A segmented touch edge safety detection device

Abstract

This utility model discloses a segmented contact edge safety detection device, comprising: a contact edge controller and a safety contact edge connected to the contact edge controller; the safety contact edge is multi-segmented, and each segment of the safety contact edge is electrically connected to a detection resistor; the contact edge detector is equipped with a voltage comparator, which is connected to the safety contact edge. By electrically connecting the detection resistor to the segment end of each safety contact edge, this utility model can detect and distinguish the specific location of the trigger contact edge detection, thereby achieving detailed positioning of the trigger point. Because it can accurately locate the trigger position, this device can respond to safety events more quickly, stop the machine in time, or take other safety measures, reducing injuries caused by moving parts of mechanical equipment. The contact edge controller is equipped with multiple contact edge output points and disconnection output points, facilitating integration with the control system of mechanical equipment to achieve automated safety control.

Description

Technical Field

[0001] This utility model relates to the field of edge safety detection technology, and more specifically to a segmented edge safety detection device. Background Technology

[0002] Safety edge detection is a technology used to ensure the safe operation of mechanical equipment. It detects contact by installing safety edges on the moving parts of the equipment to prevent or reduce injuries caused by these moving components. When a person or object comes into contact with the edge, it can identify and trigger appropriate safety measures, such as stopping the automatic drive of the machine to prevent injuries from clamping, shearing, and crushing. These are typically installed on moving parts of mechanical equipment, such as doors and fences, to prevent hazards posed by moving parts, or to shut down the entire system upon detecting contact with a person or object.

[0003] Safety edges are widely used in situations requiring personal protection, such as roller shutters, reciprocating worktables of machine tools, and protective doors for processing machinery. They have applications in various fields, including urban safety, traffic safety, environmental safety, and industrial safety, and are directly related to the safety of people's lives and property and social stability.

[0004] The patent application, CN104236594A, entitled "A Safety Edge Status Detection Circuit," includes a voltage follower, a first comparator, a second comparator, a matching resistor, a first voltage divider and current limiting resistor, a first current limiting resistor, a second current limiting resistor, a first voltage divider resistor, a second voltage divider resistor, and a third voltage divider resistor. The non-inverting input of the voltage follower is connected to the positive output of a safety edge sensor. The non-inverting input of the first comparator is connected to the negative output of the safety edge sensor via the third voltage divider resistor. The inverting input of the first comparator is connected to the output of the voltage follower via the first current limiting resistor. The non-inverting input of the second comparator is connected to both the inverting input and the output of the voltage follower via the second current limiting resistor.

[0005] Publication number CN113483787A, entitled "A Controlled Device and its Safety Edge Sensor State Detection Circuit," includes: a first relay, a triggering circuit, and a controller. When the safety edge sensor is in a normal state, the first relay is in a non-engaged state. The first controlled branch of the first relay is connected in series in the electrical safety circuit of the controlled device, and the second controlled branch is connected in series in the detection circuit of the controller to enable the controller to determine that the first relay is currently in a non-engaged state. When the safety edge sensor is open-circuited, or in a low-resistance triggering state after being compressed, the control coil is engaged. The first controlled branch is engaged by the control coil to disconnect the electrical safety circuit, and the second controlled branch is engaged by the control coil to enable the controller to determine that the first relay is currently engaged.

[0006] However, existing edge safety detection methods focus on the reliability and speed of detecting the state of the edge safety sensor. The edge safety is still detected as a whole segment, and it is impossible to use a single edge safety detection device to detect and distinguish the detailed location of the trigger.

[0007] Therefore, how to provide a segmented edge safety detection device that can detect which part of the current component has triggered the edge detection, locate the edge position in detail, and output the edge position is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0008] In view of this, the present invention provides a segmented edge safety detection device, which aims to solve the technical problem that it is impossible to use a single safety edge detection device to detect and distinguish the detailed location of the trigger.

[0009] To achieve the above objectives, the present invention adopts the following technical solution:

[0010] A segmented contact edge safety detection device includes: a contact edge controller and a safety contact edge connected to the contact edge controller;

[0011] The safety contact is multi-segmented, and each segment of the safety contact is connected in series with a segmented resistor.

[0012] The contact edge controller is equipped with a resistance detection unit, which is connected to the safety contact edge.

[0013] Furthermore, the touch edge controller is provided with multiple touch edge output points, which are connected to the resistance detection unit. The resistance detection unit triggers the corresponding touch edge output point to output a signal based on the detected resistance value.

[0014] Furthermore, a break detection resistor is provided at the end of the safety contact edge, and a break output point is provided on the contact edge controller. The break output point is connected to the resistance detection unit, and the resistance value triggers the break output point to output a signal based on the detected resistance value.

[0015] Furthermore, the touch edge controller is provided with a power connection point, which is connected to an external power source.

