CN204423302U

CN204423302U - Electronic signature equipment

Info

Publication number: CN204423302U
Application number: CN201520105059.7U
Authority: CN
Inventors: 罗青
Original assignee: Hangzhou Le Ding Science And Technology Ltd
Current assignee: Hangzhou Le Ding Science And Technology Ltd
Priority date: 2015-02-13
Filing date: 2015-02-13
Publication date: 2015-06-24
Anticipated expiration: 2025-02-13

Abstract

The utility model discloses a kind of electronic signature equipment, solve and no matter whether use, write terminal to be unlocked all the time, the problem in the serviceable life of writing terminal is also reduced while waste electric energy, its drip irrigation device comprises writing terminal, write terminal and be provided with pyroelectric infrared sensor, pyroelectric infrared sensor is coupled with control circuit to control to write the open and close of terminal, write when to have biological thermal source near terminal, pyroelectric infrared sensor sends a signal to control circuit, control is write terminal and is opened, write when there is no biological thermal source near terminal, pyroelectric infrared sensor sends a signal to control circuit, control is write terminal and is closed, electronic signature equipment of the present utility model, by pyroelectric infrared sensor to be confirmed whether that people is before writing terminal, if someone, control to write terminal by control circuit and open, if nobody, close, can effective saves energy, improve the serviceable life of writing terminal.

Description

Electronic signature equipment

Technical field

The utility model relates to a kind of signature device, and more particularly, it relates to a kind of electronic signature equipment.

Background technology

Along with the development of modern electronic technology, occur that the electronic writing board such as electronic whiteboard, electronic blackboard is to replace blackboard, existing electronic writing board scheme mainly utilizes electromagnetic induction between lettering pen and clipboard or pressure sensing, camera is used to catch the person's handwriting etc. writing people, teacher, owing to being subject to the restriction of distance of reaction, image pickup scope, being still strapped in distance clipboard and more closely can carrying out on clipboard in the scope of writing by this kind of scheme.Meanwhile, the electronic writing board of induction is used to involve great expense.

In order to overcome above-mentioned shortcoming, display packing, the system of a kind of electronic writing on blackboard information disclosed in application number 201210527780.6 and write terminal, the method comprises: utilize and write the acceleration transducer be coupled in terminal, with predetermined sampling interval, measure the acceleration sampled value of hand-written terminal motion in sampling instant; According to sampling instant, and acceleration sampled value, calculate the track data writing terminal; Track data is converted to the form that show presentation equipment can identify, the track data after display format transformation.By method provided by the present invention, system and write terminal, write terminal to utilize and write terminal and aloft write, and output display, the constraint of writer is departed from entity blackboard or electronic writing board, maintains again the use habit with original chalk writing simultaneously.

After use terminates, write terminal generally can not directly to be closed, but be unlocked all the time to treat other people to use, and it is in running order all the time to write terminal in the process waited for, not only waste electric energy, and make to write terminal and reduce its serviceable life, so current used electronic signature equipment has certain room for improvement.

Utility model content

For the deficiency that prior art exists, the purpose of this utility model is to provide a kind of energy-conservation electronic signature equipment.

For achieving the above object, the utility model provides following technical scheme: a kind of electronic signature equipment, comprise and write terminal, described terminal of writing is provided with pyroelectric infrared sensor, described pyroelectric infrared sensor is coupled with control circuit to control to write the open and close of terminal, describedly write when to have biological thermal source near terminal, described pyroelectric infrared sensor sends a signal to control circuit, write terminal described in control to open, describedly write when there is no biological thermal source near terminal, described pyroelectric infrared sensor sends a signal to control circuit, write terminal described in control to close.

Preferably, described control circuit comprises field effect transistor and relay;

The grid of described field effect transistor is coupled to pyroelectric infrared sensor with reception control signal;

The drain electrode of described field effect transistor is coupled to power supply;

The source class of described field effect transistor is coupled to ground connection after relay;

The normally opened contact of described relay connects power supply to control to write the open and close of terminal after being coupled to and writing terminal.

Preferably, described control circuit also comprises power-off delay relay;

The coil of described power-off delay relay is coupled between the normally closed contact of relay and ground holds;

The two ends of the normally opened contact of described power-off delay relay are respectively coupled to the both sides of writing terminal and power supply, can time-delay closing to control writing terminal.

