WO2015192374A1

WO2015192374A1 - Method and device for measuring distance characteristic information

Info

Publication number: WO2015192374A1
Application number: PCT/CN2014/080409
Authority: WO
Inventors: 邵起明; 郑明吉
Original assignee: 奇点新源国际技术开发(北京)有限公司
Priority date: 2014-06-20
Filing date: 2014-06-20
Publication date: 2015-12-23
Also published as: CN105556901A; CN105556901B

Abstract

A method and device for measuring distance characteristic information. The method is applicable in a bus system. The bus system comprises a control node and at least one mounted node. The control node and the mounted node communicate with each other via a bus. The method comprises: a control node determines the length of time from the transmission of a distance measurement command to a first mounted node to the reception of a reply message from the first mounted node (201), where the first mounted node is one mounted node among the at least one mounted node; and, the control node calculates distance characteristic information between the control node and the first mounted node on the basis of the length of time (202). The method and device allow the measurement of the physical distance between the control node and each mounted node mounted on the bus and are inexpensive to implement.

Description

Method and device for measuring distance characteristic information

TECHNICAL FIELD The present invention relates to the field of communications, and in particular, to a method and an apparatus for measuring distance feature information. BACKGROUND OF THE INVENTION Currently, if it is necessary to measure the distance between two physical nodes, it is generally achieved by using an echo generated by discontinuous transmission of the dielectric. Specifically, the distance between the two physical nodes is determined by measuring the time difference between the transmitted signal and the reflected signal.

However, in a bus system such as a 485 bus system, if the existing distance measurement method is used to measure the physical distance between the control node and a mounted node mounted on the bus, the bus needs to be disconnected to be implemented, and the bus is mounted. When multiple nodes are mounted, it is difficult to measure the physical distance between the control node and each mounted node mounted on the bus by using the existing distance measurement method, and the implementation cost is high. SUMMARY OF THE INVENTION Embodiments of the present invention provide a method and a device for measuring distance feature information, which are capable of measuring distance feature information between a control node and each mounted node mounted on a bus, and achieving low cost.

In a first aspect, a method for measuring distance characteristic information is provided, which is applied to a bus system, the bus system includes a control node and at least one mount node, and the control node and the mount node communicate via a bus; Methods include:

The control node determines a length of time from the sending of the ranging command to the first mount node to the receipt of the reply message of the first mount node; the first mount node is one of the at least one mount node Carrier node

And the control node calculates distance feature information between the control node and the first mount node according to the length of time.

Optionally, the control node determines a length of time from the sending of the ranging command to the first mount node to the receiving the reply message of the first mount node, including:

The control node listens to whether there is data transmission on the sending port and the receiving port;

The control node sends a ranging command to the first mount node, and receives a reply message of the first mount node for the ranging command; The control node determines a length of time from the first bit of the ranging command sent by the transmitting port to the first bit of the reply message received by the receiving port.

Optionally, the determining, by detecting the first bit of the ranging command sent by the sending port, to the receiving port, receiving the first bit of the reply message, includes:

Determining, by means of timing, a length of time from when the transmitting port detects the first bit of the ranging command to when the receiving port receives the end of the first bit of the reply message; or, by metering a pulse The numberwise manner determines the length of time from when the transmitting port hears the first bit of the ranging command to when the receiving port receives the end of the first bit of the reply message.

Optionally, before the calculating, by the control node, the distance feature information between the control node and the first mount node, the method further includes:

The control node repeatedly performs the step of determining the length of time by the preset number of times - 1 time to obtain a preset number of time lengths;

The calculating, by the control node, distance feature information between the control node and the first mount node according to the length of time includes:

The control node performs filtering processing on the obtained preset number of time lengths;

The control node performs statistical calculation according to the filtering result to obtain a statistical value of the length of time; the control node calculates distance feature information between the control node and the first mounted node according to the statistical value of the length of time.

Optionally, the control node performs filtering processing on the obtained preset number of times of time, including: for the preset number of times, the control node removes a length of time in which the value is greater than or equal to the first set threshold. And a length of time when the value is less than or equal to the second set threshold, and the first set threshold is greater than the second set threshold.

Optionally, the control node determines, before the sending of the ranging command to the first mount node to the time length of receiving the reply message of the first mount node, the method further includes:

The control node sends a ranging preparation command to the first mount node, where the ranging preparation command is used to instruct the first mount node to perform ranging preparation;

The control node receives a ranging preparation reply message sent by the first mount node, and the ranging preparation reply message is used to notify the control node that the ranging preparation of the first mount node is completed.