[0016] The above technical solution includes at least the following technical effects:

[0017] As can be seen from the above technical solution, this utility model discloses a segmented contact edge safety detection device. Compared with the prior art, this utility model, by setting segmented resistors at the segmentation points of each safety contact edge, can detect and distinguish the specific location of the trigger point, thereby achieving detailed positioning of the trigger point. Because it can accurately locate the trigger position, this device can respond to safety events more quickly, stop the machine in time, or take other safety measures, reducing injuries caused by moving parts of mechanical equipment. Through the connection of a voltage comparator with the safety contact edge, the device can trigger the corresponding contact edge output point to output a signal based on the detected voltage, improving the reliability of safety detection. The contact edge controller is equipped with multiple contact edge output points and disconnection output points, facilitating integration with the control system of mechanical equipment to achieve automated safety control. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of a segmented edge safety detection device according to the present invention.

[0020] Figure 2 This is a schematic diagram of a contact circuit structure with a break detection resistor according to the present invention.

[0021] Figure 3 This is a schematic diagram of a contact circuit structure without a break detection resistor according to the present invention.

[0022] Wherein, 1 is the contact edge controller, 2 is the safety contact edge, 3 is the wire breakage detection resistor, 4 is the segmented resistor, 11 is the contact edge output point, 12 is the wire breakage output point, and 13 is the power supply connection point. Detailed Implementation

[0023] The technical solutions in the embodiments of this utility model are described clearly and completely below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the 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.

[0024] See appendix Figure 1This utility model discloses a segmented contact edge safety detection device, including: a contact edge controller (1) and a safety contact edge (2) connected to the contact edge controller (1); the safety contact edge (2) is multi-segmented, and each segment of the safety contact edge (2) is connected in series with a segmented resistor (4).

[0025] The touch edge controller (1) is provided with multiple touch edge output points (11), which are connected to the resistance detection unit. The resistance detection unit triggers the corresponding touch edge output point (11) to output a signal based on the detected resistance. A wire break detection resistor (3) is provided at the end of the safety touch edge. A wire break output point (12) is provided on the touch edge controller (1), which is connected to the resistance detection unit. The resistance value triggers the wire break output point (12) to output a signal based on the detected resistance value. A power connection point (13) is provided on the touch edge controller (1), which is connected to an external power source.

[0026] The resistance detection unit specifically acquires the current of safety contact 2 and calculates the resistance of the safety contact 2 circuit by comparing it with a fixed voltage.

[0027] When the safety contact end of this application is equipped with a break-through detection resistor 3, the specific implementation process is as follows:

[0028] Safety contact 2 is divided into 4 segments. Segment resistor 4 is connected in series between segments 1 and 2, 2 and 3, and 3 and 4. Disconnection detection resistor 3 is connected in series at the end of segment 4. See the circuit diagram for details. Figure 2 When the first segment is triggered by compression, it conducts through the N1 region. The resistance detection unit in the edge controller 1 detects the resistance of the first segment itself and triggers the corresponding area output point. When the second segment is triggered, it conducts through the N2 region. Therefore, the resistance detection unit in the edge controller 1 detects the resistance of the first segment, the resistance of the second segment, and the segmented resistance 4 at the connection between the first and second segments. Thus, the resistance detection unit obtains the sum of the resistances of the three segments and triggers the corresponding area output point, namely the area 2 output point. The triggering condition of the area output point of the safety edge 2 is preset by human, and its setting value is determined based on the resistance of the segmented resistance 4.

[0029] The end of the safety contact 2 is equipped with a circuit breaker detection resistor 3. Therefore, the entire safety contact forms a loop through the first, second, third, and fourth segments, the segment resistors 4 between each segment, and the circuit breaker detection resistor 3. The resistance detection unit in the contact controller 1 collects the resistance values ​​of all resistors and segments. When the safety contact 2 is open-circuited, the loop is open, the resistance value disappears, and the resistance value obtained by the resistance detection unit is 0, thereby determining that the safety contact 2 is open-circuited and triggering the disconnection output point to output a signal.

[0030] When the safety contact end of this application is not equipped with a break-through detection resistor 3, the specific implementation process is as follows:

[0031] like Figure 3 As shown, the safety contact 2 is divided into 4 segments. Segment resistors 4 are connected in series between segments 1 and 2, segments 2 and 3, and segments 3 and 4. Since no open circuit detection resistor 3 is set, the safety contact 2 is in an open circuit state. When segment 1 of the safety contact 2 is triggered, switch N1 is turned on, and the resistance detection unit in the contact controller 1 detects the resistance of segment 1 itself, thereby triggering the output point of area 1. When segment 2 is triggered, segments 1 and 2, in which the segment resistor 4 is connected in series, are connected. The resistance detection unit obtains the current resistance value and triggers the output signal of the output point of area 2 based on the preset area output point triggering conditions.

[0032] The power connection point 13 of the touch edge controller 1 is connected to an external 24V power supply to power the touch edge controller 1.

