CN102374884A - Full-automatic liquid level recognition gage and recognition method thereof - Google Patents
Full-automatic liquid level recognition gage and recognition method thereof Download PDFInfo
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- CN102374884A CN102374884A CN2010102645120A CN201010264512A CN102374884A CN 102374884 A CN102374884 A CN 102374884A CN 2010102645120 A CN2010102645120 A CN 2010102645120A CN 201010264512 A CN201010264512 A CN 201010264512A CN 102374884 A CN102374884 A CN 102374884A
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Abstract
The invention discloses a full-automatic liquid level recognition gage, comprising a CPU (Central Processing Unit) microprocessor, a power supply module, a power supply voltage stabilizing module, a protective output, a special sensor and an LED (Light-Emitting Diode) display module, wherein the protective output and the power supply voltage stabilizing module are respectively connected into the CPU microprocessor; the special sensor is connected into the CPU microprocessor through an integrating circuit module; the CPU microprocessor is connected with the LED display module through an amplification module; the power supply module is respectively connected with the protective output, the special sensor, the power supply voltage stabilizing module and the amplification module; and the power supply voltage stabilizing module is connected with the amplification module. In a recognition method for the full-automatic liquid level recognition gage, whether a voltage changes is determined by recognizing the voltage so as to determine the height of a liquid level, meanwhile, the alarm control can be performed, a liquid level condition is displayed and latched. The full-automatic liquid level recognition gage disclosed by the invention has the advantages of attractive and fashionable appearance, safety in protection, strong media flowability, wide cover area, long effective time, and wide pressure bearing face.
Description
Technical field
The present invention relates to a kind of content gauge, relate in particular to a kind of full-automatic identification content gauge, measurement, control and the alarm and protection of liquid such as the pond in the every profession and trade, water tank, fuel tank, particularly have the degree of depth of full-automatic distinguish containers, functions such as kind of liquid.
Background technology
The content gauge of at present domestic qualitative reflection liquid depth commonly used is broadly divided into following several types; Magnetic float-ball type, pressure transducer formula.Display packing has pointer-type, LED formula or liquid crystal type (seldom using).More than all kinds of instrument all exist and be badly in need of to solve and still unsolved problem.1, necessary supporting sensor of adapted of a kind of container or a certain liquid, different vessels or liquid can not exchange with other sensors and use.This pattern causes great inconvenience for the producer and user.The producer's product can't satisfy user's needs, and the user can't buy the product that can directly use, and has only to factory to customize.Make this product a large amount of on the one hand overstocked, the user can't in time buy suitable product again on the other hand; 2, the content gauge of LED indication exists at present; Problems such as the visual angle is little, difficult resolution under high light wire loop border, demonstration is unclear, display position is inaccurate; The double-deck function of general not low liquid level warning of the content gauge that 3, uses at present and protection.
Summary of the invention
Technical matters to be solved by this invention is: to above-mentioned prior art present situation, and a kind of different solutions, different device, different depth can discerned automatically is provided, promptly a sensor can be used in various solution, and the tank fill level of the various degree of depth is measured.Make full use of the anaclasis principle, have 180 ° of ultra wide visual angles, also can clearly differentiate in the sun.When in circuit, having designed existing 1/10 liquid level, the light warning function can be exported the different protection signal again, has widened application.Though powerful but simple in structure, this table volume little, function is many, easy to install.
The present invention solves the problems of the technologies described above the technical scheme that is adopted: a kind of full-automatic identification content gauge; Comprise CPU microprocessor, power module, power regulator module, protection output, sensor special, LED display module; Described protection output, power regulator module insert the CPU microprocessor respectively; Described sensor special inserts the CPU microprocessor through the integrating circuit module; Described CPU microprocessor is connected with the LED display module through amplification module, and described power module is connected with protection output, sensor special, power regulator module, amplification module respectively, and described power regulator module is connected with amplification module.
Said sensor special is special pressure transducer.
Said CPU microprocessor is an ATMEGA8L AVR single-chip microcomputer.
Said CPU microprocessor comprises signal gathering unit, protection output unit, signal sampling unit, identification decision unit, timing unit, processing unit, amplifying unit, demonstration output unit.Described signal sampling unit is connected with described identification decision unit; Described identification decision unit is connected with processing unit with described timing unit respectively; Described timing unit is connected with described processing unit; Described processing unit is connected with the protection output unit with described amplifying unit respectively, and described amplifying unit is connected with described demonstration output unit, and described signal gathering unit is connected with described processing unit.
