CN210780772U - Power grid electricity testing device - Google Patents
Power grid electricity testing device Download PDFInfo
- Publication number
- CN210780772U CN210780772U CN201922413032.5U CN201922413032U CN210780772U CN 210780772 U CN210780772 U CN 210780772U CN 201922413032 U CN201922413032 U CN 201922413032U CN 210780772 U CN210780772 U CN 210780772U
- Authority
- CN
- China
- Prior art keywords
- module
- antenna
- induced voltage
- voltage
- radio frequency
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Near-Field Transmission Systems (AREA)
Abstract
The utility model provides a power grid electricity testing device, which comprises an antenna (1) for data communication, a radio frequency channel module (2), a modulation/demodulation module (3), an isolation module (4), a bypass module (50) and an induced voltage processing module (20); the isolation module (4) is positioned between the antenna (1) and the radio frequency channel module (2) and is used for inhibiting the power frequency voltage induced on the antenna (1) or the communication configuration signal from the antenna (1) from being transmitted to the radio frequency channel module (2); one end of the bypass module (50) is directly connected with the antenna (1), the other end of the bypass module is connected with the induced voltage processing module (20), the power frequency voltage induced on the antenna (1) is sent to the induced voltage processing module (20) through the bypass module (50), and the induced voltage processing module (20) comprises an induced voltage detection circuit and an induced voltage release circuit. The induction voltage is used for carrying out live detection and is prevented from puncturing the front end circuit of the Internet of things.
Description
Technical Field
The utility model relates to an electric power thing networking field especially relates to a power grid electricity measuring device.
Background
In power grid monitoring, in order to grasp the working state of a specific part of a power grid, for example, to determine the power failure position of the power grid, it is necessary to remotely detect whether equipment, components, power transmission lines, and the like in power transmission, power transformation, and power distribution networks are electrified.
Whether a particular part of the grid is live or not can be achieved in a number of ways, such as voltage measurement, current measurement and electric field measurement.
The electric field measurement has the characteristics of non-contact and simple and flexible arrangement, and is a technical direction with application prospect.
The existing live detection technology adopts an electric field measurement scheme, and common equipment is a near-electricity alarm, also called a watch near-electricity alarm, a near-electricity alarm meter, an electricity testing meter and an electricity testing watch. The near-electricity alarm has the functions of time counting and generating sound alarm by non-contact sensing of an electric field. When the near-electricity alarm enters the electrified zone, the near-electricity alarm can send out continuous sound alarm signals in time to remind operating personnel of paying attention to danger and prevent electric shock casualty accidents.
The near-electricity alarm can be used for temporarily detecting whether a live wire with the alternating current of more than 100V is electrified or not under the condition of not contacting with a lead. And the power-off point of the whole line can be detected on one section of conducting wire. The near-electricity alarm carries out front-end analysis processing on a received monitoring signal, takes out a 50HZ power frequency signal, eliminates an interference signal through digital filtering, analyzes the signal intensity, sends out a wireless alarm signal to a receiving end when reaching a preset value, the receiving end gives an alarm after receiving the signal, and prompts user equipment to approach strong electricity, safety attention is paid, an early warning system only carries out early warning on the voltage of the power frequency 50-60HZ above 220V, and a circuit is anti-interference, stable and reliable through digital filtering, and special attention is paid: the near-electric induction alarm does not give early warning to direct current, high frequency and static electricity, and because the stability and detection sensitivity of an electric field around the overhead single line is high, the near-electric induction alarm is mainly used for detecting outdoor overhead lines, and the detected voltage can be adjusted within a certain limit during production of equipment as required.
In addition, from the scene of the application of the power internet of things, the front end of the power internet of things for power grid monitoring data acquisition and data radio transmission is installed on a power transmission line, a power transmission line connecting hardware fitting or a power distribution cabinet plug socket and the like, and the installation positions enable a radio antenna contained in a radio transmission circuit to be close to a high-voltage conductor in space, so that a high-voltage electrified body induces a strong 50Hz power frequency voltage on the radio antenna, and the voltage can damage the radio transmission circuit.
The electric power thing networking front end is laid outdoor usually, in order to guarantee radio transmission circuit's life and reliability, must encapsulate electric power thing networking front end circuit in the sealed casing, and this sealed casing neither influences the antenna that radio transmission circuit contains and receives and the transmission signal, can provide environmental protection for electric power thing networking front end circuit again. In order to ensure high sealing of the sealed shell, it is necessary to avoid the arrangement of an external lead interface on the sealed shell, and how to input configuration data or input a wake-up signal to the radio transmission circuit to wake up the radio transmission circuit to enter a working state in the debugging and installation processes without the arrangement of the external lead interface is a problem to be solved.