Optionally, the distance feature information is specifically a time length, a distance value, or a proportional value.

In a second aspect, a method for measuring distance characteristic information is provided, which is applied to a bus system, where the bus system includes a control node and at least one mount node, and the control node and the mount node pass Bus communication; the method includes:

The first mount node receives the ranging command sent by the control node; the first mount node is one of the at least one mount node;

The first mount node sends a ranging command reply message to the control node, so that the control node listens for a length of time from sending a ranging command to the first mount node to receiving the reply message of the first mount node Calculating distance feature information between the control node and the first mount node according to the length of time.

Optionally, before the first loading node receives the ranging command sent by the control node, the method further includes: the first mounting node receiving a ranging preparation command sent by the control node, where the ranging preparation command is used Instructing the first mount node to perform ranging preparation;

After completing the ranging preparation, the first loading node sends a ranging preparation reply message to the control node, where the ranging preparation reply message is used to notify the control node of the ranging of the first mounting node. Ready to finish.

In a third aspect, a measurement device for distance feature information is provided, which is applied to a control node in a bus system, the bus system includes a control node and at least one mount node, and the control node and the mount node pass Bus communication; the device includes:

a first determining unit, configured to determine a length of time from sending a ranging command to the first mount node to receiving the reply message of the first mount node; the first mount node is the at least one mount One of the nodes in the node;

And a calculating unit, configured to calculate distance feature information between the control node and the first mount node according to the length of time determined by the first determining unit.

Optionally, the first determining unit includes:

a listening subunit, configured to listen for data transmission on the sending port and the receiving port;

a transceiver unit, configured to send a ranging command to the first mount node, and receive a reply message of the first mount node to the ranging command;

Determining a subunit for determining a length of time from the first bit of the ranging command sent from the listening port to the first bit of the reply message received by the receiving port.

Optionally, the determining subunit is specifically configured to:

Determining, by means of timing, a length of time from the first bit of the ranging command sent by the transmitting port to the first bit of the reply message received by the receiving port; or

Determining the range of the ranging command sent from the listening port by detecting the number of pulses The length of time from one bit to the receiving port receiving the first bit of the reply message.

Optionally, the first determining unit is further configured to: repeatedly perform the preset number of times - the step of determining the length of time, to obtain a preset number of time lengths;

The calculation unit specifically includes:

a filtering subunit, configured to filter a preset number of times obtained by the first determining unit;

The average calculation subunit is configured to perform statistical calculation according to the filtering result to obtain a statistical value of the length of time;

a distance calculation unit, configured to calculate distance feature information between the control node and the first mount node according to the statistical value of the time length.

Optionally, the filtering subunit is specifically configured to: remove, for the preset number of times, a length of time in which the value is greater than or equal to the first set threshold, and a time length in which the value is less than or equal to the second set threshold, The first set threshold is greater than the second set threshold.

Optionally, the method further includes:

a first sending unit, configured to send a ranging preparation command to the first mounting node, where the ranging preparation command is used to instruct the first mounting node to perform ranging preparation;

And a first receiving unit, configured to receive a ranging preparation reply message sent by the first loading node, where the ranging preparation reply message is used to notify the control node that the ranging preparation of the first mounting node is completed.

A fourth aspect provides a measurement device for distance feature information, which is applied to a mount node in a bus system, the bus system including a control node and at least one mount node, and between the control node and the mount node Communicating via the bus; the device comprises:

a second receiving unit, configured to receive a ranging command sent by the control node; the first mounting node is one of the at least one mounting node;

a second sending unit, configured to send a ranging command reply message to the control node, so that the control node listens to send a ranging command from the first mounting node to the receiving the reply message of the first mounting node. a length of time, and calculating distance feature information between the control node and the first mount node according to the length of time.

Optionally, the second receiving unit is further configured to: receive a ranging preparation command sent by the control node, where the ranging preparation command is used to instruct the first mounting node to perform ranging preparation;

The second sending unit is further configured to: after the ranging preparation is completed, send a ranging standard to the control node. The standby response message is used to notify the control node that the ranging preparation of the first mount node is completed.

