阅读说明：本技术 一种基于感温元件的信号采集方法及系统 (Signal acquisition method and system based on temperature sensing element ) 是由 吴彬 张晓冬 江国进 彭立 马建新 于 2019-11-22 设计创作，主要内容包括：本发明公开了一种基于感温元件的信号采集方法及系统,该方法包括：工程师站根据测点清单中的温度量程判断信号采集板卡所需配置的分段量程,将分段量程写入组态配置文件中；工程师站将组态配置文件传输至控制站；控制站接收组态配置文件,将组态配置文件发送至信号采集板卡；信号采集板卡根据组态配置文件中的分段量程设置板卡采集量程。该方法实现提高采集精度。(The invention discloses a signal acquisition method and a system based on a temperature sensing element, wherein the method comprises the following steps: the engineer station judges the sectional range required to be configured by the signal acquisition board card according to the temperature range in the measuring point list, and writes the sectional range into a configuration file; the engineer station transmits the configuration file to the control station; the control station receives the configuration file and sends the configuration file to the signal acquisition board card; and the signal acquisition board card sets the board card acquisition range according to the sectional range in the configuration file. The method improves the acquisition precision.)

1. A signal acquisition method based on a temperature-sensing element is characterized by comprising the following steps:

the engineer station judges the sectional range required to be configured by the signal acquisition board card according to the temperature range in the measuring point list, and writes the sectional range into a configuration file;

the engineer station transmits the configuration file to the control station;

the control station receives the configuration file and sends the configuration file to the signal acquisition board card;

and the signal acquisition board card sets the board card acquisition range according to the sectional range in the configuration file.

2. The method of claim 1, wherein the engineer station determines the segment measurement range required to be configured by the signal acquisition board card according to the temperature measurement range in the measurement point list, and writes the segment measurement range into a configuration file, including:

the engineer station calculates a resistance value or a millivolt value corresponding to the temperature range according to the temperature range in the measuring point list and the type of the temperature sensing element; wherein, the temperature sensing element comprises a thermal resistor or a thermocouple;

and the engineer station matches the sectional range of each channel of the board card according to the resistance value or the millivolt value, and writes parameters of the sectional range into a configuration file.

3. The method of claim 2, wherein the engineer station transmits the configuration file to the control station by downloading.

4. The method of claim 1, wherein after the signal acquisition board sets the board acquisition range according to the segment range in the configuration file, the method further comprises:

and the signal acquisition board card acquires signals according to the segmented measuring range in the configuration file.

5. A signal acquisition system based on a temperature-sensitive element, characterized in that it is used to implement the method according to any one of claims 1 to 4, and comprises:

the engineer station is used for judging the sectional range required to be configured by the signal acquisition board card according to the temperature range in the measuring point list and writing the sectional range into a configuration file; transmitting the configuration file to the control station;

the control station is used for receiving the configuration file and sending the configuration file to the signal acquisition board card;

and the signal acquisition board card is used for setting the board card acquisition range according to the segmented range in the configuration file.

6. The system of claim 5, wherein the engineer station comprises:

the calculation module is used for calculating a resistance value or a millivolt value corresponding to the temperature range according to the temperature range in the measuring point list and the type of the temperature sensing element; wherein, the temperature sensing element comprises a thermal resistor or a thermocouple;

and the matching module is used for matching the sectional range of each channel of the board card according to the resistance value or the millivolt value and writing the parameters of the sectional range into the configuration file.

And the transmission module is used for transmitting the configuration file to the control station.

7. The system of claim 6, wherein the transmission module is configured to transmit the configuration profile to the control station by downloading.

8. The system of claim 5, wherein the signal acquisition board is further configured to acquire signals according to the segment ranges in the configuration profile.

Technical Field

The invention relates to the technical field of temperature sensing elements, in particular to a signal acquisition method and system based on a temperature sensing element.