In the field of patent applications, the following techniques for processing the grid induced voltage have emerged:
the patent application with the application number of CN201710477620.8 and the name of 'a protection circuit suitable for a radio frequency receiving front end of a noise coefficient analyzer' provides a protection circuit for processing 50Hz/110V power frequency induction voltage at the front end of a measuring instrument, and the protection circuit comprises: the device consists of an input capacitor, an output capacitor, a parallel positive and negative connection amplitude limiting diode pair and an 1/4 wavelength transmission line; the input capacitor, the 1/4 wavelength transmission line and the output capacitor are sequentially connected in series, the limiting diode is connected between the common point of the input capacitor and the 1/4 wavelength transmission line and the ground potential in a positive mode, and the limiting diode is connected between the common point of the 1/4 wavelength transmission line and the output capacitor and the ground potential in a reverse mode. The protection circuit can simultaneously inhibit a 50Hz/110V power frequency induction voltage signal and a high-power radio frequency microwave measurement signal output by a measured piece, improves performance indexes of port matching and transmission loss of the whole radio frequency front-end protection circuit device, and is positioned at the foremost end of a radio frequency receiving circuit.
The problem to be solved is that the protection circuit is suitable for the radio frequency receiving front end of the noise coefficient analyzer: when the tested piece and the noise coefficient analyzer are not well grounded, or when a user uses an electric soldering iron which is not well grounded for welding debugging during testing, and the like, a power frequency induction voltage of 50Hz/110V can be generated at a receiving port of the noise coefficient analyzer, and the power of the induction voltage is nearly 100dB higher than the maximum receivable signal power of the port of the noise coefficient analyzer. Because the lowest working frequency of the radio frequency front end of the noise coefficient analyzer is low (usually 10MHz), and the capacitance value of the blocking capacitor at the forefront end is large, the attenuation of the power frequency induction voltage signal is limited, and the power frequency voltage signal leaked to the input end of the low-noise high-gain amplification circuit module can still burn the amplifier module.
The invention has the application number of CN201710657161.1, and the invention provides a signal conditioning protection device and a method for a partial discharge ultrahigh frequency sensor, which comprises the following steps: the device comprises an induction voltage protection module, a radio frequency module, an overvoltage pulse absorption module, a first capacitor and a radio frequency interference suppression module, wherein one end of the induction voltage protection module is connected with the radio frequency module, the radio frequency module is used for receiving a preliminary radio frequency signal, the induction voltage module is used for discharging induction voltage, and the other end of the induction voltage module is grounded;
one end of the overvoltage pulse absorption module is connected with the radio frequency module, and the overvoltage pulse absorption module is used for weakening a high-voltage pulse signal in the preliminary radio frequency signal;
the other end of the overvoltage pulse absorption module is connected with the first capacitor, a first port of the radio frequency interference suppression module is connected with the first capacitor, the radio frequency interference suppression module is used for removing noise in the radio frequency signals, and a second port of the radio frequency interference suppression module is grounded.
The signal regulating and protecting device and method for partial discharge ultrahigh frequency sensor solves the problem that the induction voltage of large bandwidth (higher harmonic of 50Hz power frequency) is restrained at the front section of partial discharge detection.
In the prior art, a power frequency protection circuit adopted at the front end of the measuring instrument and a broadband interference suppression circuit adopted in partial discharge detection are not suitable for protecting power frequency voltage induced by a radio antenna required by a radio transmission circuit, and a method for inputting configuration data or inputting a wake-up signal to the radio transmission circuit in a sealed shell under the condition of not using an external lead interface is also lacked in the prior art.
Disclosure of Invention
The utility model provides a power grid electricity measuring device for overcome current nearly electric alarm can not the teletransmission data, can not organically fuse with the thing networking front end, can not be arranged in the long-term fixed point monitoring under the outdoor environment at least one in these shortcomings.
The utility model provides a pair of electric installation is surveyed to electric wire netting contains antenna (1) that is used for data communication, radio frequency channel module (2), modulation/demodulation module (3), its characterized in that:
the device also comprises an isolation module (4), a bypass module (50) and an induced voltage processing module (20); wherein the content of the first and second substances,
the isolation module (4) is positioned between the antenna (1) and the radio frequency channel module (2) and is used for inhibiting the power frequency voltage induced on the antenna (1) or the communication configuration signal from the antenna (1) from being transmitted to the radio frequency channel module (2);
one end of the bypass module (50) is directly connected with the antenna (1), the other end of the bypass module is connected with the induced voltage processing module (20), the power frequency voltage induced on the antenna (1) is sent to the induced voltage processing module (20) through the bypass module (50), and the induced voltage processing module (20) comprises an induced voltage detection circuit and an induced voltage release circuit.
The utility model discloses concrete embodiment provides a power grid electricity measuring device can overcome current nearly electric alarm and can not the teletransmission data, can not fuse with the thing networking front end organic, can not be arranged in outdoor environment under for a long time at least one of these shortcomings of fixed point monitoring. The device is integrally realized with the front end of the Internet of things, the induction voltage is used for carrying out live detection, and is prevented from puncturing the front end circuit of the Internet of things, the device can work outdoors for a long time, and electric field data can be collected and transmitted in real time.
Other features and advantages of the present invention will be set forth in the description that follows.
Drawings
Fig. 1 is a schematic diagram of a radio transmission circuit with an antenna additional channel according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a power grid electricity measuring device according to an embodiment of the present invention.