A kind of recognition methods of full-automatic identification content gauge: the pressure transducer of signal sampling unit is delivered to identification decision unit after becoming the continually varying voltage signal to screen, collect to signal transition such as the solution properties of collecting, container shapes.
When but no change of voltage＜0.3v; Duration＞15 second, processing unit carries out analyzing and processing to signal, exports 0～5v continually varying voltage and delivers to each output port of CPU in order respectively; Time is 2 seconds one-periods; Show that 10 LED of output unit are luminous in turn successively this moment, and circulation is continuous, and prompt system is being carried out the identification decision program.
When voltage begins to change, the identification decision unit is delivered to processing unit to continually varying voltage on the one hand and is gone to continue to show in turn output, delivers to timing unit on the one hand and prepares the signal timing is handled; In this process, if the continually varying voltage signal stops to change, this moment, timing unit picked up counting; The signal no change that remains unchanged in 15 second time, be equivalent to liquid in container this moment fills with, and processing unit is then thought and is judged that identification is accomplished and signal carried out a series of computings such as logic, ratio; And stop to show in turn; The full signal of output liquid level, 10 LED are all luminous, and this signal latch; In using afterwards, the display system actual displayed be the true altitude of solution in the container.
Signal after demarcation is latched is not forever constant; Satisfying under the following condition; Latch signal automatically terminates, and carry out to judge recognizer again, when satisfy latch signal voltage＜0.3v but duration＞15 second, then remove latch signal and carry out and judge recognizer.
Signal gathering unit is gathered the signal of system; It is characterized in that showing when output unit also has 1/10 to show and just signal is delivered to processing unit; It is luminous to deliver to the yellow flashing led of protecting output unit to drive display unit on the one hand after the treated affirmation, carries out light and reports to the police; Can export the various control signal on the other hand.
The present invention has following remarkable advantages and beneficial effect:
1) liquid level shows can to realize carrying out accurately to any container, any liquid with a special pressure sensor and a CPU single-chip microcomputer, is exportable different low liquid level warning control signal through the ingenious combination of circuit.The existing many disadvantages of present content gauge have fundamentally been solved;
2) display brightness is high, and precision is good, function is strong;
3) dustproof and waterproof, be easy to install.
Description of drawings
Fig. 1 is a kind of structural representation of full-automatic identification content gauge;
Fig. 2 is a kind of CPU microprocessor circuit structural representation of full-automatic identification content gauge;
Fig. 3 is a kind of process flow diagram of recognition methods of full-automatic identification content gauge.
Embodiment
Like Fig. 1, shown in Figure 2: a kind of full-automatic identification content gauge; Comprise CPU microprocessor, power module, power regulator module, protection output, sensor special, LED display module; Described protection output, power regulator module insert the CPU microprocessor respectively; Described sensor special inserts the CPU microprocessor through the integrating circuit module; Described CPU microprocessor is connected with the LED display module through amplification module, and described power module is connected with protection output, sensor special, power regulator module respectively, and described power regulator module is connected with amplification module.
Said CPU microprocessor comprises signal gathering unit, protection output unit, signal sampling unit, identification decision unit, timing unit, processing unit, amplifying unit, demonstration output unit.Described signal sampling unit is connected with described identification decision unit; Described identification decision unit is connected with processing unit with described timing unit respectively; Described timing unit is connected with described processing unit; Described processing unit is connected with the protection output unit with described amplifying unit respectively, and described amplifying unit is connected with described demonstration output unit, and described signal gathering unit is connected with described processing unit.
Power supply arrives CPU microprocessor and amplification module through the power module input via power regulator module; Power supply is input as through power module and protects output and sensor special that power supply is provided simultaneously.Various extraneous interference have been eliminated in the use of two kinds of power supplys to the full extent, and sensor special is special pressure transducer, (BC-20) is installed in container bottom, have waterproof and dustproof, against shock characteristic, adapt under the rugged surroundings to use.Being characterized as of sensor special: voltage DC24V, output 0～5v, can be according to container depth, solution kind output unlike signal.Insert CPU microprocessor (23) pin PCO (PDCO) port through the integrating circuit module, accurately stably various containers, the essential information of all kinds of solution sends the CPU microprocessor to.
