CN115728626A - Train signal control system and relay contact detection device thereof - Google Patents
Train signal control system and relay contact detection device thereof Download PDFInfo
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- CN115728626A CN115728626A CN202111021009.7A CN202111021009A CN115728626A CN 115728626 A CN115728626 A CN 115728626A CN 202111021009 A CN202111021009 A CN 202111021009A CN 115728626 A CN115728626 A CN 115728626A
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Abstract
The application discloses relay contact detection device includes: the driving circuit is used for receiving the electric energy of the first power supply and outputting a first electric signal according to the control rule of the controller; the self-checking circuit is used for transmitting the first electric signal to the first contact of the relay to be tested when the self-checking circuit is in a non self-checking state; the controller is used for realizing the self-checking of the relay contact detection device when the self-checking circuit is controlled to be in a self-checking state; after the self-checking circuit is controlled to be in a non-self-checking state, whether a first electric signal is received through the input channel acquisition circuit or not is judged, if yes, the first contact and the second contact of the relay to be tested are determined to be in a conducting state, and if not, the first contact and the second contact of the relay to be tested are determined to be in a disconnecting state; and inputting a channel acquisition circuit. By the scheme, accuracy in detecting the state of the relay contact can be effectively improved. The application also provides a train signal control system which has a corresponding effect.
Description
Technical Field
The invention relates to the technical field of signal detection, in particular to a train signal control system and a relay contact detection device thereof.
Background
The relay is an electric control device and plays roles of dynamic adjustment, safety protection, timely switching and the like in a circuit. Any group of contacts of the relay can reflect the state of the control coil of the relay, and in a signal system of rail transit, state acquisition of the control coil of the relay is often required to be realized by detecting the state of the contacts, and corresponding logic control is completed by other application software according to the state of the control coil. However, in practical application, the situation that the detection result is inaccurate often occurs, which is not favorable for the stable operation of the train.
In summary, how to effectively improve the accuracy of detecting the state of the relay contact is a technical problem that those skilled in the art are urgently required to solve.
Disclosure of Invention
The invention aims to provide a train signal sending control system and a relay contact detection device thereof, so as to effectively improve the accuracy of detecting the state of a relay contact.
In order to solve the technical problems, the invention provides the following technical scheme:
a relay contact detection apparatus comprising:
the driving circuit is connected with the controller and the first power supply and used for receiving the electric energy of the first power supply and outputting a first electric signal according to the control rule of the controller;
the self-checking circuit is respectively connected with the driving circuit, the controller, the second power supply, the input channel acquisition circuit and the first contact of the relay to be tested, and is used for transmitting the first electric signal to the input channel acquisition circuit and transmitting the received electric energy of the second power supply to the controller when the self-checking circuit is in a self-checking state; when the relay is in a non-self-checking state, the first electric signal is transmitted to a first contact of the relay to be tested;
the controller is connected with the input channel acquisition circuit and is used for determining that the relay contact detection device passes the self-detection when receiving the electric energy of the second power supply and receiving the first electric signal through the input channel acquisition circuit after controlling the self-detection circuit to be in a self-detection state; after the self-checking circuit is controlled to be in a non self-checking state, whether the first electric signal is received through the input channel acquisition circuit or not is judged, if yes, the first contact and the second contact of the relay to be tested are determined to be in a conducting state, and if not, the first contact and the second contact of the relay to be tested are determined to be in a disconnecting state;
and the input channel acquisition circuit is connected with the second contact of the tested relay.
Preferably, the first electric signal is a pulse signal with a duty ratio controlled by the controller.
Preferably, the controller is specifically configured to control the self-checking circuit to be in a self-checking state according to a preset period.
Preferably, the controller is further configured to:
and outputting first prompt information when the self-checking of the relay contact detection device is determined not to pass.
Preferably, the method further comprises the following steps:
and the first diode is serially arranged between the first contact of the relay to be tested and the self-checking circuit, and the cathode of the first diode is connected with the first contact of the relay to be tested.
Preferably, the method further comprises the following steps:
the second diode is arranged between the self-checking circuit and the input channel acquisition circuit in series, and the cathode of the second diode is connected with the input channel acquisition circuit.
