CN103389141A - Water level alarm circuit applied to watering tool of thermal-humidity test chamber - Google Patents
Water level alarm circuit applied to watering tool of thermal-humidity test chamber Download PDFInfo
- Publication number
- CN103389141A CN103389141A CN2012101424350A CN201210142435A CN103389141A CN 103389141 A CN103389141 A CN 103389141A CN 2012101424350 A CN2012101424350 A CN 2012101424350A CN 201210142435 A CN201210142435 A CN 201210142435A CN 103389141 A CN103389141 A CN 103389141A
- Authority
- CN
- China
- Prior art keywords
- electrode
- power supply
- current
- water
- limiting resistance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The invention relates to a water level alarm circuit applied to a watering tool of a thermal-humidity test chamber. The water level alarm circuit comprises a power supply, an early warning branch circuit, a voice prompt branch circuit, a warning branch circuit, a first electrode, a second electrode and a third electrode, wherein the early warning branch circuit is used for prompting that the water level of the thermal-humidity test chamber reaches a first preset height; the voice prompt branch circuit is used for prompting that the water level of the watering tool of the thermal-humidity test chamber reaches the first preset height in voice; the warning branch circuit is used for prompting that the water level of the thermal-humidity test chamber reaches a second preset height; the first electrode is arranged at the bottom of the thermal-humidity test chamber; the second electrode is arranged by the first preset height at the thermal-humidity test chamber; the third electrode is arranged by the second preset height at the thermal-humidity test chamber; the positive electrode of the power supply is connected with the first electrode, the early warning branch circuit is connected with the second electrode, the voice prompt branch circuit is connected with the early warning branch circuit, and the warning branch circuit is connected with the third electrode. The water level alarm circuit disclosed by the invention has the advantages of capabilities of improving the work efficiency of workers and reducing the work intensity of the workers.
Description
Technical field
The present invention relates to a kind of water-level alarm circuit, relate in particular to a kind of moisture-heat test-box that is applied to and add the water-level alarm circuit of water conservancy project dress.
Background technology
society in scientific development, the electronic product speed of development is more and more faster, for guaranteeing the competitive power of product on market, superior other products, therefore product quality requires also just more and more higher, therefore the reliability requirement of product also improved gradually, reliability is that the requirement product is under the environment of regulation, in official hour, complete the function of regulation, especially China is an area that moisture is more serious, the damp heat test of product is important especially, the possible inefficacy mechanism of damp heat test comprises inferior quality metal material (iron rust), surface discolouration, the electronic product sealing property is bad causes inner cohesion steam to burn out circuit or parts, therefore all can carry out steady-state damp heat test or cyclic damp heat test according to the environment for use of product in product reliability testing scheme design process.Test condition all will reach a high temperature and humidity is carried out at the environment more than 90%, give like this incubator water consumption than very fast, and it is also more frequent to add water.Need people's keeping frequently to add water in adding the process of water, and add in the water process and can not do other things; Can in time not close swap switch after full and cause water to overfill if do other thing water, this has just caused personnel's test job inefficiency, and makes tester's fatigue strength also relatively large.
Summary of the invention
The technical problem to be solved in the present invention is to overcome in above-mentioned prior art and adds the water process and make the low problem of staff's work efficiency because of the need manual monitoring, and propose a kind of moisture-heat test-box that is applied to, adds the water-level alarm circuit of water conservancy project dress.
