CN219369145U - Vehicle speed signal simulation detector and vehicle - Google Patents
Vehicle speed signal simulation detector and vehicle Download PDFInfo
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- CN219369145U CN219369145U CN202320549956.1U CN202320549956U CN219369145U CN 219369145 U CN219369145 U CN 219369145U CN 202320549956 U CN202320549956 U CN 202320549956U CN 219369145 U CN219369145 U CN 219369145U
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Abstract
The embodiment of the utility model discloses a vehicle speed signal simulation detector and a vehicle. The vehicle speed signal simulation detector comprises a connector, a signal switching button and a circuit board; the connector is connected with the circuit board, the circuit board is connected with the signal switching button, the circuit board is used for sending out a vehicle speed analog signal in a preset frequency interval, and the signal switching button is used for adjusting the frequency of the vehicle speed analog signal according to the vehicle type; the connector comprises a first wiring terminal, a second wiring terminal and a third wiring terminal, wherein the first wiring terminal is connected with a signal receiving end of the vehicle speed sensor, the second wiring terminal is connected with a positive power end of the vehicle speed sensor, and the third wiring terminal is connected with a negative ground connection end of the vehicle speed sensor; the circuit board comprises a first switch unit, a voltage division unit, a second switch unit, a pull-up unit and a processing unit. According to the technical scheme, the speed limit test of the vehicle is realized, the safety of the vehicle in the detection link is improved, and the time required by the test link is shortened.
Description
Technical Field
The embodiment of the utility model relates to the technical field of vehicle testing, in particular to a vehicle speed signal simulation detector and a vehicle.
Background
After the new regulation of motor vehicle operation safety technical conditions falls to the ground, most vehicle types (dangerous chemicals, cargo carrying without related active safety configuration, traction, self-unloading, special vehicles and the like) have speed limiting requirements, the speed per hour is required to be lower than 79km/h or 89km/h, and the speed limiting vehicle types are increased than before. When the production workshop detects the speed limiting function of the vehicle, the speed-limiting function of the vehicle is required to be tested on a speed-measuring roller of the detection line, and the specific test flow is as follows: after the whole vehicle is off line, an adjuster drives the vehicle into a detection line to gradually detect the vehicle, and then the vehicle enters a vehicle speed measuring detection station; driving a vehicle driving wheel into a speed measuring roller to perform vehicle speed limiting test; the vehicle is stepped on by engaging the gear and gradually upshifting to the maximum speed of the vehicle. And when the instrument indicates that the vehicle speed limit value (79 km/h or 89 km/h) is exceeded, judging that the speed limit is qualified.
In the process, the vehicle driving wheel is arranged on the speed measuring roller or the free roller, the speed is high, the risk that the vehicle rushes out of the roller is great, and the potential safety hazard is great. Because the vehicle is not allowed to be braked in any form on the speed measuring roller, the whole vehicle speed limiting test link needs longer time, the vehicle is required to stand still in a free state, and the speed measuring link time is about 200s. The speed limiting test of the vehicle is limited by conditions, other feasible schemes are not available, and the test schemes are adopted for a long time, so that the scheme is potentially dangerous and takes a long time.
Disclosure of Invention
The utility model provides a vehicle speed signal simulation detector and a vehicle, which can realize vehicle speed limit test, improve the safety of the vehicle in the detection link and reduce the time required in the test link.
