CN206348470U - A kind of library seats supervising device - Google Patents
A kind of library seats supervising device Download PDFInfo
- Publication number
- CN206348470U CN206348470U CN201621242331.7U CN201621242331U CN206348470U CN 206348470 U CN206348470 U CN 206348470U CN 201621242331 U CN201621242331 U CN 201621242331U CN 206348470 U CN206348470 U CN 206348470U
- Authority
- CN
- China
- Prior art keywords
- seat
- resistance
- circuit
- emitting diode
- light emitting
- 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.)
- Withdrawn - After Issue
Links
- 238000012806 monitoring device Methods 0.000 claims description 6
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Landscapes
- Audible And Visible Signals (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The utility model discloses a kind of library seats supervising device, including trigger module, display module and circuit module, trigger module includes resistance strain gage RL, negative tempperature coefficient thermistor RNTC, display module include light emitting diode, display board, circuit module include controllable resistor R1, fixed value resistance R2, fixed value resistance R3, wherein, resistance strain gage RL, negative tempperature coefficient thermistor RNTCIn the groove for being arranged on each seat seat surface, mat is set at groove top-open.The utility model causes the luminous situation that the people into library can in advance according to each light emitting diode on wall display board outdoors, the particular location of idle seat is learnt in advance, it is convenient and swift, without looking for idle seat in turn, classmates' substantial amounts of valuable learning time is saved, while also improving the service efficiency of library seats.
Description
Technical Field
The utility model belongs to the technical field of the electronic equipment technique and specifically relates to just a library seat monitoring device.
Background
At present, the quantity of seats in study rooms of most colleges and universities in China is not matched with the quantity of students, every time an examination is taken, the library is full of people, people look far away to see that the library is full of people, people can find that some seats are actually not occupied by people only when the library is moved, if the people search for the free seats one by one, a large amount of valuable learning time of students can be wasted, meanwhile, the use efficiency of the seats in the library is also reduced, and the situation that the free seats can not be found similarly can also occur in public places such as cinemas, station waiting rooms and large conference rooms.
Disclosure of Invention
The utility model discloses to not enough among the prior art, the purpose provides one kind just can see the utilization condition of the inside self-study room seat outside the library, needn't get into the library and look for the seat monitoring device of idle seat one by one.
The utility model provides a technical scheme that above-mentioned technical problem adopted does:
a library seat monitoring device, characterized by: comprises a trigger module, a display module and a circuit module, wherein the trigger module comprises a resistance strain gauge RLNegative temperature coefficient thermistor RNTCThe display module comprises a light emitting diode and a display panel, and the circuit module comprises a controllable resistor R1Constant value resistance R2Constant value resistance R3Wherein, the resistance strain gauge RLNegative temperature coefficient thermistor RNTCIs arranged in a groove of each seat surface, a pad and a controllable resistor R are arranged at the opening of the groove1Constant value resistance R2Constant value resistance R3Is arranged on the wall.
Furthermore, a circuit is formed by the trigger module, the display module and the circuit module, and the circuit connection relationship is as follows:
two parallel branches are divided from the positive pole of the power supply in the circuit, and one branch is sequentially connected with a negative temperature coefficient thermistor R in seriesNTCResistance strain gauge RLConstant value resistance R2The other branch is sequentially connected with a controllable resistor R in series1Constant value resistance R3After the two branches are connected in parallel, the main circuit is connected in series with a switch, the switch is connected with the negative pole of the power supply, and the negative temperature coefficient thermistor RNTCResistance strain gauge RLA circuit and a controllable resistor R between1Constant value resistance R3The circuit at the position b is connected with a light emitting diode, the forward conduction direction of the light emitting diode is a to b, and all seats are electrically connectedThe paths are connected in parallel, the light emitting diode corresponding to each seat is arranged on a display board on the outer wall of the library door, and the position corresponding to the seat is marked below each light emitting diode on the display board.
The utility model discloses the beneficial effect who has does:
compared with the prior art, the utility model discloses a circuit comprises trigger module, display module and circuit module, when someone sat idle seat in the library, resistance strain gauge RLThe negative temperature coefficient thermistor R increases resistance value due to deformationNTCWhen the temperature of phi gradually rises to cause the resistance value to decreasea>ψbThe light emitting diode which is connected with the seat and arranged on the display board on the outer wall of the library door is conducted in the forward direction, and the light emitting diode emits light to indicate that the seat is occupied; on the contrary, when someone leaves the seat in the library, psia<ψbThe light emitting diode connected with the seat and arranged on the display board on the outer wall of the library door is turned off to indicate that the seat is not occupied; when someone leaves the seat temporarily, the negative temperature coefficient thermistor RNTCThe temperature of (2) is reduced for a certain time, and the light emitting diode is not immediately extinguished and is kept for a certain time.
