CN111089716A - Channel cover plate and detection device for mechanically destroying cover plate or opening cover - Google Patents
Channel cover plate and detection device for mechanically destroying cover plate or opening cover Download PDFInfo
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- CN111089716A CN111089716A CN202010065184.5A CN202010065184A CN111089716A CN 111089716 A CN111089716 A CN 111089716A CN 202010065184 A CN202010065184 A CN 202010065184A CN 111089716 A CN111089716 A CN 111089716A
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- G—PHYSICS
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/20—Investigating the presence of flaws
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G9/00—Installations of electric cables or lines in or on the ground or water
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Abstract
The invention provides a channel cover plate and a detection device for mechanically damaging the cover plate or opening the cover, wherein the channel cover plate comprises a channel cover plate body, a lead arranged in the channel cover plate body, a first resistor connected with the lead in parallel through a first connector and a joint connected with the lead; the channel cover plate can judge the damage or the uncovering condition of the channel cover plate according to the on-off of the lead and the resistance value of the main loop, and the detection convenience is improved.
Description
Technical Field
The invention belongs to the technical field of channel cover plates and detection, and particularly relates to a channel cover plate and a detection device for mechanically destroying the cover plate or opening the cover.
Background
A large number of cables and optical cable channels exist in the power generation facility, and in order to ensure the safety of the cables and the optical cables in the channels, prevent the cables and the optical cables from being aged due to direct irradiation of sunlight and prevent rainwater, dust and sundries from falling into the channels, channel cover plates with a protection effect must be arranged on the channels. The existing channel cover plate is made of cement reinforced concrete materials, polymer composite materials and the like, but is exposed outside for a long time and is subjected to mechanical force effects of rolling, carrying, prying and the like for a long time, so that the existing channel cover plate is very easy to damage, and a worker is required to overhaul the existing channel cover plate regularly, so that the damage condition of the channel cover plate is not easy to detect in time; in order to detect the damaged condition of the channel cover plate, the CN110095504A discloses a channel cover plate, a device and a system for monitoring a mechanical damage channel based on the internet of things; however, the channel cover plate and the monitoring device cannot monitor two states of damage and uncovering of the channel cover plate at the same time.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a channel cover plate and a detection device for mechanically damaging the cover plate or uncovering the cover plate.
One technical scheme of the invention provides a channel cover plate which is applied to a mechanical damage cover plate or an uncovering detection device.
In a further improved scheme, the channel cover plate body comprises a channel cover plate top surface and ribs arranged at the bottom of the channel cover plate top surface.
The invention provides a detection device for mechanically destroying a cover plate or uncovering, which comprises n channel cover plates, n second resistors, a detection bus and a detection assembly connected with the detection bus, wherein n is more than or equal to 1, each channel cover plate comprises a channel cover plate body, a lead arranged in the channel cover plate body, a first resistor connected with the lead in parallel through a first connector and a joint connected with the lead; each second detection resistor is connected with the joint; each second resistor is connected in series through a detection bus.
The detection assembly comprises a constant current source circuit and an analog-to-digital converter, wherein the constant current source circuit and the analog-to-digital converter are connected with one end of the detection bus, the analog-to-digital converter and the constant current source circuit are both connected with the controller, and the other end of the detection bus is connected with the analog-to-digital converter.
In a further improved aspect, the controller includes:
the resistance value setting module is configured to set different resistance values for the first resistors and the second resistors, so that the equivalent resistance value of any x first resistors after being connected in parallel is not equal to the resistance value of any one of the first resistors or the second resistors, the sum of the resistance values of any y second resistors is not equal to the equivalent resistance value of any one of the second resistors after being connected in parallel, and is not equal to the equivalent resistance value of any a first resistors after being connected in parallel, wherein x is not less than 2, y is not less than 2, and a is not less than 2.
