CN108931557B - Inspection well cover damage detection device and inspection well cover damage detection method - Google Patents
Inspection well cover damage detection device and inspection well cover damage detection method Download PDFInfo
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- CN108931557B CN108931557B CN201810642480.XA CN201810642480A CN108931557B CN 108931557 B CN108931557 B CN 108931557B CN 201810642480 A CN201810642480 A CN 201810642480A CN 108931557 B CN108931557 B CN 108931557B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
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- H—ELECTRICITY
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- H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
- H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
- H03K3/353—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of field-effect transistors with internal or external positive feedback
- H03K3/356—Bistable circuits
- H03K3/3565—Bistables with hysteresis, e.g. Schmitt trigger
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/25—Pc structure of the system
- G05B2219/25033—Pc structure of the system structure, control, syncronization, data, alarm, connect I-O line to interface
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Abstract
The invention discloses a method for damaging an inspection well coverA detection device and a detection method thereof. The detection device is characterized in that the detection lines are arranged in a concentric circle shape, the concentric circles are wound inwards from one external connection port, the heads and the tails of the adjacent concentric circles are connected into an arc surface through the detection lines, the detection line on the innermost layer is folded into an inflection point, and the other external connection port is ensured to be arranged outside the vertex of the arc surface on the outermost layer; the circuit consists of a sensor, a PMOS tube and a voltage source VCCFormed by series connection, an external port of the sensor and a voltage source VCCThe other external port is connected with the grid G of the PMOS tube, and the source S of the PMOS tube is connected with a voltage source VCCThe grid G of the PMOS tube passes through a diode D1Ground, the diode D1The cathode of the PMOS tube is upward, and one path of the drain electrode D of the PMOS tube passes through a diode D2The other path is connected with a Schmitt trigger ST. The detection device saves cost, is accurate in detection and can provide detection in real time.
Description
Technical Field
The invention relates to the field of well cover damage detection, in particular to a device and a method for detecting damage of an inspection well cover.
Background
If the urban ground inspection well cover cannot be replaced in time after being damaged, huge potential safety hazards can be left for pedestrians and passing vehicles, and even the life can be threatened in serious cases. The well lid damage detection device can send well lid damage alarm information to the control center at the first time and request replacement, thereby ensuring personal and property safety of the public to the maximum extent.
The detection of the damage of the inspection well cover by the prior art can be mainly divided into two categories. One type is a special inspection well cover which is redesigned after the inspection well cover is damaged, such as: CN 105201014A and CN 106841327A, through preset latticed or wave convolution's wire or metal film as breakage sensor in well lid inside, after the well lid is damaged, the metal film or the wire of relevant position will break thereupon, just so can judge through external interface voltage whether have the well lid damaged. The other type is that the sensor is added on the bottom surface of the well lid to detect the damage of the well lid, such as: CN206440654U used parallel metal film strip and pasted on the well lid bottom surface, then detected the break-make of metal strip with the method of digital circuit and judged whether the well lid has damaged. The circuit diagram disclosed in the patent publication No. CN206440654U is shown in fig. 1, and is characterized in that a conductive film strip is adhered to the bottom surface of the manhole cover to form a manhole cover damage detection sensor. The disadvantages with respect to the prior art described above are as follows: 1. the special well cover is needed to replace the existing well cover, and the replaced well cover can cause resource waste; 2. on the other hand, the well cover is put into again, so that the engineering cost is increased; 3. one detection circuit is required to be added for every more film, so that the circuit complexity is improved; 4. the detection circuit and the sensor film are always electrified to consume the energy of a power supply, so that the standby time of the battery power supply detection system is not favorably prolonged; 5. breakage parallel to the detection film is not well detected.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a detection device and a detection method for detecting the damage of an inspection well cover, which have low cost and ultra-low power consumption and can detect the damage of the inspection well cover in real time.
