Gating unit power supply voltage detection circuit, gating unit monitoring system and method

Abstract

The present invention provides a gate control unit power supply voltage detection circuit, a gate control unit monitoring system and a method. In the gate control unit power supply voltage detection circuit, the gate control unit monitoring system and the method provided by the present invention, the power supply voltage of the gate control unit can be detected in real time through the gate control unit power supply voltage detection circuit, and the motor output power is adjusted accordingly according to the real-time power supply voltage. In particular, when the power supply voltage is low but the operating door opening and closing time is met, the motor output power is appropriately reduced, thereby reducing the probability of misjudgment and effectively ensuring the normal operation of the gate control unit; at the same time, the fault signal is fed back to the outside world, so that the specific fault information can be clearly viewed, saving the time and labor costs of fault investigation and facilitating maintenance and protection.

Description

Technical Field

[0001] The present invention relates to the field of automation technology, and in particular to a gate control unit power supply voltage detection circuit, a gate control unit monitoring system and a method. Background Art

[0002] Currently, in rail transit operations, the power supply voltage of the platform gate control units (GCUs) is significantly reduced due to the length of the subway platform. This voltage gradually decreases from GCUs closer to the power supply to those further away. If the GCUs continue to operate at full power when the input voltage drops below a certain threshold, the motors may struggle to drive the shield doors, leading to false anti-pinch detections and disrupting subway operations. This is particularly true when the utility power fails and the battery is used for power.

[0003] Therefore, it is necessary to detect the power supply voltage of the gate control unit and appropriately adjust the motor output power to ensure the normal operation of the gate control unit. Summary of the Invention

[0004] In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a technical solution for monitoring the power supply voltage of a gate control unit, so as to solve the above-mentioned technical problems.

[0005] To achieve the above-mentioned and other related objectives, the present invention first provides a gate control unit power supply voltage detection circuit, comprising:

[0006] A voltage dividing unit, the input end of which is connected to the supply voltage of the gate control unit, and the output end of which outputs the divided sampling voltage;

[0007] A signal conditioning unit, wherein the signal input terminal is connected to the output terminal of the voltage divider unit, and the signal output terminal outputs a conditioned voltage;

[0008] The control processing unit has an analog-to-digital conversion port connected to the signal output terminal of the signal conditioning unit, and calculates the power supply voltage of the gate control unit according to the value of the conditioning voltage.

[0009] Optionally, the voltage divider unit includes a first resistor and a second resistor, the supply voltage is grounded after passing through the first resistor and the second resistor connected in series, and a common end of the first resistor and the second resistor outputs the divided sampling voltage.

[0010] Optionally, the voltage divider unit further includes a third resistor, a fourth resistor, and a first unidirectional transient suppression diode, the third resistor and the fourth resistor are respectively connected in parallel with the first resistor, the anode of the first unidirectional transient suppression diode is grounded, and the cathode of the first unidirectional transient suppression diode is connected to the common end of the first resistor and the second resistor.

[0011] Optionally, the signal conditioning unit includes a signal conditioning module, a first capacitor and a second capacitor, the positive pole of the power input terminal of the signal conditioning module is connected to the working voltage, the negative pole of the power input terminal of the signal conditioning module is grounded, the positive pole of the signal input terminal of the signal conditioning module is connected to the voltage-divided sampling voltage, the negative pole of the signal input terminal of the signal conditioning module is grounded, the positive pole of the signal output terminal of the signal conditioning module outputs the conditioning voltage, the negative pole of the signal output terminal of the signal conditioning module is grounded, one end of the first capacitor is grounded, the other end of the first capacitor is connected to the positive pole of the power input terminal of the signal conditioning module, one end of the second capacitor is grounded, and the other end of the second capacitor is connected to the positive pole of the signal input terminal of the signal conditioning module.