Preferably, the input channel acquisition circuit includes:
the input end of the voltage division filter circuit is used as the input end of the input channel acquisition circuit;
the input end is connected with the output end of the voltage division filter circuit, and the output end of the voltage division filter circuit is used as a first isolation circuit of the output end of the input channel acquisition circuit.
Preferably, the first isolation circuit is based on a capacitive isolation chip.
Preferably, the voltage-dividing filter circuit includes:
the first end of the first resistor is used as the input end of the voltage division filter circuit, and the second end of the first resistor is connected with the first end of the second resistor;
the second end of the second resistor is respectively connected with the first end of the third resistor and the first end of the first capacitor, and the connecting end of the second resistor is used as the second resistor of the output end of the voltage division filter circuit;
the third resistor with the second end grounded;
the second end of the first capacitor is grounded.
Preferably, the method further comprises the following steps:
the negative electrode of the voltage stabilizing diode is respectively connected with the second end of the first resistor and the first end of the second resistor, and the positive electrode of the voltage stabilizing diode is grounded;
and the negative electrode of the TVS diode is connected with the first end of the first resistor, and the positive electrode of the TVS diode is grounded.
Preferably, the self-test circuit includes a first relay;
the first end and the second end of a control coil of the first relay are respectively connected with the positive electrode of a third power supply and the controller, the movable end of a first controlled branch of the first relay is connected with the output end of the driving circuit, the first immovable end and the second immovable end of a first controlled branch of the first relay are respectively connected with the first contact of the tested relay and the input channel acquisition circuit, the movable end of a second controlled branch of the first relay is connected with the second power supply, the first immovable end of a second controlled branch of the first relay is suspended, and the second immovable end of the second controlled branch of the first relay is connected with the controller.
Preferably, the method further comprises the following steps:
a second isolation circuit disposed between the controller and the drive circuit.
Preferably, the method further comprises the following steps:
an isolated power supply circuit disposed between the drive circuit and the first power supply.
Preferably, the drive circuit includes:
the first end of the fourth resistor is connected with the controller and is used as the control end of the driving circuit, and the second end of the fourth resistor is respectively connected with the control end of the first switching tube, the first end of the fifth resistor and the first end of the second capacitor;
the fifth resistor with the second end grounded;
the second capacitor with a grounded second end;
the first switch tube is connected with the first end of the sixth resistor at the first end and grounded at the second end;
the second end of the sixth resistor is connected with the first end of the seventh resistor and the control end of the second switching tube respectively;
the second end of the seventh resistor is connected with the second end of the second switching tube, and the connecting end of the seventh resistor is used as the input end of the driving circuit and is connected with the first power supply;
the first end of the second switch tube is used as the output end of the driving circuit.
A train signal control system comprises the relay contact detection device.
By applying the technical scheme provided by the embodiment of the invention, the inaccuracy of the relay contact state detection in the traditional scheme is considered, and the abnormality of the detection device is often caused, so that the relay contact detection device not only can detect whether the first contact and the second contact of the relay to be detected are in a conducting state or a disconnecting state, but also can determine whether the relay contact detection device can pass self-checking by using a self-checking circuit.
Specifically, drive circuit can export first signal of telecommunication according to the control rule of controller, when self-checking circuit is self-checking state by itself, self-checking circuit can be with first signal of telecommunication transmission to input channel acquisition circuit 40 to the electric energy transmission to the controller of the second power with receiving, consequently, when the controller received the electric energy of second power, and when receiving first signal of telecommunication through input channel acquisition circuit, alright pass through with confirming relay contact detection device self-checking. And when self-checking circuit is non self-checking state by itself, self-checking circuit can be with first signal of telecommunication transmission to the first contact of being surveyed the relay, the controller can judge whether receive first signal of telecommunication through input channel acquisition circuit after controlling self-checking circuit for non self-checking state, if yes, then confirm to be for the on-state between the first contact of being surveyed the relay and the second contact, if not, then confirm to be the off-state between the first contact of being surveyed the relay and the second contact, that is to say, when self-checking circuit is non self-checking state, the relay contact detection device of this application can realize detecting to the break-make between the first contact of being surveyed the relay and the second contact.
