CN218497627U

CN218497627U - Alarm capable of automatically sensing ambient light intensity

Info

Publication number: CN218497627U
Application number: CN202220735018.6U
Authority: CN
Inventors: 陈战东; 吴国彪
Original assignee: Guangxi University for Nationalities
Current assignee: Guangxi University for Nationalities
Priority date: 2022-03-31
Filing date: 2022-03-31
Publication date: 2023-02-17
Anticipated expiration: 2032-03-31

Abstract

The utility model relates to an electronic information technical field specifically is an automatic alarm of response surrounding environment luminous intensity. Including square box body, the both sides of box body top surface respectively are provided with a recess, each the recess liam is equipped with a photo resistance to constitute two light intensity check points, still be provided with alarm buzzer, power indicator, weak light pilot lamp and light intensity pilot lamp between two recesses, a box body side still is provided with shift knob, weak light warning adjust knob and highlight warning adjust knob, the another side of box body still is provided with the USB interface, and the box body is inside still to be provided with the light intensity detection warning circuit. The device has the advantages of small volume, simple structure, low cost, convenience for students or office staff to carry about and the like, can detect the illumination condition of the learning working environment timely and accurately, and effectively solves the problems of eye fatigue, myopia and the like caused by poor illumination.

Description

Alarm capable of automatically sensing ambient light intensity

Technical Field

The utility model relates to an electronic information technical field specifically is an automatic alarm of response surrounding environment luminous intensity.

Background

At present, the study and work tasks of primary and secondary school students and common office workers are heavy, the eyes are easy to be myopic when the eyes are used excessively, and the myopia of the eyes can be aggravated if the illumination of the surrounding environment is poor, such as too strong or too weak, during the study and work. Scientific research shows that the light intensity range suitable for reading and writing by human eyes is about 300-600Lux, the illumination condition of the learning and working environment of most people can change along with the change of time, weather and places, and once people carefully learn and work with full concentration, the change of the illumination condition can be ignored frequently. At present, special measuring equipment capable of measuring illuminance is available in the market, but the general size is large, the price is high, professional requirements are met during operation and use, the special measuring equipment is not convenient to carry about, and an alarm prompt function is not provided usually, so that the special measuring equipment is not suitable for common students or office staff.

SUMMERY OF THE UTILITY MODEL

To the problem, the utility model relates to an automatic alarm of response surrounding environment luminous intensity. Through the photosensitive characteristic of make full use of photo resistance and the switching characteristic of triode, mainly adopt two photo resistance as photosensitive element, four triodes are as on-off control component, three emitting diode and a bee calling organ are as audible and visual alarm suggestion, adopt nine conventional resistance as auxiliary component in addition, in addition carry out reasonable layout to above-mentioned electronic components, design a small in size, moreover, the steam generator is simple in structure, low cost, make things convenient for student or office personnel to carry the light intensity induction alarm who uses, can be immediately accurate the illumination condition who detects study operational environment, effectively solve because of the illumination is not good (weak or too strong) cause eyes tired scheduling problem.

The utility model adopts the technical proposal that:

the utility model provides an automatic alarm of response surrounding environment luminous intensity which characterized in that: including square box body, the both sides of box body top surface respectively are provided with a recess, each a photo resistance is equipped with in the recess to constitute two light intensity check points, be light intensity detection an, light intensity detection b respectively, still be provided with alarm buzzer, power indicator, light weak point pilot lamp and light intensity pilot lamp between two recesses, a box body side still is provided with shift knob, weak light warning adjust knob and highlight warning adjust knob, the another side of box body still is provided with the USB interface, the inside light intensity detection warning circuit that still is provided with of box body.