In a further improved scheme, the controller further comprises:
a receiving module configured to receive information transmitted by an analog-to-digital converter;
a first calculation module configured to calculate a resistance value from the information received by the reception module;
a second calculation module configured for calculating in real time a current resistance value R1With the current resistance value R1The last resistance value R closest to0The difference △ R of (d);
a first determination module configured to compare the difference △ R to a difference threshold △ R1By comparison, when △ R is more than or equal to △ R1When the fault occurs, sending an instruction to a fault judgment module;
the storage module is configured to be used for storing a corresponding resistance value when the channel cover plate is mechanically damaged or opened;
and the fault judgment module is configured to judge whether the channel cover plate is mechanically damaged or uncapped according to the resistance value stored by the storage module.
In a further improved scheme, the fault determining module includes:
a processing submodule configured for calculating a current resistance value R1And the current resistance value R stored in the memory module1Difference △ R of nearest resistance value2And △ R2And difference threshold △ R1Comparing;
first judgmentA fragment module when △ R2＜△R1The first judgment submodule is configured to judge whether the current resistance value R is larger than the first threshold value according to the current resistance value R stored in the storage module1The closest resistance value judges whether the channel cover plate is mechanically damaged or uncapped and is also configured to send an instruction to the first prompting submodule;
a first prompt submodule configured to issue a mechanically breached or uncapped prompt signal in accordance with the received instruction.
In a further improved scheme, the fault determining module further includes:
second judgment submodule, when △ R2≥△R1The second judgment submodule is configured to judge whether the current resistance value R is larger than the first resistance value R according to the current resistance value R stored in the storage module1The closest resistance value judges whether the channel cover plate is mechanically damaged or uncapped and is also configured to send an instruction to the first prompting submodule and the second prompting submodule;
a second prompt submodule configured to signal a leakage.
The channel cover plate and the detection device for mechanically damaging the cover plate or opening the cover, which are provided by the invention, have simple structures, and can judge the damage or the cover opening condition of the channel cover plate according to the on-off of a lead arranged in the channel cover plate and the resistance value of the whole main loop, thereby improving the detection convenience.
Drawings
FIG. 1 is a perspective view of a channel cover plate;
FIG. 2 is a top perspective view of the channel cover plate;
FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;
FIG. 4 is an enlarged view of FIG. 3A;
FIG. 5 is a perspective view of a trench cover plate in accordance with another embodiment of the present invention;
FIG. 6 is a block diagram of a detection device for mechanically breaking a cover or lid;
FIG. 7 is a schematic view of the current flow during a failure of the cover plate of channel number 1;
FIG. 8 is a schematic view of the current flow during uncapping of the No. 1 trench cover;
FIG. 9 is a block diagram of a controller;
fig. 10 is a block diagram showing the configuration of a failure determination module.
Detailed Description
The present invention will be described in further detail with reference to the following examples and drawings.
One embodiment of the present invention provides a trench cover, which is applied to a detection device for mechanically damaging a cover or uncovering, as shown in fig. 1, the trench cover includes a trench cover body 10 and a lead 20 disposed in the trench cover body 10, wherein the lead 20 is preferably made of a copper wire, and is wrapped with a moisture-proof insulating layer, the thickness of the lead 20 is variable, but needs to be disconnected when the trench cover body 10 is mechanically damaged; the lead 20 is arranged in the channel cover plate body 10 in a casting mode; with continued reference to FIG. 1, in some preferred embodiments, to improve the sensitivity of the detection, the lead 20 is disposed in an overall inverted concave shape. According to the invention, the conducting wires are distributed in the channel cover plate, and whether the channel cover plate is damaged or not is judged by detecting the on-off condition of the conducting wires, so that the detection convenience is improved.