In summary, because the scheme of the application can be used for self-checking the relay contact detection device, the condition that the contact state detection of the relay to be detected is inaccurate due to the self abnormality of the relay contact detection device can be avoided, namely, the accuracy in detecting the contact state of the relay can be effectively improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a relay contact detection device according to the present invention;
FIG. 2 is a schematic diagram of a driving circuit according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a relay contact detection apparatus according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an input channel acquisition circuit in an embodiment of the present invention.
Detailed Description
The core of the invention is to provide the relay contact detection device, which is beneficial to effectively improving the accuracy of detecting the state of the relay contact.
In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments. It should be apparent that the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a relay contact detection device according to the present invention, which may include:
the driving circuit 10 is connected with the controller 30 and the first power supply V1, and is configured to receive electric energy of the first power supply V1 and output a first electric signal according to a control rule of the controller 30;
the self-test circuit 20 is respectively connected with the driving circuit 10, the controller 30, the second power supply V2, the input channel acquisition circuit 40 and the first contact of the relay to be tested, and is used for transmitting a first electric signal to the input channel acquisition circuit 40 and transmitting the received electric energy of the second power supply V2 to the controller 30 when the self-test circuit is in a self-test state; when the relay is in a non-self-checking state, transmitting a first electric signal to a first contact of a relay to be tested;
the controller 30 is connected with the input channel acquisition circuit 40 and is used for determining that the relay contact detection device passes the self-detection when receiving the electric energy of the second power supply V2 and receiving the first electric signal through the input channel acquisition circuit 40 after controlling the self-detection circuit 20 to be in the self-detection state; after the self-test circuit 20 is controlled to be in a non self-test state, whether a first electric signal is received through the input channel acquisition circuit 40 or not is judged, if yes, a conducting state is determined between a first contact and a second contact of the relay to be tested, and if not, a disconnecting state is determined between the first contact and the second contact of the relay to be tested;
and the input channel acquisition circuit 40 is connected with the second contact of the relay to be tested.
Specifically, the driving circuit 10 receives the power of the first power source V1 and outputs a first electrical signal according to the control rule of the controller 30. The first power supply V1 is usually a dc power supply, and the specific voltage level can be set and adjusted as required, for example, 24V. Similarly, the voltage levels of the power supplies described hereinafter may be set and adjusted according to actual needs, without affecting the practice of the present invention.
In an embodiment of the present invention, referring to fig. 3, the method may further include: the isolation power supply circuit 60 provided between the drive circuit 10 and the first power supply V1, and the specific circuit configuration of the isolation power supply circuit 60 may be set as needed, and for example, the isolation power supply circuit 60 of 24V to 24V may be used. Through setting up isolation power supply circuit 60, can supply power with the contact group of first power V1 and relay under test and keep apart, improve the safety of this application scheme, the reliability.
The driving circuit 10 is generally selected from the driving circuits 10 based on switching tubes, and the controller 30 can control the waveform of the first electrical signal output by the driving circuit 10 by performing on-off control on the corresponding switching tube, that is, the waveform of the first electrical signal is influenced by the control rule of the controller 30. For example, a simple way is that the controller 30 controls the driving circuit 10 to keep on, so that the first electric signal is a continuous high-level signal.
Further, in an embodiment of the present invention, considering that the contact state detection of the relay to be tested and the self-detection of the relay contact detection device can also be achieved when the first electrical signal is a pulse signal, in this embodiment, the first electrical signal is set as the pulse signal, and the duty ratio of the first electrical signal is controlled by the controller 30, which is beneficial to reducing the power consumption of the solution of the present application compared to a continuous high-level signal. The embodiment of fig. 2 is selected for this embodiment.