A detection device for detecting the damage of an inspection well cover comprises the inspection well cover, a sensor arranged on the back of the inspection well cover and a circuit communicated with the sensor, wherein the sensor comprises detection lines arranged in a concentric circle shape and external ports positioned at two ends of the detection lines, the concentric circles start from one external port and are wound inwards, the heads and the tails of the adjacent concentric circles are connected into an arc surface by the detection lines, the detection line at the innermost layer is folded into an inflection point, and the other external port is ensured to be positioned outside the vertex of the arc surface at the outermost layer; the circuit consists of a sensor, a PMOS tube and a voltage source VCCAre connected in series to form the sensorAn external port and a voltage source VCCThe other external port is connected with the grid G of the PMOS tube, and the source S of the PMOS tube is connected with a voltage source VCCThe grid G of the PMOS tube passes through a diode D1Ground, the diode D1The cathode of the PMOS tube is upward, and one path of the drain electrode D of the PMOS tube passes through a diode D2The other path is connected with a Schmitt trigger ST.
The improvement is that the detection line is composed of a conductive layer and an insulating layer wrapping the conductive layer; the conducting layer is made of copper wires or conducting adhesive tapes.
The improvement is that the material of the detection line is conductive graphite paper.
The improvement is that the concentric circles are equally or unequally spaced concentric circles.
The detection method of the inspection well cover damage detection device comprises the following steps: when the inspection well cover is intact, the detection wire is conducted, and the grid G of the PMOS tube is at a high level VCCThe PMOS tube is in a turn-off state, a drain D of the PMOS tube is at a low level, the output of a Schmitt trigger ST with forward characteristics is at a low level, otherwise, once a well cover is damaged and a detection lead 7 at a corresponding part is broken, a falling edge jump from a high level to a low level must appear on a grid G of the PMOS tube, the PMOS tube is switched into a turn-on state from a cut-off state, a rising edge jump from the low level to the high level appears on the drain D, a steep rising edge from the low level to the high level is formed after the Schmitt trigger is shaped, an interrupt response is triggered after an external interrupt response EI pin triggered by the rising edge sent to the MCU, and the MCU carries out subsequent alarming and maintenance request processing.
Has the advantages that:
compared with the prior art, the detection device has the advantages of simple structure, low cost, simple and reliable detection circuit and ultralow power consumption, can detect the damage of the well cover in real time, and can give an alarm and request subsequent maintenance treatment to the server side by the interrupt system MCU. The invention can avoid the loss of human and property caused by the damage of the well cover with less investment. The concrete expression is as follows:
1. the snake-shaped connected concentric circle detection sensor formed by the conducting wires has the advantages of simple structure, low cost and easy realization;
2. the radius of the concentric circle of the detection sensor is flexibly controlled, so that selective damage detection on the well lid is facilitated; in addition, the number of concentric circles can be increased according to needs, and the more concentric circles, the higher the detection sensitivity;
3. the detector is externally provided with only two electric connection ports, so that the detector is easy to use;
4. the port of the detector is connected in series between the power supply and the insulated grid of the MOS tube, so that the detection sensor is ensured to be always in a power-on state, no current is in a lead, the detection sensor works in a power loss-free state, and the standby time of a battery power supply system is favorably prolonged;
5. the P-channel MOS tube is selected to ensure that the PMOS is in a turn-off state under the conditions that the well cover is not damaged and the detection sensor is switched on, so that the power loss of the detection circuit is further reduced;
6. the detection circuit uses a Schmidt trigger ST to shape a detection waveform, a sensor corresponding to a rising edge in a final output waveform signal SchOut detects that the well lid is damaged, and EI interrupt response of a controller MCU is triggered by the rising edge signal, so that real-time processing of the control system on the damage of the well lid can be realized.
Drawings
FIG. 1 is a prior art block diagram;
FIG. 2 is a view of the back of a well cover with a detection sensor, 1-external port, 2-edge of the well cover, 3-detection line, 4-radius of concentric circles, 5-arc surface, 6-inflection point;
FIG. 3 is a non-uniformly distributed concentric circular detection sensor;
FIG. 4 is a cross-sectional view of a well lid with sensing lines, 9-the back of the well lid, 7-the conductive layer, 8-the insulating layer;
FIG. 5 is a circuit diagram of the inspection well cover breakage detection device;
fig. 6 is a simulation waveform of a circuit when a manhole cover breakage detection device detects a manhole cover breakage, in which (a) is a simulation waveform of a voltage change of a gate G of a PMOS transistor caused by a random breakage of a manhole cover, (b) is an input simulation waveform of a schmitt trigger, and (c) is a simulation waveform of a shaping output of the schmitt trigger.
