Relay state detection device and vehicle

Abstract

The utility model relates to the technical field of relays, and discloses a relay state detection device and a vehicle. In the prior art, when parameter acquisition of a to-be-tested relay directly controls on and off of the to-be-tested relay through an input power supply, a use scene of the to-be-tested relay in a vehicle system cannot be accurately simulated, so that state evaluation of the to-be-tested relay is inaccurate, according to the technical scheme, the input power supply is connected with the to-be-tested relay through a switch assembly; the on-off of the to-be-tested relay is controlled through the control switch assembly, the simulation of the use scene of the to-be-tested relay in the vehicle system is realized, and more real parameter acquisition is provided.

Description

Technical Field

[0001] The utility model relates to the technical field of relays, in particular to a relay state detection device and a vehicle. Background Art

[0002] Train onboard relays are important control and protection devices, and their reliable operation is extremely important for train vehicles. However, in actual implementation, as the number of relay operations increases, the electrical and mechanical stresses borne by the relays will cause the performance of the mechanical components inside the mechanism to degrade, and eventually fail to work properly.

[0003] In current technology, the electrical parameters of the relay are usually used to evaluate its status, and the life of the relay is evaluated by parameters such as the contact release time and the pull-in time when it is powered on and off. This method requires the acquisition of the coil current and contact voltage of the relay. In current technology, the input power supply is usually used to directly control the power on and off of the relay. This solution cannot accurately simulate the use scenario of the relay in the vehicle system, making the relay status evaluation inaccurate.

[0004] It can be seen that how to better fit the usage scenarios of relays and achieve more accurate relay status evaluation is an urgent problem to be solved by technical personnel in this field. Utility Model Content

[0005] The purpose of the utility model is to provide a relay state detection device and a vehicle, so as to solve the problem that in the current technology, the parameter collection of the relay to be tested is carried out by directly controlling the power on and off of the relay to be tested through the input power supply, which cannot accurately simulate the use scenario of the relay to be tested in the vehicle system, resulting in inaccurate state evaluation of the relay to be tested.

[0006] In order to solve the above technical problems, the utility model provides a relay state detection device, comprising:

[0007] Input power supply, switch assembly, current acquisition device, voltage acquisition device, processor, first DC power supply;

[0008] The input power supply is connected to a first end of the switch assembly, a second end of the switch assembly is connected to a first end of a coil of a relay to be tested, and a second end of the coil of the relay to be tested is connected to a third end of the switch assembly;

[0009] The probe of the current acquisition device is arranged at the second end of the coil of the relay to be tested to collect the coil current;

[0010] The first end of the first DC power supply is connected to the moving contact of the relay to be tested;

[0011] The second end of the first DC power supply is connected to the first end of the load; the second end of the load is connected to the static contact of the relay to be tested; the probes of the voltage acquisition device are respectively arranged at the moving contact and the static contact to collect the contact voltage;

[0012] The output ends of the current acquisition device and the voltage acquisition device are both connected to the processor, so that the processor can determine the state of the relay to be tested according to the coil current and the contact voltage.

[0013] Preferably, the switch assembly is a switch relay, and correspondingly also includes a second DC power supply;

[0014] Correspondingly, the first end of the coil of the switch relay is connected to the input power supply as the first end of the switch component, and the second end of the coil of the switch relay is grounded;

[0015] The first end of the second DC power supply is connected to the moving contact of the switch relay, and the second end of the second DC power supply is connected to the first end of the coil of the relay to be tested; the static contact of the switch relay is connected to the second end of the coil of the relay to be tested.

[0016] Preferably, the input power supply is a power supply that outputs a square wave signal.

[0017] Preferably, it also includes: a power amplifier;

[0018] The input end of the power amplifier is connected to the output end of the input power supply, and the output end of the power amplifier is connected to the first end of the coil of the switch relay.

[0019] Preferably, the moving contact of the switch relay is a normally closed contact.

[0020] Preferably, there are multiple relays to be tested, which are connected to multiple switch components in a one-to-one correspondence;

[0021] Furthermore, it also includes: a plurality of switching switches;

[0022] The input power source is connected to each of the switch components in a one-to-one correspondence through each of the switching switches, so as to turn on the corresponding relay to be tested when the switching switch is closed.

