A cable bidirectional measurement device based on internet of things

Abstract

The utility model relates to the field of internet of things and cable measurement technology, concretely to a kind of cable two-way measuring device based on internet of things, solve the problem that metering device can only one-way measurement, data dependent wired transmission.Specifically including metering device, revolution sensor, code table and communication module;Metering device is equipped with the metering wheel that cable receives / sends positive and negative rotation, encoder is linked with metering wheel, and the number of revolutions parameter is output by the phase difference of A phase / B phase pulse signal to judge metering wheel positive and negative rotation;Code table receives encoder parameter, and cable receives / sends length data is converted;Communication module is added to the outside of code table, and data is received and wirelessly output by interface.The device realizes cable two-way accurate measurement and data remote real-time transmission, simple structure, easy to popularize, applicable to engineering logging, tunnel inclined shaft construction and other scenes.

Description

Technical Field

[0001] This utility model belongs to the field of Internet of Things and cable measurement technology, specifically relating to a bidirectional cable measurement device based on the Internet of Things. Background Technology

[0002] Existing cable measurement solutions have significant technical limitations: On the one hand, most common meter counters can only perform unidirectional distance measurement, which cannot meet the measurement needs of bidirectional movement scenarios such as cable transmission and reception, and is difficult to adapt to distance measurement scenarios when cables are moving back and forth in engineering. On the other hand, traditional cable measurement devices rely on wired connections for data transmission, lacking the ability to transmit measurement data remotely in real time. In complex environments such as engineering well logging and tunnel shaft construction, wired connections are not only difficult to deploy, but also cannot transmit measurement data to the control terminal in a timely manner, resulting in staff not being able to obtain data in real time, which in turn affects work efficiency and the timeliness of decision-making.

[0003] In view of the above, this utility model is hereby proposed. Utility Model Content

[0004] To address the aforementioned technical problems in the existing technology, this utility model provides a bidirectional cable measurement device based on the Internet of Things. By integrating relevant components and adopting specific technical solutions, it enables bidirectional measurement of cables and wireless transmission of measurement data, thus solving the problems of unidirectional measurement by meter counters and inconvenient data transmission.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows: A bidirectional cable measuring device based on the Internet of Things includes: a meter counter, a rotation sensor, a speedometer, and a communication module; The meter counter is equipped with a meter-counting wheel that rotates in the forward / reverse direction with the cable receiving / transmitting; The rotation sensor detects the motion state of the metering wheel and outputs rotation direction parameters and rotation number parameters; The code reader is connected to and receives the rotation direction parameters and rotation number parameters from the rotation sensor, and outputs the cable transmit / receive status and transmit / receive length data to realize bidirectional cable measurement; The communication module connects to and receives the cable transmit / receive status and transmit / receive length data output by the code table, and outputs them.

[0006] Furthermore, the rotational speed sensor is an encoder, which has an A-phase output terminal, a B-phase output terminal and a Z-phase output terminal, and the output signals of the A-phase output terminal and the B-phase output terminal have a phase difference.

[0007] Furthermore, the encoder is wired as follows: one end of the first wire is connected to the output terminal of phase A, and the other end is used for external wiring; One end of the second conductor is connected to the output terminal of phase B, and the other end is used for external wiring. One end of the third conductor is connected to the Z-phase output terminal, and the other end is used for external wiring. One end of the fourth wire is connected to the negative terminal of the encoder, and the other end is used for external wiring; One end of the fifth wire is connected to the positive terminal of the encoder, and the other end is used for external wiring; the ground terminal of the encoder is not connected to any wire.

[0008] Furthermore, the phase difference between the encoder A-phase pulse signal and the B-phase pulse signal is 1 / 4 ± 1 / 8T.

[0009] Furthermore, the encoder is an OmRON-E6B2-CWZ6C rotary encoder.

[0010] Furthermore, the encoder has a pulse resolution of 360P / R, a power supply voltage of 5-24VDC, and an output mode of NPN open collector output.

[0011] Furthermore, the communication module is provided with a data input terminal and is installed on the outside of the code table, and the data input terminal is connected to the data interaction interface of the code table.

[0012] Furthermore, the communication module is a wireless communication module.

[0013] Furthermore, the data input terminal of the communication module is connected to the data interaction interface of the code table via a wire.