Background

Temperature signals in the nuclear power station are mainly collected through thermal resistors and thermocouples, the temperature collecting range is also divided into multiple ranges due to different temperature collecting areas, and different types of thermal resistors and thermocouples are used for collecting the temperature signals. At present, manufacturers at home and abroad mainly collect thermal resistors/thermocouples in the following ways: (1) the acquisition range of the board card is expanded, so that the range of all types of thermal resistors/thermocouples is covered; (2) setting acquisition ranges of different temperature intervals, wherein each board card can only set one acquisition range, but maintenance personnel are required to configure each board card on a maintenance tool; (3) and a plurality of single-range board cards are developed, and the overall acquisition precision is improved.

In the existing implementation scheme, different types of board cards are required to realize signal acquisition with different ranges, so that the number of modules used is increased, and the engineering implementation is influenced; in order to meet the requirement of the full acquisition range, part of manufacturers increase the acquisition range of the board card, and the scheme causes the reduction of the acquisition precision; in order to improve the acquisition precision, part of manufacturers set different acquisition ranges for configuration aiming at a thermal resistor or thermocouple acquisition device, and a configuration object only covers a module and cannot configure an independent channel, so that the use number of the modules is increased, and the engineering implementation is influenced; and maintenance personnel need to configure each module according to the process range of the measuring point list, so that human errors are increased, and the acquired signal range may not be consistent with the configuration range. Therefore, how to improve the acquisition precision is an urgent problem to be solved.

Disclosure of Invention

The invention aims to provide a signal acquisition method and a signal acquisition system based on a temperature sensing element so as to improve acquisition precision.

In order to solve the above technical problem, the present invention provides a signal acquisition method based on a temperature sensing element, including:

the engineer station judges the sectional range required to be configured by the signal acquisition board card according to the temperature range in the measuring point list, and writes the sectional range into a configuration file;

the engineer station transmits the configuration file to the control station;

the control station receives the configuration file and sends the configuration file to the signal acquisition board card;

and the signal acquisition board card sets the board card acquisition range according to the sectional range in the configuration file.

Preferably, the engineer station judges the segment range to be configured by the signal acquisition board card according to the temperature range in the measurement point list, and writes the segment range into the configuration file, including:

the engineer station calculates a resistance value or a millivolt value corresponding to the temperature range according to the temperature range in the measuring point list and the type of the temperature sensing element; wherein, the temperature sensing element comprises a thermal resistor or a thermocouple;

and the engineer station matches the sectional range of each channel of the board card according to the resistance value or the millivolt value, and writes parameters of the sectional range into a configuration file.

Preferably, the engineer station transmits the configuration file to the control station in a downloading manner.

Preferably, after the signal acquisition board card sets the board card acquisition range according to the segment range in the configuration file, the method further includes:

and the signal acquisition board card acquires signals according to the segmented measuring range in the configuration file.

The invention also provides a signal acquisition system based on the temperature-sensing element, which is used for realizing the method and comprises the following steps:

the engineer station is used for judging the sectional range required to be configured by the signal acquisition board card according to the temperature range in the measuring point list and writing the sectional range into a configuration file; transmitting the configuration file to the control station;

the control station is used for receiving the configuration file and sending the configuration file to the signal acquisition board card;

and the signal acquisition board card is used for setting the board card acquisition range according to the segmented range in the configuration file.

Preferably, the engineer station comprises:

the calculation module is used for calculating a resistance value or a millivolt value corresponding to the temperature range according to the temperature range in the measuring point list and the type of the temperature sensing element; wherein, the temperature sensing element comprises a thermal resistor or a thermocouple;

and the matching module is used for matching the sectional range of each channel of the board card according to the resistance value or the millivolt value and writing the parameters of the sectional range into the configuration file.

And the transmission module is used for transmitting the configuration file to the control station.

Preferably, the transmission module is specifically configured to transmit the configuration profile to the control station in a downloading manner.

Preferably, the signal acquisition board card is further configured to acquire a signal according to a segment range in the configuration file.

