Wiring terminal in-place installation detection device and system

Abstract

The utility model discloses a wiring terminal in-place installation detection device and system, and particularly relates to the technical field of installation detection. The first monitoring unit and the second monitoring unit respectively monitor physical connection states of two sides of the wiring terminal, and the logic gate unit performs logic judgment on a first digital signal acquired by the first monitoring unit and a second digital signal acquired by the second monitoring unit and outputs a detection result; whether the wiring terminal is installed in place or not is detected through the automatic detection device, the working efficiency is improved, manual operation errors and missing detection are reduced, and the quality stability of products is improved. The logic circuit performs logic judgment according to the data of the plurality of monitoring units, so that the fault tolerance of the circuit is improved, and the accuracy of a detection result can be ensured even if the monitoring units fail.

Description

Technical Field

[0001] The utility model relates to the technical field of installation detection, and in particular to a device and a system for detecting the installation position of a wiring terminal. Background Art

[0002] When using PLC and other controllers to expand distributed IO in industrial sites, there are a series of potential installation problems and potential fault hazards when the split terminal is connected to the main body, including:

[0003] Improper installation: Due to negligence or misoperation by the staff, the terminal may not be properly installed, resulting in loose connection or poor contact.

[0004] Mechanical vibration causing loosening: Mechanical vibration is a common problem in industrial environments, which can cause terminals to loosen or connections to fail.

[0005] Shell aging and deformation leading to falling off: As time goes by and the working environment affects the terminal, the shell where the terminal is located may age or deform, causing the terminal to fall off or the connection to be unreliable.

[0006] Such faults cannot be found and detected quickly and effectively with existing technologies. In this case, if these faults cannot be found and detected in a timely and effective manner, serious consequences such as serious production interruption, equipment damage and even casualties may occur. Utility Model Content

[0007] The technical problem to be solved by the utility model is that the existing technology cannot quickly and effectively discover and detect installation faults of terminal blocks, and there are safety risks. The utility model aims to provide a terminal installation detection device and system, which can detect installation faults of terminal blocks in time through the cooperation of a first monitoring unit, a second monitoring unit and a logic gate unit, so as to avoid risks such as interruption and equipment damage.

[0008] The utility model is realized by the following technical solutions:

[0009] This solution provides a terminal installation detection device, including:

[0010] A first monitoring unit, used to obtain a first digital signal corresponding to a physical connection state of the first port, wherein the first monitoring unit is electrically connected to a circuit to be installed of the first port;

[0011] A second monitoring unit, used for acquiring a second digital signal corresponding to the physical connection state of the second port, wherein the second monitoring unit is electrically connected to the circuit to be installed of the second port;

[0012] The first port and the second port belong to the same wiring terminal;

[0013] The logic gate unit is used to perform logic judgment on the first digital signal and the second digital signal and output a detection result. The first monitoring unit and the second monitoring unit are both electrically connected to the logic gate unit.

[0014] A further optimized solution is that the first monitoring unit and the second monitoring unit have a circuit module and a collection sensor with the same structure; the collection sensor is connected to the circuit module;

[0015] The circuit module includes an input port, a filter circuit, a pull-up circuit and an output port connected in sequence;

[0016] The output port of the first monitoring unit and the output port of the second monitoring unit are both connected to the logic gate unit.

[0017] A further optimization scheme is that the filtering circuit includes a bidirectional TVS tube D1; one end of the bidirectional TVS tube D1 is grounded and the other end is connected to the output port;

[0018] The pull-up circuit includes: a resistor R1, a resistor R3 and a diode D3;

[0019] The cathode of the diode D3 is connected to the input port, and the anode of the diode D3 is connected to the output port after being connected in series with the resistor R3; one end of the resistor R1 is connected between the diode D3 and the resistor R3, and the other end of the resistor R1 is connected to the VCC power supply.

[0020] A further optimization scheme is that the circuit module further includes a filter circuit; the filter circuit includes a capacitor C1; one end of the capacitor C1 is connected between the diode D3 and the resistor R3, and the other end of the capacitor C1 is grounded.

