CN201594005U - Sensor for detecting water level of water heater water tank and detection circuit - Google Patents
Sensor for detecting water level of water heater water tank and detection circuit Download PDFInfo
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- CN201594005U CN201594005U CN201020015282XU CN201020015282U CN201594005U CN 201594005 U CN201594005 U CN 201594005U CN 201020015282X U CN201020015282X U CN 201020015282XU CN 201020015282 U CN201020015282 U CN 201020015282U CN 201594005 U CN201594005 U CN 201594005U
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Abstract
The utility model discloses a sensor for detecting the water level of a water heater water tank and a detection circuit. The sensor comprises a jacket, a substrate is arranged in the jacket, a plurality of reed pipes arranged up and down are arranged on the substrate, and a connecting wire for outputting the status information of the reed pipes is led out to the jacket. The outer sleeve of the jacket is provided with magnetic floats. When the sensor is used for detecting the water level of a water tank, detection results are free from water quality influence. Sensor universality and detection accuracy are improved.
Description
Technical field
The utility model relates to a kind of liquid level sensor, specifically, relates to a kind of sensor that is used for the water-heater water tank water level detecting, belongs to sensor technical field.
Background technology
At present, solar water heater is when detecting cistern water level, and the sensor that adopts has three kinds usually, is respectively resistance sensor, capacitance type sensor and contact type sensor.
Resistance sensor is electric conductivity and the resistance characteristic that utilizes water, cooperates peripheral testing circuit to detect water level in the water tank.Its shortcoming is: on the one hand, such sensor construction complexity is damaged easily, and serviceable life is low; On the other hand, with water quality direct relation is arranged, the water quality of different PH can produce different measurement results, influences the accuracy of water level detecting, causes the sensor measurement precision lower, and versatility is relatively poor.
Capacitance type sensor is that the capacitance characteristic that utilizes water and sensor itself to form comes sensed water level.When water level changed, electric capacity changed, and perhaps capacitance characteristic changes, thereby detected water level in the water tank in conjunction with peripheral testing circuit.Its shortcoming is: on the one hand, the peripheral testing circuit complex structure that such sensor is required, cost is higher; On the other hand, similar with resistance sensor, with water quality direct relation is arranged, different water quality can produce different measurement results, influences the accuracy of water level detecting, causes the sensor measurement precision lower, and versatility is relatively poor.
The contact type sensor is that the position of corresponding different water levels is provided with several metallic contacts on water tank, when water level arrives this contact, connects this contact and common junction, utilizes the electric conductivity of water to detect the water level of water tank.Its shortcoming is: on the one hand, the contact type sensor bulk is bigger, need offer bigger hole on water tank, is unfavorable for the sealing and the insulation of water tank; On the other hand, the easy scaling of metallic contact, incrustation scale covers on the contact, influences the reaction sensitivity of contact, therefore, has reduced the detection sensitivity and the precision of sensor; In addition, still need to utilize the electric conductivity of water to measure, therefore, testing result still is subjected to the influence of water quality.
Summary of the invention
The purpose of this utility model is to provide a kind of sensor that is used for the water-heater water tank water level detecting, utilizes the tongue tube that is arranged in the sensor to realize the detection of cistern water level, solves the above-mentioned shortcoming and defect that existing sensor exists.
For solving the problems of the technologies described above, the utility model is achieved by the following technical solutions:
A kind of sensor that is used for the water-heater water tank water level detecting comprises sheath, is provided with substrate in the described sheath, and described substrate is provided with the tongue tube of several upper and lower layouts, and the connecting line that is used to export described tongue tube status information leads to described sheath; Described sheath is arranged with magnetic float outward.
According to the utility model, the center line of several tongue tubes of described upper and lower layout is located on the same line.
According to the utility model, be provided with at an end of described sheath and be used for sensor is fixed on installing component on the water-heater water tank.
According to the utility model, described sheath adopts plastic material to make.
