CN201772928U - Digital infrared canopy temperature sensor - Google Patents
Digital infrared canopy temperature sensor Download PDFInfo
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- CN201772928U CN201772928U CN2010200000494U CN201020000049U CN201772928U CN 201772928 U CN201772928 U CN 201772928U CN 2010200000494 U CN2010200000494 U CN 2010200000494U CN 201020000049 U CN201020000049 U CN 201020000049U CN 201772928 U CN201772928 U CN 201772928U
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Abstract
The utility model relates to a digital infrared canopy temperature sensor comprising a shell, a laser aiming lamp, a thermal insulation filling material, an infrared temperature measuring head, a circuit board and a purging air pipe, wherein the laser aiming part, the thermal insulation filling material, the infrared temperature measuring head, the circuit board and the purging air pipe are encapsulated in the shell, the infrared temperature measuring head is connected with the circuit board through an IIC bus, the circuit board is provided with a single-chip microcomputer, an EEPROM circuit, an SDI-12 interface circuit, a power supply circuit, a hardware wake-up circuit and a lightning protection circuit, the EEPROM circuit is connected on the single-chip microcomputer through the IIC bus, a laser aiming lamp circuit and the hardware wake-up circuit are respectively connected on the single-chip microcomputer, and the SDI-12 interface circuit is connected with a serial port of the single-chip microcomputer, and is connected with an external cable through the lightning protection circuit. The digital infrared canopy temperature sensor has the beneficial effects of no signal transmission error, novel structure, narrowed measurement range and high measurement precision.
Description
Technical field
The utility model relates to the wind speed and direction fields of measurement, the infrared canopy surface temperature sensor of especially a kind of digitizing.
Background technology
Infrared temperature-test technology is used for plant canopy temperature survey field, no disturbance, little to the plant influence, it is convenient to measure, and is subjected to moisture to compel association to research bar thing, the water consumption situation, accurately irrigating to instruct has very important meaning, but owing to there is not specialized equipment, classic method is measured inconvenient, inaccurate, personal error is big, and measurement means is not specially at canopy design, but adopts the hand-held temperature-measuring gun to measure, when carrying out the large tracts of land temperature data acquisition, need the manually-operated thermometric, the manual record data, efficient is low, measuring period is long, and data age is poor.Can not carry out online observation.The infrared canopy surface temperature sensor that the U.S. produces, simulating signal output, the causing property error of measuring accuracy, sensor all is subject to the resolution and the precision of the Analog-digital change-over circuit of data acquisition unit, and need user's calculating of programming, infer water regime and the water deficit of plant.
Adopt industrial general infrared sensor, because it uses the field measuring accuracy less demanding, and measurement range is wide, the resolution height.The external infrared canopy sensor special of producing, owing to adopt simulating signal output, systematic error is that transmission, the A/D transformed error of signal influences measuring accuracy.
The utility model content
The purpose of this utility model provides the infrared canopy surface temperature sensor of a kind of digitizing, has overcome the shortcoming that the said goods life-span is short, error is big, volume is big, use is inconvenient.
The purpose of this utility model is achieved through the following technical solutions:
The infrared canopy surface temperature sensor of a kind of digitizing, comprise shell (1), laser aiming lamp (2), insulation packing material (3), infrared temperature measuring head (4), circuit board (6) and purging tracheae (7), encapsulation laser aiming part (2) in the shell of described stainless steel structure (1), insulation packing material (3), infrared temperature measuring head (4), circuit board (6) and purging tracheae (7), described infrared temperature measuring head (4) and laser aiming lamp (2) are mounted in respectively on shell (1) sidewall, described infrared temperature measuring head (4) one sides also are provided with and purge tracheae (7), and purging tracheae (7) is terminal terminal relative with infrared temperature measuring head (4); The infrared temperature measuring head of described MLX90614 model (4) also is provided with eeprom circuit (11), SDI-12 interface circuit (12), power circuit (13), hardware wake-up circuit (14) and lightning protection circuit (15) by the single-chip microcomputer (10) on iic bus (5) the connecting circuit plate (6) on the described circuit board (6).
