CN103916230A - Sensor identification method, host computer, sensor and sensor identification system - Google Patents

Abstract

The invention provides a sensor identification method, a host computer, a sensor and a sensor identification system. By receiving a connection request, the connection request is sent when the sensor is connected and includes the identification information of the sensor; identification and verification of the sensor is performed, And based on the identification and verification results, it is determined whether the sensor is connected successfully, so as to realize the plug and play of the sensor, which has the characteristics of good accuracy and fast response speed. And has high reliability.

Description

Sensor identification method, upper computer, sensor and sensor identification system

technical field

The invention relates to the field of communication technology, and specifically relates to a 485 half-duplex connection intelligent sensor identification method, a host computer, a sensor and a sensor identification system.

Background technique

In existing industrial applications, there are a large number of communication modes using 485 half-duplex, which can support quality-guaranteed serial communication within 1000 meters to achieve low-cost and high-quality connections. However, the application of 485 half-duplex generally does not connect a lot of external devices (such as sensors). How to discover the connection and removal of sensors in a short period of time and communicate has become a technical problem in the 485 half-duplex communication mode. , and the sensors connected to the bus generally do not have identification signals for connecting or unplugging at the hardware level.

The existing processing method of access detection is to continuously check whether there is a new sensor access through the serial port polling, and if there is, a communication attempt is made, and the polling is not continued. After the sensor is connected, it passively waits for the host computer to contact. Only after the host computer discovers the new device and authenticates the access, can it be connected to the serial bus.

Existing handling of unplug detection is to periodically take readings from all sensors, and if a sensor does not return, wait for a period of time before attempting to contact that sensor. After a certain number of communications, it is determined that there is no return, and it is judged that the sensor is off the bus.

Therefore, there are the following problems in the existing processing method of access and extraction detection:

(1), serial processing, long waiting time. The processing of sensor access needs to wait for the start of the next polling cycle, and also needs to wait for the polling ranking. The processing of unplugging is similar, and processing of multiple polling cycles is also required.

(2) Data and control flow are not separated, making development difficult. Sensor identification, upgrade, restart, etc. are control commands, which process the working status of the sensor, while connection and reading are data streams, which read the attributes or working data of the sensor. There is no distinction between the two. When the reading is abnormal, the It is necessary to consider whether the sensor will be lost suddenly. When the sensor is pulled out, several readings are required to see if there is a return value. The entire process is judged and controlled by data, and the accuracy of the judgment is poor.

(3) The bus usage efficiency is low. All operations are waiting for the active processing of the host computer, and the bus waits for a long time. When the program design is not perfect or a new scene appears, the host computer cannot handle it, and the system will be unstable or suspended animation, resulting in low bus efficiency. Poor customer experience.

Contents of the invention

The invention provides a sensor identification method, a host computer, a sensor and a sensor identification system, which have the characteristics of plug and play, good accuracy and fast response speed.

The present invention provides scheme as follows:

An embodiment of the present invention provides a sensor identification method, including:

Receive a connection request, the connection request is sent by the sensor when the sensor is connected, and the connection request includes a sensor identification information;

Based on the connection request, the sensor is identified and verified, and based on the identification and verified result, it is determined whether the sensor is connected successfully.

Preferably, performing identification verification on the sensor based on the connection request, and determining whether the sensor access is successful based on the identification verification result includes:

Judging whether the sensor identification information included in the connection request is valid, and obtaining a first judgment result;

If the first judgment result is that the sensor identification information is valid, it is determined that the sensor access is a valid access, otherwise, it is determined that the sensor access is an invalid access.

Preferably, performing identification verification on the sensor based on the connection request, and determining whether the sensor access is successful based on the identification verification result further includes:

After the first judgment result is that the sensor identification information is valid, send a read attribute request to the sensor;

judging whether the sensor can be identified according to the attribute information returned by the sensor based on the read attribute request, and obtaining a second judgment result;

If the second determination result is that the sensor can be identified, it is determined that the sensor access is a valid access, otherwise, it is determined that the sensor access is an invalid access.

