CN201653441U

CN201653441U - Sensor

Info

Publication number: CN201653441U
Application number: CN2010201403666U
Authority: CN
Inventors: 梁国和; 吴增荣
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2010-03-16
Filing date: 2010-03-16
Publication date: 2010-11-24
Anticipated expiration: 2020-03-16

Abstract

The utility model discloses a sensor which comprises a sensor module, an MCU, an RFID antenna and a power supply management module, wherein the RFID antenna is used for sensing the magnetic energy transmitted by an RFID terminal and converting the sensed magnetic energy into electric energy; and the power supply management module connected with the RFID antenna is used for converting the electric energy converted by the RFID antenna into power supply voltage which is used for supplying power for the sensor module and the MCU. By adopting the technical scheme, the sensor solves the problem that the sensor continuously acquires data and processes so as to consume more electric energy.

Description

Sensor

Technical field

The utility model relates to technical field of measurement and test, particularly a kind of sensor.

Background technology

Sensor is a kind of pick-up unit, can detect measured information, and detected information can be converted into the information output of electric signal or other desired forms, according to certain rules to satisfy requirements such as transmission of Information, processing, storage, demonstration, record and control.Sensor is a primary link of realizing detection automatically and automatic control, mainly comprises photoelectric sensor, acoustic sensor, temperature sensor, humidity sensor, pressure transducer etc.

As shown in Figure 1, be sensor construction synoptic diagram in the prior art, mainly comprise power supply 11, sensor assembly 12 and micro-control unit (MCU, Micro Control Unit) 13, wherein power supply 11 is used to sensor assembly 12 and MCU13 power supply, sensor assembly 12 is at parameter acquisition data to be measured, and the data that collect are sent to MCU13, MCU13 carries out respective handling with the data that receive, be converted to the data of default form, sensor can be real-time will handle after data export, also the data after handling can be deposited into memory module earlier, regularly the data in the memory module are exported then, perhaps after receiving the extraneous reading of data order that sends, the data of storing in the memory module are exported, wherein sensor can but be not limited to by USB (universal serial bus) (USB, Universal Serial Bus) port or secure data I/O (SDIO, Secure Digital Input/Output) port etc. carries out wired output, also can carry out wireless output by the mode of wireless communication module.

In the prior art, in a single day sensor enters duty, the line data of will continual image data going forward side by side is handled, power supply in the sensor is powered for sensor assembly always at this moment, but under some situation, sensor does not need continual image data, only need carry out data acquisition constantly to get final product at some, so the continual image data of sensor and handle and just consumed more electric energy.

The utility model content

The utility model embodiment provides a kind of sensor, in order to solve the continual image data of sensor that exists in the prior art and to handle the problem that has consumed more electric energy.

The utility model embodiment technical scheme is as follows:

A kind of sensor comprises sensor assembly and micro-control unit MCU, also comprises: the radio frequency discrimination RFID antenna is used for the magnetic energy that induced RF ID terminal is launched, and the magnetic energy of sensing is converted into electric energy; With the power management module that the RFID antenna links to each other, be used for the electric energy that described RFID antenna transforms is converted to supply voltage, be described sensor assembly and MCU power supply.

In the utility model embodiment technical scheme, be provided with the RFID antenna in the sensor, after the RFID terminal enters in the induction range of RFID antenna, the RFID antenna sends to power management module after the magnetic energy of sensing can being converted into electric energy, power management module is converted to supply voltage with the electric energy that receives, be sensor assembly in this sensor and MCU power supply, after the power management module power supply, sensor assembly carries out data acquisition, MCU carries out respective handling with the data that collect, therefore when needs sensor acquisition data, just with close this sensor of RFID terminal, making the RFID antenna that magnetic energy is converted to electric energy, is sensor assembly and MCU power supply in the sensor after being changed by power management module, and being the sensor power supply without power supply always, this has just saved the power consumption of sensor effectively.

Description of drawings

Fig. 1 is in the prior art, the sensor construction synoptic diagram;

Fig. 2 is among the utility model embodiment, the sensor construction synoptic diagram;

Fig. 3 is among the utility model embodiment, the power management module circuit diagram;

Fig. 4 is among the utility model embodiment, the sensor construction synoptic diagram;

Fig. 5 is among the utility model embodiment, and RFID terminal and sensor carry out the information interacting method process flow diagram.