Preferably, described sheath adopts acrylic plastering to make.
According to the utility model, described substrate is the PCB wiring board, and described tongue tube is welded on the described PCB wiring board.
Another purpose of the present utility model provides a kind of testing circuit that is used for the water-heater water tank water level detecting, is used to receive the signal of water-heater water tank level detection sensor, and exports corresponding water level information according to the signal of described sensor; Wherein, described sensor comprises sheath, is provided with substrate in the described sheath, and described substrate is provided with the tongue tube of several upper and lower layouts, and the connecting line that is used to export described tongue tube status information leads to described sheath; Described sheath is arranged with magnetic float outward;
Described testing circuit includes sensor unit and Main Processor Unit, described sensor unit include be connected in parallel between public power and the public ground, several parallel branch that way is identical with described tongue tube number, every road parallel branch includes the tongue tube and the regulating resistor of mutual series connection, and the detection signal sampling end of described Main Processor Unit is connected the tie point place between described tongue tube and the described regulating resistor.
According to the utility model, described regulating resistor can be the pull-up resistor form, and the one end is connected with described public power, and an end is connected with an end of described tongue tube.
Described regulating resistor also can be the pull down resistor form, and the one end is connected with described publicly, and an end is connected with an end of described tongue tube.
Compared with prior art, advantage of the present utility model and good effect are: tongue tube and magnetic float are set in the sensor of the present utility model, magnetic float fluctuates with SEA LEVEL VARIATION, when floating to corresponding tongue tube position, change the on off state of tongue tube, realize detection the water-heater water tank water level by the on off state that reads tongue tube.When utilizing this sensor cistern water level, on the one hand, testing result is not subjected to the influence of water quality, has improved the versatility and the accuracy of detection of sensor; On the other hand,, make sensor be difficult for scaling, improved the detection sensitivity and the serviceable life of sensor by adopting the sheath of specific materials; The 3rd, because this sensor output is the switch state signal of tongue tube, the relevant detection circuit only needs the detector switch signal to get final product, and circuit structure is simple, realize easily, and implementation is versatile and flexible.
Description of drawings
Fig. 1 is the structural representation that is used for an embodiment of sensor of water-heater water tank water level detecting described in the utility model;
Fig. 2 is the schematic diagram of first kind of sensor unit in the testing circuit described in the utility model sensor signal being detected;
Fig. 3 is the schematic diagram of second kind of sensor unit in the testing circuit described in the utility model sensor signal being detected;
Fig. 4 is the schematic diagram of the third sensor unit of in the testing circuit described in the utility model sensor signal being detected.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is described in detail.
Figure 1 shows that the structural representation that is used for an embodiment of sensor of water-heater water tank water level detecting described in the utility model.
As shown in Figure 1, sensor comprises sheath 6, is provided with substrate 2 in described sheath 6, and described substrate 2 is provided with 5 tongue tubes 1.Be provided with in the lower end of described sheath and be used for sensor is fixed on installing component 4 on the water-heater water tank, on described sheath, be arranged with magnetic float 3.The connecting line 5 that is used to export described tongue tube 1 status information leads to described sheath 6, and passes described installing component 4.
For preventing the sensor scaling, influence the detection sensitivity of sensor that described sheath adopts plastic material to make; Polypropylene (PP) plastics of preferably high temperature resistant, antiscale.
Described substrate 2 can adopt the PCB wiring board to realize, so that install and fix described tongue tube 1.When adopting the PCB wiring board, described tongue tube 1 is plug-in mounting or be welded on this wiring board directly.
Described 5 tongue tubes, 1 upper and lower being arranged on the described substrate 2, for reduce the volume of described substrate 2 as far as possible, to reduce the overall dimensions of sensor, the center line of described 5 tongue tubes 1 is located on the same line.