In the figure, 1, an antenna; 2. a radio frequency channel module; 3. a modulation/demodulation module; 4. an isolation module; 5. a bypass module; 6. an induced voltage release module; 7. a configuration data receiving module; 8. a ground wire; 9. a power line; 10. a radio transmission circuit; 11. a wake-up module; 12. a power frequency induction protection channel; 13. a channel is awakened; 14. configuring a data receiving channel;
20. an induced voltage processing module; 30. a power frequency induced voltage channel; 50. and a bypass module.
Detailed Description
The utility model discloses concrete embodiment provides a power grid electricity measuring device can overcome current nearly electric alarm and can not the teletransmission data, can not fuse with the thing networking front end organic, can not be arranged in outdoor environment under for a long time at least one of these shortcomings of fixed point monitoring.
The utility model discloses a power grid electricity measuring device that embodiment of the invention provided adds the description in embodiment two.
Furthermore, in the specific implementation manner of the present invention, referring to the first embodiment, an example of a radio transmission circuit with an antenna additional channel is further provided for overcoming at least one of the defects of complicated structure, complex operation and poor reliability of the existing power switch operating device. The capability of the wireless transmission circuit for inhibiting power frequency induction voltage is improved, and convenience of data configuration and awakening in the initial installation and production debugging process is guaranteed.
Example one is used for illustration: besides being used for realizing power grid electricity detection, the radio antenna at the front end of the Internet of things can also realize more functions.
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.
The following describes the composition and operation of the present invention with reference to the accompanying drawings.
Example of a radio Transmission Circuit with an additional channel for an antenna
The utility model provides a pair of radio transmission circuit with antenna additional channel, it is shown with reference to fig. 1, contain antenna (1) that is used for data communication, radio frequency channel module (2), modulation/demodulation module (3), its characterized in that:
the device also comprises an isolation module (4), a bypass module (5) and an induced voltage release module (6); wherein the content of the first and second substances,
the isolation module (4) is positioned between the antenna (1) and the radio frequency channel module (2) and is used for inhibiting the power frequency voltage induced on the antenna (1) or the communication configuration signal from the antenna (1) from being transmitted to the radio frequency channel module (2);
one end of the bypass module (5) is directly connected with the antenna (1), the other end of the bypass module is connected with the power frequency induction voltage release module (6), and the power frequency voltage induced on the antenna (1) is released through the bypass module (5), the power frequency induction voltage release module (6) and a power line or a ground wire (8) of the radio transmission circuit (10); and/or
One end of the bypass module (5) is directly connected with the antenna (1), and the other end of the bypass module is connected with at least one of the configuration data receiving module (7) and the awakening module (11); the communication configuration signal is sent to a configuration data receiving module (7) through an antenna (1) and a bypass module (5);
the earth (8) of the radio transmission circuit (10) is electrically connected to the transmission conductor to ensure that the earth (8) is at the same potential as the transmission conductor.
Further, the wake-up signal is sent to the wake-up module (11) through the antenna (1) and the bypass module (5).
The circuit shown in fig. 1, comprising:
the device comprises an isolation module (4) and at least one antenna additional channel in a power frequency induction protection channel (12), a wake-up channel (13) and a configuration data receiving channel (14); wherein the content of the first and second substances,
the isolation module (4) is used for inhibiting any one of a power frequency induction signal, a communication configuration signal and a wake-up signal from being transmitted to the radio frequency channel module from the antenna;
the power frequency induction protection channel (12) is used for releasing power frequency induction voltage induced on the antenna from a specific position on a connecting line between the isolation module (4) and the antenna (1) to a power line (9) and a ground line (8);
a wake-up channel (13) from a specific location on the connection between the isolation module (4) and the antenna (1) to a wake-up channel of the wake-up module (11), using said wake-up channel to wake-up the radio transmission circuit using said antenna;
-a configuration data reception channel (14) from a specific location on the connection between the isolation module (4) and the antenna (1) to a configuration data reception channel of a configuration data reception module (7), using said configuration data reception channel to configure operating parameters for a radio transmission circuit using said antenna.
The radio transmission circuit (10) is suitable for the wireless transmission of data in transmission and distribution networks.
The radio transmission circuit (10) uses the antenna (1) for receiving or transmitting radio signals;
the transmission conductor is a transmission line or hardware contained in a plug and a socket in a transmission/distribution network.
Referring to fig. 1, an antenna (1) is connected with one end of an isolation module (4) through an antenna feeder line in a radio frequency manner, the other end of the isolation module (4) is connected with a radio frequency channel module (2) in a radio frequency manner, and the radio frequency channel module (2) is electrically connected with a modulation/demodulation module (3);
the antenna (1) transmits the received radio frequency communication signal with the carrier frequency f1 to the radio frequency channel module (2) through the isolation module (4);
the radio frequency channel module (2) comprises the following units:
a radio frequency Power Amplifier (PA) unit, a radio frequency Low Noise Amplifier (LNA) unit and a transmitting-receiving isolating switch which work in a time division duplex mode; or
A radio frequency Power Amplifier (PA) unit, a radio frequency Low Noise Amplifier (LNA) unit and a transceiving duplexer which work in a frequency division duplex mode; or
A radio frequency Power Amplifier (PA) unit; or
A radio frequency Low Noise Amplifier (LNA) unit.
