CN208735289U - A kind of utilidor leak detecting device - Google Patents
A kind of utilidor leak detecting device Download PDFInfo
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- CN208735289U CN208735289U CN201821208500.4U CN201821208500U CN208735289U CN 208735289 U CN208735289 U CN 208735289U CN 201821208500 U CN201821208500 U CN 201821208500U CN 208735289 U CN208735289 U CN 208735289U
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Abstract
The utility model discloses a kind of utilidor leak detecting devices, belong to heat supply process field, including main control MCU, NB-IOT module, booster circuit, leak detection circuit, demodulator circuit and battery, the output end of main control MCU is connect with booster circuit input terminal, booster circuit output end is connect with the input terminal of leak detection circuit, the input terminal of the output end demodulator circuit of leak detection circuit connects, the input terminal of main control MCU and the output end of demodulator circuit connect, output end is connect with NB-IOT module input, power supply is connected as its power supply with main control MCU and NB-IOT module respectively.The utility model can automatically detect leakage and auto-alarming, participate in without artificial, can timely detect the generation of leakage, at low cost.
Description
Technical field
The utility model relates to heat supply process field, in particular to a kind of utilidor leak detecting device.
Background technique
In central heating field, heat distribution pipeline generally uses directly buried installation, and pipeline is generally divided into three layers from the inside to surface, respectively
It is working steel tube layer, polyurethane insulation coating, polyethylene protective layer, duct length 200m or so.Due to the underground that is laid in, Bu Nengji
Shi Faxian leakage, only when leakage is very big, artificial inspection could find breakthrough, cause maintenance lag and the energy
Waste.
Existing leak detection scheme generally realized using burying alarming line inside pipeline, periodically by staff with
Dedicated detection device alarming line is detected infer whether leakage.It is using the shortcomings that alarming line scheme:
First is that needing artificially periodically to go on-site test with special equipment, since scene does not power, generally supplied using big lithium battery
Electricity causes equipment very heavy, and the general high-temperature closed in scene has certain risk to the personal safety for the personnel that patrol.Second is that
It can not accomplish ceaselessly inspection for 24 hours, so not in time to the discovery of leakage, causing to cause bigger equipment damage even to surrounding
Pedestrian cause danger.
Utility model content
The purpose of this utility model is to provide a kind of utilidor leak detecting devices, timely to find heat distribution pipeline
Leakage scenarios.
In order to achieve the above object, the utility model uses a kind of utilidor leak detecting device, comprising: main control MCU,
NB-IOT module, booster circuit, leak detection circuit, demodulator circuit and battery, the output end and booster circuit of main control MCU are defeated
Enter end connection, booster circuit output end is connect with the input terminal of leak detection circuit, and the output end of leak detection circuit demodulates electricity
The input terminal on road connects, the input terminal of main control MCU and output end connection, output end and the NB-IOT module input of demodulator circuit
Connection, power supply are connected as its power supply with main control MCU and NB-IOT module respectively.
Further, the booster circuit includes boost converter, and the EN foot of boost converter accesses after connecting with VIN foot
Access boosting turns after one end of capacitor C4, the other end ground connection of capacitor C4, one end of inductance L1 and the anode connection of diode D1
The SW foot of parallel operation, the other end of inductance L1 access the voltage output end of the main control MCU, two poles after connecting with one end of capacitor C4
One end that the cathode of pipe D2 is consecutively connected to one end of resistance R4, is connected to one end of capacitor C1 and is connected to capacitor C3, resistance
The other end of R4 is respectively connected to the FB foot of boost converter and one end of resistance R6, resistance R6 after connecting with the other end of capacitor C1
The other end ground connection, capacitor C3 one end access 2.4V power supply, the other end ground connection, boost converter GND foot ground connection.