Insulation packing material (3) is adhered in described infrared temperature measuring head (4) outside.
Described eeprom circuit (11) is connected on the single-chip microcomputer (10) by iic bus (5), described laser aiming lamp (2), hardware wake-up circuit (14) are connected on the single-chip microcomputer (10), described SDI-12 interface circuit (12) is connected with the serial ports of single-chip microcomputer (10), and is connected with external cable (9) by lightning protection circuit (15); Described infrared temperature probe (4), single-chip microcomputer (10), SDI-12 interface circuit (12) connect power circuit (13) respectively.
Described single-chip microcomputer (10) carries out SDI-12 communication by SDI-12 interface circuit (12).
The beneficial effect of the infrared canopy surface temperature sensor of digitizing described in the utility model is: adopt the digitizing infrared temperature probe, the no signal transmission error, interface adopts the SDI-12 bus mode, novel structure, measurement range is suitable for the canopy growth temperature, measurement range is little, and the measuring accuracy height can be used for various accurate contact-free measurement of temperature; Possess the ambient temperature compensation circuit simultaneously, measuring accuracy is brought up to 0.2 degree, and single-chip microcomputer need not manually calculate by plant emissivity customization compensation; Combine microprocessor,, determine circuit structure, realize measurement function according to the special requirement that canopy surface temperature is measured; Characteristics such as the ambient temperature compensation circuit has efficiently, and is not affected by environment are calibrated compact conformation fully by factory; Band emissivity self compensating system, single-chip microcomputer compensates the outer infrared temperature that obtains, and makes output needle more accurate to plant canopy; No emissivity specification error, driftlessness contact error, no emissivity drift error, no heat of friction error, no user scalable error, no heat leakage error, no background reflectance error.
Description of drawings
Fig. 1 is the structural representation of the infrared canopy surface temperature sensor of the described digitizing of the utility model embodiment;
Fig. 2 is the infrared canopy surface temperature principle of sensors of the described digitizing of the utility model embodiment figure;
Fig. 3 is the circuit diagram of the infrared canopy surface temperature sensor of the described digitizing of the utility model embodiment.
Among the figure:
1, shell; 2, laser aiming lamp; 3, insulation packing material; 4, infrared temperature measuring head; 5, bus; 6, circuit board; 7, purge tracheae; 8, cable installation fittings; 9, cable; 10, single-chip microcomputer; 11, eeprom circuit; 12, SDI-12 interface circuit; 13, power circuit; 14, hardware wake-up circuit; 15, lightning protection circuit.
Embodiment
As shown in Figure 1, the infrared canopy surface temperature sensor of the described digitizing of the utility model embodiment, comprise shell 1, laser aiming lamp 2, insulation packing material 3, infrared temperature measuring head 4, circuit board 6 and purge tracheae 7, encapsulation laser aiming part 2, insulation packing material 3, infrared temperature measuring head 4, circuit board 6 and purging tracheae 7 in the shell 1 of described stainless steel structure, infrared temperature measuring head 4 is fixed on shell 1 one ends middle part, infrared temperature measuring head 4 ends are passed by shell 1 sidewall, and insulation packing material 3 is adhered in described infrared temperature measuring head 4 outsides; Described infrared temperature measuring head 4 one sides are provided with laser aiming lamp 2, and laser aiming lamp 2 ends pass from side wall of outer shell; Described infrared temperature measuring head 4 one sides also are provided with and purge tracheae 7, aim at infrared temperature measuring head 4 ends after purging tracheae 7 one end bendings, purging tracheae 7 other ends passes from shell 1 sidewall, purge tracheae 7 in use by the accurate infrared temperature measuring head 4 of external compression air purge, infrared temperature probe 4 lens surfaces that make cleaning.