Preferably, performing identification verification on the sensor based on the connection request, and determining whether the sensor access is successful based on the identification verification result further includes:

After determining that the sensor access is a valid access, sending confirmation information to the sensor;

According to the connection verification information returned by the sensor based on the confirmation information, it is determined whether the access of the sensor is successful.

Preferably, after determining that the sensor access is successful, the method further includes:

adding the sensor to the currently monitored sensor array;

A monitoring signal is sent to the sensors in the sensor array at a first preset time interval, and the monitoring signal is used to monitor whether a sensor exists in the sensor array.

Preferably, the method also includes:

The value of each sensor in the sensor array is polled at a second preset time interval, and the time at which the sensor is polled each time is recorded.

Preferably, the method also includes:

If the difference between the current time of the system and the last polled time of the sensor is greater than a preset failure threshold, it is determined that the sensor is invalid.

Preferably, the method also includes:

If the monitoring signal returned by the sensor is not received within the third preset time interval, and/or it is determined that the sensor is invalid, it is determined that the sensor has been pulled out;

Removes the dialed out sensor from the currently monitored array of sensors and signals a sensor dialed out.

Preferably, the method also includes:

When the value of the sensor obtained by polling is higher than the preset alarm threshold, an alarm thread is started.

Preferably, the starting alarm thread includes:

According to the alarm level and alarm settings, trigger the corresponding alarm action.

The embodiment of the present invention also provides a host computer, which is characterized in that it includes:

The receiving module is configured to receive a connection request, the connection request is sent by the sensor when the sensor is connected, and the connection request includes a sensor identification information;

The identification verification module is configured to perform identification verification on the sensor based on the connection request, and determine whether the sensor access is successful based on the identification verification result.

Preferably, the identification verification module includes:

A first judging unit, configured to judge whether the sensor identification information included in the connection request is valid;

The determination unit is configured to determine that the sensor access is valid when the first determination unit determines that the sensor identification information is valid, or determine that the sensor access is invalid.

Preferably, the identification verification module also includes:

A sending unit, configured to send an attribute read request to the sensor when the first judging unit judges that the sensor identification information is valid;

A second judging unit, configured to judge whether the sensor can be identified according to the attribute information returned by the sensor based on the attribute read request;

The determining module is further configured to determine that the sensor access is valid when the second judging unit determines that the sensor can be identified, or determine that the sensor access is invalid.

Preferably, the sending unit is further configured to send confirmation information to the sensor when the determining module determines that the sensor access is valid;

The determining unit is further configured to determine whether the connection of the sensor is successful based on the connection verification information returned by the sensor based on the confirmation information.

Preferably, the host computer also includes:

An adding module, configured to add the sensor to the currently monitored sensor array after the identification and verification module determines that the sensor is successfully connected;

A monitoring module, configured to send a monitoring signal to the sensors in the sensor array at a first preset time interval, and the monitoring signal is used to monitor whether a sensor exists in the sensor array.

Preferably, the host computer also includes:

The polling module is configured to poll the values of the sensors in the sensor array at a second preset time interval, and record the time when the sensors are polled each time.

Preferably, the host computer also includes:

The failure judging module is used to judge that the sensor is invalid if the difference between the current time of the system and the time when the sensor was last polled is greater than a preset failure threshold.

Preferably, the host computer also includes:

The dialing out judging module is used to judge that the sensor has been pulled out if the monitoring signal returned by the sensor is not received within the third preset time interval, and/or the failure judging module judges that the sensor is invalid ;

The dial-out processing module is configured to remove the dial-out sensor from the currently monitored sensor array and send a sensor dial-out signal.

Preferably, the host computer also includes:

The alarm module is configured to start an alarm thread when the value of the sensor acquired by the polling module is higher than a preset alarm threshold.

The embodiment of the present invention also provides a sensor, including:

The sending module is used to send a connection request when the sensor is connected, so that the upper computer can identify and verify the sensor based on the connection request, and determine whether the sensor access is valid based on the result of the recognition and verification. The connection request includes a sensor identification information.

Preferably, the sending module is further configured to send at least one of sensor attribute information and connection verification information when the host computer identifies and verifies the sensor.