According to the signal acquisition method and system based on the temperature sensing element, an engineer station judges the sectional range required to be configured by a signal acquisition board card according to the temperature range in a measuring point list, and writes the sectional range into a configuration file; the engineer station transmits the configuration file to the control station; the control station receives the configuration file and sends the configuration file to the signal acquisition board card; and the signal acquisition board card sets the board card acquisition range according to the sectional range in the configuration file. It is thus clear that the acquisition integrated circuit board supports the configuration of multistage range, promotes the collection resolution ratio of thermal resistance or thermocouple acquisition integrated circuit board to promote whole thermal resistance or thermocouple precision, adopted the design of multistage range promptly, through the resolution ratio that promotes the integrated circuit board, and then promote the precision of whole collection link, so promote the collection precision of thermal resistance or thermocouple, realize improving the collection precision.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a flowchart of a signal acquisition method based on a temperature-sensing element according to the present invention;

fig. 2 is a schematic structural diagram of a signal acquisition system based on a temperature-sensing element according to the present invention.

Detailed Description

The core of the invention is to provide a signal acquisition method and a signal acquisition system based on a temperature sensing element so as to improve the acquisition precision.

In order to make the technical solutions of the present invention better understood, the technical solutions 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 a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, fig. 1 is a flowchart of a signal acquisition method based on a temperature sensing element according to the present invention, the method includes the following steps:

s11: the engineer station judges the sectional range required to be configured by the signal acquisition board card according to the temperature range in the measuring point list, and writes the sectional range into a configuration file;

s12: the engineer station transmits the configuration file to the control station;

s13: the control station receives the configuration file and sends the configuration file to the signal acquisition board card;

s14: and the signal acquisition board card sets the board card acquisition range according to the sectional range in the configuration file.

Therefore, in the method, the acquisition board card supports multi-range configuration, and the acquisition resolution of the thermal resistor or thermocouple acquisition board card is improved, so that the accuracy of the whole thermal resistor or thermocouple is improved.

The method solves the technical problems of acquisition range of the thermal resistor or the thermocouple, improvement of acquisition precision and reduction of human errors caused by manual configuration. In order to meet the requirement for collecting various thermal resistance or thermocouple signals, the collecting range of the board card is enlarged, and various types of thermal resistance or thermocouple signals can be collected. However, the larger the acquisition range is, the lower the resolution of the board card is. In order to improve the acquisition precision of the thermal resistor or the thermocouple, the method adopts a multi-range design, and the precision of the whole acquisition link is improved by improving the resolution of the board card.

For example, taking a 16-bit A/D as an example, the full scale is divided into 65535 scales. Each 1 scale is 1/65535 at full scale, about 0.15 parts per million. If the full scale range is-90 mV, the corresponding voltage of 1 scale is 2.7466uV, namely the resolution is 2.7466 uV. Taking a K-type thermocouple as an example, the temperature changes by 1uV at every 1 ℃ near the lower limit of the temperature, the resolution introduces error of 2.7 ℃ at most, changes by 34uV at every 1 ℃ near the upper limit of the temperature, introduces error of 0.08 ℃ at most, and comprehensively introduces error of 2.7 ℃ at most. If the full scale range is-10 mV to 10mV, the corresponding voltage of 1 scale is 0.3052uV, namely the resolution is 0.3052uV, taking a K-type thermocouple as an example, the error of 0.3 ℃ is introduced at most.

Therefore, the small measuring range is segmented, and the error introduced by the resolution ratio can be reduced, so that the overall precision is improved.

Based on the above method, further, step S11 includes the following steps:

s21: the engineer station calculates a resistance value or a millivolt value corresponding to the temperature range according to the temperature range in the measuring point list and the type of the temperature sensing element;

wherein, the temperature sensing element comprises a thermal resistor or a thermocouple;

s22: and the engineer station matches the sectional range of each channel of the board card according to the resistance value or the millivolt value, and writes parameters of the sectional range into a configuration file.

The method can set different segmented ranges according to application, for example, the resistance signal acquisition range can be set to four ranges of 40-140 omega, 80-210 omega, 90-290 omega and 0-312.5 omega, and the thermocouple signal can be set to four ranges of-10 mV, -10-20 mV, -30 mV and-90 mV.

In step S12, the engineer station transmits the configuration file to the control station by downloading.

Further, after step S14, the signal acquisition board acquires signals according to the segment measurement range in the configuration file.