The specific circuit configuration of the driving circuit 10 can be set and adjusted according to actual needs, for example, in an embodiment of the present invention, referring to fig. 2, the driving circuit 10 includes:
a fourth resistor R4 having a first end connected to the controller 30 and serving as a control end of the driving circuit 10, and a second end connected to the control end of the first switching tube Q1, the first end of the fifth resistor R5, and the first end of the second capacitor C2, respectively;
a fifth resistor R5 with a second end grounded;
a second capacitor C2 with a second end grounded;
the first switch tube Q1 is connected with the first end of the sixth resistor R6 at the first end and grounded at the second end;
a sixth resistor R6 having a second end connected to the first end of the seventh resistor R7 and the control end of the second switching tube Q2, respectively;
a seventh resistor R7 having a second end connected to the second end of the second switch Q2, and a connection end serving as an input end of the driving circuit 10 connected to the first power supply V1;
and a second switch tube Q2 having a first end serving as an output end of the driving circuit 10.
In this embodiment, voltage division is realized by the fourth resistor R4 and the fifth resistor R5, and filtering is realized by the second capacitor C2. The first switch tube Q1, the sixth resistor R6, the seventh resistor R7 and the second switch tube Q2 form a transistor switch circuit, so as to realize waveform control of outputting the first electric signal under the control of the controller 30.
The driving circuit 10 in this embodiment has a simple circuit configuration and high reliability. The specific parameters of each resistor, each switching tube and the second capacitor C2 can be set and adjusted according to actual needs.
The driving circuit 10 is configured to output a first electrical signal, and when the controller 30 controls the self-test circuit 20 to be in the self-test state, the self-test circuit 20 transmits the first electrical signal to the input channel acquisition circuit 40 and transmits the received power of the second power source V2 to the controller 30. After the controller 30 controls the self-test circuit 20 to be in the self-test state, if the electric energy of the second power source V2 is received, it may be indicated that the self-test circuit 20 itself is not abnormal, and if the first electric signal is received through the input channel collecting circuit 40, it may be indicated that the input channel collecting circuit 40 and the driving circuit 10 are also not abnormal, that is, the loop for transmitting the first electric signal is not abnormal at this time, so when the controller 30 receives the electric energy of the second power source V2 and receives the first electric signal through the input channel collecting circuit 40, it may be determined that the self-test of the relay contact detecting device passes.
Of course, if the power of the second power source V2 is not received, or the first electrical signal is not received through the input channel collecting circuit 40, it can be determined that the self-test of the relay contact detecting device fails. After determining that the failure is not passed, the specific countermeasure may be set and adjusted as needed, for example, the contact state detection of the relay to be tested may be suspended until the worker repairs the fault, and as another example, in an embodiment of the present invention, the controller 30 may further be configured to: when the fact that the self-checking of the relay contact detection device fails is determined, first prompt information is output, so that relevant personnel can find the situation in time, and further fault processing can be carried out as early as possible.
Whether the self-checking circuit 20 is in the self-checking state or not is controlled by the controller 30, and in practical applications, considering that the occurrence of the abnormality of the relay contact detection device is a random event, the controller 30 may be specifically configured to: and controlling the self-checking circuit 20 to be in a self-checking state according to a preset period, so that whether the relay contact detection device is abnormal or not can be determined in time. Certainly, other control modes can be provided in other occasions, for example, a self-check is performed each time a train enters a garage, or if a worker performs manual control, the worker determines whether to perform the self-check of the relay contact detection device according to needs.
The specific circuit configuration of the self-checking circuit 20 may be set and adjusted as needed to achieve the object of the present application, for example, in one embodiment of the present invention, the self-checking circuit 20 includes a first relay K1;
the first end and the second end of a control coil of the first relay K1 are respectively connected with the positive electrode of a third power supply V3 and a controller 30, the movable end of a first controlled branch of the first relay K1 is connected with the output end of a driving circuit 10, the first immovable end and the second immovable end of the first controlled branch of the first relay K1 are respectively connected with a first contact of a tested relay and an input channel acquisition circuit 40, the movable end of a second controlled branch of the first relay K1 is connected with a second power supply V2, the first immovable end of the second controlled branch of the first relay K1 is suspended, and the second immovable end of the second controlled branch of the first relay K1 is connected with the controller 30.