The embodiment of the present invention also provides a sensor recognition system, including a sensor and a host computer, wherein:

The sensor is configured to send a connection request when the sensor is connected, and the connection request includes sensor identification information;

The upper computer is configured to receive the connection request sent by the sensor, and based on the connection request, perform identification verification on the sensor, and based on the identification verification result, determine whether the sensor access is successful.

It can be seen from the above that the sensor identification method, host computer, sensor and sensor identification system provided by the embodiments of the present invention receive a connection request, which is sent when the sensor is connected and includes the identification information of the sensor , identify and verify the sensor, and determine whether the sensor is connected successfully based on the result of the identification and verification, so as to realize the plug and play of the sensor, which has the characteristics of good accuracy and fast response speed. And has high reliability.

Description of drawings

FIG. 1 is a schematic flow diagram of a sensor identification method provided by an embodiment of the present invention;

2 is a schematic diagram of the sensor identification verification process in the sensor identification method provided by the embodiment of the present invention;

FIG. 3 is a schematic flow diagram II of a sensor identification method provided by an embodiment of the present invention;

Fig. 4 is a schematic structural diagram of a sensor identification system provided by an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a host computer provided by an embodiment of the present invention.

Detailed ways

An embodiment of the present invention provides a sensor identification method, as shown in Figure 1, including:

Step 11, receiving a connection request, the connection request is sent by the sensor when the sensor is connected, and the connection request includes a sensor identification information;

Step 12: Perform identification verification on the sensor based on the connection request, and determine whether the sensor access is successful based on the identification verification result.

The sensor identification method provided by the embodiment of the present invention can realize the plug-and-play of the sensor, and has high reliability.

In the technical solution provided by the embodiment of the present invention, the interrupt method is used to realize the access processing of the host computer to the sensor, which mainly includes two parts. The first one is that the sensor can actively send information after it is connected to the 485 bus, and the second is the bus. Access requests can be received and processed in a timely manner, otherwise data collisions will occur on the bus and communication will be difficult. By realizing the plug-and-play method, the sensor access can be discovered and applied by the host computer, the master-slave mode is changed to a dual-master mode, and the serial mode is changed to an interrupt mode.

The interruption method involved in the embodiment of the present invention specifically means that the sensor actively sends a message to interrupt the current processing of the upper computer, that is, the upper computer suspends other work, communicates with the sensor, incorporates it into the system, and resumes the previous work.

The 485 bus is an asynchronous half-duplex communication bus. At a certain moment, the bus can only show one state. Generally, it is suitable for the master to communicate with the extension. The extensions coordinate the time-sharing of the bus by formulating a reasonable communication protocol. The communication data in the 485 bus is sent in frames and packets, and each packet of data consists of boot code, length code, address code, command code, content, check code and other parts. The boot code is the boot header used to synchronize each packet of data; the length code is the total length of this packet of data; the command code is the control command from the host to the extension (or the extension answers the host); the address code is the local address of the extension No.; "Content" is the various information in this packet of data; the check code is the check mark of this packet of data, and different methods such as parity check can be used.

In this specific embodiment, when a new sensor is connected, the sensor is the main port, which continuously sends access requests until the upper computer responds.

After the upper computer responds to access the sensor, except for the first connected sensor, the other ports will change from the master port to the slave port, and switch back to the traditional master-slave communication.

In an optional embodiment of the present invention, the process of identifying and verifying the sensor based on the connection request, and determining whether the sensor access is successful based on the result of the identification verification may further include:

Judging whether the sensor identification information included in the connection request is valid, and obtaining a first judgment result;

If the first judgment result is that the sensor identification information is valid, it is determined that the sensor access is valid; otherwise, it is determined that the sensor access is invalid, that is, the sensor access fails.

In an optional embodiment of the present invention, the process of performing identification verification on the sensor based on the connection request, and determining whether the sensor access is successful based on the identification verification result may further include:

After the first judgment result is that the sensor identification information is valid, send a read attribute request to the sensor;

judging whether the sensor can be identified according to the attribute information returned by the sensor based on the read attribute request, and obtaining a second judgment result;

If the second determination result is that the sensor can be identified, it is determined that the sensor access is a valid access, otherwise, it is determined that the sensor access is an invalid access.