For solving the problems of the technologies described above, the present invention proposes a kind of moisture-heat test-box that is applied to and adds the water-level alarm circuit of water conservancy project dress, comprising: the first electrode, the second electrode, third electrode, power supply, in order to the water level of pointing out described moisture-heat test-box to add the water conservancy project dress arrive the early warning branch road of the first preset height, the water level that adds the water conservancy project dress in order to the described moisture-heat test-box of auditory tone cues reaches the auditory tone cues branch road of the first preset height and the warning branch road that reaches the second preset height in order to the water level of pointing out described moisture-heat test-box to add the water conservancy project dress; At the bottom of the first electrode was positioned at the case of moisture-heat test-box, the second electrode was positioned at the first preset height of moisture-heat test-box, and third electrode is positioned at the second preset height of moisture-heat test-box; Power supply comprises positive pole and negative pole, anodal first electrode that connects; The early warning branch road comprises the first light emitting diode, the first current-limiting resistance, the second current-limiting resistance and the first metal-oxide-semiconductor, the anode of the first light emitting diode is connected with the positive pole of power supply, the negative electrode of the first light emitting diode is connected to the drain electrode of the first metal-oxide-semiconductor by the first current-limiting resistance, be connected with the second current-limiting resistance between the grid of the first metal-oxide-semiconductor and the second electrode; The auditory tone cues branch road comprises hummer, normally closed switch, the 3rd current-limiting resistance and a NPN triode, one end of hummer connects the positive pole of power supply, the other end of hummer is connected to the collector of NPN triode by normally closed switch, be connected with the 3rd current-limiting resistance between the source electrode of the base stage of NPN triode and the first metal-oxide-semiconductor, the emitter of NPN triode connects the negative pole of power supply; The warning branch road comprises the second light emitting diode, the 4th current-limiting resistance, the 5th current-limiting resistance and the second metal-oxide-semiconductor, the anode of the second light emitting diode is connected with the positive pole of power supply, the negative electrode of the second light emitting diode is connected to the drain electrode of the second metal-oxide-semiconductor by the 4th current-limiting resistance, be connected with the 5th current-limiting resistance between the grid of the second metal-oxide-semiconductor and third electrode, the source electrode of the second metal-oxide-semiconductor connects the negative pole of power supply.
preferably, power supply also comprises power transformer, the bridge heap, the first filter capacitor, three-terminal voltage-stabilizing circuitron and the second filter capacitor, AC power connects the input end of power transformer, the input end of the output terminal connecting bridge heap of power transformer, be connected with the first filter capacitor between the first output terminal of bridge heap and the second output terminal, the input end of three-terminal voltage-stabilizing circuitron is connected with the first output terminal of bridge heap, the earth terminal of three-terminal voltage-stabilizing circuitron is connected with the second output terminal of bridge heap, be connected with the second filter capacitor between the output terminal of three-terminal voltage-stabilizing circuitron and earth terminal, the output terminal of three-terminal voltage-stabilizing circuitron is the positive pole of power supply, the earth terminal of three-terminal voltage-stabilizing circuitron is the negative pole of power supply.
Preferably, the three-terminal voltage-stabilizing pipe is 7812 three-terminal voltage-stabilizing pipes, and the output voltage of three-terminal voltage-stabilizing pipe is 12V.
Preferably, the first preset height is 4/5ths of moisture-heat test-box height.
Preferably, the second predeterminable range be the moisture-heat test-box height 95 percent to percentage 98.
Compared with prior art, beneficial effect of the present invention comprises: the present invention utilizes a kind of easy circuit, show water level and pre-alarm prompting, point out the tester after full water, the laboratory technician need not be at any time with the design of ball bearing made using always of keeping incubator quarter, advantage is simply and easily arranged, solved the not high problem of testing efficiency, reduced staff's fatigue strength.
Description of drawings
Fig. 1 is that the present invention is applied to moisture-heat test-box and adds the circuit theory diagrams of the water-level alarm circuit of water conservancy project dress.
Embodiment
In order to further illustrate principle of the present invention and structure, existing by reference to the accompanying drawings to a preferred embodiment of the present invention will be described in detail.
See also Fig. 1, the moisture-heat test-box that is applied to of the present invention adds the water-level alarm circuit of water conservancy project dress, comprising: the first electrode A, the second electrode B, third electrode C, power supply 1, early warning branch road 2, auditory tone cues branch road 3 and warning branch road 4.