Further, the light intensity detection alarm circuit comprises a battery pack E, a first photoresistor PR1 and a second photoresistor PR2, a first path of the positive pole of the battery pack E is connected with a USB interface through a switch K, a second path of the positive pole of the battery pack E is connected with the anode of a first light emitting diode LED1 through the switch K, the cathode of the first light emitting diode LED1 is connected with the cathode of the battery pack E through a first resistor R1, the cathode of the battery pack E is grounded, a third path of the positive pole of the battery pack E is connected with the fixed end of a second sliding resistor R2 through the switch K and the first photoresistor PR1, the moving end of the second sliding resistor R2 is connected with the cathode of the battery pack E, the common end of the first photoresistor PR1 and the second sliding resistor R2 is connected with the base electrode of a first triode VT1 through a third resistor R3, a fourth path of the positive pole of the battery pack E is connected with the fixed end of a fourth sliding resistor R4 through the switch K, the moving end of the fourth sliding resistor R4 is connected with the negative electrode of the battery pack E through the second photoresistor PR2, the common end of the fourth sliding resistor R4 and the second photoresistor PR2 is connected with the base electrode of the second triode VT2 through the fifth resistor R5, the fifth path of the positive electrode of the battery pack E is connected with the collector electrode of the first triode VT1 through the switch K and the sixth resistor R6, the emitter electrode of the first triode VT1 is connected with the negative electrode of the battery pack E, the common end of the sixth resistor R6 and the collector electrode of the first triode VT1 is connected with the base electrode of the third triode VT3 through the eighth resistor R8, the sixth path of the positive electrode of the battery pack E is connected with the collector electrode of the second triode VT2 through the switch K and the seventh resistor R7, the emitter electrode of the second triode VT2 is connected with the negative electrode of the battery pack E, the common end of the seventh resistor R7 and the collector electrode of the second triode VT2 is connected with the base electrode of the fourth triode VT4 through the ninth resistor R9, the anodal seventh way of group battery E is connected with alarm buzzer H's positive input end through switch K, alarm buzzer H's negative input end is connected with second emitting diode LED 2's positive pole all the way, second emitting diode LED 2's negative pole is connected with third triode VT 3's collecting electrode, third triode VT 3's projecting pole is connected with group battery E's negative pole, another way of alarm buzzer H negative input end is connected with third emitting diode LED 3's positive pole, third emitting diode LED 3's negative pole is connected with fourth triode VT 4's collecting electrode, fourth triode VT 4's projecting pole is connected with group battery E's negative pole.

The working principle is as follows: the characteristic that the resistance value of the photoresistor changes along with the change of the illumination intensity and the switching characteristic of the triode are fully utilized, and when the illumination intensity is increased or decreased, the resistance value of the photoresistor gradually decreases or increases, so that the voltage division value of the photoresistor in a circuit is changed. And the on-off of the triode is controlled through the change of the partial pressure value, so that the light-emitting diode LED and the buzzer send out corresponding sound-light alarm prompts.

Further, the weak light alarm adjusting knob is connected with the moving end of the second sliding resistor R2, and the strong light alarm adjusting knob is connected with the moving end of the fourth sliding resistor R4.

The alarm threshold value is set by rotating the weak light alarm adjusting knob or the strong light alarm adjusting knob when the light is weak or strong.

Further, the power indicator is a first light emitting diode LED1 and is a green light emitting diode, the weak light indicator is a second light emitting diode LED2 and is a blue light emitting diode, and the light intensity indicator is a third light emitting diode LED3 and is a red light emitting diode.

Further, the first photo-resistor PR1 and the second photo-resistor PR2 are both dark resistors and have a resistance of 1M Ω.

Further, the first triode VT1, the second triode VT2, the third triode VT3 and the fourth triode VT4 are all NPN-type triodes.

Further, the battery pack E is a direct current 5V.

To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:

first, the utility model relates to an automatic alarm of response surrounding environment luminous intensity, can be real-time the light intensity change that accurately detects study operational environment, when the light intensity of environment is less than 300Lux or is higher than 600Lux, in time accurate send the too weak or too strong warning suggestion of light intensity, the illumination of reminding user's current environment is not good, avoid people's eyes to be in bad illumination environment for a long time, effectively reduce the probability that eyes myopia takes place, and the user can set for the alarm threshold value of weak light or highlight, satisfy its actual demand.

Second, the utility model relates to a scientific and reasonable, simple structure, carry and convenient to use, required electronic components all can purchase through market conventional channel, low price and energy-concerving and environment-protective, need not complicated technology during the preparation, but consequently mass production has the prospect of extensive application and popularization.

Drawings

In order to illustrate the embodiments of the present invention or the technical solutions in the prior art more clearly, the drawings required in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only some examples of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive step.