Described infrared temperature measuring head 4 is by iic bus 5 connecting circuit plates 6, and circuit board 6 connects external cable 9, and described cable 9 is fixed on shell 1 sidewall by cable installation fittings 8.
Shown in Fig. 2 and 3, described circuit board 6 is provided with single-chip microcomputer 10, eeprom circuit 11, SDI-12 interface circuit 12, power circuit 13, hardware wake-up circuit 14 and lightning protection circuit 15, described eeprom circuit 11 is connected on the single-chip microcomputer 10 by iic bus 5, eeprom circuit 11 is used to calculate minimum value, maximal value, mean value, the maximum temperature difference value, eeprom circuit is an EEPROM (Electrically Erasable Programmable Read Only Memo), described laser aiming lamp 2 circuit are connected on the I/O mouth of single-chip microcomputer 10, by SDI-12 instruction control laser aiming lamp 2 circuit, make laser aiming lamp 2 aim at measured targets, described hardware wake-up circuit 14 is connected on the external interrupt I/O mouth of single-chip microcomputer 10, separate to send out by the high level on the SDI-12 bus and wake up, described SDI-12 interface circuit 12 is connected with the serial ports of single-chip microcomputer 10, is connected with external cable 9 by lightning protection circuit 15 again, has realized that single-chip microcomputer 10 carries out SDI-12 communication by SDI-12 interface circuit 12; Described infrared temperature probe 4, single-chip microcomputer 10, SDI-12 interface circuit 12 connect power circuit 13 respectively.
Described infrared temperature probe 4 is the MLX90614 model, and MLX90614 is that German Melexis company produces, and the sensing device among the MLX90614 is that one piece of silicon is connecting one deck by micromachined, to the unusual sensitive film of the infrared radiation of foreign object.The signal that the signal processing chip of customization is gathered sense film specially amplifies and digitizing, use prefabricated scale merit to calculate the temperature of testee then, be linear fully with the temperature of digital form output at last and can carry out compensatory variation of ambient temperature.The digital processing chip of MLX90614xAC has adopted the ADC of senior low noise amplifier, 17bit and the DSP unit of powerful in function, can adapt to from-40 ℃ to 125 ℃ operating temperature range, measure temperature range then from-40 ℃ to 125 ℃, precision has reached 0.02 ℃.When the testee temperature at 0 ℃ between 50 ℃ the time, the absolute accuracy of MLX90614xAC inductor is ± 0.5 ℃, then is ± 1 ℃ outside this scope.
Described laser aiming lamp 2: when need were confirmed the observation area, host computer sent an instruction, and after single-chip microcomputer 10 received, control laser aiming lamp 2 was lighted, and this lamp target line graph indicating area is the infrared thermography zone.
Described infrared temperature probe 4: infrared thermography sensor, built-in optical camera lens, digital signal output.
Described purging tracheae 7: sensor in the open air or other have when the dirt environment is medium-term and long-term to be used, the camera lens of infrared temperature probe 4 can laying dust, thus the accuracy that influence is measured utilizes to purge tracheae 7, adds the compression air, the dust on the camera lens can be blown away.
Described insulation packing material 3: can effectively suppress infrared temperature probe 4 environment temperature sudden changes of living in, thereby influence accuracy of measurement.
Described eeprom circuit 11: the pending data of preserving operating sensor configuration information needed and infrared temperature.
Lightning protection circuit 15: the superpotential of lightning induction can be released by GND, thus protection sensor integrated circuit.
Described hardware wake-up circuit 14: can send the wake-up level that host computer (data acquisition unit) sends to single-chip microcomputer 10, thereby single-chip microcomputer 10 is waken up.
Described SDI-12 interface circuit 12: can change the level signal in the single-chip microcomputer 10, make the level signal of its transmission meet the SDI-12 standard.