The radio frequency Low Noise Amplifier (LNA) unit is electrically connected with the modulation/demodulation module (3), amplifies a radio frequency signal received by the radio frequency Low Noise Amplifier (LNA) unit and then sends the amplified radio frequency signal to the frequency conversion unit, and the frequency conversion unit down-converts the radio frequency signal and then sends the amplified radio frequency signal to a demodulator contained in the modulation/demodulation module (3);
the radio frequency Power Amplifier (PA) unit is electrically connected with the modulation/demodulation module (3), receives a modulated signal from a modulator contained in the modulation/demodulation module (3) through an up-converter, amplifies the signal and then sends the amplified signal to the antenna (1);
the modulation/demodulation module (3) includes at least one of a modulator and a demodulator.
The carrier frequency f1 takes a value in the range of 100MHz to 80 GHz;
typically, carrier frequency f1 takes on values in the range of 200MHz to 6 GHz.
As a specific implementation, the carrier frequency f1 takes a value in the range of 2GHz to 6 GHz.
The isolation module (4) inhibits the transmission of a 50Hz power frequency signal induced on the antenna (1) to the radio frequency channel module (2) so as to prevent the signal from breaking through a circuit contained in the radio transmission circuit (10); in particular to prevent the signal from breaking through the circuits contained in the radiofrequency channel module (2);
the isolation module (4) inhibits the configuration signal of the radio transmission circuit (10) with the frequency f2 received by the antenna (1) from being transmitted to the radio frequency channel module (2), and the configuration signal of the radio transmission circuit (10) is sent to the configuration data receiving module (7) through the bypass module (5).
The configuration signal carries configuration data of the radio transmission circuit (10), the configuration data of the radio transmission circuit (10) comprising: the ID of the radio transmission circuit (10) or the ID of a device where the radio transmission circuit is located, and the work cycle of data transmitted by the radio transmission circuit (10); an alarm threshold value of the radio transmission circuit (10).
In particular, the frequency f2 takes values in the range of 10kHz to 1000 kHz.
Further, the frequency f2 is a pulse frequency.
The isolation module (4) inhibits the wake-up signal of the radio transmission circuit (10) with the frequency f3 received by the antenna (1) from being transmitted to the radio frequency channel module (2), and the wake-up signal of the radio transmission circuit (10) is sent to the wake-up module (11) through the bypass module (5); or
The isolation module (4) inhibits the wake-up signal of the radio transmission circuit (10) with the frequency f2 received by the antenna (1) from being transmitted to the radio frequency channel module (2), the wake-up signal of the radio transmission circuit (10) is sent to the configuration data receiving module (7) through the bypass module (5), and the configuration data receiving module (7) sends the received wake-up signal contained in the configuration data to the wake-up module (11).
Specifically, the frequency f3 takes on a value in the range of 10kHz to 2000 kHz.
Further, the frequency f3 is a pulse frequency.
The power frequency voltage induced on the antenna (1) is 50Hz alternating current voltage induced by a power line.
The present embodiment provides an apparatus, wherein,
the antenna (1) includes any one of a flat antenna, a helical antenna, a planar helical antenna, and a half-wave element antenna.
The present embodiment provides an apparatus, wherein,
the radio frequency channel module (2) comprises the following circuit units:
a radio frequency Power Amplifier (PA) unit, a radio frequency Low Noise Amplifier (LNA) unit and a transmitting-receiving isolating switch which work in a time division duplex mode; or
A radio frequency Power Amplifier (PA) unit, a radio frequency Low Noise Amplifier (LNA) unit and a transceiving duplexer which work in a frequency division duplex mode; or
A radio frequency Power Amplifier (PA) unit; or
A radio frequency Low Noise Amplifier (LNA) unit.
The present embodiment provides an apparatus, wherein,
the radio frequency channel module (2) further comprises at least one of an up-conversion and a down-conversion circuit unit.
The present embodiment provides an apparatus, wherein,
the isolation module (4) comprises a filter circuit unit which allows the frequency of a wireless channel used when the radio transmission circuit (10) performs wireless data transmission to pass through and prevents a 50Hz power line induced voltage signal and a configuration signal of the radio transmission circuit (10) from passing through.
Specifically, the isolation module (4) is a coupling capacitor C1;
specifically, the coupling capacitance is in the range of 0.06pF to 45 pF.
The present embodiment provides an apparatus, wherein,
the bypass module (5) comprises an inductor L1 and a resistor R1, the inductor L1 and the resistor R1 being connected in series.
Specifically, one end of the inductor L1 is directly electrically connected with the antenna (1), and the other end is electrically connected with the resistor R1;
one end of the resistor R1 is electrically connected with the inductor L1, and the other end is electrically connected with at least one of the induction voltage releasing module (6) and the configuration data receiving module (7).
The inductance L1 takes a value within the range of 1nH to 110 nH;
resistor R1 is selected to have a value in the range of 100 ohms to 90000 ohms.
The bypass module (5) provides a transmission channel for a 50Hz power line induction signal or a communication configuration signal.