Embodiment

At length set forth to the main realization principle of the utility model embodiment technical scheme, embodiment and to the beneficial effect that should be able to reach below in conjunction with each accompanying drawing.

As shown in Figure 2, be the sensor construction synoptic diagram among the utility model embodiment, comprise sensor assembly 21 and MCU22, sensor assembly 21 is used for after sensor powers on, carry out data acquisition at parameter to be measured, and the data that collect are sent to MCU22, MCU22 links to each other with sensor assembly 21, be used for after sensor powers on, according to default processing rule, the data that sensor assembly 21 collects are carried out respective handling, sensor among the utility model embodiment also comprises radio-frequency (RF) identification (RFID, RadioFrequency Identification) antenna 23 and power management module 24, power management module 24 and RFID antenna 23, MCU22 links to each other with sensor assembly 21, wherein:

RFID antenna 23, the magnetic energy that is used for the emission of induced RF ID terminal, and send power management module 24 to after the magnetic energy of sensing is converted into electric energy, after the RFID terminal entered in the induction range of this RFID antenna 23, RFID antenna 23 will be sensed the magnetic energy of RFID terminal emission;

Power management module 24 is used for the electric energy that RFID antenna 23 transmits is converted to supply voltage, is this sensor power supply, just is sensor assembly 21 and MCU22 power supply.

Wherein the RFID terminal is the portable terminal with RFID function, after the RFID terminal enters in the induction range of RFID antenna, the magnetic energy that RFID antenna induction RFID terminal is sent, and the magnetic energy of sensing is converted to electric energy, the power management module that links to each other with the RFID antenna is handled the electric energy of RFID conversion, be treated to supply voltage, be sensor assembly and MCU power supply then, this moment, sensor was in power-up state, sensor assembly in the sensor and MCU just can operate as normal so, that is to say that sensor assembly carries out data acquisition, MCU carries out data processing, thereby has realized by RFID terminal and RFID antenna being the purpose of sensor power supply.

If RFID leaves the induction range of RFID antenna, sensor just is in off-position so, power management module can not be sensor assembly and MCU power supply, sensor assembly and MCU can not carry out operate as normal, therefore can when the needs working sensor, make the RFID terminal near the RFID antenna, when not needing working sensor, make RFID away from the RFID antenna, realized the purpose of power supply as required.

As shown in Figure 3, the power management module that the utility model embodiment proposes can further include resonant circuit, rectification circuit and filtering circuit, and the RFID antenna is inductive coil L, wherein:

The two ends of resonant circuit link to each other respectively with the two ends of RFID antenna, are used to receive the alternating voltage of RFID antenna transmission, and this resonant circuit comprises capacitor C 1 and C2, are used to regulate the receivable rf frequency of RFID antenna;

Rectification circuit links to each other with filtering circuit with resonant circuit respectively, comprises diode D1, D2, D3 and D4, is used for the alternating voltage that resonant circuit receives is integrated into DC voltage;

Filtering circuit comprises capacitor C 3, pull-up resistor R1 and R2, is used for the DC voltage after integrating is converted to supply voltage, and is output as the sensor power supply.

Wherein above-mentioned RFID terminal can but be not limited to send the radiofrequency signal of 125KHz or 13.56MHz.

Among the utility model embodiment, MCU is after handling the data that collect, can be by wired mode or wireless mode, data after handling are exported to outside equipment, can also be now with the data storage after handling in the memory module of sensor, in the regulation moment or after receiving the extraneous reading of data order that sends, the data of storing in the memory module are exported.

More preferably, the utility model embodiment proposes to be provided with the RFID label in sensor, this RFID label and MCU, the RFID antenna links to each other with power management module, power management module is powered for this RFID label, data after MCU will handle are written in this RFID label, the RFID label is after being powered by power management module, the data that MCU is written in the RFID label send the RFID terminal to by the RFID antenna, the RFID terminal can be according to relevant application software, the data that read are analyzed, and analysis result offered the user, analysis result can also be sent to the data center of far-end, wherein can repeat repeatedly information interaction between RFID terminal and the RFID label.

Wherein, the RFID label can also carry out authentication to the RFID terminal before sending the data to the RFID terminal, and this moment, the RFID label further comprised storage unit, authenticating unit and transmitting element, wherein:

Storage unit is used for the data that store M CU writes;

Authenticating unit is used for the RFID terminal is carried out authentication;

Transmitting element is used for giving described RFID terminal with the data that are stored in the storage unit by the RFID antenna transmission after authenticating unit is passed through for authentication the result of RFID terminal authentication.