In an optional embodiment of the present invention, the process of identifying and verifying the sensor based on the connection request, and determining whether the sensor access is successful based on the result of the identification verification may further include:

After determining that the sensor access is a valid access, sending confirmation information to the sensor;

According to the connection verification information returned by the sensor based on the confirmation information, it is determined whether the access of the sensor is successful.

In a specific embodiment of the present invention, the identification and verification process of the sensor can also be realized according to the process shown in Figure 2, including:

Step 21, the sensor sends a connection request, the sensor identification information carried by the connection request;

Step 22, the host computer receives the connection request, and sends a read attribute request when the sensor identification information carried by the connection request is valid;

Step 23, the sensor sends the sensor attribute information according to the received attribute read request;

Step 24, the host computer judges whether the corresponding sensor can be identified according to the received sensor attribute information, and if it can be identified, then sends a confirmation message;

Step 25, the sensor sends connection verification according to the received confirmation information;

Step 26, the host computer determines that the corresponding sensor is successfully connected according to the received connection verification.

After the above-mentioned interaction between the sensor and the host computer, the host computer has been able to identify the sensor and call the corresponding function of the sensor, but when calling the corresponding function of the sensor, it also needs to manage the state and reading of the sensor, specifically through the control flow thread and data flow Thread implementation.

Corresponding control flow threads may specifically include: monitoring threads and failure threads.

The corresponding data flow thread may specifically include: a reading thread and an alarm thread.

In the embodiment of the present invention, the access identification, data reading, alarm processing and extraction identification of the sensor can be realized through the control flow thread and the data flow thread, so as to complete the core processing flow of the entire monitoring process. The monitoring thread, the reading thread and the failure detection thread jointly maintain a semaphore (an array of sensors currently being monitored).

The monitoring thread involved in the present invention can specifically be understood as a real-time monitoring operation on a sensor that has been successfully connected, and the monitoring operation can be used to confirm whether a dial-out event occurs in the sensor.

Then, in an optional embodiment of the present invention, after the host computer determines that the sensor is connected successfully, it may specifically include the following processing steps:

adding the sensor to the currently monitored sensor array;

A monitoring signal is sent to the sensors in the sensor array at a first preset time interval, and the monitoring signal is used to monitor whether a sensor exists in the sensor array.

In order to ensure that whether a dial-out event occurs in the sensor is detected as soon as possible, the first preset time interval involved in the embodiment of the present invention can be set relatively small, such as 0.1 second, that is, the sending frequency of the monitoring signal can be 0.1 second. To timely determine whether the sensor in the sensor array still exists in the sensor array, that is, whether the sensor has a dial-out event.

It should be noted here that the sensor involved in the embodiment of the present invention may directly return the monitoring signal after receiving the monitoring signal, so that the host computer can receive and confirm whether the sensor still exists in the sensor array.

In addition, when the host computer does not receive the monitoring signal returned by the sensor within the third preset time interval, it can be determined that the sensor is dialed out, that is, the sensor is dialed out. Moreover, the third preset time interval may be slightly longer than the first preset time interval, such as 0.3 seconds and so on.

The reading thread involved in the embodiment of the present invention can be specifically understood as the process of interaction between the upper computer and the sensor.

That is, in an optional embodiment of the present invention, after the sensor is added to the sensor array, that is, the sensor is under the monitoring of the monitoring thread, the following processing steps may be specifically included:

The value of each sensor in the sensor array is polled at a second preset time interval, and the time at which the sensor is polled each time is recorded.

Specifically, the reading thread can poll the sensors in the currently monitored sensor array at a preset time interval (specifically greater than the sending interval of the monitoring signal), and send reading requests, one at a time, and each sensor interval can be 1 second, etc. , and the polling period may specifically be 15 seconds or the like.

Since the sensors that are currently used are non-frequent and drastic changes such as temperature and humidity, and for sensors that change rapidly, the cycle can be set to a few seconds. In actual application, according to different sensor performances and different maturity levels, the above time can be configured to achieve overall balance and a good user experience.

After the reading thread obtains the value of the sensor, it analyzes the value and performs the next communication according to the function code.