1, further, the leak detection circuit includes rectifier bridge D1, U3, step down switching voltage regulator U4 and single-chip microcontroller
U5；
The rectified bridge D1 of the voltage output end of the main control MCU forms voltage output end VB, voltage output end VB access electricity
One end of R7 is hindered, voltage output end VB is connected to the source electrode of PMOS tube Q1 simultaneously, and the other end of resistance R7 is connected respectively to U3's
The other end of one end and the grid for being connected to PMOS tube Q1, U3 is grounded；
When the grid and source voltage of PMOS tube Q1 are greater than cut-in voltage, PMOS tube Q1 is connected and forms rear end work electricity
It presses VZ, VZ to be connected to the emitter of triode Q7 and one end of R19, the emitter of the other end connecting triode Q8 of R19 and connects
The base stage of triode Q7, one end of connecting resistance R20, resistance R20 after the base stage of triode Q8 is connect with the collector of triode Q7
The other end ground connection, the collector of triode Q8 be respectively connected to voltage-stabiliser tube D5 cathode and access capacitor C8 anode, voltage-stabiliser tube
The anode of D5 and the cathode of capacitor C8 are grounded, and form voltage output end after the anode connection of the cathode and capacitor C8 of voltage-stabiliser tube D5
VIN；
The EN foot of step down switching voltage regulator U4 accesses after resistance R13 is connect with the IN foot of step down switching voltage regulator U4
The SW foot of the BST foot meridian capacitor C5 and step down switching voltage regulator U4 of voltage output end VIN, step down switching voltage regulator U4 connect
It connects, the SW foot of step down switching voltage regulator U4 connects one end of inductance L2 and the cathode of voltage-stabiliser tube D4, the anode of voltage-stabiliser tube D4 respectively
Ground connection, the other end of inductance L2 successively through capacitor C6 ground connection, through capacitor C7 be grounded and through one end of resistance R5, R6 one end after
Ground connection, the other end of R5 access voltage source VCC, and the FB foot of step down switching voltage regulator U4 accesses between resistance R5 and resistance R6,
The GND foot of step down switching voltage regulator U4 is grounded；
Voltage source VCC accesses the VDD foot of single-chip microcontroller U5, and the PA0 foot of single-chip microcontroller U5 is through the base of resistance R16 access triode Q6
The collector of pole, triode Q6 is connect with one end of resistance R18, and the other end ground connection of resistance R18, one end of resistance R18 is through electricity
The base stage of triode Q5 is accessed after resistance R17, the emitter of triode Q6 connects power supply VCC, the emitter ground connection of triode Q5, three poles
The collector of pipe Q5 is connect through resistance R10 with one end of resistance R9, and the other end of resistance R9 and one end of R19 connect, and R9's is another
One end is connect with the emitter of triode Q2, and one end of R9 is connect with the base stage of triode Q2, the collector of triode Q2 and three
The emitter of pole pipe Q3 connects, and the emitter of triode Q3 connects one end of voltage original V20 and resistance R8 respectively, and resistance R8's is another
End is respectively connected to the base stage of triode Q3 and the emitter of triode Q4, and the base stage of triode Q4 and the collector of triode Q3 connect
One end of rear connecting resistance R11, the other end ground connection of resistance R11 are connect, the collector of triode Q4 is grounded through resistance R14.
Further, the demodulator circuit includes detection resistance R2, comparator U2A and diode D3；
The output end of the booster circuit accesses the anode input of comparator U2A after detection resistance R2 forms voltage VBUS
End, the output end of the booster circuit access the anode of diode D3 after detection resistance R2, and the cathode of diode D3 successively passes through
Resistance R3 accesses one end of resistance R5, accesses the anode of capacitor C2, and the other end of resistance R5 and the cathode of capacitor C2 are grounded；
Hold the negative input of the anode access comparator U2A of C2, the output end of comparator U2A is accessed through pull-up resistor R1
The main control MCU, the output end of comparator U2A are also connected to the serial interface pin of main control MCU through RX_TTL.
Further, the main control MCU model STM32L053R8T6.
Further, leak detection circuit arranged for interval in pipe insulating layer.
Compared with prior art, there are following technical effects for the utility model: battery of the present invention is to main control MCU and NB-IOT
Module for power supply, main control MCU are usually in suspend mode, open booster circuit after timing wake-up and power to leak detection circuit, let out
Missing inspection slowdown monitoring circuit detects that the signal that can send 20mA when leakage occurs in bus, 20mA signal are demodulated by demodulator circuit
For TTL signal, when main control MCU receives this signal, warning message is sent to server and relevant people by NB-IOT module
Member.This programme can automatically detect leakage and auto-alarming, participate in without artificial, can timely detect the generation of leakage, at
This is low.