In the embodiment of the present invention, the control node and the mount node communicate through the bus; the control node determines the length of time from the sending of the ranging command to the first mount node to the receipt of the reply message of the first mount node; The first mount node is one of the at least one mount node; the control node calculates distance feature information between the control node and the first mount node according to the length of time. Therefore, the measurement of the distance characteristic information between the control node and the first mount node is realized by transmitting the message through the bus; the measurement method of the distance feature information does not need to disconnect the bus, and the implementation is low in difficulty and low in cost. BRIEF DESCRIPTION OF THE 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 embodiments or the description of the prior art will be briefly described below, and obviously, in the following description The drawings are only some of the embodiments of the present invention, and other drawings may be obtained from those skilled in the art without departing from the drawings.

FIG. 1 is a schematic diagram of an application scenario according to an embodiment of the present invention;

2 is a schematic diagram of a first embodiment of a method for measuring distance feature information according to an embodiment of the present invention; FIG. 3 is a schematic diagram of a second embodiment of a method for measuring distance feature information according to an embodiment of the present invention; FIG. 4 is a measurement of distance feature information according to an embodiment of the present invention; FIG. 5 is a schematic diagram of a fourth embodiment of a method for measuring distance characteristic information according to an embodiment of the present invention; FIG. 6 is a schematic diagram of a first embodiment of a distance characteristic information measuring apparatus according to an embodiment of the present invention; A schematic diagram of a second embodiment of a measuring device for distance characteristic information of an embodiment. BEST MODE FOR CARRYING OUT THE INVENTION Exemplary embodiments will be described in detail herein, examples of which are illustrated in the accompanying drawings. The following description of the drawings refers to the same or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Instead, they are merely examples of devices and methods consistent with aspects of the invention as detailed in the appended claims.

FIG. 1 is a schematic diagram showing an example of a method for measuring distance feature information and a device according to an embodiment of the present invention. As shown in FIG. 1 , the method and device for measuring distance information in the embodiment of the present invention can be applied to a bus system. In the system, the bus system includes a control node 110, at least one mount node 120, and a bus 130. The control node 110 communicates with each of the mount nodes 120 via a bus 130, and each mount node 120 is mounted on the bus. 130.

Preferably, the bus 130 is preferably continuous and the media is unique to ensure the accuracy of the distance information measurement results of embodiments of the present invention.

The measurement method of the distance feature information of the embodiment of the present invention will be described in more detail on the basis of the above scenario examples.

FIG. 2 is a schematic diagram of a first embodiment of a method for measuring distance feature information according to an embodiment of the present invention, where the method includes:

Step 201: The control node determines a length of time from when the ranging command is sent to the first mount node to the reply message received by the first mount node.

The first mount node in the embodiment of the present invention refers to any one of the at least one mount node mounted on the bus.

Step 202: The control node calculates distance feature information between the control node and the first mount node according to the length of time.

The distance feature information in the embodiment of the present invention may be a parameter capable of expressing physical distance information such as a time length, a distance value, or a proportional value;

The length of time may be the length of time that the control node detects that the information is sent from the control node to the first mount node, for example, 4s, and may also be the first mount from the control node to the control node. The length of time that the node sends information to receive the feedback information of the first mount node, for example, 8s; the distance value may be a physical distance between the control node and the first mount node, for example, 50m;

The ratio value may be a ratio of the length of the current first mount node measured by the control node to the length of the mount node farthest from the control node, for example, 5%, and the proportional value may also be the current measured by the control node. The ratio of the length of the first mount node to the length of the mount node closest to the control node, for example, 3, is not limited in this embodiment of the present invention.

In this embodiment, the control node determines the length of time from the sending of the ranging command to the first mount node to the receipt of the reply message of the first mount node, and calculating the distance between the control node and the first mount node according to the length of time. The feature information, thereby transmitting the message through the bus, realizes the measurement of the distance characteristic information between the control node and the first mount node; the distance feature information measurement method does not need to disconnect the bus, and the implementation is low in difficulty and low in cost. FIG. 3 is a schematic diagram of a second embodiment of a method for measuring distance feature information according to an embodiment of the present invention, where the method includes:

Step 301: The first mount node receives a ranging command sent by the control node.

Step 302: The first mount node sends a ranging command reply message to the control node, so that the control node determines the length of time from the sending of the ranging command to the first mount node to the receipt of the reply message of the first mount node, according to the time. The length calculates the distance characteristic information between the control node and the first mount node.