The bypass module (5) and the induced voltage release module (6) as well as the power line and the ground line (8) of the radio transmission circuit (10) jointly form a protection circuit of the radio transmission circuit (10), and the protection circuit prevents the 50Hz industrial frequency induced voltage entering from the antenna (1) from damaging the electric communication circuit (10).
The present embodiment provides an apparatus, wherein,
the induced voltage release module (6) comprises a ground wire discharge conducting element and a power wire discharge conducting element.
When the discharge is carried out through the ground wire (8), the ground wire discharge conducting element is a diode D1;
when discharging through the power line (9), the power line discharge conducting element is a diode D2.
Diode D1 and diode D2 are two separate diodes or two diodes packaged together.
The present embodiment provides an apparatus, wherein,
the bypass module (5) is electrically connected with a wake-up circuit (11) included in the radio transmission circuit (10), and a wake-up signal is sent from the antenna (1) to the wake-up circuit (11) included in the radio transmission circuit (10) through the bypass module (5).
The wake-up signal triggers the radio transmission circuit (10) to enter the operating state from the sleep state.
The present embodiment provides an apparatus, wherein,
the data received and stored by the configuration data receiving module (7) comprises at least one of the ID of the radio transmission circuit (10) or the ID of the device where the radio transmission circuit is located, the work cycle of the data sent by the radio transmission circuit (10) and the alarm threshold value of the radio transmission circuit (10).
The present embodiment provides an apparatus, wherein,
the radio transmission circuit (10) transmits the ID data (identification data) received by the configuration data reception module (7) to the wireless node to which the communication connection exists, using the antenna (1).
The wireless node is a cellular base station, or a wireless local area network access point, or a wireless terminal.
Embodiment two, an example of a power grid electricity measuring device
The utility model provides a pair of electric installation is surveyed to electric wire netting, it is shown with reference to fig. 2, contain antenna (1) that is used for data communication, radio frequency channel module (2), modulation/demodulation module (3), its characterized in that:
the device also comprises an isolation module (4), a bypass module (50) and an induced voltage processing module (20); wherein the content of the first and second substances,
the isolation module (4) is positioned between the antenna (1) and the radio frequency channel module (2) and is used for inhibiting the power frequency voltage induced on the antenna (1) or the communication configuration signal from the antenna (1) from being transmitted to the radio frequency channel module (2);
one end of the bypass module (50) is directly connected with the antenna (1), the other end of the bypass module is connected with the induced voltage processing module (20), the power frequency voltage induced on the antenna (1) is sent to the induced voltage processing module (20) through the bypass module (50), and the induced voltage processing module (20) comprises an induced voltage detection circuit and an induced voltage release circuit.
Specifically, the antenna (1) for data communication is an antenna used for performing radio transmission on data collected by the front end of the internet of things.
-a configuration data reception channel (14) from a specific location on the connection between the isolation module (4) and the antenna (1) to a configuration data reception channel of a configuration data reception module (7), using said configuration data reception channel to configure operating parameters for a radio transmission circuit using said antenna.
The radio transmission circuit (10) is suitable for the wireless transmission of data in transmission and distribution networks.
The radio transmission circuit (10) uses the antenna (1) for receiving or transmitting radio signals;
the transmission conductor is a transmission line or hardware contained in a plug and a socket in a transmission/distribution network.
Referring to fig. 2, the antenna (1) is connected to one end of the isolation module (4) through an antenna feeder, the other end of the isolation module (4) is connected to the radio frequency channel module (2) through a radio frequency, and the radio frequency channel module (2) is electrically connected to the modulation/demodulation module (3);
the antenna (1) transmits the received radio frequency communication signal with the carrier frequency f1 to the radio frequency channel module (2) through the isolation module (4);
the radio frequency channel module (2) comprises the following units:
a radio frequency Power Amplifier (PA) unit, a radio frequency Low Noise Amplifier (LNA) unit and a transmitting-receiving isolating switch which work in a time division duplex mode; or
A radio frequency Power Amplifier (PA) unit, a radio frequency Low Noise Amplifier (LNA) unit and a transceiving duplexer which work in a frequency division duplex mode; or
A radio frequency Power Amplifier (PA) unit; or
A radio frequency Low Noise Amplifier (LNA) unit.
The radio frequency Low Noise Amplifier (LNA) unit is electrically connected with the modulation/demodulation module (3), amplifies a radio frequency signal received by the radio frequency Low Noise Amplifier (LNA) unit and then sends the amplified radio frequency signal to the frequency conversion unit, and the frequency conversion unit down-converts the radio frequency signal and then sends the amplified radio frequency signal to a demodulator contained in the modulation/demodulation module (3);
the radio frequency Power Amplifier (PA) unit is electrically connected with the modulation/demodulation module (3), receives a modulated signal from a modulator contained in the modulation/demodulation module (3) through an up-converter, amplifies the signal and then sends the amplified signal to the antenna (1);
the modulation/demodulation module (3) includes at least one of a modulator and a demodulator.
The carrier frequency f1 takes a value in the range of 100MHz to 80 GHz;
typically, carrier frequency f1 takes on values in the range of 200MHz to 6 GHz.
