CN216851939U - Pin signal processing device and pin signal processing circuit - Google Patents
Pin signal processing device and pin signal processing circuit Download PDFInfo
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- CN216851939U CN216851939U CN202122856195.8U CN202122856195U CN216851939U CN 216851939 U CN216851939 U CN 216851939U CN 202122856195 U CN202122856195 U CN 202122856195U CN 216851939 U CN216851939 U CN 216851939U
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Abstract
The utility model relates to a pin signal processing circuit, which is connected with an interface, and is characterized by comprising: the first lead group comprises at least one lead, and the lead is used for connecting a pin in the interface; the first connecting part is used for transmitting signals and is connected with each wire in the first wire group; the first switch is connected to a first configuration voltage, and the first switch is connected with the second switch; the first connection portion is connected with the first switch, and the second switch controls whether the first switch outputs the first configuration voltage to the first connection portion. Compared with the prior art, the utility model provides the pin signal processing circuit which realizes on-off control of the configuration circuit between the configuration voltage and the pins of the interface through the cooperation of the switches.
Description
Technical Field
The utility model relates to the technical field of pin monitoring, in particular to a pin signal processing circuit and a pin signal processing device.
Background
An On-Board Diagnostics (OBD) is a detection system for monitoring whether an automobile has faults or exhaust gas exceeds the standard, the monitoring objects of the OBD are a sensor, an actuator and an ECU (electronic control unit), the working signals of components related to emission are monitored in real time to judge whether the automobile exhaust emission exceeds the standard, if some signals are abnormally changed and the phenomenon that the emission exceeds the standard occurs, the ECU of the OBD system judges that the components or circuits related to the signals have faults, and a fault indicator lamp is lightened and corresponding fault information is stored. When the OBD system is overhauled, the OBD system needs to communicate with a pin signal processing device through a 16-pin of an OBD diagnosis seat, and the pin signal processing device needs to configure the input voltage of the pin of the OBD diagnosis seat in diagnosis so as to transmit diagnosis information to the OBD system in diagnosis.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the prior art and provide a pin monitoring circuit and a vehicle fault diagnosis device, which are ingenious in structural design and can output specific voltage to pins of an OBD diagnosis seat of a vehicle.
The utility model is realized by the following technical scheme: a pin signal processing circuit, the pin signal processing circuit connected to an interface, comprising: the first lead group comprises at least one lead, and the lead is used for connecting a pin in the interface; the first connecting part is used for transmitting signals and is connected with each wire in the first wire group; the first switch is connected to a first configuration voltage, and the first switch is connected with the second switch; the first connection portion is connected with the first switch, and the second switch controls whether the first switch outputs the first configuration voltage to the first connection portion.
Compared with the prior art, the pin signal processing circuit provided by the utility model realizes on-off control of the configuration circuit between the configuration voltage and the pins of the interface through the matching of the switches, and when the pins of the interface are conducted with the circuit between the configuration voltage, the pins connected into the interface can output the configuration voltage, so that the voltage configuration can be carried out on the pins of the fault diagnosis seat of the vehicle. The switches which are matched with the control of the on-off of the configuration circuit are controlled by different control signals, so that the configuration of the input voltage of the pin of the fault diagnosis seat of the vehicle can be controlled by using a plurality of control conditions.
Further, still include: a second wire set comprising at least one wire; and a second connection portion connected to each of the wires in the second wire group, the second connection portion being connected to the second switch; the second switch is connected to a second configuration voltage, and the second switch controls whether to output the second configuration voltage to the second connecting part. Through the scheme, the second configuration voltage can be configured for the pins of the traffic-fear fault diagnosis seat electrically connected with the second connecting part.
Further, a third switch is included, the third switch is connected to the first switch, and the third switch outputs the first configuration voltage to the first switch; the third switch is connected with a plurality of different preset voltages, and the third switch controls the voltage value of the first configuration voltage to be switched to one of the preset voltage values. Through the scheme, the configuration voltages with different voltage values can be provided for the circuit.