Preferably, described pyroelectric infrared sensor comprises housing, optical filter, field effect transistor and pyroelectricity element;

Described housing is provided with through hole, and described optical filter is connected in described through hole;

Described field effect transistor and pyroelectricity element are positioned at the enclosure interior of described pyroelectric infrared sensor;

Described pyroelectricity element is coupled between the grid of described field effect transistor and ground end.

Preferably, described fet gate is held with ground and is provided with biasing resistor.

Preferably, described field effect transistor drain electrode is held with ground and is provided with EMI electric capacity.

Preferably, the coil of described relay is parallel with fly-wheel diode.

The utility model hinge structure is compared to be had: by pyroelectric infrared sensor to be confirmed whether that people is before writing terminal, if someone, control to write terminal by control circuit and open, if nobody, close, can effective saves energy, improve the serviceable life of writing terminal.

Accompanying drawing explanation

Fig. 1 is the structural representation writing terminal of the present utility model;

Fig. 2 is control circuit of the present utility model.

In figure: 1, write terminal; 2, pyroelectric infrared sensor; 3, control circuit.

Embodiment

Shown in Fig. 2, embodiment is described further.

A kind of electronic signature equipment disclosed in the utility model, comprise and write terminal 1, write terminal 1 and be provided with pyroelectric infrared sensor 2, pyroelectric infrared sensor 2 comprises housing, optical filter, field effect transistor Q1 and pyroelectricity element, housing is provided with through hole, optical filter is connected in through hole, and field effect transistor Q1 and pyroelectricity element are positioned at the enclosure interior of pyroelectric infrared sensor 2, and by the radiation of optical filter induction external heat.The Main Function of optical filter only allows wavelength to pass through at the infrared ray (Infrared wavelength that human body sends) of about 10 μm, and light, sunshine and other radiation are filtered, to suppress extraneous interference.Infrared induction source is made up of the pyroelectricity element of two series connection or parallel connection usually, the electrode of these two pyroelectricity elements is contrary, ambient background radiation almost has identical effect to two pyroelectricity elements, and the pyroelectric effect making it produce is cancelled out each other, and output signal is close to zero.Once have in people's intrusion detection region, human infrared radiation by part mirror focusing, and is received by pyroelectricity element, because angle is different, the heat that two panels pyroelectricity element receives is different, and pyroelectricity energy is also different, can not offset completely, after treated processing of circuit, export control signal.Pyroelectric effect is similar with piezoelectric effect, refers to the phenomenon causing plane of crystal electric charge due to the change of temperature.Pyroelectric infrared sensor 2 is made up of ceramic oxide or piezolectric crystal unit, electrode is made on element two surfaces, when within the scope of Sensor monitoring, temperature has a change of △ T, pyroelectric effect can produce electric charge △ Q on two electrodes, namely produces a faint voltage △ V between electrodes.Because its output impedance is high, a field effect transistor Q1 is had to carry out impedance transformation in the sensor.The electric charge △ Q that pyroelectric effect produces can combine by the ion in air and disappear, namely when ambient temperature-stable is constant, △ T=O, sensor no-output.Human body or the larger animal of volume have constant body temperature, general at 37 degree, so the infrared ray of specific wavelength about 10 μm can be sent, when human body enters detection zone, because human body temperature and environment temperature have difference, the infrared ray of about 10 μm of human-body emitting is by gathering on infrared induction source (pyroelectricity element) after the enhancing of Fresnel lens optical filter, infrared induction source will lose charge balance when receiving human infrared radiation, outside release electric charge, and then produce △ T and by △ T to the periphery circuit export, just alerting signal can be produced after subsequent conditioning circuit processes after testing.