Based on the above description, it can be seen that in the sensor identification method provided by the embodiment of the present invention, the start time of the reading thread is when the sensor is inserted, and the close time is when the sensor is pulled out. The reading thread reads the data of each sensor in a fixed period. If it finds that there is a monitoring thread interruption event, it stops reading, turns to the interactive authentication of the newly added sensor, and incorporates the sensor into the network. If the reading thread fails to read a sensor, it passes the information to the invalidation thread, which handles the invalidation. After a normal reading, forward the information to the alarm thread. Continue to cycle through the readings, running all the time.

Due to the fact that the electronic product may have weak soldering or poor contact, in such a bad situation, the host computer may not be able to obtain the value of the sensor, or may not be able to receive the monitoring signal returned by the sensor. However, in such a bad situation, the sensor does not actually have a dial-out event. Therefore, the embodiment of the present invention introduces an invalidation thread to determine whether the sensor is invalidated.

Specifically, the effectiveness thread can determine whether the sensor is invalid by judging whether the difference between the current time of the system and the last polled time of the sensor is greater than a preset failure threshold.

In a specific application, the failure threshold may specifically be twice the polling period for sensor readings.

Since the failure of the sensor can also be understood as a dial-out event occurring on the sensor, in the embodiment of the present invention, it may also be determined whether a dial-out event occurs on the sensor based on whether the sensor fails.

It can be seen that, in the embodiment of the present invention, based on at least one of the monitoring thread and the failure thread, it can be confirmed in time whether the sensor has a dial-out event.

That is, in an optional embodiment of the present invention, the following steps may also be specifically involved:

If the monitoring signal returned by the sensor is not received within the third preset time interval, and/or it is determined that the sensor is invalid, it is determined that the sensor has been pulled out.

In the embodiment of the present invention, after it is determined that the sensor has been pulled out, the following operations may also be involved:

Removes the dialed out sensor from the currently monitored array of sensors and signals a sensor dialed out.

The alarm thread involved in the present invention specifically refers to the alarm process that is started when the value of the sensor acquired by the reading thread through polling is higher than the preset alarm threshold.

After starting the alarm thread, different alarms can be triggered according to the alarm level and alarm settings, including lighting, vibration, sound, text messages, etc.

At the same time, in the embodiment of the present invention, the alarm record may be saved for processing.

By adopting the above-mentioned technical solution, the embodiment of the present invention proposes a dual-master port method to solve the interrupt mode in which the sensor actively sends out a request, changing from passive to active, and proposing a new idea for sensor network optimization; proposing an interrupt mode for communication , only the interrupt method can realize event-based processing, and can realize parallel processing from serial processing to time-sharing, and there is a possibility of a new implementation method; it is proposed to manage control and data separately, straighten out the architecture of system processing, and improve System scalability. At the same time, the processing speed is improved, which also lays the foundation for the subsequent system upgrade and maintenance.

In the following, a detailed description will be given of a sensor identification verification and control process of a sensor identification method provided by an embodiment of the present invention.

As shown in Figure 3, the process specifically may include:

Step 31, when the sensor is connected, the sensor sends a connection request, and the connection request carries the sensor identification information.

Step 32, after receiving the connection request, the host computer judges whether the sensor identification information carried in the connection request is valid, if the judgment result is valid, then executes step 34, otherwise executes step 33, that is, the host computer determines that the sensor access is invalid.

Step 34, the host computer sends a request to read attributes to the sensor.

Step 35, the sensor sends its own attribute information to the host computer.

The sensor attribute information involved in the embodiments of the present invention may specifically include attribute information such as the manufacturer, type, development time, version, and unit of the sensor.

Step 36, the host computer judges whether the sensor attribute information can be identified, and if the judgment result is yes, then executes step 37, otherwise executes step 33, that is, the host computer determines that the sensor access is invalid.

Step 37, the upper computer sends confirmation information to the sensor.

In step 38, the sensor returns connection verification information to the host computer based on the above confirmation information.

In step 39, the host computer confirms whether the sensor access is successful based on the connection verification information.

If the sensor access is successful, step 310 is subsequently performed, otherwise step 33 can be performed, and the host computer determines that the sensor access is invalid, which is equivalent to declaring sensor access identification.