Further, the switch further comprises a fourth switch, the fourth switch is connected between the first switch and the first connection, and the fourth switch controls whether the signal is transmitted between the first switch and the first connection. By this scheme, it is possible to prevent an irrelevant signal in the connection portion from entering the circuit of the voltage configuration when the voltage configuration is not performed.
Further, the power supply further comprises a fifth switch, wherein the fifth switch is connected with the third switch, and the third switch outputs the first configuration voltage to the fifth switch; the fifth switch is connected with the fourth switch, and the fifth switch controls whether to output the first configuration voltage to the fourth switch; and the fourth switch controls the first connecting part to be connected with the first switch, or the fourth switch controls the first connecting part to be connected with the fifth switch. The voltage configuration can be carried out on the pins of the fault diagnosis seat of the vehicle through the scheme.
Further, it includes: a third wire set, said third wire set including at least one said wire, said fifth switch connected to said third wire set, said fifth switch controlling whether to output said first configuration voltage to said wires in said third wire set. Through the scheme, the voltage configuration can be carried out on the pins of the fault diagnosis seat of the vehicle.
Further, still include: a fourth wire set comprising at least one of the wires; a third connection portion connected to each of the wires in the fourth wire group; the sixth switch is respectively connected with the third connecting part and the first connecting part, and is also connected with one pin; the sixth switch controls whether the pin connected with the sixth switch is connected with the third connecting part, and/or the sixth switch controls whether the pin connected with the sixth switch is connected with the first connecting part. By this scheme, one pin of the failure diagnosis seat of the vehicle can be connected to one of the first connection portion or the second connection portion.
Further, still include: a fourth wire set comprising at least one of the wires; a third connection portion connected to each of the wires in the fourth wire group, the fourth switch further connected to the third connection portion; and the comparator comprises a first comparison unit, one input end of the first comparison unit is connected with the first configuration voltage, the other input end of the first comparison unit is connected with the fourth switch, and whether the fourth switch control signal is transmitted between the third connection part and the comparator or not is judged. The scheme can detect the voltage high and low states of the pins of the fault diagnosis seat of the vehicle.
Further, the comparator comprises a second comparing unit, one input end of the second comparing unit is connected to the first configuration voltage, and the other input end of the second comparing unit is connected to the fourth switch; the fourth switch controls the third connecting part to be connected with the first comparing unit, or the fourth switch controls the third connecting part to be connected with the second comparing unit. The scheme can detect the voltage high and low states of the pins of the fault diagnosis seat of the vehicle.
Further, it includes: a fifth wire set comprising at least one of the wires; and a seventh switch, said seventh switch being connected to a third configuration voltage, said seventh switch being connected to each of said conductive lines in said fifth group of conductive lines, said seventh switch controlling whether to output said third configuration voltage to said fifth group of conductive lines. The voltage configuration can be carried out on the pins of the fault diagnosis seat of the vehicle through the scheme.
Further, still include: a pin switch connected between the pin and the wire, the pin switch controlling whether a signal is transmitted between the pin and the wire. By the scheme, signals in irrelevant pins can be prevented from entering the circuit during voltage configuration and voltage detection of the pins.
Based on the same utility model concept, the utility model also provides a pin signal processing device, which is characterized by comprising: an interface; and a pin signal processing circuit, the pin signal processing circuit being any one of the pin signal processing circuits described in the above embodiments, the pin signal processing circuit being connected to the interface.
Drawings
Fig. 1 is a schematic configuration diagram of a vehicle failure diagnosis apparatus of the present invention.
Fig. 2 is a circuit block diagram of the pin monitoring circuit of the present invention.
Fig. 3 is an exemplary pin diagram of the first switch Q1 and the second switch Q2 in the embodiment.
Fig. 4 is an exemplary pin diagram of the third switch K1 in the embodiment.
Fig. 5 is an exemplary pin diagram of the fifth switch Q3 in an embodiment.
Fig. 6 is an exemplary pin diagram of the fourth switch K2 in the embodiment.
Fig. 7 is an exemplary pin diagram of the comparator U1 in an embodiment.
Fig. 8 is an exemplary pin diagram of the sixth switch K3 in the embodiment.
The technical scheme of the utility model is described in detail in the following with reference to the accompanying drawings.
