Analog load device compatible with rail transit drive collection

Abstract

The application relates to the technical field of rail transit technology, and discloses a compatible analog load device for rail transit driving and collection, which comprises a bus connection positive end and a bus connection negative end, the input ends of the bus connection positive end and the bus connection negative end are connected with a driving control module or a collection input module, the output end of the bus connection positive end is connected with a current monitoring module and a voltage monitoring module respectively, the current monitoring module and the voltage monitoring module are connected with a control unit, an analog driving output circuit and an analog collection input circuit respectively, the voltage monitoring module is also connected with the bus connection negative end, the control unit is connected with a relay control module, and the relay control module is connected with the analog driving output circuit and the analog collection input circuit respectively. The loop of driving and collection can be cut off, and the driving control module is protected.

Description

Technical Field

[0001] This invention relates to the field of rail transit technology, specifically to a simulated load device compatible with rail transit drive acquisition. Background Technology

[0002] Drive output modules and data acquisition input modules are crucial control modules in the rail transit field, with a wide range of applications. Existing drive loads are primarily gravity-type relays. These relays are not only large and difficult to install and carry, but their coil voltages also vary between 24V DC and 110V DC, requiring frequent relay replacements when the drive module needs to adapt to different types, which is very inconvenient. Furthermore, traditional gravity-type relay loads cannot monitor their drive voltage and current in real time when the relay is controlled, lacking intelligent feedback. When overvoltage, overcurrent, or short-circuit faults occur in the output circuit, they cannot take appropriate protective actions, easily damaging the drive module or power supply equipment. As for data acquisition modules, while existing load power supplies can display voltage and input current, their monitoring of the acquired current is not intelligent enough, and their overcurrent protection thresholds are usually quite high, failing to accurately protect the data acquisition module. Summary of the Invention

[0003] The purpose of this invention is to overcome the existing defects and provide a simulated load device compatible with rail transit drive acquisition, which can disconnect the drive and acquisition circuits and protect the drive control module.

[0004] The technical solution to achieve the above objectives is:

[0005] A simulated load device compatible with rail transit drive acquisition includes a positive bus connection terminal and a negative bus connection terminal. The input terminals of the positive and negative bus connection terminals are connected to a drive control module or an acquisition input module. The output terminal of the positive bus connection terminal is connected to a current monitoring module and a voltage monitoring module, respectively. The current monitoring module and the voltage monitoring module are each connected to a control unit, an analog drive output circuit, and an analog acquisition input circuit, respectively. The voltage monitoring module is also connected to the negative bus connection terminal. The control unit is connected to a relay control module, which is connected to both the analog drive output circuit and the analog acquisition input circuit.

[0006] Preferably, the analog drive output circuit includes a first relay and a second relay, the first relay is connected to a first relay coil, the second relay is connected to a second relay coil, the first relay coil is connected to a first drive load circuit, the second relay coil is connected to a second drive load circuit, the current monitoring module is connected to the first relay coil and the second relay coil, and the relay control module is connected to the first relay and the second relay.

[0007] Preferably, the first drive load circuit includes a first diode.

[0008] The anode of the first diode is connected to the coil of the first relay, and the cathode of the first diode is connected to the first resistor;

[0009] The first resistor is connected to the second resistor and the cathode of the first Zener diode, respectively;

[0010] The second resistor is connected to the input terminal of the first optocoupler, and the output terminal of the first optocoupler is connected to the seventh resistor and the third resistor respectively;

[0011] The anode of the first Zener diode is connected to the seventh resistor, and the other end of the seventh resistor is connected to the coil of the first relay.

[0012] The third resistor is connected to the first light-emitting diode, and the other end of the first light-emitting diode is grounded.

[0013] Preferably, the second drive load circuit includes: a second diode,

[0014] The anode of the second diode is connected to the coil of the second relay, and the cathode of the second diode is connected to the fourth resistor;

[0015] The fourth resistor is connected to the cathode of the fifth resistor and the second Zener diode, respectively;

[0016] The fifth resistor is connected to the input terminal of the second optocoupler, and the output terminal of the second optocoupler is connected to the eighth resistor and the sixth resistor respectively;

[0017] The anode of the second Zener diode is connected to the eighth resistor, and the other end of the eighth resistor is connected to the coil of the second relay.