Pyroelectric infrared sensor 2 is coupled with control circuit 3 to control to write the open and close of terminal 1, control circuit 3 comprises field effect transistor Q1 and relay K M, field effect transistor Q1 is preferably the metal-oxide-semiconductor of N channel-type, the grid of field effect transistor Q1 is coupled to pyroelectricity element with reception control signal, the grid of field effect transistor Q1 and ground are provided with biasing resistor R1 between holding, be current signal because electrocaloric effect creates signal, so hold by the grid of scene effect pipe Q1 and ground, individual resistance is set, current signal can be converted into voltage signal, and the threshold values by regulating the resistance of biasing resistor R1 to regulate its conducting, namely regulate the sensitivity of pyroelectric infrared sensor 2, structure is simple, be easy to realize, the drain electrode of field effect transistor Q1 is coupled to power supply, the source class of field effect transistor Q1 and ground are provided with EMI electric capacity C1 between holding, the magnitude of voltage that drain electrode can be made to export on the one hand is close to constant, and it exports the impact not being subject to magnetic interference, the source class of field effect transistor Q1 is also coupled to ground connection after the coil of relay K M, the normally opened contact of relay K M connects power supply to write the open and close of terminal 1 after being coupled to and writing terminal 1, the coil of relay K M is parallel with sustained diode 1, electricity when power-off in coil can be consumed by sustained diode 1, when write to have biological thermal source near terminal 1 time, pyroelectric infrared sensor 2 sends a signal to control circuit 3, the grid of field effect transistor Q1 is made to receive a high level, to make field effect transistor Q1 conducting, thus make the coil conducting of relay K M, the electric shock of often opening of relay K M is closed, and then control to write terminal 1 and open, when write there is no biological thermal source near terminal 1 time, pyroelectric infrared sensor 2 sends a signal to control circuit 3, the grid of field effect transistor Q1 is made to receive a low level, turn off to make field effect transistor Q1, thus make the coil conducting of relay K M, the electric shock of often opening of relay K M is opened, control is write terminal 1 and is closed.

Control circuit 3 also comprises power-off delay relay KT, the coil of power-off delay relay KT is coupled between the normally closed contact of relay K M and ground holds, the two ends of the normally opened contact of power-off delay relay KT are respectively coupled to the both sides of writing terminal 1 and power supply, namely the two ends of the normally opened contact of relay K M are parallel to, can time-delay closing to control writing terminal 1, power-off delay relay KT model is preferably H3BA-8, power-off delay relay KM working method is, power-off delay relay KM energising back contact state switches immediately, when reaching setting-up time, contacts status just recovers, when do not use write terminal 1 time away from keyboard for some reason after, the hot-wire coil of relay K M disconnects, make often to open electric shock to be opened by closed switching to, normally closed electric shock by open switch to closed, and then control the coil conducting of power-off delay relay KT, automatically disconnect again after making to write the time set by terminal 1 time delay, write terminal 1 and can remain on duty to wait for that user returns, until delay time terminates and then turns off to write terminal 1 to realize energy-conservation effect.

The above is only preferred implementation of the present utility model, protection domain of the present utility model be not only confined to above-described embodiment, and all technical schemes belonged under the utility model thinking all belong to protection domain of the present utility model.It should be pointed out that for those skilled in the art, do not departing from the some improvements and modifications under the utility model principle prerequisite, these improvements and modifications also should be considered as protection domain of the present utility model.

Claims

1. an electronic signature equipment, comprise and write terminal, it is characterized in that: described in write terminal and be provided with pyroelectric infrared sensor, described pyroelectric infrared sensor is coupled with control circuit to control to write the open and close of terminal, describedly write when to have biological thermal source near terminal, described pyroelectric infrared sensor sends a signal to control circuit, write terminal described in control to open, describedly write when there is no biological thermal source near terminal, described pyroelectric infrared sensor sends a signal to control circuit, writes terminal and close described in control.

2. electronic signature equipment according to claim 1, is characterized in that: described control circuit comprises field effect transistor and relay;

3. electronic signature equipment according to claim 2, is characterized in that: described control circuit also comprises power-off delay relay;

4. the electronic signature equipment according to claim 1 or 3, is characterized in that: described pyroelectric infrared sensor comprises housing, optical filter, field effect transistor and pyroelectricity element;

5. the electronic signature equipment according to Claims 2 or 3, is characterized in that: described fet gate is held with ground and is provided with biasing resistor.

6. the electronic signature equipment according to Claims 2 or 3, is characterized in that: described field effect transistor drain electrode is held with ground and is provided with EMI electric capacity.

7. the electronic signature equipment according to Claims 2 or 3, is characterized in that: the coil of described relay is parallel with fly-wheel diode.