CN213274602U - Passive NFC temperature sensor - Google Patents
Passive NFC temperature sensor Download PDFInfo
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- CN213274602U CN213274602U CN202022599034.0U CN202022599034U CN213274602U CN 213274602 U CN213274602 U CN 213274602U CN 202022599034 U CN202022599034 U CN 202022599034U CN 213274602 U CN213274602 U CN 213274602U
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Abstract
The utility model discloses a passive NFC temperature sensor, including temperature sensitive unit, analog-to-digital converter, signal processing unit and NFC transponder, wherein, temperature sensitive unit acquires the temperature data signal of the object that awaits measuring, analog-to-digital converter receives temperature data signal to carry out digital conversion to temperature data signal, signal processing unit receives and saves digital temperature data signal, and with digital temperature data signal send for the NFC transponder, the digital temperature data signal of NFC transponder output, just, digital temperature data signal can be read by the NFC reader, the utility model discloses a passive NFC temperature sensor non-contact's measured temperature, convenient to use, temperature measurement operation is simple and easy.
Description
Technical Field
The utility model relates to a temperature measurement technical field especially relates to a passive NFC temperature sensor.
Background
Conventional temperature measuring means are mainly mercury thermometers and digital thermometers. The mercury thermometer is one of expansion thermometers, and the thermometer consists of a glass bulb containing mercury, a capillary tube, scales, a temperature scale and the like. Its advantages are low cost, limited operation due to fragility of glass tube and toxicity of mercury, and low measurement precision, speed and convenience. Another commonly used temperature measuring device in life is a digital thermometer. Its advantage is that can be comparatively accurate judgement and measurement temperature to show with the mode of digit, the reading is directly perceived, but its cost is higher, and the portability is relatively poor. More importantly, the two temperature measuring devices have a common disadvantage in that they are portable and easy to operate because they are integrated devices that measure and read data. When trying to measure in a box closed environment, because it is as an organic whole with reading data to measure, temperature measuring device measures the temperature after, need open the box earlier, then takes out temperature measuring device and just can read the temperature data that measures, and the temperature measurement operation is inconvenient, moreover, takes out temperature measuring device and causes measuring error very easily.
On the other hand, the early RFID technology has been successfully applied to various fields, and brings another short-range high-frequency wireless communication technology, nfc (near Field communication). The technology allows non-contact point-to-point data transmission (within ten centimeters) to exchange data among electronic equipment, and has the characteristics of low cost, convenience, easiness in use, richer intuition and the like. At present, the mobile phone, the super notebook and other handheld devices provide an NFC communication mode, so that measurement and reading can be independently carried out.
Nowadays, the living standard is increasingly improved, and the living rhythm is faster and faster, the NFC handheld device becomes one of necessities of people; besides basic functions of basic call, information and the like, the NFC handheld device is also developed into a tool with multiple auxiliary functions, which can be used as mp3, an electronic book, a camera, an alarm clock and the like, and thus provides great convenience for life of people. Applications based on NFC terminals have also emerged in recent years, including electronic purses, smart media, and so on.
The existing temperature sensor is usually active wired measurement, the source can be limited by standby time, the electric quantity is required to be replaced in time when being exhausted, the replacement operation can cause measurement errors and mutual measurement errors between two sensors, in addition, the wired temperature measurement can be limited by wiring, and the wired temperature sensor cannot be used in occasions with narrow space, incapability of wiring or difficult wiring, and severe environment occasions such as humidity, corrosivity and the like, the application range is narrow, the temperature measurement precision is low, the calibration and the maintenance are required, and the use is extremely inconvenient.
In view of the above, it is reasonable to provide a passive NFC temperature sensor.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a convenient to use, simple and easy, the passive NFC temperature sensor of non-contact of temperature measurement operation.
In order to realize the above object, the technical scheme of the utility model provides a passive NFC temperature sensor is provided, include:
the temperature sensing unit acquires a temperature data signal;
the analog-to-digital converter receives the temperature data signal and carries out digital conversion on the temperature data signal;
an NFC transponder;
the signal processing unit receives and stores the digitized temperature data signal and sends the digitized temperature data signal to the NFC transponder;
the NFC transponder outputs a digitized temperature data signal, and the digitized temperature data signal can be read by an NFC reader.