In this embodiment, the function of the self-checking circuit 20 of the present application can be realized by the first relay K1, so that the self-checking circuit 20 has a very simple structure and high reliability, and this embodiment is adopted in fig. 3 of the present application. When the first relay K1 is adopted, the first relay K1 is required to have at least 2 controlled branches, and the controller 30 can control whether the first relay K1 is attracted or not by controlling the energization state of the control coil of the first relay K1, so that the states of the controlled branches of the first relay K1 can be controlled. For example, in a specific situation, when the first relay K1 is attracted, the moving end of the first controlled branch of the first relay K1 is connected to the first immobile end of the first controlled branch of the first relay K1, and the moving end of the second controlled branch of the first relay K1 is connected to the first immobile end of the second controlled branch of the first relay K1, whereas, when the first relay K1 is not attracted, the moving end of the first controlled branch of the first relay K1 is connected to the second immobile end of the first controlled branch of the first relay K1, and the moving end of the second controlled branch of the first relay K1 is connected to the second immobile end of the second controlled branch of the first relay K1.
The driving circuit 10 is configured to output a first electrical signal, and when the controller 30 controls the self-test circuit 20 to be in a non-self-test state, the self-test circuit 20 transmits the first electrical signal to the first contact of the relay to be tested, and as can be seen from a circuit structure, if the first contact and the second contact of the relay to be tested are in a conducting state, the controller 30 may receive the first electrical signal through the input channel collecting circuit 40, otherwise, if the first contact and the second contact of the relay to be tested are in an off state, the controller 30 cannot receive the first electrical signal. Therefore, after controlling the self-test circuit 20 to be in the non-self-test state, the controller 30 can determine the on-off state between the first contact and the second contact of the relay to be tested by determining whether the first electrical signal is received through the input channel acquisition circuit 40, that is, the relay contact detection device of the present application realizes the function of detecting the contact state of the relay to be tested.
The first contact and the second contact of the tested relay are used as a group of contacts of the tested relay, or are called as a controlled branch of the tested relay, so that the energization state of the control coil of the tested relay can be reflected, and certainly, when the tested relay further comprises other controlled branches, the states of other controlled branches of the tested relay can also be reflected. After the electrified state of the control coil of the relay to be tested is known, corresponding logic control can be completed accordingly, and stable operation of the train is guaranteed. In fig. 1 and 3 of the present application, only the first contact and the second contact of the relay under test are shown, and the control coil of the relay under test is not shown.
In an embodiment of the present invention, the method may further include:
and the first diode D1 is arranged between the first contact of the relay to be tested and the self-test circuit 20 in series, and the cathode of the first diode D1 is connected with the first contact of the relay to be tested.
In this kind of embodiment, through setting up first diode D1, can play when the external voltage appears and prevent reverse effect, for example induced voltage may appear when the site environment is abominable, if relay contact detection device uses with other integrated circuit boards mixedly again, probably leads to introducing external voltage through the first contact and the second contact of being surveyed the relay, through setting up first diode D1, can protect circuit and power among the relay contact detection device of this application effectively.
Also, in an embodiment of the present invention, the method may further include:
and a second diode D2 arranged in series between self-test circuit 20 and input channel acquisition circuit 40, and a cathode of second diode D2 is connected with input channel acquisition circuit 40.
In this kind of embodiment, through setting up second diode D2, can be when the self-checking circuit is the self-checking state, prevent to produce in the relay contact detection device of this application that external voltage flows in under the circumstances that the first contact of relay under test and second contact are closed, lead to appearing damaging the circumstances of circuit and power among the relay contact detection device, can ensure the safety of the relay contact detection device of this application, reliability effectively through setting up second diode D2 promptly.
The specific circuit configuration of the input channel acquisition circuit 40 can be set and adjusted as required, for example, in an embodiment of the present invention, the input channel acquisition circuit 40 may include:
a voltage division filter circuit 41 having an input terminal as an input terminal of the input channel acquisition circuit 40;
the input end is connected with the output end of the voltage division filter circuit 41, and the output end is used as the first isolation circuit 42 of the output end of the input channel acquisition circuit 40.
