for more than several years, the measurement data can be sent only at low frequency (once every ten minutes), so that the continuity of the measurement data is poor;
4. poor anti-interference capability: due to the fact that the sending frequency of data is low, false alarm can be caused once interference alarm data appears once in the midway of receiving; if the interfered data packet is lost once and an alarm is given again, the report is missed.
[ Utility model ] content
In order to solve the above problem, the utility model provides a following technical scheme: (ii) a
The utility model provides a detection device based on CT gets electric coil which characterized in that:
the device comprises an energy storage module, a power management module, a temperature detection module, a non-temperature detection module and a wireless transmission module;
the energy storage module comprises a CT electricity taking coil, a full-bridge rectifier and an energy storage capacitor, wherein the CT electricity taking coil, the full-bridge rectifier and the energy storage capacitor are sequentially connected;
the power management module is low in power consumption and comprises an LDO power supply and a hysteresis comparator; the energy storage capacitor is respectively connected with the LDO power supply and the hysteresis comparator, and the LDO power supply is connected with the hysteresis comparator; the LDO power supply is connected with the wireless MCU;
the temperature detection module comprises a temperature sensor and a wireless MCU, and the temperature sensor is connected with the wireless MCU;
the wireless transmission module comprises a wireless MCU and a receiving device, and the wireless MCU is connected with the receiving device in a wireless mode.
Further, the non-temperature detection module is a current detection module; the current detection module comprises a Rogowski current mutual inductor, a low-noise amplifier, a voltage reference and a wireless MCU (microprogrammed control unit); the Rogowski current mutual inductor is connected with the low-noise amplifier, and the low-noise amplifier is respectively connected with the voltage reference and the wireless MCU.
Further, the non-temperature detection module is an ultraviolet detection module; the ultraviolet detection module comprises an ultraviolet sensor, a low-noise amplifier, a comparator and a wireless MCU; the ultraviolet sensor is connected with the low-noise amplifier, the low-noise amplifier is respectively connected with the comparator and the wireless MCU, and meanwhile the comparator is connected with the wireless MCU.
The utility model discloses a based on CT gets detection device of electric coil, adopt CT (current transformer) to get the electric mode and give the device power supply, carry out real-time on-line monitoring such as ultraviolet ray, temperature go on, current detection to important electrical contacts such as power switch cabinet, block terminal, busbar, switch that converges to give backstage monitoring software through wireless mode with measured data transmission, monitoring software reports to the police according to ultraviolet intensity, the temperature variation trend of gathering and reminds.
The device has the following technical advantages:
1. the CT power taking coil is adopted, and an additional disposable battery is not needed, so that the service life is long;
2. the CT power-taking coil magnetic ring adopts soft permalloy with high magnetic conductivity and low saturation magnetic induction intensity, and the device has the characteristics of small starting current (3A) and no heat generation;
3. the Rogowski current mutual inductor is adopted to measure the current, and the characteristic of wide current measurement range (10A-1500A) is achieved;
4. the node is subjected to comprehensive detection of temperature and current or ultraviolet rays at the same time, and a comprehensive basis is provided for alarming of a temperature measuring point;
5. the installation is convenient, and the electric clearance and the creepage distance are not damaged.
6. The real-time property is good, and the wireless data transmission frequency is automatically adjusted within the range of 2 s-60 s according to the current;
7. direct measurement, the device and the heating element are in direct contact measurement, and the measurement precision is high; .
[ description of the drawings ]
FIG. 1 is a flow chart of the linking relationship between the functional modules of the current detection of the present invention;
FIG. 2 is a flow chart of the linking relationship between the functional modules for ultraviolet detection according to the present invention;
fig. 3 is a circuit diagram of the energy storage module of the present invention;
fig. 4 is a circuit diagram of the current sampling circuit of the present invention;
FIG. 5 is a circuit diagram of the ultraviolet detection of the present invention;
FIG. 6 is a circuit diagram of the current and temperature sampling wireless transmission of the present invention;
[ detailed description ] embodiments
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
The utility model provides a detection device based on CT gets electric coil which characterized in that:
the device comprises an energy storage module, a power management module, a temperature detection module, a non-temperature detection module and a wireless transmission module;
the energy storage module comprises a CT electricity taking coil, a full-bridge rectifier and an energy storage capacitor, wherein the CT electricity taking coil, the full-bridge rectifier and the energy storage capacitor are sequentially connected;
the power management module is low in power consumption and comprises an LDO power supply and a hysteresis comparator; the energy storage capacitor is respectively connected with the LDO power supply and the hysteresis comparator, and the LDO power supply is connected with the hysteresis comparator; the LDO power supply is connected with the wireless MCU;
the temperature detection module comprises a temperature sensor and a wireless MCU, and the temperature sensor is connected with the wireless MCU;
the wireless transmission module comprises a wireless MCU and a receiving device, and the wireless MCU is connected with the receiving device in a wireless mode.