[0023] Preferably, the input power supply is a switching power supply.

[0024] Preferably, the load is an inductive load.

[0025] Preferably, the output voltages of the first DC power supply and the second DC power supply are the same.

[0026] The utility model also provides a vehicle, comprising a vehicle body and the above-mentioned relay state detection device.

[0027] The relay state detection device provided by the utility model comprises an input power supply, a switch component, a current acquisition device, a voltage acquisition device, a processor, and a first direct current power supply; the input power supply is connected to a first end of the switch component, a second end of the switch component is connected to a first end of a coil of a relay to be tested, and a second end of the coil of the relay to be tested is connected to a third end of the switch component; a probe of the current acquisition device is arranged at the second end of the coil of the relay to be tested to collect coil current; a first end of the first direct current power supply is connected to a moving contact of the relay to be tested; a second end of the first direct current power supply is connected to a first end of a load; a second end of the load is connected to a static contact of the relay to be tested; probes of the voltage acquisition device are respectively arranged at the moving contact and the static contact to collect contact voltage; output ends of the current acquisition device and the voltage acquisition device are both connected to the processor, so that the processor determines the state of the relay to be tested according to the coil current and the contact voltage. Compared with the current technology, in which the parameter collection of the relay to be tested directly controls the on and off of the relay to be tested through the input power supply, it cannot accurately simulate the use scenario of the relay to be tested in the vehicle system, making the state evaluation of the relay to be tested inaccurate. With the present technical solution, the input power supply is connected to the relay to be tested through a switch component, and the on and off of the relay to be tested is controlled by controlling the switch component, thereby realizing the simulation of the use scenario of the relay to be tested in the vehicle system and providing more realistic parameter collection.

[0028] In addition, the vehicle provided by the utility model includes a vehicle body and the above-mentioned relay state detection device, and the effect is the same as above. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present utility model, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 A structural diagram of a relay state detection device provided by an embodiment of the utility model;

[0031] The figure numbers are as follows: 1 is the input power supply, 2 is the switch component, 3 is the current acquisition device, 4 is the voltage acquisition device, 5 is the processor, 6 is the first DC power supply, 7 is the relay to be tested, 8 is the second DC power supply, 9 is the coil of the switch relay, 10 is the moving contact of the switch relay, 11 is the static contact of the switch relay, and 12 is the power amplifier. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the utility model.

[0033] The core of the utility model is to provide a relay state detection device and a vehicle to better fit the use scenario of the relay and achieve more accurate relay state evaluation.

[0034] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0035] Figure 1 A structural diagram of a relay state detection device provided by an embodiment of the utility model, such as Figure 1 As shown, the relay state detection device includes:

[0036] Input power supply 1, switch assembly 2, current acquisition device 3, voltage acquisition device 4, processor 5, first DC power supply 6;

[0037] The input power supply 1 is connected to a first end of the switch assembly 2, the second end of the switch assembly 2 is connected to a first end of the coil of the relay 7 to be tested, and the second end of the coil of the relay 7 to be tested is connected to a third end of the switch assembly 2;

[0038] The probe of the current acquisition device 3 is arranged at the second end of the coil of the relay 7 to be tested to collect the coil current;

[0039] A first end of the first DC power supply 6 is connected to a moving contact of the relay to be tested 7;

[0040] The second end of the first DC power supply 6 is connected to the first end of the load; the second end of the load is connected to the static contact of the relay 7 to be tested; the probes of the voltage acquisition device 4 are respectively arranged at the moving contact and the static contact to collect the contact voltage;

[0041] The output ends of the current acquisition device 3 and the voltage acquisition device 4 are both connected to the processor 5, so that the processor 5 can determine the state of the relay 7 to be tested according to the coil current and the contact voltage.

[0042] The relay state detection device provided by the utility model is mainly used to evaluate the service life of the relay 7 to be tested. The relay in the utility model is mainly an electromagnetic relay. The electrical parameters of the relay 7 to be tested are collected during operation to evaluate the state of the relay contacts, and then the service life of the relay is evaluated. It can be understood that in the specific implementation, the relay is an important control and protection device. As the number of relay operations increases, the electrical stress and mechanical stress borne by the relay will cause the performance of the mechanical components inside the mechanism to degrade, and eventually fail to work normally. It is specifically manifested in the degradation and adhesion of the relay contacts. Contact degradation is a process, and when it degrades to a certain extent, it reaches the end of the life of the relay. The relay state detection device provided by the utility model can achieve early judgment of the safe use of the relay by evaluating the life of the relay 7 to be tested. It is applied to the vehicle system to ensure the driving safety of the vehicle.

[0043] In this embodiment, the current acquisition device 3 and the voltage acquisition device 4 are the main devices for detecting electrical parameters, which are composed of a probe and a processing device. The probe is set at the acquisition position to collect electrical parameters, and after the signal conversion by the processing device, it is output to the subsequent processor 5 for further processing. It can be understood that the life evaluation of the relay is carried out based on its overtravel time, release time, and pull-in time. Therefore, the electrical parameters that need to be collected are the coil current and contact voltage of the relay 7 to be tested. Therefore, in this embodiment, the probe of the current acquisition device 3 is set at the coil of the relay 7 to be tested, and the probe of the voltage acquisition device 4 is set at the contact of the relay 7 to be tested.

[0044] When applied to a vehicle system, the processor 5 in this embodiment can be an electronic control unit (ECU) in the vehicle, or a processor of other control circuits. After the coil current and contact voltage are collected, they can also be de-noised to ensure the accuracy and effectiveness of the coil current and contact voltage data, so as to facilitate the subsequent accurate and effective evaluation of the relay life.

[0045] The first DC power supply 6 in this embodiment is used to form a circuit with the moving contact and the static contact of the relay to be tested 7, and a current is formed in the circuit when the contact is closed. In the vehicle system, the relay to be tested 7 can be used to control lights, wipers, starters, air conditioners, electric seats, electric doors and windows, anti-lock devices, suspension control, audio, etc., so the moving contact of the relay to be tested 7 is usually a normally closed contact.

[0046] It is understandable that in the vehicle system, the switching control of the ECU on the relay 7 to be tested usually needs to be controlled through the hardware structure, and the signal transmission control is performed through the corresponding switch component 2. Therefore, in a specific implementation, if the input power supply 1 is directly connected to the relay 7 to be tested for control, it is impossible to accurately simulate the application scenario of the relay in the vehicle system, resulting in errors in the evaluation results. In this regard, in this embodiment, in order to ensure the accuracy of the evaluation, the switch component 2 is introduced, and the input power supply 1 controls the relay 7 to be tested through the switch component 2 to achieve a more realistic simulation of the usage scenario of the relay 7 to be tested.

[0047] The switch component 2 in this embodiment can be a transistor or a field effect transistor. In order to be more suitable for use in a vehicle system, a switch relay can be selected as the switch component 2 in this embodiment, which is more suitable for use of the relay 7 to be tested in a vehicle system.

[0048] It is understandable that the input power supply 1 in this embodiment needs to control the switch component 2 to realize the on-off control of the relay 7 to be tested. Therefore, the input power supply 1 in this embodiment can be a switching power supply. In order to more conveniently adjust the output power and switching frequency of the power supply, a signal source that outputs a square wave signal can be selected as the input power supply 1, and the switching frequency can be adjusted by adjusting the duty cycle. It is understandable that the selection of a signal source as the input power supply can directly output a square wave signal of a corresponding duty cycle according to demand. Compared with the switching control of the switching power supply, which requires computer assistance, the signal source can directly adjust the switching frequency. When the signal source is selected as the input power supply 1, in order to adapt to the use scenario in the vehicle system, the relay state detection device also includes: a power amplifier 12; the input end of the power amplifier 12 is connected to the output end of the input power supply, and the output end of the power amplifier 12 is connected to the first end of the coil 9 of the switching relay. The output of the signal source is amplified by the power amplifier 12, and the 10V square wave signal output by the signal source is amplified to 110V, so as to realize the simulation of the use scenario in the vehicle system.

[0049] Furthermore, in order to better fit the use scenario of the relay 7 to be tested, the load in this embodiment can be an inductive load, such as a motor, a contactor, etc.