Detailed Description
The present invention will be described in further detail below with reference to specific examples.
A detection device for detecting the damage of an inspection well cover comprises the inspection well cover, a sensor arranged on the back of the inspection well cover and a circuit communicated with the sensor, wherein the sensor comprises detection lines arranged in a concentric circle shape and external ports positioned at two ends of the detection lines, the concentric circles start from one external port and are wound inwards, the heads and the tails of the adjacent concentric circles are connected into an arc surface by the detection lines, the detection line at the innermost layer is folded into an inflection point, and the other external port is ensured to be positioned outside the vertex of the arc surface at the outermost layer; the circuit consists of a sensor, a PMOS tube and a voltage source VCCFormed by series connection, an external port of the sensor and a voltage source VCCThe other external port is connected with the grid G of the PMOS tube, and the source S of the PMOS tube is connected with a voltage source VCCThe grid G of the PMOS tube passes through a diode D1Ground, the diode D1The cathode of the PMOS tube is upward, and one path of the drain electrode D of the PMOS tube passes through a diode D2The other path is connected with a Schmitt trigger ST.
The detection method of the inspection well cover damage detection device comprises the following steps: when the inspection well cover is intact, the detection wire is conducted, and the grid G of the PMOS tube is at a high level VCCThe PMOS tube is in a turn-off state, a drain D of the PMOS tube is at a low level, the output of a Schmitt trigger ST with forward characteristics is at a low level, otherwise, once a well cover is damaged and a detection lead 7 at a corresponding part is broken, a falling edge jump from a high level to a low level must appear on a grid G of the PMOS tube, the PMOS tube is switched into a turn-on state from a cut-off state, a rising edge jump from the low level to the high level appears on the drain D, a steep rising edge from the low level to the high level is formed after the Schmitt trigger is shaped, an interrupt response is triggered after an external interrupt response EI pin triggered by the rising edge sent to the MCU, and the MCU carries out subsequent alarming and maintenance request processing.
Example 1
A kind ofThe inspection well cover damage detection device comprises an inspection well cover, a sensor arranged on the back of the inspection well cover and a circuit communicated with the sensor, wherein the sensor comprises detection lines arranged in a concentric circle shape and external ports positioned at two ends of the detection lines, the concentric circles start from one external port and are wound inwards, the heads and the tails of the adjacent concentric circles are connected into an arc surface by the detection lines, the detection line at the innermost layer is folded into an inflection point, and the other external port is ensured to be positioned outside the vertex of the arc surface at the outermost layer; the circuit consists of a sensor, a PMOS tube and a voltage source VCCFormed by series connection, an external port of the sensor and a voltage source VCCThe other external port is connected with the grid G of the PMOS tube, and the source S of the PMOS tube is connected with a voltage source VCCThe grid G of the PMOS tube passes through a diode D1Ground, the diode D1The cathode of the PMOS tube is upward, and one path of the drain electrode D of the PMOS tube passes through a diode D2The other path is connected with a Schmitt trigger ST. And arranging the detection lines according to the mode of figure 2 or figure 3, fixing the conductive adhesive tape on the back surface of the inspection well cover, adhering a layer of insulating adhesive tape on the surface of the conductive layer, and connecting the circuit according to the circuit diagram of figure 5, thereby obtaining the inspection well cover damage detection device.
Voltage source VCCDiode D of 5V1And a diode D2Select 1N4007, PMOS select SOT23 packaged AO3401, schmitt trigger ST select SN74LVC1G17, output of ST detection circuit SchOut access controller MCU external interrupt trigger pin EI.
Example 2
The same procedure as in example 1 was repeated, except that the detection line was modified to be a conductive graphite paper.
The above description is only a preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, and any simple modifications or equivalent substitutions of the technical solutions that can be obviously obtained by those skilled in the art within the technical scope of the present invention are within the scope of the present invention.