As a specific implementation, the carrier frequency f1 takes a value in the range of 2GHz to 6 GHz.
The isolation module (4) inhibits the transmission of a 50Hz power frequency signal induced on the antenna (1) to the radio frequency channel module (2) so as to prevent the signal from breaking through a circuit contained in the radio transmission circuit (10); in particular to prevent the signal from breaking through the circuits contained in the radiofrequency channel module (2);
the isolation module (4) inhibits the configuration signal of the radio transmission circuit (10) with the frequency f2 received by the antenna (1) from being transmitted to the radio frequency channel module (2), and the configuration signal of the radio transmission circuit (10) is sent to the configuration data receiving module (7) through the bypass module (50).
The configuration signal carries configuration data of the radio transmission circuit (10), the configuration data of the radio transmission circuit (10) comprising: the ID of the radio transmission circuit (10) or the ID of a device where the radio transmission circuit is located, and the work cycle of data transmitted by the radio transmission circuit (10); an alarm threshold value of the radio transmission circuit (10).
In particular, the frequency f2 takes values in the range of 10kHz to 1000 kHz.
Further, the frequency f2 is a pulse frequency.
The power frequency voltage induced on the antenna (1) is 50Hz alternating current voltage induced by a power line.
The present embodiment provides an apparatus, wherein,
the antenna (1) includes any one of a flat antenna, a helical antenna, a planar helical antenna, and a half-wave element antenna.
The present embodiment provides an apparatus, wherein,
the radio frequency channel module (2) comprises the following circuit units:
a radio frequency Power Amplifier (PA) unit, a radio frequency Low Noise Amplifier (LNA) unit and a transmitting-receiving isolating switch which work in a time division duplex mode; or
A radio frequency Power Amplifier (PA) unit, a radio frequency Low Noise Amplifier (LNA) unit and a transceiving duplexer which work in a frequency division duplex mode; or
A radio frequency Power Amplifier (PA) unit; or
A radio frequency Low Noise Amplifier (LNA) unit.
The present embodiment provides an apparatus, wherein,
the radio frequency channel module (2) further comprises at least one of an up-conversion and a down-conversion circuit unit.
The present embodiment provides an apparatus, wherein,
the isolation module (4) comprises a filter circuit unit which allows the frequency of a wireless channel used when the radio transmission circuit (10) performs wireless data transmission to pass through and prevents a 50Hz power line induced voltage signal and a configuration signal of the radio transmission circuit (10) from passing through.
Specifically, the isolation module (4) is a coupling capacitor C1;
specifically, the coupling capacitance is in the range of 0.06pF to 45 pF.
The present embodiment provides an apparatus, wherein,
the bypass module (50) includes an inductor L1.
Specifically, one end of the inductor L1 is directly electrically connected to the antenna (1), and the other end is electrically connected to the induced voltage processing module (20;
one end of the resistor R11 is electrically connected with the inductor L1, and the other end is electrically connected with the configuration data receiving module (7).
The inductance L1 takes a value within the range of 1nH to 110 nH;
the bypass module (50) provides a transmission channel for a 50Hz power line sensing signal or for a communication configuration signal.
The bypass module (50) and the induced voltage processing module (20) form a protection circuit of the radio transmission circuit (10), and the protection circuit prevents the induced voltage of 50Hz power frequency entering from the antenna (1) from damaging the electric communication circuit (10).
The present embodiment provides an apparatus, wherein,
the induced voltage detection circuit comprises a field effect transistor Q21 and a triode Q22;
the conduction of the field effect transistor Q21 drives the conduction of the triode Q22, the conduction of the triode Q22 drives the voltage reduction of the electrified detection output end Out of the inductive voltage processing module (20), and the voltage change of the output end Out is used for judging whether inductive voltage exists or not or judging whether a power grid is electrified or not.
The present embodiment provides an apparatus, wherein,
the induced voltage release circuit comprises a transient suppression diode D21;
the induced voltage acts on the transient suppression diode D21, when the voltage at two ends of the transient suppression diode D21 is greater than the conduction voltage set value V21, the transient suppression diode D21 is conducted, the induced voltage greater than the conduction voltage set value V21 is released, and the radio frequency channel module (2) is protected.
The present embodiment provides an apparatus, wherein,
the bypass module (50) provides a channel for the transmission of the induced voltage from the antenna (1) to the induced voltage processing module (20) and also provides a channel for the transmission of the configuration data from the antenna (1) to the configuration data receiving module (7).
The present embodiment provides an apparatus, wherein,
the data received and stored by the configuration data receiving module (7) comprises at least one of the ID of the radio transmission circuit (10) or the ID of the device where the radio transmission circuit is located, the work cycle of the data sent by the radio transmission circuit (10) and the alarm threshold value of the radio transmission circuit (10).
The present embodiment provides an apparatus, wherein,
the radio transmission circuit (10) transmits the ID data (identification data) received by the configuration data reception module (7) to the wireless node to which the communication connection exists, using the antenna (1).
The wireless node is a cellular base station, or a wireless local area network access point, or a wireless terminal.