[0018] The sixth resistor is connected to the second light-emitting diode, and the other end of the second light-emitting diode is grounded.

[0019] Preferably, the analog acquisition input circuit includes: a third relay and a fourth relay, the third relay being connected to a third relay coil, the fourth relay being connected to a fourth relay coil, the third relay coil and the fourth relay coil being respectively connected to the positive terminal and the negative terminal of the power input, the positive terminal and the negative terminal of the power input being connected to the acquisition power supply, the current monitoring module being connected to the third relay coil and the fourth relay coil, and the relay control module being connected to the third relay and the fourth relay.

[0020] Preferably, it also includes a power supply voltage, which is connected to the first relay, the second relay, the third relay and the fourth relay respectively, and the other end of the coils of the first relay, the second relay, the third relay and the fourth relay is grounded.

[0021] The beneficial effects of this invention are as follows: By connecting to the drive output module and the acquisition input module, this invention simulates the load of the drive and acquisition modules, and can monitor the drive output voltage and drive current, and acquire the input voltage and acquisition current. When the current exceeds the threshold or the voltage is too high, the output circuit can be effectively cut off to protect the drive control module and the load device. The sampling resistors, the first resistor, the fourth resistor, the seventh resistor, and the eighth resistor, can be adjusted to control the magnitude of the output current. It can simulate the situation where the current of the drive output control module is too low or too current. The fully electronic integrated circuit is inexpensive, has high economic value, and the load is small in size and easy to install. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of a simulated load device compatible with rail transit drive acquisition according to the present invention. Detailed Implementation

[0023] The technical solution of the present invention will now be clearly and completely described in conjunction with the accompanying drawings. In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] The invention will now be further described with reference to the accompanying drawings.

[0025] like Figure 1As shown, a simulated load device compatible with rail transit drive acquisition includes a positive bus connection P and a negative bus connection N. The input terminals of the positive bus connection P and the negative bus connection N are connected to a drive control module or an acquisition input module. The output terminal of the positive bus connection P is connected to a current monitoring module ACQ1 and a voltage monitoring module ACQ2, respectively. Both the current monitoring module ACQ1 and the voltage monitoring module ACQ2 are connected to a control unit MCU, an analog drive output circuit, and an analog acquisition input circuit, respectively. The voltage monitoring module ACQ2 is also connected to the negative bus connection N. The control unit MCU is connected to a relay control module RCM, and the relay control module RCM is connected to both the analog drive output circuit and the analog acquisition input circuit. The current monitoring module ACQ1... CQ1 primarily samples the driving or acquiring current, and monitors and compares the current according to a set threshold. When the current is too high, it controls the first relay SSR1, the second relay SSR2, the third relay SSR3, and the fourth relay SSR4 to disconnect the corresponding first relay coil K1, second relay coil K2, third relay coil K3, and fourth relay coil K4. The voltage monitoring module ACQ2 samples and analyzes the driving or acquiring voltage. When the voltage is too low or too high, it allows the MCU to provide corresponding feedback. The relay control module RCM is used to open or close the circuit, requiring the corresponding first relay SSR1, second relay SSR2, third relay SSR3, or fourth relay SSR4 to be engaged or disengaged.

[0026] In this embodiment, the analog drive output circuit includes a first relay SSR1, a second relay SSR2, a first relay coil K1, and a second relay coil K2. The relay control module RCM is connected to the first relay SSR1 and the second relay SSR2. The current monitoring module ACQ1 is connected to the first relay coil K1 and the second relay coil K2. The other end of the first relay SSR1 is connected to the first relay coil K1, the other end of the second relay SSR2 is connected to the second relay coil K2, the other end of the first relay coil K1 is connected to the first drive load circuit, and the other end of the second relay coil K2 is connected to the second drive load circuit.

[0027] In this embodiment, the first driving load circuit includes a first diode D1, the anode of which is connected to the first relay coil K1, and the cathode of which is connected to a first resistor R1; the first resistor R1 is connected to the cathode of a second resistor R2 and a first Zener diode D2; the second resistor R2 is connected to the input terminal of a first optocoupler D3, and the output terminal of the first optocoupler D3 is connected to a seventh resistor R7 and a third resistor R3; the anode of the first Zener diode D2 is connected to the seventh resistor R7, and the other end of the seventh resistor R7 is connected to the first relay coil K1; the third resistor R3 is connected to a first light-emitting diode D4, and the other end of the first light-emitting diode D4 is grounded.

[0028] In this embodiment, the second driving load circuit includes: a second diode D5, the anode of the second diode D5 being connected to the second relay coil K2, and the cathode of the second diode D5 being connected to the fourth resistor R4; the fourth resistor R4 being connected to the cathode of the fifth resistor R5 and the second Zener diode D6; the fifth resistor R5 being connected to the input terminal of the second optocoupler D7, and the output terminal of the second optocoupler D7 being connected to the eighth resistor R8 and the sixth resistor R6; the anode of the second Zener diode D6 being connected to the eighth resistor R8, and the other end of the eighth resistor R8 being connected to the second relay coil K2; and the sixth resistor R6 being connected to the second light-emitting diode D8, the other end of which is grounded.

[0029] The analog acquisition input circuit includes: a third relay SSR3, a fourth relay SSR4, a third relay coil K3, and a fourth relay coil K4. The relay control module RCM is connected to the third relay SSR3 and the fourth relay SSR4, and the current monitoring module ACQ1 is connected to the third relay coil K3 and the fourth relay coil K4. The other end of the third relay SSR3 is connected to the third relay coil K3, and the other end of the fourth relay SSR4 is connected to the fourth relay coil K4. The other ends of the third relay coil K3 and the fourth relay coil K4 are respectively connected to the positive power input terminal IN+ and the negative power input terminal IN-. The positive power input terminal IN+ and the negative power input terminal IN- are connected to the acquisition power supply.

[0030] In this embodiment, the first relay SSR1, the second relay SSR2, the third relay SSR3, and the fourth relay SSR4 are interlocked with the first relay coil K1, the second relay coil K2, the third relay coil K3, and the fourth relay coil K4, respectively, to ensure that only one relay coil can be engaged at any given time.

[0031] In this embodiment, a power supply voltage VCC is also included. The power supply voltage VCC is connected to the first relay SSR1, the second relay SSR2, the third relay SSR3 and the fourth relay SSR4 respectively. The other ends of the first relay coil K1, the second relay coil K2, the third relay coil K3 and the fourth relay coil K4 are grounded.

[0032] When this circuit is used as a drive output load, the input terminals of the bus connection positive terminal P and the bus connection negative terminal N are connected to the drive control module. The drive control module outputs a drive voltage. After passing through the voltage detection circuit of the bus connection positive terminal P and the bus connection negative terminal N, the potential difference can be determined. If the voltage of the bus connection positive terminal P is greater than the voltage of the bus connection negative terminal N, the control unit MUC drives the first relay SSR1, energizing the positive output first relay coil K1, and the first LED D4 in its first drive load circuit is lit. If the voltage of the bus connection positive terminal P is less than the voltage of the bus connection negative terminal N, the control unit MUC drives the second relay SSR2, energizing the positive output second relay coil K2, and the second LED D8 in its second drive load circuit is lit. This process is the drive output process. This process can collect and monitor the drive current. When the current is too high, the first relay SSR1 or the second relay SSR2 can be disconnected to protect the drive control module and the power supply equipment.

[0033] When this circuit is used to acquire analog loads, the positive terminal P and the negative terminal N of the bus connection are connected to the acquisition input module. The positive terminal IN+ and the negative terminal IN- of the power input are connected to the acquisition power supply. When the control unit MUC drives the third relay SSR3, the positive acquisition third relay coil K3 is activated, acquiring the power supply input voltage. At this time, the current detection circuit detects the current input current. If the current is within the normal value, the acquisition analog load is working normally. If the current is too low, the third relay SSR3 needs to be turned off, the third relay coil K3 needs to be disconnected, and the fourth relay SSR4 needs to be turned on, activating the reverse input fourth relay coil K4. At this time, the acquisition current value is read, and the current acquisition analog load usage status can be confirmed by judging the acquisition current. This process is the analog acquisition input function process, which can achieve real-time monitoring of the load current. When the current is too high, the third relay SSR3 and the fourth relay SSR4 can be disconnected to protect the acquisition analog load and the power supply equipment.