Described amplification module is through CPU; PDO～PBO～the PB2 drive signals that improve of totally 11 ports, luminous through showing that output unit drives different LED respectively as required.The demonstration output unit selects for use the super brightness light-emitting diodes high, is equipped with special reflection shield, makes that demonstration is brighter, clear.Power module provides working power for protection output; PC5 (SCL) port that protection output receives CPU microprocessor 1 come low liquid level signal; After handling amplification, can export various control, guard signal according to demands of different, go to drive various loads.
Recognition methods like Fig. 2, a kind of full-automatic identification content gauge shown in Figure 3: the pressure transducer of signal sampling unit is delivered to identification decision unit after becoming the continually varying voltage signal to screen, collect to signal transition such as the solution properties of collecting, container shapes.
When but no change of voltage＜0.3v; Duration＞15 second, processing unit carries out analyzing and processing to signal, exports 0～5v continually varying voltage and delivers to each output port of CPU in order respectively; Time is 2 seconds one-periods; Show that 10 LED of output unit are luminous in turn successively this moment, and circulation is continuous, and prompt system is being carried out the identification decision program.
When voltage begins to change, the identification decision unit is delivered to processing unit to continually varying voltage on the one hand and is gone to continue to show in turn output, delivers to timing unit on the one hand and prepares the signal timing is handled; In this process, if the continually varying voltage signal stops to change, this moment, timing unit picked up counting; The signal no change that remains unchanged in 15 second time, be equivalent to liquid in container this moment fills with, and processing unit is then thought and is judged that identification is accomplished and signal carried out a series of logical operations such as logic, ratio; And stop to show in turn; The full signal of output liquid level, 10 LED are all luminous, and this signal latch; In using afterwards, the display system actual displayed be the true altitude of solution in the container.
Logical operation is to form a fuzzy relation input signal and output signal to be transformed into mathematic(al) mode; After carrying out scale operation to this mathematic(al) mode, form the mathematical equation that an amplifying unit can discern and be Vo=k*Vi. and be latched in the CPU microprocessor internal.Scale-up factor K is a key of accomplishing full-automatic identification, because the powerful calculation function of single-chip microcomputer, the K value has very reflected input and the relation that shows output accurately, so this content gauge has high display precision.
Signal gathering unit is the signal of the demonstration output unit that collects; Delivering to processing unit selects; Confirm that low liquid level signal (1/10 liquid level) deliver to the protection output unit after the processing; It is luminous to drive yellow flashing led on the one hand, carries out light and reports to the police, can export the various control signal on the other hand.(can be as requested, the control signal that output meets the demands).Realized having the multifunctional solution bit table that light is reported to the police and output is controlled.
The latch signal Vo=k*Vi. that signal processing unit forms; It is characterized in that: this signal is all used in each start; Do not need identification decision once more; But latch signal is not (like this use will receive great limitation) of latching forever, in design, when satisfying following sufficient and necessary condition, automatically terminates latch signal and latchs and carry out again the judgement recognizer.One, input voltage necessary＜0.3v, two, 15 seconds duration, be provided with like this and solved in use many possible maloperations.In the latch signal Vo=k*Vi that forms is provided with, must satisfy on the other hand; The continually varying input voltage has stopped but duration＞15 second, solved in the use first time, when annotating solution issuable erroneous judgement disconnected, improved product reliability greatly.
What should explain at last is: above embodiment only in order to the explanation the present invention and and unrestricted technical scheme described in the invention; Therefore, although this instructions has carried out detailed explanation to the present invention with reference to each above-mentioned embodiment,, those of ordinary skill in the art should be appreciated that still and can make amendment or be equal to replacement the present invention; And all do not break away from the technical scheme and the improvement thereof of the spirit and the scope of invention, and it all should be encompassed in the middle of the claim scope of the present invention.
Claims (7)
1. automatically discern content gauge for one kind; Comprise CPU microprocessor, power module, power regulator module, protection output, sensor special, LED display module; It is characterized in that: described protection output, power regulator module insert the CPU microprocessor respectively; Described sensor special inserts the CPU microprocessor through the integrating circuit module, and described CPU microprocessor is connected with the LED display module through amplification module.
2. a kind of full-automatic identification content gauge according to claim 1; It is characterized in that: described power module is connected with protection output, sensor special, power regulator module, amplification module respectively, and described power regulator module is connected with amplification module.
