CN2884340Y

CN2884340Y - Low temp. preservation moisture recording device based on electronic label

Info

Publication number: CN2884340Y
Application number: CN 200620025453
Authority: CN
Inventors: 王以忠; 南忠良; 谢丁龙; 张锐; 卢修竹
Original assignee: Tianjin University of Science and Technology
Current assignee: Tianjin University of Science and Technology
Priority date: 2006-03-03
Filing date: 2006-03-03
Publication date: 2007-03-28
Anticipated expiration: 2016-03-03

Abstract

The utility model discloses a recording apparatus for preservation humidity in low temperature based on the electric label, aiming at to provide a recording apparatus for preservation humidity in low temperature with features as adaptability, simple structure, and flexible, low costs. The humidity sensor is connected with micro controller through A/D converter, real time clock generator is connected with micro controller through double wires serial bus interface, the micro controller is connected with electric label reading and writing head through synchronized serial interface, wireless communication is made between the electric label reading and writing head and the electric label; the micro controller is to read the data of time, date and humidity, and write the data of time, date and humidity into the electric label through the electric label reading and writing head; the real time clock generator and the micro controller are connected with power respectively. As the prior electric label reading and writing head and electric label can be used to make flexible structure and easy to set as well as good applicability, which also has features as simple structure and low costs.

Description

Preservation by low temperature humidity pen recorder based on electronic tag

Technical field

The utility model relates to a kind of humidity pen recorder, in particular, relates to a kind of humidity pen recorder that uses the electronic tag record data.

Background technology

Preservation by low temperature is long, a kind of preferably method of effect of freshness date in the present food fresh keeping mode.In the transportation and storage process of food, in order to reach fresh-keeping purpose, need to use various devices that the humidity of food environment of living in is kept within the specific limits, therefore, in transportation and storing process, just need the residing ambient humidity of record FF.

Electronic tag (RFID) technology is a kind of technology of comparative maturity, its feature is a kind of non-contacting automatic identification technology, its principle is to utilize radiowave to transmit identifying information, has been widely used in various fields such as industrial automation, business automation, communications and transportation control and management.

At present, preservation by low temperature humidity pen recorder is made up of humidity sensor, A/D converter, microcontroller and display, and it can preserve the humidity delta data of a period of time, the humidity situation of change of arbitrary time before managerial personnel can check by display.But this kind device does not also combine with electronic tag (RFID) technology, and the humidity that is write down can only self show, can not swap data, seriously define the field of its application.

The utility model content

The utility model is in order to provide a kind of adaptability strong, and is simple in structure, flexible, the preservation by low temperature humidity pen recorder based on electronic tag that cost is low.

The utility model is achieved through the following technical solutions:

A kind of preservation by low temperature humidity pen recorder based on electronic tag, comprise humidity sensor, A/D converter and microcontroller, it is characterized in that, also comprise electronic label read-write head and electronic tag, described humidity sensor is connected with microcontroller by A/D converter, the real-time clock generator is connected with microcontroller by the two-wire serial bus interface, and microcontroller is connected with the electronic label read-write head by synchronous serial interface, carries out radio communication between electronic label read-write head and the electronic tag; Described microcontroller is used for readout time, date data and humidity data, and by the electronic label read-write head time, date data and humidity data is write electronic tag; Described real-time clock generator is connected with power supply respectively with microcontroller.

Described real-time clock generator is connected with standby power supply.

The utlity model has following technique effect:

Owing to can use existing electronic label read-write head and electronic tag, structure is flexible, is easy to configuration, and applicability is strong, no matter is small-scale tentative introducing, and still large-scale system introduces and all can realize.And simple in structure, cost is low, can be widely used in the logistics field.

Description of drawings

Fig. 1 is the circuit diagram based on the preservation by low temperature humidity pen recorder of electronic tag.

Embodiment

Below in conjunction with the drawings and specific embodiments the utility model is described in detail.

The circuit diagram of the preservation by low temperature humidity pen recorder based on electronic tag of the present utility model as shown in Figure 1, comprise humidity sensor, A/D converter, microcontroller, electronic label read-write head (being the RFID read/write head) and electronic tag, humidity sensor is connected with microcontroller by A/D converter, real-time clock generator RTC is connected with microcontroller by two-wire serial bus interface I2C, microcontroller is connected with the electronic label read-write head by synchronous serial interface SPI, carries out radio communication between electronic label read-write head and the radio frequency identification RFID.Microcontroller is used for readout time, date data and humidity data, and by the electronic label read-write head time, date data and humidity data is write electronic tag.The real-time clock generator is connected with power supply respectively with microcontroller.

In actual use, can use the microcontroller that microcontroller and A/D converter, two-wire serial bus interface, synchronous serial interface are become one, as ATMEGA16 etc.

Humidity sensor adopts HSU-07A, and major function is to detect local humidity data such as the packing case of storage FF, storeroom, sends in the microcontroller.

The real-time clock generator adopts DS1337, the data that humidity sensor is gathered and sent need the collection date and time of additional moisture simultaneously, DS1337 adopts the data of two-way two buses to transmit working method, be that chip is under the control of serial clock, receive command word or the address date that sends from microcontroller by the serial data termination, also can give microcontroller by data such as serial data end date of shipping, time, interrupt request singals.

Primary power is chargeable secondary cell, for whole preservation by low temperature humidity register system power supply, comprising the power supply of RTC.Real-time clock generator RTC also is connected with standby power supply, and when primary power did not have electricity, standby power supply began the power supply for RTC, to prevent losing of time data.

Two-wire serial bus interface I ²C can with the RTC swap data, receive the time data among the RTC, be attached on the humidity data.

The RFID read/write head is ZLG500, and major function is to read the record position of humidity data in the RFID label by radio communication, receives write command and the humidity data that the AVR microcontroller sends by the UART interface, and humidity data is write in the RFID label.

The RFID label adopts passive label, as PHILIPS MF1 IC S50, by data designated form storage humidity data.

The microcontroller response from real-time clock generator data readout time, is read humidity data from the interrupt request of real-time clock generator from humidity sensor.When microcontroller is communicated by letter with the electronic label read-write head, at first connect, after the success, obtain writing in the electronic tag address of data again by synchronous serial interface, then the data that write are sent to the electronic label read-write head, enter low power consumpting state at last.

Although relate to a kind of preservation by low temperature humidity pen recorder and carried out special description disclosed based on electronic tag with reference to embodiment, embodiment described above is illustrative and not restrictive, under the situation that does not break away from spirit and scope of the present utility model, all variations and modification are all within scope of the present utility model.

Claims

1, a kind of preservation by low temperature humidity pen recorder based on electronic tag, comprise humidity sensor, A/D converter and microcontroller, it is characterized in that, also comprise electronic label read-write head and electronic tag, described humidity sensor is connected with microcontroller by A/D converter, the real-time clock generator is connected with microcontroller by the two-wire serial bus interface, and microcontroller is connected with the electronic label read-write head by synchronous serial interface, carries out radio communication between electronic label read-write head and the electronic tag; Described microcontroller is used for readout time, date data and humidity data, and by the electronic label read-write head time, date data and humidity data is write electronic tag; Described real-time clock generator is connected with power supply respectively with microcontroller.

2, the preservation by low temperature humidity pen recorder based on electronic tag according to claim 1 is characterized in that described real-time clock generator is connected with standby power supply.