CN110553788A - Calibration method of sensor signal transmitting device - Google Patents

Calibration method of sensor signal transmitting device Download PDF

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Publication number
CN110553788A
CN110553788A CN201910841590.3A CN201910841590A CN110553788A CN 110553788 A CN110553788 A CN 110553788A CN 201910841590 A CN201910841590 A CN 201910841590A CN 110553788 A CN110553788 A CN 110553788A
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CN
China
Prior art keywords
calibration
vzero
values
sensor
zero point
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Pending
Application number
CN201910841590.3A
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Chinese (zh)
Inventor
彭雯
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hodinger Baldwin Suzhou Electronic Measurement Technology Co Ltd
Hottinger Bruel and Kjaer Co Ltd
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Hodinger Baldwin Suzhou Electronic Measurement Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Hodinger Baldwin Suzhou Electronic Measurement Technology Co Ltd filed Critical Hodinger Baldwin Suzhou Electronic Measurement Technology Co Ltd
Priority to CN201910841590.3A priority Critical patent/CN110553788A/en
Publication of CN110553788A publication Critical patent/CN110553788A/en
Pending legal-status Critical Current

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Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01LMEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L25/00Testing or calibrating of apparatus for measuring force, torque, work, mechanical power, or mechanical efficiency
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01LMEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L27/00Testing or calibrating of apparatus for measuring fluid pressure

Abstract

the scheme is a calibration method of a sensor signal transmitting device, which specifically comprises the following steps: presetting calibration parameters: calculating standard GI, GD, GO and Vzero values according to the preset calibration parameters, and writing the standard GI, GD, GO and Vzero values into an RAM; automatically unloading to zero point, and carrying out zero point calibration; automatically loading to full scale, and calibrating the full scale; calculating actual GI, GD, GO and Vzero values, and rewriting the actual GI, GD, GO and Vzero values into the RAM; after the weight is automatically unloaded, whether the output of the PGA308 calibration sensor at the zero point meets the preset requirement is detected; if yes, writing actual GI, GD, GO and Vzero values into a programmable memory; reading the programmable memory, judging whether the written value is correct, and if so, finishing adjusting the range of the signal transmitting device; if not, the steps are executed again. The calibration method can automatically detect the process parameters and transmit the measured values in a specific signal form so as to be displayed and adjusted, and has high precision and stable and reliable work.