Further, the non-temperature detection module is a current detection module; the current detection module comprises a Rogowski current mutual inductor, a low-noise amplifier, a voltage reference and a wireless MCU (microprogrammed control unit); the Rogowski current mutual inductor is connected with the low-noise amplifier, and the low-noise amplifier is respectively connected with the voltage reference and the wireless MCU.
Further, the non-temperature detection module is an ultraviolet detection module; the ultraviolet detection module comprises an ultraviolet sensor, a low-noise amplifier, a comparator and a wireless MCU; the ultraviolet sensor is connected with the low-noise amplifier, the low-noise amplifier is respectively connected with the comparator and the wireless MCU, and meanwhile the comparator is connected with the wireless MCU.
Working principle of current detection device
(1) Energy storage process
When the current flowing through the static contact of the switch cabinet exceeds 3A, the induced current of the CT power taking coil and the uA level charges the energy storage capacitor after full-bridge rectification. When the current is lower than 3A, the induced current of the CT power-taking coil is only enough to maintain the internal loss of the device.
(2) Discharge process
A hysteresis comparator U6 in a power management module (low power consumption) compares the voltage of an energy storage capacitor with the upper limit threshold voltage of 4.2V, when the voltage of the energy storage capacitor exceeds 4.2V, a power supply chip U5 is enabled to output stable 3.3V, a wireless MCU (CC1310) U2 starts to sample and calculate the current and the temperature, and sends out data in a wireless mode, and the wireless MCU automatically enters a 2s sleep mode after finishing a series of operations and then wakes up again. If the voltage of the energy storage capacitor is lower than the lower limit threshold voltage by 3.0V in the operation process, the hysteresis comparator closes the power output and continuously stores energy until the voltage exceeds the upper limit threshold voltage.
(3) Current sensing
The current at the joint is detected through the Rogowski current mutual inductance coil, when the current flows through the joint, the Rogowski current mutual inductance coil can output a weak sine wave signal, the weak sine wave signal is sent to the MCU through the low-noise amplification U3 circuit, and the MCU obtains a corresponding current value through calculation;
(4) temperature detection
Because the resistance value of the NTC is in a linear state along with the change of the temperature, the MCU obtains the current temperature value by sampling and calculating the resistance value of the NTC;
(5) wireless transmission
After the current value and the temperature are sampled and calculated, the wireless MCU U2 packs the data into a complete data frame format and transmits the data frame format to the receiving device in a wireless mode. After the transmission is finished, the MCU immediately enters a low power consumption mode, and the energy consumption is reduced.
Working principle of ultraviolet detection device
(1) Energy storage process
When the current flowing through the static contact of the switch cabinet exceeds 3A, the induced current of the CT power taking coil and the uA level charges the energy storage capacitor after full-bridge rectification. When the current is lower than 3A, the induced current of the CT power-taking coil is only enough to maintain the internal loss of the device.
(2) Discharge process
A hysteresis comparator U6 in a power management module (low power consumption) compares the voltage of an energy storage capacitor with the upper limit threshold voltage of 4.2V, when the voltage of the energy storage capacitor exceeds 4.2V, a power supply chip U5 is enabled to output stable 3.3V, a wireless MCU (CC1310) U2 starts to sample and calculate the current and the temperature, and sends out data in a wireless mode, and the wireless MCU automatically enters a 2s sleep mode after finishing a series of operations and then wakes up again. If the voltage of the energy storage capacitor is lower than the lower limit threshold voltage by 3.0V in the operation process, the hysteresis comparator closes the power output and continuously stores energy until the voltage exceeds the upper limit threshold voltage.