Detailed description of the invention
With reference to the accompanying drawing, specific embodiment of the present utility model is described in detail:
Fig. 1 is a kind of structural schematic diagram of utilidor leak detecting device；
Fig. 2 is booster circuit topological diagram；
Fig. 3 is leak detection circuit topology figure；
Fig. 4 is demodulator circuit topological diagram；
Fig. 5 is leak detection circuit scheme of installation.
Specific embodiment
In order to further explain the feature of the utility model, please refer to detailed description below in connection with the utility model with
Attached drawing.Institute's attached drawing is only for reference and purposes of discussion, is not used to limit the protection scope of the utility model.
As shown in Figure 1, present embodiment discloses a kind of utilidor leak detecting device, including main control MCU, NB-IOT mould
Block, booster circuit, leak detection circuit, demodulator circuit and battery, the output end and booster circuit input terminal of main control MCU connect
Connect, booster circuit output end is connect with the input terminal of leak detection circuit, the output end demodulator circuit of leak detection circuit it is defeated
Entering end connection, the input terminal of main control MCU and output end connection, output end and the NB-IOT module input of demodulator circuit connect,
Power supply is connected as its power supply with main control MCU and NB-IOT module respectively.
Wherein, battery is powered to main control MCU (model STM32L053R8T6) and NB-IOT module (model BC95),
Main control MCU is usually in suspend mode, opens booster circuit after timing wake-up and powers to leak detection circuit, leak detection circuit
Detect that the signal that can send 20mA when leakage occurs in bus, 20mA signal are demodulated into TTL signal by demodulator circuit,
When main control MCU receives this signal, warning message is sent to server and related personnel by NB-IOT module.
Further, as shown in Fig. 2, VBAT is the input voltage of battery, input voltage is laggard through electric capacity of voltage regulation C4 pressure stabilizing
Enter 5 feet to boost converter U1(model TPS61040), the 4th foot of U1 is connected to the 5th foot of U1, while VBAT is connected to
One end of inductance L1, the other end of L1 are connected to the 1st foot of U1, while being connected to one end of diode D2, the output connection of D2
To one end of R4, while it being connected to one end of C1 and C3, the voltage after resistance R4 and R6 partial pressure enters the 3rd foot of U1 as feedback
For filtering, capacitor C3 is used for pressure stabilizing for voltage, capacitor C1 and resistance R4 parallel connection, and the 2nd pin of U1 is grounded.
Further, as shown in figure 3, the structure of leak detection circuit are as follows: bus voltage forms voltage by rectifier bridge D1
VB, VB are connected to one end of resistance R7, while being connected to the end S of PMOS tube Q1, and the other end of resistance R7 is connected to one end of U3,
The other end of U3 is grounded, and for U3 by what is formed apart from two close probes, two probes are fixed on the base, two probes point
It Yin Chu not a conducting wire.It does not seep water when U3 is flat, the resistance value of U3 is very high, and the voltage of U3 is close to VB, due to the grid and source electrode of Q1
Voltage is less than cut-in voltage, so Q1 ends, when seeping water, the resistance value of U3 is reduced rapidly, and the voltage of U3 reduces, by
It is greater than cut-in voltage in the grid and source voltage of Q1, so that Q1 is connected, forms rear end operating voltage VZ, VZ and be connected to triode
The pole E of Q7, one end of R19, one end of R9 and the pole E of Q2, the pole E of the other end connection Q8 of R19, the pole B of Q8 connects resistance R20
One end, resistance R20 the other end ground connection, due to Q8 B pole tension be lower than Q8 E pole tension, so Q8 be connected, have electric current stream
Through resistance R19, so that the E pole tension of Q8 has part decline, since the pole E of Q8 is connected to the pole B of Q7, so the B of Q7 is extremely electric
Pressure can partially decline, and since the E pole tension of Q7 is greater than B pole tension, so Q7 is connected, the pole E of Q7 and the voltage difference of the pole B are about
0.7V, this voltage difference act on the both ends of R19, and R19 can flow through a fixed electric current, this electric current passes through the pole E and the pole C of Q8,
It is connected to the cathode of voltage-stabiliser tube D5 and the anode of capacitor C8, so that voltage VIN is formed, the plus earth of D5, the cathode ground connection of C8,
VIN connection step down switching voltage regulator U4(model MP2459GJ) the 5th foot, while connecting one end of resistance R13, resistance
The other end of R13 is connected to the 4th foot of U4, so that U4 can work normally, capacitor C5 is connected between the 1st foot of U4 and the 6th foot,
The negative terminal of the 6th foot connection Schottky diode D4 of U1, while one end of inductance L2 is connected, the other end of L2 connects electric capacity of voltage regulation
C6 and filter capacitor C7,3rd foot of the voltage VCC after resistance R15 and resistance R14 partial pressure into U4 after pressure stabilizing is as feedback letter
Number, VCC enters single-chip microcontroller U5(model STM8L001J3) the 4th foot provide voltage for U5.The 1st foot output high level of U5
When, this high level is connected to the pole B of PNP triode Q6 by resistance R16, and the pole E of Q6 meets VCC, so that Q6 ends, thus Q6
C extremely low level namely R18 on voltage be low level, this low level is connected to the B of NPN triode Q5 by resistance R17
Pole, the pole the E ground connection of Q5, so that Q5 ends, resistance R10 does not have electric current to flow through, and without pressure drop, the B pole tension of Q2 passes through resistance R9
It is pulled upward to VZ, causes the pole B of PNP triode Q2 and E pole tension equal, so that Q2 ends, voltage V20 is 0, the 20mA electricity of rear end
Stream does not work；When the 1st foot output of U5 is low level, this low level is connected to the pole B of PNP triode Q6 by resistance R16,
The pole E of Q6 meets VCC, so that Q6 is connected, so that the voltage on the C of Q6 extremely high level namely R18 is high level, this high level is logical
Cross the pole B that resistance R17 is connected to NPN triode Q5, the pole the E ground connection of Q5, so that Q5 is connected, the B pole tension of Q2 by resistance R9 and
R10 partial pressure obtains, and the B pole tension of Q2 is lower than the E pole tension of Q2, so that Q2 is connected, generates voltage V20, V20 connection resistance R8's
One end, the pole E of the other end connection Q4 of R8, one end of the pole the B connection resistance R11 of Q4, the other end ground connection of R11, due to the E of Q4
It is high in B pole tension, Q4 conducting, so that the E pole tension of Q4 declines, the pole E of Q4 is connected to the pole B of Q3, thus the B pole tension of Q3
Decline, since the E pole tension of Q3 is greater than the B pole tension of Q3, so that Q3 is connected, the pole E of Q3 and the voltage of the pole B are about 0.7V, this
The voltage of 0.7V is exactly the voltage at the both ends resistance R8, so that the electric current of resistance R8 is 07V/R8, the resistance value of R8 takes suitable value to make
Obtaining electric current is 20mA；Known by above-mentioned analysis: when the 1st foot output high level of U5, bus current does not increase；U5's
When the output of 1st foot is low level, bus increases the electric current of 20mA, and demodulator circuit demodulates the electric current of variation.
Further, as shown in figure 4, the structure of demodulator circuit are as follows: resistance R2 is formed the voltage V24 after boosting after testing
Voltage VBUS accesses the 3rd foot of comparator U2A, and VBUS connects the anode of diode D3 simultaneously, and the cathode of diode D3 connects electricity
One end of R3, one end of the other end connection resistance R5 of resistance R3 are hindered, while connecting one end of capacitor C2, while being connected to and comparing
The 2nd foot of device U2A, the 8th foot of comparator U2A connect V24, one end of the 1st foot connection pull-up resistor R1 of comparator U2A, electricity
The other end for hindering R1 connects VBAT, and VBUS is charged by D3, R3 to capacitor C2 when not communicating usually, and the voltage of C2 is close total
Line voltage VBUS causes have pressure drop on R2 when bus has the electric current of 20mA, and VBUS can be reduced, due to diode D3's
The voltage of one-way conduction characteristic, C2 will not reduce, the bus voltage before remaining, since the anode voltage of comparator U2A is low
In negative terminal voltage, comparator exports low level namely RX_TTL is low level；Comparator when bus does not have 20mA electric current
The anode voltage of U2A is higher than negative terminal voltage, and the first foot of comparator U2A exports high resistant, is pulled upward to VBAT by resistance R1, thus
RX_TTL is high level, and RX_TTL is connected to the serial interface pin of main control MCU.