[0033] 1. System Overview

[0034] This embodiment describes a segmented contact edge safety detection device, which can accurately detect and locate the specific position of the trigger contact edge, thereby achieving safe control of moving parts of mechanical equipment. The device includes key components such as a contact edge controller, a safety contact edge, a detection resistor, and a voltage comparator. Through the coordinated operation of these components, safety protection for the mechanical equipment is achieved.

[0035] 2. System Composition

[0036] 2.1 Edge Controller

[0037] The edge contact controller is the control center of the entire system, responsible for receiving signals from the safety edge and controlling the safety measures of the mechanical equipment based on these signals. The edge contact controller has the following functions:

[0038] Multiple contact output points: used for integration with the control system of mechanical equipment to achieve automated safety control.

[0039] Disconnection output point: Outputs a signal when the safety contact is disconnected or damaged, alerting the main controller to the safety contact failure and prompting the system to stop for maintenance.

[0040] Power connection point: Connect to an external power source to power the touch controller.

[0041] 2.2 Safety Edge

[0042] Safety contacts are components that come into direct contact with the moving parts of mechanical equipment. They are designed with a multi-segment structure, with a detection resistor electrically connected to the end of each segment. This design allows the system to detect and distinguish the specific location where the contact detection is triggered.

[0043] 2.3 Segmented Resistors

[0044] The segmented resistors are resistors connected to the ends of each segment of the safety contact, used to detect the trigger position of the contact. In this embodiment, the detection resistor has a resistance of 8.2KΩ, and different combinations of resistors are used to identify different trigger positions.

[0045] 2.4 Resistance Detection Unit

[0046] The resistance detection unit is a key component in the contact edge controller. It is used to compare the resistance of the safety contact edge and trigger the corresponding contact edge output point or disconnection output point based on the comparison result.

[0047] 3. Specific Implementation Steps

[0048] 3.1 System Installation

[0049] Installation of the edge controller: Install the edge controller inside the control cabinet of the mechanical equipment and ensure that its power connection point is connected to an external 24V power supply.

[0050] Safety contact edge installation: Install safety contacts on the moving parts of the mechanical equipment, ensuring that the end of each safety contact edge is electrically connected to the corresponding detection resistor.

[0051] 4.2 System Debugging

[0052] Set the resistance threshold: Based on the design of the safety contact edge and the resistance value of the segmented resistor, set the resistance threshold of the resistance detection unit to ensure accurate identification of the specific trigger location.

[0053] Test trigger signal: Simulate triggering different positions of the safety contact edge to check whether the contact edge controller can accurately output the corresponding contact edge output signal.

[0054] Test the disconnection signal: Simulate the situation of the safety contact edge disconnection and check whether the contact edge controller can accurately output the disconnection signal.

[0055] 4.3 System Integration

[0056] Connection and control system integration: Connect the contact output point of the contact controller to the control system of the mechanical equipment to achieve automated safety control.

[0057] Set safety measures: Based on the signal output by the edge controller, set appropriate safety measures, such as stopping the automatic drive of the machine, to prevent injuries from clamping, shearing, and squeezing.

[0058] This invention discloses a segmented contact edge safety detection device. Compared to existing technologies, this invention electrically connects segmented resistors at each segment of the safety contact edge. This allows the device to detect and distinguish the specific location triggering the contact edge detection, thus achieving precise positioning of the trigger point. Due to its accurate trigger location, the device can respond more quickly to safety events, promptly stop the machine, or take other safety measures, reducing injuries caused by moving parts of mechanical equipment. Through the connection of the resistance detection unit to the safety contact edge, the device can trigger the corresponding contact edge output point to output a signal based on the detected resistance, improving the reliability of safety detection. The contact edge controller has multiple contact edge output points and disconnection output points, facilitating integration with the control system of mechanical equipment for automated safety control.

[0059] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0060] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A segmented touch edge safety detection apparatus, characterized by, include: Touch edge controller (1) and safety touch edge (2) connected to the touch edge controller (1); The safety contact (2) is multi-segmented, and each segment of the safety contact (2) is connected in series with a segmented resistor (4). The contact edge controller (1) is equipped with a resistance detection unit, which is connected to the safety contact edge (2).

2. The segmented touch edge safety detection apparatus of claim 1, wherein, The touch edge controller (1) is provided with a plurality of touch edge output points (11), the touch edge output points (11) are connected to the resistance detection unit, and the resistance detection unit triggers the corresponding touch edge output point (11) to output a signal based on the detected resistance.

3. The segmented touch edge safety detection apparatus of claim 2, wherein, The end of the safety contact edge is provided with a broken wire detection resistor (3), and the contact edge controller (1) is provided with a broken wire output point (12). The broken wire output point (12) is connected to the resistance detection unit, and the resistance value triggers the broken wire output point (12) to output a signal based on the detected resistance value.

4. The segmented touch edge safety detection apparatus of claim 1, wherein, The touch edge controller (1) is provided with a power connection point (13), which is connected to an external power source.

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