FIG. 1 is a schematic diagram of an alarm for automatically sensing the intensity of ambient light;

FIG. 2 is a top plan view of the alarm connected to an external data line;

FIG. 3 is a schematic diagram of a light intensity detection alarm circuit;

in the attached drawing, 1-box body, 2-alarm buzzer, 3-power indicator, 4-weak light indicator, 5-light intensity indicator, 6-USB interface, 7-switch button, 8-weak light alarm adjusting knob, 9-strong light alarm adjusting knob, 10-left light intensity detecting point, 11-right light intensity detecting point, and 12-USB plug of external data line.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the examples of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Example (b):

as shown in fig. 1, an alarm for automatically sensing the intensity of ambient light comprises a square box body, wherein two grooves are respectively arranged on two sides of the top surface of the box body, a photoresistor is installed in each groove, so that two light intensity detection points, namely a light intensity detection point a and a light intensity detection point b, are formed, an alarm buzzer, a power indicator, a light intensity indicator and a light intensity indicator are further arranged between the two grooves, the power indicator is a first light emitting diode LED1 and a green light emitting diode, the light intensity indicator is a second light emitting diode LED2 and a blue light emitting diode, the light intensity indicator is a third light emitting diode LED3 and a red light emitting diode, a switch button, a weak light alarm adjusting knob and a strong light alarm adjusting knob are further arranged on one side surface of the box body, a USB interface is further arranged on the other side surface of the box body, and a light intensity detection alarm circuit is further arranged in the box body;

as shown in fig. 3, the light intensity detection alarm circuit includes a battery pack E, a first photo-resistor PR1 and a second photo-resistor PR2, the battery pack E is a direct current 5V, the first photo-resistor PR1 and the second photo-resistor PR2 are both dark resistors and have a resistance of 1 Μ Ω, a first path of an anode of the battery pack E is connected to a USB interface via a switch K, a second path of an anode of the battery pack E is connected to an anode of a first light emitting diode LED1 via a switch K, a cathode of the first light emitting diode LED1 is connected to a cathode of the battery pack E via a first resistor R1, a cathode of the battery pack E is grounded, a third path of the anode of the battery pack E is connected to a fixed terminal of a second sliding resistor R2 via a switch K, a moving terminal of the second sliding resistor R2 is connected to a cathode of the battery pack E, a common terminal of the first photo-resistor PR1 and the second sliding resistor R2 is connected to a base of a first triode VT1 via a third resistor K, a collector of a fourth sliding resistor VT2 is connected to a collector of a fourth sliding resistor VT2 via a base of a triode VT2, a collector of a fourth sliding resistor VT2 is connected to a collector of a triode VT2, a collector of a fourth triode VT2 is connected to a collector of a triode VT2 via a collector of a triode VT, a triode VT2, a collector of the triode VT2 is connected to a collector of the triode VT2, a collector of the triode VT2 is connected to a collector of the triode VT3 via a collector of the triode VT3, a triode VT3, an emitting electrode of the second triode VT2 is connected with a negative electrode of a battery pack E, a common end of a seventh resistor R7 and a collector electrode of the second triode VT2 is connected with a base electrode of a fourth triode VT4 through a ninth resistor R9, a seventh path of a positive electrode of the battery pack E is connected with a positive input end of an alarm buzzer H through a switch K, one path of a negative input end of the alarm buzzer H is connected with an anode of a second light-emitting diode LED2, a cathode of the second light-emitting diode LED2 is connected with a collector electrode of a third triode VT3, an emitting electrode of the third triode VT3 is connected with a negative electrode of the battery pack E, the other path of the negative input end of the alarm H is connected with an anode of a third light-emitting diode LED3, a cathode of the third light-emitting diode LED3 is connected with a collector electrode of a fourth triode VT4, an emitting electrode of the fourth triode VT4 is connected with a negative electrode of the battery pack E, and the first triode VT1, the second triode VT2, the third triode VT3 and the fourth triode VT4 are NPN type triodes;

weak light warning adjust knob is connected with second sliding resistance R2's removal end, strong light warning adjust knob is connected with fourth sliding resistance R4's removal end.