Through the voltage division filter circuit 41, the influence of interference can be effectively avoided, and through the first isolation circuit 42, the isolation of analog and digital circuits can be realized, and the anti-interference capability of the system is improved.
Furthermore, considering that the conventional isolation circuit generally adopts an optocoupler as an isolation device, the optocoupler realizes the conversion from an optical signal to an electrical signal through a light emitting diode, and the reliability of the light emitting diode is affected by the grating problem. Thus, the first isolation circuit 42 of the present application may be a capacitive chip based first isolation circuit 42. The capacity isolation chip transmits signals in the form of an electric field, has high reliability, and adopts SiO 2 Has stronger insulation advantage, the applicationIn fig. 4, a first isolation circuit 42 based on a separation-tolerant chip is used.
In one embodiment of the present invention, the voltage division filter circuit 41 may include:
a first resistor R1 having a first end serving as an input end of the voltage-dividing filter circuit 41 and a second end connected to a first end of the second resistor R2;
a second resistor R2 having a second end connected to the first end of the third resistor R3 and the first end of the first capacitor C1, respectively, and a connection end serving as an output end of the voltage division filter circuit 41;
a third resistor R3 with a second end grounded;
and a second terminal of the first capacitor C1 is grounded.
The voltage division filter circuit 41 in this embodiment has high reliability, and the voltage division can be realized by the first resistor R1, the second resistor R2 and the third resistor R3, and the filtering can be realized by the first capacitor C1.
Further, referring to fig. 4, the method may further include:
a voltage stabilizing diode D4 with the negative electrode connected with the second end of the first resistor R1 and the first end of the second resistor R2 respectively and the positive electrode grounded;
the negative pole is connected with the first end of the first resistor R1, and the positive pole is grounded TVS diode D3.
Surge current impact can be effectively avoided through TVS diode D3, and zener diode D4 can further stabilize voltage, and the voltage level that the guarantee transmits to first isolation circuit 42 accords with the requirement of first isolation circuit 42.
In one embodiment of the present invention, the method further comprises:
and a second isolation circuit 50 disposed between the controller 30 and the driving circuit 10.
Like the first isolation circuit 42, the second isolation circuit 50 in this embodiment may be based on the second isolation circuit 50 of the capacitive isolation chip, and has high reliability and stronger isolation advantage.
The specific circuit configuration of the first isolation circuit 42 and the second isolation circuit 50 can be set as required, for example, in a specific case, a four-channel isolation chip ISOW7840FDWE can be selected, and has a 5000V isolation withstand voltage, and a 3.3V primary terminal voltage can generate a 3.3V voltage and a 75mA load current. In the embodiment of fig. 3, the second isolation circuit 50 is powered by the first isolation circuit 42, and ISOW7840FDWE is a capacitive isolation chip capable of generating an isolated power supply, i.e., an isolated power supply does not need to be additionally provided, thereby being beneficial to reducing the cost.
By applying the technical scheme provided by the embodiment of the invention, the inaccuracy of the relay contact state detection in the traditional scheme is considered, and is often caused by the abnormality of the detection device, so that the relay contact detection device not only can detect whether the first contact and the second contact of the relay to be detected are in a conducting state or a disconnecting state, but also can determine whether the relay contact detection device can pass self-checking by using the self-checking circuit 20.
Specifically, the driving circuit 10 may output a first electrical signal according to a control rule of the controller 30, when the self-checking circuit 20 is in a self-checking state, the self-checking circuit 20 may transmit the first electrical signal to the input channel collecting circuit 40, and transmit the received electrical energy of the second power source V2 to the controller 30, so that when the controller 30 receives the electrical energy of the second power source V2, and receives the first electrical signal through the input channel collecting circuit 40, it may be determined that the relay contact detection device passes through the self-checking. When the self-checking circuit 20 is in a non-self-checking state, the self-checking circuit 20 may transmit the first electrical signal to the first contact of the relay to be tested, and the controller 30 may determine whether the first electrical signal is received through the input channel acquisition circuit 40 after controlling the self-checking circuit 20 to be in the non-self-checking state, if yes, determine that the first contact and the second contact of the relay to be tested are in a conducting state, and if not, determine that the first contact and the second contact of the relay to be tested are in a turn-off state, that is, when the self-checking circuit 20 is in the non-self-checking state, the relay contact detection apparatus of the present application may implement on-off detection of the first contact and the second contact of the relay to be tested.
