CN103445913A

CN103445913A - Baby urine alarm

Info

Publication number: CN103445913A
Application number: CN2013104300320A
Authority: CN
Inventors: 周云侠
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-09-22
Filing date: 2013-09-22
Publication date: 2013-12-18

Abstract

The invention relates to a baby urine alarm. The baby urine alarm is characterized by comprising a 6V direct-current power source, an urine detecting circuit, an inverse phase and filtering circuit and a buzzer driving circuit, wherein the urine detecting circuit consists of an urine sensing board GNB and a resistor R1; the inverse phase and filtering circuit consists of an NPN type transistor VT1, a resistor R2 and an electrolytic capacitor C1; and the buzzer driving circuit consists of an enhanced N groove field-effect transistor VT2 and a buzzer HA. When taking care of a baby, a mommy is required to frequently open the swaddling clothes of the baby to know whether the baby pees or not, or knows the baby pees after the swaddling clothes are drenched by urine or the baby cries; if an electronic device can constantly monitor the urine condition of the baby, and can remind the mommy of changing diapers in time, the small ass of the baby cannot be soaked by urine, the baby does not feel uncomfortable, and the sleeping quality, the growth and the development of the baby cannot be affected; and if the purpose is realized, the baby urine alarm can be highly praised by young parents certainly.

Description

Baby's informer of urinating

Technical field

The invention belongs to the application of electronic technology field, is about a kind of baby informer of urinating.

Background technology

Baby below two years old urinates and not controlled by brain; often can urinate wet diaper or trousers; so; during baby-mind; mother need to understand baby's situation of urinating, or mother opens continually baby's infancy and checks just and know whether and urinate, or urine is wet sometimes, drenched or baby cry just can be found; especially in cold winter in sky, allow very much baby's mother fathers beat one's brains to the thing of baby's changing babies' napkin.

If being arranged, individual electronic equipment can constantly monitor the baby when urinating, can remind in time mother more changing babies' napkin or diaper, baby's little hip just can not soaked uncomfortable and affect sleep quality and growth promoter by urine, night, young father and mother also can have a rest relievedly, if can achieve this end the high praise that is certain to be subject to young father and mother.

The baby of the present invention informer of urinating is all used the ordinary electronic element, and that circuit has is simple for structure, it is highly sensitive to detect urine.Facts have proved: baby's informer of urinating is the good assistant who cultivates the baby.

Below describe the baby of the present invention informer related relevant technologies content in implementation process of urinating in detail.

Summary of the invention

Goal of the invention and beneficial effect: during baby-mind, mother need to understand baby's situation of urinating, mother opens continually baby's infancy and checks just and know whether and urinate, sometimes urine wets, drenches or cry and scream and just can find, especially in cold winter in sky, allow very much mother fathers' head of baby large to the thing of baby's changing babies' napkin.

The circuit working principle: in the baby urinates the circuit diagram of informer, GNB is sense urine plate.Sense urine plate GNB is connected in circuit with soft lead-in wire, and will feel and urinate plate GNB and be placed on the appropriate location in baby diaper.

When sense urine plate GNB is in drying regime, sense urine plate GNB two ends disconnect basically, and in circuit, NPN transistor VT1 does not setover and, in cut-off state, enhancement mode N channel field-effect pipe VT2 is also in cut-off state, and buzzer HA does not work without electricity;

When the baby urinates sense urine plate GNB while running into urine, just there has been resistance at the two ends of sense urine plate GNB, its resistance is along with urine increases gradually, the resistance at sense urine plate GNB two ends diminishes rapidly, make so NPN transistor VT1 biasing circuit arranged and conducting, electrochemical capacitor C1 starts charging, the base voltage of NPN transistor VT1 rises, when the voltage rising reaches the conducting voltage of NPN transistor VT1, also conducting thereupon of enhancement mode N channel field-effect pipe VT2, buzzer HA must establish by cable and begin to pipe, and reminds the adult baby to urinate.

The electrochemical capacitor C1 that the grid G of enhancement mode N channel field-effect pipe VT2 connects, its effect is filtering, fixed ampllitude and time delay, it is to sense once in a while other signals and report phenomenon by mistake for fear of sense urine plate GNB.