At the bottom of the first electrode A was positioned at the case of moisture-heat test-box D, the second electrode B was positioned at the first preset height of moisture-heat test-box D, and third electrode C is positioned at the second preset height of moisture-heat test-box D.Power supply 1 comprises positive pole and negative pole, anodal first electrode A that connects.Early warning branch road 2, arrive the first preset height in order to the water level of pointing out moisture-heat test-box D to add the water conservancy project dress, it comprises the first LED 1, the first current-limiting resistance R1, the second current-limiting resistance R2 and the first metal-oxide-semiconductor Q2, the anode of light emitting diode is connected with the positive pole of power supply 1, the negative electrode of light emitting diode is connected to the drain electrode of the first metal-oxide-semiconductor Q2 by the first current-limiting resistance R1, be connected with the second current-limiting resistance R2 between the grid of the first metal-oxide-semiconductor Q2 and the second electrode B.Auditory tone cues branch road 3, the water level that adds the water conservancy project dress in order to auditory tone cues moisture-heat test-box D reaches the first preset height, it comprises hummer SP, normally closed switch SB, the 3rd current-limiting resistance R3 and a NPN triode VT, the end of hummer SP connects the positive pole of power supply 1, the other end of hummer SP is connected to the collector of NPN triode VT by normally closed switch SB, be connected with the 3rd current-limiting resistance between the base stage of NPN triode VT and the source electrode of the first metal-oxide-semiconductor Q2, the emitter of NPN triode VT connects the negative pole of power supply 1.Warning branch road 4, reach the second preset height in order to the water level of pointing out moisture-heat test-box D to add the water conservancy project dress, it comprises the second LED 2, the 4th current-limiting resistance R4, the 5th current-limiting resistance R5 and the second metal-oxide-semiconductor Q3, the anode of the second LED 2 is connected with the positive pole of power supply 1, the negative electrode of the second LED 2 is connected to the drain electrode of the second metal-oxide-semiconductor Q3 by the 4th current-limiting resistance R4, be connected with the 5th current-limiting resistance R5 between the grid of the second metal-oxide-semiconductor Q3 and third electrode C, the source electrode of the second metal-oxide-semiconductor Q3 connects the negative pole of power supply 1.
In other are implemented, also can select other emitting components to replace light emitting diode, such as the LED lamp by common replaces.The connected mode that also can copy the early warning branch road of warning branch road is connected with the auditory tone cues branch road.In a word, warning branch road and early warning branch road can show that it is in running order by the mode of sound or light prompting.
Describing this in detail below in conjunction with Fig. 1 is applied to moisture-heat test-box and adds the principle of work of the water-level alarm circuit of water conservancy project dress.
At first the first electrode A, the second electrode B and third electrode C frock are placed in moisture-heat test-box D, the electrode position of frock is also good according to the water tank depth design.Open and add taps, then give power on circuitry, it is alternating current that power supply carries out transformation through transformer T1, and then carry out rectification through the heap BD1 that passes a bridge and become direct supply, carry out filtering through the first filter capacitor C1, and then the DC voltage of process three-terminal voltage-stabilizing pipe Q1 stable output, then through the second filtering C2, due to voltage spikes is filtered.This moment, the grid of the first metal-oxide-semiconductor Q2, the second metal-oxide-semiconductor Q3 field effect transistor did not all have voltage, and the first LED 1, the second LED 2 are all not luminous.Increase along with water level, when water level arrives the first preset height of water tank, the first electrode A and the second electrode B are all at the same time in water, because the electric conductivity of water conducts A point and B point, this moment, the grid of the first metal-oxide-semiconductor Q2 was in high voltage, the first metal-oxide-semiconductor Q2 conducting, the first LED 1 is luminous, and the first LED 1 also has the first current-limiting resistance R1 to carry out current limliting in this process, the first metal-oxide-semiconductor Q2 has the second current-limiting resistance R2 to current limliting, and therefore the first metal-oxide-semiconductor Q2 and the first LED 1 can not be burned or puncture.This moment, electric current was through the 3rd current-limiting resistance R3 current limliting, triode VT conducting, and hummer SP starts to report to the police, and prompting water is about to fill it up with.When water continues to be added to third electrode C point, water level arrives the second preset height, the first electrode A point also conducts with third electrode C point, this moment, the grid of the second metal-oxide-semiconductor Q3 was in noble potential, the second LED 2 pilot lamp are bright, prompting water is filled it up with, and turns off normally closed switch SB, and hummer SP reports to the police and stops.Then turn off conduit switch, add water and stop, so just having completed the whole water process that adds.Wherein, the second metal-oxide-semiconductor Q3 has the 5th current-limiting resistance R5 to carry out current limliting, and the second LED 2 also has the 4th current-limiting resistance R4 to carry out current limliting, so the second metal-oxide-semiconductor Q3 and the second LED 2 can not be burned.