The quantity of described tongue tube 1 is provided with according to the needs of water-heater water tank water level stepping, needs several grades of water levels, and several tongue tubes then are set, and is not limited to 5 among this embodiment.
The principle of work of the sensor of this embodiment is: sensor upwards is inserted in the water tank from the water-heater water tank bottom, and by described installing component 4 sensor is installed in the water-heater water tank bottom, described connecting line 5 exposes to the water tank outside.When water level in the water tank rose or descend, described magnetic float 3 was along with water level fluctuates.When described magnetic float 3 floated to the position of certain tongue tube, under the action of a magnetic field, two reeds in this tongue tube were adhesive, and do not have two reeds of the tongue tube of the action of a magnetic field to separate.The on off state information of each tongue tube is by described connecting line 5 outputs, and the testing circuit of sensor just can detect the water level of current water tank by reading the on off state information of tongue tube.By designing the magnetic size of described magnetic float 3, guarantee all can have at any one time the reed adhesive of a tongue tube, promptly the on off state of corresponding tongue tube is a closure state, to guarantee accurately to detect the water level in the water tank.
When detecting the water-heater water tank water level, need the relevant detection circuit to cooperate with sensor, testing circuit is used to receive the signal of water-heater water tank level detection sensor, and exports corresponding water level information according to the signal of described sensor.The testing circuit that is used with sensor includes the sensor unit of detecting sensor signal and sensor signal is handled, exported the Main Processor Unit of water level information.
Fig. 2 is the schematic diagram of first kind of sensor unit in the testing circuit described in the utility model sensor signal being detected.Wherein, the similar among sensor construction and Fig. 1 embodiment, but be provided with 4 tongue tubes in the sensor.
As shown in Figure 2, the sensor unit includes 4 tunnel parallel branches that are connected in parallel between public power VCC and the public ground GND, is respectively: the 4th branch road that the 3rd branch road that second branch road that first branch road that tongue tube G1 and pull-up resistor R1 series connection form, tongue tube G2 and pull-up resistor R2 series connection form, tongue tube G3 and pull-up resistor R3 series connection form and tongue tube G4 and pull-up resistor R4 series connection form.In the parallel branch of every road, the corresponding signal sampling point in the tie point place between tongue tube and pull-up resistor, the detection signal sampling end of the Main Processor Unit in the connection detection circuit.Adopt the sensor unit of this structure, the sensor with 4 tongue tubes need be drawn 5 connecting lines, the bus as each tongue tube, the other end of other 4 respectively corresponding 4 tongue tubes.
When 4 tongue tube G1, G2, G3 and G4 all were in off-state, under the effect of pull-up resistor, each signal sampling end was all exported high level.Arrive wherein certain tongue tube position and work as magnetic float along with cistern water level, the tongue tube of corresponding position is with closure, and its corresponding signal sampling end will be exported a low level.The Main Processor Unit of testing circuit is gathered and is handled the signal of detection signal sampling end, can realize the detection to the different gear water levels of water tank.
Fig. 3 is the schematic diagram of second kind of sensor unit in the testing circuit described in the utility model sensor signal being detected.The pairing sensor construction of this schematic diagram is identical with sensor construction in Fig. 2 schematic diagram.Fig. 3 schematic diagram is identical with Fig. 2 schematic diagram ultimate principle, and difference is that resistance R 1, R2, R3 and the R4 in the parallel branch of every road is pull down resistor among Fig. 3.When tongue tube is in off-state, under the effect of pull down resistor, corresponding signal sampling end output low level.And when magnetic float arrived wherein certain tongue tube position along with cistern water level, the tongue tube of corresponding position was with closure, and its corresponding signal sampling end will be exported a high level.The Main Processor Unit of testing circuit is gathered and is handled the signal of detection signal sampling end, can realize the detection to the different gear water levels of water tank.