In some preferred embodiments, the channel cover body 10 includes a channel cover top surface 11 and ribs 12 disposed at the bottom of the channel cover top surface 11, as shown in fig. 2. The rib 12 and the channel cover plate top surface 11 are integrally formed, as shown in fig. 3, the wire 20 is disposed in the channel cover plate top surface 11, and as shown in fig. 4, two ends of the wire 20 are respectively connected to the terminals 13 disposed in the channel cover plate top surface 11. Wherein, the binding post is welded with two ends of the lead, and waterproof and moistureproof treatment is needed after welding; the strength of the channel cover plate is improved by arranging the ribs.
In some preferred embodiments, the trench cover further includes a first resistor 30 connected in parallel with the conductor 20 through a first connector and a junction 40 connected to the conductor 20, as shown in fig. 5. The resistance values of the first resistors connected in parallel with each channel cover plate are different. Wherein, the joint 40 is a 2-core easy-to-detach joint; the first connector is a binding post 13 which is connected with two ends of the lead 20 and is arranged in the channel cover plate body 10 and a connecting wire which is connected with the binding post, and two ends of the joint 40 are connected to the binding post through the connecting wire; the two ends of the first resistor 30 are connected in parallel between the two binding posts or connected to a connecting line; the connecting wire is a thick wire and is not easy to damage. According to the channel cover plate provided by the invention, through the arrangement of the first resistor and the joint, when the channel cover plate is opened, the opened channel cover plate can be judged by detecting the resistance value on the main loop, so that the convenience of the detection of the opening of the channel cover plate is improved.
As shown in fig. 6, another aspect of the present invention provides a detection apparatus for mechanically breaking a cover or uncovering, the detection apparatus comprising:
n channel cover plates, wherein the value of n can be 10, 20 and the like; the channel cover plate comprises a channel cover plate body 10, a lead 20 arranged in the channel cover plate body 10, a first resistor 30 connected with the lead 20 in parallel through a first connector, and a joint 40 connected with the lead 20; wherein, the resistance values of the first resistors are different; and is enclosed in a box;
the n second resistors 50 are connected with the joints 40 and used for detecting the uncovering condition of the channel cover plate;
a sense bus 60 for connecting the n second resistors 50 in series; the detection bus is a lead which is not easy to damage;
the detection assembly comprises a constant current source circuit 70 and an analog-to-digital converter 80 which are connected with one end of the detection bus, the analog-to-digital converter 80 and the constant current source circuit 70 are both connected with a controller 90, and the other end of the detection bus 60 is connected with the analog-to-digital converter 80.
In some preferred embodiments, the detection device is enclosed within a box. The constant current source circuit is a constant current source circuit known to those skilled in the art, and may be, for example, a constant current source circuit built for LM357, LM317, LM224, or LM 324; the analog-to-digital converter can adopt AD7606, AD7656 and other models; the controller can adopt models of STM32F103RET6, STM32F411RET6, STM32F407ZGT6 and the like. The detection device further comprises a battery for supplying power thereto, the battery being connected to the analog-to-digital converter 80.
Continuing to refer to FIG. 6, a machine is illustratedTamper evident or decap detection. In the figure, the value of n is 3, and the numbers of the channel cover plates are respectively No. 1, No. 2 and No. 3; first resistor R connected with No. 1 channel cover plate in parallel1-1Is set to 200 omega, and a first resistor R connected with the No. 2 channel cover plate in parallel2-1Is set to 800 omega, and the resistance R of the No. 3 channel cover plate3-1Is set to 3200 omega; the numbers of the joints connected with No. 1, No. 2 and No. 3 are P1, P2 and P3 respectively; the numbers of the second resistors are R respectively1-2、R2-2And R3-2The resistances are 200 Ω, 800 Ω, and 3200 Ω, respectively.
