Differential communication and power supply collinear system and control method
Through the differential communication and power supply co-line system, the problem of battery power supply in extreme temperatures or high power consumption scenarios is solved, and the equipment is charged without communication gaps is realized, which reduces operation and maintenance costs, reduces waste, and improves reliability and battery life.
Patent Information
- Application Number
- CN202510670255.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-23
- Publication Date
- 2025-08-05
AI Technical Summary
In the prior art, the equipment is powered by a battery in extreme temperature or high power consumption scenarios, resulting in a shortening of the battery life, requiring frequent replacement, increasing long-term operation and maintenance costs, and is not suitable for all environments, especially in situations where the wireless frequency domain is tight or requires silence.
Differential communication and power supply co-linear system is adopted, and differential voltage is monitored through differential lines and split devices, voltage monitoring components are used to monitor differential voltages, combined with control units, switching units and energy storage units, to realize the charging of the equipment without communication gaps, and to use capacitors and batteries to jointly supply power.
It reduces the operation and maintenance costs of terminal equipment, reduces the frequency of battery replacement, reduces waste generation, improves reliability, prevents data loss caused by sudden power outages, and realizes real-time monitoring and early warning of battery health status.
Smart Images
Figure CN120434273A_ABST
Abstract
Description
Technical field
[0001] The present invention relates to the field of digital communication and automation technology, and in particular to a differential communication and power supply co-line system and a control method. [Background Technology]
[0002] Wired communication is still necessary for data reporting (collection) of neuron distributed sensors in many situations, especially when the wireless frequency domain is tight or requires silence.
[0003] In addition to traditional battery power supply, the device can also be powered by environmental energy such as vibration, temperature difference, and solar energy to reduce battery dependence.
[0004] Considering the environment and price cost, it is not applicable in every occasion.
[0005] In the prior art, even gas and water meters for civilian use, or various meters at oil wellheads in the industrial field, are now mostly powered by batteries.
[0006] This power supply method may shorten battery life in extreme temperature or high power consumption scenarios, requiring regular replacement and increasing long-term operation and maintenance costs. [Summary of the invention]
[0007] In order to overcome the above problems, the present invention proposes a differential communication and power supply co-line system and control method that can effectively solve the above problems.
[0008] The present invention provides a technical solution to solve the above-mentioned technical problems: providing a differential communication and power supply common line system and control method, including a pair of differential lines and a shunt device, the pair of differential lines and the shunt device are connected; the pair of differential lines include a differential transmission line A and a differential transmission line B, the differential transmission line A and the differential transmission line B are connected to a voltage monitoring element, and the voltage monitoring element is used to monitor the differential voltage of the differential transmission line A and the differential transmission line B; the shunt device includes a control unit, a switch unit and an energy storage unit, the switch unit and the energy storage unit are respectively connected to the control unit, and the energy storage unit is connected to the pair of differential lines through the switch unit.
[0009] Preferably, the energy storage unit is a battery BBT1, and the switch unit includes a switch K1, a switch K2, a switch K3, a switch K4, a switch K5, and a switch K6. One end of the battery BBT1 is connected to the switch K1 through a cable, one end of the differential transmission line A is connected to the switch K2, and one end of the differential transmission line B is connected to the switch K6.
[0010] The differential communication and power supply co-linear system also includes a capacitor CC1 and a capacitor CC2, one end of the capacitor CC1 is connected to the switch K4 and the switch K5 respectively, the other end of the capacitor CC1 is connected to the switch K2 and the switch K3 through the resistor R1, one end of the capacitor CC2 is connected to the switch K1 and the switch K4 respectively, and the other end of the capacitor CC2 and one end of the battery BBT1 are commonly grounded.
[0011] Preferably, when the differential voltage of differential transmission line A and differential transmission line B is higher than 0.7 volts, the main direction differential line outputs a maximum of 20mA, and the maximum voltage difference between the two lines is 5V. When the voltage of lines AB is higher than 0.7 volts for 0.5s, the slave starts the power-taking mode to charge the energy storage unit.
[0012] Preferably, when the differential voltage between differential transmission line A and differential transmission line B is lower than 0.2 volts, the master immediately stops supplying power to the differential line, allowing the differential line to communicate with a light load, and the slave immediately stops drawing power from the differential line when the voltage difference between the AB differential lines is lower than 0.7 volts.
[0013] Preferably, when the differential voltage of differential transmission line A and differential transmission line B recovers to above 0.7 volts and lasts for 0.5s, the master continues to provide power with a maximum voltage difference of 5V and a maximum current of 20mA on the AB line, and the slave resumes power supply after the AB differential voltage is above 0.7 volts for 0.4s.
[0014] A differential communication and power supply co-line control method comprises the following steps:
[0015] Step S1: Both switches are closed, differential transmission line A and differential transmission line B are in communication state, and the system is not powered.
[0016] Step S2: switch K1 is closed, and battery BBT1 charges capacitor CC2; switches K2, K5, and K6 are closed to charge capacitor CC1, and the system enters the pre-power state;
[0017] Step S3: Release switches K1, K2, K5, and K6, and the system enters a pre-charging state.
[0018] Step S4, closing switches K3 and K4, and the voltage of capacitor CC1 is superimposed on capacitor CC2 to charge battery BBT1;
[0019] Step S5, release switch K3 and switch K4, and return to the state of step S1;
[0020] In step S6, steps S1 to S5 are repeated repeatedly to extract energy from the differential transmission line A and the differential transmission line B to charge the battery BBT1.
[0021] Compared with the existing technology, the differential communication and power supply co-line system and control method of the present invention can eliminate the need to design special power supply lines for terminal devices, and can charge the energy storage unit of the device during the non-communication intervals, thereby reducing costs, eliminating the need for frequent battery replacement, and reducing long-term operation and maintenance expenses; batteries can be recycled, reducing waste generation, and achieving environmental benefits; data loss caused by sudden power outages (such as emergency power supply for industrial instruments) can be prevented, and reliability is improved; it is conducive to real-time monitoring of battery health status and early warning of aging or abnormalities (such as uploading power data via RS485).
Brief Description of the Drawings
[0022] Figure 1 Schematic diagram of the principle topology of the differential communication and power supply co-line system of the present invention;
[0023] Figure 2 This is a circuit diagram of a specific embodiment of the differential communication and power supply co-line system of the present invention;
[0024] Figure 3 This is a flow chart of the differential communication and power supply co-line control method of the present invention. [Specific implementation method]
[0025] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and implementation examples. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.
[0026] It should be noted that in the embodiment of the present invention, all directional indications (such as up, down, left, right, front, back, etc.) are limited to relative positions on the specified view, rather than absolute positions.
[0027] In addition, the terms "first," "second," and so on, used in this disclosure are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referenced. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this disclosure, "plurality" means at least two, such as two or three, unless otherwise specifically defined.
[0028] See also Figure 1 and Figure 2 The differential communication and power supply co-line system of the present invention includes a pair of differential lines and a shunt device, and the pair of differential lines and the shunt device are connected.
[0029] The pair of differential lines includes a differential transmission line A and a differential transmission line B. The differential transmission line A and the differential transmission line B are connected to a voltage monitoring element, and the voltage monitoring element is used to monitor the differential voltage of the differential transmission line A and the differential transmission line B.
[0030] The branching device includes a control unit, a switch unit and an energy storage unit. The switch unit and the energy storage unit are respectively connected to the control unit. The energy storage unit is connected to a pair of differential lines through the switch unit.
[0031] The branching device may be a gas or water meter for civilian use, or various meters at oil wellheads in the industrial field, or one of low-power consumption sensors.
[0032] When the differential voltage between differential transmission lines A and B exceeds 0.7 volts, the master direction differential line outputs a maximum of 20 mA, with a maximum voltage difference of 5 V. If the voltage between lines A and B remains above 0.7 volts for approximately 0.5 seconds, the slave initiates "power draw" mode to charge the energy storage unit, which can be a supercapacitor or battery BBT1.
[0033] When the differential voltage between differential transmission line A and differential transmission line B falls below 0.2 volts, the master immediately stops supplying power to the differential line, allowing the differential line to communicate with a light load. When the voltage difference between the AB differential lines falls below 0.7 volts, the slave immediately stops drawing power from the differential line.
[0034] When the differential voltage of differential transmission line A and differential transmission line B recovers to be higher than 0.7 volts and lasts for 0.5s, the master continues to provide power with a maximum voltage difference of 5V and a maximum current of 20mA on the AB line. After the slave considers the AB differential voltage to be higher than 0.7 volts for 0.4s, it resumes "taking power".
[0035] The switch unit includes switches K1, K2, K3, K4, K5, and K6. One end of the battery BBT1 is connected to the switch K1 via a cable, one end of the differential transmission line A is connected to the switch K2, and one end of the differential transmission line B is connected to the switch K6.
[0036] The differential communication and power supply co-linear system also includes a capacitor CC1 and a capacitor CC2, one end of the capacitor CC1 is connected to the switch K4 and the switch K5 respectively, the other end of the capacitor CC1 is connected to the switch K2 and the switch K3 through the resistor R1, one end of the capacitor CC2 is connected to the switch K1 and the switch K4 respectively, and the other end of the capacitor CC2 and one end of the battery BBT1 are commonly grounded.
[0037] The differential communication and power supply co-line control method of the present invention comprises the following steps:
[0038] In step S1 , the switches are not closed, the differential transmission line A and the differential transmission line B are in communication state, and the system is not powered.
[0039] In step S2, the switch K1 is closed, and the battery BBT1 charges the capacitor CC2; the switches K2, K5, and K6 are closed to charge the capacitor CC1, and the system enters the pre-power state.
[0040] Step S3: Release the switches K1, K2, K5, and K6, and the system enters a pre-charging state.
[0041] Step S4, closing the switch K3 and the switch K4, the voltage of the capacitor CC1 is superimposed on the capacitor CC2 to charge the battery BBT1.
[0042] Step S5: Release the switches K3 and K4, and return to the state of step S1.
[0043] In step S6, steps S1 to S5 are repeated repeatedly to extract energy from the differential transmission line A and the differential transmission line B to charge the battery BBT1.
