Anti-slowness alarm device for locomotive driving wheel

Abstract

A locomotive driving wheel anti-slowness alarm device comprises a main shell internally provided with a host, the main shell is provided with connecting terminals connected with the host, and the connecting terminals comprise a speed acquisition terminal, a pressure acquisition terminal, a power supply terminal and a handle position terminal; the speed acquisition terminal, the pressure acquisition terminal and the handle position terminal are respectively connected with a speed detection loop, a pressure switch detection loop and a handle position detection loop; the speed detection loop, the pressure switch detection loop and the handle position detection loop are respectively connected with a signal input end of the host; the signal output end of the host is connected with a voice loop. The utility model discloses an anti-slowness alarm device for a locomotive driving wheel, which can collect the braking state of a locomotive, send out an alarm signal when the braking distance of the locomotive exceeds a set value and remind a worker, is convenient to use and high in integration level, and only needs to connect a main shell with the locomotive and connect a voice shell on the main shell. And the safety of the locomotive in the running process is effectively ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field, and in particular relates to a locomotive driving wheel anti-delay alarm device. Background Art

[0002] Most locomotive wheels consist of two parts: a wheel rim and a tire. These are tightly fastened together using an interference fit, either by shrinking or cold pressing. If the wheel rim and rim, which generate traction, experience relative displacement, this is called wheel slack. Wheel slack often occurs during locomotive operation, posing a potential safety hazard. During locomotive operation, the speed change after braking is minimal, making it difficult to detect, leading to wheel slack. If wheel slack occurs during locomotive operation, it indicates friction between the wheel rim and the wheel center, potentially changing the wheel spacing at any time. Once the wheel spacing changes, a serious accident could occur, such as the locomotive derailing or even overturning.

[0003] Patent document CN 212890362 U describes a driving wheel anti-sluggishness device suitable for GK1C locomotives. This device utilizes the existing locomotive control system, including a power supply, a proximity switch SQ, an operator control unit ADS, an intermediate relay KA, an alarm 1 (HA), and an alarm 2 (HLL). The proximity switch SQ is connected to the positive and negative poles of the power supply, with its output connected to the operator control unit ADS. The other end of the operator control unit ADS is connected to the coil of the intermediate relay KA, which in turn is connected to the positive pole of the power supply. One end of the normally open contact of the intermediate relay KA is connected to the Y16 port of the locomotive control system, and the other end is connected in series with the alarm 2 (HLL) and the alarm 1 (HA), and then to the positive pole of the power supply. The output power supply interface COM4 is connected to the negative pole of the power supply. This device can emit an audible and visual alarm when the locomotive is operating with the brake engaged, loaded, or at a speed greater than a set value. It does not sound an alarm during operations such as warming up the locomotive, performing a loading test, coasting, or starting from a stop, thus preventing frequent false alarms.

[0004] This solution can trigger an alarm when the locomotive is running with brakes engaged due to reasons such as forgetting to release the handbrake, brake failure, or misoperation, prompting the driver to take measures to avoid the loosening of the driving wheels caused by prolonged operation with the brakes engaged. At the same time, this solution utilizes the original locomotive control system of the GK1C locomotive, reducing the difficulty of modification and improving its efficiency.

[0005] However, this solution can only issue an alarm when the locomotive is running with the brakes on, and is not sufficient to issue an alarm when the locomotive's driving wheels are slow. Utility Model Content

[0006] The utility model aims to provide a locomotive driving wheel anti-delay alarm device with simple structure and good use effect.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0008] The locomotive driving wheel anti-delay alarm device includes a main housing with a host computer inside, and the main housing is provided with connection terminals connected to the host computer, and the connection terminals include a speed acquisition terminal, a pressure acquisition terminal, a power supply terminal and a handle position terminal;

[0009] The power terminal is connected to the locomotive power supply, and the power terminal is connected to a power circuit, which provides power to the device;

[0010] The speed acquisition terminal, pressure acquisition terminal and handle position terminal are respectively connected to the speed detection circuit, the pressure switch detection circuit and the handle position detection circuit;

[0011] The speed detection circuit, the pressure switch detection circuit and the handle position detection circuit are respectively connected to the signal input terminal of the host;

[0012] The signal output terminal of the host is connected to a voice loop.