The control mode of power supply is:
Described single-chip microcomputer 10 and SDI-12 interface circuit 12 are the continued power mode, and to guarantee to receive the instruction of host computer (data acquisition unit), eeprom circuit 11 adopts the control power supply mode, when needs preservation and reading of data, by single-chip microcomputer 10 control power supplies; Described infrared temperature probe 4 adopts the control power supply mode, when needs read temperature, by single-chip microcomputer 10 control power supplies; Described laser aiming lamp 2 adopts the control power supply mode, when needs are decided target, sends instruction by host computer, single-chip microcomputer 10 control power supplies.
Main instruction and function:
M instruction: carry out one-shot measurement, and measurement result is stored.
XL1 instruction: laser aiming lamp 2 open command.
XL0 instruction: laser aiming lamp 2 out codes.
The M1 instruction: differential temperature survey instruction, and the difference storage that will work as a time measurement and a preceding measurement result, obtain for host computer.
The instruction of XM expansion composite measurement:
The each measured value of sensor all is kept in the eeprom circuit 11, after receiving the XM instruction, instruct first data after finishing to begin with previous XM, to this XM instruction data therebetween, calculate minimum value, maximal value, mean value, the maximum temperature difference value is finished after the calculating the storage in addition of these data, and original recorded data is removed.
D0 instruction: data are obtained instruction, and sensor receives after data that host computer sends obtain instruction, and sensor sends the temperature value of having measured and having stored by the M instruction to host computer.
Workflow:
After the sensor power supply, the every configuration of single-chip microcomputer 10 initialization, promptly enter dormant state after finishing, reduce power consumption, after host computer sent an instruction, SDI-12 interface circuit 12 can produce a high level, thereby single-chip microcomputer 10 is waken up to duty from dormant state, single-chip microcomputer 10 is separated the read command and the coupling of controlling oneself, instruct errorless after, immediately by the instruction execution corresponding work that receives.
After receiving M instruction, carry out one-shot measurement immediately, measurement result is stored in the eeprom circuit 11, receiving after data obtain instruction D instruction, this result is sent to host computer then.
After receiving M1 instruction, carry out second time immediately and measure, and a preceding measurement result is compared, temperature approach is stored in the eeprom circuit 11, then receive data obtain instruct D to instruct after, this result is sent to host computer.
After receiving the XM1 instruction, immediately the record of the storage in the eeprom circuit 11 is calculated, calculate minimum value, maximal value, mean value, maximum temperature difference value, finish after the calculating the storage in addition of these data, receiving after data obtain instruction D instruction, this result is sent to host computer then.
After receiving XL1 instruction, single-chip microcomputer 10 is changed to high level with the IO mouth, and the power supply of control laser aiming lamp 2 is opened, and after receiving instruction XL0 instruction, single-chip microcomputer 10 is changed to low level with IO, and laser aiming lamp 2 is closed.
Above-described embodiment; the utility model embodiment a kind of more preferably just; common variation and replacement that those skilled in the art carries out in the technical solutions of the utility model scope all should be included in the protection domain of technical solutions of the utility model.
Claims (4)
1. infrared canopy surface temperature sensor of digitizing, comprise shell (1), laser aiming lamp (2), insulation packing material (3), infrared temperature measuring head (4), circuit board (6) and purging tracheae (7), it is characterized in that: encapsulation laser aiming part (2) in the shell of described stainless steel structure (1), insulation packing material (3), infrared temperature measuring head (4), circuit board (6) and purging tracheae (7), described infrared temperature measuring head (4) and laser aiming lamp (2) are mounted in respectively on shell (1) sidewall, described infrared temperature measuring head (4) one sides also are provided with and purge tracheae (7), and purging tracheae (7) is terminal terminal relative with infrared temperature measuring head (4); The infrared temperature measuring head of described MLX90614 model (4) also is provided with eeprom circuit (11), SDI-12 interface circuit (12), power circuit (13), hardware wake-up circuit (14) and lightning protection circuit (15) by the single-chip microcomputer (10) on iic bus (5) the connecting circuit plate (6) on the described circuit board (6).