In this embodiment, the first mount node cooperates with the control node, and after receiving the ranging command sent by the control node, sends a ranging command reply message to the control node, thereby implementing the control node to the control node and the first mount node. Measurement of distance information between features. 4 is a schematic diagram of a third embodiment of a method for measuring distance feature information according to an embodiment of the present invention, where the method includes:

Step 401: The control node sends a ranging preparation command to the first mounting node, where the ranging preparation command is used to instruct the first mounting node to perform ranging preparation.

Step 402: After receiving the ranging preparation command, the first mount node performs a task of scanning the bus and receiving the command to immediately reply, and sending a ranging preparation reply message to the control node, where the ranging preparation reply message is used. The distance measurement preparation of the first mount node of the control node is notified to be completed.

Optionally, for the accuracy of the distance measurement result, the first mount node may stop the execution of other tasks while executing the scan bus and receiving the command to immediately reply to the task.

Generally, after receiving the ranging preparation reply message, the control node needs to determine that there is no other data transmission on the bus, and is in an idle state, so as not to interfere with the determination of the time length of the subsequent control node, and ensure the accuracy of the distance measurement result.

Step 403: The control node starts to listen to whether its own sending port and receiving port have data transmission. The sending port of the control node is used to send data to different mount nodes through the bus; the receiving port of the control node is used to receive data sent to different mount nodes through the bus.

Step 404: The control node sends a ranging command to the first mount node.

Step 405: After receiving the ranging command, the first mount node immediately sends a ranging command reply message to the first mount node.

Step 406: The control node receives the ranging command reply message, and determines a length of time from when the sending port detects the first bit of the ranging command to the receiving port receives the first bit of the reply message. .

Wherein, since the bus has been determined to be in an idle state before performing step 403, the control node The data sent by the sending port that is heard must be a ranging command, and the data received by the receiving port that is heard must be a ranging command reply message. By determining the length of time from the detection of the first bit transmitted by the transmitting port to the end of the receiving of the first bit by the receiving port, the ranging command and the ranging command reply message can be accurately transmitted on the bus. Length of time.

In fact, the length of time includes the processing time of the first mount node receiving the ranging command and the sending the ranging command reply message, but the processing time is extremely small with respect to the length of time, which is ignored in the embodiment of the present invention. Excluding.

In this step, when the control node determines the length of time, it may be implemented by timing, or may be implemented by measuring the number of pulses.

Specifically, when implemented by timing, a timer may be set in the control node, and the first bit of the ranging command sent by the sending port is detected from the control node, and the control node detects the receiving. The port receives the first bit of the reply message and ends timing.

When the number of pulses is measured, a pulse of a certain preset frequency may be preset, and the first bit of the ranging command sent by the sending port is detected from the control node to start counting pulses, to the control node. The first bit ending count of the reply message received by the receiving port is detected.

In the mode of measuring the number of pulses, the accuracy of the distance measurement result can be adjusted by adjusting the frequency of the pulse to adjust the accuracy of the time length. Specifically, the higher the frequency of the pulse, the higher the accuracy of the time length, and the higher the accuracy of the distance measurement result.

Step 407: The control node calculates distance feature information between the control node and the first mount node according to the length of time.

Wherein, the data transmission round-trip time on the bus of the unit distance may be determined in advance, and the control node may calculate the distance characteristic information between the control node and the first mount node by using the following formula:

S=T/t _;

Where S is the distance characteristic information between the control node and the first mount node, T is the time length, and t is the data transmission round-trip time on the bus with a unit distance. Here, the distance feature information calculated by the formula is actually a distance value between the control node and the first mount node.

For example, assuming that the data transmission round-trip time on the bus of lm is 10 ms and the time length T is 500 ms, the distance characteristic information S between the control node and the first mount node is 50 m.

The data transmission round-trip time on the bus of the unit distance can be measured experimentally, and the specific measurement manner is similar to the measurement method of the time length of the embodiment of the present invention, and the difference is only that the length of the measured bus is known in advance before the experiment. Distance, such as lm. In this embodiment, the control node determines the length of time from the sending of the ranging command to the first mount node to the receipt of the reply message of the first mount node, and calculating the distance between the control node and the first mount node according to the length of time. The feature information, thereby transmitting the message through the bus, realizes the measurement of the distance characteristic information between the control node and the first mount node; the distance feature information measurement method does not need to disconnect the bus, and the implementation is low in difficulty and low in cost. FIG. 5 is a schematic diagram of a fourth embodiment of a method for measuring distance feature information according to an embodiment of the present invention, where the method includes:

Steps 501 to 506 are the same as steps 401 to 406, and are not described here.