The detection principle is as follows: the channel cover plate damage detection bus is used for connecting a constant current source circuit and an analog-to-digital converter and is used as a main loop lead for detection (when theoretical calculation is carried out, the resistance on the main loop is ignored); the wire is thin or fragile and needs to be broken simultaneously when the channel cover plate is mechanically damaged so as to effectively and sensitively detect the damage, and the easy-to-release joint is broken when the cover is opened so as to sensitively detect the cover opening. Assuming that the cover plate of channel No. 1 is broken, the current flows through the resistor parallel formula R-R as shown in FIG. 71-1*R1-2/R1-1+R1-2The detection main circuit is provided with a resistance of 100 omega, and the No. 1 cover plate is damaged at the moment, so that the No. 1 channel cover plate is detected to be damaged. If the cover opening action of the channel cover plate No. 1 occurs, the current flows through the P1 connector as shown in fig. 8, the P1 connector is disconnected, the resistance on the detection circuit is 200 omega at the moment, the characteristic of the cover opening action of the channel cover plate No. 1 is achieved, and the channel cover plate No. 1 is judged to be opened according to the resistance value.
The detection device for mechanically damaging the cover plate or opening the cover has a simple structure, can judge whether the channel cover plate is damaged or opened by detecting the change of the internal resistance value of the main loop, and improves the detection convenience.
In some preferred embodiments, the present invention further defines the internal structure of a controller 90, the controller 90 comprising:
the resistance value setting module 91 is configured to set different resistance values for the first resistors and the second resistors, so that the equivalent resistance value of any x first resistors connected in parallel is not equal to the resistance value of any one of the first resistors or the second resistors, and the sum of the resistance values of any y second resistors is not equal to the equivalent resistance value of any one of the second resistors connected in parallel, nor is equal to the equivalent resistance value of any a first resistors connected in parallel, where x is greater than or equal to 2, y is greater than or equal to 2, and a is greater than or equal to 2.
Through the limitation to the first resistance and the second resistance, the sensitivity of the simultaneous damage and simultaneous uncovering detection of the plurality of channel cover plates can be improved.
As shown in fig. 9, in some preferred embodiments, the controller 90 further comprises:
a receiving module 92, wherein the receiving module 92 is configured to receive information transmitted by the analog-to-digital converter 80 in real time; the constant current source circuit is connected with an analog-to-digital converter for detecting a voltage value. Under the condition that any channel cover plate is not damaged, the first resistor is short-circuited by the lead; the resistance value of the first resistor is not effective in the main loop; if the wire in the channel cover plate is broken due to mechanical damage of the channel cover plate, the resistance value of the first resistor takes effect in the main loop, the resistance value on the main loop jumps, the constant current source circuit improves the voltage in order to maintain the current unchanged, and the analog-to-digital converter converts the monitored voltage signal into a digital signal and transmits the digital signal to the controller;
a first calculation module 93, wherein the first calculation module 93 is configured to calculate a resistance value according to the information received by the receiving module 92 in real time;
a second calculation module 94, said second calculation module 94 being configured for calculating in real time a current resistance value R1With the current resistance value R1The last resistance value R closest to0The difference △ R of (d);
a first determination module 95, the first determination module 95 configured to compare the difference △ R with a difference threshold △ R1By comparison, when △ R is more than or equal to △ R1Then, an instruction is sent to the fault determination module 96;
a memory module 96, wherein the memory module 96 is configured to store a corresponding resistance value when the channel cover is mechanically damaged or uncapped;
the method for calculating the resistance value stored in the storage module comprises the following steps:
when the recorded resistance value is the resistance value after two or more first resistors are connected in parallel, judging that the corresponding channel cover plate is damaged; when the recorded resistance value is the resistance value of a certain second resistor or the sum of the resistance values of a plurality of second resistors is equal, judging that the corresponding channel cover plate is opened;
and a fault judging module 97, wherein the fault judging module 97 is configured to judge whether the channel cover plate is mechanically damaged or uncapped according to the resistance value stored by the storage module.