It is worth mentioning that, when the present invention is applied to water-level alarm circuit that moisture-heat test-box adds water conservancy project dress and specifically implements, the AC power of power supply access 220V, it is 7812 three-terminal voltage-stabilizing pipes that the three-terminal voltage-stabilizing pipe is selected model, the output voltage of three-terminal voltage-stabilizing pipe is 12V.The first preset height is 4/5ths of moisture-heat test-box height.Third electrode C should be positioned at the place, case top of moisture-heat test-box, add taps and cause the water spill-over to go out yet for fear of the workman, have insufficient time to close, can be set in place near the case of moisture-heat test-box top to the second preset height, for example 95 percent of the moisture-heat test-box height to percentage 98 places.
Compared with prior art, adopt the present invention to be applied to moisture-heat test-box and add the water-level alarm circuit of water conservancy project dress, the staff can do other things adding the water process to incubator like this, need not constantly observe, so just can increase work efficiency, also can not forget after water is filled it up with and overflow water tank because of do other things in to incubator, adding the water process, the problems such as waste resource, have also reduced staff's working strength.
The foregoing is only better possible embodiments of the present invention, not limit the scope of the invention.The equivalent structure that all utilizations instructions of the present invention and accompanying drawing content have been done changes, and all is included in protection scope of the present invention.
Claims (5)
1. one kind is applied to moisture-heat test-box and adds the water-level alarm circuit of water conservancy project dress, it is characterized in that, comprising:
The first electrode, the second electrode, third electrode, power supply, in order to the water level of pointing out described moisture-heat test-box to add the water conservancy project dress arrive the early warning branch road of the first preset height, the water level that adds the water conservancy project dress in order to the described moisture-heat test-box of auditory tone cues reaches the auditory tone cues branch road of the first preset height and the warning branch road that reaches the second preset height in order to the water level of pointing out described moisture-heat test-box to add the water conservancy project dress; At the bottom of described the first electrode was positioned at the case of described moisture-heat test-box, described the second electrode was positioned at the first preset height of described moisture-heat test-box, and described third electrode is positioned at the second preset height of described moisture-heat test-box;
Described power supply comprises positive pole and negative pole, described anodal described the first electrode that connects; Described early warning branch road comprises the first light emitting diode, the first current-limiting resistance, the second current-limiting resistance and the first metal-oxide-semiconductor, the anode of described the first light emitting diode is connected with the positive pole of described power supply, the negative electrode of described the first light emitting diode is connected to the drain electrode of described the first metal-oxide-semiconductor by described the first current-limiting resistance, be connected with described the second current-limiting resistance between the grid of described the first metal-oxide-semiconductor and described the second electrode;
Described auditory tone cues branch road comprises hummer, normally closed switch, the 3rd current-limiting resistance and a NPN triode, one end of described hummer connects the positive pole of described power supply, the other end of described hummer is connected to the collector of described NPN triode by described normally closed switch, be connected with described the 3rd current-limiting resistance between the source electrode of the base stage of described NPN triode and described the first metal-oxide-semiconductor, the emitter of described NPN triode connects the negative pole of described power supply;
Described warning branch road comprises the second light emitting diode, the 4th current-limiting resistance, the 5th current-limiting resistance and the second metal-oxide-semiconductor, the anode of described the second light emitting diode is connected with the positive pole of described power supply, the negative electrode of described the second light emitting diode is connected to the drain electrode of described the second metal-oxide-semiconductor by described the 4th current-limiting resistance, be connected with described the 5th current-limiting resistance between the grid of described the second metal-oxide-semiconductor and described third electrode, the source electrode of described the second metal-oxide-semiconductor connects the negative pole of described power supply.