Step 507: The control node repeatedly executes the preset number of times - 1 step 504 to 506, and obtains a preset number of time lengths.

The specific value of the preset number of times may be set autonomously in an actual application, and is not limited herein. Each step 504 to step 506 is performed, that is, a time length is obtained. In step 507, the preset number of times is performed -1 times, the steps 504 to 506 are added, and the steps 504 to 506 are performed before, and the preset number of times is performed 504. ~ Step 506, correspondingly obtaining a preset number of time lengths.

Step 508: The control node performs filtering processing on the obtained preset number of times of time length;

Optionally, for the preset number of times, the control node may remove the time length in which the value is greater than or equal to the first set threshold and the time length in which the value is less than or equal to the second set threshold, thereby implementing the filtering process. The first set threshold is greater than a second set threshold.

The values of the first set threshold and the second set threshold may be set autonomously in practical applications, for example, the first set threshold may be the maximum length of time, and the second set threshold may be the minimum length of time. . Preferably, the value range between the first set threshold and the second set threshold may be an interval in which the probability of occurrence of the time length is greater than a preset value, which is not limited herein.

For example, the preset time lengths obtained by the control node are: 508ms, 501ms, 498ms, 4 92ms, and 501ms, the first set threshold is 508ms, the second set threshold is 492ms, and the shell lj is removed.

8ms and 492ms, the filtering process is completed, and the filtering results are: 501ms, 498ms and 501ms.

Step 509: The control node performs statistical calculation according to the filtering result to obtain a statistical value of the length of time. The statistical calculation herein may be an arithmetic average calculation, a geometric average calculation, and a calculation method according to the weight coefficient calculation.

Still taking step 508 as an example, the filtering results are 501ms, 498ms, and 501ms, and the average value of the average length of the arithmetic calculation is: (501+498+501) /3=500ms. Step 510: The control node calculates distance feature information between the control node and the first mount node according to a statistical value of a length of time.

S=Ts/t _;

Where S is the distance characteristic information between the control node and the first mount node, Ts is the average value of the time length, and t is the data transmission round-trip time on the bus of the unit distance. Here, the calculated distance feature information S is actually a distance value between the control node and the first mount node.

In this embodiment, the preset number of times steps 504 to 506 are repeatedly performed to obtain a preset number of time lengths, and the preset time lengths are filtered, the average value is calculated, and the average of the time lengths is obtained, and the distance characteristics are obtained. The calculation of the information makes the calculated distance feature information more accurate. 6 is a schematic diagram of a first embodiment of a distance characteristic information measuring apparatus according to an embodiment of the present invention. The apparatus may be applied to a control node in a bus system, where the bus system includes a control node and at least one mount node, and the control The node and the mount node communicate with each other through a bus; as shown in FIG. 6, the apparatus 600 includes: a first determining unit 610, configured to determine to send a ranging command from the first mount node to receive the first a length of time of the reply message of the mounting node; the first mount node is one of the at least one mount node;

The calculating unit 620 is configured to calculate distance feature information between the control node and the first mount node according to the length of time determined by the first determining unit 610.

Optionally, the first determining unit 610 may include:

Determining a subunit, configured to determine a length of time from the first bit of the ranging command sent by the transmitting port to the first bit of the reply message received by the receiving port.

Optionally, the determining subunit may be specifically configured to:

The length of time from the first bit of the ranging command sent by the transmitting port to the first bit of the reply message received by the receiving port is determined by metering the number of pulses. Optionally, the first determining unit 610 is further configured to: repeatedly perform the step of determining the length of time by the preset number of times -1 times, to obtain a preset number of time lengths;

The calculating unit 620 may specifically include:

a filtering subunit, configured to perform filtering processing on the preset number of times obtained by the first determining unit;

An average calculation subunit, configured to perform statistical calculation according to the filtering result, to obtain a statistical value of a length of time; and a distance calculation subunit, configured to calculate the control node and the first mount node according to the statistical value of the length of time Distance information between the features.

Optionally, the filtering subunit may be specifically configured to: remove, for the preset number of times, a length of time in which the value is greater than or equal to the first set threshold, and a length of time in which the value is less than or equal to the second set threshold, The first set threshold is greater than a second set threshold.