Step 310, the host computer adds the successfully connected sensors to the currently monitored sensor array.

Step 311 , the host computer sends monitoring signals to the sensors in the sensor array according to a first preset time interval, so as to determine whether a dial-out event occurs in the sensors.

The subsequent host computer can execute step 312 and step 313 respectively.

Wherein, in step 312, the upper computer judges whether the monitoring signal returned by the sensor is received within the second preset time interval, and when the monitoring signal returned by the sensor is still not received after exceeding the second preset time interval, then the step 316.

Step 313 , the host computer polls the values of the sensors in the sensor array at a third preset time interval, and records the time when the sensors are polled each time.

If the value of the sensor polled by the host computer is higher than the preset alarm threshold, step 314 is executed, that is, an alarm thread is started, and a corresponding alarm action is triggered according to the alarm level and alarm settings.

If the difference between the current time of the system and the last polled time of the sensor is greater than the preset failure threshold, step 315 is executed, that is, it is determined that the sensor is invalid.

Then, when at least one of step 312 or 315 generates a trigger condition, that is, after the second preset time interval is exceeded, the monitoring signal returned by the sensor is still not received, and/or the sensor is determined to be invalid, then step 316 can be subsequently performed , to determine that the sensor has sent a dialout event, remove the dialed out sensor from the array of currently monitored sensors and signal a sensor dialout.

The implementation of the sensor identification method provided by the above embodiments of the present invention can realize the plug-and-play of the sensor, has the characteristics of good accuracy, fast response speed, and high reliability. At the same time, when the sensor is dialed out, the dial-out event can be detected in time to provide processing space for new sensor access.

The embodiment of the present invention also provides a sensor recognition system, as shown in FIG. 4 , the system may specifically include a sensor 41 and a host computer 42 . in:

The sensor 41 is configured to send a connection request when accessing the network, where the connection request includes sensor identification information.

The host computer 42 is configured to receive the connection request sent by the sensor 41, and based on the connection request, perform identification verification on the sensor 41, and based on the identification verification result, determine whether the connection of the sensor 41 is successful.

The sensor 41 involved in the embodiment of the present invention may specifically include a sending module, which is used to send a connection request to a device on the network side, such as a host computer, when the sensor is connected to a network using, for example, a 485 half-duplex communication mode .

The connection request may specifically include information such as sensor identification.

In addition, the sending module included in the sensor 41 may specifically be used to send at least one item of sensor attribute information and connection verification information during the process of identifying and verifying the sensor on the network side.

And the upper computer 42 involved in the embodiment of the present invention, as shown in accompanying drawing 5, specifically can comprise:

The receiving module 421 is configured to receive a connection request.

Specifically, the connection request may be sent by the sensor 41 when the sensor 41 accesses the network, and the connection request may specifically include information such as a sensor identification.

The identification verification module 422 is configured to perform identification verification on the sensor 41 based on the connection request, and determine whether the access of the sensor 41 is successful based on the identification verification result.

In an optional embodiment of the present invention, the identification verification module 422 may specifically include:

A first judging unit, configured to judge whether the sensor identification information included in the connection request is valid;

The determining unit is configured to determine that the sensor access is valid when the first judging unit determines that the sensor identification information is valid, otherwise determine that the sensor access is invalid.

In an optional embodiment of the present invention, the identification verification module 422 may specifically include:

A sending unit, configured to send a read attribute request to the sensor when the first judging unit judges that the sensor identification information is valid;

A second judging unit, configured to judge whether the sensor can be identified according to the attribute information returned by the sensor based on the attribute read request;

The determining module is further configured to determine that the sensor access is valid when the second judging unit determines that the sensor can be identified, or determine that the sensor access is invalid.

In an optional embodiment of the present invention, the sending unit may also be configured to send confirmation information to the sensor when the determining module determines that the sensor access is valid;

The determining unit is further configured to determine whether the connection of the sensor is successful based on the connection verification information returned by the sensor based on the confirmation information.