[0034] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A simulated load device compatible with rail transit drive acquisition, comprising a positive bus connection (P) and a negative bus connection (N), wherein the input terminals of the positive bus connection (P) and the negative bus connection (N) are connected to a drive control module or an acquisition input module, characterized in that, The output terminal of the positive terminal (P) of the bus connection is connected to the current monitoring module (ACQ1) and the voltage monitoring module (ACQ2) respectively. The current monitoring module (ACQ1) and the voltage monitoring module (ACQ2) are each connected to the control unit (MCU), the analog drive output circuit and the analog acquisition input circuit respectively. The voltage monitoring module (ACQ2) is also connected to the negative terminal (N) of the bus connection. The control unit (MCU) is connected to the relay control module (RCM). The relay control module (RCM) is connected to the analog drive output circuit and the analog acquisition input circuit respectively. The analog drive output circuit includes a first relay (SSR1) and a second relay (SSR2). The first relay (SSR1) is connected to a first relay coil (K1), and the second relay (SSR2) is connected to a second relay coil (K2). The first relay coil (K1) is connected to a first drive load circuit, and the second relay coil (K2) is connected to a second drive load circuit. The current monitoring module (ACQ1) is connected to the first relay coil (K1) and the second relay coil (K2). The relay control module (RCM) is connected to the first relay (SSR1) and the second relay (SSR2). The analog acquisition input circuit includes a third relay (SSR3) and a fourth relay (SSR4). The third relay (SSR3) is connected to the third relay coil (K3), and the fourth relay (SSR4) is connected to the fourth relay coil (K4). The third relay coil (K3) and the fourth relay coil (K4) are respectively connected to the positive terminal (IN+) and the negative terminal (IN-) of the power input. The positive terminal (IN+) and the negative terminal (IN-) of the power input are connected to the acquisition power supply. The current monitoring module (ACQ1) is connected to the third relay coil (K3) and the fourth relay coil (K4), and the relay control module (RCM) is connected to the third relay (SSR3) and the fourth relay (SSR4).

2. The simulated load device compatible with rail transit drive acquisition according to claim 1, characterized in that, The first drive load circuit includes a first diode (D1). The anode of the first diode (D1) is connected to the coil of the first relay (K1), and the cathode of the first diode (D1) is connected to the first resistor (R1). The first resistor (R1) is connected to the second resistor (R2) and the cathode of the first Zener diode (D2); The second resistor (R2) is connected to the input terminal of the first optocoupler (D3), and the output terminal of the first optocoupler (D3) is connected to the seventh resistor (R7) and the third resistor (R3) respectively. The anode of the first Zener diode (D2) is connected to the seventh resistor (R7), and the other end of the seventh resistor (R7) is connected to the coil of the first relay (K1). The third resistor (R3) is connected to the first light-emitting diode (D4), and the other end of the first light-emitting diode (D4) is grounded.

3. The simulated load device compatible with rail transit drive acquisition according to claim 1, characterized in that, The second drive load circuit includes: a second diode (D5). The anode of the second diode (D5) is connected to the coil of the second relay (K2), and the cathode of the second diode (D5) is connected to the fourth resistor (R4). The fourth resistor (R4) is connected to the cathode of the fifth resistor (R5) and the second Zener diode (D6); The fifth resistor (R5) is connected to the input terminal of the second optocoupler (D7), and the output terminal of the second optocoupler (D7) is connected to the eighth resistor (R8) and the sixth resistor (R6) respectively. The anode of the second Zener diode (D6) is connected to the eighth resistor (R8), and the other end of the eighth resistor (R8) is connected to the second relay coil (K2). The sixth resistor (R6) is connected to the second light-emitting diode (D8), and the other end of the second light-emitting diode (D8) is grounded.

4. The simulated load device compatible with rail transit drive acquisition according to claim 1, characterized in that, It also includes a power supply voltage (VCC), which is connected to the first relay (SSR1), the second relay (SSR2), the third relay (SSR3), and the fourth relay (SSR4), respectively. The other end of the coils of the first relay (K1), the second relay (K2), the third relay (K3), and the fourth relay (K4) is grounded.

Images