[0013] It also includes a voice shell, a voice circuit is located in the voice shell, and the voice circuit includes a voice chip and a power amplifier chip; the host outputs a signal to the voice chip, the signal output end of the voice chip is connected to the power amplifier chip, the power amplifier chip is connected to a built-in speaker, and the built-in speaker is located on the voice shell.

[0014] A first voice terminal is reserved on the main shell, and the first voice terminal is connected to the signal output end of the host. A second voice terminal is reserved on the voice shell, and the second voice terminal is connected to the signal input end of the voice chip. The first voice terminal and the second voice terminal are connected.

[0015] The host is also connected to a display circuit, which includes a display screen, which is set on the main shell; the signal input end of the display screen is connected to the signal output end of the host; the LED-interface of the display screen is grounded through a fourth grounding resistor, and at the same time, a field effect tube is connected to the LED-interface of the display screen, and the source of the field effect tube is connected to the LED-interface of the display screen; the drain of the field effect tube is grounded, and the drain of the field effect tube is connected to the gate of the field effect tube through a seventh connection resistor.

[0016] The speed detection circuit includes a first operational amplifier, a second operational amplifier and a first optocoupler, and the speed acquisition terminal is connected in sequence with a first diode and a first connection resistor; the first connection resistor is connected to the inverting input of the first operational amplifier, the non-inverting input of the first operational amplifier is grounded, the output of the first operational amplifier is connected to the non-inverting input of the second operational amplifier, the inverting input of the second operational amplifier is connected to the output of the second operational amplifier, the output of the second operational amplifier is connected to the input of the first optocoupler, and the output of the first optocoupler is connected to the signal input of the host.

[0017] The pressure switch detection circuit includes a second optocoupler, and the pressure collection terminal includes a first pressure collection terminal and a second pressure collection terminal. The DC power supply is connected to the first pressure collection terminal through a fourth connection resistor, and the second pressure collection terminal is grounded; at the same time, the first pressure collection terminal is connected to the positive input end of the second optocoupler through a first light-emitting diode, and the output end of the second optocoupler is connected to the signal input end of the host; the negative input end of the second optocoupler is also grounded through a second grounding resistor and a first grounding capacitor connected in parallel; at the same time, the second input end of the second optocoupler is grounded through a first voltage regulator tube.

[0018] The handle position terminal includes the handle zero position terminal and the handle low position terminal;

[0019] The handle position detection circuit includes a fifth connection resistor, a sixth connection resistor, a second light-emitting diode, a second voltage-stabilizing diode and a third optocoupler; the handle zero-position terminal is connected to the positive input end of the third optocoupler through the fifth connection resistor, the sixth connection resistor and the second light-emitting diode in sequence; the handle low-position terminal is connected to the negative input end of the third optocoupler through the second voltage-stabilizing diode, and the output end of the third optocoupler is connected to the signal input end of the host; a third grounding resistor and a second grounding capacitor are connected in parallel between the handle zero-position terminal and the handle low-position terminal.

[0020] The power supply circuit includes a first power conversion chip, a fuse, a first voltage stabilizing chip, a bidirectional voltage stabilizing diode and a plurality of filter capacitors;

[0021] The power terminal is connected to the input end of the first power conversion chip through a fuse, and the bidirectional voltage regulator diode is connected between the input end and the ground end of the first power conversion chip; the filter circuit is connected between the positive output end and the negative output end of the first power conversion chip; the positive output end of the first power conversion chip outputs 15V DC power, the positive output end of the first power conversion chip is connected to the input end of the first voltage regulator chip, and the output end of the first voltage regulator chip outputs 12V DC power.

[0022] The power supply circuit can also provide 5V DC power. The power supply circuit also includes a second power conversion chip. The input end of the second power conversion chip is connected to 15V DC power, and the output end thereof outputs 5V DC power.

[0023] A button group is also provided on the main shell, which includes a setting button, an increase button, a position selection button and a confirmation button. The first ends of the setting button, the increase button, the position selection button and the confirmation button are connected to a DC power supply. At the same time, the first ends of the setting button, the increase button, the position selection button and the confirmation button are also connected to the signal input end of the host, and the second ends of the setting button, the increase button, the position selection button and the confirmation button are grounded.