[0044] See also Figure 3 , the differential communication and power supply co-line system and control method of the present invention are further illustrated below through specific embodiments.
[0045] U1A is responsible for monitoring the voltage across LA and LB. When LA is more than 0.7V higher than LB, U1A outputs a high level.
[0046] U1B monitors the voltage of LA to see if it's above 2.5V. When it's above 2.5V (U2's operating power supply voltage must be above 2.5V), U1B's output is low. U1A and U1B are LM358 general-purpose dual-channel operational amplifiers, which are voltage monitoring components.
[0047] When U1A output is high and U1B output is low: Q4 is turned on and the output is high.
[0048] When Q4 is on, Q2 and Q5 are on, and the 5mA constant current source formed by Q1 and Q3 operates, powering U2. U2's pin 4 is high, enabling it to be effective. U2 is a booster, and when the output voltage is below 4.1V, it operates to charge battery BT1.
[0049] The delay switch R8, D2, and C3 are completed to prevent the continuous "1" during communication and the charging and pulling down the level.
[0050] Compared with the existing technology, the differential communication and power supply co-line system and control method of the present invention can eliminate the need to design special power supply lines for terminal devices, and can charge the energy storage unit of the device during the non-communication intervals, thereby reducing costs, eliminating the need for frequent battery replacement, and reducing long-term operation and maintenance expenses; batteries can be recycled, reducing waste generation, and achieving environmental benefits; data loss caused by sudden power outages (such as emergency power supply for industrial instruments) can be prevented, and reliability is improved; it is conducive to real-time monitoring of battery health status and early warning of aging or abnormalities (such as uploading power data via RS485).
[0051] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any modifications, equivalent replacements and improvements made within the concept of the present invention should be included in the patent protection scope of the present invention.
Claims
1. A differential communication and power supply co-line system, characterized in that: The invention comprises a pair of differential lines and a shunt device, wherein the pair of differential lines and the shunt device are connected; The pair of differential lines includes a differential transmission line A and a differential transmission line B, wherein the differential transmission line A and the differential transmission line B are connected to a voltage monitoring element, and the voltage monitoring element is used to monitor the differential voltage of the differential transmission line A and the differential transmission line B; The branching device includes a control unit, a switch unit and an energy storage unit. The switch unit and the energy storage unit are respectively connected to the control unit. The energy storage unit is connected to a pair of differential lines through the switch unit.
2. The differential communication and power supply co-line system according to claim 1, wherein: The energy storage unit is a battery BBT1, and the switch unit includes a switch K1, a switch K2, a switch K3, a switch K4, a switch K5, and a switch K6. One end of the battery BBT1 is connected to the switch K1 through a cable, one end of the differential transmission line A is connected to the switch K2, and one end of the differential transmission line B is connected to the switch K6. The differential communication and power supply co-linear system also includes a capacitor CC1 and a capacitor CC2, one end of the capacitor CC1 is connected to the switch K4 and the switch K5 respectively, the other end of the capacitor CC1 is connected to the switch K2 and the switch K3 through the resistor R1, one end of the capacitor CC2 is connected to the switch K1 and the switch K4 respectively, and the other end of the capacitor CC2 and one end of the battery BBT1 are commonly grounded.
3. The differential communication and power supply co-line system according to claim 2, wherein: When the differential voltage between differential transmission line A and differential transmission line B is higher than 0.7 volts, the master direction differential line outputs a maximum of 20mA, and the maximum voltage difference between the two lines is 5V. When the slave side considers the voltage between lines AB to be higher than 0.7 volts for 0.5s, the power-taking mode is activated to charge the energy storage unit.
4. The differential communication and power supply co-line system according to claim 3, wherein: When the differential voltage between differential transmission line A and differential transmission line B falls below 0.2 volts, the master immediately stops supplying power to the differential line, allowing the differential line to communicate with a light load. When the voltage difference between the AB differential lines falls below 0.7 volts, the slave immediately stops drawing power from the differential line.
5. The differential communication and power supply co-line system according to claim 4, wherein: When the differential voltage of differential transmission line A and differential transmission line B recovers to be higher than 0.7V and lasts for 0.5s, the master continues to provide power with a maximum voltage difference of 5V and a maximum current of 20mA on the AB line. The slave resumes power after the AB differential voltage is higher than 0.7V for 0.4s.
6. A differential communication and power supply co-line control method, characterized in that: The steps include: Step S1: Both switches are closed, differential transmission line A and differential transmission line B are in communication state, and the system is not powered. Step S2: switch K1 is closed, and battery BBT1 charges capacitor CC2; switches K2, K5, and K6 are closed to charge capacitor CC1, and the system enters the pre-power state; Step S3: Release switches K1, K2, K5, and K6, and the system enters a pre-charging state. Step S4, closing switches K3 and K4, and the voltage of capacitor CC1 is superimposed on capacitor CC2 to charge battery BBT1; Step S5, release switch K3 and switch K4, and return to the state of step S1; In step S6, steps S1 to S5 are repeated repeatedly to extract energy from the differential transmission line A and the differential transmission line B to charge the battery BBT1.