[0014] Furthermore, the data interaction interface of the code table is a 485 interface.

[0015] This invention provides a bidirectional cable measurement device based on the Internet of Things (IoT), solving the problem that traditional meter counters can only measure in one direction and rely on wired transmission for data. Specifically, it includes a meter counter, a rotation sensor, a code meter, and a communication module. The meter counter has a counting wheel that rotates in the forward / reverse direction with the cable transmission / reception. The encoder is linked to the counting wheel, determining the forward / reverse direction of the counting wheel through the phase difference of the A-phase / B-phase pulse signals and outputting the number of rotations. The code meter receives the encoder parameters and converts them into cable transmission / reception length data. The communication module is installed on the outside of the code meter, receiving data through an interface and wirelessly outputting it. This device achieves accurate bidirectional cable measurement and remote real-time data transmission. It has a simple structure, is easy to promote, and is suitable for scenarios such as engineering well logging and tunnel inclined shaft construction. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the bidirectional cable measuring device provided in an embodiment of the present invention.

[0017] Explanation of reference numerals in the attached figures: 1. Active meter counting wheel; 2. Tensioning wheel; 3. Rotation sensor; 4. Speedometer; 5. Communication module. Detailed Implementation

[0018] The technical solution of this utility model will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are not all embodiments of this utility model. All other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0019] It should be noted that, unless otherwise specifically stated, the relative arrangement and numerical expressions of the components and steps described in these embodiments should not be construed as limiting the scope of this utility model.

[0020] The following description of exemplary embodiments is merely illustrative and is not intended to limit the present invention or its application or use in any way. Techniques, methods, and apparatus known to those skilled in the art may not be discussed in detail herein, but where applicable, such techniques, methods, and apparatus should be considered part of this specification.

[0021] Example 1 See Figure 1 This embodiment provides a bidirectional cable measurement device based on the Internet of Things, characterized in that it includes: a meter counter, a rotation sensor 3, a speedometer 4, and a communication module 5; The meter counter uses a dual-wheel structure as its core to measure cables. It consists of an active meter-counting wheel 1 and a tensioning wheel 2. The active meter-counting wheel 1 is in direct contact with the cable and rotates synchronously with the cable's take-up and take-off movements using friction. The wheel body can be made of wear-resistant rubber to enhance friction and prevent slippage, and its circumference is a fixed measurement reference. The tensioning wheel 2 serves as an auxiliary driven wheel and dynamically adjusts the cable tension through a suitable spring or slide groove structure to ensure that the active meter-counting wheel 1 and the cable are always in close contact, preventing cable slack from causing measurement errors. The two wheels together form a cable clamping structure to accommodate bidirectional cable movement.

[0022] The rotation sensor 3 detects the motion state of the counting wheel based on a coaxial rotating shaft. The sensor is rigidly connected to the counting wheel shaft, directly capturing the shaft's rotation speed and direction, and outputting rotation direction and rotation count parameters. The rotation sensor 3 uses an OmRON-E6B2-CWZ6C rotary encoder with a pulse resolution of 360P / R, a power supply voltage of 5-24VDC, and an NPN open-collector output mode with three output signals: A-phase, B-phase, and Z-phase. The encoder is wired as follows: one end of the first wire connects to the A-phase output terminal, and the other end is used for external wiring; one end of the second wire connects to the B-phase output terminal, and the other end is used for external wiring; one end of the third wire connects to the Z-phase output terminal, and the other end is used for external wiring; one end of the fourth wire connects to the encoder's negative terminal, and the other end is used for external wiring; one end of the fifth wire connects to the encoder's positive terminal, and the other end is used for external wiring. The encoder's ground terminal is not connected to any wires, and the encoder is linked to the counting wheel. When the counting wheel rotates, it drives the encoder to rotate synchronously and outputs three pulse signals (A, B, and Z). Typically, the first wire is black, the second wire is white, the third wire is orange, the fourth wire is blue, and the fifth wire is brown.

[0023] The data interaction interface of the code meter 4 is a 485 interface, which can receive the pulse signal output by the encoder and convert the pulse signal into the distance (meters) of the cable movement. Since the encoder can identify the forward and reverse rotation of the cable, the code meter 4 can also realize the distance measurement of the bidirectional movement of the cable. At the same time, the 485 interface of the code meter 4 is also used to transmit data to the communication module 5. Communication module 5 is a wireless communication module, and a LoRa type wireless communication module can be selected. Communication module 5 is equipped with a data input terminal, which is installed on the outside of the code meter 4 (the side away from the meter counter). The data input terminal of communication module 5 is connected to the data interaction interface of code meter 4 through a wire. Code meter 4 receives the pulse signal output by the encoder, converts the pulse signal into the distance of cable movement, and wirelessly transmits the data to the cloud monitoring platform to realize the remote real-time transmission of measurement data.

[0024] The cloud-based monitoring platform is deployed on Alibaba Cloud servers. It receives data from the communication module via a LoRa gateway, stores it in real time to a MySQL database, and displays it on a web interface in the form of dynamic numbers and line graphs. For example, the left side of the interface displays the current cable status (green "transmit" / red "receive") and real-time length (e.g., "128.5m"), while the right side displays the cable length trend over the past hour on a line graph. When the cable length extended in a single instance exceeds 500 meters, the platform automatically triggers an alert, pushes an SMS to the project manager's mobile phone, and displays a pop-up notification on the platform.

[0025] It also includes monitoring terminals that communicate with the cloud monitoring platform, allowing staff to access, view, and manage measurement data. The monitoring terminals include: a computer client in the control center for administrators to operate, allowing them to set warning thresholds (e.g., "single transmit / receive length ≥ 500m") and export last week's logging data to generate Excel reports; a mobile app for on-site construction personnel, which can receive real-time warning SMS messages, view the current cable length (e.g., "498.2m"), and notify the platform to adjust the work pace when the length is close to the threshold; and an industrial touchscreen on the work platform that displays only core measurement data in a concise format (e.g., "current length: 498.2m, status: transmit"), facilitating quick confirmation of the cable's real-time status by on-site operators.

[0026] The A-phase pulse signal output by the OmRON-E6B2-CWZ6C encoder has a fixed phase difference with the B-phase pulse signal, that is, the A-phase leads or delays the B-phase by 1 / 4±1 / 8T (90°±45°). This phase relationship can be used to determine the rotation direction (CW direction and CCW direction), and thus identify whether the cable is rotating forward or backward. Viewed from the encoder shaft side, when the A-phase pulse signal leads the B-phase pulse signal by 1 / 4 ± 1 / 8T, the encoder rotates in the CW direction (clockwise), corresponding to the meter counting wheel rotating forward. At this time, the cable is in the "outgoing" state (cable extended); when the A-phase pulse signal is delayed by 1 / 4 ± 1 / 8T compared to the B-phase pulse signal, the encoder rotates in the CCW direction (leftward), corresponding to the meter counting wheel rotating in reverse. At this time, the cable is in the "retracted" state (cable retracted). The code table 4 uses internal timing detection logic to measure phase difference. Specifically, it synchronously collects the rising and falling edges of the A and B phase pulses, compares their timing relationship to determine whether the A phase is ahead or behind the B phase, thereby completing the identification of the rotation direction (cable transmit / receive status).

[0027] When measuring the cable transmit / receive length, the code meter 4 first accumulates and counts the pulse signals (A phase or B phase) output by the encoder. Combining the characteristic that the encoder outputs 360 pulses per revolution, the number of revolutions of the encoder (and the meter wheel) can be calculated. Then, based on the fixed circumference of the meter wheel (pre-calibrated), the number of revolutions is converted into the distance (meters) of the cable movement, that is, cable transmit / receive length = (cumulative pulse count / 360) × meter wheel circumference. At the same time, the code meter 4 will combine the previously identified cable transmit / receive status and mark the calculated distance as transmit length or receive length respectively, so as to achieve accurate measurement of cable transmit / receive length data.

[0028] Specifically, the working process is as follows: the cable's transmitting and receiving motion drives the measuring wheel of the meter counter to rotate, which in turn drives the OmRON-E6B2-CWZ6C encoder to rotate. After the encoder rotates, it outputs three pulse signals: A, B, and Z. The code meter 4 with a 485 interface receives these pulse signals. On the one hand, it identifies the cable's transmitting / receiving status through the phase relationship of phases A and B, and on the other hand, it converts the pulse signals into cable transmitting / receiving length data. Subsequently, the code meter 4 transmits the cable transmitting / receiving status and transmitting / receiving length data to the added communication module 5 through the 485 interface. The communication module 5 then wirelessly transmits this data, allowing personnel in engineering logging, tunnel inclined shaft construction, and other scenarios to obtain data in real time, ultimately realizing bidirectional cable measurement and remote real-time transmission of measurement data.

[0029] In well logging: This device is installed on the cable connected to the logging probe. When the probe is lowered or raised, the cable drives the meter wheel to rotate, and the encoder outputs a corresponding pulse signal. The speedometer 4 converts the pulse signal into distance and simultaneously calculates the lowering or raising speed. The communication module 5 wirelessly transmits the real-time measured probe position and speed data to a computer, allowing staff to monitor the probe status in real time and easily track the logging progress and situation.

[0030] In tunnel inclined shaft construction: This device is applied to the cable of the work platform. When the work platform moves up and down, the cable's transmission and reception drive the meter counter to work, the encoder encodes, the code meter 4 converts the pulse signal into the position information and movement speed of the work platform, and the communication module 5 transmits this data to the computer in real time, so that the construction personnel can keep track of the position and speed of the work platform in real time, ensuring construction safety and progress.

[0031] In summary, this device features well-selected components, clear connection methods, and a simple overall structure. It ensures the timeliness and accuracy of measurement and data transmission, while also possessing good feasibility and application value. It can provide a stable and reliable technical solution for cable measurement work in related fields.

[0032] The above specific embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A bidirectional cable measurement device based on the Internet of Things, characterized in that, include: Meter counter, speed sensor, speedometer, and communication module; The meter counter is equipped with a meter-counting wheel that rotates in the forward / reverse direction with the cable receiving / transmitting; The rotation sensor detects the motion state of the metering wheel and outputs rotation direction parameters and rotation number parameters; The code reader is connected to and receives the rotation direction parameters and rotation number parameters from the rotation sensor, and outputs the cable transmit / receive status and transmit / receive length data to realize bidirectional cable measurement; The communication module connects to and receives the cable transmit / receive status and transmit / receive length data output by the code table, and outputs them.

2. The Internet of Things based cable two-way measurement device of claim 1, wherein, The rotational speed sensor is an encoder, which has an A-phase output terminal, a B-phase output terminal and a Z-phase output terminal, and the output signals of the A-phase output terminal and the B-phase output terminal have a phase difference.

3. The Internet of Things based cable two-way measurement device of claim 2, wherein, The encoder is wired as follows: one end of the first wire is connected to the output terminal of phase A, and the other end is used for external wiring. One end of the second conductor is connected to the output terminal of phase B, and the other end is used for external wiring. One end of the third conductor is connected to the Z-phase output terminal, and the other end is used for external wiring. One end of the fourth wire is connected to the negative terminal of the encoder, and the other end is used for external wiring; One end of the fifth wire is connected to the positive terminal of the encoder, and the other end is used for external wiring; the ground terminal of the encoder is not connected to any wire.

4. The Internet of Things based cable two-way measurement device of claim 3, wherein, The phase difference between the encoder's A-phase pulse signal and the B-phase pulse signal is 1 / 4 ± 1 / 8T.

5. The IoT based cable bidirectional measurement device as claimed in claim 3, wherein, The encoder is an OmRON-E6B2-CWZ6C rotary encoder.

6. The IoT-based cable bidirectional measurement device of claim 3, wherein, The encoder has a pulse resolution of 360P / R, a power supply voltage of 5-24VDC, and an output mode of NPN open collector output.

7. The IoT-based bidirectional cable measurement device according to claim 1, characterized in that, The communication module is equipped with a data input terminal and is installed on the outside of the code table. The data input terminal is connected to the data interaction interface of the code table.

8. The IoT-based bidirectional cable measurement device according to claim 7, characterized in that, The communication module is a wireless communication module.

9. The IoT-based bidirectional cable measurement device according to claim 7, characterized in that, The data input terminal of the communication module is connected to the data interaction interface of the code table via a wire.

10. The IoT-based bidirectional cable measurement device according to claim 1, characterized in that, The code table uses a 485 interface for data interaction.

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