[0024] Through the above technical solutions, the technical effects of the utility model are as follows: 1. The present application discloses a locomotive driving wheel anti-delay alarm device, which can collect the braking status of the locomotive. When the braking distance of the locomotive exceeds the set value, an alarm signal is issued to remind the staff. It is easy to use and has a high degree of integration. It only needs to connect the main shell to the locomotive and connect the voice shell to the main shell, which effectively ensures the safety of the locomotive during driving. 2. The set display circuit can display the locomotive operating status, making the locomotive operation process more intuitive. 3. The connection terminals on the main shell are connected to external devices through aviation plugs, which makes the connection more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the structure of the utility model;

[0026] Figure 2 This is the circuit schematic diagram of the utility model;

[0027] Figure 3 It is the speed detection circuit;

[0028] Figure 4 It is a pressure detection circuit;

[0029] Figure 5 It is the handle position detection circuit;

[0030] Figure 6 For the power supply circuit;

[0031] Figure 7 For the speech loop;

[0032] Figure 8 For the button circuit;

[0033] Figure 9 This is the circuit schematic diagram of Example 2;

[0034] Figure 10 This is the circuit schematic diagram of Example 3. DETAILED DESCRIPTION

[0035] In Example 1, a locomotive wheel anti-sluggishness alarm device detects braking speed and calculates braking distance, thereby determining whether the locomotive's wheels are experiencing sluggishness. This device determines whether the locomotive's braking distance is within a set distance. If the set distance is exceeded, it indicates sluggishness. This device issues an alarm signal to alert personnel when a locomotive wheel is experiencing sluggishness, allowing them to troubleshoot the problem based on the alarm signal and avoid further accidents.

[0036] This machine's driving wheel anti-delay alarm device, such as Figure 1 and Figure 2As shown, it includes a main shell 1, and a host U1 is arranged in the main shell 1, wherein the host U1 includes a single-chip microcomputer of model STC8H8K64U-45I-LQFP64. In this embodiment, in order to ensure the operation of the single-chip microcomputer, a minimum circuit is connected to the single-chip microcomputer, which is a mature existing technology. This embodiment does not involve improvements to this part, so this part will not be repeated here.

[0037] The main housing 1 is provided with connection terminals for connecting to the main unit U1. These terminals are used to connect to external devices, including speed acquisition terminals, pressure acquisition terminals, power terminals, and handle position terminals. These terminals are combined into a 13-pin aviation plug, which is used for external connection, improving the convenience of the connection process. The aviation plug is located as follows: The aviation plug has terminals A, B, D, E, J, N, P, R, F, M, L, H, and C. Terminals A and B are power terminals; D and E are handle position terminals; J, N, P, and R are voice terminals; F and M are pressure acquisition terminals; and L, H, and C are speed acquisition terminals. The external devices in this embodiment are: the speed sensor, the pressure switch, the locomotive power port, and the handle position port. The locomotive power port directly outputs 110V DC power, which provides the locomotive's operating power supply.

[0038] The speed detection circuit, pressure switch detection circuit, and handle position detection circuit are connected to the speed acquisition terminal, pressure acquisition terminal, and handle position detection circuit, respectively. The power terminal is connected to the power circuit, which provides power to the device. The speed detection circuit, pressure switch detection circuit, and handle position detection circuit are connected to the signal input terminal of the host computer.

[0039] The speed acquisition terminal receives the speed signal and transmits the received speed signal to the host; the pressure switch detection circuit receives the pressure switch signal and transmits the received pressure switch signal to the host; the handle position terminal receives the handle position signal and transmits the received handle position information to the host.

[0040] The power supply circuit, speed detection circuit, pressure switch detection circuit and handle position detection circuit are described in detail as follows:

[0041] The power supply circuit is used to provide power to the device, such as Figure 6 As shown, the power supply circuit includes a first power conversion chip (model URB1D15YMD-10WR3) U7, a fuse F1, a first voltage regulator chip (model MC78M12BDTRKG) U8, a fourth bidirectional voltage regulator diode D4 and multiple filter capacitors.

[0042] Power terminals A and B are connected to the power supply of the locomotive; power terminals A and B are connected to the input end of the first power conversion chip U7 through a fuse F1, and the fourth bidirectional voltage regulator diode D4 is connected between the input end (pin VIN) and the ground end (pin GND) of the first power conversion chip U7; the filter circuit is connected between the positive output end (+VO) and the negative output end (0V) of the first power conversion chip U7, wherein the filter circuit is a mature existing technology, and the filter circuit here includes multiple grounded capacitors in parallel; the positive output end (+VO) of the first power conversion chip U7 outputs 15V DC power, and at the same time, the positive output end (+VO) of the first power conversion chip U7 is connected to the input end (pin IN) of the first voltage regulator chip U8, and the output end (pin OUT) of the first voltage regulator chip U8 outputs 12V DC power.

[0043] The device is supplied with 15V and 12V DC power through the power loop.

[0044] Of course, for future use, this power circuit also includes a second power conversion chip (model UWF1205S-3WR3) U9. The input terminal (pin VIN) of this second power conversion chip U9 is connected to 15V DC, and its output terminal (pin +VO) outputs 5V DC. This way, this power circuit can provide three types of DC power: 15V DC, 5V DC, and 12V DC, which can be selected according to your needs.

[0045] To improve performance, filter capacitors are connected to the 15V DC, 5V DC, and 12V DC power supplies to remove noise from the DC power. The filter circuits can be constructed using multiple grounded filter capacitors connected in parallel. The components of the filter circuits will not be detailed in this embodiment. Filter circuits themselves are mature and widely used in existing technologies.

[0046] The speed detection circuit, located within the main housing 1, is used to collect the locomotive's speed signal and, simultaneously, determine the locomotive's braking distance. The speed detection circuit's signal input is connected to the speed acquisition terminal, which is then connected to the locomotive's speed sensor. The speed detection circuit's signal output is connected to the signal input of the main engine U1. In this embodiment, there are three speed acquisition terminals: a speed power supply terminal L, a speed signal terminal C, and a speed ground terminal H. The speed power supply terminal L is connected to a 5V DC power source, and the speed ground terminal H is connected to ground.

[0047] Among them, such as Figure 3As shown, the speed detection circuit includes a first operational amplifier (model TLC2252CDG4) U4.2, a second operational amplifier (model TLC2252CDG4) U4.1 and a first optocoupler (model TLP2303) U5, and a first diode D3 and a first connecting resistor R11 are connected in sequence on the speed signal terminal C, wherein the anode of the first diode D3 is connected to the speed collection terminal C, the cathode of the first diode D3 is connected to the first end of the first connecting resistor R11, the second end of the first connecting resistor R11 is connected to the inverting input terminal of the first operational amplifier U4.2, the non-inverting input terminal of the first operational amplifier U4.2 is grounded through a first grounding resistor R10, and the output terminal of the first operational amplifier U4.2 is connected to the non-inverting input terminal of the first operational amplifier U4.2 through a second connecting resistor R13; the output terminal of the first operational amplifier U4.2 is also connected to the non-inverting input terminal of the second operational amplifier U4.1, the inverting input terminal of the second operational amplifier U4.1 is connected to the output terminal of the second operational amplifier U4.1, and the output terminal of the second operational amplifier U4.1 is connected to the input terminal of the first optocoupler U5 through a third connecting resistor R14, and the output terminal of the first optocoupler U5 is connected to the signal input terminal (pin P6.0) of the host U1.

[0048] The existing speed sensor on the locomotive transmits a pulse signal to the speed detection circuit through the speed signal terminal C, and the speed detection circuit amplifies the signal in two stages and uses a first optocoupler for isolation, thereby ensuring the accuracy of the detection result and avoiding the influence of external signals on the host, and ensuring the operation of the host.

[0049] The speed detection circuit receives the signal of the speed sensor and transmits the signal to the host, and the host determines whether the braking is completed according to the signal. The determination standard is that when the speed is zero, the braking is completed. The speed detection circuit improves the accuracy and stability of the speed signal. Meanwhile, according to the speed signal received by the speed detection circuit, the host can determine the braking distance of the locomotive, and the method is that the speed sensor sends a pulse signal, and the host determines the driving distance of the locomotive according to the received pulse signal. The driving wheel of the locomotive sends a pulse signal for one revolution, and the driving distance is determined according to the number of pulse signals and the diameter of the driving wheel. This is a mature prior art, and the embodiment does not involve improvement of the method.

[0050] The input end of the pressure switch detection circuit is connected to the pressure acquisition terminal, and the output end is connected to the signal input end of the host. There are two pressure acquisition terminals, one is the first pressure terminal (pin F) and the other is the second pressure terminal (pin M). The existing pressure switch on the locomotive can be connected between the first pressure terminal and the second pressure terminal. The pressure acquisition terminal is connected to the pressure switch detection circuit, which is located in the car body and is used to collect pressure signals. According to the pressure signal, it is determined whether the locomotive has started braking. When braking begins, the air pressure increases, and the pressure switch closes. Therefore, it is possible to determine whether the braking process has started based on whether the pressure switch is closed. Among them, locomotive braking and air pressure increase are mature existing technologies. This embodiment does not involve any improvement, but only utilizes the existing structure on the locomotive.