2. the infrared canopy surface temperature sensor of digitizing according to claim 1 is characterized in that: insulation packing material (3) is adhered in described infrared temperature measuring head (4) outside.
3. the infrared canopy surface temperature sensor of digitizing according to claim 1, it is characterized in that: described eeprom circuit (11) is connected on the single-chip microcomputer (10) by iic bus (5), described laser aiming lamp (2), hardware wake-up circuit (14) are connected on the single-chip microcomputer (10), described SDI-12 interface circuit (12) is connected with the serial ports of single-chip microcomputer (10), and is connected with external cable (9) by lightning protection circuit (15); Described infrared temperature probe (4), single-chip microcomputer (10), SDI-12 interface circuit (12) connect power circuit (13) respectively.
4. according to claim 1 or the infrared canopy surface temperature sensor of 3 described digitizings, it is characterized in that: described single-chip microcomputer (10) carries out SDI-12 communication by SDI-12 interface circuit (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010200000494U CN201772928U (en) | 2010-01-05 | 2010-01-05 | Digital infrared canopy temperature sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010200000494U CN201772928U (en) | 2010-01-05 | 2010-01-05 | Digital infrared canopy temperature sensor |
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| Publication Number | Publication Date |
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| CN201772928U true CN201772928U (en) | 2011-03-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010200000494U Expired - Fee Related CN201772928U (en) | 2010-01-05 | 2010-01-05 | Digital infrared canopy temperature sensor |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102507014A (en) * | 2011-11-07 | 2012-06-20 | 四川省电力公司绵阳电业局 | Switch cabinet infrared temperature measuring laser alignment device |
| CN103267578A (en) * | 2013-04-28 | 2013-08-28 | 山东康威通信技术股份有限公司 | Electric power high-voltage cable connector non-contact infrared temperature measurement system and temperature measurement method |
| CN107677376A (en) * | 2017-09-08 | 2018-02-09 | 北京农业信息技术研究中心 | A kind of plant temperature measuring equipment and method |
| CN109990900A (en) * | 2017-12-29 | 2019-07-09 | 宁波方太厨具有限公司 | The temperature measuring equipment and temp measuring method of thermometric objective body on a kind of electromagnetic stove |
| CN114526506A (en) * | 2022-02-24 | 2022-05-24 | 杭州老板电器股份有限公司 | Range hood and control method |
-
2010
- 2010-01-05 CN CN2010200000494U patent/CN201772928U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102507014A (en) * | 2011-11-07 | 2012-06-20 | 四川省电力公司绵阳电业局 | Switch cabinet infrared temperature measuring laser alignment device |
| CN103267578A (en) * | 2013-04-28 | 2013-08-28 | 山东康威通信技术股份有限公司 | Electric power high-voltage cable connector non-contact infrared temperature measurement system and temperature measurement method |
| CN103267578B (en) * | 2013-04-28 | 2015-05-06 | 山东康威通信技术股份有限公司 | Electric power high-voltage cable connector non-contact infrared temperature measurement system and temperature measurement method |
| CN107677376A (en) * | 2017-09-08 | 2018-02-09 | 北京农业信息技术研究中心 | A kind of plant temperature measuring equipment and method |
| CN107677376B (en) * | 2017-09-08 | 2019-09-10 | 北京农业信息技术研究中心 | A kind of plant temperature measuring equipment and method |
| CN109990900A (en) * | 2017-12-29 | 2019-07-09 | 宁波方太厨具有限公司 | The temperature measuring equipment and temp measuring method of thermometric objective body on a kind of electromagnetic stove |
| CN109990900B (en) * | 2017-12-29 | 2024-05-17 | 宁波方太厨具有限公司 | Temperature measuring device and temperature measuring method for temperature measuring target body on electromagnetic stove |
| CN114526506A (en) * | 2022-02-24 | 2022-05-24 | 杭州老板电器股份有限公司 | Range hood and control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110323 Termination date: 20130105 |