[0021] A further optimization scheme is that the logic gate unit includes a logic circuit, a pull-down circuit, a current limiting filter circuit and an IO output interface which are electrically connected in sequence.

[0022] A further optimized solution is that the logic circuit includes a first NOT gate, a second NOT gate and a two-input AND gate;

[0023] The output port of the first monitoring unit is connected to the first NOT gate and then to the first input of the two-input AND gate. The output port of the second monitoring unit is connected to the second NOT gate and then to the second input of the two-input AND gate. The output of the two-input AND gate is connected to the pull-down circuit.

[0024] A further optimized solution is that the pull-down circuit includes a resistor R5, one end of the resistor R5 is connected to the output end of the two-input AND gate, and the other end is grounded.

[0025] A further optimization scheme is that the current limiting filter circuit includes a resistor R6 and a capacitor C3, one end of the resistor R6 is connected to the output end of the two-input AND gate, and the other end of the resistor R6 is connected to the IO output interface; one end of the capacitor C3 is connected to the IO output interface, and the other end of the capacitor C3 is grounded.

[0026] The present solution also provides a terminal installation detection system, comprising one or more of the above-mentioned terminal installation detection devices.

[0027] A further optimization scheme is that multiple wiring terminals are installed in cascade connection between the detection devices.

[0028] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0029] The utility model provides a terminal installation detection device and system, which can detect the installation failure of the terminal in time through the cooperation of the first monitoring unit, the second monitoring unit and the logic gate unit, so as to avoid the risks of interruption, equipment damage, etc. The automated detection device detects whether the terminal is installed in place, improves work efficiency, reduces manual operation errors and missed detections, and improves the quality stability of the product; the logic circuit makes logical judgments based on the data of multiple monitoring units, increases the fault tolerance of the circuit, and ensures the accuracy of the detection results even if the monitoring unit fails. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings described herein are used to provide a further understanding of the embodiments of the present utility model, constitute a part of this application, and do not constitute a limitation of the embodiments of the present utility model. In the drawings:

[0031] Figure 1 This is a schematic diagram of the structure of the terminal installation detection device;

[0032] Figure 2 This is a schematic diagram of the principle of detecting the wiring terminals being installed in place;

[0033] Figure 3 This is a schematic diagram of the circuit structure for detecting the wiring terminals being installed in place;

[0034] Figure 4 A schematic diagram of cascading multiple terminal installation detection devices;

[0035] Figure 5 A schematic diagram of the cascade connection of a detection circuit for multiple terminal blocks being installed in place;

[0036] Figure 6 This is a schematic diagram of the wiring terminals being installed in place;

[0037] Figure 7 This is a diagram showing that the wiring terminal is not installed properly. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solutions and advantages of the utility model more clearly understood, the utility model is further described in detail below in conjunction with embodiments and drawings. The schematic implementation manner of the utility model and its description are only used to explain the utility model and are not intended to limit the utility model.

[0039] In practice, there are two phenomena that may occur in various wiring terminals. The first is that the wiring terminals are installed correctly, such as Figure 6 As shown; the second is due to improper installation of the upper end surface of the terminal, the gap between the male and female sockets is large, causing the internal metal springs to not contact or have poor contact; such as Figure 7 In order to promptly detect the situation where the installation is not in place, the utility model provides the following embodiments to detect whether the terminal block is installed in place:

[0040] Example 1

[0041] This embodiment provides a terminal installation detection device. Figure 1-Figure 2 As shown, including:

[0042] A first monitoring unit, used to obtain a first digital signal corresponding to a physical connection state of the first port, wherein the first monitoring unit is electrically connected to a circuit to be installed of the first port;

[0043] a second monitoring unit, used to obtain a second digital signal corresponding to the physical connection state of the second port, wherein the second monitoring unit is electrically connected to the circuit to be installed of the second port;

[0044] The first port and the second port belong to the same wiring terminal;

[0045] The logic gate unit is used to perform logic judgment on the first digital signal and the second digital signal and output the detection result, and the first monitoring unit and the second monitoring unit are both electrically connected to the logic gate unit. In this embodiment, the switch state of the switch S1 is used to simulate the physical connection state of the first port, and the switch state of the switch S2 is used to simulate the physical connection state of the second port.

