CN209280091U - A kind of water level detection circuit based on pulse signal - Google Patents
A kind of water level detection circuit based on pulse signal Download PDFInfo
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- CN209280091U CN209280091U CN201920263254.0U CN201920263254U CN209280091U CN 209280091 U CN209280091 U CN 209280091U CN 201920263254 U CN201920263254 U CN 201920263254U CN 209280091 U CN209280091 U CN 209280091U
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Abstract
The utility model discloses a kind of water level detection circuits based on pulse signal, it is related to heating equipment field, solve the problems, such as that water-level detecting device precision is not high and perishable in the prior art, be characterized in that: one end of signal input and first resistor is electrically connected, and first resistor is connected to the second detecting electrode；Signal output is connected to one end of second resistance, the other end connection first resistor and first capacitor of second resistance, and the other end of first capacitor is come with connecting system power supply and the second capacitor, the other end of the second capacitor connect the first detecting electrode；The utility model is detected by using low-voltage alternating-current pulse signal, low frequency, low duty ratio intermittent series impulse signal when, weak electric signal hardly generates electrolysis to ponding, anode reaction etc. cause to detect probe be corroded, the ill-effect of the influence detection effect such as fouling, substantially increase the service life of system and the life cycle of product.
Description
Technical field
The utility model relates to heating equipment field more particularly to a kind of water level detecting electricity based on pulse signal
Road.
Background technique
With the development of combustion gas application technology, gas utensil product is in civilian, commercial kitchen area technical application and market development
Rapidly, especially gas-heating water heater and water heater product, have become at present it is widely known, with common people's life it is closely bound up,
Indispensable daily necessities.With advances in technology and the new period world to energy conservation, consumption reduction, environmental protection pressing needs,
Promoting the higher thermal efficiency, more environmentally-friendly efficient, low consumption, the gas-heating water heater of low emission and water heater product is the following hair
The certainty of exhibition, more efficiently, flue gas pollutant discharges lower condensation-type gas-fired heating water heater and condensing type water heater is exactly
It generates in this context, but when using this kind of product, when machine operation can generate a large amount of condensed water, regular situation
Under, because these condensed waters contain highly acid, environmental requirement does not allow machine to these condensed water direct emissions, to condensed water
Processing be usually be provided with inside the machine condensation water collection, in and tapping equipment, to guarantee effectively making for this device
With necessarily being detected and controlled automatically to condensed water level in device, to prevent condensed water from spilling into machine, so that seriously
Corrode machine, and that pollutes machine installs and uses environment, serious loss evil is caused to condensing complete product.
The device of sensed water level is more in industry at present, but is mostly using conventional water resistance detection method or other classes
As scheme, major drawbacks are first can not to overcome the problems, such as detection probe that detection accuracy is not high in wet condition, second
It can not effectively overcome the problems, such as that detection probe causes probe to corrode by the water electrolysis that signal generates, anode reaction etc..
Utility model content
The technical problems to be solved in the utility model is in view of the foregoing drawbacks, to provide a kind of water based on pulse signal
Position detection circuit inputs the pulse signal that can be freely arranged by this circuit, in circuit using the electric conductivity of condensed water
Signal output end detects different output signals, and whether the water accumulation level that can be determined in captation exceeded, according to this by
System makes corresponding protection processing, when water accumulation level is not up to warning line, can be detected in the signal output end of circuit
The almost the same pulse signal with input signal；When water accumulation level reaches warning line, detected in the signal output end of circuit
The signal arrived and input signal are completely inconsistent, and to solve, water-level detecting device precision is not high and perishable in the prior art is asked
Topic.
To achieve the above object, the utility model provides the following technical solutions:
A kind of water level detection circuit based on pulse signal, including signal input, signal output, the first electricity
Resistance, second resistance, first capacitor, the second capacitor, system power supply, the first detecting electrode and the second detecting electrode, signal input
Mouth and one end of first resistor are electrically connected by conducting wire, and first resistor is wired to the second detecting electrode；Signal is defeated
Outlet is wired to one end of second resistance, and the other end of second resistance connects first resistor and the first electricity by conducting wire
Hold, the other end of first capacitor is come with the second capacitor, the other end connection first of the second capacitor detects electric with connecting system power supply
Pole.
As further program of the utility model, signal input connects pulse signal transmitter, and signal output connects
Connect pulse signal detection device.
As further program of the utility model, second resistance is connected to what first resistor was connect with the second detecting electrode
One end.
As further program of the utility model, the first detecting electrode and the second detecting electrode are fixedly connected on the collection water capacity
Preset height in device.
As further program of the utility model, first capacitor is polarity free capacitor, and the second capacitor is electrolytic capacitor.
In conclusion the utility model has the advantages that compared with prior art
The utility model is detected by using low-voltage alternating-current pulse signal, and when frequency can basis for pulse signal duty
Need free setting, especially low frequency, low duty ratio intermittent series impulse signal when, weak electric signal is hardly to ponding
Generate electrolysis, anode reaction etc. cause to detect probe be corroded, the ill-effect of the influence detection effect such as fouling, be greatly improved
The service life of system and the life cycle of product.
Detailed description of the invention
Fig. 1 is the working principle diagram of the water level detection circuit based on pulse signal.
Appended drawing reference: 1- signal input, 2- signal output, 3- first resistor, 4- second resistance, 5- first capacitor,
The second capacitor of 6-, 7- system power supply, the first detecting electrode of 8-, the second detecting electrode of 9-, 10- collecting container, 11- liquid level.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment, based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
As shown in Figure 1, a kind of water level detection circuit based on pulse signal, including the output of signal input 1, signal
Mouthfuls 2, first resistor 3, second resistance 4, first capacitor 5, the second capacitor 6, system power supply ground the 7, first detecting electrode 8 and the second inspection
Survey electrode 9；
Signal input 1 connects pulse signal transmitter, for emitting detection signal, and signal input 1 and the first electricity
One end of resistance 3 is electrically connected by conducting wire, and first resistor 3 is wired at the second detecting electrode 9, the second detecting electrode
9 are fixedly connected on preset height in collecting container 10, and the second detecting electrode 9 is for detecting liquid level；
Signal output 2 connects pulse signal detection device, and for detecting pulse signal, and signal output 2 is by leading
Line is connected to one end of second resistance 4, and the other end of second resistance 4 connects first resistor 3 and first capacitor 5 by conducting wire, and
Second resistance 4 is connected to one end that first resistor 3 is connect with the second detecting electrode 9；
First capacitor 5 is polarity free capacitor, the other end of first capacitor 5 come with connecting system power supply 7 and second capacitor 6,
System power supply 7 ground connection, the second capacitor 6 be electrolytic capacitor, and the second capacitor 6 the other end connect the first detecting electrode 8, first
Detecting electrode 8 is fixedly connected in collecting container 10 and the mutually level position of the second detecting electrode 9.
In conclusion the working principle of the utility model is:
When inputting the pulse signal of default pulsewidth and frequency in signal input 1, if detected collecting container 10
In when there is no water or water level 11 to be not up to position contact with the first detecting electrode 8 and the second detecting electrode 9, detection carbon-point
It is in open-circuit condition between first detecting electrode 8 and the second detecting electrode 9, therefore can be detected and believe at 2 end of signal output
The almost the same pulse signal of the input signal of number input port 1；When water level 11 reaches and detection carbon-point in collecting container 10
When the position of the first detecting electrode 8 and the contact of the second detecting electrode 9, led between the first detecting electrode 8 and the second detecting electrode 9
Logical, the pulse signal of input after carbon-point the first detecting electrode 8 and the second detecting electrode 9, charges after testing to electrolytic capacitor 6,
It will test the pulse signal inconsistent with the input signal of signal input 1 at 2 end of signal output at this time.
The utility model is detected using low-voltage alternating-current pulse signal, and when frequency can be as needed for pulse signal duty
Freely be arranged, especially low frequency, low duty ratio intermittent series impulse signal when, weak electric signal hardly to ponding generate
Electrolysis, anode reaction etc. lead to detect that probe is corroded, fouling etc. influences the ill-effect of detection effect, are greatly improved system
Service life and product life cycle.
It should be strongly noted that using pulse signal detection water level for the innovative point of the application in the application, effectively
Solve the problems, such as that water-level detecting device precision is not high and perishable in the prior art.
While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art,
It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired
Change, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.
Claims (5)
1. a kind of water level detection circuit based on pulse signal, which is characterized in that defeated including signal input (1), signal
Export (2), first resistor (3), second resistance (4), first capacitor (5), the second capacitor (6), system power supply (7), first inspection
Electrode (8) and the second detecting electrode (9) are surveyed, signal input (1) and the one end of first resistor (3) are electrically connected by conducting wire,
First resistor (3) is wired to the second detecting electrode (9)；Signal output (2) is wired to second resistance
(4) other end of one end, second resistance (4) passes through conducting wire connection first resistor (3) and first capacitor (5), first capacitor (5)
The other end come with connecting system power supply (7) and the second capacitor (6), the other end of the second capacitor (6) connects the first detecting electrode
(8).
2. the water level detection circuit according to claim 1 based on pulse signal, which is characterized in that signal input
(1) pulse signal transmitter is connected, signal output (2) connects pulse signal detection device.
3. the water level detection circuit according to claim 2 based on pulse signal, which is characterized in that second resistance
(4) it is connected to one end that first resistor (3) is connect with the second detecting electrode (9).
4. the water level detection circuit according to claim 1 to 3 based on pulse signal, which is characterized in that first
Detecting electrode (8) and the second detecting electrode (9) are fixedly connected on collecting container (10) interior preset height.
5. the water level detection circuit according to claim 4 based on pulse signal, which is characterized in that first capacitor
It (5) is polarity free capacitor, the second capacitor (6) is electrolytic capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920263254.0U CN209280091U (en) | 2019-03-01 | 2019-03-01 | A kind of water level detection circuit based on pulse signal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920263254.0U CN209280091U (en) | 2019-03-01 | 2019-03-01 | A kind of water level detection circuit based on pulse signal |
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| CN209280091U true CN209280091U (en) | 2019-08-20 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110863979A (en) * | 2019-11-06 | 2020-03-06 | 江苏中车环保设备有限公司 | Polar liquid level drainage control system and control method |
-
2019
- 2019-03-01 CN CN201920263254.0U patent/CN209280091U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110863979A (en) * | 2019-11-06 | 2020-03-06 | 江苏中车环保设备有限公司 | Polar liquid level drainage control system and control method |
| CN110863979B (en) * | 2019-11-06 | 2021-07-09 | 江苏中车环保设备有限公司 | Electrode type liquid level drainage control system and control method |
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