Detailed Description
Please refer to fig. 1, which is a schematic structural diagram of a vehicle fault diagnosis device according to the present invention. The vehicle fault diagnosis device comprises an interface 10, a pin signal processing circuit 20 and a control unit 30, wherein the interface 10 comprises a plurality of pins connected with pins of an OBD diagnosis seat of a vehicle during diagnosis, and the control unit 30 controls the pin signal processing circuit 20 to realize voltage detection and voltage configuration on the pins of the interface 10. In this embodiment the interface 10 is provided with 16 pins (not all shown). The control unit 30 includes, but is not limited to, one or a combination of any of MCU, MPU, DPU, CPU, and the like.
Specifically, referring to fig. 2, which is a circuit block diagram of the pin signal processing circuit 20 of the vehicle fault diagnosis device of the present invention, the pin signal processing circuit 20 includes a plurality of pin switches D1, a first wire group, a first connection portion L1, a first switch Q1, a second switch Q2, a third switch K1, a fourth switch K2, and a multiplexer M1 connected to the control unit 30. The first wire set includes at least one wire, and the wires of the first wire set are electrically connected to the pins in the interface 10 through the pin switch D1. The first connection portion L1 is a common line for transmitting electrical signals, and the first connection portion L1 is electrically connected to the wires of the first wire group. In an implementation, the pin switch D1 may be an optical coupler, and the first connection portion L1 and the second connection portion L2 may be buses of a circuit.
The first switch Q1 is switched between on and off statesAlternatively, to control the first configuration voltage VaTo the first connection portion L1. In an example of the embodiment, the first switch Q1 includes an input terminal, an output terminal, and a controlled terminal, and the input terminal of the first switch Q1 is connected to the first configuration voltage Va. In a specific implementation, the first switch Q1 may be selected as a transistor switch or a MOS switch, and the MOS switch may be selected as any one or more of CMOS, PMOS, NMOS, RCMOS, RPMOS, RNMOS, and the like. As shown in fig. 3, the input terminal of the first switch Q1 is an S port (or source/output/input terminal), the output terminal is a D port (or drain/output/input terminal), and the controlled terminal is a G port (or gate/controlled terminal).
The second switch Q2 includes a first switch unit that controls the first switch Q1 to switch between on and off states. In an example of the present embodiment, the first switch unit includes a controlled terminal, an input terminal and an output terminal, the controlled terminal of the first switch unit is connected to the output terminal of the multiplexer M1, the input terminal of the first switch unit is electrically connected to the controlled terminal of the first switch Q1, and the output terminal of the first switch unit is grounded. In an implementation, the second switch Q2 can be selected to be a transistor switch or a mos switch, and the controlled terminal of the second switch Q2 is a G port (or a gate/controlled terminal), the input terminal is a D port (or a drain/output/input terminal), and the output terminal is an S port (or a source/output/input terminal), as shown in fig. 3.
The third switch K1 is connected with a plurality of preset voltages V with different voltage valuesxThe output end of the first voltage source outputs a first configuration voltage VaThe third switch K1 controls the first configuration voltage V according to the signal of the control unit 30aIs switched to one of the preset voltages, and the output terminal of the third switch K1 is electrically connected with the input terminal of the first switch Q1. In one embodiment, the third switch K1 can be a single-pole double-throw relay or a double-pole double-throw relay, and as shown in fig. 4, the input/output terminals of the third switch K1 are 1 port, 2 port, 3 port, 4 port, 5 port, 6 port, 7 port and 8 port. Optionally, the 3 port and the 6 port of the third switch K1 can be simultaneously accessed to 12v Voltage (preset voltage V)x) And 5V of voltage (preset voltage V) can be simultaneously accessed to the 1 port and the 4 portx) 2-port and 5-port for outputting a first configuration voltage Va. The 7 port and the 8 port can be accessed with power signals and/or used for receiving control signals.
The fourth switch K2 is electrically connected to the output terminals of the first connection portion L1 and the first switch Q1, respectively, and the fourth switch K2 controls whether or not a signal is transmitted between the first connection portion L1 and the first switch Q1.
