CN109375015B - Current drainage detection device and remote transmission system - Google Patents
Current drainage detection device and remote transmission system Download PDFInfo
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- CN109375015B CN109375015B CN201811277920.2A CN201811277920A CN109375015B CN 109375015 B CN109375015 B CN 109375015B CN 201811277920 A CN201811277920 A CN 201811277920A CN 109375015 B CN109375015 B CN 109375015B
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- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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Abstract
The embodiment of the invention relates to a drainage detection device and a remote transmission system, wherein the drainage detection device is used for connecting a drainage device, the drainage device is connected with a buried pipeline, and the drainage detection device comprises: the device comprises a reverse voltage detection module, a forward voltage detection module and a processing module; the reverse voltage detection module is used for connecting the negative electrode of the electric drainage device and detecting a reverse voltage signal of the electric drainage device; the positive voltage detection module is used for connecting the positive electrode of the electric drainage device and detecting a positive voltage signal of the electric drainage device; the processing module is respectively connected with the reverse voltage detection module and the forward voltage detection module and used for acquiring a reverse voltage signal and a forward voltage signal, and comparing the reverse voltage signal with a preset reverse voltage value and comparing the forward voltage signal with a preset forward voltage value so as to judge whether the working state of the electric drainage device is normal or not, so that the on-line monitoring of the fault of the electric drainage device is realized, manpower and material resources are saved, and the detection efficiency is improved.
Description
Technical Field
The embodiment of the invention relates to the field of pipeline stray current detection and drainage detection, in particular to a drainage detection device and a remote transmission system.
Background
With the development of urban economy, subways have been rapidly developed as important urban vehicles. The positive pole of the subway is powered by an overhead contact net or a third rail, and the negative pole of the subway takes a running rail as a traction backflow conductor. In the running process of the subway, under the action of a humid environment, metal dust generated by friction between a vehicle and a steel rail continuously reduces the insulation resistance between the steel rail and the ground, so that a part of traction backflow current flows to the ground to form stray current. When the stray current flows through the underground metal structure, electrochemical corrosion is generated at the position where the stray current flows out.
As the subway, high-pressure gas pipelines, oil gas pipelines and other metal pipelines are inevitably crossed and accompanied, the stray current has great harm to the high-pressure gas pipelines and the oil gas pipelines along the subway. In order to solve the interference of stray current of a buried pipeline, a stray current drainage device, a drainage ground bed and the like are installed on a high-pressure gas and oil gas pipeline. However, the inventors found in practice that: the drain is easily damaged after a thunderstorm or in the presence of a large current in the ground. When the drainer is damaged, the stray current cannot be drained normally, and the high-pressure gas and oil gas pipeline cannot be protected. If the drainer with the fault cannot be found in time, the pipeline can be seriously corroded, the pipeline is detected only by manpower on site, the input manpower and material resources are large, the fault can be found after a long time, and the hidden trouble of the fault cannot be eliminated in time.
Disclosure of Invention
Therefore, it is necessary to provide a drainage detection device and a remote transmission system for solving the problem that a pipeline is seriously corroded due to failure of a drainage device which cannot be found in time.
In a first aspect, an embodiment of the present invention provides a drainage detection device, where the drainage detection device is used to connect a drainage device, and the drainage device is connected to a buried pipeline, and the drainage detection device includes: the device comprises a reverse voltage detection module, a forward voltage detection module and a processing module;
the reverse voltage detection module is used for connecting the negative electrode of the electric drainage device and detecting a reverse voltage signal of the electric drainage device;
the positive voltage detection module is used for connecting the positive electrode of the electric drainage device and detecting a positive voltage signal of the electric drainage device;
the processing module is respectively connected with the reverse voltage detection module and the forward voltage detection module and used for acquiring a reverse voltage signal and a forward voltage signal, and comparing the reverse voltage signal with a preset reverse voltage value and comparing the forward voltage signal with a preset forward voltage value so as to judge whether the working state of the electric drainage device is normal.