[0050] The relay state detection device provided by the embodiment of the utility model includes an input power supply, a switch component, a current acquisition device, a voltage acquisition device, a processor, and a first DC power supply; the input power supply is connected to the first end of the switch component, the second end of the switch component is connected to the first end of the coil of the relay to be tested, and the second end of the coil of the relay to be tested is connected to the third end of the switch component; the probe of the current acquisition device is arranged at the second end of the coil of the relay to be tested to collect the coil current; the first end of the first DC power supply is connected to the moving contact of the relay to be tested; the second end of the first DC power supply is connected to the first end of the load; the second end of the load is connected to the static contact of the relay to be tested; the probe of the voltage acquisition device is respectively arranged at the moving contact and the static contact to collect the contact voltage; the output ends of the current acquisition device and the voltage acquisition device are both connected to the processor, so that the processor can evaluate the state of the relay to be tested according to the coil current and the contact voltage. Compared with the current technology, in which the parameter collection of the relay to be tested directly controls the on and off of the relay to be tested through the input power supply, it cannot accurately simulate the use scenario of the relay to be tested in the vehicle system, making the state evaluation of the relay to be tested inaccurate. With the present technical solution, the input power supply is connected to the relay to be tested through a switch component, and the on and off of the relay to be tested is controlled by controlling the switch component, thereby realizing the simulation of the use scenario of the relay to be tested in the vehicle system and providing more realistic parameter collection.

[0051] The above embodiments introduce various configuration schemes of the switch assembly 2. This embodiment provides a specific switch assembly 2, including a switch relay and correspondingly also including a second DC power supply 8;

[0052] Correspondingly, the first end of the coil 9 of the switch relay is connected to the input power supply 1 as the first end of the switch component 2, and the second end of the coil 9 of the switch relay is grounded;

[0053] The first end of the second DC power supply 8 is connected to the moving contact 10 of the switch relay, and the second end of the second DC power supply 8 is connected to the first end of the coil of the relay 7 to be tested; the static contact 11 of the switch relay is connected to the second end of the coil of the relay 7 to be tested.

[0054] In this embodiment, a switch relay is used as a switch component, which is closer to the use scenario of the relay to be tested in the vehicle system. The second DC power supply 8 in this embodiment forms a loop with the coil of the relay to be tested 7 to realize the on-off control of the relay to be tested 7. In a specific implementation, since the vehicle driver's control of the relay to be tested 7 is usually a dynamic closing control, the dynamic contact 10 of the switch relay in this embodiment can be a dynamic closing contact. In addition, in a specific implementation, the terminal controlled by the relay to be tested 7 is different, and the voltage of the first DC power supply 6 connected to it may also be different. When the switch relay is connected accordingly, the output voltages of the first DC power supply 6 and the second DC power supply 8 may be the same or different.

[0055] On the basis of the above embodiments, in this embodiment, there are multiple relays 7 to be tested, which are connected one-to-one with multiple switch components 2; further, it also includes: multiple switching switches; the input power supply 1 is connected one-to-one with each switch component 2 through each switching switch to turn on the corresponding relay 7 to be tested when the switching switch is closed.

[0056] This embodiment provides a detection scheme for multiple relays to be tested. In this embodiment, in addition to controlling each relay to be tested through a switch component, the input power supply can also switch different conduction circuits through a switching switch to achieve state detection of different relays to be tested. The switching switch can be a main switch, and the control of all switch components can be achieved through the main switch. It can also be set up in a group and classification manner for each switch component, and each group and each switch component can be controlled through each switching switch. The switching switch can be controlled by a processor, or it can be in the form of a button, and the switch can be manually controlled by a technician.

[0057] Finally, an embodiment of the utility model further provides a vehicle, comprising a vehicle body and the above-mentioned relay state detection device.