If the tongue tube number that is provided with in the sensor is more,, then need from sensor, to draw many connecting lines, and circuit structure also can more complicated if adopt above-mentioned Fig. 2 and the realization of Fig. 3 schematic diagram to the detection of sensor signal.The more sensor of corresponding tongue tube number can adopt the matrix-scanning mode that the dry-reed tube switch state in the sensor is detected.As shown in Figure 4, be the schematic diagram that adopts the third sensor unit that the matrix-scanning mode detects sensor signal.
In schematic diagram shown in Figure 4, the sensor that needs to detect comprises that 9 tongue tube G1-G9 are arranged, and 9 tongue tubes can adopt 3 * 3 matrixes to carry out switching signal scanning.In these 9 tongue tubes, tongue tube G1, G2 and G3 are positioned at 1 row, and one of them terminal of three is connected in parallel, and connect the scanning end of Main Processor Unit then by isolating diode D3; The other end of G1 is connected on the public power VCC by pull-up resistor R1, and the other end of G2 is connected on the public power VCC by pull-up resistor R2, and the other end of G3 is connected on the public power VCC by pull-up resistor R3.Tongue tube G4, G5 and G6 are positioned at 1 row, one of them terminal of three is connected in parallel, connect another scanning end of Main Processor Unit then by isolating diode D2, another terminal of three is connected on the public power VCC by pull-up resistor R1, R2 and R 3 respectively.Tongue tube G7, G8 and G9 are positioned at 1 row, one of them terminal of three is connected in parallel, connect another scanning end of Main Processor Unit then by isolating diode D1, another terminal of three is connected on the public power VCC by pull-up resistor R1, R2 and R3 respectively.
The principle of using the sensor detecting unit detection cistern water level is as follows: the Main Processor Unit in the testing circuit regularly sends low level sweep signal by the scanning end, and sweep signal is sent in turn at three line scanning ends.When 9 tongue tubes all were in off-state, under the effect of pull-up resistor, no matter whether sweep signal is arranged, three signal sampling ends were all exported high level.When magnetic float along with cistern water level arrives wherein certain tongue tube position, for example during tongue tube G5 place, tongue tube G5 is with closure.At this moment, if the low level sweep signal is positioned at the first line scanning end at D1 place, three signal sampling ends are all exported high level; If the low level sweep signal is positioned at the third line scanning end at D3 place, three signal sampling ends are also all exported high level.Only when the low level sweep signal is positioned at the second line scanning end at D2 place, because tongue tube G5 closure, the signal sampling end of its place branch road will be exported a low level, and all the other two signal sampling ends are still exported high level.Main Processor Unit is according to the level signal of detected signal sampling end, and in conjunction with the sweep signal that scans end, can judge is tongue tube G5 closure, and this moment, cistern water level was the pairing water level of tongue tube G5.
Utilize above-mentioned matrix-scanning testing circuit, the sensor of 9 tongue tubes only need be drawn 6 connecting lines and be got final product in testing circuit.If the sensor of 25 tongue tubes can adopt 5 * 5 matrix-scanning circuit realization sensor unit, this moment, sensor only need be drawn 10 connecting lines in testing circuit.If adopt the sensor unit among Fig. 2 or Fig. 3, then need to draw 26 connecting lines.Therefore, adopt the sensor unit of matrix-scanning form shown in Figure 4, more for a long time, can significantly reduce the extension line quantity of sensor, the circuit structure of simplification sensor unit in sensor tongue tube quantity.
Certainly, pull-up resistor R1, R2 among Fig. 4 and R3 also can adopt the form of pull down resistor, other circuit structures are identical with Fig. 4, at this moment, only need the corresponding scanning level signal that changes the scanning end, and the level signal of signal sampling end output also can change, and its principle of work and Fig. 4 are similar, repeat no more.
Certainly; the above only is a kind of preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (9)
1. sensor that is used for the water-heater water tank water level detecting, it is characterized in that, comprise sheath, be provided with substrate in the described sheath, described substrate is provided with the tongue tube of several upper and lower layouts, and the connecting line that is used to export described tongue tube status information leads to described sheath; Described sheath is arranged with magnetic float outward.