Thus, the pin signal processing circuit 20 can output the first configuration voltage V to the pin of the OBD diagnostic socket in communication with the first connection portion L1 (i.e., the pin of the OBD diagnostic socket to which the pin of the interface 10 electrically connected to the first wire group is butted)a. Configuring or outputting a first configuration voltage V to a pinaAt this time, the control unit 30 controls the output terminal of the third switch K1 and one of the preset voltages VxWhen the first configuration voltage V is connected, the output end of the third switch K1 outputs the first configuration voltage VaVoltage value of (d) and a predetermined voltage VxThe voltage values are consistent. The output terminal of the third switch K1 may supply the first configuration voltage VaThe output is to the controlled terminal of the first switch Q1, and the controlled terminal of the first switch Q1 is turned on. At the same time, the control unit 30 controls the fourth switch K2 to form a path between the first connection portion L1 and the first switch Q1, so that the first configuration voltage V is obtained aTransmitted to the first connection L1 via the first switch Q1. At this time, the pin switch D1 electrically connected to the wires of the first wire group is turned on, so as to connect the first configuration voltage V at the first connection portion L1aThrough pins of the interface 10 to corresponding pins on the OBD diagnostic mount.
When the control unit 30 sends a control signal to the controlled terminal of the first switch unit of the second switch Q2 through the multiplexer M1 to turn on the first switch unit of the second switch Q2, the first configuration voltage V output by the output terminal of the third switch K1aWill go to ground via the second switch Q2 and not go to the first switch Q1. Therefore, the circuit applies the first arrangement voltage V to the pin of the OBD diagnostic socket connected to the first connection portion L1aWhen the second switch Q2 is configured, the first unit of the second switch Q2 is also controlled to be turned off, turned off or disconnectedStatus.
Further, the pin signal processing circuit 20 further includes a second wire group and a second connection portion L2, where the second wire group includes at least one wire, and the wires of the second wire group are electrically connected to the pins in the interface 10 through the pin switch D1. The second connection portion L2 is a common line for transmitting electrical signals, and the second connection portion L2 is electrically connected to the conductive lines of the second conductive line group. The second switch Q2 also includes a second switching unit that controls a second configuration voltage V bOr not to the second connection portion L2. In an example of the present embodiment, the second switch unit includes a controlled terminal, an input terminal and an output terminal, the controlled terminal of the second switch unit is electrically connected to the control unit 30, and the input terminal of the second switch unit is connected to the second configuration voltage VbAnd is electrically connected to a second connection portion L2, the second switching element output terminal being grounded.
Thus, the pin signal processing circuit 20 can apply the second configuration voltage V to the pin of the OBD diagnostic socket in communication with the second connection portion L2 (i.e., the pin of the OBD diagnostic socket to which the pin of the interface 10 electrically connected to the second wire group is butted)bThat is, the second arrangement voltage V is outputted to the pin of the OBD diagnostic socket communicating with the second connection portion L2b. At the second configuration voltage V of the pinbWhen the second configuration voltage V is applied, the pin switch D1 electrically connected to the wires of the second wire group is turned onbVia the second connection L2 and the corresponding pin of the interface 10, to the corresponding pin on the OBD diagnostic holder. When the control unit 30 controls to make the second switch unit of the second switch Q2 conductive, the second configuration voltage VaThe ground line is entered via the second switching unit of the second switch Q2 and cannot enter the second connection portion L2. Thus, the second configuration voltage V is being applied bIn the configuration of (3), the control unit 30 needs to control the second switch unit of the second switch Q2 to be in the off or cut-off state, so as to make the second configuration voltage VbCan be transferred to the second connection portion L2.