In summary, because the scheme of the application can be used for self-checking the relay contact detection device, the condition that the contact state detection of the relay to be detected is inaccurate due to the self abnormality of the relay contact detection device can be avoided, namely, the accuracy in detecting the contact state of the relay can be effectively improved.
Corresponding to the above embodiments of the relay contact detection device, embodiments of the present invention further provide a train signal control system, which may include the relay contact detection device in any of the above embodiments, and may be referred to in correspondence with the above.
It is further noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The principle and the implementation of the present invention are explained in the present application by using specific examples, and the above description of the embodiments is only used to help understanding the technical solution and the core idea of the present invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (15)
1. A relay contact detection device, comprising:
the driving circuit is connected with the controller and the first power supply and used for receiving the electric energy of the first power supply and outputting a first electric signal according to the control rule of the controller;
the self-checking circuit is respectively connected with the driving circuit, the controller, the second power supply, the input channel acquisition circuit and the first contact of the relay to be tested, and is used for transmitting the first electric signal to the input channel acquisition circuit and transmitting the received electric energy of the second power supply to the controller when the self-checking circuit is in a self-checking state; when the relay is in a non self-checking state, the first electric signal is transmitted to a first contact of the relay to be tested;
the controller is connected with the input channel acquisition circuit and is used for determining that the relay contact detection device passes the self-detection when receiving the electric energy of the second power supply and receiving the first electric signal through the input channel acquisition circuit after controlling the self-detection circuit to be in a self-detection state; after the self-checking circuit is controlled to be in a non self-checking state, whether the first electric signal is received through the input channel acquisition circuit or not is judged, if yes, the first contact and the second contact of the relay to be tested are determined to be in a conducting state, and if not, the first contact and the second contact of the relay to be tested are determined to be in a disconnecting state;
and the input channel acquisition circuit is connected with the second contact of the tested relay.
2. The relay contact detection device of claim 1, wherein the first electrical signal is a pulse signal having a duty cycle controlled by the controller.
3. The relay contact detection device of claim 1, wherein the controller is configured to control the self-test circuit to be in a self-test state according to a preset period.
4. The relay contact detection apparatus of claim 1, wherein the controller is further configured to:
and outputting first prompt information when the self-checking of the relay contact detection device is determined not to pass.
5. The relay contact detection device of claim 1, further comprising:
and the first diode is arranged between the first contact of the relay to be tested and the self-detection circuit in series, and the cathode of the first diode is connected with the first contact of the relay to be tested.
6. The relay contact detection device of claim 1, further comprising:
the second diode is arranged between the self-checking circuit and the input channel acquisition circuit in series, and the cathode of the second diode is connected with the input channel acquisition circuit.
7. The relay contact detection device of claim 1, wherein the input channel acquisition circuit comprises:
the input end of the voltage division filter circuit is used as the input end of the input channel acquisition circuit;
the input end of the first isolation circuit is connected with the output end of the voltage division filter circuit, and the output end of the first isolation circuit is used as the output end of the input channel acquisition circuit.
8. The relay contact detection device of claim 7, wherein the first isolation circuit is a capacitive isolation chip based first isolation circuit.
9. The relay contact detection device of claim 7, wherein the voltage dividing filter circuit comprises:
the first end of the first resistor is used as the input end of the voltage division filter circuit, and the second end of the first resistor is connected with the first end of the second resistor;
the second end of the second resistor is respectively connected with the first end of the third resistor and the first end of the first capacitor, and the connecting end of the second resistor is used as the second resistor of the output end of the voltage division filter circuit;
the third resistor with the second end grounded;
the second end of the first capacitor is grounded.