Because the board card is designed with multiple measuring ranges, engineering personnel need to set the measuring range corresponding to the board card according to the process measuring range in the measuring point list during engineering implementation, the workload of the engineering personnel is increased, and the risk of configuration errors exists. Aiming at the configuration complexity of multi-range, the method provides two range configuration modes:

1. the manual configuration mode comprises the following steps: the engineering personnel manually select the corresponding segmented range of the device according to the temperature range;

2. the automatic configuration mode comprises the following steps: and automatically calculating the board card range of the channel according to the temperature range configured in the measuring point list. The specific process is as follows:

(1) the maintenance tool automatically converts the resistance/millivolt value used by the temperature range pair according to the temperature range of the measuring point list and the type of the thermal resistance/thermocouple signal;

(2) the maintenance tool automatically matches the sectional range of each channel of the board card according to the resistance/millivolt value, and writes parameters of the sectional range into a configuration file;

(3) and the maintenance tool downloads the configuration file to the control station, and the board card acquires signals according to the segmented measuring range.

The multi-range design of the board card is suitable for signal acquisition of various thermal resistors or thermocouples. The engineer station supports automatic calculation of the resistance value or the millivolt value corresponding to the measuring point according to the process range of the thermal resistor or the thermocouple measuring point in the measuring point list, and the engineer station judges the applicable range of the channel corresponding to the measuring point according to the resistance value or the millivolt value corresponding to the measuring point.

Specifically, the engineer station automatically judges the acquisition range to be configured by the board card according to the process range of the thermal resistor or thermocouple measuring point in the measuring point list, puts the selected range into configuration information, and transmits the configuration information to the control station in a downloading mode; a controller in the control station receives the configuration information and transmits the configuration information to the board card, and an I/O algorithm of the controller is also set according to the related measuring range; and the thermal resistor or thermocouple acquisition board card sets the board card acquisition range according to the configuration information.

Therefore, in the method, the thermal resistor or thermocouple acquisition board card supports multi-range configuration, and the acquisition resolution of the thermal resistor or thermocouple acquisition board card can be improved, so that the overall thermal resistor or thermocouple accuracy of the system is improved. The range configuration is carried out according to the channel in the support, promotes the board card channel rate of utilization, saves the rack space. The engineer station supports automatic judgment of the acquisition range to be configured by the board card according to the process range of the thermal resistor or thermocouple measuring points in the measuring point list, so that the engineering implementation manpower is reduced, and the human error is reduced.

Referring to fig. 2, fig. 2 is a schematic structural diagram of a signal acquisition system based on a temperature-sensing element for implementing the above method, the system including:

the engineer station 101 is used for judging the sectional range required to be configured by the signal acquisition board card according to the temperature range in the measuring point list and writing the sectional range into a configuration file; transmitting the configuration file to the control station;

the control station 102 is used for receiving the configuration file and sending the configuration file to the signal acquisition board card;

and the signal acquisition board card 103 is used for setting a board card acquisition range according to the segmented range in the configuration file.

It is thus clear that in this system, the collection integrated circuit board supports the configuration of multistage range, promotes the collection resolution ratio of thermal resistance or thermocouple collection integrated circuit board to promote whole thermal resistance or thermocouple precision, adopted the design of multistage range promptly, through the resolution ratio that promotes the integrated circuit board, and then promote the precision of whole collection link, so promote the collection precision of thermal resistance or thermocouple, realize improving the collection precision.

Further, the engineer station includes:

the calculation module is used for calculating a resistance value or a millivolt value corresponding to the temperature range according to the temperature range in the measuring point list and the type of the temperature sensing element; wherein, the temperature sensing element comprises a thermal resistor or a thermocouple;

and the matching module is used for matching the sectional range of each channel of the board card according to the resistance value or the millivolt value and writing the parameters of the sectional range into the configuration file.

And the transmission module is used for transmitting the configuration file to the control station.

Further, the transmission module is specifically configured to transmit the configuration profile to the control station in a downloading manner.

Furthermore, the signal acquisition board card is also used for acquiring signals according to the segmented measuring range in the configuration file.

The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same or similar parts among the embodiments are referred to each other. For the system disclosed by the embodiment, the description is relatively simple because the system corresponds to the method disclosed by the embodiment, and the relevant points can be referred to the method part for description.

Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in Random Access Memory (RAM), memory, Read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.

The above description provides a signal acquisition method and system based on a temperature-sensing element in detail. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.