The utility model discloses a working process as follows:

the switch K is closed, the battery pack supplies power, the light emitting diode LED1 emits green light, that is, the power indicator light is green, indicating that the circuit is normally powered on, or the switch is turned off, as shown in fig. 2, the device is connected with electronic equipment through an external data line, such as a notebook computer, and the external electronic equipment supplies power to the device.

When the illumination intensity of the environment where the alarm is located is less than 300Lux, namely the alarm is in a low light state, the resistance values of the photoresistor PR1 and the photoresistor PR2 are large, the resistance value of the photoresistor PR1 is large, so that the fixed end voltage of the sliding resistor R2 is lower than 0.7V, namely the base voltage of the triode VT1 is lower than 0.7V, at the moment, the triode VT1 is in a disconnected state, the collector of the triode VT1 is in a high potential, namely the base voltage of the triode VT3 is greater than 0.7V, therefore, the triode VT3 is conducted, the light emitting diode LED2 emits blue alarm light, namely the low light indicator light is on, and meanwhile, the buzzer emits alarm sound. The larger resistance of the photoresistor PR2 enables the voltage of the moving end of the sliding resistor R4 to be larger than 0.7V, namely the base voltage of the triode VT2 is larger than 0.7V, the triode VT2 is conducted, therefore, the collector of the triode VT2 is at a low potential, namely the base voltage of the triode VT4 is smaller than 0.7V, the triode VT4 is cut off, the light emitting diode LED3 does not emit light, namely the light intensity indicator lamp does not light.

When the illumination intensity of the environment where the alarm is located is larger than 600Lux, namely the alarm is in a strong light state, the resistance values of the photoresistors PR1 and PR2 are small, the resistance value of the photoresistors PR1 is small, the voltage of the fixed end of the sliding resistor R2 is higher than 0.7V, namely the voltage of the base electrode of the triode VT1 is higher than 0.7V, the triode VT1 is conducted, at the moment, the collector electrode of the triode VT1 is in a low potential, namely the voltage of the base electrode of the triode VT3 is smaller than 0.7V, the triode VT3 is cut off, the light emitting diode LED2 does not emit light, namely the light-weak indicating lamp does not emit light. The resistance of the photoresistor PR2 is small, so that the voltage of the moving end of the sliding resistor R4 is smaller than 0.7V, namely the base electrode of the triode VT2 is at a low potential, the triode VT2 is cut off, at the moment, the collector electrode of the triode VT2 is at a high potential, namely the base electrode voltage of the triode VT4 is larger than 0.7V, the triode VT4 is conducted, the light emitting diode LED3 emits red alarm light, namely the light intensity indicator light is on, and the buzzer emits alarm sound.

When the illumination intensity of the environment where the alarm is located is suitable, namely the environment is between 300Lux and 600Lux, the resistance values of the photoresistor PR1 and the photoresistor PR2 are moderate, the resistance value of the photoresistor PR1 is moderate, so that the voltage of the fixed end of the sliding resistor R2 is higher than 0.7V, namely the voltage of the base electrode of the triode VT1 is higher than 0.7V, the triode VT1 is conducted, at the moment, the collector electrode of the triode VT1 is at a low potential, namely the voltage of the base electrode of the triode VT3 is lower than 0.7V, the triode VT3 is cut off, and the light emitting diode LED2 does not emit light. Meanwhile, the resistance value of the photoresistor PR2 is moderate, so that the mobile terminal voltage of the sliding resistor R4 is larger than 0.7V, namely the base voltage of the triode VT2 is larger than 0.7V, the triode VT2 is conducted, at the moment, the collector electrode of the triode VT2 is at a low potential, namely the base voltage of the triode VT4 is smaller than 0.7V, the triode VT4 is cut off, the light-emitting diode LED3 does not emit light, namely, the weak light indicator lamp and the light intensity indicator lamp are not on at the moment, and meanwhile, the buzzer does not give out alarm sound.

If the alarm threshold value is set when the light is weak or the light intensity is strong, the resistance value of the sliding resistor R2 or the sliding resistor R4 can be changed by rotating the weak light alarm adjusting knob or the strong light alarm adjusting knob.