In an optional embodiment of the present invention, the upper computer 42 may specifically include:

A adding module, configured to add the sensor to the currently monitored sensor array after the identification verification module 422 determines that the sensor is successfully connected;

A monitoring module, configured to send a monitoring signal to the sensors in the sensor array at a first preset time interval, and the monitoring signal is used to monitor whether a sensor exists in the sensor array.

In an optional embodiment of the present invention, the upper computer 42 may specifically include:

The polling module is configured to poll the values of the sensors in the sensor array at a second preset time interval, and record the time when the sensors are polled each time.

In an optional embodiment of the present invention, the upper computer 42 may specifically include:

The failure judging module is used to judge that the sensor is invalid if the difference between the current time of the system and the time when the sensor was last polled is greater than a preset failure threshold.

In an optional embodiment of the present invention, the upper computer 42 may specifically include:

The dialing out judging module is used to judge that the sensor has been pulled out if the monitoring signal returned by the sensor is not received within the third preset time interval, and/or the failure judging module judges that the sensor is invalid ;

The dial-out processing module is configured to remove the dial-out sensor from the currently monitored sensor array and send a sensor dial-out signal.

In an optional embodiment of the present invention, the upper computer 42 may specifically include:

The alarm module is configured to start an alarm thread when the value of the sensor acquired by the polling module is higher than a preset alarm threshold.

Using the sensor identification method and system provided by the embodiment of the present invention, as well as the sensor and the upper computer, in the 485 half-duplex communication mode, all the sensors are connected using the master port mode, not only one master port on the entire bus , and the rest are slave ports; the sensor sends a connection request, the host computer reads the configuration, the sensor sends the configuration, the host computer confirms the configuration, and the sensor replies to confirm the five steps. After that, the sensor enters the mode of waiting for readings, which reduces the occupation of the bus and realizes a method of converting from traditional sensors to smart sensors; multi-threading is used to identify and manage sensors, and two control threads are used to access the thread and the invalid thread , two data threads, the reading thread and the alarm thread, realize the coordinated and orderly management of the whole process.

The above is only the embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications should also be regarded as Be the protection scope of the present invention.

Claims (22)

1. an identification method of sensor, is characterized in that, comprising:

Receive a connection request, described connection request, is in the time that transducer accesses, and is sent by transducer, and described connection request comprises a sensor identification information;

Based on described connection request, described transducer is identified to checking, and based on identification the result, determine that whether described transducer access is successful.

2. the method for claim 1, is characterized in that, described based on described connection request, and described transducer is identified to checking, and based on identification the result, determines whether described transducer access successfully comprises:

Judge that whether the sensor identification information that described connection request comprises is effective, obtain the first judged result;

If described the first judged result is that described sensor identification information is effective, determine that described transducer access is for effectively access, no person determines that described transducer access is invalid access.

3. method as claimed in claim 2, is characterized in that, described based on described connection request, and described transducer is identified to checking, and based on identification the result, determines whether described transducer access successfully also comprises:

Described the first judged result be described sensor identification information effectively after, send and read attribute request to described transducer;

Read based on described the attribute information that attribute request is returned according to described transducer, judge whether to identify described transducer, obtain the second judged result;

If described the second judged result for can identify described transducer, determines that described transducer access is for effectively access, no person determines that described transducer access is invalid access.

4. method as claimed in claim 2 or claim 3, is characterized in that, described based on described connection request, and described transducer is identified to checking, and based on identification the result, determines whether described transducer access successfully also comprises:

After determining that described transducer access is for effective access, send confirmation to described transducer;

The connectivity verification information of returning based on described confirmation according to described transducer, determines that whether described transducer access is successful.

5. the method for claim 1, is characterized in that, described method also comprises after definite described transducer accesses successfully:

Described transducer is joined in current monitored transducer array;

Send pilot signal by the first Preset Time interval to the transducer in transducer array, whether described pilot signal is present in described transducer array for monitoring sensor.

6. method as claimed in claim 5, is characterized in that, described method also comprises:

By the numerical value of each transducer in the second Preset Time interval poll transducer array, and record transducer polled time each time.

7. method as claimed in claim 6, is characterized in that, described method also comprises:

If the difference between the last polled time of current time in system and transducer, while being greater than default failure threshold, judges described sensor failure.