In one embodiment, the reverse voltage detection module comprises: the device comprises a first voltage signal sampling unit, a first signal isolation amplifying unit and a first voltage signal processing unit;
the input end of the first voltage signal sampling unit is connected with the negative electrode of the electric drainage device, the output end of the first voltage signal sampling unit is connected with the input end of the first signal isolation amplifying unit, the output end of the first signal isolation amplifying unit is connected with the input end of the first voltage signal processing unit, and the output end of the first voltage signal processing unit is connected with the processing module.
In one embodiment, the forward voltage detection module comprises: the second voltage signal sampling unit, the second signal isolation amplifying unit and the second voltage signal processing unit;
the input end of the second voltage signal sampling unit is connected with the anode of the electric drainage device, the output end of the second voltage signal sampling unit is connected with the input end of the second signal isolation amplifying unit, the output end of the second signal isolation amplifying unit is connected with the input end of the second voltage signal processing unit, and the output end of the second voltage signal processing unit is connected with the processing module.
In one embodiment, the second voltage signal processing unit includes: the alternating current signal processing subunit and the direct current signal processing subunit;
the alternating current signal processing subunit comprises an alternating current blocking circuit and a direct current conversion circuit;
the input end of the AC/DC blocking circuit is connected with the output end of the second signal isolation amplifying unit, the output end of the AC/DC blocking circuit is connected with the input end of the DC conversion circuit, and the output end of the DC conversion circuit is connected with the processing module;
the direct current signal processing subunit comprises a direct current-isolated alternating current circuit;
the input end of the direct current-isolated alternating current circuit is connected with the output end of the second signal isolation amplifying circuit, and the output end of the direct current-isolated alternating current circuit is connected with the processing module.
In one embodiment, the device further comprises a power supply module;
the power supply module is used for providing working power for the reverse voltage detection module, the forward voltage detection module and the processing module.
In one embodiment, the timing control system further comprises a first timing control module;
the output end of the first timing control module is respectively connected with the input end of the first voltage signal sampling unit and the input end of the second voltage signal sampling unit and is used for controlling the first voltage signal sampling unit and the second voltage signal sampling unit to start or interrupt work in a timing mode.
In one embodiment, the processing module further comprises a second timing control module;
the output end of the second timing control module is connected with the input end of the power supply module and used for controlling the power supply module to be turned on and turned off at regular time.
In one embodiment, the drainage detection device comprises a housing, and the reverse voltage detection module and the forward voltage detection module are disposed in a cavity of the housing.
In one embodiment, the system further comprises an anti-theft alarm module;
the anti-theft alarm module comprises a vibration switch, a human body induction radar, an alarm unit and a control unit; the vibration switch is arranged on the shell, and the human body induction radar is arranged close to the drainage detection device;
the vibration switch, the human body induction radar and the alarm unit are all connected with the control unit, and the control unit is used for controlling the working state of the alarm unit according to the detection results of the vibration switch and the human body induction radar.
In a second aspect, an embodiment of the present invention further provides a drainage detection remote transmission system, including a communication module, an upper computer, and the drainage detection device of the first aspect;
the output end of the processing module is connected with the input end of the communication module, and the output end of the communication module is connected with the upper computer.
The above-mentioned embodiment provides a drainage detection device and remote transmission system, this drainage detection device connects the drain, reverse voltage signal through drainage detection device's reverse voltage detection module detects the drain, forward voltage detection module detects the forward voltage signal of drain, processing module acquires this reverse voltage signal and predetermines reverse voltage value, this forward voltage signal and predetermine forward voltage value and carry out the comparison, judge whether this drain normally works, realize the on-line monitoring to the drain trouble, manpower and materials are saved, can transmit the testing result to the host computer through remote transmission system simultaneously, the staff of being convenient for in time discovers the operating condition of drain, improve detection efficiency.
Drawings
Fig. 1 is a schematic structural view of an drainage detection device according to an embodiment of the present invention;
fig. 2 is another schematic structural diagram of a drainage detection device according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of an burglar alarm module according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a drainage detection remote transmission system according to an embodiment of the present invention.