In this embodiment, referring to fig. 2, the power frequency induced voltage channel (30) includes an antenna (1) for data communication, a bypass module (50), and an induced voltage processing module (20);
wherein the bypass module (50) comprises an inductance L1.
In this embodiment, compared to fig. 1, fig. 2 shows the induced voltage processing module (20), the power frequency induced voltage channel (30), and the bypass module (50) are newly added modules or channels;
with respect to fig. 1, fig. 2 shows a configuration data reception channel 14 comprising an antenna (1) for data communication, a bypass module (50) and a resistor R11;
the remaining blocks presented in fig. 2 are the same as the blocks responding in fig. 1.
The induced voltage processing module (20) is used for extracting an induced voltage signal to realize electrification judgment, and is also used for releasing the induced voltage with the amplitude exceeding the safety range through the voltage release circuit, so that the amplitude of the induced voltage is limited in the safety range, and the radio communication circuit associated with the antenna is prevented from being broken down by the induced voltage.
The induced voltage processing module (20) comprises an induced voltage detection circuit and an induced voltage release circuit; wherein the content of the first and second substances,
the induced voltage detection circuit comprises a field effect transistor Q21 and a triode Q22;
the induced voltage release circuit comprises a transient suppression diode D21;
the induced voltage is applied to the induced voltage detection circuit and the induced voltage release circuit through the bypass module (50);
the induction voltage acts on the input end of a field effect transistor Q21 contained in the induction voltage detection circuit correspondingly, the induction voltage enables a field effect transistor Q21 to be conducted, the conduction of a field effect transistor Q21 drives a triode Q22 to be conducted, the conduction of the triode Q22 enables the voltage of an Out output end corresponding to R26 to be reduced, and the voltage change of the Out output end is used for judging whether the induction voltage exists or not or judging whether a power grid is electrified or not;
when the voltage at two ends of the transient suppression diode D21 is larger than a conduction voltage set value V21, the transient suppression diode D21 is conducted, the induced voltage larger than a conduction voltage set value V21 is released, and the radio frequency channel module (2) is protected.
Q21 is a field effect transistor, specifically an NMOS transistor, when GS turn-on voltage of the NMOS transistor is more than 1.8V, the NMOS transistor is turned on, D21 is a transient suppression diode, which is also called as TVS transistor; when the voltage at the two ends of the TVS tube is greater than the set conducting voltage value V21, the TVS tube is conducted, and the induced voltage greater than the set conducting voltage value V21 is released, so that the radio frequency channel module (2) is protected.
In this embodiment, the on-voltage setting V21 is 5V.
The induced voltage detection circuit further includes: r21 to R26, C21 to 24; in particular, the amount of the solvent to be used,
r21 takes the value of 10K, R22 takes the value of 12M, R23 takes the value of 1M, R24 takes the value of 200 Europe, R25 takes the value of 10K, R26 takes the value of 5.1K;
the value of C21 is 0.01uF, the value of C22 is 0.33 uF, the value of C23 is 10 uF, and the value of C24 is 0.1 uF.
In this embodiment, the configuration data receiving channel 14 shown in fig. 2 includes an antenna (1) for data communication, a bypass module (50), and a resistor R11.
The embodiment of the utility model provides a method and device can use electronic technology, radio transmission technology and internet technology to realize in whole or part; the embodiment of the utility model provides a module or unit that device contains can adopt structural component and electronic components to realize.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
The utility model discloses concrete embodiment provides a power grid electricity measuring device has overcome current nearly electric alarm and can not the teletransmission data, can not fuse with the thing networking front end organic, can not be arranged in outdoor environment under for a long time at least one of these shortcomings of fixed point monitoring. The device is integrally realized with the front end of the Internet of things, the induction voltage is used for carrying out live detection, and is prevented from puncturing the front end circuit of the Internet of things, the device can work outdoors for a long time, and electric field data can be collected and transmitted in real time.
Claims (7)
1. An electricity network detecting device comprising an antenna (1) for data communication, a radio frequency channel module (2), a modulation/demodulation module (3), characterized in that:
the device also comprises an isolation module (4), a bypass module (50) and an induced voltage processing module (20); wherein the content of the first and second substances,
the isolation module (4) is positioned between the antenna (1) and the radio frequency channel module (2) and is used for inhibiting the power frequency voltage induced on the antenna (1) or the communication configuration signal from the antenna (1) from being transmitted to the radio frequency channel module (2);
one end of the bypass module (50) is directly connected with the antenna (1), the other end of the bypass module is connected with the induced voltage processing module (20), the power frequency voltage induced on the antenna (1) is sent to the induced voltage processing module (20) through the bypass module (50), and the induced voltage processing module (20) comprises an induced voltage detection circuit and an induced voltage release circuit.
2. The apparatus of claim 1, wherein,
the antenna (1) includes any one of a flat antenna, a helical antenna, a planar helical antenna, and a half-wave element antenna.
3. The apparatus of claim 1, wherein,
the isolation module (4) comprises a filter circuit unit which allows the frequency of a wireless channel used when the radio transmission circuit (10) performs wireless data transmission to pass through and prevents a 50Hz power line induced voltage signal and a configuration signal of the radio transmission circuit (10) from passing through.