Further, the pin signal processing circuit 20 further includes a fifth switch Q3, and the fifth switch Q3 includes a third switching unit. The third switching unit is based on the control unit 30 and/or multiplexingThe signal output by the M1 controls the first configuration voltage VaTo the fourth switch K2. In one example of the present embodiment, the third switching unit includes a slave terminal, an input terminal, and an output terminal, and the slave terminal of the third switching unit is electrically connected to the multiplexer M1; the input end of the third switch unit is connected to the first configuration voltage V of the third switch K1aAnd is electrically connected with the first connection portion L1 through the fourth switch K2; the output end of the third switching unit is grounded. In an implementation, the fifth switch Q3 can be selected to be a transistor switch or a mos switch, and the controlled terminal of the fifth switch Q3 is a G port (or a gate/controlled terminal), the input terminal is a D port (or a drain/output/input terminal), and the output terminal is an S port (or a source/output/input terminal), as shown in fig. 5.
Thus, the pin signal processing circuit 20 can perform the first configuration voltage V on the pin of the OBD diagnosis socket communicated with the first connection portion L1 (i.e. the pin of the OBD diagnosis socket to which the pin of the interface 10 electrically connected with the first wire group is butted)aI.e., outputting the first configuration voltage V to the pin of the OBD diagnostic socket communicating with the first connection portion L1a. When performing voltage configuration, the control unit 30 controls the fourth switch K2 to switch the first connection portion L1 to be conductive with the output end of the third switch K1, so as to enable the third switch K1 to output the first configuration voltage VaCan be transmitted to the first connection portion L1 through the fourth switch K2, and at this time, the pin switch D1 electrically connected to the wires of the first wire group is turned on to connect the first configuration voltage VaThrough corresponding pins of the interface 10 to corresponding pins on the OBD diagnostic tray. When the control unit 30 controls the third switch unit of the fifth switch Q3 to be turned on through the multiplexer M1, the third switch K1 outputs the first configuration voltage VaWill go to ground via the third switching unit of the fifth switch Q3 and not to the fourth switch K2. Therefore, when the control unit 30 controls the fourth switch K2 to turn on the output terminals of the first connection portion L1 and the third switch K1, the third switch unit of the fifth switch Q3 needs to be controlled to be in an off state or an off state at the same time, so as to enable the first configuration voltage V to be set aTransmitted to the first connection L1 via the fourth switch K2.
Further, the pin signal processing circuit 20 further includes a third wire group, where the third wire group includes at least one wire, and the wires of the third wire group are electrically connected to the pins in the interface 10 through the pin switch D1. The fifth switch Q3 further comprises a fourth switching unit controlling the first configuration voltage V according to the signal of the control unit 30aWhether or not to the wire of the third wire set, in an example of the present embodiment, the fourth switch unit includes a controlled terminal, an input terminal and an output terminal, the controlled terminal of the fourth switch unit is electrically connected to the control unit 30, and the input terminal of the fourth switch unit is connected to the first configuration voltage V of the third switch K1aAnd is electrically connected with the lead of the third lead group, and the output end of the fourth switch unit is grounded.
Thus, the pin signal processing circuit 20 can apply the first configuration voltage V to the pin of the OBD diagnostic socket that is butted by the pin in the interface 10 electrically connected with the third wire groupaI.e. a first configuration voltage V can be output to a corresponding pin of an OBD diagnostic socket electrically connected to the third wire seta. When the voltage configuration is performed, the pin switch D1 is turned on to make the third switch K1 output the first configuration voltage V aThe first configuration voltage V is transmitted to the pin of the interface 10 through the third wire group and the pin switch D1aThrough a corresponding pin in the interface 10 to a corresponding pin of the OBD diagnostic receptacle. When the control unit 30 controls the fourth switch unit of the fifth switch Q3 to be turned on, the third switch K1 outputs the first configuration voltage VaWill go to ground via the fourth switching unit of the fifth switch Q3 and not to the conductor of the third conductor set. Thus, the first configuration voltage V is applied to the pins of the OBD diagnostic socket to which the pins in the interface 10 electrically connecting the third wire set are connectedaThe fourth unit of the fifth switch Q3 is required to be in an open or off state.