Further, as shown in figure 5, L installs leak detection circuit, distance controlling at a certain distance in pipe insulating layer
The number of the nearest leak detection circuit of host is 1, and the number of farthest leak detection circuit is N, all leak detection electricity
Road uses common both threads connection control host, when some leak detection circuit M is leaked, the leak detection circuit
The number of oneself is sent to control host, the distance that control Framework computing goes out the leakage point distance controlling host is M × L, control
Host sends this information to server or informs related personnel by modes such as short messages.
Wherein, insulating tube includes external protection, insulating layer, anti-leakage layer three parts, and external protection material is polyethylene folder
Gram pipe or glass reinforced plastic or other materials.
It should be noted that in pipeline leakage testing device in the present embodiment, when any one detects position
When leakage, the detection circuit at this obtains power supply to work, and sends the location information at this to host to host, host is read
After getting the information, transmit this information on server or the mobile phone of related personnel.
The above is only the preferred embodiment of the present invention, is not intended to limit the utility model, all practical at this
Within novel spirit and principle, any modification, equivalent replacement, improvement and so on should be included in the guarantor of the utility model
Within the scope of shield.
Claims (6)
1. a kind of utilidor leak detecting device characterized by comprising main control MCU, booster circuit, is let out at NB-IOT module
The output end of missing inspection slowdown monitoring circuit, demodulator circuit and battery, main control MCU is connect with booster circuit input terminal, booster circuit output
End is connect with the input terminal of leak detection circuit, the input terminal connection of the output end demodulator circuit of leak detection circuit, main control MCU
Input terminal and the output end connection of demodulator circuit, output end and NB-IOT module input connect, power supply respectively with main control MCU
Its power supply is connected as with NB-IOT module.
2. utilidor leak detecting device as described in claim 1, which is characterized in that the booster circuit includes that boosting turns
Parallel operation, the EN foot of boost converter access one end of capacitor C4, the other end ground connection of capacitor C4, inductance L1 after connecting with VIN foot
One end and diode D1 anode connection after access the SW foot of boost converter, one end of the other end of inductance L1 and capacitor C4
The voltage output end of the main control MCU is accessed after connection, the cathode of diode D2 is consecutively connected to one end of resistance R4, is connected to
One end of capacitor C1 and the one end for being connected to capacitor C3, the other end of resistance R4 are respectively connected to after connecting with the other end of capacitor C1
The FB foot of boost converter and one end of resistance R6, the other end ground connection of resistance R6 are one end access 2.4V power supply of capacitor C3, another
One end ground connection, the GND foot ground connection of boost converter.