Detailed Description
In order that the invention may be more fully understood, reference will now be made to the following description. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element and be integral therewith, or intervening elements may also be present. The terms "mounted," "one end," "the other end," and the like are used herein for illustrative purposes only. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Fig. 1 is a schematic structural diagram of a drainage detection device according to an embodiment of the present invention, and as shown in fig. 1, the drainage detection device 10 is used for connecting a drainage device 20, the drainage device 20 is connected to a buried pipeline 30, and the drainage detection device 10 includes: a reverse voltage detection module 110, a forward voltage detection module 120, and a processing module 130.
A reverse voltage detection module 110, configured to connect to a negative electrode of the drainage device 20, and configured to detect a reverse voltage signal of the drainage device 20; a forward voltage detection module 120, configured to connect to a positive electrode of the drainer 20, and configured to detect a forward voltage signal of the drainer 20; the processing module 130 is respectively connected to the reverse voltage detection module 110 and the forward voltage detection module 120, and configured to obtain a reverse voltage signal and a forward voltage signal, and compare the reverse voltage signal with a preset reverse voltage value and the forward voltage signal with a preset forward voltage value, so as to determine whether the working state of the drainer 20 is normal.
The drainer 20 is an electrical device connected to the buried pipeline 30 to eliminate the effect of stray currents on the steel pipeline. In the embodiment, the buried pipeline 30 includes steel pipelines such as a high-pressure gas pipeline and an oil and gas pipeline. The negative electrode of the drainer 20 is connected with the buried pipeline 30, the potential of the surface of the buried pipeline 30 is detected, and the voltage of the surface of the buried pipeline 30 can be obtained according to the detected potential information.
According to the positive and negative characteristics of the detection voltage, the drainage detection device comprises: a reverse voltage detection module 110 and a forward voltage detection module 120. The stray current flows from the anode to the cathode of the electric drainage device to achieve the effect of eliminating the stray current, but cannot flow from the cathode to the anode, so that the stray current is accumulated at the cathode end of the electric drainage device. The reverse voltage detection module 110 is connected to the negative electrode of the drain and is configured to detect a reverse voltage signal of the drain. The forward voltage detection module 120 is connected to the positive electrode of the drain and is configured to detect a forward voltage signal of the drain. When the drainer 20 is operating normally, since the stray current is eliminated in time, the stray current accumulated at the positive and negative terminals of the drainer is limited, and the detected reverse current signal and forward voltage signal are maintained at a low potential.
The processing module 130 may be a module with a data processing function, such as a single chip microcomputer and a microprocessor. The processing module 130 is connected to the reverse voltage detection module 110 for obtaining the reverse voltage and connected to the forward voltage detection module 120 for obtaining the forward voltage, respectively. Under the condition that the drainer normally works, the stray current can flow from the positive pole of the drainer to the negative pole to eliminate the forward stray current, and can also flow from the negative pole of the drainer to the positive pole to eliminate the reverse stray current. The reverse voltage signal measured by the negative terminal of the drain and the forward voltage signal measured by the positive terminal are within a normal range, and the preset reverse voltage value and the preset forward voltage value are stored in the memory of the processing module 130 according to the reverse voltage value and the forward voltage value of the drain in a normal working state. The processing module 130 is connected to the reverse voltage detection module 110 and the forward voltage detection module 120, obtains a current reverse voltage signal at the negative terminal and a current forward voltage signal at the positive terminal of the drainer, and compares the current forward voltage signal and the current reverse voltage signal with a preset reverse voltage value and a preset forward voltage value in the processing module 130. If the current reverse voltage signal is lower than the preset reverse voltage value and the current forward voltage signal is lower than the preset forward voltage value, the current working state of the electric drainage device is normal; if the current reverse voltage signal is higher than or equal to the preset reverse voltage value, or the current forward voltage signal is higher than or equal to the preset forward voltage value, the current working state of the electric drainage device is abnormal.