4. The apparatus of claim 1, wherein,
the bypass module (50) comprises an inductance L1;
specifically, one end of the inductor L1 is directly electrically connected to the antenna (1), and the other end is electrically connected to the induced voltage processing module (20).
5. The apparatus of claim 1, wherein,
the induced voltage detection circuit contained in the induced voltage processing module (20) comprises a field effect transistor Q21 and a triode Q22;
the conduction of the field effect transistor Q21 drives the conduction of the triode Q22, the conduction of the triode Q22 drives the voltage reduction of the electrified detection output end Out of the inductive voltage processing module (20), and the voltage change of the output end Out is used for judging whether inductive voltage exists or not or judging whether a power grid is electrified or not.
6. The apparatus of claim 1, wherein,
the induced voltage processing module (20) comprises an induced voltage release circuit comprising a transient suppression diode D21;
the induced voltage acts on the transient suppression diode D21, when the voltage at two ends of the transient suppression diode D21 is greater than the conduction voltage set value V21, the transient suppression diode D21 is conducted, the induced voltage greater than the conduction voltage set value V21 is released, and the radio frequency channel module (2) is protected.
7. The apparatus of claim 1, wherein,
the bypass module (50) provides a channel for the transmission of the induced voltage from the antenna (1) to the induced voltage processing module (20) and also provides a channel for the transmission of the configuration data from the antenna (1) to the configuration data receiving module (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922413032.5U CN210780772U (en) | 2019-12-29 | 2019-12-29 | Power grid electricity testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922413032.5U CN210780772U (en) | 2019-12-29 | 2019-12-29 | Power grid electricity testing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210780772U true CN210780772U (en) | 2020-06-16 |
Family
ID=71046715
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922413032.5U Active CN210780772U (en) | 2019-12-29 | 2019-12-29 | Power grid electricity testing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210780772U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112130046A (en) * | 2020-09-24 | 2020-12-25 | 中国南方电网有限责任公司超高压输电公司贵阳局 | Method and device for restraining high-voltage power frequency induced voltage in high-voltage test |
| CN114113863A (en) * | 2021-12-03 | 2022-03-01 | 华北电力大学 | Harmonic voltage on-line measuring device and method for elbow-shaped terminal of high-voltage cable |
-
2019
- 2019-12-29 CN CN201922413032.5U patent/CN210780772U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112130046A (en) * | 2020-09-24 | 2020-12-25 | 中国南方电网有限责任公司超高压输电公司贵阳局 | Method and device for restraining high-voltage power frequency induced voltage in high-voltage test |
| CN112130046B (en) * | 2020-09-24 | 2023-11-21 | 中国南方电网有限责任公司超高压输电公司贵阳局 | Method and device for inhibiting high-voltage power frequency induced voltage in high-voltage test |
| CN114113863A (en) * | 2021-12-03 | 2022-03-01 | 华北电力大学 | Harmonic voltage on-line measuring device and method for elbow-shaped terminal of high-voltage cable |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN210780772U (en) | Power grid electricity testing device | |
| CN108267647B (en) | Detection method and device for power conduction electromagnetic leakage protection | |
| CN104950164A (en) | Lightning overvoltage monitoring system for substation secondary system | |
| CN105553502B (en) | A kind of short-wave radio set and its transmitting guard method | |
| CN108173557A (en) | A kind of active matching network equipment | |
| CN212667157U (en) | Signal filtering circuit and charging pile | |
| CN203811663U (en) | Wireless current detection unit used for electricity larceny prevention | |
| CN207459836U (en) | A kind of wireless monitoring device for disconnector | |
| CN205120900U (en) | Submarine cable direct current partial discharge detector probe | |
| CN103501204B (en) | A kind of X-band power output telemetry-acquisition device | |
| CN113067789A (en) | Intelligent monitoring system for communication engineering feature recognition | |
| CN105116306A (en) | Acquisition method and device of substation partial discharge live detection electromagnetic interference | |
| CN207571210U (en) | A kind of wireless monitoring device with leakage current detection function | |
| CN207490622U (en) | A kind of identifying system and wireless charging system of wireless charging communication | |
| CN210780771U (en) | Radio transmission circuit with antenna additional channel | |
| CN203069680U (en) | Electromagnetic wave detection device | |
| CN105652075A (en) | High voltage pole lightning conductor lightning impact current monitoring system | |
| CN203216990U (en) | Track frequency shift signal detection device | |
| CN104580629A (en) | Device for detecting mobile phone module antenna open circuit based on signal improvement and detection method | |
| CN210405228U (en) | Intelligent robot safety control system | |
| CN210015153U (en) | Active electromagnetic interference electricity stealing alarm device | |
| CN202886438U (en) | Detecting device for preventing current from being stolen by means of bypass or open circuit of current input end | |
| CN113131960A (en) | Method and device for using radio antenna additional channel | |
| CN207968476U (en) | A kind of active matching network equipment | |
| CN108594064A (en) | A kind of low pressure protection against electric shock prior-warning device and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |