Relay with alarm function

Abstract

The utility model relates to a relay with an alarm function. The relay comprises a relay body; the switching circuit is connected with a coil of the relay body and is used for being switched on when the coil is powered on and switched off when the coil is powered off; the logic processing circuit is connected with the switching circuit and an armature of the relay body and is used for outputting an alarm signal when the coil is electrified and the armature is not attracted; and the alarm circuit is connected with the logic processing circuit and is used for carrying out an alarm action under the driving of the alarm signal. According to the relay with the alarm function, sound-light alarm is carried out on common faults in the relay, a user can conveniently overhaul the relay, fault points can be quickly locked, meanwhile, the working condition of the relay can be known in the using process, the maintenance time cost is greatly reduced, and the maintenance efficiency is improved. And the user can process the fault problem by himself / herself without service repair, so that the service cost of an enterprise is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the field of electronic components, in particular to a relay with an alarm function. Background Art

[0002] As tractors gain more functionality, relays are increasingly used in their electrical systems. If a relay fails in a tractor, troubleshooting becomes more complex, making it virtually impossible for users without electrical engineering experience to repair it. Furthermore, users often request repair services after a relay failure, which can be costly and burdensome for manufacturers. Utility Model Content

[0003] The utility model provides a relay with an alarm function. When a fault occurs in the relay, the alarm function is realized, making fault detection simpler.

[0004] The utility model solves the above technical problems with the following technical solutions: a relay with an alarm function, comprising:

[0005] Relay body;

[0006] a switch circuit connected to the coil of the relay body, configured to conduct when the coil is energized and disconnect when the coil is de-energized;

[0007] a logic processing circuit connected to the switch circuit and the armature of the relay body, and configured to output an alarm signal when the coil is energized and the armature is not attracted;

[0008] The alarm circuit is connected to the logic processing circuit and is used for performing an alarm action under the drive of the alarm signal.

[0009] On the basis of the above technical solution, the present invention can also be improved as follows.

[0010] Furthermore, the switch circuit includes a reed switch arranged at the lower end of the iron core of the relay body, and two ends of the reed switch are respectively connected to two ends of the coil.

[0011] Furthermore, the logic processing circuit includes:

[0012] An AND gate, wherein two input terminals are respectively connected to two contacts of the armature;

[0013] a pull-down resistor, one end of which is connected to an input terminal of the AND gate and the other end of which is grounded;

[0014] A NOR gate has one input end connected to the output end of the AND gate, and another input end connected to one end of the reed switch.

[0015] Furthermore, the alarm circuit includes a buzzer, one end of the buzzer is connected to the output end of the NOR gate, and the other end of the buzzer is grounded.

[0016] Furthermore, it also includes:

[0017] The coil working state indicating circuit is connected in series with the reed switch and is used to indicate the working state of the coil.

[0018] Furthermore, the coil working state indicating circuit includes a light emitting diode, and the light emitting diode and the reed switch are connected in series at both ends of the coil.

[0019] Furthermore, the coil working state indication circuit further includes a current limiting resistor, and the current limiting resistor, the light emitting diode and the reed switch are connected in series at both ends of the coil.

[0020] Furthermore, it also includes:

[0021] The coil polarity circuit is connected to the coil and is used to determine the positive and negative polarity of the power supply connected to the two ends of the coil.

[0022] Furthermore, the coil polarity circuit includes a reverse freewheeling diode, and two ends of the reverse freewheeling diode are respectively connected to two ends of the coil.

[0023] Furthermore, the positive electrode of the reverse freewheeling diode is connected to one end of the coil and is grounded, and the negative electrode of the reverse freewheeling diode is connected to the other end of the coil.

[0024] The beneficial effects of the utility model are as follows: the utility model is a relay with an alarm function which can give an audible and visual alarm for common faults in the relay, making it convenient for users to carry out maintenance and can quickly lock the fault point. At the same time, the working condition of the relay can also be understood during use, which greatly reduces the maintenance time cost. After the user can handle the fault problem by himself, there is no need to report for service, which also greatly reduces the service cost of the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a structural block diagram of a relay with an alarm function in the utility model;

[0026] Figure 2 This is a circuit schematic diagram of a relay with an alarm function in the utility model. DETAILED DESCRIPTION

[0027] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0028] like Figure 1As shown, a relay with an alarm function includes:

[0029] The relay body includes an iron core 1, a coil 2 wound on the surface of the iron core 1, and an armature 3 provided in conjunction with the iron core 1. The two ends of the coil 2 are respectively a first end C and a second end D, and the two contacts of the armature 3 are respectively a first contact A and a second contact B.

[0030] A switch circuit is connected to the coil 2 of the relay body, and is used to conduct when the coil 2 is energized and to disconnect when the coil 2 is de-energized;

[0031] a logic processing circuit connected to the switch circuit and the armature 3 of the relay body, and configured to output an alarm signal when the coil 2 is energized and the armature 3 is not attracted;

[0032] an alarm circuit, connected to the logic processing circuit, and configured to perform an alarm action driven by the alarm signal;

[0033] A coil working state indicating circuit, connected in series with the switch circuit, for indicating the working state of the coil 2;

[0034] The coil polarity circuit is connected to the coil 2 and is used to determine the positive and negative polarity of the power supply connected to the two ends of the coil 2.

[0035] When using the relay with an alarm function of the present invention, the load is connected between the second contact B and the ground.