The drainage detection device provided by the embodiment of the invention comprises a reverse voltage detection module, a forward voltage detection module and a processing module; the reverse voltage detection module is used for connecting the negative electrode of the electric drainage device and detecting a reverse voltage signal of the electric drainage device; the positive voltage detection module is used for connecting the positive electrode of the electric drainage device and detecting a positive voltage signal of the electric drainage device; the processing module obtains the reverse voltage signal and the forward voltage signal, and compares the reverse voltage signal with a preset reverse voltage value and the forward voltage signal with a preset forward voltage value to judge whether the working state of the electric drainage device is normal or not, so that the on-line detection of the working state of the electric drainage device is realized, the cost of manpower detection is reduced, and manpower and material resources are saved.
Fig. 2 is another schematic structural diagram of an drainage detection device according to an embodiment of the present invention, as shown in fig. 2, in an embodiment of the invention, the reverse voltage detection module 110 includes: a first voltage signal sampling unit 111, a first signal isolation amplifying unit 112 and a first voltage signal processing unit 113; the input end of the first voltage signal sampling unit 111 is connected to the negative electrode of the electric drainage, the output end of the first voltage signal sampling unit 111 is connected to the input end of the first signal isolation amplifying unit 112, the output end of the first signal isolation amplifying unit 112 is connected to the input end of the first voltage signal processing unit 113, and the output end of the first voltage signal processing unit 113 is connected to the processing module.
The first voltage signal sampling unit 111 is a circuit unit that implements a signal sampling function, and may be a sampling circuit that converts an analog signal into a digital signal, such as an analog-to-digital converter, or may be another signal sampling unit. In an embodiment, the first voltage signal sampling unit 111 samples the reverse voltage of the negative terminal of the drainer. The first signal isolation amplifying unit 112 receives the reverse voltage flowing out from the first voltage signal sampling unit 111, and amplifies and isolates the reverse voltage. The first voltage signal processing unit 113 further processes the amplified and isolated voltage signal to meet the detection requirement. Alternatively, in an embodiment, the first voltage signal processing unit 113 is an inverter unit configured to invert the phase of the acquired reverse voltage by 180 degrees, and the inverter unit may be a TTL inverter, a CMOS inverter, or the like.
Further, in this embodiment, the first signal isolation amplifying unit 112 may include a first operational amplifier and a first signal isolator, for example, the first operational amplifier may be a first operational amplifier of TL062 model, and the first signal isolator may be a first signal isolator of IS0124 model. Optionally, the first voltage signal sampling unit 111 may further include a first filter circuit, where the first filter circuit is connected in series between the pipeline and the first signal isolation and amplification circuit, and is configured to filter the electrical signal output by the pipeline. The first voltage signal processing unit 113 includes an inverter of model TL 062. The first voltage signal processing unit 113 outputs the processed reverse voltage signal to a value processing module.
With continued reference to FIG. 2, in one embodiment, the forward voltage detection module includes: a second voltage signal sampling unit 121, a second signal isolation amplifying unit 122, and a second voltage signal processing unit 123; the input end of the second voltage signal sampling unit 121 is connected to the positive electrode of the electric drainage, the output end of the second voltage signal sampling unit 121 is connected to the input end of the second signal isolation and amplification unit 122, the output end of the second signal isolation and amplification unit 122 is connected to the input end of the second voltage signal processing unit 123, and the output end of the second voltage signal processing unit 123 is connected to the processing module.
The second voltage signal sampling unit 121 may be a circuit unit that implements a signal sampling function, may be a sampling circuit that converts an analog signal into a digital signal, such as an analog-to-digital converter, or may be another signal sampling unit. In an embodiment, the second voltage signal sampling unit 121 samples a forward voltage at the positive terminal of the drainer 20, and the second signal isolation and amplification unit 122 receives the forward voltage output by the second voltage signal sampling unit 121, and amplifies and isolates the forward voltage. The second voltage signal processing unit 123 further processes the amplified and isolated voltage signal to meet the detection requirement. The stray currents in the positive end due to the drain include positive and negative stray currents. Optionally, in an embodiment, the second voltage signal processing unit 123 may be configured to further process the stray current according to an electrical property, so as to detect a positive stray current and a negative stray current in the stray current. The second voltage signal processing unit 123 outputs the processed signal to the processing module.