As shown in fig. 10, the present invention further defines the failure determination module, and the failure determination module 97 includes:
a processing submodule 971, the calculation submodule 971 being configured for calculating a current resistance value R1And the current resistance value R stored in the memory module 961Difference △ R of nearest resistance value2And △ R2And difference threshold △ R1Comparing;
a first prompt submodule 974, the first prompt submodule 974 configured to issue a mechanically damaged or uncapped prompt signal according to the received instruction;
a second prompt submodule 975, the second prompt submodule 975 configured to signal a leakage.
Through injecing the fault judgment module, not only can detect out that the fault type is damaged or uncap, can detect out simultaneously whether the wire in the channel apron has the electric leakage condition, concrete detection flow is as follows:
setting n to be equal to 6, setting the numbers of the channel cover plates to be numbers 1 to 6, setting the numbers and the resistance values of the first resistors connected in parallel to the channel cover plates to be R1-1 to 50 Ω, R2-1 to 100 Ω, R3-1 to 200 Ω, R4-1 to 400 Ω, R5-1 to 800 Ω, and R6-1 to 3200 Ω, setting the numbers and the resistance values of the second resistors to be R1-2 to 50 Ω, R2-2 to 100 Ω, R3-2 to 200 Ω, R4-2 to 400 Ω, R5-2 to 800 Ω, and R6-1 to 3200 Ω, detecting the current resistance value R1 to be 800, setting the difference between the resistance values of the last resistor adjacent to be greater than 25 Ω, judging that a damage or uncovering phenomenon exists, and detecting the uncovering of the channel cover plate to be a cover plate number 5 because R1 to 800 Ω; when in use
Meanwhile, the damage of the No. 3 channel cover plate and the No. 4 channel cover plate is detected according to the characteristic that the No. 3 channel cover plate and the No. 4 channel cover plate are damaged simultaneously; when in use
Detecting the breakage of the No. 6 channel cover plate by using the characteristic of the breakage of the No. 6 channel cover plate; when in use
At this time, 199.20 Ω is close to 200 Ω stored in the memory, and 200-199.20 is 0.8 Ω < 25 Ω, and it can only be determined that the No. 2 channel cover plate is open; when in use
At the position of 400
1923.076 Ω is close to 2000 Ω stored in the memory module, and when 76.924 Ω > 25 Ω is 2000-1923.076, the channel cover plates No. 3 and No. 4 are damaged at the same time, and the existence of leakage is detected.
The present invention is not limited to the above-mentioned preferred embodiments, and any other products in various forms can be obtained by anyone in the light of the present invention, but any changes in the shape or structure thereof, which have the same or similar technical solutions as those of the present application, fall within the protection scope of the present invention.
Claims (8)
1. The channel cover plate is applied to a mechanical damage cover plate or cover opening detection device and is characterized by comprising a channel cover plate body (10), a lead (20) arranged in the channel cover plate body (10), a first resistor (30) connected with the lead (20) in parallel through a first connector and a joint (40) connected with the lead (20).
2. The channel cover according to claim 1, characterized in that the channel cover body (10) comprises a channel cover top surface (11) and ribs (12) arranged at the bottom of the channel cover top surface (11).
3. The detection device for mechanically damaging the channel cover plate or the cover is characterized by comprising n channel cover plates, n second resistors (50), a detection bus (60) and a detection assembly connected with the detection bus (60), wherein n is more than or equal to 1; each channel cover plate comprises a channel cover plate body (10), a lead (20) arranged in the channel cover plate body (10), a first resistor (30) connected with the lead (20) in parallel through a first connector, and a joint (40) connected with the lead (20); each second resistor (50) is connected with the joint (40); each of the second resistors (50) is connected in series through a sense bus (60).
4. A test device as claimed in claim 3, wherein the test assembly comprises a constant current source circuit (70) and an analog-to-digital converter (80) connected to one end of the test bus (60), the analog-to-digital converter (80) and the constant current source circuit (70) each being connected to a controller (90), the other end of the test bus (60) being connected to the analog-to-digital converter (80).