[0051] like Figure 4 As shown, the pressure switch detection circuit includes a second optocoupler (model EL3H4(TA)-VG) U2, the DC power supply is connected to the first pressure terminal (pin F) through the fourth connecting resistor R2, and the second pressure acquisition terminal (pin M) is grounded; at the same time, the first pressure acquisition terminal (pin F) is connected to the positive input end of the second optocoupler U2 through the first light-emitting diode LED1, and the output end of the second optocoupler U2 is connected to the signal input end (pin P3.2) of the host U1; the positive input end of the second optocoupler U2 is also grounded through the second grounding resistor R1 and the first grounding capacitor C1 in parallel; at the same time, the negative input end of the second optocoupler U2 is grounded through the first voltage regulator tube D1.

[0052] When in use, the first pressure terminal and the second pressure terminal are connected to the existing pressure switch of the locomotive through an aviation plug; when working, when the locomotive starts braking, the pressure switch closes, and the pressure switch detection circuit transmits the closing signal of the pressure switch to the input end of the host U1, so that the host U1 obtains the information that braking has started.

[0053] On the locomotive, when the pressure switch is not closed, the pressure switch detection circuit outputs a high level to the signal input end of the host U1. When the pressure switch is closed, the pressure switch detection circuit outputs a low level to the signal input end of the host U1. The signal transmitted by the pressure switch detection circuit is received to determine whether the pressure switch is closed, and then determine whether to start braking.

[0054] The handle position detection circuit is used to detect the handle position, and the handle position detection circuit is located in the main housing 1. Among them, the handle position detection circuit is connected to the handle position contact on the existing locomotive. In this embodiment, the handle position contact is an existing one on the locomotive. This embodiment does not involve improvements to this part. The handle position contact and the handle position terminal can be directly connected through an aviation plug. Here, the handle position terminal includes a handle zero position terminal (pin D) and a handle low position terminal (pin E). The existing handle position contact on the locomotive can be connected to the handle zero position terminal (pin D) and the handle low position terminal (pin E).

[0055] Specifically, such as Figure 5 As shown, the handle position detection circuit includes a fifth connection resistor R6, a sixth connection resistor R7, a second light-emitting diode LED2, a second voltage-stabilizing diode and a third optocoupler U2; the handle zero-position terminal is connected to the positive input end of the third optocoupler U2 through the fifth connection resistor R6, the sixth connection resistor R7 and the second light-emitting diode LED2 in sequence; the handle low-position terminal is connected to the negative input end of the third optocoupler U2 through the second voltage-stabilizing diode D2, and the output end of the third optocoupler U2 is connected to the signal input end (pin P3.3) of the host U1; a third grounding resistor R15 and a second grounding capacitor C3 are connected in parallel between the handle zero-position terminal (pin D) and the handle low-position terminal (pin E).

[0056] When the locomotive handle is at zero or low position, the handle position terminal transmits this signal to the handle position detection circuit, which transmits this signal to the host U1. The host U1 determines the handle position based on the received signal and displays it based on the handle position. When the handle position detection circuit outputs a high level to the signal input terminal of the host U1, it indicates that the handle position is at zero position. When the handle position detection circuit outputs a low level to the signal input terminal of the host U1, it indicates that the handle position is at high position.

[0057] To facilitate the display process, a display circuit is also connected to the host U1, wherein the display circuit includes a display screen LCD1, which is arranged on the main shell 1; the signal input end (pins DB0, DB1, DB2, DB3, DB4, DB5, DB6, DB7) of the display screen LCD1 is connected to the signal output end (pins P2.0, P2.1, P2.2, P2.3, P2.4, P2.5, P2.6, P2.7) of the host U1; the LED-interface of the display screen LCD1 is grounded through the fourth grounding resistor R1, and at the same time, a field effect transistor Q1 is connected to the LED-interface of the display screen LCD1, and the source of the field effect transistor Q1 is connected to the LED-interface of the display screen LCD1; the drain of the field effect transistor Q1 is grounded, and the drain of the field effect transistor Q1 is connected to the gate of the field effect transistor Q1 through the seventh connection resistor R22.

[0058] The host U1 outputs a signal to the display screen LCD1, which displays the signal. Specifically, the display screen LCD1 displays the handle position, braking distance, and driving status.

[0059] To facilitate voice reminders, this embodiment also includes a voice loop, wherein the voice loop is connected to the signal output end of the host U1. When in use, the voice housing 3 is connected to the main housing 1 and the voice loop is placed in the voice housing 3. When in use, the voice housing 3 is connected to the main housing 1 to realize the alarm.

[0060] Among them, such as Figure 7 As shown, the voice circuit includes a voice chip (model CH7002) U10 and a power amplifier chip (model HAA2018A(B)-R) U11; the signal output end (pins P1.6, P1.7, P5.4, P5.5) of the host U1 is connected to the signal input end (pins PA4, PA5, PA6, PA11) of the voice chip U10. At the same time, the host U1 and the voice chip U10 are connected through the serial port, so that the host U1 transmits voice information to the voice chip U10.

[0061] In addition, the USB port (pins USBDM and USBDP) of the voice chip U10 is connected to a USB interface H2. The power terminal of the USB interface H2 is connected to a DC power source, and the ground terminal is connected to the ground. The USB interface H2 can be used for subsequent expansion.

[0062] The signal output end (pin PB0) of the voice chip U10 is connected to the signal input end of the power amplifier chip U11 (pin INN) through the eighth connection resistor R30 and the first connection capacitor C34. The output end (pins VOP, VON) of the power amplifier chip U11 is connected to the built-in speaker CN3.

[0063] The host U1 outputs the signal to the voice chip U10. The signal output by the voice chip U10 passes through the power amplifier chip U11 and is played by the built-in speaker CN3.

[0064] In this embodiment, to facilitate the connection between the voice shell 3 and the main shell 1, a first voice terminal is reserved on the main shell 1. The first voice terminal is connected to the signal output terminal of the host computer. A second voice terminal is reserved on the voice shell 3. The second voice terminal is connected to the signal input terminal of the voice chip. The first and second voice terminals are connected. At the same time, for ease of use, the first and second voice terminals are connected using aviation plugs. This method is convenient and highly stable.

[0065] In this embodiment, in order to facilitate the use and the setting process during use, a button group 2 is also provided on the main housing 1, such as Figure 8As shown, the button group 2 includes a setting button S1, an increase button S2, a position selection button S3 and a confirmation button S4. The first ends of the setting button S1, the increase button S2, the position selection button S3 and the confirmation button S4 are connected to a DC power supply. At the same time, the first ends of the setting button S1, the increase button S2, the position selection button S3 and the confirmation button S4 are connected to the signal input end of the host U1 (pin 3.4, pin 3.5, pin 5.1, pin 5.0), and the second ends of the setting button S1, the increase button S2, the position selection button S3 and the confirmation button S4 are grounded.

[0066] During implementation, the setting button S1, the increase button S2, the position selection button S3 and the confirmation button S4 can be a touch switch with model KH-12X12X19H-TJ.

[0067] To set the braking distance: Press and hold the setup button S1 to enter the password to enter the menu. Only when the password is correct can you enter the setup menu, which is 0001. Enter the menu and use the position select button S3 to cycle through the digital digits to be set. Use the increase button S2 to change the value of the selected digital digit. Use the confirmation button S4 to confirm the set value and save the value. The above process realizes the setting of the braking distance, where the setting range is: stepless allowable braking distance: 1 to 1900 meters (factory default value: 300 meters); step-by-step allowable braking distance: 1 to 1900 meters (factory default value: 500 meters).

[0068] The working process is: braking is divided into stepless braking and infinite braking; place the handle, when the handle is placed at zero position, it is stepless braking; when the handle is placed at the bottom position, it is stepped braking; start braking, the pressure switch is closed, at this time, the handle position is displayed on the display LCD1, driving status: braking; allowed braking distance; among them, the allowed braking distance is pre-set, and the allowed braking distance can be set to the host U1 by setting the button S1, adding the button S2, the position selection button S3 and the confirmation button S4. The allowed braking distance can also be changed by the above method. Among them, the method of changing the braking distance is a mature existing technology, and this embodiment does not involve improvements to this part.

[0069] The locomotive begins braking. When the host U1 receives a speed signal reaching zero, it reaches the braking distance. The braking distance is compared with the set braking distance. When the actual braking distance is greater than the set braking distance, it indicates that the locomotive's driving wheels are slow. The host U1 outputs a signal to the voice circuit, and the built-in speaker issues an alarm signal. The alarm uses an audible alarm. The stepless allowable braking distance (handle zero position) continuously repeats the prompt "Locomotive braking, prevent relaxation" and the stepped allowable braking distance (handle non-zero position) continuously repeats the prompt "Handle is not zero position, prevent relaxation".

[0070] During braking, the main engine U1 outputs signals to LCD1, which displays the following information: handle position: zero / non-zero; driving status: braking; braking distance: set value (any value between 0 and 1900 meters). LCD1 allows users to more intuitively observe the locomotive's operating status.

[0071] Example 2: This example differs from Example 1 in that Figure 9 As shown, the host U1 is connected to a 485 isolation chip U19 (model TD501485) via a serial port. Terminals A and B of the 485 isolation chip U19 can be used to connect to the 485 interface of an external speaker. Furthermore, a first bidirectional voltage regulator D10, as well as a second bidirectional voltage regulator D8 and a third bidirectional voltage regulator D9 connected in series, are connected between the A and B terminals of the 485 isolation chip U19. Furthermore, the connection point between the second and third bidirectional voltage regulator D8 and D9 is connected to the ground terminal of the 485 isolation chip U19. By setting up the 485 isolation chip U19, an external speaker can be connected. Of course, this port can also be left unconnected and reconnected later if needed.

[0072] Example 3, this example is different from Example 1 in that: Figure 10 As shown, the speed detection circuit also includes a wire-to-board connector CN1. The first terminal of wire-to-board connector CN1 is connected to the NE555 chip U6. The second terminal of wire-to-board connector CN1 is connected to the positive terminal of the speed signal terminal (pin C), thereby connecting the speed acquisition terminal to wire-to-board connector CN1. The third terminal of wire-to-board connector CN1 is connected to the speed power terminal (pin L); the fourth terminal of wire-to-board connector CN1 is connected to the speed ground terminal (pin H).

[0073] For subsequent use, connect the signal output terminal of the speed sensor on the locomotive body to the wire-to-board connector CN1, and then connect the wire-to-board connector CN1 to the speed acquisition terminal of the aviation plug. The wire-to-board connector CN1 facilitates the connection of the existing speed sensor on the locomotive to the aviation plug, improving the convenience of the connection process. Here, the speed sensor and the aviation plug are separated by the wire-to-board connector CN1, making it easier to connect the two. Of course, it is also possible to directly connect the existing speed sensor on the locomotive to the C, H, and L points of the aviation plug instead of using the wire-to-board connector.

[0074] The utility model discloses a locomotive driving wheel anti-delay alarm device, which can collect the braking status of the locomotive and send out an alarm signal when the braking distance of the locomotive exceeds a set value to remind the staff. The utility model is easy to use and has a high degree of integration. It only needs to connect the main shell to the locomotive and connect the voice shell to the main shell, thereby effectively ensuring the safety of the locomotive during driving.

Claims

1. Locomotive driving wheel anti-delay alarm device, characterized by: The main housing includes a host computer, and the main housing is provided with connection terminals for connecting with the host computer. The connection terminals include a speed acquisition terminal, a pressure acquisition terminal, a power supply terminal, and a handle position terminal. The power terminal is connected to the locomotive power supply, and the power terminal is connected to a power circuit, which provides power to the device; The speed acquisition terminal, pressure acquisition terminal and handle position terminal are respectively connected to the speed detection circuit, the pressure switch detection circuit and the handle position detection circuit; The speed detection circuit, the pressure switch detection circuit and the handle position detection circuit are respectively connected to the signal input terminal of the host; The signal output terminal of the host is connected to a voice loop.

2. The locomotive driving wheel anti-delay alarm device according to claim 1, characterized in that: It also includes a voice shell, a voice circuit is located in the voice shell, and the voice circuit includes a voice chip and a power amplifier chip; the host outputs a signal to the voice chip, the signal output end of the voice chip is connected to the power amplifier chip, the power amplifier chip is connected to a built-in speaker, and the built-in speaker is located on the voice shell.

3. The locomotive driving wheel anti-delay alarm device according to claim 2, characterized in that: A first voice terminal is reserved on the main shell, and the first voice terminal is connected to the signal output end of the host. A second voice terminal is reserved on the voice shell, and the second voice terminal is connected to the signal input end of the voice chip. The first voice terminal and the second voice terminal are connected.

4. The locomotive driving wheel anti-delay alarm device according to claim 3, characterized in that: The host is also connected to a display circuit, which includes a display screen, which is set on the main shell; the signal input end of the display screen is connected to the signal output end of the host; the LED-interface of the display screen is grounded through a fourth grounding resistor, and at the same time, a field effect tube is connected to the LED-interface of the display screen, and the source of the field effect tube is connected to the LED-interface of the display screen; the drain of the field effect tube is grounded, and the drain of the field effect tube is connected to the gate of the field effect tube through a seventh connection resistor.

5. The locomotive driving wheel anti-delay alarm device according to claim 4, characterized in that: The speed detection circuit includes a first operational amplifier, a second operational amplifier and a first optocoupler, and the speed acquisition terminal is connected in sequence with a first diode and a first connection resistor; the first connection resistor is connected to the inverting input of the first operational amplifier, the non-inverting input of the first operational amplifier is grounded, the output of the first operational amplifier is connected to the non-inverting input of the second operational amplifier, the inverting input of the second operational amplifier is connected to the output of the second operational amplifier, the output of the second operational amplifier is connected to the input of the first optocoupler, and the output of the first optocoupler is connected to the signal input of the host.

6. The locomotive driving wheel anti-delay alarm device according to any one of claims 1 to 5, characterized in that: The pressure switch detection circuit includes a second optocoupler, and the pressure collection terminals include a first pressure collection terminal and a second pressure collection terminal. The DC power supply is connected to the first pressure collection terminal via a fourth connection resistor, and the second pressure collection terminal is grounded. At the same time, the first pressure collection terminal is connected to the positive input terminal of the second optocoupler via a first light-emitting diode, and the output terminal of the second optocoupler is connected to the signal input terminal of the host. The negative input terminal of the second optocoupler is also grounded via a second grounding resistor and a first grounding capacitor connected in parallel. At the same time, the second input terminal of the second optocoupler is grounded through the first voltage regulator tube.

7. The locomotive driving wheel anti-delay alarm device according to claim 6, characterized in that: The handle position terminal includes the handle zero position terminal and the handle low position terminal; The handle position detection circuit includes a fifth connection resistor, a sixth connection resistor, a second light-emitting diode, a second voltage-stabilizing diode and a third optocoupler; the handle zero-position terminal is connected to the positive input end of the third optocoupler through the fifth connection resistor, the sixth connection resistor and the second light-emitting diode in sequence; the handle low-position terminal is connected to the negative input end of the third optocoupler through the second voltage-stabilizing diode, and the output end of the third optocoupler is connected to the signal input end of the host; a third grounding resistor and a second grounding capacitor are connected in parallel between the handle zero-position terminal and the handle low-position terminal.

8. The locomotive driving wheel anti-delay alarm device according to claim 7, characterized in that: The power supply circuit includes a first power conversion chip, a fuse, a first voltage stabilizing chip, a bidirectional voltage stabilizing diode and a plurality of filter capacitors; The power terminal is connected to the input end of the first power conversion chip through a fuse, and the bidirectional voltage regulator diode is connected between the input end and the ground end of the first power conversion chip; the filter circuit is connected between the positive output end and the negative output end of the first power conversion chip; the positive output end of the first power conversion chip outputs 15V DC power, the positive output end of the first power conversion chip is connected to the input end of the first voltage regulator chip, and the output end of the first voltage regulator chip outputs 12V DC power.

9. The locomotive driving wheel anti-delay alarm device according to claim 8, characterized in that: The power supply circuit can also provide 5V DC power. The power supply circuit also includes a second power conversion chip. The input end of the second power conversion chip is connected to 15V DC power, and the output end thereof outputs 5V DC power.

10. The locomotive driving wheel anti-delay alarm device according to claim 9, characterized in that: A button group is also provided on the main shell, which includes a setting button, an increase button, a position selection button and a confirmation button. The first ends of the setting button, the increase button, the position selection button and the confirmation button are connected to a DC power supply. At the same time, the first ends of the setting button, the increase button, the position selection button and the confirmation button are also connected to the signal input end of the host, and the second ends of the setting button, the increase button, the position selection button and the confirmation button are grounded.

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