[0036] In this specific embodiment, specifically:

[0037] like Figure 2 As shown, the switching circuit includes a reed switch G arranged at the lower end of the iron core 1 of the relay body, and the two ends of the reed switch G are respectively connected to the first end C and the second end D of the coil 2; wherein the second end D is grounded.

[0038] like Figure 2 As shown, the coil working status indication circuit includes a light-emitting diode D2 and a current-limiting resistor R2. The reed switch G, the current-limiting resistor R2 and the light-emitting diode D2 are sequentially connected in series between the first end C and the second end D of the coil 2.

[0039] The reed switch G is assembled at the bottom end of the iron core 1. When the coil 2 is energized, the reed switch G is closed, and the light-emitting diode D2 is lit, indicating the working status of the coil 2.

[0040] like Figure 2 As shown, the logic processing circuit includes:

[0041] AND gate Y1, two input terminals of which are respectively connected to the first contact A and the second contact B of the armature 3;

[0042] A pull-down resistor R1, one end of which is connected to an input terminal of the AND gate (specifically, connected to the input terminal of the AND gate connected to the second contact B), and the other end of which is grounded; the pull-down resistor R1 is used to provide an 0 state signal for the AND gate Y1;

[0043] The NOR gate Y2 has one input end connected to the output end of the AND gate Y1 and the other input end connected to one end of the reed switch G. Figure 2 As shown, the alarm circuit includes a buzzer BL, one end of the buzzer BL is connected to the output end of the NOR gate Y2, and the other end of the buzzer BL is grounded.

[0044] like Figure 2 As shown, the coil polarity circuit includes a reverse freewheeling diode D1, the two ends of which are respectively connected to the first end C and the second end D of the coil 2. Specifically, the anode of the reverse freewheeling diode D1 is connected to the second end D of the coil 2 and to ground, and the cathode of the reverse freewheeling diode D1 is connected to the first end C of the coil. In this embodiment, the coil polarity circuit determines that the first end C is connected to the positive pole of the power supply, and the second end D is connected to the negative pole of the power supply.

[0045] In the present invention, the two input terminals of AND gate Y1 are respectively connected to the two contacts of armature 3. When armature 3 is disconnected, AND gate Y1 outputs 0. When armature 3 is closed, AND gate Y1 outputs 1. When coil 2 is de-energized, the two input terminals of NOR gate Y2 are at the same level, both 0, and NOR gate Y2 outputs 0. When coil 2 is energized and under normal operating conditions (coil energized and armature contacts closed), the two input terminals of NOR gate Y2 are at the same level, both 1, and NOR gate Y2 outputs 0. When coil 2 is energized and the contacts of armature 3 are not closed, the two input terminals of NOR gate Y2 are at different levels, and NOR gate Y2 outputs 1, driving buzzer BL to sound an alarm.

[0046] The utility model relates to a relay with an alarm function, which can produce sound and light alarms for common faults in the relay, making it convenient for users to carry out maintenance and quickly locate the fault point. At the same time, the working condition of the relay can also be understood during use, which greatly reduces the maintenance time cost. After the user can handle the fault problem by himself, there is no need to report it to the service center, which also greatly reduces the service cost of the enterprise.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A relay with an alarm function, characterized in that: include: Relay body; a switch circuit connected to the coil of the relay body, configured to conduct when the coil is energized and disconnect when the coil is de-energized; a logic processing circuit connected to the switch circuit and the armature of the relay body, and configured to output an alarm signal when the coil is energized and the armature is not attracted; The alarm circuit is connected to the logic processing circuit and is used for performing an alarm action under the drive of the alarm signal.

2. The relay with alarm function according to claim 1, characterized in that: The switch circuit includes a reed switch arranged at the lower end of the iron core of the relay body, and two ends of the reed switch are respectively connected to two ends of the coil.

3. The relay with alarm function according to claim 2, characterized in that: The logic processing circuit includes: An AND gate, wherein two input terminals are respectively connected to two contacts of the armature; a pull-down resistor, one end of which is connected to an input terminal of the AND gate and the other end of which is grounded; A NOR gate has one input end connected to the output end of the AND gate, and another input end connected to one end of the reed switch.

4. The relay with alarm function according to claim 3, characterized in that: The alarm circuit includes a buzzer, one end of the buzzer is connected to the output end of the NOR gate, and the other end of the buzzer is grounded.

5. The relay with alarm function according to claim 2, characterized in that: Also includes: The coil working state indicating circuit is connected in series with the reed switch and is used to indicate the working state of the coil.

6. The relay with alarm function according to claim 5, characterized in that: The coil working state indicating circuit includes a light emitting diode, and the light emitting diode and the reed switch are connected in series at both ends of the coil.

7. The relay with alarm function according to claim 6, characterized in that: The coil working state indicating circuit further includes a current limiting resistor. The current limiting resistor, the light emitting diode and the reed switch are connected in series at both ends of the coil.

8. The relay with alarm function according to claim 1, characterized in that: Also includes: The coil polarity circuit is connected to the coil and is used to determine the positive and negative polarity of the power supply connected to the two ends of the coil.

9. The relay with alarm function according to claim 8, characterized in that: The coil polarity circuit includes a reverse freewheeling diode, and two ends of the reverse freewheeling diode are respectively connected to two ends of the coil.

10. The relay with alarm function according to claim 9, characterized in that: The positive electrode of the reverse freewheeling diode is connected to one end of the coil and is grounded, and the negative electrode of the reverse freewheeling diode is connected to the other end of the coil.

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