Further, the pin signal processing circuit 20 further includes a fourth wire group, a third connection portion L3 and a comparator U1, where the fourth wire group includes at least one wire, and the wires of the fourth wire group are electrically connected to the pins in the interface 10 through the pin switch D1. The third connection portion L3 is a common line for transmitting electrical signals, and the third connection portion L3 is electrically connected to the wires of the fourth wire group. The comparator U1 includes a first comparing unit and a second comparing unit, wherein one input terminal of the first comparing unit is electrically connected to the output terminal of the third switch K1, and the other input terminal is electrically connected to the third connecting portion L3 through the fourth switch K2. One input end of the second comparing unit is electrically connected with the output end of the third switch K1, and the other input end of the second comparing unit is electrically connected with the third connecting part L3 through the fourth switch K2; the fourth switch K2 switches the third connection part L3 to be electrically connected with the first comparison unit or the second comparison unit according to a signal of the control unit 30; the output ends of the first comparison unit and the second comparison unit of the comparator U1 are electrically connected with the multiplexer M1. In a specific implementation, the third connection portion L3 may be a bus of a circuit.
In an implementation, the fourth switch K2 can be a double-pole double-throw relay or a combination of two single-pole single-throw relays, and as shown in fig. 6, the input/output terminals of the fourth switch K2 are 1 port, 2 port, 3 port, 4 port, 5 port, 6 port, 7 port and 8 port. Optionally, a 1 port of the fourth switch K2 is connected to the first switch Q1, a 2 port is connected to the first connection L1, a 3 port is connected to the third switch Q3, a 4 port is connected to an input of the first or second comparing unit of the comparator U1, a 5 port is connected to the third connection L3, a 6 port is connected to an input of the second or first comparing unit of the comparator U1, and 7 and 8 ports can be connected to a power supply signal and/or used for receiving a control signal.
As shown IN fig. 7, the two input terminals of the first comparing unit of the comparator U1 are the IN1+ port, the IN 1-port, and the output terminal is the OUT1 port; the two input ends of the second comparing unit of the comparator U1 are an IN2+ port and an IN 2-port, and the output end is an OUT2 port.
Thus, the pin signal processing circuit 20 can detect the voltage output by the pin of the OBD diagnostic socket in communication with the third connecting portion L3 (i.e., the OBD diagnostic socket pin to which the pin of the interface 10 electrically connected to the fourth wire group is butted), that is, can detect the voltage level state of the pin of the OBD diagnostic socket in communication with the third connecting portion L3. Voltage at the active pin During detection, the pin switch D1 electrically connected to the lead of the fourth lead group is turned on, so that the voltage received by the pin of the interface 10 from the OBD diagnostic socket pin is transmitted to the third connecting portion L3, and then enters the first comparing unit or the second comparing unit of the comparator U1 through the fourth switch K2. The first comparison unit of the comparator U1 may compare the voltage received by the pin of the interface 10 from the pin of the OBD diagnostic socket with the first configuration voltage V output by the third switch K1aThe voltage received by the pin of the interface 10 from the pin of the OBD diagnostic socket may be compared with the first configuration voltage V output by the third switch K1 by the second comparison unitaAfter comparison, the signals output by the first and second comparison units may be transmitted to the control unit 30 through the multiplexer M1, and the signals indicate the output voltage of the OBD diagnosis socket pin relative to the first configuration voltage VaHigh-low state of (1).
Further, the pin signal processing circuit 20 further includes a sixth switch K3, the sixth switch K3 is electrically connected to the first connection portion L1 and the third connection portion L3 and electrically connected to at least one pin of the interface 10, and the sixth switch K3 switches a pin to be electrically connected to the first connection portion L1, or to be electrically connected to the third connection portion L3, or to be simultaneously connected to the first connection portion L1 and the third connection portion L3 according to a signal of the control unit 30 (not limited to the control unit 30). In a specific embodiment, the sixth switch K3 can be selected as a double-pole double-throw relay, and as shown in fig. 8, the input/output terminals of the sixth switch K3 are 1 port, 2 port, 3 port, 4 port, 5 port and 6 port. Alternatively, the 1 port and the 4 port of the sixth switch K3 may be connected to the same pin on the interface 10, the 2 port and the 3 port are connected to the first connection portion L1 and the third connection portion L3, respectively, and the 5 port and the 6 port may be connected to a power signal and/or used for receiving a control signal.