Because MCU is written in the RFID label, sends the data to the RFID terminal by the RFID label, and pass through RFID antenna transmission data between RFID label and the RFID terminal, therefore do not need sensor that extra output port or output module are set.

If sensor construction as shown in Figure 4, comprise RFID antenna 41, power management module 42, RFID label 43, MCU44 and sensor assembly 45, carry out the information interactive method schematic flow sheet as shown in Figure 5 between sensor shown in Figure 4 and the RFID terminal, wherein its concrete processing procedure is as follows:

Step 51, RFID terminal enter in the induction range of the RFID antenna in the sensor;

Step 52, the RFID antenna receives the magnetic energy of RFID terminal emission;

Step 53, the RFID antenna is converted into electric energy with the magnetic energy that receives;

Step 54, the RFID antenna sends the magnetic energy that transforms to power management module;

Step 55, power management module is treated to supply voltage with the electric energy that receives;

Step 56, power management module are that RFID label, MCU, sensor assembly are powered;

Step 57, sensor assembly carries out data acquisition;

Step 58, sensor assembly sends to MCU with the data that collect;

Step 59, MCU carries out respective handling according to default processing rule with the data that receive, and is converted to the required form of output;

Step 510, the data after MCU will handle are written in the RFID label;

Step 511, the RFID label sends to the RFID terminal by the RFID antenna with the data that write.

Therefore, in the utility model embodiment technical scheme, be provided with the RFID antenna in the sensor, after the RFID terminal enters in the induction range of RFID antenna, the RFID antenna sends to power management module after the magnetic energy of sensing can being converted into electric energy, power management module is converted to supply voltage with the electric energy that receives, be sensor assembly in this sensor and MCU power supply, after the power management module power supply, sensor assembly carries out data acquisition, MCU carries out respective handling with the data that collect, therefore when needs sensor acquisition data, just with close this sensor of RFID terminal, make the RFID antenna that magnetic energy is converted to electric energy, be sensor assembly and the MCU power supply in the sensor after being changed by power management module, and be the sensor power supply without power supply always, this has just saved the power consumption of sensor effectively.

In addition because sensor do not need the continual data acquisition of carrying out, but the RFID terminal near the time just carry out data acquisition, thereby improved the work efficiency of sensor effectively.

Obviously, those skilled in the art can carry out various changes and modification to the utility model and not break away from spirit and scope of the present utility model.Like this, if of the present utility model these are revised and modification belongs within the scope of the utility model claim and equivalent technologies thereof, then the utility model also is intended to comprise these changes and modification interior.

Claims

1. a sensor comprises sensor assembly and micro-control unit MCU, it is characterized in that, also comprises:

The radio frequency discrimination RFID antenna is used for the magnetic energy that induced RF ID terminal is launched, and the magnetic energy of sensing is converted into electric energy;

With the power management module that the RFID antenna links to each other, be used for the electric energy that described RFID antenna transforms is converted to supply voltage, be described sensor assembly and MCU power supply.

2. sensor as claimed in claim 1 is characterized in that, also comprises the RFID label, and described power management module also is that RFID is tag-powered;

Described sensor assembly is used for carrying out data acquisition at parameter to be measured after being powered by power management module;

Described MCU is used for the data that sensor assembly collects being carried out being written in the described RFID label after the respective handling after being powered by power management module;

The RFID label is used for after being powered by power management module, and the data that described MCU is written in the described RFID label send described RFID terminal to by the RFID antenna.

3. sensor as claimed in claim 2 is characterized in that, the RFID label comprises:

Storage unit stores the data that described MCU writes;

Authenticating unit is used for described RFID terminal is carried out authentication;

Transmitting element is used for giving described RFID terminal with the data that are stored in the storage unit by the RFID antenna transmission after authenticating unit is passed through for authentication the result of described RFID terminal authentication.

4. sensor as claimed in claim 1 is characterized in that, described power management module comprises:

Resonant circuit links to each other with described RFID antenna, is used to receive the alternating voltage of described RFID antenna transmission;

Rectification circuit is used for the alternating voltage that resonant circuit receives is integrated into DC voltage;

Filtering circuit is used for the DC voltage after the rectification circuit integration is converted to supply voltage, is described sensor assembly and MCU power supply.