(3) Ultraviolet detection
When the ultraviolet sensor detects an ultraviolet spectrum of 220 nm-350 nm, a current signal is generated according to the ultraviolet intensity, the current is denoised and amplified by U4 and then converted into a voltage signal, the voltage signal is divided into two paths, and one path directly enters an ADC (analog to digital converter) acquisition channel of the wireless MCU; and the other path of the signal is connected to the input end of the comparator and is compared with a set threshold value, if the signal exceeds the threshold value, the comparator outputs a high-level signal to forcibly awaken the wireless MCU, and the sampling information is transmitted in time.
(4) Temperature detection
Because the resistance value of the NTC is in a linear state along with the change of the temperature, the ADC channel of the wireless MCU directly carries out AD sampling and calculation on the resistance value of the NTC to obtain a current temperature value;
(5) wireless transmission
After sampling calculation of ultraviolet intensity, temperature, interrupt information and the like is completed, the wireless MCU U2 packs data into a complete data frame format and transmits the data frame format to the receiving device in a wireless mode. After the transmission is finished, the MCU immediately enters a low power consumption mode, and the energy consumption is reduced.
The following are experimental measurement data:
1. measuring consistency and accuracy of temperature sensors
2. Measuring current measurement consistency and accuracy of a temperature sensor
3. High and low temperature environment test of temperature sensor
4. Wireless transmission distance testing
5. Normal temperature CT electricity getting effect test
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (5)
1. The utility model provides a detection device based on CT gets electric coil which characterized in that:
the device comprises an energy storage module, a power management module, a temperature detection module, a non-temperature detection module and a wireless transmission module;
the energy storage module comprises a CT electricity taking coil, a full-bridge rectifier and an energy storage capacitor, wherein the CT electricity taking coil, the full-bridge rectifier and the energy storage capacitor are sequentially connected;
the power management module is low in power consumption and comprises an LDO power supply and a hysteresis comparator; the energy storage capacitor is respectively connected with the LDO power supply and the hysteresis comparator, and the LDO power supply is connected with the hysteresis comparator; the LDO power supply is connected with the wireless MCU;
the temperature detection module comprises a temperature sensor and a wireless MCU, and the temperature sensor is connected with the wireless MCU;
the wireless transmission module comprises a wireless MCU and a receiving device, and the wireless MCU is connected with the receiving device in a wireless mode.
2. The detection device based on the CT electricity-taking coil as claimed in claim 1, wherein: the non-temperature detection module is a current detection module.
3. The detection device based on the CT electricity-taking coil is characterized in that: the current detection module comprises a Rogowski current mutual inductor, a low-noise amplifier, a voltage reference and a wireless MCU (microprogrammed control unit); the Rogowski current mutual inductor is connected with the low-noise amplifier, and the low-noise amplifier is respectively connected with the voltage reference and the wireless MCU.
4. The detection device based on the CT electricity-taking coil as claimed in claim 1, wherein: the non-temperature detection module is an ultraviolet detection module.
5. The detection device based on the CT electricity-taking coil is characterized in that: the ultraviolet detection module comprises an ultraviolet sensor, a low-noise amplifier, a comparator and a wireless MCU; the ultraviolet sensor is connected with the low-noise amplifier, the low-noise amplifier is respectively connected with the comparator and the wireless MCU, and meanwhile the comparator is connected with the wireless MCU.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021777265.XU CN212622879U (en) | 2020-08-21 | 2020-08-21 | Detection apparatus based on CT gets electric coil |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021777265.XU CN212622879U (en) | 2020-08-21 | 2020-08-21 | Detection apparatus based on CT gets electric coil |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113406416A (en) * | 2021-06-11 | 2021-09-17 | 国网江苏省电力有限公司电力科学研究院 | Performance detection system of micro-power current power taking device for power transmission and transformation equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113406416A (en) * | 2021-06-11 | 2021-09-17 | 国网江苏省电力有限公司电力科学研究院 | Performance detection system of micro-power current power taking device for power transmission and transformation equipment |
| CN113406416B (en) * | 2021-06-11 | 2023-03-24 | 国网江苏省电力有限公司电力科学研究院 | Performance detection system of micro-power current power taking device for power transmission and transformation equipment |
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