Optionally, the device may further include:

The first receiving unit is configured to receive a ranging preparation reply message sent by the first mounting node, where the ranging preparation reply message is used to notify the control node that the ranging preparation of the first mounting node is completed.

In a possible implementation manner, the transceiver subunit and the computing unit may be implemented by a processor in the control node, and the listening subunit and the determining subunit may be implemented by a processor, or may be through a peripheral of the processor. The hardware structure is implemented. For example, if it is determined that the subunit determines the time length by measuring the number of pulses, the listening subunit and the determining subunit may pass a CPLD (Compl Ex Programmable Logic Device, which can communicate with the main processor, Complex programmable logic device (FPGA) or FPGA (Field Programmable Gate Array) implementation, as a peripheral of the processor, through the pre-set protocol communication, accept the control of the processor.

Taking CPLD as an example, the support frequency of CPLD can be higher than that of the processor, but there is no need to replace the higher performance processing by increasing the frequency of the processor, saving resources and power consumption, and when the frequency needs to be improved, there is no need to The original structure is changed, and the scalability is enhanced. Moreover, after the CPLD measures the number of pulses, the number of pulses can be sent to the processor according to a preset data format and a communication protocol, and the processor is assisted to complete the counting of the pulse number. When a narrow pulse echo interference occurs, it will affect the triggering of the determining sub-unit for the initial time measurement of the time length, so that the determined time length is not accurate. At this time, the initial trigger pulse of a certain width can be filtered out by the CPLD to ensure time. Triggering the initial time of the length measurement and the accuracy of the length of time Sex.

Optionally, the distance feature information may specifically be a time length, a distance value, or a proportional value.

In this embodiment, the apparatus determines a length of time from when the ranging command is sent to the first mount node to the reply message of the first mount node, and the distance between the control node and the first mount node is calculated according to the length of time. The feature information, thereby transmitting the message through the bus, realizes the measurement of the distance characteristic information between the control node and the first mount node; the distance feature information measurement method does not need to disconnect the bus, and the implementation is low in difficulty and low in cost. 7 is a schematic diagram of a second embodiment of a distance measuring apparatus according to an embodiment of the present invention. The apparatus may be applied to a mount node in a bus system, where the bus system includes a control node and at least one mount node, and the control node and The mount nodes communicate with each other through a bus; as shown in FIG. 7, the apparatus 700 includes:

a second receiving unit 710, configured to receive a ranging command sent by the control node; the first mounting node is one of the at least one mounting node;

a second sending unit 720, configured to send a ranging command reply message to the control node, so that the control node listens to send a ranging command from the first mount node to receive the reply message of the first mount node. Length of time, calculating distance feature information between the control node and the first mount node according to the length of time.

Optionally, the second receiving unit 710 is further configured to: receive a ranging preparation command sent by the control node, where the ranging preparation command is used to instruct the first mounting node to perform ranging preparation;

The second sending unit 720 is further configured to: after completing the ranging preparation, send a ranging preparation reply message to the control node, where the ranging preparation reply message is used to notify the control node of the first hanging The ranging of the carrier node is ready to be completed.

In this embodiment, the device cooperates with the control node, and after receiving the ranging command sent by the control node, sends a ranging command reply message to the control node, thereby realizing the distance between the control node and the first mounting node. Measurement of feature information. It will be apparent to those skilled in the art that the techniques in the embodiments of the present invention can be implemented by means of software plus a necessary general hardware platform. Based on such understanding, the technical solution in the embodiments of the present invention may be embodied in the form of a software product in essence or in the form of a software product, and the computer software product may be stored in a storage medium such as a ROM/RAM. , a diskette, an optical disk, etc., comprising instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform the methods described in various embodiments of the present invention or in certain portions of the embodiments. The various embodiments in the specification are described in a progressive manner, and the same or similar parts between the various embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the description of the method embodiment.

The embodiments of the present invention described above are not intended to limit the scope of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and scope of the invention are intended to be included within the scope of the invention.

Claims

M ^

A method for measuring distance characteristic information, characterized in that it is applied to a bus system, the bus system includes a control node and at least one mount node, and the control node and the mount node communicate via a bus; The method includes:

The method according to claim 1, wherein the control node determines a length of time from the sending of the ranging command to the first mount node to the receipt of the reply message of the first mount node, including:

The control node sends a ranging command to the first mount node, and receives a reply message of the first mount node for the ranging command;

The control node determines a length of time from the first bit of the ranging command sent by the transmitting port to the first bit of the reply message received by the receiving port.