Claims (4)
1. A detection device for detecting the damage of an inspection well cover is characterized by comprising the inspection well cover, a sensor arranged on the back of the inspection well cover and a circuit communicated with the sensor, wherein the sensor comprises detection lines arranged in a concentric circle shape and external ports positioned at two ends of the detection lines, the concentric circles are wound inwards from one external port, the heads and the tails of the adjacent concentric circles are connected into an arc surface by the detection lines, the detection line at the innermost layer is folded into an inflection point, and the other external port is ensured to be positioned outside the vertex of the arc surface at the outermost layer; the circuit is formed by connecting a sensor, a PMOS (P-channel metal oxide semiconductor) tube and a voltage source VCC in series, wherein one external port of the sensor is connected with the voltage source VCC, the other external port of the sensor is connected with a grid G of the PMOS tube, a source S of the PMOS tube is connected with the voltage source VCC, the grid G of the PMOS tube is grounded through a diode D1, the cathode of a diode D1 is upward, one path of a drain D of the PMOS tube is grounded through a diode D2, and the other path of the drain D of the PMOS tube is externally connected with a Schmidt trigger ST; when the inspection well cover is intact, the detection lead is conducted, the grid G of the PMOS tube is at a high level VCC, the PMOS tube is in a turn-off state, the drain D of the PMOS tube is at a low level, and the output of the Schmitt trigger ST with the forward characteristic is at a low level; when the inspection well cover is damaged, the detection line at the corresponding position is broken, a falling edge jump from a high level to a low level appears on a grid G of a PMOS (P-channel metal oxide semiconductor) tube, the PMOS tube is switched into a conducting state from cut-off, a rising edge jump from the low level to the high level appears on a drain D, a steep rising edge from the low level to the high level is formed after the rising edge jump is shaped by a Schmitt trigger, an interrupt response is triggered after an external interrupt response EI pin triggered by the rising edge of a controller MCU, and the MCU carries out subsequent alarming and maintenance request processing.
2. The inspection well cover breakage detection device as claimed in claim 1, wherein the inspection line is composed of a conductive layer and an insulating layer wrapping the conductive layer; the conducting layer is made of copper wires or conducting adhesive tapes.
3. The inspection well cover breakage detection device as claimed in claim 1, wherein the detection line is made of conductive graphite paper.
4. The inspection well cover breakage detection device as claimed in claim 1, wherein the concentric circles are equidistant or non-equidistant concentric circles; the more the number of the concentric circles is, the higher the sensitivity of the inspection well cover damage detection is.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810642480.XA CN108931557B (en) | 2018-06-21 | 2018-06-21 | Inspection well cover damage detection device and inspection well cover damage detection method |
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| CN201810642480.XA CN108931557B (en) | 2018-06-21 | 2018-06-21 | Inspection well cover damage detection device and inspection well cover damage detection method |
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| CN108931557B true CN108931557B (en) | 2021-04-06 |
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| CN109811798B (en) * | 2019-03-06 | 2020-08-21 | 泰华智慧产业集团股份有限公司 | Method for detecting damage of road surface inspection well cover |
| CN110018200A (en) * | 2019-04-01 | 2019-07-16 | 黑凤梨供应链管理（上海）有限公司 | A kind of surface fracture detection structure |
| CN110095504B (en) * | 2019-06-10 | 2024-03-12 | 北京思迈特科技有限公司 | Channel cover plate, mechanical damage channel monitoring device and system based on Internet of things |
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| CN205051670U (en) * | 2015-02-09 | 2016-02-24 | 深圳市科曼医疗设备有限公司 | Fall electricity from opening control circuit |
| CN106442633A (en) * | 2016-11-25 | 2017-02-22 | 合肥大明节能科技股份有限公司 | Inspection well cover damage detection device and control method |
| CN106841327A (en) * | 2017-04-06 | 2017-06-13 | 重庆华伟沃电科技有限公司 | A kind of inspection well cover with damage testing sensor |
| CN208383783U (en) * | 2018-06-21 | 2019-01-15 | 盐城工学院 | A kind of detection device of inspection well cover breakage |
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Effective date of registration: 20230518 Address after: Zhu Lin Zhen Tang Wang Ji Zhen, Jintan District, Changzhou City, Jiangsu Province, 213200 Patentee after: CHANGZHOU JINTAN ENVIRONMENTAL PROTECTION EQUIPMENT Co.,Ltd. Address before: Yancheng City, Jiangsu Province Patentee before: YANCHENG INSTITUTE OF TECHNOLOGY |