[0012] Optionally, the signal conditioning unit further includes a second unidirectional transient suppression diode and a third unidirectional transient suppression diode, the anode of the second unidirectional transient suppression diode being grounded, the cathode of the second unidirectional transient suppression diode being connected to the positive pole of the power input terminal of the signal conditioning module, the anode of the third unidirectional transient suppression diode being grounded, and the cathode of the third unidirectional transient suppression diode being connected to the positive pole of the signal output terminal of the signal conditioning module.

[0013] Optionally, the first unidirectional transient suppression diode, the second unidirectional transient suppression diode, and the third unidirectional transient suppression diode include at least: SMBJ.

[0014] Optionally, the signal conditioning module at least includes: TEMxxxxCN.

[0015] To achieve the above-mentioned purpose and other related purposes, secondly, the present invention also provides a gate control unit monitoring system, including the gate control unit power supply voltage detection circuit described in any of the above items, the control processing unit is connected to the motor driver of the gate control unit, and the control processing unit adjusts the motor output power in real time according to the power supply voltage of the gate control unit. The gate control unit monitoring system also includes a host computer, which is connected to the control processing unit, and the control processing unit feeds back a detection signal to the host computer.

[0016] To achieve the above objectives and other related objectives, the present invention further provides a method for monitoring a gate control unit, comprising the steps of:

[0017] detecting a power supply voltage of the gate control unit;

[0018] The motor output power of the door control unit is adjusted according to the power supply voltage and a detection signal is fed back.

[0019] Optionally, when the supply voltage is less than a first threshold, the motor output power of the gate control unit is adjusted to zero, and the detection signal is fed back as a first voltage fault signal; when the supply voltage is greater than or equal to the first threshold and less than a second threshold, the motor output power of the gate control unit is lowered, and the detection signal is fed back as a second voltage fault signal; when the supply voltage is greater than or equal to the second threshold and less than or equal to a third threshold, the motor output power of the gate control unit is not adjusted, but the detection signal is fed back as a third voltage fault signal; when the supply voltage is greater than the third threshold, the motor output power of the gate control unit is adjusted to zero, and the detection signal is fed back as a fourth voltage fault signal.

[0020] As described above, the gate control unit power supply voltage detection circuit of the present invention has the following beneficial effects:

[0021] Based on the gate control unit power supply voltage detection circuit, the power supply voltage of the gate control unit can be detected in real time, which is convenient for adjusting the motor output power accordingly according to the real-time power supply voltage, thereby ensuring the normal operation of the gate control unit as much as possible, and promptly feeding back fault signals to the outside world for easy maintenance and protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Shown is a structural diagram of a door control unit monitoring system according to an embodiment of the present invention.

[0023] Figure 2 Shown is a circuit diagram of a voltage divider unit in an embodiment of the present invention.

[0024] Figure 3 Shown is a circuit diagram of a signal conditioning unit according to an embodiment of the present invention.

[0025] Description of Reference Numerals

[0026] R1—first resistor, R2—second resistor, R3—third resistor, R4—fourth resistor, C1—first capacitor, C2—second capacitor, D1—first unidirectional transient suppression diode, D2—second unidirectional transient suppression diode, D3—third unidirectional transient suppression diode, GND—ground, V0—power supply voltage, V1—voltage division sampling voltage, V2—conditioning voltage, VCC—working voltage, U1—signal conditioning module, 11—positive power input terminal of signal conditioning module U1, 12—negative power input terminal of signal conditioning module U1, 13—positive signal input terminal of signal conditioning module U1, 14—negative signal input terminal of signal conditioning module U1, 15—positive signal output terminal of signal conditioning module U1, 11—negative signal output terminal of signal conditioning module U1. DETAILED DESCRIPTION

[0027] As mentioned above in the background technology, although the problems caused by the power supply voltage of the gate control unit in rail transportation are becoming more and more prominent, there is currently no technical solution for power supply voltage detection and corresponding motor output power adjustment.