In one embodiment, the second voltage signal processing unit 123 includes: the alternating current signal processing subunit and the direct current signal processing subunit; the alternating current signal processing subunit comprises an alternating current blocking circuit and a direct current conversion circuit; the input end of the alternating current-direct current blocking circuit is connected with the output end of the second signal isolation amplifying unit 122, the output end of the alternating current-direct current blocking circuit is connected with the input end of the direct current conversion circuit, and the output end of the direct current conversion circuit is connected with the processing module; the direct current signal processing subunit comprises a direct current-isolated alternating current circuit; the input end of the direct current-isolated alternating current circuit is connected with the output end of the second signal isolation amplifying circuit, and the output end of the direct current-isolated alternating current circuit is connected with the processing module.
The forward voltage signal includes an alternating current signal and a direct current signal. In an embodiment, the second voltage signal processing unit 123 performs separate processing on the ac signal and the dc signal for the sampled forward voltage signal. The forward voltage signal processed by the second signal isolation and amplification unit 122 passes through the ac blocking circuit and then isolates the dc voltage signal, and outputs the ac voltage signal to the dc conversion circuit. The direct current conversion circuit converts the alternating current voltage signal into an equivalent direct current voltage signal and outputs the output equivalent direct current voltage signal to the processing module. Optionally, in this embodiment, the dc conversion circuit may be a single-chip root-mean-square dc converter of an AD637 type.
With continued reference to FIG. 2, in one embodiment, a power supply module 140 is also included; the power supply module 140 is used for providing working power for the reverse voltage detection module, the forward voltage detection module and the processing module.
Optionally, the power supply module 140 includes a storage battery and a power regulator. The power supply voltage stabilizer is used for converting a voltage signal output by the storage battery into a power supply voltage suitable for working with each functional module, optionally, a three-terminal voltage stabilizer of 78L05 is used for converting an input voltage into an output voltage of 5V in implementation, and the three-terminal voltage stabilizer is connected with the reverse voltage detection module, the forward voltage detection module and the processing module to provide a working power supply.
With continued reference to FIG. 2, in one embodiment, a first timing control module 150 is also included; the output end of the first timing control module 150 is connected to the input end of the first voltage signal sampling unit 111 and the input end of the second voltage signal sampling unit 121, respectively, and is used for controlling the first voltage signal sampling unit 111 and the second voltage signal sampling unit 121 to start or interrupt work at a certain timing.
The output end of the first timing control module 150 is connected with the input end of the first voltage signal sampling unit 111, and the first timing control module 150 outputs high and low pulses to control the first voltage signal sampling unit 111 to collect reverse voltage signals. Similarly, the output end of the first timing control module 150 is connected to the input end of the second voltage signal sampling unit 121, and the first timing control module 150 outputs high and low pulses to control the second voltage signal sampling unit 121 to collect the forward voltage signal. The control of the operating state of the drainage detection device is realized by controlling the operating states of the first voltage signal sampling unit 111 and the second voltage signal sampling unit 121. For example, the first timing control module 150 may output a high level pulse every 4 hours to drive the first voltage signal sampling unit 111 and the second voltage signal sampling unit 121 to start collecting the voltage signals.
With continued reference to FIG. 2, in one embodiment, the processing module further includes a second timing control module 160; the output end of the second timing control module 160 is connected to the input end of the power supply module 140, and is used for timing control of the power supply module 140 on and off.
The second timing control module 160 is connected to the input end of the power supply module 140, the second timing control module 160 outputs high and low pulses to control the power supply module 140 to turn on or off to stop supplying power, and the power supply state of the power supply module 140 is controlled to control the working state of the drainage detection device, for example, the second timing control module 160 may output a high level pulse every 4 hours to drive the power supply module to supply power to each module, so that each module unit starts to work to detect whether the drainage detection device is abnormal.