The above description is only for the preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements and the like made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides an automatic alarm of response surrounding environment luminous intensity which characterized in that: including square box body (1), the both sides of box body (1) top surface respectively are provided with a recess, each the recess liam is equipped with a photo resistance to constitute two light intensity detection points, be light intensity detection a (10), light intensity detection b (11) respectively, still be provided with alarm buzzer (2), power indicator (3), weak light pilot lamp (4) and light intensity pilot lamp (5) between two recesses, box body (1) a side still is provided with shift knob (7), weak light warning adjust knob (8) and highlight warning adjust knob (9), the another side of box body (1) still is provided with USB interface (6), box body (1) inside still is provided with light intensity detection warning circuit.

2. An alarm for automatically sensing the intensity of ambient light according to claim 1, wherein: the light intensity detection alarm circuit comprises a battery pack E, a first photoresistor PR1 and a second photoresistor PR2, wherein a first path of the anode of the battery pack E is connected with a USB interface through a switch K, a second path of the anode of the battery pack E is connected with the anode of a first light-emitting diode LED1 through the switch K, the cathode of the first light-emitting diode LED1 is connected with the cathode of the battery pack E through a first resistor R1, the cathode of the battery pack E is grounded, a third path of the anode of the battery pack E is connected with the fixed end of a second sliding resistor R2 through the switch K and the first photoresistor PR1, the moving end of the second sliding resistor R2 is connected with the cathode of the battery pack E, the common end of the first photoresistor PR1 and the second sliding resistor R2 is connected with the base electrode of a first triode VT1 through a third resistor R3, and a fourth path of the anode of the battery pack E is connected with the fixed end of a fourth sliding resistor R4 through the switch K, the moving end of the fourth sliding resistor R4 is connected with the negative electrode of the battery pack E through the second photoresistor PR2, the common end of the fourth sliding resistor R4 and the second photoresistor PR2 is connected with the base electrode of the second triode VT2 through the fifth resistor R5, the fifth path of the positive electrode of the battery pack E is connected with the collector electrode of the first triode VT1 through the switch K and the sixth resistor R6, the emitter electrode of the first triode VT1 is connected with the negative electrode of the battery pack E, the common end of the sixth resistor R6 and the collector electrode of the first triode VT1 is connected with the base electrode of the third triode VT3 through the eighth resistor R8, the sixth path of the positive electrode of the battery pack E is connected with the collector electrode of the second triode VT2 through the switch K and the seventh resistor R7, the emitter electrode of the second triode VT2 is connected with the negative electrode of the battery pack E, the common end of the seventh resistor R7 and the collector electrode of the second triode VT2 is connected with the base electrode of the fourth triode VT4 through the ninth resistor R9, the anodal seventh way of group battery E is connected with alarm buzzer H's positive input end through switch K, alarm buzzer H's negative input end is connected with second emitting diode LED 2's positive pole all the way, second emitting diode LED 2's negative pole is connected with third triode VT 3's collecting electrode, third triode VT 3's projecting pole is connected with group battery E's negative pole, another way of alarm buzzer H negative input end is connected with third emitting diode LED 3's positive pole, third emitting diode LED 3's negative pole is connected with fourth triode VT 4's collecting electrode, fourth triode VT 4's projecting pole is connected with group battery E's negative pole.

3. An alarm for automatically sensing the intensity of ambient light according to claim 1, wherein: weak light warning adjust knob (8) are connected with second sliding resistance R2's removal end, strong light warning adjust knob (9) are connected with fourth sliding resistance R4's removal end.

4. An alarm for automatically sensing the intensity of ambient light according to claim 1, wherein: the power supply indicating lamp (3) is a first light emitting diode LED1 and is a green light emitting diode, the weak light indicating lamp (4) is a second light emitting diode LED2 and is a blue light emitting diode, and the light intensity indicating lamp (5) is a third light emitting diode LED3 and is a red light emitting diode.

5. An alarm for automatically sensing the intensity of ambient light according to claim 2, wherein: the first photo-resistor PR1 and the second photo-resistor PR2 are both dark resistors and have resistance values of 1M omega.

6. An alarm for automatically sensing the intensity of ambient light according to claim 2, wherein: the first triode VT1, the second triode VT2, the third triode VT3 and the fourth triode VT4 are all NPN type triodes.

7. An alarm for automatically sensing the intensity of ambient light according to claim 2, wherein: the battery pack E is direct current 5V.