According to an aspect of the present utility model, there is provided a vehicle speed signal simulation detector, comprising: a connector, a signal switching button, and a circuit board;
the connector is connected with the circuit board, the circuit board is connected with the signal switching button, the circuit board is used for sending out a vehicle speed analog signal in a preset frequency range, and the signal switching button is used for adjusting the frequency of the vehicle speed analog signal according to a vehicle type;
the connector comprises a first wiring terminal, a second wiring terminal and a third wiring terminal, wherein the first wiring terminal is connected with a signal receiving end of the vehicle speed sensor, the second wiring terminal is connected with a positive power end of the vehicle speed sensor, and the third wiring terminal is connected with a negative grounding end of the vehicle speed sensor;
the circuit board comprises a first switch unit, a voltage division unit, a second switch unit, a pull-up unit and a processing unit;
the control end of the first switch unit is connected with the signal switching button, the first end of the first switch unit is connected with the first end of the processing unit, the second end of the first switch unit is connected with the first end of the voltage dividing unit, the second end of the voltage dividing unit is connected with the second end of the processing unit, the third end of the voltage dividing unit is connected with the first end of the second switch unit, the second end of the second switch unit is connected with the first end of the pull-up unit and the first wiring terminal, the third end of the second switch unit is connected with the third end of the processing unit and the third wiring terminal, and the second end of the pull-up unit is connected with the second wiring terminal.
Optionally, the first switch unit includes a key switch, the voltage division unit includes a second resistor and a third resistor, the second switch unit includes a triode, the pull-up unit includes a first resistor, and the processing unit includes a singlechip, a fifth capacitor, a sixth capacitor and a crystal oscillator;
the control end of the key switch is connected with the signal switching button, the first end of the key switch is connected with the ninth end of the single chip microcomputer, the second end of the key switch is connected with the first end of the third resistor, the eighth end of the single chip microcomputer and the emitting electrode of the triode, the second end of the third resistor is connected with the first end of the second resistor and the base electrode of the triode, the second end of the second resistor is connected with the fourteenth end of the single chip microcomputer, the collecting electrode of the triode is connected with the first end of the first resistor and the first terminal, the second end of the first resistor is connected with the second terminal, the first end of the fifth capacitor is connected with the fourth end of the single chip microcomputer after being connected with the first end of the crystal oscillator, the first end of the sixth capacitor is connected with the fifth end of the single chip microcomputer after being connected with the second end of the crystal oscillator, and the second end of the fifth capacitor is connected with the eighth end of the third terminal.
Optionally, the circuit board further comprises a voltage stabilizing unit, a first filtering unit and a second filtering unit;
the input end of the voltage stabilizing unit is connected with the first end of the first filtering unit and the second wiring end, the grounding end of the voltage stabilizing unit is connected with the second end of the first filtering unit, the second end of the second filtering unit and the third wiring end, and the output end of the voltage stabilizing unit is connected with the first end of the second filtering unit and the power end of the processing unit.
Optionally, the voltage stabilizing unit comprises a voltage stabilizer, the first filtering unit comprises a first capacitor and a second capacitor, and the second filtering unit comprises a third capacitor and a fourth capacitor;
the first end of the first capacitor is connected with the first end of the second capacitor and then is connected with the second wiring terminal and the input end of the voltage stabilizer, the output end of the voltage stabilizer is connected with the first end of the third capacitor, the first end of the fourth capacitor and the power end of the processing unit, and the second end of the third capacitor is connected with the second end of the fourth capacitor and then is connected with the grounding end of the voltage stabilizer and the third wiring terminal.
Optionally, the vehicle speed analog signal is a PWM signal, and the frequency of the vehicle speed analog signal includes 100HZ-300HZ.
Optionally, the vehicle speed signal simulation detector further comprises an upper shell and a lower shell, wherein the circuit board is arranged between the upper shell and the lower shell, and the upper shell is fixedly connected with the lower shell through screws.
Optionally, the connector includes a connection wire and a plug, and the plug is connected with the circuit board through the connection wire.
Optionally, the vehicle speed signal simulation detector further comprises a power indicator and a signal indicator, wherein the power indicator and the signal indicator are fixedly connected to the first surface of the lower shell and are positioned on two sides of the connecting wire, and the signal switching button is fixedly connected to the second surface of the lower shell, and the first surface and the second surface of the lower shell are vertical.
Optionally, the vehicle speed signal simulation detector further comprises a threaded connecting piece, the connecting wire is fixed on the first surface of the lower shell through the threaded connecting piece, and the signal switching button is fixed on the second surface of the lower shell through the threaded connecting piece.
According to another aspect of the present utility model, there is provided a vehicle including the vehicle speed signal simulation detector and the vehicle speed sensor as described in any one of the above aspects.
According to the technical scheme, the vehicle speed signal simulation detector is used for sending the vehicle speed simulation signal in the preset frequency range, the vehicle speed sensor is used for collecting and displaying the vehicle speed, and the vehicle speed sensor is matched with the manual verification of whether the speed limiting function of the vehicle is qualified or not, so that the commercial vehicle can be subjected to speed limiting detection in the vehicle speed limiting detection link, the vehicle can be subjected to speed limiting detection in the condition of not running in situ, the test on the speed measuring roller is not needed, the test time is greatly shortened, and the operation safety is greatly improved. In summary, the embodiment of the utility model solves the problems that the prior art has long time for the speed limit test link of the vehicle and has great potential safety hazard in the test.
It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the utility model or to delineate the scope of the utility model. Other features of the present utility model will become apparent from the description that follows.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a vehicle speed signal simulation detector according to an embodiment of the present utility model;
FIG. 2 is a schematic circuit diagram of a vehicle speed signal simulation detector provided according to an embodiment of the present utility model;
FIG. 3 is a schematic diagram and logic diagram for limiting the speed of a commercial vehicle according to an embodiment of the present utility model;
FIG. 4 is a schematic circuit diagram of yet another vehicle speed signal analog detector provided in accordance with an embodiment of the present utility model;
fig. 5 is a schematic structural diagram of another vehicle speed signal analog detector according to an embodiment of the present utility model.
Detailed Description
In order that those skilled in the art will better understand the present utility model, a technical solution in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present utility model and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the utility model described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Fig. 1 is a schematic structural diagram of a vehicle speed signal simulation detector according to an embodiment of the present utility model, and fig. 2 is a schematic circuit diagram of a vehicle speed signal simulation detector according to an embodiment of the present utility model, and referring to fig. 1 and fig. 2, an embodiment of the present utility model provides a vehicle speed signal simulation detector, including: a connector 1, a signal switching button 2, and a circuit board 3; the connector 1 is connected with the circuit board 3, the circuit board 3 is connected with the signal switching button 2, the circuit board 3 is used for sending out a vehicle speed analog signal in a preset frequency interval, and the signal switching button 2 is used for adjusting the frequency of the vehicle speed analog signal according to the vehicle type; the connector 1 comprises a first wiring terminal 11, a second wiring terminal 12 and a third wiring terminal 13, wherein the first wiring terminal 11 is connected with a signal receiving end A of the vehicle speed sensor, the second wiring terminal 12 is connected with a positive power terminal B of the vehicle speed sensor, and the third wiring terminal 13 is connected with a negative ground terminal C of the vehicle speed sensor; the circuit board 3 includes a first switching unit 31, a voltage dividing unit 32, a second switching unit 33, a pull-up unit 34, and a processing unit 35; the control terminal G of the first switch unit 31 is connected to the signal switching button 2, the first terminal of the first switch unit 31 is connected to the first terminal of the processing unit 35, the second terminal of the first switch unit 31 is connected to the first terminal of the voltage dividing unit 32, the second terminal of the voltage dividing unit 32 is connected to the second terminal of the processing unit 35, the third terminal of the voltage dividing unit 32 is connected to the first terminal of the second switch unit 33, the second terminal of the second switch unit 33 is connected to the first terminal of the pull-up unit 34 and the first terminal 11, the third terminal of the second switch unit 33 is connected to the third terminal of the processing unit 35 and the third terminal 13, and the second terminal of the pull-up unit 34 is connected to the second terminal 12.
Specifically, the vehicle speed signal simulation detector is used for vehicle running signal simulation, and more specifically is applied to commercial vehicle running vehicle speed signal simulation, so that the detection of a vehicle speed limit function is realized.
Fig. 3 is a schematic diagram of a logic and a logic diagram for limiting a vehicle speed of a commercial vehicle according to an embodiment of the present utility model, and referring to fig. 3, fig. 3 illustrates a logic principle of a source of a vehicle speed signal and a vehicle speed limit. Through researching the source of the vehicle speed signal and the logic principle of vehicle speed limit, it is found that all vehicle types are tested by a frequency method, and the number of the wheel speed signal pulses in a certain time is measured, counted and converted into the vehicle speed. The embodiment mode on the real vehicle is that the conversion of the vehicle speed is carried out by testing the tooth number of a balance wheel on the gearbox through a vehicle speed sensor of a gearbox odometer, the vehicle speed sensor supplies power and ground through an instrument, and a vehicle speed signal is sent to the instrument for display. For example, the vehicle speed signal may be a PWM signal. Therefore, only one hardware device capable of sending out PWM signals is manufactured, the simulation of the vehicle speed can be realized, and in order to adapt to various vehicle types (different speed ratios of the rear axle and different vehicle speeds can be output by signals with the same frequency), the frequency of the PWM signals is variable, the frequency is not required to be known, and the speed can be increased to all vehicle types (the maximum speed ratio 6.733 of the rear axle and the minimum rolling radius of the tire of 494 mm) and the passing signal can be increased to 90 km/h. Considering that the current output by the instrument is smaller and combining the requirement of the whole scheme (the signal received by the instrument is low level below 0.5V and high level above 6V), the circuit board is adopted.
With continued reference to fig. 1 and 2, when the vehicle speed signal simulation detector is in operation, the tester connects the first terminal 11, the second terminal 12 and the third terminal 13 of the connector 1 with three terminals of a vehicle speed sensor on an automobile engine respectively, and the circuit board 3 sends out a series of vehicle speed simulation signals in running of the automobile, for example, the vehicle speed simulation signals can be 95km/h of vehicle speed pulse signals. The vehicle speed pulse signal is finally displayed on an instrument panel through the acquisition of a vehicle speed sensor, so that an electronic control unit of an engine judges that the vehicle is in a speed limit state, and at the moment, if the acceleration of stepping on an accelerator by a tester fails, the speed limit of the vehicle is judged to be qualified; at this time, if the acceleration of the accelerator pedal by the tester does not fail, it is determined that the speed limit of the vehicle is not acceptable. The vehicle speed signal simulation detector can achieve detection equipment for rapidly judging whether the vehicle speed limiting function is normal or not under the condition that the vehicle does not run, and the vehicle speed limiting function is safely and efficiently detected.
The vehicle speed signal simulation detector directly utilizes the vehicle speed sensor to supply power, the wire harness is spliced by utilizing the whole wire harness, and no extra wiring is needed, so that the whole detection process is not limited by the field, and the equipment can be detected after being inserted. By using the circuit board 3 to simulate the output of the vehicle speed pulse signal, the output of the vehicle speed sensor is analyzed without any further rotation or movement of mechanical parts to obtain an input.
The joint connected with the vehicle speed sensor can be changed to be suitable for engines of different models and manufacturers. The vehicle speed analog signal of different frequency intervals can be sent out by adjusting the signal switching button 2, for example, 20HZ is increased every time the key is pressed.
According to the technical scheme, the vehicle speed signal simulation detector is used for sending the vehicle speed simulation signal in the preset frequency range, the vehicle speed sensor is used for collecting and displaying the vehicle speed, and the vehicle speed sensor is matched with the manual verification of whether the speed limiting function of the vehicle is qualified or not, so that the commercial vehicle can be subjected to speed limiting detection in the vehicle speed limiting detection link, the vehicle can be subjected to speed limiting detection in the condition of not running in situ, the test on the speed measuring roller is not needed, the test time is greatly shortened, and the operation safety is greatly improved. In summary, the embodiment of the utility model solves the problems that the prior art has long time for the speed limit test link of the vehicle and has great potential safety hazard in the test.
Fig. 4 is a schematic circuit diagram of another vehicle speed signal analog detector according to an embodiment of the present utility model, optionally, the first switch unit 31 includes a key switch SW-PB, the voltage dividing unit 32 includes a second resistor R2 and a third resistor R3, the second switch unit 33 includes a triode Q1, the pull-up unit 34 includes a first resistor R1, and the processing unit 35 includes a single chip microcomputer U1, a fifth capacitor C5, a sixth capacitor C6 and a crystal oscillator Y1; the control end G of the key switch SW-PB is connected with the signal switching button, the first end of the key switch SW-PB is connected with the ninth end 9 of the single chip microcomputer U1, the second end of the key switch SW-PB is connected with the first end of the third resistor R3, the eighth end 8 of the single chip microcomputer U1 and the emitter e of the triode Q1, the second end of the third resistor R3 is connected with the first end of the second resistor R2 and the base b of the triode Q1, the second end of the second resistor R2 is connected with the tenth end 14 of the single chip microcomputer U1, the collector C of the triode Q1 is connected with the first end of the first resistor R1 and the first terminal 11, the second end of the first resistor R1 is connected with the second terminal 12, the first end of the fifth capacitor C5 is connected with the fourth end 4 of the single chip microcomputer U1 after being connected with the first end of the crystal oscillator Y1, the first end of the sixth capacitor C6 is connected with the second end of the crystal oscillator Y1, and the third end of the fifth capacitor C5 is connected with the eighth end of the single chip microcomputer U1 after being connected with the third end of the fourth end of the sixth capacitor C6 and the eighth end of the crystal oscillator Y1.
Specifically, when the P1.6 interface of the singlechip U1 is at a low level, the triode Q1 is not conducted, and the output vehicle speed analog signal is at a high level through the pull-up of the first resistor R1; when the P1.6 interface of the singlechip U1 is at a high level, the triode Q1 is conducted, and the output vehicle speed analog signal is at a low level.
The triode Q1 can be an NPN triode, and the model of the singlechip U1 can be 11F01-SOP16-DIP16. The resistance of the first resistor R1 may be 5K6, the resistance of the second resistor R2 may be 1K, the resistance of the third resistor R3 may be 5K6, the size of the fifth capacitor C5 may be 22pF, and the size of the sixth capacitor C6 may be 22pF.
With continued reference to fig. 4, the circuit board 3 optionally further includes a voltage stabilizing unit 36, a first filtering unit 37, and a second filtering unit 38; the input terminal Vin of the voltage stabilizing unit 36 is connected to the first end of the first filtering unit 37 and the second terminal 12, the ground terminal GND of the voltage stabilizing unit 36 is connected to the second end of the first filtering unit 37, the second end of the second filtering unit 38 and the third terminal 13, and the output terminal Vout of the voltage stabilizing unit 36 is connected to the first end of the second filtering unit 38 and the power supply terminal VCC of the processing unit 35.
Specifically, the first filter unit 37 and the second filter unit 38 function as rectification and filtering. The voltage stabilizing unit 36 may be a three-terminal voltage stabilizer of 78M05 series.
With continued reference to fig. 4, optionally, the voltage stabilizing unit 36 includes a voltage stabilizer IC1, the first filtering unit 37 includes a first capacitor C1 and a second capacitor C2, and the second filtering unit 38 includes a third capacitor C3 and a fourth capacitor C4; the first end of the first capacitor C1 and the first end of the second capacitor C2 are connected to the second terminal 12 and the input terminal Vin of the voltage regulator IC1, the output terminal of the voltage regulator IC1 is connected to the first end of the third capacitor C3, the first end of the fourth capacitor C4 and the power supply terminal VCC of the processing unit 35, and the second end of the third capacitor C3 is connected to the second end of the fourth capacitor C4 and then to the ground terminal GND and the third terminal 13 of the voltage regulator IC 1.
Specifically, the first capacitor C1 may have a size of 100uF, the second capacitor C2 may have a size of 100nF, the third capacitor C3 may have a size of 100nF, and the fourth capacitor C4 may have a size of 22uF.
Optionally, the vehicle speed analog signal is a PWM signal, and the frequency of the vehicle speed analog signal includes 100HZ-300HZ.
Specifically, the vehicle speed analog signal is a PWM signal sent by the singlechip, namely a rectangular pulse signal. To adapt to different types of vehicles, the frequency of the vehicle speed analog signal is variable, for example, can be 100HZ-300HZ, and the frequency can be increased by 20HZ each time the signal switching button is adjusted.
Fig. 5 is a schematic structural diagram of another vehicle speed signal analog detector according to an embodiment of the present utility model, referring to fig. 5, optionally, the vehicle speed signal analog detector further includes an upper housing 4 and a lower housing 5, the circuit board 3 is disposed between the upper housing 4 and the lower housing 5, and the upper housing 4 and the lower housing 5 are fixedly connected through screws 9.
With continued reference to fig. 5, the connector 1 optionally includes a connection wire 101 and a plug 102, the plug 102 being connected to the circuit board 3 by the connection wire 101.
With continued reference to fig. 5, optionally, the vehicle speed signal analog detector further includes a power indicator lamp 6 and a signal indicator lamp 7, where the power indicator lamp 6 and the signal indicator lamp 7 are fixedly connected to the first surface X of the lower housing 5 and located on two sides of the connecting line 101, and the signal switching button 2 is fixedly connected to the second surface Y of the lower housing 5, where the first surface X and the second surface Y of the lower housing 5 are perpendicular to each other.
With continued reference to fig. 5, the vehicle speed signal simulation detector optionally further includes a threaded connector 8, the connection line 101 is fixed to the first face X of the lower housing 5 by the threaded connector 8, and the signal switching button 2 is fixed to the second face of the lower housing 5 by the threaded connector 8.
Specifically, the circuit board 3 is placed between the upper casing 4 and the lower casing 5, and is fixed by fixing glue. The power indicator lamp 6 and the signal indicator lamp 7 are glued to the lower housing 5 and located on both sides of the fixation point of the connecting wire 101. The vehicle speed signal simulation detector also comprises other various connecting pieces and standard pieces.
The embodiment of the utility model also provides a vehicle which comprises the vehicle speed signal simulation detector and the vehicle speed sensor provided by any embodiment of the utility model.
Because the vehicle comprises the vehicle speed signal simulation detector provided by any embodiment of the utility model, the vehicle has the same beneficial effects as the vehicle speed signal simulation detector, and the description is omitted here.
The above embodiments do not limit the scope of the present utility model. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included in the scope of the present utility model.
Claims (10)
1. A vehicle speed signal analog detector, comprising: a connector, a signal switching button, and a circuit board;
the connector is connected with the circuit board, the circuit board is connected with the signal switching button, the circuit board is used for sending out a vehicle speed analog signal in a preset frequency range, and the signal switching button is used for adjusting the frequency of the vehicle speed analog signal according to a vehicle type;
the connector comprises a first wiring terminal, a second wiring terminal and a third wiring terminal, wherein the first wiring terminal is connected with a signal receiving end of the vehicle speed sensor, the second wiring terminal is connected with a positive power end of the vehicle speed sensor, and the third wiring terminal is connected with a negative grounding end of the vehicle speed sensor;
the circuit board comprises a first switch unit, a voltage division unit, a second switch unit, a pull-up unit and a processing unit;
the control end of the first switch unit is connected with the signal switching button, the first end of the first switch unit is connected with the first end of the processing unit, the second end of the first switch unit is connected with the first end of the voltage dividing unit, the second end of the voltage dividing unit is connected with the second end of the processing unit, the third end of the voltage dividing unit is connected with the first end of the second switch unit, the second end of the second switch unit is connected with the first end of the pull-up unit and the first wiring terminal, the third end of the second switch unit is connected with the third end of the processing unit and the third wiring terminal, and the second end of the pull-up unit is connected with the second wiring terminal.