In one embodiment, the drainage detection device comprises a housing, and the reverse voltage detection module and the forward voltage detection module are disposed in a cavity of the housing.
In order to reduce the influence of the external environment on the drainage detection device, the drainage detection device may be disposed in the housing to protect the drainage detection device. In an embodiment, the drainage detection device includes a housing, which may have various shapes, such as a hollow sphere, a hollow cylinder, a hollow square, and the like, so as to place the reverse voltage detection module and the forward voltage detection module in a cavity of the housing.
In one embodiment, the drainage detection device further comprises an anti-theft alarm module. Fig. 3 is a schematic structural diagram of an anti-theft alarm module according to an embodiment of the present invention, as shown in fig. 3, the anti-theft alarm module includes a vibration switch 310, a human body induction radar 320, an alarm unit 330, and a control unit 340; the vibration switch 310 is arranged on the shell, and the human body induction radar 320 is arranged close to the drainage detection device; the vibration switch 310, the human body induction radar 320 and the alarm unit 330 are all connected to the control unit 340, and the control unit 340 is used for controlling the working state of the alarm unit 330 according to the detection results of the vibration switch 310 and the human body induction radar 320.
In an embodiment, if there is a human or animal approaching the drainage detection device 10, the human body induction radar 320 feeds back an electric signal to the control unit 340, or in case of external force triggering, the vibration switch 310 detects a vibration signal and transmits the detected vibration signal to the control unit 340. If the control unit 340 only receives the electric signal fed back by the body-sensing radar 320, it indicates that a person or an animal passes through the drainage detection device 10, and in order to avoid the drainage detection device 10 being damaged by accident, the control unit 340 controls the light emitting device in the alarm unit 330 to emit light to warn the user to get away from the drainage detection device 10. If the control unit 340 receives the electric signal fed back by the human body induction radar 320 and the electric signal fed back by the vibration switch 310 at the same time, it indicates that there is a person or animal trying to move the drainage detection device 10, and at this time, the control unit controls the light emitting device in the alarm unit to emit light and the speaker to play voice. Optionally, when the control unit 340 receives the signal detected by the vibration switch 310 and the signal detected by the human body induction radar 320 at the same time, the control unit 340 sends an alarm to the bound terminal to notify the staff that the drainage detection device has a theft risk.
Fig. 4 is a schematic structural diagram of the drainage detection remote transmission system provided in the embodiment of the present invention, and as shown in fig. 4, the drainage detection remote transmission system includes a communication module 40, an upper computer 50, and the drainage detection device 10 in the embodiment; the output end of the processing module is connected with the input end of the communication module, and the output end of the communication module is connected with the upper computer.
The communication module 40 may be a wired communication module or a wireless communication module. The upper computer 50 is a computer terminal integrated with various functions such as control, processing, monitoring and the like. The voltage or current signal acquired in the drainage detection device 10 is sent to an upper computer through a communication module. Optionally, the communication module 40 may be a mobile network wireless communication module, and the drainage detection device 10 may send the detected result to the upper computer 50 through a mobile network.
The drainage detection remote transmission system provided by the embodiment sends the detection result of the drainage detection device to the upper computer through the remote transmission technology, so that the working state of the drainage detection device can be conveniently and timely checked by a worker through the upper computer, and the detection efficiency is improved.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A drainage detection device, wherein the drainage detection device is used for connecting a drain to detect whether the drain normally excludes forward stray current and reverse stray current; the drainage device is connected with a buried pipeline, and the drainage detection device comprises: the device comprises a reverse voltage detection module, a forward voltage detection module and a processing module;
the reverse voltage detection module is connected with the negative electrode of the electric drainage device and used for detecting a reverse voltage signal of the electric drainage device;
the positive voltage detection module is used for connecting the positive electrode of the electric drainage device and detecting a positive voltage signal of the electric drainage device;
the processing module is respectively connected with the reverse voltage detection module and the forward voltage detection module, and is configured to acquire the reverse voltage signal and the forward voltage signal, and compare the reverse voltage signal with a preset reverse voltage value and compare the forward voltage signal with a preset forward voltage value, so as to determine whether the working state of the electric drainage device is normal.