The method according to claim 2, wherein the determining, from detecting the first bit of the ranging command sent by the sending port to the receiving port, receiving the first message of the reply message The length of the bits, including:

The method according to any one of claims 1 to 3, wherein the control node calculates the distance characteristic information between the control node and the first mount node according to the length of time, Also includes:

The control node repeats the step of determining the length of time by the preset number of times - 1 time, and obtains a preset number of times;

The calculating, by the control node, the distance characteristic information between the control node and the first mount node according to the length of time includes: The control node performs filtering processing on the obtained preset number of times; the control node performs statistical calculation according to the filtering result to obtain a statistical value of the length of time; the control node calculates the statistical value according to the length of time Distance feature information between the control node and the first mount node.

The method according to claim 4, wherein the control node performs filtering processing on the obtained preset number of times of time, including:

For the preset number of times, the control node removes a length of time in which the value is greater than or equal to the first set threshold and a time length in which the value is less than or equal to the second set threshold, the first set threshold is greater than the second Set the threshold.

The method according to any one of claims 1 to 5, wherein the control node determines that a response message is sent from the first mount node to a reply message of the first mount node. Before the length of time, it also includes:

The method according to any one of claims 1 to 6, wherein the distance characteristic information is specifically a time length, a distance value or a proportional value.

The first mount node sends a ranging command reply message to the control node, so that the control node listens to the length of time from sending the ranging command to the first mount node to receiving the reply message of the first mount node. And calculating distance feature information between the control node and the first mount node according to the length of time.

The method according to claim 8, wherein before the receiving, by the first loading node, the ranging command sent by the control node, the method further includes:

The first mount node receives a ranging preparation command sent by the control node, where the ranging preparation command is used to instruct the first mount node to perform ranging preparation; After completing the ranging preparation, the first mounting node sends a ranging preparation reply message to the control node, where the ranging preparation reply message is used to notify the control node of the ranging of the first mounting node. Ready to finish.

10. A measuring device for distance characteristic information, characterized in that it is applied to a control node in a bus system, the bus system comprising a control node and at least one mount node, between the control node and the mount node Communicating via the bus; the device comprises:

The device according to claim 10, wherein the first determining unit comprises: a listening subunit, configured to listen to whether there is data transmission on the sending port and the receiving port;

The device according to claim 11, wherein the determining subunit is specifically configured to: determine, by means of a timing, from detecting the first bit of the ranging command sent by the sending port to the The length of time that the receiving port receives the first bit of the reply message; or

The length of time from the first bit of the ranging command transmitted by the transmitting port to the first bit of the reply message received by the receiving port is determined by metering the number of pulses.

The device according to any one of claims 10 to 12, wherein the first determining unit is further configured to: repeatedly perform the step of determining the length of time by the preset number of times - 1 to obtain a preset The length of time;

The calculation unit specifically includes:

a distance calculation unit, configured to calculate the control node from the statistical value of the length of time Distance characteristic information between the first mount nodes.

The device according to claim 13, wherein the filtering subunit is specifically configured to: remove, for the preset number of times, a length of time in which the value is greater than or equal to the first set threshold, and the value is less than And a length of time equal to the second set threshold, the first set threshold is greater than the second set threshold.

The device according to any one of claims 10 to 14, further comprising: a first sending unit, configured to send a ranging preparation command to the first mounting node, the ranging preparation command And configured to instruct the first mount node to perform ranging preparation;

The apparatus according to any one of claims 10 to 15, wherein the distance characteristic information is specifically a time length, a distance value or a proportional value.

17. A measuring device for distance characteristic information, characterized in that it is applied to a mounting node in a bus system, the bus system comprising a control node and at least one mounting node, the control node and the mounting node Communicating via the bus; the device comprises:

The apparatus according to claim 17, wherein the second receiving unit is further configured to: receive a ranging preparation command sent by the control node, where the ranging preparation command is used to indicate the first mounting The node performs ranging preparation;

The second sending unit is further configured to: after completing the ranging preparation, send a ranging preparation reply message to the control node, where the ranging preparation reply message is used to notify the control node of the first mounting node The ranging is ready to be completed.