2. The detector of claim 1, wherein the first switch unit comprises a key switch, the voltage dividing unit comprises a second resistor and a third resistor, the second switch unit comprises a triode, the pull-up unit comprises a first resistor, and the processing unit comprises a single chip microcomputer, a fifth capacitor, a sixth capacitor and a crystal oscillator;
the control end of the key switch is connected with the signal switching button, the first end of the key switch is connected with the ninth end of the single chip microcomputer, the second end of the key switch is connected with the first end of the third resistor, the eighth end of the single chip microcomputer and the emitting electrode of the triode, the second end of the third resistor is connected with the first end of the second resistor and the base electrode of the triode, the second end of the second resistor is connected with the fourteenth end of the single chip microcomputer, the collecting electrode of the triode is connected with the first end of the first resistor and the first terminal, the second end of the first resistor is connected with the second terminal, the first end of the fifth capacitor is connected with the fourth end of the single chip microcomputer after being connected with the first end of the crystal oscillator, the first end of the sixth capacitor is connected with the fifth end of the single chip microcomputer after being connected with the second end of the crystal oscillator, and the second end of the fifth capacitor is connected with the eighth end of the third terminal.
3. The detector of claim 1, wherein the circuit board further comprises a voltage stabilizing unit, a first filtering unit, and a second filtering unit;
the input end of the voltage stabilizing unit is connected with the first end of the first filtering unit and the second wiring end, the grounding end of the voltage stabilizing unit is connected with the second end of the first filtering unit, the second end of the second filtering unit and the third wiring end, and the output end of the voltage stabilizing unit is connected with the first end of the second filtering unit and the power end of the processing unit.
4. The detector of claim 3, wherein the voltage stabilizing unit comprises a voltage stabilizer, the first filtering unit comprises a first capacitor and a second capacitor, and the second filtering unit comprises a third capacitor and a fourth capacitor;
the first end of the first capacitor is connected with the first end of the second capacitor and then is connected with the second wiring terminal and the input end of the voltage stabilizer, the output end of the voltage stabilizer is connected with the first end of the third capacitor, the first end of the fourth capacitor and the power end of the processing unit, and the second end of the third capacitor is connected with the second end of the fourth capacitor and then is connected with the grounding end of the voltage stabilizer and the third wiring terminal.
5. The detector of claim 1, wherein the vehicle speed analog signal is a PWM signal, and the frequency of the vehicle speed analog signal comprises 100HZ to 300HZ.
6. The detector of claim 1, further comprising an upper housing and a lower housing, wherein the circuit board is disposed between the upper housing and the lower housing, and wherein the upper housing and the lower housing are fixedly connected by screws.
7. The meter of claim 6, wherein the connector comprises a connection wire and a plug, the plug being connected to the circuit board by the connection wire.
8. The meter of claim 7, further comprising a power indicator and a signal indicator fixedly connected to the first face of the lower housing and on either side of the connecting line, the signal switch button being fixedly connected to the second face of the lower housing, wherein the first face and the second face of the lower housing are perpendicular.
9. The meter of claim 7, further comprising a threaded connection, wherein the connection wire is secured to the first face of the lower housing by the threaded connection, and wherein the signal switch button is secured to the second face of the lower housing by the threaded connection.
10. A vehicle comprising the vehicle speed signal simulation detector according to any one of claims 1 to 9 and a vehicle speed sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320549956.1U CN219369145U (en) | 2023-03-20 | 2023-03-20 | Vehicle speed signal simulation detector and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320549956.1U CN219369145U (en) | 2023-03-20 | 2023-03-20 | Vehicle speed signal simulation detector and vehicle |
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| Publication Number | Publication Date |
|---|---|
| CN219369145U true CN219369145U (en) | 2023-07-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320549956.1U Active CN219369145U (en) | 2023-03-20 | 2023-03-20 | Vehicle speed signal simulation detector and vehicle |
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| Country | Link |
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| CN (1) | CN219369145U (en) |
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2023
- 2023-03-20 CN CN202320549956.1U patent/CN219369145U/en active Active
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