Description

calibration method of sensor signal transmitting device
Technical Field
The invention relates to the field of industrial control, in particular to a calibration method of a sensor signal transmitting device.
background
with the development of industry, people have higher and higher requirements on the aspects of precision, user experience and the like of the transmitter. Pressure is one of the important parameters in industrial production processes, and accurate detection and control of the pressure are indispensable conditions for ensuring the operation of the production process and the safety of equipment. The PGA308 is an ideal building block for resistive bridge sensor conditioning and general data. Digitally programmable coarse offsets, fine offsets and may be controlled in real time or permanently programmed into the PGA 308. The prior art has the following defects: the sensor is calibrated manually, the speed is slow, and the efficiency is relatively low.
Disclosure of Invention
in order to overcome the defects of the prior art, the invention aims to provide a calibration method of a sensor signal transmitting device, which has higher precision and stable and reliable work.
in order to achieve the purpose, the invention is realized by the following technical scheme:
a calibration method of a sensor signal transmitting device specifically comprises the following steps:
Step (1): presetting calibration parameters: calculating standard GI, GD, GO and Vzero values according to the preset calibration parameters, and writing the standard GI, GD, GO and Vzero values into an RAM;
step (2): automatically unloading to zero point, and carrying out zero point calibration;
And (3): automatically loading to full scale, and calibrating the full scale;
And (4): calculating actual GI, GD, GO and Vzero values, and rewriting the actual GI, GD, GO and Vzero values into the RAM;
and (5): after the weight is automatically unloaded, whether the output of the PGA308 calibration sensor at the zero point meets the preset requirement is detected;
and (6): if the result in step (5) is yes, writing the actual GI, GD, GO, Vzero values to the programmable memory;
And (7): reading the programmable memory and judging whether the written value is correct or not;
And (8): if the result in the step (7) is yes, the adjustment of the measuring range of the signal transmitting device is finished;
And (9): and (4) if the result in the step (7) is negative, re-executing the step (1).
preferably, the calibration method of the sensor signal transmitter is characterized in that the preset calibration parameters are determined according to theoretical zero and full degrees of the PGA308 calibration sensor.
Preferably, in the calibration method of the sensor signal transmitter, whether the predetermined requirement is met in the step (5) is determined according to the PGA308 calibration of the zero-point range and the full range of the sensor.
Preferably, in the calibration method of the sensor signal transmitting apparatus, the step (7) of determining whether the written value is correct specifically determines whether the written value is consistent with a value in the read RAM, and if so, the written value is correct.
Preferably, the calibration method of the sensor signal transmitter, wherein step (1) further comprises a PGA308 calibration sensor communicating with a computer, specifically communicating with the computer in a manner of RS232 to UART adapter.
the invention has the advantages that: the calibration method of the sensor signal transmitting device adopts the PGA308 to calibrate the sensor to realize automatic calibration, repeats the configuration and measurement process until correct voltage is obtained, and can record test data during calibration so as to facilitate subsequent query. The calibration method can automatically detect the process parameters and transmit the measured values in a specific signal form so as to be displayed and adjusted, has higher precision and stable and reliable work, does not need to be calibrated frequently, and can track the data during calibration.
Drawings
Fig. 1 is a schematic diagram of a calibration method of a sensor signal transmitting device according to an embodiment of the present invention.
Detailed Description
the present invention will be described in further detail with reference to the following embodiments and the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.
As shown in fig. 1, the calibration method of the sensor signal transmitting device specifically includes the following steps:
s1: presetting calibration parameters: calculating standard GI, GD, GO and Vzero values according to the preset calibration parameters, and writing the standard GI, GD, GO and Vzero values into an RAM;
S2: automatically unloading to zero point, and carrying out zero point calibration;
s3: automatically loading to full scale, and calibrating the full scale;
s4: calculating actual GI, GD, GO and Vzero values, and rewriting the actual GI, GD, GO and Vzero values into the RAM;
S5: after the weight is automatically unloaded, whether the output of the PGA308 calibration sensor at the zero point meets the preset requirement is detected;
S6: if the result of S5 is yes, writing the actual GI, GD, GO, Vzero values to the programmable memory;
S7: reading the programmable memory and judging whether the written value is correct or not;
s8: if the result of S7 is yes, finishing adjusting the measuring range of the signal transmitting device;
S9: if the result of S7 is NO, S1 is re-executed. The loop S1-S7 is repeated until the written value is correct, and if the result of S7 is positive, the adjustment of the span of the signal transmission device is completed. The PGA308 calibration sensor is automatically calibrated, the configuration and measurement process may be repeated until the correct voltage is obtained, and test data may be recorded during calibration to facilitate subsequent interrogation.
The calibration method of the sensor signal transmitting device adopts the PGA308 to calibrate the sensor to realize automatic calibration, repeats the configuration and measurement process until correct voltage is obtained, and can record test data during calibration so as to facilitate subsequent query. The calibration method can automatically detect the process parameters and transmit the measured values in a specific signal form so as to be displayed and adjusted, has higher precision and stable and reliable work, does not need to be calibrated frequently, and can track the data during calibration.
preferably, the preset calibration parameters are determined according to the theoretical zero point and the full scale of the PGA308 calibration sensor.
Whether the preset requirements are met in the step (5) is determined according to the self zero-point range and the full range of the PGA308 calibration sensor.
and (4) judging whether the written value is correct or not in the step (7), namely judging whether the written value is consistent with the value in the read RAM or not, and if so, judging that the written value is correct.
PGA308 communication, namely, the communication between the PGA308 and a computer can be realized by using an RS 232-UART adapter, the Tx and Rx of the RS 232-UART adapter are connected with One-Wire of the PGA308, the RS232 baud rate range is 4.8K ~ 114K, no parity check exists, 8 bit data bits and 1 bit stop bit, the first character of a data packet sent by the RS232 is necessarily 0x55 and is used for detecting the baud rate of the PGA308 One-Wire communication.
the working principle of the PGA308 is as follows: vout = [ (Vin + Vcoarse) × GI + Vzero ] × GD = GO.
wherein, Vout: outputting voltage;
Vin: differential voltage input at the ends of Vin1 and Vin 2;
Vcoarse: coarse adjustment of zero point;
vzero: fine adjustment of zero point;
GI, GD, GO: respectively corresponding to 3 amplification factors;
while embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.