8. method as claimed in claim 7, is characterized in that, described method also comprises:

If do not receive the described pilot signal that transducer returns in the 3rd Preset Time interval, and/or judge described sensor failure, judge that described transducer is pulled out;

Transferred to signal by transfering to transducer to remove and send transducer from current monitored transducer array.

9. method as claimed in claim 6, is characterized in that, described method also comprises:

The numerical value of the transducer obtaining when poll during higher than default alarm threshold, starts alarm thread.

10. method as claimed in claim 9, is characterized in that, described startup alarm thread comprises:

According to alarm grade and alarm setting, trigger corresponding alarm action.

11. 1 kinds of host computers, is characterized in that, comprising:

Receiver module, for receiving a connection request, described connection request, is in the time that transducer accesses, and is sent by transducer, described connection request comprises a sensor identification information;

Identification authentication module, for based on described connection request, identifies checking to described transducer, and based on identification the result, determines that whether described transducer access is successful.

12. host computers as claimed in claim 11, is characterized in that, described identification authentication module comprises:

The first judging unit, whether effective for judging the sensor identification information that described connection request comprises;

Determining unit, in the time that described the first judging unit judges that described sensor identification information is effective, determines that described transducer access is for effectively access, and no person determines that described transducer access is invalid access.

13. host computers as claimed in claim 12, is characterized in that, described identification authentication module also comprises:

Transmitting element, in the time that described the first judging unit judges that described sensor identification information is effective, sends and reads attribute request to described transducer;

The second judging unit, for reading based on described the attribute information that attribute request is returned according to described transducer, judges whether to identify described transducer;

Described determination module also, in the time that described the second judging unit judgement can be identified described transducer, determines that described transducer access is for effectively access, and no person determines that described transducer access is invalid access.

14. host computers as described in claim 12 or 13, is characterized in that, described transmitting element is also for determining that at described determination module described transducer accesses when effective, sends confirmation to described transducer;

Described determining unit, the also connectivity verification information for returning based on described confirmation based on described transducer, determines whether described transducer connects successful.

15. host computers as claimed in claim 11, is characterized in that, also comprise:

Add module, after determining that at described identification authentication module described transducer accesses successfully, described transducer is joined in current monitored transducer array;

Monitoring module, for sending pilot signal by the first Preset Time interval to the transducer of transducer array, whether described pilot signal is present in described transducer array for monitoring sensor.

16. host computers as claimed in claim 15, is characterized in that, also comprise:

Poll module, for by the numerical value of the each transducer of the second Preset Time interval poll transducer array, and records transducer polled time each time.

17. host computers as claimed in claim 16, is characterized in that, also comprise:

Inefficacy judge module, if for the difference between current time in system and last polled time of transducer, while being greater than default failure threshold, judge described sensor failure.

18. host computers as claimed in claim 17, is characterized in that, also comprise:

Transfer to judge module, if for do not receive the described pilot signal that transducer returns in the 3rd Preset Time interval, and/or described inefficacy judge module judges described sensor failure, judges that described transducer is pulled out;

Transfer to processing module, for being transferred to signal by transfering to transducer to remove and send transducer from current monitored transducer array.

19. host computers as claimed in claim 16, is characterized in that, also comprise:

Alarm module, during higher than default alarm threshold, starts alarm thread for the numerical value of the transducer that obtains when poll module.

20. 1 kinds of transducers, is characterized in that, comprising:

Sending module, in the time that transducer accesses, sends connection request, based on described connection request, described transducer is identified to checking for host computer, and based on identification the result, determine whether described transducer access is effective, and described connection request comprises a sensor identification information.

21. transducers as claimed in claim 20, is characterized in that, described sending module also, in the time that described host computer is verified described transducer identification, sends at least one in attribute sensor information and connectivity verification information.

22. 1 kinds of transducer recognition systems, is characterized in that, comprise transducer and host computer, wherein:

Described transducer, in the time that transducer accesses, sends connection request, and described connection request comprises a sensor identification information;

Host computer, the connection request sending for receiving described transducer, and based on described connection request, described transducer is identified to checking, and based on identification the result, determine that whether described transducer access is successful.