3. utilidor leak detecting device as described in claim 1, which is characterized in that the leak detection circuit includes whole
Flow bridge D1, U3, step down switching voltage regulator U4 and single-chip microcontroller U5；
The rectified bridge D1 of the voltage output end of the main control MCU forms voltage output end VB, and voltage output end VB accesses resistance R7
One end, voltage output end VB is connected to the source electrode of PMOS tube Q1 simultaneously, and the other end of resistance R7 is connected respectively to one end of U3
It is grounded with the other end of the grid for being connected to PMOS tube Q1, U3；
When the grid and source voltage of PMOS tube Q1 are greater than cut-in voltage, PMOS tube Q1 is connected and forms rear end operating voltage
VZ, VZ are connected to the emitter of triode Q7 and one end of R19, the emitter of the other end connecting triode Q8 of R19 and connect three
The base stage of pole pipe Q7, one end of connecting resistance R20 after the base stage of triode Q8 is connect with the collector of triode Q7, resistance R20's
Other end ground connection, the collector of triode Q8 are respectively connected to the cathode of voltage-stabiliser tube D5 and the anode of access capacitor C8, voltage-stabiliser tube D5
Anode and the cathode of capacitor C8 be grounded, form voltage output end after the anode connection of the cathode and capacitor C8 of voltage-stabiliser tube D5
VIN；
The EN foot of step down switching voltage regulator U4 accesses voltage after resistance R13 is connect with the IN foot of step down switching voltage regulator U4
The SW foot of the BST foot meridian capacitor C5 and step down switching voltage regulator U4 of output end VIN, step down switching voltage regulator U4 are connect, drop
The SW foot of die mould switching regulator U4 connects one end of inductance L2 and the cathode of voltage-stabiliser tube D4 respectively, the plus earth of voltage-stabiliser tube D4,
The other end of inductance L2 successively through capacitor C6 ground connection, through capacitor C7 be grounded and through one end of resistance R5, R6 one end after be grounded,
The other end of R5 accesses voltage source VCC, and the FB foot of step down switching voltage regulator U4 accesses between resistance R5 and resistance R6, voltage-dropping type
The GND foot of switching regulator U4 is grounded；
Voltage source VCC accesses the VDD foot of single-chip microcontroller U5, and the PA0 foot of single-chip microcontroller U5 accesses the base stage of triode Q6 through resistance R16,
The collector of triode Q6 is connect with one end of resistance R18, and the other end ground connection of resistance R18, one end of resistance R18 is through resistance
The base stage of triode Q5 is accessed after R17, the emitter of triode Q6 connects power supply VCC, the emitter ground connection of triode Q5, triode
The collector of Q5 is connect through resistance R10 with one end of resistance R9, and the other end of resistance R9 and one end of R19 connect, and R9's is another
End is connect with the emitter of triode Q2, and one end of R9 is connect with the base stage of triode Q2, the collector of triode Q2 and three poles
The emitter of pipe Q3 connects, and the emitter of triode Q3 connects one end of voltage original V20 and resistance R8, the other end of resistance R8 respectively
It is respectively connected to the base stage of triode Q3 and the emitter of triode Q4, the base stage of triode Q4 is connect with the collector of triode Q3
One end of connecting resistance R11 afterwards, the other end ground connection of resistance R11, the collector of triode Q4 are grounded through resistance R14.
4. utilidor leak detecting device as described in claim 1, which is characterized in that the demodulator circuit includes detection electricity
Hinder R2, comparator U2A and diode D3；
The output end of the booster circuit accesses the electrode input end of comparator U2A after detection resistance R2 forms voltage VBUS,
The output end of the booster circuit accesses the anode of diode D3 after detection resistance R2, and the cathode of diode D3 is successively through resistance
R3 accesses one end of resistance R5, accesses the anode of capacitor C2, and the other end of resistance R5 and the cathode of capacitor C2 are grounded；
Hold the negative input of the anode access comparator U2A of C2, the output end of comparator U2A is through described in pull-up resistor R1 access
Main control MCU, the output end of comparator U2A are also connected to the serial interface pin of main control MCU through RX_TTL.
5. utilidor leak detecting device as described in claim 1, which is characterized in that the main control MCU model
STM32L053R8T6。
6. utilidor leak detecting device as described in claim 1, which is characterized in that the leak detection circuit is in pipeline
Arranged for interval in insulating layer.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821208500.4U CN208735289U (en) | 2018-07-28 | 2018-07-28 | A kind of utilidor leak detecting device |
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| CN201821208500.4U CN208735289U (en) | 2018-07-28 | 2018-07-28 | A kind of utilidor leak detecting device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108843978A (en) * | 2018-07-28 | 2018-11-20 | 瑞纳智能设备股份有限公司 | A kind of utilidor leak detecting device |
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2018
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108843978A (en) * | 2018-07-28 | 2018-11-20 | 瑞纳智能设备股份有限公司 | A kind of utilidor leak detecting device |
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