2. water-level alarm circuit as claimed in claim 1, it is characterized in that, described power supply also comprises power transformer, the bridge heap, the first filter capacitor, three-terminal voltage-stabilizing circuitron and the second filter capacitor, AC power connects the input end of described power transformer, the output terminal of described power transformer connects the input end of described bridge heap, be connected with described the first filter capacitor between the first output terminal of described bridge heap and the second output terminal, the input end of described three-terminal voltage-stabilizing circuitron is connected with the first output terminal of described bridge heap, the earth terminal of described three-terminal voltage-stabilizing circuitron is connected with the second output terminal of described bridge heap, be connected with the second filter capacitor between the output terminal of described three-terminal voltage-stabilizing circuitron and earth terminal, the output terminal of described three-terminal voltage-stabilizing circuitron is the positive pole of described power supply, the earth terminal of described three-terminal voltage-stabilizing circuitron is the negative pole of described power supply.
3. water-level alarm circuit as claimed in claim 2, is characterized in that, described three-terminal voltage-stabilizing pipe is 7812 three-terminal voltage-stabilizing pipes, and the output voltage of described three-terminal voltage-stabilizing pipe is 12V.
4. water-level alarm circuit as claimed in claim 1, is characterized in that, described the first preset height is 4/5ths of described moisture-heat test-box height.
5. water-level alarm circuit as claimed in claim 1, is characterized in that, described the second preset height be described moisture-heat test-box height 95 percent to percentage 98.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101424350A CN103389141A (en) | 2012-05-09 | 2012-05-09 | Water level alarm circuit applied to watering tool of thermal-humidity test chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101424350A CN103389141A (en) | 2012-05-09 | 2012-05-09 | Water level alarm circuit applied to watering tool of thermal-humidity test chamber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103389141A true CN103389141A (en) | 2013-11-13 |
Family
ID=49533483
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101424350A Pending CN103389141A (en) | 2012-05-09 | 2012-05-09 | Water level alarm circuit applied to watering tool of thermal-humidity test chamber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103389141A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103604481A (en) * | 2013-11-21 | 2014-02-26 | 苏州立天机电有限公司 | Sensor |
-
2012
- 2012-05-09 CN CN2012101424350A patent/CN103389141A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103604481A (en) * | 2013-11-21 | 2014-02-26 | 苏州立天机电有限公司 | Sensor |
| CN103604481B (en) * | 2013-11-21 | 2016-08-24 | 苏州德瑞芬诺环境科技有限公司 | A kind of sensor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203490548U (en) | Simple water level controller for water treatment | |
| CN202838045U (en) | Country domestic water storage pond water level automatic controller | |
| CN103389141A (en) | Water level alarm circuit applied to watering tool of thermal-humidity test chamber | |
| CN202255641U (en) | Temperature warning direct-current circuit | |
| CN105302189A (en) | Greenhouse-used low-power consumption temperature control device | |
| CN203502448U (en) | Simple signal wave generator | |
| CN208092563U (en) | A kind of pool with fountain water level controller | |
| CN108092097A (en) | There is the power outlet of waterproofing protection | |
| CN204881870U (en) | Super temperature drop temperature warning circuit of thermostated container | |
| CN205909941U (en) | Low -temperature alarm ware based on triode temperature characteristic | |
| CN203444352U (en) | Fully-automatic electronic control water pumping device | |
| CN204498405U (en) | Based on the LED drive system that bootstrapping controls | |
| CN103927918B (en) | Automatic pumping demonstration device is controlled using triode | |
| CN203566108U (en) | Output current detection circuit of inverter welder based on alternating current signal | |
| CN207601651U (en) | A kind of fish tank water temperature automatic control circuit | |
| CN204832305U (en) | Weak current test automatic switching device | |
| CN209526702U (en) | A kind of three-wire type magnetic switch with surge protection function | |
| CN203590516U (en) | Constant current power supply open loop hiccup protection circuit | |
| CN203772791U (en) | Automatic famous and precious plant soil water shortage recognition alarm | |
| CN202503988U (en) | Automatic spray irrigation controller based on transistors | |
| CN203225728U (en) | Time relay based on integrated circuit | |
| CN205406872U (en) | Overvoltage protection power receptacle | |
| CN204990009U (en) | Farmland soil humidity automatic control circuit | |
| CN204989433U (en) | Take LED car light test circuit of excess temperature protection instruction | |
| CN206353198U (en) | A kind of LED indicating circuit for pointing out size of current |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20131113 |