As one preferable scheme, the temperature sensitive unit is a temperature sensitive chip.
Preferably, the analog-to-digital converter is a sixteen-bit analog-to-digital converter.
As one preferred scheme, the signal processing unit is a microprocessor or a singlechip.
As one preferable scheme, the NFC transponder is a dynamic dual-interface NFC transponder.
As one preferable scheme, the NFC protocol is an ISO144443-A/B protocol.
As one preferable scheme, the passive NFC temperature sensor is a passive NFC tag.
As one of the preferred solutions, the passive NFC temperature sensor is powered by capturing an NFC radio frequency field.
As one of the preferred solutions, the passive NFC temperature sensor may operate within a radio frequency field of the NFC reader.
In conclusion, the application the utility model discloses passive NFC temperature sensor's technical scheme has following beneficial effect at least: the utility model discloses a passive NFC temperature sensor passes through temperature sensitive unit and is close to the object that awaits measuring, in order to acquire the temperature data signal of the object that awaits measuring, and send it for analog-to-digital converter (ADC), analog-to-digital converter carries out digital conversion back to temperature data signal, send it for signal processing unit, signal processing unit receives and stores digital temperature data signal, and send digital temperature data signal for the NFC transponder, the digital temperature data signal of NFC transponder output, and, digital temperature data signal can be read by NFC reader, the digital temperature data signal of NFC temperature sensor output, the temperature information of the object that awaits measuring can be known to the temperature data that NFC reader shows through looking over, high durability and convenient use, the temperature measurement operation is simple and easy.
In addition, the passive NFC temperature sensor of the utility model is passive wireless measurement, passive means no standby time limitation, which avoids the measurement error caused by the replacement operation of the temperature sensor and the measurement error between two sensors, wireless means no need to consider the limitation of wiring, and small in size, can be used in the occasions with narrow space, no wiring or difficult wiring, can be completely integrated into the measured environment and avoid the interference to the environment when the sensors are laid, can be packaged for the second time, so as to be suitable for the severe environments such as humidity, corrosivity and the like, moreover, the passive NFC temperature sensor can be made into flexible, can be attached to the surface of the measured object for measurement, so as to be suitable for the irregular surface, is flexible to use and wide in range, and is passive without replacement, low in cost and free from maintenance, high in precision and high stability, the temperature measurement resolution can reach 0.01, and does not need calibration, the use is very convenient.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a block diagram of a passive NFC temperature sensor according to the present invention.
Description of reference numerals: 1. a temperature sensor; 10. a temperature sensitive unit; 20. an analog-to-digital converter; 30. a signal processing unit; 40. an NFC transponder; 50. an NFC reader.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative work belong to the protection scope of the present invention based on the embodiments of the present invention.
Referring to fig. 1, the present embodiment provides a passive NFC temperature sensor 1, which includes a temperature-sensitive unit 10, an analog-to-digital converter 20, a signal processing unit 30, and an NFC transponder 40, wherein the temperature-sensitive unit 10 employs a high-precision analog temperature-sensitive chip, the analog-to-digital converter 20 employs a sixteen-bit analog-to-digital converter 20 (ADC), the temperature-sensitive chip interfaces with the sixteen-bit analog-to-digital converter 20, the temperature-sensitive chip obtains a temperature data signal of an object to be measured in a non-contact manner in a close range, the analog-to-digital converter 20 receives the temperature data signal and performs digital conversion on the temperature data signal, the signal processing unit 30 receives and stores the digitized temperature data signal and transmits the digitized temperature data signal to the NFC transponder 40, the NFC transponder 40 outputs the digitized temperature data signal, and the NFC transponder 40 establishes communication with an NFC reader 50, the digitized temperature data signal may be read by the NFC reader 50.
In one embodiment, the signal processing unit 30 is a mixed signal microprocessor or a single chip microcomputer.
Specifically, the NFC transponder 40 adopts a dynamic dual-interface NFC transponder 40.
Further, the NFC protocol adopts an ISO144443-A/B protocol.
In one embodiment, the passive NFC temperature sensor 1 is a passive NFC tag, wherein the passive NFC temperature sensor 1 is powered by capturing an NFC radio frequency field, and the passive NFC temperature sensor 1 can perform temperature measurement in the radio frequency field of the NFC reader 50.