Claims (5)

1. A calibration method of a sensor signal transmitting device is characterized by comprising the following steps:
Step (1): presetting calibration parameters: calculating standard GI, GD, GO and Vzero values according to the preset calibration parameters, and writing the standard GI, GD, GO and Vzero values into an RAM;
step (2): automatically unloading to zero point, and carrying out zero point calibration;
and (3): automatically loading to full scale, and calibrating the full scale;
And (4): calculating actual GI, GD, GO and Vzero values, and rewriting the actual GI, GD, GO and Vzero values into the RAM;
and (5): after the weight is automatically unloaded, whether the output of the PGA308 calibration sensor at the zero point meets the preset requirement is detected;
and (6): if the result of the step (5) is yes, writing the actual GI, GD, GO and Vzero values into a programmable memory;
And (7): reading the programmable memory and judging whether the written value in the step (6) is correct or not;
And (8): if the result of the step (7) is yes, the adjustment of the measuring range of the signal transmitting device is completed;
and (9): and (5) if the result of the step (7) is negative, re-executing the step (1).
2. The method of calibrating a sensor signal transmitter according to claim 1, wherein the predetermined calibration parameters are determined based on the theoretical zero and full scale of the PGA308 calibration sensor.
3. The method for calibrating a sensor signal transmitting device according to claim 1, wherein the step (5) determines whether the predetermined requirements are met, particularly, whether the PGA308 calibrates the range of the zero point and the range of the full scale of the sensor.
4. a calibration method for a transducer signal transmitter according to claim 1, characterized in that said step (7) of determining whether the written value is correct or not, in particular, determining whether the written value is identical to the value in the read RAM, and if so, determining that the written value is correct.
5. The method for calibrating a sensor signal transmitter according to claim 1, wherein step (1) is preceded by a PGA308 calibration sensor communicating with a computer, in particular, communicating with the computer by means of an RS232 to UART adapter.
CN201910841590.3A 2019-09-06 2019-09-06 Calibration method of sensor signal transmitting device Pending CN110553788A (en)

Priority Applications (1)

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CN201910841590.3A CN110553788A (en) 2019-09-06 2019-09-06 Calibration method of sensor signal transmitting device

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Application Number Priority Date Filing Date Title
CN201910841590.3A CN110553788A (en) 2019-09-06 2019-09-06 Calibration method of sensor signal transmitting device

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112051002A (en) * 2020-08-12 2020-12-08 西安工业大学 Batch automatic calibration system and calibration method for pressure transmitters

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Publication number Priority date Publication date Assignee Title
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US9024264B2 (en) * 2011-10-18 2015-05-05 Siemens Medical Solutions Usa, Inc. Temperature compensation for a detection device in an imaging system and detection devices and imaging systems therefrom
CN109656607A (en) * 2019-01-03 2019-04-19 广西玉柴机器股份有限公司 A kind of full address scaling method that supporting super large nominal data amount and system
CN209027546U (en) * 2018-10-08 2019-06-25 北京华航无线电测量研究所 A kind of distributed sensor node apparatus monitored for liquid condition in pipeline

Patent Citations (4)

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Publication number Priority date Publication date Assignee Title
US9024264B2 (en) * 2011-10-18 2015-05-05 Siemens Medical Solutions Usa, Inc. Temperature compensation for a detection device in an imaging system and detection devices and imaging systems therefrom
CN203349854U (en) * 2013-07-08 2013-12-18 郑冬方 High precision digital sensor calibration test system based on PC machine
CN209027546U (en) * 2018-10-08 2019-06-25 北京华航无线电测量研究所 A kind of distributed sensor node apparatus monitored for liquid condition in pipeline
CN109656607A (en) * 2019-01-03 2019-04-19 广西玉柴机器股份有限公司 A kind of full address scaling method that supporting super large nominal data amount and system

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Publication number Priority date Publication date Assignee Title
CN112051002A (en) * 2020-08-12 2020-12-08 西安工业大学 Batch automatic calibration system and calibration method for pressure transmitters

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Address after: 215000, No. 106, Heng Shan Road, Suzhou hi tech Development Zone, Jiangsu, Suzhou

Applicant after: Huodinggebikai (Suzhou) Electronic Measurement Technology Co., Ltd

Address before: 215000, No. 106, Heng Shan Road, Suzhou hi tech Development Zone, Jiangsu, Suzhou

Applicant before: HOTTINGER BALDWIN (SUZHOU) ELECTRONIC MEASUREMENT TECHNOLOGY Co.,Ltd.

RJ01 Rejection of invention patent application after publication
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Application publication date: 20191210