Therefore, when the sixth switch K3 controls the pin of the interface 10 to be electrically connected with the first connection part L1, the first configuration voltage V can be applied to the pin of the OBD diagnosis socket docked with the pin of the interface 10aI.e. a first configuration voltage V may be output to a pin of an OBD diagnostic socket to which a pin of the interface 10 is dockeda。
When the sixth switch K3 controls the pin of the interface 10 to be electrically connected to the third connection portion L3, the pin of the OBD diagnostic socket that is docked with the pin of the interface 10 may be detected as an output voltage.
In addition, when the sixth switch K3 is connected to only one pin of the interface 10 and the control unit 30 controls the sixth switch K3 to make the first connecting portion L1 and the third connecting portion L3 simultaneously conduct, the first connecting portion L1 is communicated with the third connecting portion L3 through the pin. Thus, an electrical signal with the pin of the first connection portion L1 may be transmitted to the third connection portion L3 through the pin connected to the sixth switch K3, and the third connection portion L3 transmits the electrical signal to the first comparison unit or the second comparison unit of the comparator U1 through the fourth switch K2. Thus, the comparator U1 may detect the voltage of the pin on the interface 10 connected to the third connection unit L3, or may detect the voltage of the pin on the interface 10 connected to the first connection unit L1. Likewise, the first configuration voltage V aThe data may be transmitted to the pin on the interface 10 connected to the first connection portion L1 through the sixth switch K3, or may be transmitted to the pin on the interface 10 connected to the third connection portion L3 through the sixth switch K3 and the pin connected to the sixth switch K3.
Further, the pin signal processing circuit 20 further includes a fifth wire group and a seventh switch Q4 controlled by the control unit 30, where the fifth wire group includes at least one wire, and the wire of the fifth wire group is electrically connected to a pin in the interface through the pin switch D1; the input end of the seventh switch Q4 is connected with a third configuration voltage VcAnd the output end of the first lead group is electrically connected with the lead of the fifth lead group. In an implementation, the seventh switch Q4 may be a controllable electronic switching element such as a triode switch or a mos switch.
Thus, the pin signal processing circuit 20 can apply the third configuration voltage V to the pin of the OBD diagnostic socket butted with the pin of the interface 10 electrically connected with the fifth wire groupcI.e. a third configuration voltage V may be output to a pin of the interface 10 electrically connected to the fifth set of conductorsc. During voltage configuration, the control unit 30 will control the seventh switch Q4 to be turned on, and at the same time, the pin switch D1 electrically connected to the fifth wire group to be turned on, so as to make the third configuration voltage VcThe third configuration voltage V is transmitted to the pin of the interface 10 via the seventh switch Q4, the fifth wire group and the pin switch D1 in sequencecTo the pins of the OBD diagnostic receptacle to which the pins of the interface 10 electrically connected to the fifth wire set are butted.
In fact, the multiplexer M1 in this embodiment is used as a relay station between the control unit 30 and other elements in the pin control circuit 20 to transmit electrical signals when the pins of the control unit 30 are insufficient, and the electrical signals received by or sent to the elements in the pin control circuit 20 by the multiplexer M1 can be directly received or sent by the control unit 30.
Compared with the prior art, the vehicle fault diagnosis device disclosed by the utility model can be used for carrying out voltage configuration on a plurality of pins of the vehicle OBD diagnosis seat through the pin signal processing circuit 20, and simultaneously can be used for detecting the high and low states of the output voltage of the pins of the vehicle OBD diagnosis seat.
The pin signal processing circuit of the present invention can be applied to a fault diagnosis apparatus for processing a pin signal of a fault diagnosis seat of a vehicle such as a train or an airplane in the same manner as the vehicle fault diagnosis apparatus of the present embodiment.
The present invention is not limited to the above-described embodiments, and various modifications and variations of the present invention are intended to be included within the scope of the claims and the equivalent technology of the present invention if they do not depart from the spirit and scope of the present invention.
Claims (12)
1. A pin signal processing circuit, the pin signal processing circuit being connected to an interface, comprising:
the first lead group comprises at least one lead, and the lead is used for connecting pins in the interface;
a first connection portion for transmitting signals, the first connection portion being connected to each of the wires in the first wire group; and
the first switch is connected to a first configuration voltage, and the first switch is connected with the second switch; the first connection portion is connected to the first switch, and the second switch controls whether the first switch outputs the first configuration voltage to the first connection portion.