[0058] The vehicle provided by the embodiment of the utility model includes a vehicle body and a relay state detection device, wherein the relay state detection device includes an input power supply, a switch component, a current acquisition device, a voltage acquisition device, a processor, and a first DC power supply; the input power supply is connected to the first end of the switch component, the second end of the switch component is connected to the first end of the coil of the relay to be tested, and the second end of the coil of the relay to be tested is connected to the third end of the switch component; the probe of the current acquisition device is arranged at the second end of the coil of the relay to be tested to collect the coil current; the first end of the first DC power supply is connected to the moving contact of the relay to be tested; the second end of the first DC power supply is connected to the first end of the load; the second end of the load is connected to the static contact of the relay to be tested; the probes of the voltage acquisition device are respectively arranged at the moving contact and the static contact to collect the contact voltage; the output ends of the current acquisition device and the voltage acquisition device are both connected to the processor, so that the processor can evaluate the state of the relay to be tested according to the coil current and the contact voltage. Compared with the current technology, in which the parameter collection of the relay to be tested directly controls the on and off of the relay to be tested through the input power supply, it cannot accurately simulate the use scenario of the relay to be tested in the vehicle system, making the state evaluation of the relay to be tested inaccurate. With the present technical solution, the input power supply is connected to the relay to be tested through a switch component, and the on and off of the relay to be tested is controlled by controlling the switch component, thereby realizing the simulation of the use scenario of the relay to be tested in the vehicle system and providing more realistic parameter collection.

[0059] The above is a detailed introduction to the relay state detection device and the vehicle provided by the utility model. The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can refer to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can refer to the method part description. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

[0060] It should also be noted that, in this specification, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

Claims

1. A relay state detection device, characterized in that: include: An input power source (1), a switch component (2), a current acquisition device (3), a voltage acquisition device (4), a processor (5), and a first direct current power source (6); The input power supply (1) is connected to a first end of the switch component (2), a second end of the switch component (2) is connected to a first end of a coil of a relay to be tested (7), and a second end of the coil of the relay to be tested (7) is connected to a third end of the switch component (2); The probe of the current collection device (3) is arranged at the second end of the coil of the relay (7) to be tested to collect the coil current; The first end of the first DC power supply (6) is connected to the moving contact of the relay to be tested (7); The second end of the first DC power supply (6) is connected to the first end of the load; the second end of the load is connected to the static contact of the relay to be tested (7); the probes of the voltage acquisition device (4) are respectively arranged at the moving contact and the static contact to collect the contact voltage; The output ends of the current acquisition device (3) and the voltage acquisition device (4) are both connected to the processor (5), so that the processor (5) can determine the state of the relay (7) to be tested according to the coil current and the contact voltage.

2. The relay state detection device according to claim 1, characterized in that: The switch assembly (2) is a switch relay, and correspondingly also includes a second DC power supply (8); Correspondingly, the first end of the coil (9) of the switch relay is connected to the input power supply (1) as the first end of the switch component (2), and the second end of the coil (9) of the switch relay is grounded; The first end of the second DC power supply (8) is connected to the moving contact (10) of the switch relay, and the second end of the second DC power supply (8) is connected to the first end of the coil of the relay to be tested (7); the static contact (11) of the switch relay is connected to the second end of the coil of the relay to be tested (7).

3. The relay state detection device according to claim 2, characterized in that: The input power supply (1) is a power supply that outputs a square wave signal.

4. The relay state detection device according to claim 3, characterized in that: Also includes: Power amplifier (12); The input end of the power amplifier (12) is connected to the output end of the input power supply (1), and the output end of the power amplifier (12) is connected to the first end of the coil (9) of the switch relay.

5. The relay state detection device according to claim 4, characterized in that: The moving contact (10) of the switch relay is a normally closed contact.

6. The relay state detection device according to claim 4, characterized in that: There are a plurality of relays (7) to be tested, which are connected to a plurality of switch components (2) in a one-to-one correspondence; Furthermore, it also includes: a plurality of switching switches; The input power source (1) is connected to each of the switch components (2) in a one-to-one correspondence via each of the switching switches, so as to switch on the corresponding relay to be tested (7) when the switching switch is closed.

7. The relay state detection device according to claim 1, characterized in that: The input power supply (1) is a switching power supply.

8. The relay state detection device according to any one of claims 1 to 7, characterized in that: The load is an inductive load.

9. The relay state detection device according to claim 2, characterized in that: The output voltages of the first DC power supply (6) and the second DC power supply (8) are the same.

10. A vehicle, characterized in that: It comprises a vehicle body and the relay state detection device according to any one of claims 1 to 9.

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