The passive NFC temperature sensor 1 is small in size, can be packaged in soft and hard mode, has passive characteristics, can realize non-contact measurement of irregular surfaces, is particularly suitable for scenes difficult to wire, and is wide in application, such as body temperature measurement, equipment running state monitoring, laboratory temperature monitoring, temperature monitoring inside a sealed cavity and the like.
In conclusion, the application the utility model discloses passive NFC temperature sensor 1's technical scheme has following beneficial effect at least: the passive NFC temperature sensor 1 of the utility model is close to the object to be measured through the temperature sensitive unit 10 to obtain the temperature data signal of the object to be measured and send the temperature data signal to the analog-to-digital converter 20 (ADC), the analog-to-digital converter 20 sends the temperature data signal to the signal processing unit 30 after carrying out digital conversion, the signal processing unit 30 receives and stores the digital temperature data signal and sends the digital temperature data signal to the NFC transponder 40, the NFC transponder 40 binds the digital temperature data signal to the NFC protocol, thereby outputting the digital temperature data signal, and the digital temperature data signal can be read by the NFC reader 50, the NFC temperature sensor 1 outputs the digital temperature data signal, the temperature information of the object to be measured can be known by looking over the temperature data displayed by the NFC reader 50, the use is convenient, the temperature measurement operation is simple.
In addition, the passive NFC temperature sensor 1 of the utility model is passive wireless measurement, passive means no standby time limitation, avoiding the measurement error caused by the replacement operation of the temperature sensor 1 and the measurement error between two sensors, wireless means no need to consider the limitation of wiring, and small in size, can be used in the occasions with narrow space, no wiring or difficult wiring, can be completely integrated into the measured environment and avoid the interference to the environment when the sensors are laid, can be packaged for the second time, so as to be suitable for the severe environments such as humidity, corrosivity and the like, moreover, the passive NFC temperature sensor 1 can be made into flexible, can be attached to the surface of the measured object for measurement, so as to be suitable for the irregular surface, is flexible to use and wide in range, and is passive without replacement, low in cost and maintenance-free, and high in precision and high stability, the temperature measurement resolution can reach 0.01, the calibration is not needed, and the use is very convenient.
The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations are also considered as the protection scope of the present invention.
Claims (9)
1. A passive NFC temperature sensor, comprising:
the temperature sensing unit acquires a temperature data signal;
the analog-to-digital converter receives the temperature data signal and carries out digital conversion on the temperature data signal;
an NFC transponder;
the signal processing unit receives and stores the digitized temperature data signal and sends the digitized temperature data signal to the NFC transponder;
the NFC transponder outputs a digitized temperature data signal, and the digitized temperature data signal can be read by an NFC reader.
2. The passive NFC temperature sensor of claim 1, wherein the temperature sensitive unit is a temperature sensitive chip.
3. The passive NFC temperature sensor of claim 2, wherein the analog-to-digital converter is a sixteen-bit analog-to-digital converter.
4. The passive NFC temperature sensor of claim 3, wherein the signal processing unit is a microprocessor or a single chip microcomputer.
5. A passive NFC temperature sensor according to claim 4, wherein the NFC transponder is a dynamic dual interface NFC transponder.
6. A passive NFC temperature sensor according to claim 5, characterised in that the NFC protocol is the ISO144443-A/B protocol.
7. The passive NFC temperature sensor of claim 6, wherein the passive NFC temperature sensor is a passive NFC tag.
8. The passive NFC temperature sensor of claim 7, wherein the passive NFC temperature sensor is powered by capturing an NFC radio frequency field.
9. The passive NFC temperature sensor of claim 8, wherein the passive NFC temperature sensor is operable within a radio frequency field of the NFC reader.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022599034.0U CN213274602U (en) | 2020-11-11 | 2020-11-11 | Passive NFC temperature sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022599034.0U CN213274602U (en) | 2020-11-11 | 2020-11-11 | Passive NFC temperature sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213274602U true CN213274602U (en) | 2021-05-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202022599034.0U Active CN213274602U (en) | 2020-11-11 | 2020-11-11 | Passive NFC temperature sensor |
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| CN (1) | CN213274602U (en) |
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- 2020-11-11 CN CN202022599034.0U patent/CN213274602U/en active Active
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