2. The pin signal processing circuit according to claim 1, wherein: further comprising:
a second wire set comprising at least one wire; and
a second connection portion connected to each of the wires in the second wire group, the second connection portion being connected to the second switch; the second switch is connected to a second configuration voltage, and the second switch controls whether to output the second configuration voltage to the second connecting part.
3. A pin signal processing circuit according to claim 1, wherein: the first switch is connected with the first power supply, and the second switch outputs the first configuration voltage to the first power supply; the third switch is connected with a plurality of different preset voltages, and the third switch controls the voltage value of the first configuration voltage to be switched to one of the preset voltage values.
4. A pin signal processing circuit according to claim 3, wherein: and a fourth switch connected between the first switch and the first connection, the fourth switch controlling whether a signal is transmitted between the first switch and the first connection.
5. The pin signal processing circuit of claim 4, wherein: the first switch is connected with the second switch, and the second switch outputs the first configuration voltage to the first switch; the fifth switch is connected with the fourth switch, and the fifth switch controls whether to output the first configuration voltage to the fourth switch; and the fourth switch controls the first connecting part to be connected with the first switch, or the fourth switch controls the first connecting part to be connected with the fifth switch.
6. The pin signal processing circuit of claim 5, comprising: a third wire set, said third wire set including at least one said wire, said fifth switch connected to said third wire set, said fifth switch controlling whether to output said first configuration voltage to said wires in said third wire set.
7. The pin signal processing circuit of claim 4, further comprising:
a fourth wire set comprising at least one of the wires;
a third connection portion connected to each of the wires in the fourth wire group; and
a sixth switch, connected to the third connection portion and the first connection portion, respectively, and further connected to one of the pins; the sixth switch controls whether the pin connected with the sixth switch is connected with the third connecting part, and/or the sixth switch controls whether the pin connected with the sixth switch is connected with the first connecting part.
8. A pin signal processing circuit according to any one of claims 4-6, further comprising:
A fourth wire set comprising at least one of the wires;
a third connection portion connected to each of the wires in the fourth wire group, the fourth switch being further connected to the third connection portion; and
a comparator, wherein the comparator comprises a first comparing unit, one input end of the first comparing unit is connected to the first configuration voltage, the other input end of the first comparing unit is connected to the fourth switch, and the fourth switch control signal is transmitted between the third connecting part and the comparator or not.
9. The pin signal processing circuit according to claim 8, wherein the comparator comprises a second comparing unit, one input terminal of the second comparing unit is connected to the first configuration voltage, and the other input terminal of the second comparing unit is connected to the fourth switch; the fourth switch controls the third connecting part to be connected with the first comparing unit, or the fourth switch controls the third connecting part to be connected with the second comparing unit.
10. A pin signal processing circuit according to any one of claims 1-6, comprising:
A fifth wire set comprising at least one of the wires; and
a seventh switch, said seventh switch being connected to a third configuration voltage, said seventh switch being connected to each of said conductive lines in said fifth group of conductive lines, said seventh switch controlling whether to output said third configuration voltage to said fifth group of conductive lines.
11. A pin signal processing circuit according to any one of claims 1-6, further comprising: a pin switch connected between the pin and the wire, the pin switch controlling whether a signal is transmitted between the pin and the wire.
12. A pin signal processing apparatus, comprising:
an interface; and
a pin signal processing circuit according to any one of claims 1 to 11, the pin signal processing circuit being connected to an interface.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122856195.8U CN216851939U (en) | 2021-11-19 | 2021-11-19 | Pin signal processing device and pin signal processing circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122856195.8U CN216851939U (en) | 2021-11-19 | 2021-11-19 | Pin signal processing device and pin signal processing circuit |
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| CN216851939U true CN216851939U (en) | 2022-06-28 |
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| CN202122856195.8U Active CN216851939U (en) | 2021-11-19 | 2021-11-19 | Pin signal processing device and pin signal processing circuit |
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