[0046] The first monitoring unit and the second monitoring unit have a circuit module and a collection sensor with the same structure; the collection sensor is connected to the circuit module;

[0047] The circuit module includes an input port, a filtering circuit, a pull-up circuit and an output port connected in sequence; a sensor collects a signal of whether the first port / the second port of the terminal block is installed in place; the terminal position is detected with high accuracy by the sensor and the logic circuit to reduce manual operation errors and missed detections, thereby improving the quality stability of the product.

[0048] The output port of the first monitoring unit and the output port of the second monitoring unit are both connected to the logic gate unit.

[0049] In the specific implementation process of this embodiment, Figure 3 As shown, the filtering circuit of the first monitoring unit includes a bidirectional TVS tube D3; one end of the bidirectional TVS tube D3 is grounded, and the other end is connected to the output port;

[0050] The pull-up circuit of the first monitoring unit includes: resistor R1, resistor R3 and diode D3; the cathode of diode D3 is connected to the input port, and the anode of diode D3 is connected to the output port after being connected in series with resistor R3; one end of resistor R1 is connected between diode D3 and resistor R3, and the other end of resistor R1 is connected to VCC power supply. The pull-up circuit of the first monitoring unit / the second monitoring unit pulls up the signal of the input port, so that the signal is low level when the terminal is not connected or connected incorrectly.

[0051] In the circuit of this embodiment, a protection element and a stabilization circuit are provided to protect and stabilize the input signal, thereby reducing the circuit failure rate and extending the service life of the device.

[0052] The first monitoring unit also includes a filter circuit; the filter circuit includes a capacitor C1; one end of the capacitor C1 is connected between the diode D3 and the resistor R3, and the other end of the capacitor C1 is grounded. The filter circuit of the first monitoring unit / the second monitoring unit can prevent jitter at the moment of terminal access.

[0053] The filtering circuit of the second monitoring unit includes a bidirectional TVS tube D2; one end of the bidirectional TVS tube D2 is grounded and the other end is connected to the output port;

[0054] The pull-up circuit of the second monitoring unit includes: a resistor R2, a resistor R4 and a diode D4; the cathode of the diode D4 is connected to the input port, and the anode of the diode D4 is connected in series with the resistor R4 and then connected to the output port; one end of the resistor R3 is connected between the diode D4 and the resistor R4, and the other end of the resistor R3 is connected to the VCC power supply. The second monitoring unit also includes a filter circuit; the filter circuit includes a capacitor C2; one end of the capacitor C2 is connected between the diode D4 and the resistor R4, and the other end of the capacitor C2 is grounded.

[0055] In the actual implementation process, the parameters of the bidirectional TVS tubes D1 and D2 are 30V; the parameters of the diodes D3 and D4 are 1A / 1kV; the resistors R1 and R2 are both 10kΩ; the resistors R3 and R4 are both 220Ω; the capacitors C1 and C2 are 1uF / 50V;

[0056] The logic unit includes a logic circuit, a pull-down circuit, a current limiting filter circuit and an IO output interface which are electrically connected in sequence.

[0057] The logic circuit includes a first NOT gate, a second NOT gate and a two-input AND gate;

[0058] The output port of the first monitoring unit is connected to the first NOT gate and then to the first input of the two-input AND gate. The output port of the second monitoring unit is connected to the second NOT gate and then to the second input of the two-input AND gate. The output of the two-input AND gate is connected to the pull-down circuit.

[0059] The pull-down circuit includes a resistor R5, one end of which is connected to the output end of the two-input AND gate, and the other end of which is grounded. The resistor R5 is 10 kΩ; the pull-down circuit determines a fixed low-level signal when the logic signal is not enabled.

[0060] The current limiting filter circuit includes a resistor R6 and a capacitor C3. One end of the resistor R6 is connected to the output end of the two-input AND gate, and the other end of the resistor R6 is connected to the IO output interface; one end of the capacitor C3 is connected to the IO output interface, and the other end of the capacitor C3 is grounded. The resistor R6 is 51Ω; the capacitor C3 is 1uF / 50V; the resistor R6 is used as a current limiting resistor, and the capacitor C3 is a filter capacitor to prevent signal jitter.

[0061] When the terminal block is not inserted, the outputs of the first monitoring unit and the second monitoring unit are both high level, and the logic unit determines that the output signal is a high level signal; the default state of the output port of the logic unit is pull-down, and the normal output is low level; when the terminal block is plugged in correctly, the outputs of the first monitoring unit and the second monitoring unit are both low level. After filtering, it can be directly input into the control chip or other automation system units. Then when any group of outputs in the first monitoring unit and the second monitoring unit is low level, the signal output by the logic unit must be low, and the signal transmitted to the processor indicates that the plug-in terminal is not installed correctly. On the contrary, when the outputs in the first monitoring unit and the second monitoring unit are high level, it means that the terminal plug-in is installed correctly and the system can get a correct input signal.

[0062] The design of this circuit is based on two sets of switch input signals (DI_IN1, DI_IN2), which are composed of bidirectional 30V TVS tubes, which can prevent external signals from affecting the input of the wiring port and effectively filter surge and electrostatic signals. The input signal is pulled up by the port composed of D3\R1 and D4\R2, so that even if the wiring terminal is not inserted or inserted incorrectly, the signal will remain at a low level;

[0063] The above device can be applied to various occasions where terminal installation detection is required, such as slots and connectors of electronic equipment.

[0064] The terminal installation detection device includes a dual-input logic gate circuit for determining signals indicating that both sides of the terminal are installed in place at the same time. When there is no signal at one end or both ends according to preset conditions, no output signal indicating that the terminal is installed in place will be output.

[0065] The IO output interface of the logic unit can be connected to an LED indicator to issue an alarm signal and attract the attention of the staff. In addition, the logic unit can also be integrated with other systems to enable the upload of process data.

[0066] The entire terminal installation detection device can be customized and adjusted according to specific application requirements. By reasonably designing and configuring the first monitoring unit, the second monitoring unit and the logic unit, efficient and accurate monitoring and control of the terminal connection status can be achieved.

[0067] When the terminal block is installed to the predetermined position, it can be shown as Figure 2 When both switch S1 and switch S2 are closed, the logic unit performs AND judgment on the two input signals and outputs the installed output signal. When any one of switch S1 and switch S2 is not closed, under the judgment of the logic circuit, there will be no installed signal output.

[0068] The first monitoring unit and the second monitoring unit are set to be effective for low-level signals, which can effectively detect signals while reducing the difficulty of circuit PCB layout. The diode connected in series in the input loop can play a certain protective role against high-level large voltages when the terminal is misplaced. Strong pull-up is performed on invalid input signals to stabilize the input level and increase the fault tolerance of the logic circuit. For example: After the switch S1 is closed, the power supply will flow through the pull-up resistor R3 through the diode D3, and then through the closed switch S1 to the ground. At this time, the output of the first monitoring unit will change from a high level to a low level to trigger the signal of terminal installation. The two sets of detection circuits are similar, and they work together to complete the detection of the installation signal.

[0069] Example 2

[0070] This embodiment provides a terminal installation detection system, comprising one or more terminal installation detection devices. Multiple terminal installation detection devices are cascaded.

[0071] like Figure 4 and Figure 5 As shown in the figure, the single-end detection can be directly extended to a dual-end or multi-end detection system. Figure 6 and Figure 7 The cascade of detection systems can effectively complete the installation detection of multiple terminals of complex products.