Technical scheme: baby's informer of urinating, it comprises 6V DC source, urine detection circuit, paraphase and filter circuit, buzzer drive circuit, it is characterized in that:

The urine detection circuit: it is comprised of sense urine plate GNB and resistance R 1, the anodal VCC of a termination circuit of sense urine plate GNB, the end of the other end connecting resistance R1 of sense urine plate GNB, another termination paraphase and filter circuit of resistance R 1;

Paraphase and filter circuit: it is comprised of NPN transistor VT1, resistance R 2, electrochemical capacitor C1, the base stage of NPN transistor VT1 meets sense urine plate GNB by resistance R 1, the anodal VCC of the colelctor electrode connection circuit of NPN transistor VT1, the end of the emitter stage connecting resistance R2 of NPN transistor VT1 and the positive pole of electrochemical capacitor C1, the negative pole connection circuit ground GND of the other end of resistance R 2 and electrochemical capacitor C1;

Buzzer drive circuit: it is comprised of enhancement mode N channel field-effect pipe VT2 and buzzer HA, the grid G of enhancement mode N channel field-effect pipe VT2 connects the emitter stage of NPN transistor VT1, the drain D of enhancement mode N channel field-effect pipe VT2 connects the negative pole of buzzer HA, the anodal VCC of the anodal connection circuit of buzzer HA, the source S connection circuit ground GND of enhancement mode N channel field-effect pipe VT2;

The positive pole of 6V DC source is connected with circuit anode VCC, and the negative pole of 6V DC source is connected with circuit ground GND.

The accompanying drawing explanation

Accompanying drawing is to the invention provides the urinate embodiment circuit working schematic diagram of informer of a baby.

The specific embodiment

According to baby shown in the drawings urinate informer circuit working schematic diagram and accompanying drawing explanation, and according to annexation between components and parts in the described each several part circuit of summary of the invention, and the components and parts technical parameter described in embodiment requires and the circuit production main points are implemented to realize the present invention.Below in conjunction with embodiment, correlation technique of the present invention is further described.

The technical parameter of components and parts and selection requirement

VT1 is NPN transistor, and the model of selecting is 2SC9013, requires β >=160;

VT2 is enhancement mode N channel field-effect pipe, and the model of selecting is IRFZ22; Enhancement mode N channel field-effect pipe VT2 under conducting state, between the source S of enhancement mode N channel field-effect pipe VT2 and drain D pressure drop very little, its pressure drop can be ignored basically;

Resistance R 1 is 1/4 metalfilmresistor, and its resistance is 18K Ω; Resistance R 2 is 1/4 metalfilmresistor, and its resistance is 10K Ω;

C1 is electrochemical capacitor, and its capacity is 220 μ F/10V;

HA is buzzer, selects solderable and indoor design that audio generating circuit is arranged, and running voltage is 6V.

Making main points and the circuit debugging of circuit

The making of sense urine plate GNB: the outward appearance of sense urine plate GNB is interdigital shape, use the single face epoxy copper foil plate of 3 centimetres of 3 cm x, every 2 millimeters sharp pocket knives of use or scratch the Copper Foil of 1 mm wide with breaking saw blade, then burn-on respectively at the single face epoxy copperplate two ends flexible circuit conductor of 1 1.5 meters, then be connected to two wires respectively the two ends of sense urine plate GNB;

The baby informer sense urine plate GNB that urinates is put in to baby's diaper internal layer below, connects the 6V DC source, when the baby urinates, after sense urine plate GNB receives urine, the buzzer HA buzzing sound that can sound, close the 6V DC source, and buzzer can stop;

After sense urine plate GNB is dipped into urine, with napkin, dry sense urine plate GNB, can then use;

Sense urine plate GNB has been dipped into urine often, and the salt branch on sense urine plate GNB is long-pending many, easily makes the circuit prompting that makes a mistake, and available Warm Wash one is washed sense and urinated plate GNB, after then drying up with hot-air blower, can use again;

Resistance R 1 is for regulating the sensitivity of informer;

Resistance R 2 is for finely tuning the volume of buzzer HA.

Claims

1. the baby informer of urinating, it comprises 6V DC source, urine detection circuit, paraphase and filter circuit, buzzer drive circuit, it is characterized in that:

Described urine detection circuit is comprised of sense urine plate GNB and resistance R 1, the anodal VCC of a termination circuit of sense urine plate GNB, the end of the other end connecting resistance R1 of sense urine plate GNB, another termination paraphase and filter circuit of resistance R 1;

Described paraphase and filter circuit are comprised of NPN transistor VT1, resistance R 2, electrochemical capacitor C1, the base stage of NPN transistor VT1 meets sense urine plate GNB by resistance R 1, the anodal VCC of the colelctor electrode connection circuit of NPN transistor VT1, the end of the emitter stage connecting resistance R2 of NPN transistor VT1 and the positive pole of electrochemical capacitor C1, the negative pole connection circuit ground GND of the other end of resistance R 2 and electrochemical capacitor C1;

Described buzzer drive circuit is comprised of enhancement mode N channel field-effect pipe VT2 and buzzer HA, the grid G of enhancement mode N channel field-effect pipe VT2 connects the emitter stage of NPN transistor VT1, the drain D of enhancement mode N channel field-effect pipe VT2 connects the negative pole of buzzer HA, the anodal VCC of the anodal connection circuit of buzzer HA, the source S connection circuit ground GND of enhancement mode N channel field-effect pipe VT2;

The positive pole of described 6V DC source is connected with circuit anode VCC, and the negative pole of 6V DC source is connected with circuit ground GND.