2. sensor according to claim 1 is characterized in that the center line of several tongue tubes of described upper and lower layout is located on the same line.
3. sensor according to claim 1 is characterized in that, is provided with at an end of described sheath to be used for sensor is fixed on installing component on the water-heater water tank.
4. sensor according to claim 1 is characterized in that, described sheath adopts plastic material to make.
5. sensor according to claim 4 is characterized in that, described sheath adopts acrylic plastering to make.
6. sensor according to claim 1 is characterized in that, described substrate is the PCB wiring board, and described tongue tube is welded on the described PCB wiring board.
7. testing circuit that is used for the water-heater water tank water level detecting, be used to receive the signal of water-heater water tank level detection sensor, and export corresponding water level information according to the signal of described sensor, it is characterized in that, described sensor comprises sheath, be provided with substrate in the described sheath, described substrate is provided with the tongue tube of several upper and lower layouts, and the connecting line that is used to export described tongue tube status information leads to described sheath; Described sheath is arranged with magnetic float outward;
Described testing circuit includes sensor unit and Main Processor Unit, described sensor unit include be connected in parallel between public power and the public ground, several parallel branch that way is identical with described tongue tube number, every road parallel branch includes the tongue tube and the regulating resistor of mutual series connection, and the detection signal sampling end of described Main Processor Unit is connected the tie point place between described tongue tube and the described regulating resistor.
8. testing circuit according to claim 7 is characterized in that, described regulating resistor one end is connected with described public power, and an end is connected with an end of described tongue tube.
9. testing circuit according to claim 7 is characterized in that, described regulating resistor one end is connected with described publicly, and an end is connected with an end of described tongue tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020015282XU CN201594005U (en) | 2010-01-14 | 2010-01-14 | Sensor for detecting water level of water heater water tank and detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020015282XU CN201594005U (en) | 2010-01-14 | 2010-01-14 | Sensor for detecting water level of water heater water tank and detection circuit |
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| Publication Number | Publication Date |
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| CN201594005U true CN201594005U (en) | 2010-09-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201020015282XU Expired - Fee Related CN201594005U (en) | 2010-01-14 | 2010-01-14 | Sensor for detecting water level of water heater water tank and detection circuit |
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| CN (1) | CN201594005U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102982653A (en) * | 2012-11-07 | 2013-03-20 | 中南大学 | Human body falling monitoring method and device based on acceleration and height information |
| CN103365310A (en) * | 2013-07-24 | 2013-10-23 | 襄垣县树元电器有限公司 | Water level control device for reservoir of curing chamber |
| CN107440526A (en) * | 2017-08-07 | 2017-12-08 | 四川红山红科技有限公司 | A kind of potable water tank heating control system and method |
| CN109115309A (en) * | 2018-09-10 | 2019-01-01 | 上海昂津实业有限公司 | Liquid level measurement system in a kind of seal case |
-
2010
- 2010-01-14 CN CN201020015282XU patent/CN201594005U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102982653A (en) * | 2012-11-07 | 2013-03-20 | 中南大学 | Human body falling monitoring method and device based on acceleration and height information |
| CN102982653B (en) * | 2012-11-07 | 2014-10-15 | 中南大学 | Human body falling monitoring method and device based on acceleration and height information |
| CN103365310A (en) * | 2013-07-24 | 2013-10-23 | 襄垣县树元电器有限公司 | Water level control device for reservoir of curing chamber |
| CN107440526A (en) * | 2017-08-07 | 2017-12-08 | 四川红山红科技有限公司 | A kind of potable water tank heating control system and method |
| CN109115309A (en) * | 2018-09-10 | 2019-01-01 | 上海昂津实业有限公司 | Liquid level measurement system in a kind of seal case |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100929 Termination date: 20110114 |