People who get into the library can learn the concrete position of idle seat in advance according to each emitting diode's the luminous condition on the outer wall display panel of door, convenient and fast need not look for idle seat by one, practices thrift a large amount of valuable study time of classmates, also improves the availability factor of library seat simultaneously.
Drawings
The drawings are only for purposes of illustrating and explaining the present invention and are not to be construed as limiting the scope of the present invention. Wherein,
fig. 1 is a schematic diagram of the circuit structure of the present invention.
Detailed Description
In order to clearly understand the technical features, objects, effects and embodiments of the present invention, embodiments of the present invention will be described with reference to the accompanying drawings.
As shown in fig. 1, the monitoring device includes a triggering module, a display module and a circuit module, wherein the triggering module includes a resistance strain gauge RLNegative temperature coefficient thermistor RNTC，The display module comprises light emitting diode and display panel, and the circuit module comprises controllable resistor R1Constant value resistance R2Constant value resistance R3Wherein, the resistance strain gauge RLNegative temperature coefficient thermistor RNTCIs arranged in a groove of each seat surface, a pad and a controllable resistor R are arranged at the opening of the groove1Constant value resistance R2Constant value resistance R3The circuit of the utility model is composed of a trigger module, a display module and a circuit module, and the circuit connection relationship is as follows:
two parallel branches are divided from the positive pole of the power supply in the circuit, and one branch is sequentially connected with a negative temperature coefficient thermistor R in seriesNTCResistance strain gauge RLConstant value resistance R2The other branch is sequentially connected with a controllable resistor R in series1Constant value resistance R3The two branches are connected in parallel, then the main line is connected in series with a switch, the switch is connected with the negative pole of the power supply, in addition, the negative temperature coefficient thermistor RNTCResistance strain gauge RLA circuit and a controllable resistor R between1Constant value resistance R3The circuit at the position b is connected with the light emitting diode, the forward conduction direction of the light emitting diode is from a to b, the circuits of all seats are connected in parallel, the light emitting diode corresponding to each seat is arranged on a display board on the outer wall of the library door, and the position corresponding to the seat is marked below each light emitting diode on the display board.
The utility model is operated as follows,
resistance strain gauge RLThe strain effect is related to
ΔR=RK
Wherein, the delta R is the change value of the resistance wire;
k is a strain sensitivity coefficient;
is the relative change quantity delta L/L of the length of the resistance wire.
Negative temperature coefficient thermistor RNTCHas a temperature resistance relationship of
Rt=R*EXP(B*(1/T1-1/T2))
Wherein R istThe thermistor is at T1Resistance at temperature;
r is a thermistor at T2Nominal resistance at ambient temperature;
the B constant is a parameter determined by the thermistor due to materials;
EXP is the power of e to the n;
T1、T2is the Kelvin temperature.
The output voltage of the power supply is marked as U, and when the resistance strain gauge RLOr negative temperature coefficient thermistor RNTCWhen the resistance of (2) changes, the potential at the point a changes, then
ψa=U(R2+RL)/(RNTC+R2+RL)
ψb=U*R3/(R1+R3)
If psia>ψbThe light emitting diode emits light if psia<ψbOr psia=ψbThe light emitting diode does not emit light.
(1) When someone sits in the library in an idle seat,for the cushion and the resistance strain gauge R on the seatLPressure-generating, resistance strain gauge RLThe deformation causes the resistance value to increase, and simultaneously the heat of the human body is transferred to the negative temperature coefficient thermistor R through the cushion on the seatNTCNegative temperature coefficient thermistor RNTCAccording to phi, the resistance decreases with increasing temperaturea=U(R2+RL)/( RNTC+R2+RL) Known psiaIncrease, at this time psia>ψbThe light emitting diode which is connected with the seat and arranged on the display board on the outer wall of the library door is conducted in the forward direction, and the light emitting diode emits light to indicate that the seat is occupied;
(2) when a person leaves the seat in the library, the pad and the resistance strain gauge R on the seat are alignedLThe generated pressure disappears, and the resistance strain gauge R disappearsLThe deformation is recovered to reduce the resistance value, and simultaneously, the human body is transmitted to the negative temperature coefficient thermistor R through the cushion on the seatNTCThe heat of the thermistor R is gradually dissipatedNTCGradually decreases in temperature, and increases in resistance with decreasing temperature, according toa=U(R2+RL)/( RNTC+R2+RL) Known psiaDecrease when psia=ψbOr psia<ψbWhen the seat is not occupied, the light emitting diode connected with the seat and arranged on the display board on the outer wall of the library door is turned off to indicate that the seat is not occupied;
(3) when someone leaves the seat temporarily, the negative temperature coefficient thermistor RNTCThe temperature of (1) is lowered by a time required only when the temperature is lowered to a temperature at which the negative temperature coefficient thermistor R can be caused to fallNTCWill be such that the resistance value of
ψa=ψbEven psia<ψbThe led will go off, and the time period is the seat retention time.
