Low-carbon multi-adaptive lifting capacity limiter

Abstract

The invention discloses a low-carbon multi-adaptive lifting capacity limiter, which can realize self-adaptive switching of sampling channels according to the type of an output signal of an external weighing sensor according to an analog signal processing circuit, and avoids the problem that the sensor needs to be replaced or a signal transmitter needs to be additionally arranged. The load state of the crane is automatically detected under the condition that peripheral equipment is not added, and through the dormancy control circuit, the crane can enter the dormancy state when no load exists continuously and automatically quit dormancy to start weighing when the load exists. According to the invention, in an on-site reconstruction project, on-site sensors can be utilized to the greatest extent, use of intermediate conversion equipment is reduced, and resource consumption in a hardware production process is reduced; an automatic sleep mode is added by using the sleep control circuit, the overall operation power consumption of a product is reduced, and meanwhile the overall service life of electronic elements is prolonged. The manufacturing cost and the equipment operation cost are reduced, and the development trend of low carbon and environmental protection is met.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hoisting machinery safety protection, and in particular to a low-carbon multi-adaptive type load limiter. BACKGROUND

[0002] The load limiter is a safety protection device that must be equipped for hoisting machinery, and the load limiter needs to be used as an information source to collect the load signal for the hoisting machinery equipped with a safety monitoring system. The appendix a of TSG 51-2023 Crane Safety Technical Regulations is modified and requires that the metallurgical bridge crane greater than 10 tons needs to be equipped with a safety monitoring system, resulting in a large number of cranes that need to be supplemented with a safety monitoring system, and also face the upgrading of the load limiter. The load limiter usually uses a weighing sensor installed at the lower end of the bearing seat or the fixed pulley of the crane as a force measuring element. In the upgrading process, the original weighing sensor of the crane will continue to be used, but there are differences between the voltage signals and current signals of the sensors of different manufacturers, and different sampling functions of the load limiter need to be configured for data acquisition. At the same time, the load limiter works for a long time with power on, and the load limiter only needs to accurately monitor the load information when the crane is loaded. However, the actual loading time of the crane accounts for a very small proportion of the system startup time. According to the traditional working mode of the load limiter, on the one hand, long-term power-on will reduce the total element service life of the product, and on the other hand, continuous work when the crane is idle will increase the energy consumption of the product. SUMMARY

[0003] The present application discloses a low-carbon multi-adaptive type load limiter to overcome the above technical problems.

[0004] In order to achieve the above purpose, the technical scheme of the present application is as follows: A low-carbon multi-adaptive type load limiter, comprising: an analog signal processing circuit, an AD conversion chip, a sleep control circuit, a first microcontroller, and a second microcontroller. The input end of the analog signal processing circuit is connected with the weighing sensor, and is used to convert the voltage signal or current signal output by the weighing sensor into a differential voltage signal. The sleep control circuit is connected with the output end of the analog signal processing circuit and the second microcontroller, respectively, so as to compare the differential voltage signal with the no-load reference voltage according to the differential voltage signal and the no-load reference voltage. The two ends of the AD conversion chip are connected with the analog signal processing circuit and the first microcontroller, respectively. The first microcontroller is connected with the sleep control circuit, so as to determine whether to start the first microcontroller according to the comparison result of the differential voltage signal and the no-load reference voltage; and when the first microcontroller is started, the actual load tonnage of the weighing sensor is obtained. The second microcontroller is configured to set the no-load reference voltage.

[0005] Further, the analog signal processing circuit comprises: a transient voltage suppression diode TVS1, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a sampling resistor R7, an eighth resistor R8, a ninth resistor R9, a first voltage follower U1, a voltage comparator U2, a latch U3, a second voltage follower U4, a single-pole double-throw analog switch SPDT1, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, and a fifth capacitor C5. Two ends of the transient voltage suppression diode TVS1 are respectively connected to the positive signal end and the negative signal end of the load cell; one end of the sixth resistor R6 is connected to the negative signal end of the load cell, and the other end is connected to the fourth resistor R4; the other end of the fourth resistor R4 is connected to the 12V terminal; The positive input end of the voltage comparator U2 is connected to the positive signal end of the load cell; the negative input end of the voltage comparator U2 is connected to the connection point of the fourth resistor R4 and the sixth resistor R6; the output end of the voltage comparator U2 is connected to the latch U3; The common end of the single-pole double-throw analog switch SPDT1 is connected to the positive signal end of the load cell; the control end and the normally open end of the single-pole double-throw analog switch SPDT1 are respectively connected to the latch U3 and the sampling resistor R7; the other end of the sampling resistor R7 is connected to the negative signal end of the load cell; One end of the ninth resistor R9 is connected to the negative signal end of the load cell, and the other end is connected to the positive input end of the second voltage follower U4; the two ends of the fifth resistor R5 are respectively connected to the negative input end and the output end of the second voltage follower U4; the third capacitor C3 is connected in parallel with the fifth resistor R5; The two ends of the third resistor R3 are respectively connected to the positive signal end of the load cell and the positive input end of the first voltage follower U1; the two ends of the first resistor R1 are respectively connected to the negative input end and the output end of the first voltage follower U1; the first capacitor C1 is connected in parallel with the first resistor R1; The second capacitor C2, the fourth capacitor C4, and the fifth capacitor C5 are connected in series; the other end of the second capacitor C2 and the other end of the fifth capacitor C5 are grounded; One end of the second resistor R2 is connected to the output end of the first voltage follower U1, and the other end is connected to the connection point of the second capacitor C2 and the fourth capacitor C4; One end of the eighth resistor R8 is connected to the output end of the second voltage follower U4, and the other end is connected to the connection point of the fourth capacitor C4 and the fifth capacitor C5.

[0006] Further, the sleep control circuit comprises an integrated differential operational amplifier U5, a voltage comparator U6, a digital-to-analog conversion chip U7, a tenth resistor R10, and a sixth capacitor C6. The digital-to-analog conversion chip U7 is connected with the second microcontroller and the negative input terminal of the voltage comparator U6 respectively. The integrated differential operational amplifier U5 is connected with the analog signal processing circuit and the positive input terminal of the voltage comparator U6. The output terminal of the voltage comparator U6 is connected with the tenth resistor R10, the other end of the tenth resistor R10 is connected with the first microcontroller and the sixth capacitor C6 respectively, and the other end of the sixth capacitor C6 is grounded.

[0007] Further, the weighing sensor is a weighing sensor outputting a voltage signal or a weighing sensor outputting a current signal.

[0008] Further, the result of comparing the differential voltage signal with the no-load reference voltage includes that the differential voltage signal is greater than the no-load reference voltage signal and that the differential voltage signal is not greater than the no-load reference voltage signal. When the differential voltage signal is greater than the no-load reference voltage signal, the first microcontroller is started; otherwise, when the differential voltage signal is not greater than the no-load reference voltage signal, the first microcontroller is not started.

[0009] Further, the method / formula for obtaining the actual load tonnage of the weighing sensor is as follows:

[0010] In the formula, T is the actual load tonnage of the weighing sensor, T0 is the lifting calibration value issued by the safety monitoring system to the lifting weight limiter under the standard load, T1 is the lifting calibration value issued by the safety monitoring system to the lifting weight limiter under the no-load, V0 is the conversion result of the AD conversion chip under the standard load, V1 is the conversion result of the AD conversion chip under the no-load, V is the conversion result of the AD conversion chip under the actual load, and E is the cumulative error issued by the safety monitoring system to the lifting weight limiter. T is the actual load tonnage of the weighing sensor. T0 is the lifting calibration value issued by the safety monitoring system to the lifting weight limiter under the standard load. T1 is the lifting calibration value issued by the safety monitoring system to the lifting weight limiter under the no-load. V0 is the conversion result of the AD conversion chip under the standard load. V1 is the conversion result of the AD conversion chip under the no-load. V is the conversion result of the AD conversion chip under the actual load. E is the cumulative error issued by the safety monitoring system to the lifting weight limiter.

[0011] Beneficial Effects: This invention provides a low-carbon, multi-adaptive lifting capacity limiter. Based on an analog signal processing circuit, it can adaptively switch sampling channels according to the output signal type of the external weighing sensor, avoiding the need to replace sensors or add signal transmitters. It automatically detects the crane's load status without adding external devices. Through a sleep control circuit, it can enter a sleep state when there is no load and automatically exit sleep mode to start weighing when a load is present. This invention can maximize the use of on-site sensors and reduce the use of intermediate conversion equipment in field modification projects, reducing resource consumption in the hardware production process. By adding an automatic sleep mode through the sleep control circuit, the overall operating power consumption of the product is reduced, while the overall lifespan of electronic components is extended. This invention reduces manufacturing and equipment operating costs, aligning with the trend of low-carbon and environmentally friendly development. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a functional block diagram of the lifting weight limiter of the present invention; Figure 2 This is a schematic diagram of the analog signal processing circuit in an embodiment of the present invention; Figure 3 This is a schematic diagram of the sleep control circuit in an embodiment of the present invention. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0015] This embodiment introduces a low-carbon, multi-adaptive lifting capacity limiter, such as... Figure 1 As shown, the low-carbon multi-adapter lifting capacity limiter of this embodiment adopts a dual microcontroller (MCU) scheme, including: analog signal processing circuit, AD conversion chip, sleep control circuit, first microcontroller, and second microcontroller; The input end of the analog signal processing circuit is connected with the weighing sensor, and is used for converting the voltage signal or the current signal output by the weighing sensor into a differential voltage signal; The weighing sensor is a weighing sensor outputting a voltage signal or a weighing sensor outputting a current signal. The sleep control circuit is connected with the output end of the analog signal processing circuit and the second microcontroller MCU2, so as to compare the differential voltage signal with the no-load reference voltage according to the differential voltage signal and the no-load reference voltage. The two ends of the AD conversion chip are connected with the analog signal processing circuit and the first microcontroller MCU1 respectively. The first microcontroller MCU1 is connected with the sleep control circuit, so as to determine whether to start the first microcontroller according to the comparison result of the differential voltage signal and the no-load reference voltage, and to obtain the actual load tonnage of the weighing sensor when the first microcontroller is started.

[0016] The embodiment acquires the actual load tonnage of the weighing sensor by collecting the signal of the weighing sensor, so as to perform early warning and alarm control.

[0017] The second microcontroller is used for setting the no-load reference voltage and remote communication.

[0018] Specifically, when the MCU1 detects that the load tonnage is empty for a long time, the external interrupt function is automatically started and the sleep mode is entered, and the sleep is exited after the sleep control circuit is triggered.

[0019] Specifically, the main functions of the first microcontroller MCU1 include weighing sensor output signal collection, early warning and alarm control: different types of weighing sensor output signals are uniformly converted into differential voltage signals after being processed by the analog signal processing circuit. The differential voltage signal is connected with the sleep control circuit on one side, and compared with the no-load reference voltage. When the differential voltage signal is greater than the no-load reference voltage, the sleep control circuit triggers the external interrupt pin of the MCU1, so that the MCU1 exits the sleep mode and starts the data sampling of the weighing sensor. On the other side, the differential voltage signal is connected with the 24-bit AD conversion chip. When the external interrupt pin of the MCU1 makes it exit the sleep mode, the MCU1 controls the AD conversion chip to complete the analog-digital conversion through SPI communication, and converts the converted digital signal into actual load tonnage information. Early warning and alarm control are performed according to the actual load tonnage information. In addition, when the MCU1 detects that the load tonnage is empty for a long time, the external interrupt function is automatically started and the sleep mode is entered, and the sleep is exited after the sleep control circuit is triggered.

[0020] Specifically, MCU2 is mainly responsible for reporting the collected load tonnage information via digital communication with other devices in the lifting weight limiter. Simultaneously, it communicates with the DAC chip (U7) in the sleep control circuit via SPI to set the no-load reference voltage. To avoid communication interruptions and delays caused by repeated startups, MCU2 remains operational throughout the lifting weight limiter's operation; its communication function is uninterrupted even when MCU1 enters sleep mode.

[0021] Preferably, such as Figure 2 As shown, the analog signal processing circuit includes: a transient suppression diode TVS1, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a sampling resistor R7, an eighth resistor R8, a ninth resistor R9, a first voltage follower U1, a voltage comparator U2, a latch U3, a second voltage follower U4, a single-pole double-throw analog switch SPDT1, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, and a fifth capacitor C5; The two ends of the transient suppression diode TVS1 are connected to the positive signal terminal and the negative signal terminal of the load cell, respectively; one end of the sixth resistor R6 is connected to the negative signal terminal of the load cell, and the other end is connected to the fourth resistor R4; the other end of R4 is connected to the power supply. The positive input terminal of the voltage comparator U2 is connected to the positive signal terminal of the weighing sensor; the negative input terminal of the voltage comparator U2 is connected to the junction of the fourth resistor R4 and the sixth resistor R6; the output terminal of the voltage comparator U2 is connected to the latch U3. The common terminal of the single-pole double-throw analog switch SPDT1 is connected to the positive signal terminal of the load cell. The control terminal and normally open terminal of the single-pole double-throw analog switch SPDT1 are connected to the latch U3 and the sampling resistor R7, respectively. The other end of the sampling resistor R7 is connected to the negative signal terminal of the load cell. One end of the ninth resistor R9 is connected to the negative signal terminal of the weighing sensor, and the other end is connected to the positive input terminal of the second voltage follower U4; the two ends of the fifth resistor R5 are connected to the negative input terminal and the output terminal of the second voltage follower U4, respectively; the third capacitor C3 is connected in parallel with the fifth resistor R5. The two ends of the third resistor R3 are connected to the positive signal terminal of the weighing sensor and the positive input terminal of the first voltage follower U1, respectively; the two ends of the first resistor R1 are connected to the negative input terminal and the output terminal of the first voltage follower U1, respectively; the first capacitor C1 is connected in parallel with the first resistor R1. The second capacitor C2, the fourth capacitor C4, and the fifth capacitor C5 are connected in series; the other end of the second capacitor C2 and the other end of the fifth capacitor C5 are grounded. One end of the second resistor R2 is connected to the output terminal of the first voltage follower U1, and the other end is connected to the connection point of the second capacitor C2 and the fourth capacitor C4; One end of the eighth resistor R8 is connected to the output terminal of the second voltage follower U4, and the other end is connected to the connection point of the fourth capacitor C4 and the fifth capacitor C5.

[0022] Specifically, the two sides of the fourth capacitor C4 are the positive and negative output terminals of the differential voltage signal, respectively.

[0023] Specifically, the analog signal processing circuit's inputs Signal+ and Signal- are connected to the positive and negative signal terminals of the load cell, respectively, enabling it to convert the outputs of different types of load cells into differential voltage signals. After the lifting capacity limiter is activated, the load cell, whose output signal is a voltage signal, generates a voltage of less than or equal to 5V between Signal+ and Signal-. The voltage comparator U2 maintains a low output level, and the latch U3 does not detect a voltage rise and outputs a low level to the SPDT1 single-pole double-throw analog switch. The SPDT1 single-pole double-throw analog switch controls the sampling resistor R7 to remain disconnected from Signal+, maintaining the high input impedance of the analog signal processing circuit and not changing the magnitude of the original output voltage signal of the load cell, i.e., the differential voltage signal, for use by the subsequent sampling circuit. After the lifting capacity limiter is activated, the load cell, whose output signal is a current signal, experiences a voltage rise between Signal+ and Signal- because the sampling resistor R7 is not connected between Signal+ and Signal-. When the voltage between Signal+ and Signal- exceeds 7V, the output of voltage comparator U2 changes from low to high. Latch U3 detects the rising edge of the voltage and outputs a high level to SPDT1 single-pole double-throw analog switch. SPDT1 controls the sampling resistor R7 to be connected in parallel between Signal+ and Signal-, reducing the input impedance of the analog signal processing circuit. This allows the circuit to maintain the original output current signal of the load cell and convert it into a voltage signal for subsequent sampling circuits. Voltage followers U1 and U4 provide impedance matching. R2, R8, C2, C4, and C5 form a low-pass filter circuit. The voltage between Signal+ and Signal- is converted into voltage signals Vout+ and Vout- after low-pass filtering, i.e., differential voltage signals, which then enter the AD conversion chip.

[0024] Preferably, the sleep control circuit includes: an integrated differential operational amplifier U5, a voltage comparator U6, a digital-to-analog converter chip U7, a tenth resistor R10, and a sixth capacitor C6; The digital-to-analog converter chip U7 is connected to the negative input terminals of the second microcontroller and the voltage comparator U6, respectively. The integrated differential operational amplifier U5 is connected to the positive input terminal of the analog signal processing circuit and the voltage comparator U6; The output terminal of the voltage comparator U6 is connected to the tenth resistor R10. The other end of the tenth resistor R10 is connected to the first microcontroller and the sixth capacitor C6. The other end of the sixth capacitor C6 is grounded.

[0025] Specifically, the sleep control circuit, such as Figure 3 As shown. U5 is an integrated differential operational amplifier that converts the input differential voltage signals Vout+ and Vout- into single-ended voltage signals, which are output from the VOUT pin. The VOUT pin is connected to the non-inverting input of voltage comparator U6. U7 is a digital-to-analog converter (DAC) chip. MCU2 controls the output voltage of the OUT pin of DAC chip U7 via the SPI bus. The OUT pin is connected to the inverting input of voltage comparator U6. The input pin of voltage comparator U6 is connected to the TIM2CH1 input capture pin of MCU1 after passing through a low-pass filter composed of R10 and C6. When the voltage at the non-inverting input of U6 is greater than the voltage at the inverting input, MCU1_TIM2CH1 is high; when the voltage at the non-inverting input of U6 is less than the voltage at the inverting input, MCU1_TIM2CH1 is low.

[0026] Specifically, MCU2 reads the voltage between Vout+ and Vout- from the analog signal processing circuit when the crane load is 1% of the rated load, as collected by MCU1, and records it as V_noload. MCU2 sets the output voltage of U7 (digital-to-analog converter chip) to V_noload through the sleep controller circuit. When the crane is unloaded, the voltage between Vout+ and Vout- is less than V_noload, and MCU1_TIM2CH1 is low. When the crane load is greater than 1% of the rated load, the voltage between Vout+ and Vout- is greater than V_noload, and MCU1_TIM2CH1 is high. MCU1 activates the external interrupt of TIM2CH1 and enters sleep mode during prolonged unloaded conditions. If the crane load changes from unloaded to greater than 1% of the rated load, it will trigger the external interrupt of MCU1, exit sleep mode, and start data sampling from the load cell.

[0027] Preferably, the method / formula for obtaining the actual load tonnage of the weighing sensor is as follows:

[0028] In the formula: This represents the actual load capacity (in tons) of the weighing sensor. The lifting calibration value issued by the safety monitoring system to the lifting capacity limiter under standard load; This refers to the lifting calibration value issued by the safety monitoring system to the lifting capacity limiter when the load is unloaded. The conversion result of the AD conversion chip under standard load; This represents the conversion result of the AD converter chip under no-load conditions. This represents the conversion result of the AD conversion chip under actual load. The safety monitoring system sends the cumulative error to the lifting weight limiter.

[0029] This embodiment of a low-carbon, multi-adaptive lifting capacity limiter enables adaptive sampling of weighing sensors with voltage or current outputs and features an automatic sleep function based on continuous no-load signals. According to the analog signal processing circuit, it can adaptively switch sampling channels based on the output signal type of the external weighing sensor, avoiding the need to replace sensors or add signal transmitters. It automatically detects the crane's load status without adding external devices. Through the sleep control circuit, it enters sleep mode when there is no load and automatically exits sleep mode to begin weighing when a load is present. This embodiment maximizes the use of on-site sensors and reduces the use of intermediate conversion equipment in field modification projects, reducing resource consumption during hardware production. By adding an automatic sleep mode through the sleep control circuit, the overall operating power consumption of the product is reduced, achieving an 80% reduction compared to lifting capacity limiters without sleep functionality, while also extending the overall lifespan of electronic components. This embodiment reduces manufacturing and equipment operating costs, aligning with the trend of low-carbon and environmentally friendly development.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A low-carbon multi-adaptive lifting weight limiter, characterized in that, The application relates to a weighing sensor signal processing circuit. The weighing sensor signal processing circuit comprises an analog signal processing circuit, an AD conversion chip, a sleep control circuit, a first microcontroller and a second microcontroller. The input end of the analog signal processing circuit is connected with a weighing sensor, and the analog signal processing circuit is used for converting a voltage signal or a current signal output by the weighing sensor into a differential voltage signal. The sleep control circuit is connected with the output end of the analog signal processing circuit and the second microcontroller, and the sleep control circuit is used for comparing the differential voltage signal with a no-load reference voltage according to the differential voltage signal and the no-load reference voltage. The two ends of the AD conversion chip are connected with the analog signal processing circuit and the first microcontroller. The first microcontroller is connected with the sleep control circuit, and the first microcontroller is used for determining whether to start the first microcontroller according to the comparison result of the differential voltage signal and the no-load reference voltage. The actual load tonnage of the weighing sensor is obtained when the first microcontroller is started. The second microcontroller is used for setting the no-load reference voltage.

2. The low-carbon multi-adaptive load limiter according to claim 1, characterized in that, The analog signal processing circuit comprises a transient voltage suppression diode TVS1, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a sampling resistor R7, an eighth resistor R8, a ninth resistor R9, a first voltage follower U1, a voltage comparator U2, a latch U3, a second voltage follower U4, a single-pole double-throw analog switch SPDT1, a first capacitor C1, a second capacitor C2, a third capacitor C3 and a fourth capacitor C4. The two ends of the transient voltage suppression diode TVS1 are connected with the positive signal end and the negative signal end of the weighing sensor. The positive input end of the voltage comparator U2 is connected with the positive signal end of the weighing sensor. The common end of the single-pole double-throw analog switch SPDT1 is connected with the positive signal end of the weighing sensor. The other end of the ninth resistor R9 is connected with the negative signal end of the weighing sensor. The two ends of the third resistor R3 are connected with the positive signal end of the weighing sensor and the positive input end of the first voltage follower U1. The two ends of the first resistor R1 are connected with the negative input end and the output end of the first voltage follower U1. The first capacitor C1 is connected with the first resistor R1 in parallel. The second capacitor C2, the fourth capacitor C4 and the fifth capacitor C5 are connected in series. One end of the second resistor R2 is connected to the output end of the first voltage follower U1, and the other end is connected to the connection point of the second capacitor C2 and the fourth capacitor C4. One end of the eighth resistor R8 is connected to the output end of the second voltage follower U4, and the other end is connected to the connection point of the fourth capacitor C4 and the fifth capacitor C5.

3. The low-carbon multi-adaptive load limiter according to claim 1, characterized in that, The sleep control circuit comprises an integrated differential operational amplifier U5, a voltage comparator U6, a digital-to-analog conversion chip U7, a tenth resistor R10 and a sixth capacitor C6. The digital-to-analog conversion chip U7 is connected to the second microcontroller and the negative input end of the voltage comparator U6 respectively. The integrated differential operational amplifier U5 is connected to the analog signal processing circuit and the positive input end of the voltage comparator U6. The output end of the voltage comparator U6 is connected to the tenth resistor R10, the other end of the tenth resistor R10 is connected to the first microcontroller and the sixth capacitor C6 respectively, and the other end of the sixth capacitor C6 is grounded.

4. The low-carbon multi-adaptive load limiter according to claim 1, characterized in that, The weighing sensor is a weighing sensor outputting a voltage signal or a weighing sensor outputting a current signal.

5. The low-carbon multi-adaptive load limiter according to claim 1, characterized in that, The comparison result of the differential voltage signal and the no-load reference voltage includes that the differential voltage signal is greater than the no-load reference voltage signal and that the differential voltage signal is not greater than the no-load reference voltage signal. When the differential voltage signal is greater than the no-load reference voltage signal, the first microcontroller is started. Otherwise, when the differential voltage signal is not greater than the no-load reference voltage signal, the first microcontroller is not started.

6. The low-carbon multi-adaptive load limiter according to claim 1, characterized in that, The method / formula for obtaining the actual load tonnage of the weighing sensor is as follows: In the formula: is the actual load tonnage of the load cell; is the lifting calibration value issued by the safety monitoring system to the lifting weight limiter under standard load; is the lifting calibration value issued by the safety monitoring system to the lifting weight limiter under empty load; is the conversion result of the AD conversion chip under standard load; is the conversion result of the AD conversion chip under empty load; is the conversion result of the AD conversion chip under actual load; is the cumulative error issued by the safety monitoring system to the lifting weight limiter.

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