3. a kind of full-automatic identification content gauge according to claim 1; It is characterized in that: said CPU microprocessor comprises signal gathering unit, protection output unit, signal sampling unit, identification decision unit, timing unit, processing unit, amplifying unit, demonstration output unit; Described signal sampling unit is connected with described identification decision unit; Described identification decision unit is connected with processing unit with described timing unit respectively; Described timing unit is connected with described processing unit; Described processing unit is connected with the protection output unit with described amplifying unit respectively, and described amplifying unit is connected with described demonstration output unit, and described signal gathering unit is connected with described processing unit.
4. a kind of full-automatic identification content gauge according to claim 1, it is characterized in that: said sensor special is special pressure transducer.
5. according to claim 1 or 3 described a kind of full-automatic identification content gauges, it is characterized in that: said CPU microprocessor is an ATMEGA8L AVR single-chip microcomputer.
6. a kind of full-automatic identification content gauge according to claim 3, it is characterized in that: said demonstration output unit is selected superhigh brightness LED for use, is provided with reflection shield.
7. the recognition methods of a full-automatic identification content gauge is characterized in that: the steps include:
Step 1: the pressure transducer of signal sampling unit is delivered to identification decision unit after becoming the continually varying voltage signal to screen, collect to signal transition such as the solution properties of collecting, container shapes;
Step 2: when but no change of voltage＜0.3v; Duration＞15 second, processing unit carries out analyzing and processing to signal, exports 0～5v continually varying voltage and delivers to each output port of CPU in order respectively; Time is 2 seconds one-periods; Show that 10 LED of output unit are luminous in turn successively this moment, and circulation is continuous, and prompt system is being carried out the identification decision program;
Step 3: when voltage begins to change, the identification decision unit is delivered to processing unit to continually varying voltage on the one hand and is gone to continue to show in turn output, delivers to timing unit on the one hand and prepares the signal timing is handled;
Step 4: if the continually varying voltage signal stops to change, this moment, timing unit picked up counting, the signal no change that remains unchanged in 15 second time; Processing unit is then thought and is judged that identification is accomplished and signal carried out a series of computings such as logic, ratio, and stops to show in turn the full signal of output liquid level; 10 LED are all luminous; And this signal latch, in using afterwards, the display system actual displayed be the true altitude of solution in the container;
Step 5: the signal of demarcating after latching but second is then removed latch signal and is carried out and judge recognizer in duration＞15 at voltage＜0.3v;
Step 6: signal gathering unit is gathered the signal of system; Show when output unit also has 1/10 to show and just signal is delivered to processing unit; It is luminous to deliver to the yellow flashing led of protecting output unit to drive display unit on the one hand after the treated affirmation, carries out light and reports to the police; Can export the various control signal on the other hand.
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| CN2010102645120A CN102374884A (en) | 2010-08-25 | 2010-08-25 | Full-automatic liquid level recognition gage and recognition method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105277252A (en) * | 2015-11-05 | 2016-01-27 | 北京奔驰汽车有限公司 | Automotive liquid level alarm device, automobile and automotive liquid level alarm method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1587859A (en) * | 2004-07-16 | 2005-03-02 | 金蔚东 | Correcting method for solar water heater capacitance water level sensor measuring value |
| CN201315026Y (en) * | 2008-12-15 | 2009-09-23 | 传力电子衡器(南京)有限公司 | Liquid level controller |
| CN201438125U (en) * | 2009-07-27 | 2010-04-14 | 北京新创三明科技有限公司 | Automatic liquid level monitoring system |
| CN201837428U (en) * | 2010-08-25 | 2011-05-18 | 上海博灿信号设备有限公司 | Full-automatic identification liquid level gauge |
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2010
- 2010-08-25 CN CN2010102645120A patent/CN102374884A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1587859A (en) * | 2004-07-16 | 2005-03-02 | 金蔚东 | Correcting method for solar water heater capacitance water level sensor measuring value |
| CN201315026Y (en) * | 2008-12-15 | 2009-09-23 | 传力电子衡器(南京)有限公司 | Liquid level controller |
| CN201438125U (en) * | 2009-07-27 | 2010-04-14 | 北京新创三明科技有限公司 | Automatic liquid level monitoring system |
| CN201837428U (en) * | 2010-08-25 | 2011-05-18 | 上海博灿信号设备有限公司 | Full-automatic identification liquid level gauge |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105277252A (en) * | 2015-11-05 | 2016-01-27 | 北京奔驰汽车有限公司 | Automotive liquid level alarm device, automobile and automotive liquid level alarm method |
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Application publication date: 20120314 |