The room temperature environment of the library is different due to different seasons, and the electricity can be controlledResistance R1The resistance value of (2) is adjusted with different room temperature environments.
People who get into the library can learn the concrete position of idle seat in advance according to each emitting diode's the luminous condition on the outer wall display panel of door, convenient and fast need not look for idle seat by one, practices thrift a large amount of valuable study time of classmates, also improves the availability factor of library seat simultaneously.
The above description is only exemplary of the present invention, and is not intended to limit the scope of the present invention. Any person skilled in the art should also realize that equivalent changes, modifications and combinations can be made without departing from the spirit of the present invention, and shall fall within the protection scope of the present invention.
Claims (1)
1. A library seat monitoring device, characterized by: comprises a trigger module, a display module and a circuit module, wherein the trigger module comprises a resistance strain gauge RLNegative temperature coefficient thermistor RNTCThe display module comprises a light emitting diode and a display panel, and the circuit module comprises a controllable resistor R1Constant value resistance R2Constant value resistance R3Wherein, the resistance strain gauge RLNegative temperature coefficient thermistor RNTCIs arranged in a groove of each seat surface, a pad and a controllable resistor R are arranged at the opening of the groove1Constant value resistance R2Constant value resistance R3The circuit is arranged on a wall and is formed by the trigger module, the display module and the circuit module, and the circuit connection relationship is as follows: two parallel branches are divided from the positive pole of the power supply in the circuit, and one branch is sequentially connected with a negative temperature coefficient thermistor R in seriesNTCResistance strain gauge RLConstant value resistance R2The other branch is sequentially connected with a controllable resistor R in series1Constant value resistance R3After the two branches are connected in parallel, the main circuit is connected in series with a switch, the switch is connected with the negative pole of the power supply, and the negative temperature coefficient thermistor RNTCResistance strain gauge RLA circuit and a controllable resistor R between1Constant value resistance R3The circuit at the position b is connected with the light emitting diode, the forward conduction direction of the light emitting diode is from a to b, the circuits of all seats are connected in parallel, the light emitting diode corresponding to each seat is arranged on a display board on the outer wall of the library door, and the position corresponding to the seat is marked below each light emitting diode on the display board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621242331.7U CN206348470U (en) | 2016-11-21 | 2016-11-21 | A kind of library seats supervising device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621242331.7U CN206348470U (en) | 2016-11-21 | 2016-11-21 | A kind of library seats supervising device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206348470U true CN206348470U (en) | 2017-07-21 |
Family
ID=59318209
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621242331.7U Withdrawn - After Issue CN206348470U (en) | 2016-11-21 | 2016-11-21 | A kind of library seats supervising device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206348470U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106646656A (en) * | 2016-11-21 | 2017-05-10 | 泰山学院 | Library seat monitoring apparatus and monitoring method thereof |
-
2016
- 2016-11-21 CN CN201621242331.7U patent/CN206348470U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106646656A (en) * | 2016-11-21 | 2017-05-10 | 泰山学院 | Library seat monitoring apparatus and monitoring method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201011346Y (en) | Programmable information displaying fan | |
| CN106646656B (en) | A kind of library seats monitoring device and its monitoring method | |
| CN206348470U (en) | A kind of library seats supervising device | |
| NO20085287L (en) | Electrical barrier | |
| CN205250800U (en) | Intelligent dining table | |
| CN202339615U (en) | Domestic small-sized coal gas alarm with exhausting function | |
| TW201025231A (en) | Adjustment and control device for display panel | |
| CN201269558Y (en) | Fire security alarming apparatus of kitchen gas range | |
| WO2017152373A1 (en) | New type of alcohol detection device based on internet of things | |
| CN106980293A (en) | A kind of surface is without button application method | |
| CN207731528U (en) | Device is demonstrated and is probed into multiple sensors application | |
| CN106710389A (en) | Home electric shock demonstration device | |
| CN103687147B (en) | Lamp control circuit and light fixture | |
| CN202711987U (en) | Switch with key ring | |
| CN201251838Y (en) | Combustible gas concentration display alarm | |
| CN203941645U (en) | A kind of experimental box of studying thermostatic control principle and application for student | |
| CN204358673U (en) | A kind of corridor intelligent-induction lamp | |
| CN103795392A (en) | Finger-touch cigarette lighter | |
| Parmar et al. | IoT Based Load Sensing Seats Controlling Lights and Fans | |
| CN204315146U (en) | Self-inductance power experiment instrument | |
| CN204029078U (en) | The simple and easy twinkle wall lamp controller of a kind of family expenses | |
| CN200954733Y (en) | Posture-correcting pen | |
| CN203828611U (en) | Convenient welcoming doormat device | |
| CN2932542Y (en) | LED display plugboard | |
| CN202329809U (en) | Light ray brightness tester for protecting eyesight |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170721 Effective date of abandoning: 20180529 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20170721 Effective date of abandoning: 20180529 |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |