Anti-fracture alarm circuit of metering scale sensor

Abstract

The utility model relates to an anti-fracture alarm circuit for a metering scale sensor, and relates to the technical field of metering scale sensor protection devices. The device comprises a proximity switch, a first contactor KM1, a second contactor KM2, a power switcher PE and an alarm H, the proximity switch is arranged near the meter sensor support, when the meter sensor is broken, the proximity switch is triggered, and through linkage of the first contactor and the second contactor, it is ensured that the alarm is rapidly lightened when the sensor is broken. The application has the effects of monitoring the state of the metering scale sensor in real time and giving an alarm in time.

Description

Technical Field

[0001] This application relates to the technical field of protection devices for weighing sensors, and in particular to an alarm circuit for preventing breakage of weighing sensors. Background Technology

[0002] Weighing sensors are widely used in industrial production processes, especially in concrete mixing plants, to accurately measure the weight of various materials. The accuracy and stability of these sensors directly affect product quality and production efficiency. However, in actual use, due to prolonged exposure to heavy loads or external impacts, sensors may break, leading to distorted measurement data or even equipment downtime, causing economic losses to enterprises.

[0003] To address this issue, existing technologies typically employ various methods to detect and prevent sensor breakage. For example, some systems rely on regular manual inspections, with maintenance personnel periodically checking and recording the sensor's operational status. Another common method utilizes vibration monitoring devices to monitor sensor vibration during operation and provide early warnings of potential malfunctions. Additionally, some systems employ temperature sensors to indirectly determine sensor malfunction by monitoring changes in the ambient temperature surrounding the sensor. While these methods can reduce the risk of sensor breakage to some extent, they generally suffer from slow response times and the inability to achieve real-time monitoring. Particularly in industrial settings requiring continuous production, undetected sensor breakage can lead to serious consequences, such as production line shutdowns and product defects. Utility Model Content

[0004] In order to monitor the status of the weighing sensor in real time and issue an alarm in a timely manner, this application provides a weighing sensor anti-breakage alarm circuit.

[0005] The anti-breakage alarm circuit for a weighing sensor provided in this application adopts the following technical solution:

[0006] A metering sensor anti-breakage alarm circuit includes a proximity switch, a first contactor KM1, a second contactor KM2, a power switch PE, and an alarm H; the proximity switch is located near the metering sensor support, and is triggered when the metering sensor breaks.

[0007] The L terminal of the AC power supply is electrically connected to pin 1 of the power switch PE, and the N terminal of the AC power supply is electrically connected to pin 2 of the power switch PE; the positive terminal of the proximity switch is electrically connected to pin 3 of the power switch PE, and the negative terminal of the proximity switch is electrically connected to pin 4 of the power switch PE; the S terminal of the proximity switch is electrically connected to pin A2 of the first contactor KM1, and pin A1 of the first contactor KM1 is electrically connected to pin 4 of the power switch PE; pin A3 of the first contactor KM1 is electrically connected to pin 1 of the power switch PE, pin A4 of the first contactor KM1 is electrically connected to pin A1 of the second contactor KM2, and pin A2 of the second contactor KM2 is electrically connected to pin 2 of the power switch PE; pin A3 of the second contactor KM2 is electrically connected to pin 1 of the power switch PE, pin A4 of the second contactor KM2 is electrically connected to one end of the alarm H, and the other end of the alarm H is electrically connected to pin A2 of the second contactor KM2.

[0008] By adopting the above technical solution, a proximity switch is placed near the meter sensor support to monitor the sensor's status. If the meter sensor breaks, the proximity switch is triggered, connecting its S terminal to the A2 terminal of the first contactor KM1, thus triggering KM1, which in turn triggers the second contactor KM2, ultimately activating the alarm H. Furthermore, AC power is supplied to the entire circuit via a power switch PE, ensuring normal circuit operation. The power switch PE distributes and manages power, providing appropriate power connections to different components.

[0009] Preferably, the system also includes a switch QS, wherein the L terminal of the AC power supply is electrically connected to pin 1 of the switch QS, and pin 2 of the switch QS is electrically connected to pin 1 of the power switch PE; the N terminal of the AC power supply is electrically connected to pin 3 of the switch QS, and pin 4 of the switch QS is electrically connected to pin 2 of the power switch PE.

[0010] By adopting the above technical solution, the switch QS provides control over the power supply of the entire circuit. When switch QS is open, AC power can be connected to the power switch PE through it to supply power to the entire circuit. When switch QS is closed, the power supply to the circuit can be cut off, facilitating maintenance and repair of the entire circuit, or disabling the alarm circuit when it is not needed, thus enhancing the convenience and safety of circuit operation.

[0011] Preferably, the switch QS is a manually operated switch.

[0012] By adopting the above technical solution, the manual operation switch QS allows operators to flexibly control the activation and deactivation of the entire alarm device. Specifically, when it is necessary to enable or disable the device, simply manually close or open the switch QS.

[0013] Preferably, the proximity switch is a three-phase PNP type proximity switch.

[0014] By adopting the above technical solutions, three-phase PNP proximity switches typically have high stability and reliability, can adapt to complex industrial environments, and ensure that the proximity switches work stably in the working environment of the weighing scale and accurately monitor the status of the sensor.

[0015] Preferably, the alarm H is an LED light.

[0016] By adopting the above technical solution, LED lights have the advantages of low power consumption, long lifespan, and high brightness, ensuring that the alarm can work stably for a long time and can clearly display the alarm signal when the alarm is triggered.

[0017] Preferably, the alarm H is red.

[0018] By adopting the above technical solutions, the alarm becomes more conspicuous when triggered, making it easier for maintenance personnel to quickly identify and respond, thereby effectively improving the safety and reliability of the system.

[0019] In summary, this application includes at least one of the following beneficial technical effects:

[0020] 1. Real-time monitoring of the weighing sensor is achieved. When the sensor breaks, an alarm is triggered immediately, effectively preventing data distortion and equipment downtime caused by sensor breakage, thereby improving production efficiency and product quality;

[0021] 2. By setting up a proximity switch and an alarm, and linking them with the first and second contactors, the alarm is quickly activated when the sensor breaks, making it easier for maintenance personnel to detect and handle the fault in a timely manner and avoid further losses. Attached Figure Description

[0022] Figure 1 This is a circuit diagram of an embodiment of this application. Detailed Implementation

[0023] The following is in conjunction with the appendix Figure 1 This application will be described in further detail.

[0024] This application discloses a breakage prevention alarm circuit for a weighing sensor.

[0025] Reference Figure 1A fault-prevention alarm circuit for a weighing sensor includes a proximity switch and an alarm. The proximity switch is positioned close to the weighing sensor support, and both the proximity switch and the alarm correspond one-to-one with the weighing sensor. The alarm is installed in an easily observable location so that maintenance personnel can promptly detect alarm information. When the weighing sensor breaks, the weighing body falls, triggering the proximity switch mounted on the sensor support.

[0026] Specifically, this includes the power supply transformer (PE) and the switch QS. The AC power supply terminal L is connected to pin 1 of switch QS, and pin 2 of switch QS is connected to pin 1 of the power supply transformer (PE). The AC power supply terminal N is connected to pin 3 of switch QS, and pin 4 of switch QS is connected to pin 2 of the power supply transformer (PE). By controlling the opening and closing of switch QS, the start and stop of the entire circuit can be controlled. When switch QS is closed, the power supply transformer (PE) converts the AC power to DC power. Switch QS can be a manually operated switch or an automatically reset switch. A manually operated switch is suitable for situations requiring human intervention, while an automatically reset switch can automatically restore power in unattended situations. The choice of different types of switches can be adjusted according to specific application scenarios and safety requirements.

[0027] Pin 3 of the power switch PE is electrically connected to the positive terminal of the proximity switch, and pin 4 of the power switch PE is electrically connected to the negative terminal of the proximity switch. When the proximity switch is not triggered, there is no voltage output at the S terminal; when the proximity switch is triggered, there is a voltage output at the S terminal. Specifically, different types and models of proximity switches can be selected, such as three-phase PNP proximity switches or other types of proximity switches (such as NPN type). The selection of different types of proximity switches can be adjusted according to the needs of the actual application scenario to adapt to different working environments and signal transmission requirements. For example, if higher sensitivity is required, a high-precision proximity switch can be selected; if a longer service life is required, a proximity switch made of wear-resistant materials can be selected.

[0028] The S-terminal of the proximity switch is electrically connected to the A2-terminal of the first contactor KM1, and the A1-terminal of the first contactor KM1 is electrically connected to pin 4 of the power switch PE. In this embodiment, the proximity switch is a three-phase PNP type proximity switch. When the proximity switch is not triggered, there is no voltage output at the S-terminal of the proximity switch, and the first contactor KM1 is not triggered; when the proximity switch is triggered, there is a voltage output at the S-terminal of the proximity switch, thereby triggering the first contactor KM1.

[0029] This application embodiment also includes a first contactor KM1 and a second contactor KM2. The A1 terminal of the first contactor KM1 is electrically connected to pin 4 of the power switch PE, and the A2 terminal of the first contactor KM1 is electrically connected to the S terminal of the proximity switch. The A3 terminal of the first contactor KM1 is electrically connected to pin 2 of the switch QS, and the A4 terminal of the first contactor KM1 is electrically connected to the A1 terminal of the second contactor KM2. The A2 terminal of the second contactor KM2 is electrically connected to pin 4 of the switch QS. When the first contactor KM1 is not triggered, its A3 and A4 terminals are open; when the first contactor KM1 is triggered, its A3 and A4 terminals are closed. The A3 terminal of the second contactor KM2 is electrically connected to pin 2 of the switch QS, and its A4 terminal is electrically connected to the A4 terminal of the first contactor KM1. The A4 terminal of the second contactor KM2 is also electrically connected to one end of the alarm H, and the other end of the alarm H is electrically connected to pin 4 of the switch QS. When the second contactor KM2 is not triggered, terminals A3 and A4 of the second contactor KM2 are disconnected; when the second contactor KM2 is triggered, terminals A3 and A4 of the second contactor KM2 are electrically connected.

[0030] Alarm H can also be equipped with different types of lighting fixtures, such as LED lights or halogen lamps. Choosing different types of alarm H is primarily to meet different lighting needs and energy consumption requirements. For example, LED lights have the advantages of energy saving and long lifespan, making them suitable for long-term use; while halogen lamps, although consuming more energy, may be more reliable in certain special environments. Furthermore, the color of alarm H can be red, as red typically indicates an emergency and is more likely to attract attention.

[0031] Preferably, when there are a large number of sensors, a multi-channel alarm system can be used, with each sensor equipped with an independent proximity switch and alarm, forming a multi-point monitoring network. This way, even if a sensor breaks, the fault location can be immediately pinpointed, preventing disruption to the overall production line operation. Furthermore, this circuit can be integrated with the production process, enabling the system to automatically stop in the event of a fault, preventing the situation from escalating.

[0032] The implementation principle of the anti-breakage alarm circuit for a weighing sensor in this application embodiment is as follows: First, the switch QS is closed to start the circuit. When the weighing sensor breaks, causing the weighing body to fall, a proximity switch is triggered, thereby connecting and triggering the first trigger KM1, which in turn connects and triggers the second trigger KM2, ultimately causing the alarm to light up. This circuit can monitor the status of the weighing sensor in real time and promptly alarm when the sensor breaks. This not only improves production efficiency but also ensures the stability of concrete quality.

[0033] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A breakage prevention alarm circuit for a weighing sensor, characterized in that: It includes a proximity switch, a first contactor KM1, a second contactor KM2, a power switch PE, and an alarm H; the proximity switch is located near the meter sensor support, and is triggered when the meter sensor breaks. The L terminal of the AC power supply is electrically connected to pin 1 of the power switch PE, and the N terminal of the AC power supply is electrically connected to pin 2 of the power switch PE; the positive terminal of the proximity switch is electrically connected to pin 3 of the power switch PE, and the negative terminal of the proximity switch is electrically connected to pin 4 of the power switch PE; the S terminal of the proximity switch is electrically connected to the A2 terminal of the first contactor KM1, and the A1 terminal of the first contactor KM1 is electrically connected to pin 4 of the power switch PE. The A3 terminal of the first contactor KM1 is electrically connected to pin 1 of the power switch PE, the A4 terminal of the first contactor KM1 is electrically connected to the A1 terminal of the second contactor KM2, and the A2 terminal of the second contactor KM2 is electrically connected to pin 2 of the power switch PE. The A3 terminal of the second contactor KM2 is electrically connected to pin 1 of the power switch PE, the A4 terminal of the second contactor KM2 is electrically connected to one end of the alarm H, and the other end of the alarm H is electrically connected to the A2 terminal of the second contactor KM2.

2. The anti-breakage alarm circuit for a weighing sensor according to claim 1, characterized in that: It also includes a switch QS, with the AC power supply L terminal electrically connected to pin 1 of the switch QS, and pin 2 of the switch QS electrically connected to pin 1 of the power switch PE; The N terminal of the AC power supply is electrically connected to pin 3 of the switch QS, and pin 4 of the switch QS is electrically connected to pin 2 of the power switch PE.

3. The anti-breakage alarm circuit for a weighing sensor according to claim 2, characterized in that: The switch QS is a manually operated switch.

4. The anti-breakage alarm circuit for a weighing sensor according to claim 1, characterized in that: The proximity switch is a three-phase PNP type proximity switch.

5. The anti-breakage alarm circuit for a weighing sensor according to claim 1, characterized in that: The alarm H is an LED light.

6. A metering sensor anti-breakage alarm circuit according to claim 1 or 5, characterized in that: The alarm H is red.

Images