2. The drainage detection device of claim 1, wherein the reverse voltage detection module comprises: the device comprises a first voltage signal sampling unit, a first signal isolation amplifying unit and a first voltage signal processing unit;
the input end of the first voltage signal sampling unit is connected with the negative electrode of the electric drainage device, the output end of the first voltage signal sampling unit is connected with the input end of the first signal isolation amplifying unit, the output end of the first signal isolation amplifying unit is connected with the input end of the first voltage signal processing unit, and the output end of the first voltage signal processing unit is connected with the processing module.
3. The drainage detection device of claim 2, wherein the forward voltage detection module comprises: the second voltage signal sampling unit, the second signal isolation amplifying unit and the second voltage signal processing unit;
the input end of the second voltage signal sampling unit is connected with the anode of the electric drainage device, the output end of the second voltage signal sampling unit is connected with the input end of the second signal isolation amplifying unit, the output end of the second signal isolation amplifying unit is connected with the input end of the second voltage signal processing unit, and the output end of the second voltage signal processing unit is connected with the processing module.
4. The drainage detection device of claim 3, wherein the second voltage signal processing unit includes: the alternating current signal processing subunit and the direct current signal processing subunit;
the alternating current signal processing subunit comprises an alternating current blocking circuit and a direct current conversion circuit;
the input end of the AC/DC blocking circuit is connected with the output end of the second signal isolation amplifying unit, the output end of the AC/DC blocking circuit is connected with the input end of the DC conversion circuit, and the output end of the DC conversion circuit is connected with the processing module;
the direct current signal processing subunit comprises a direct current-isolated alternating current circuit;
the input end of the direct current-isolated alternating current circuit is connected with the output end of the second signal isolation amplifying circuit, and the output end of the direct current-isolated alternating current circuit is connected with the processing module.
5. The flow discharge detection device as recited in any one of claims 1-4, further comprising a power supply module;
the power supply module is used for providing working power for the reverse voltage detection module, the forward voltage detection module and the processing module.
6. The drainage detection device of claim 3, further comprising a first timing control module;
the output end of the first timing control module is respectively connected with the input end of the first voltage signal sampling unit and the input end of the second voltage signal sampling unit and is used for controlling the first voltage signal sampling unit and the second voltage signal sampling unit to start or interrupt work in a timing mode.
7. The drainage detection device of claim 5, wherein the processing module further comprises a second timing control module;
the output end of the second timing control module is connected with the input end of the power supply module and is used for controlling the power supply module to be turned on and turned off in a timing mode.
8. The drainage detection device of claim 1, comprising a housing, wherein the reverse voltage detection module and the forward voltage detection module are disposed in a cavity of the housing.
9. The drainage detection device of claim 8, further comprising an anti-theft alarm module;
the anti-theft alarm module comprises a vibration switch, a human body induction radar, an alarm unit and a control unit; the vibration switch is arranged on the shell, and the human body induction radar is arranged close to the drainage detection device;
the control unit is used for controlling the working state of the alarm unit according to the detection results of the vibration switch and the human body induction radar.
10. An electric drainage detection remote transmission system, characterized by comprising a communication module, an upper computer and an electric drainage detection device as claimed in any one of claims 1-9;
the output end of the processing module is connected with the input end of the communication module, and the output end of the communication module is connected with the upper computer.
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| CN111796159A (en) * | 2020-07-20 | 2020-10-20 | 青岛钢研纳克检测防护技术有限公司 | Method for detecting whether composite type drainage device is damaged or not on site |
| CN113541113A (en) * | 2021-06-11 | 2021-10-22 | 广州燃气集团有限公司 | Drainage method and device of stray current drainage device |
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