[0028] Based on this, the present invention proposes a technical solution for monitoring the power supply voltage of the gate control unit: the power supply voltage of the gate control unit is detected in real time through the gate control unit power supply voltage detection circuit, the motor output power is adjusted accordingly according to the real-time power supply voltage to ensure the normal operation of the gate control unit, and the fault signal is promptly fed back to the outside world for maintenance and protection.

[0029] The following describes the embodiments of the present invention through specific examples. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. The present invention may also be implemented or applied through various other specific embodiments, and the details in this specification may be modified or altered based on different viewpoints and applications without departing from the spirit of the present invention.

[0030] See also Figures 1 to 3 . It should be noted that the diagrams provided in this embodiment only illustrate the basic concept of the present invention in a schematic manner, so the diagrams only show the components related to the present invention rather than being drawn according to the number, shape and size of the components during actual implementation. During actual implementation, the type, quantity and proportion of each component can be changed at will, and the component layout type may also be more complicated. The structure, proportion, size, etc. shown in the diagrams attached to this specification are only used to match the content disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which the present invention can be implemented. Therefore, they have no technical significance. Any modification of the structure, change in the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed in the present invention without affecting the efficacy and purpose that can be achieved by the present invention.

[0031] like Figure 1-Figure 3 As shown, the present invention provides a gate control unit power supply voltage detection circuit, which includes:

[0032] The voltage divider unit has an input end connected to the supply voltage V0 of the gate control unit and an output end outputting a divided sampling voltage V1;

[0033] The signal conditioning unit has a signal input terminal connected to the output terminal of the voltage divider unit, and a signal output terminal outputting a conditioned voltage V2;

[0034] The control processing unit has an analog-to-digital conversion port connected to the signal output terminal of the signal conditioning unit, and calculates the power supply voltage V0 of the gate control unit according to the value of the conditioning voltage V2.

[0035] In detail, such as Figure 2As shown, the voltage divider unit includes a first resistor R1 and a second resistor R2. The supply voltage V0 is connected to the ground GND after passing through the first resistor R1 and the second resistor R2 in series. The common end of the first resistor R1 and the second resistor R2 outputs the divided sampling voltage V1.

[0036] Alternatively, as Figure 2 As shown, the voltage divider unit further includes a third resistor R3, a fourth resistor R4, and a first unidirectional transient suppression diode D1. The third resistor R3 and the fourth resistor R4 are respectively connected in parallel with the first resistor R1. The anode of the first unidirectional transient suppression diode D1 is grounded GND, and the cathode of the first unidirectional transient suppression diode D1 is connected to the common end of the first resistor R1 and the second resistor R2.

[0037] In more detail, since the subway power supply voltage V0 is mostly 110V, we divide the 110V into a 5V range that can be detected by the subsequent control processing unit (such as a single-chip microcomputer). Because the voltage detection power is not high, it can be directly divided to 5V through high-precision resistors. The control processing unit mainly detects the divided voltage sampling voltage V1, and then calculates the specific value of the power supply voltage V0 based on the resistance values of the first resistor R1, the second resistor R2, the third resistor R3 and the fourth resistor R4.

[0038] The first resistor R1 , the second resistor R2 , the third resistor R3 and the fourth resistor R4 may be RC1206 chip resistors provided by YAGEO, and the specific resistance values may be flexibly selected according to the voltage divider setting.

[0039] In addition, since the power supply voltage V0 and the power supply voltage (i.e., the operating voltage VCC) of the subsequent control processing unit (such as a single-chip microcomputer) are isolated from each other, signal conditioning is performed after the power supply voltage V0 is divided, and a signal conditioning unit is added accordingly. The signal input, signal output, and power input of the signal conditioning unit are isolated from each other. When the divided sampling voltage V1 fluctuates between 0 and 5V, the output of the signal conditioning unit can also change linearly between 0 and 5V, and the linearity is very high (up to 0.1% FS).

[0040] In detail, such as Figure 3As shown, the signal conditioning unit includes a signal conditioning module U1, a first capacitor C1 and a second capacitor C2. The positive pole 11 of the power input terminal of the signal conditioning module U1 is connected to the working voltage VCC, the negative pole 12 of the power input terminal of the signal conditioning module U1 is grounded GND, the positive pole 13 of the signal input terminal of the signal conditioning module U1 is connected to the divided sampling voltage V1, the negative pole 14 of the signal input terminal of the signal conditioning module U1 is grounded GND, the positive pole 15 of the signal output terminal of the signal conditioning module U1 outputs the conditioned voltage V2, the negative pole 16 of the signal output terminal of the signal conditioning module U1 is grounded GND, one end of the first capacitor C1 is grounded GND, and the other end of the first capacitor C1 is connected to the positive pole 11 of the power input terminal of the signal conditioning module U1, one end of the second capacitor C2 is grounded GND, and the other end of the second capacitor C2 is connected to the positive pole 13 of the signal input terminal of the signal conditioning module U1.

[0041] Alternatively, as Figure 3 As shown, the signal conditioning unit also includes a second unidirectional transient suppression diode D2 and a third unidirectional transient suppression diode D3. The anode of the second unidirectional transient suppression diode D2 is grounded GND, and the cathode of the second unidirectional transient suppression diode D2 is connected to the positive power input terminal 11 of the signal conditioning module U1. The anode of the third unidirectional transient suppression diode D3 is grounded GND, and the cathode of the third unidirectional transient suppression diode D3 is connected to the positive signal output terminal 15 of the signal conditioning module U1.

[0042] In more detail, Figure 3 As shown, the signal conditioning unit conditions the input divided voltage sampling voltage V1 to obtain a conditioned voltage V2, V2=V1; optionally, the first unidirectional transient suppression diode D1, the second unidirectional transient suppression diode D2 and the third unidirectional transient suppression diode D3 may at least include SMBJ series chip capacitors provided by ST (STMicroelectronics). The SMBJ series adopts advanced GPP glass passivation process, has a peak pulse power of 600W, a package form SMB / DO-214AA, and an operating voltage range of 5.0-440V. It is widely used in power supply and signal interface protection in consumer electronics, automotive electronics, industrial control, network communications and new energy fields; the signal conditioning module U1 may at least include the TEMxxxxCN series signal conditioning module provided by Jinshengyang. The TEMxxxxCN series is an active isolation module with millivolt-level positive and negative voltage signal input and post-stage positive and negative voltage signal output. A high-efficiency micro-power power supply is embedded in the module to power the internal circuit of the product. Due to the internal use of electromagnetic isolation technology, it has better temperature drift characteristics and linearity than optocoupler isolation, and has low power consumption and small ripple.

[0043] The conditioned voltage V2 output by the signal conditioning unit is transmitted to the analog-to-digital conversion port of the control processing unit. The control processing unit converts the obtained code value into a voltage value and calculates the supply voltage V0 based on the voltage value.

[0044] Based on the above-mentioned gate control unit power supply voltage detection circuit, the present invention also provides a gate control unit monitoring system, such as Figure 1 As shown, it includes the above-mentioned gate control unit power supply voltage detection circuit, the control processing unit is connected to the motor driver of the gate control unit, and the control processing unit also adjusts the motor output power in real time according to the power supply voltage V0 of the gate control unit. The gate control unit monitoring system also includes a host computer, which is connected to the control processing unit, and the control processing unit also feeds back a detection signal to the host computer.

[0045] Among them, the working principle of the door control unit monitoring system is as follows: when the detected real-time power supply voltage V0 is less than the first threshold, the motor output power of the door control unit is adjusted to zero, and the feedback detection signal is a first voltage fault signal, that is, the power supply voltage V0 is too low to meet the operating door opening and closing time, and the door opening or closing is directly stopped; when the detected real-time power supply voltage V0 is greater than or equal to the first threshold and less than the second threshold, the motor output power of the door control unit is lowered, and the feedback detection signal is a second voltage fault signal, that is, the power supply voltage V0 is low but meets the operating door opening and closing time. , reduce the power and continue to open or close the door; when the detected real-time supply voltage V0 is greater than or equal to the second threshold and less than or equal to the third threshold, the motor output power of the door control unit is not adjusted, but the feedback detection signal is the third voltage fault signal, that is, when the supply voltage V0 is too high, the motor output power is not changed, and the door continues to be opened or closed; when the detected real-time supply voltage V0 is greater than the third threshold, the motor output power of the door control unit is adjusted to zero, and the feedback detection signal is the fourth voltage fault signal, that is, when the supply voltage V0 is too high, it affects and damages the motor, and directly stops opening or closing the door.

[0046] At the same time, if Figure 1 As shown, corresponding to the above-mentioned door control unit monitoring system, the present invention also provides a door control unit monitoring method, including the steps of:

[0047] S1, detect the power supply voltage V0 of the gate control unit;

[0048] S2. Adjust the motor output power of the door control unit according to the power supply voltage V0 and feed back the detection signal.

[0049] In detail, in step S2, when the power supply voltage V0 is less than the first threshold value, the motor output power of the gate control unit is adjusted to zero, and the feedback detection signal is a first voltage fault signal; when the power supply voltage V0 is greater than or equal to the first threshold value and less than the second threshold value, the motor output power of the gate control unit is lowered, and the feedback detection signal is a second voltage fault signal; when the power supply voltage V0 is greater than or equal to the second threshold value and less than or equal to the third threshold value, the motor output power of the gate control unit is not adjusted, but the feedback detection signal is a third voltage fault signal; when the power supply voltage V0 is greater than the third threshold value, the motor output power of the gate control unit is adjusted to zero, and the feedback detection signal is a fourth voltage fault signal.

[0050] The aforementioned door control unit monitoring system and method can detect the input power supply voltage V0 in real time and calculate and adjust the motor's operating state based on the collected value. When the power supply voltage V0 decreases slightly, the motor's output power and door opening and closing speed are appropriately reduced, while maintaining the required operating time. This ensures the normal operation of the door control unit. When the power supply voltage V0 increases slightly, the motor's output power and door opening and closing speed remain unchanged, ensuring normal operation of the door control unit. When the power supply voltage V0 decreases or increases significantly, the motor is directly shut down. Furthermore, a detection signal is provided as feedback, significantly reducing the possibility of misjudgment and providing clear information about the fault (e.g., if the power supply voltage V0 decreases by more than a specified value), saving significant time in troubleshooting.

[0051] To sum up, in the gate control unit power supply voltage detection circuit, gate control unit monitoring system and method provided by the present invention, the gate control unit power supply voltage detection circuit can detect the power supply voltage of the gate control unit in real time, and then adjust the motor output power accordingly according to the real-time power supply voltage, especially when the power supply voltage is low but meets the operating door opening and closing time, the motor output power is appropriately reduced, which reduces the probability of misjudgment and can effectively ensure the normal operation of the gate control unit; at the same time, the fault signal is fed back to the outside world, and the specific fault information can be clearly viewed, saving the time and manpower costs of fault investigation and facilitating maintenance and protection.

[0052] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed herein are intended to be covered by the claims of the present invention.

Claims

1. A gate control unit power supply voltage detection circuit, characterized in that: include: A voltage dividing unit, the input end of which is connected to the supply voltage of the gate control unit, and the output end of which outputs the divided sampling voltage; A signal conditioning unit, wherein the signal input terminal is connected to the output terminal of the voltage divider unit, and the signal output terminal outputs a conditioned voltage; a control processing unit, wherein the analog-to-digital conversion port of the control processing unit is connected to the signal output terminal of the signal conditioning unit and the power supply voltage of the gate control unit is calculated according to the value of the conditioning voltage; In which, the signal conditioning unit includes a signal conditioning module, a first capacitor and a second capacitor. The positive pole of the power input terminal of the signal conditioning module is connected to the working voltage, the negative pole of the power input terminal of the signal conditioning module is grounded, the positive pole of the signal input terminal of the signal conditioning module is connected to the voltage-divided sampling voltage, the negative pole of the signal input terminal of the signal conditioning module is grounded, the positive pole of the signal output terminal of the signal conditioning module outputs the conditioning voltage, the negative pole of the signal output terminal of the signal conditioning module is grounded, one end of the first capacitor is grounded, and the other end of the first capacitor is connected to the positive pole of the power input terminal of the signal conditioning module, one end of the second capacitor is grounded, and the other end of the second capacitor is connected to the positive pole of the signal input terminal of the signal conditioning module.

2. The gate control unit power supply voltage detection circuit according to claim 1, characterized in that: The voltage dividing unit includes a first resistor and a second resistor. The supply voltage is connected to the ground after passing through the first resistor and the second resistor connected in series. The common end of the first resistor and the second resistor outputs the divided sampling voltage.

3. The gate control unit power supply voltage detection circuit according to claim 2, characterized in that: The voltage divider unit further includes a third resistor, a fourth resistor, and a first unidirectional transient suppression diode. The third resistor and the fourth resistor are respectively connected in parallel with the first resistor. The anode of the first unidirectional transient suppression diode is grounded, and the cathode of the first unidirectional transient suppression diode is connected to the common end of the first resistor and the second resistor.

4. The gate control unit power supply voltage detection circuit according to claim 3, characterized in that: The signal conditioning unit also includes a second unidirectional transient suppression diode and a third unidirectional transient suppression diode. The anode of the second unidirectional transient suppression diode is grounded, and the cathode of the second unidirectional transient suppression diode is connected to the positive pole of the power input terminal of the signal conditioning module. The anode of the third unidirectional transient suppression diode is grounded, and the cathode of the third unidirectional transient suppression diode is connected to the positive pole of the signal output terminal of the signal conditioning module.

5. The gate control unit power supply voltage detection circuit according to claim 4, characterized in that: The first unidirectional transient suppression diode, the second unidirectional transient suppression diode, and the third unidirectional transient suppression diode at least include: SMBJ.

6. The gate control unit power supply voltage detection circuit according to claim 4 or 5, characterized in that: The signal conditioning module at least includes: TEMxxxxCN.

7. A door control unit monitoring system, characterized in that: The gate control unit monitoring system includes a gate control unit power supply voltage detection circuit according to any one of claims 1 to 6, wherein the control processing unit is connected to the motor driver of the gate control unit, and the control processing unit adjusts the motor output power in real time according to the power supply voltage of the gate control unit. The gate control unit monitoring system also includes a host computer, which is connected to the control processing unit, and the control processing unit feeds back a detection signal to the host computer.

8. A method for monitoring a door control unit, characterized in that: Applied to the gate control unit power supply voltage detection circuit according to any one of claims 1 to 6, the method comprises the steps of: detecting a power supply voltage of the gate control unit; The motor output power of the door control unit is adjusted according to the power supply voltage and a detection signal is fed back.

9. The door control unit monitoring method according to claim 8, characterized in that: When the supply voltage is less than a first threshold, the motor output power of the gate control unit is adjusted to zero, and the detection signal is fed back as a first voltage fault signal; when the supply voltage is greater than or equal to the first threshold and less than a second threshold, the motor output power of the gate control unit is lowered, and the detection signal is fed back as a second voltage fault signal; when the supply voltage is greater than or equal to the second threshold and less than or equal to the third threshold, the motor output power of the gate control unit is not adjusted, but the detection signal is fed back as a third voltage fault signal; when the supply voltage is greater than the third threshold, the motor output power of the gate control unit is adjusted to zero, and the detection signal is fed back as a fourth voltage fault signal.

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