5. The detection apparatus according to claim 4, wherein the controller (90) comprises:
the resistance value setting module (91) is configured to set different resistance values for the first resistors and the second resistors, so that the equivalent resistance value of any x first resistors connected in parallel is not equal to the resistance value of any one of the first resistors or the second resistors, the sum of the resistance values of any y second resistors is not equal to the resistance value of any one of the second resistors nor equal to the equivalent resistance value of any a first resistors connected in parallel, wherein x is not less than 2, y is not less than 2, and a is not less than 2.
6. The sensing apparatus of claim 4, wherein the controller (90) further comprises:
a receiving module (92), the receiving module (92) being configured for receiving information transmitted by an analog-to-digital converter (80);
a first calculation module (93), the first calculation module (93) being configured for calculating a resistance value from the information received by the reception module (92);
a second calculation module (94), the second calculation module (94) being configured for calculating in real time a current resistance value R1With the current resistance value R1The last resistance value R closest to0The difference △ R of (d);
a first determination module (95), the first determination module (95) being configured for comparing the difference △ R with a difference threshold △ R1By comparison, when △ R is more than or equal to △ R1When the fault occurs, sending an instruction to a fault judgment module (97);
a memory module (96), the memory module (96) being configured to store a corresponding resistance value when a channel cover is mechanically damaged or uncapped;
a fault judgment module (97), wherein the fault judgment module (97) is configured to judge whether the channel cover plate is damaged mechanically or uncapped according to the resistance value stored by the storage module (96).
7. The detection apparatus according to claim 6, wherein the failure determination module (97) comprises:
a processing submodule (971), the calculation submodule (971) being configured for calculating a current resistance value R1And the current resistance value R stored in the memory module (96)1Difference △ R of nearest resistance value2And △ R2And difference threshold △ R1Comparing;
a first judgment sub-module (972) when △ R2＜△R1The first judging submodule (972) is configured to judge whether the current resistance value R is stored in the memory module (96) according to the current resistance value R1The closest resistance value judges whether the channel cover plate is mechanically damaged or uncapped and is also configured to send an instruction to a first prompting submodule (974);
a first prompt submodule (974), the first prompt submodule (974) being configured to signal a mechanically breached or uncapped in accordance with the received instruction.
8. The detection apparatus according to claim 7, wherein the failure determination module (97) further comprises:
a second judgment submodule (973) when △ R is detected2≥△R1The second determination submodule (973) is configured to determine the current resistance value R from the current resistance value R stored in the memory module (96)1The closest resistance value judges whether the channel cover plate is damaged mechanically or uncovered, and is also configured to be used for sending an instruction to a first prompting submodule (974) and a second prompting submodule (975);
a second prompt submodule (975), the second prompt submodule (975) being configured to signal a leakage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010065184.5A CN111089716A (en) | 2020-01-20 | 2020-01-20 | Channel cover plate and detection device for mechanically destroying cover plate or opening cover |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010065184.5A CN111089716A (en) | 2020-01-20 | 2020-01-20 | Channel cover plate and detection device for mechanically destroying cover plate or opening cover |
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| CN111089716A true CN111089716A (en) | 2020-05-01 |
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| CN202010065184.5A Pending CN111089716A (en) | 2020-01-20 | 2020-01-20 | Channel cover plate and detection device for mechanically destroying cover plate or opening cover |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112290501A (en) * | 2020-10-26 | 2021-01-29 | 北京思迈特科技有限公司 | Method for embedding sensing line in channel cover plate |
| CN112698335A (en) * | 2020-12-01 | 2021-04-23 | 国网湖北省电力有限公司宜昌供电公司 | Channel cover plate fault detection method |
| CN113985272A (en) * | 2021-11-08 | 2022-01-28 | 合肥巨一动力系统有限公司 | Trinity electricity drives protection detection device that uncaps |
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