10. The relay contact detection device of claim 9, further comprising:
the negative electrode of the voltage stabilizing diode is respectively connected with the second end of the first resistor and the first end of the second resistor, and the positive electrode of the voltage stabilizing diode is grounded;
and the negative electrode of the TVS diode is connected with the first end of the first resistor, and the positive electrode of the TVS diode is grounded.
11. The relay contact detection device of claim 1, wherein the self-test circuit comprises a first relay;
the first end and the second end of a control coil of the first relay are respectively connected with the positive electrode of a third power supply and the controller, the movable end of a first controlled branch of the first relay is connected with the output end of the driving circuit, the first immovable end and the second immovable end of a first controlled branch of the first relay are respectively connected with the first contact of the tested relay and the input channel acquisition circuit, the movable end of a second controlled branch of the first relay is connected with the second power supply, the first immovable end of a second controlled branch of the first relay is suspended, and the second immovable end of the second controlled branch of the first relay is connected with the controller.
12. The relay contact detection device of claim 1, further comprising:
a second isolation circuit disposed between the controller and the drive circuit.
13. The relay contact detection device of claim 1, further comprising:
an isolated power supply circuit disposed between the drive circuit and the first power supply.
14. The relay contact detection device of claim 1, wherein the drive circuit comprises:
the first end of the fourth resistor is connected with the controller and is used as the control end of the driving circuit, and the second end of the fourth resistor is respectively connected with the control end of the first switching tube, the first end of the fifth resistor and the first end of the second capacitor;
the fifth resistor with the second end grounded;
the second capacitor with the second end grounded;
the first switch tube is connected with the first end of the sixth resistor at the first end and grounded at the second end;
the second end of the sixth resistor is connected with the first end of the seventh resistor and the control end of the second switching tube respectively;
the second end of the seventh resistor is connected with the second end of the second switching tube, and the connecting end of the seventh resistor is used as the input end of the driving circuit and is connected with the first power supply;
the first end of the second switch tube is used as the output end of the driving circuit.
15. A train signal control system comprising a relay contact detection arrangement according to any one of claims 1 to 14.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111021009.7A CN115728626A (en) | 2021-09-01 | 2021-09-01 | Train signal control system and relay contact detection device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111021009.7A CN115728626A (en) | 2021-09-01 | 2021-09-01 | Train signal control system and relay contact detection device thereof |
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| CN115728626A true CN115728626A (en) | 2023-03-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111021009.7A Pending CN115728626A (en) | 2021-09-01 | 2021-09-01 | Train signal control system and relay contact detection device thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116360245A (en) * | 2023-05-31 | 2023-06-30 | 北京全路通信信号研究设计院集团有限公司 | Dynamic acquisition circuit and transponder transmission system |
| CN117250497A (en) * | 2023-11-20 | 2023-12-19 | 苏州联讯仪器股份有限公司 | A relay self-checking circuit and power supply equipment |
| CN117434439A (en) * | 2023-12-20 | 2024-01-23 | 天津航空机电有限公司 | Circuit and method for collecting state of large-scale device with auxiliary contact |
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2021
- 2021-09-01 CN CN202111021009.7A patent/CN115728626A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116360245A (en) * | 2023-05-31 | 2023-06-30 | 北京全路通信信号研究设计院集团有限公司 | Dynamic acquisition circuit and transponder transmission system |
| CN116360245B (en) * | 2023-05-31 | 2023-08-18 | 北京全路通信信号研究设计院集团有限公司 | Dynamic acquisition circuit and transponder transmission system |
| CN117250497A (en) * | 2023-11-20 | 2023-12-19 | 苏州联讯仪器股份有限公司 | A relay self-checking circuit and power supply equipment |
| CN117250497B (en) * | 2023-11-20 | 2024-04-09 | 苏州联讯仪器股份有限公司 | Relay self-checking circuit and power supply equipment |
| CN117434439A (en) * | 2023-12-20 | 2024-01-23 | 天津航空机电有限公司 | Circuit and method for collecting state of large-scale device with auxiliary contact |
| CN117434439B (en) * | 2023-12-20 | 2024-04-09 | 天津航空机电有限公司 | Circuit and method for collecting state of large-scale device with auxiliary contact |
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