[0072] Specifically, the double-terminal installation detection circuit is configured as two groups of single-end components, and its working principle is the same as that of Example 1. This double-terminal installation detection circuit schematic diagram shows how to expand the single-end detection system to double-end detection, and shows how to cascade multiple detection systems to achieve multi-terminal installation detection of complex products.

[0073] The detection system of each terminal is similar to the single-terminal detection system described above, including a first monitoring unit, a second monitoring unit, a logic unit and an output control part. Each sub-detection device in the multi-terminal detection system can detect and work independently to ensure that the installation status of each terminal can be accurately detected.

[0074] In addition, when it is necessary to detect the installation of more terminals, multiple detection devices can be connected in series to achieve simultaneous detection of multiple terminals. Such a cascade structure can effectively complete the installation detection of multiple terminals of complex products, improving the detection efficiency and accuracy.

[0075] The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only the specific implementation method of the utility model and is not used to limit the protection scope of the utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A terminal installation detection device, characterized in that: include: A first monitoring unit, used to obtain a first digital signal corresponding to a physical connection state of the first port, wherein the first monitoring unit is electrically connected to a circuit to be installed of the first port; a second monitoring unit, used to obtain a second digital signal corresponding to the physical connection state of the second port, wherein the second monitoring unit is electrically connected to the circuit to be installed of the second port; The first port and the second port belong to the same wiring terminal; The logic gate unit is used to perform logic judgment on the first digital signal and the second digital signal and output a detection result. The first monitoring unit and the second monitoring unit are both electrically connected to the logic gate unit.

2. A terminal installation detection device according to claim 1, characterized in that: The first monitoring unit and the second monitoring unit have a circuit module and a collection sensor with the same structure; the collection sensor is connected to the circuit module; The circuit module includes an input port, a filter circuit, a pull-up circuit and an output port connected in sequence; The output port of the first monitoring unit and the output port of the second monitoring unit are both connected to the logic gate unit.

3. A terminal installation detection device according to claim 2, characterized in that: The filtering circuit includes a bidirectional TVS tube D1; one end of the bidirectional TVS tube D1 is grounded and the other end is connected to the output port; The pull-up circuit includes: a resistor R1, a resistor R3 and a diode D3; The cathode of the diode D3 is connected to the input port, and the anode of the diode D3 is connected to the output port after being connected in series with the resistor R3; one end of the resistor R1 is connected between the diode D3 and the resistor R3, and the other end of the resistor R1 is connected to the VCC power supply.

4. A terminal installation detection device according to claim 3, characterized in that: The circuit module further includes a filter circuit; the filter circuit includes a capacitor C1; one end of the capacitor C1 is connected between the diode D3 and the resistor R3, and the other end of the capacitor C1 is grounded.

5. A terminal installation detection device according to claim 2, characterized in that: The logic gate unit comprises a logic circuit, a pull-down circuit, a current limiting filter circuit and an IO output interface which are electrically connected in sequence.

6. A terminal installation detection device according to claim 5, characterized in that: The logic circuit includes a first NOT gate, a second NOT gate and a two-input AND gate; The output port of the first monitoring unit is connected to the first NOT gate and then to the first input of the two-input AND gate. The output port of the second monitoring unit is connected to the second NOT gate and then to the second input of the two-input AND gate. The output of the two-input AND gate is connected to the pull-down circuit.

7. A terminal installation detection device according to claim 5, characterized in that: The pull-down circuit comprises a resistor R5, one end of which is connected to the output end of the two-input AND gate, and the other end of which is grounded.

8. A terminal installation detection device according to claim 5, characterized in that: The current limiting filter circuit includes a resistor R6 and a capacitor C3, one end of the resistor R6 is connected to the output end of the two-input AND gate, and the other end of the resistor R6 is connected to the IO output interface; one end of the capacitor C3 is connected to the IO output interface, and the other end of the capacitor C3 is grounded.

9. A terminal installation detection system, characterized in that: The invention comprises a terminal installation detection device according to any one of claims 1 to 8.

10. A terminal installation detection system according to claim 9, characterized in that: Multiple wiring terminals are installed in cascade connection between the detection devices.

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