CN212674835U - Urea solution detection assembly and automobile - Google Patents
Urea solution detection assembly and automobile Download PDFInfo
- Publication number
- CN212674835U CN212674835U CN202021548755.2U CN202021548755U CN212674835U CN 212674835 U CN212674835 U CN 212674835U CN 202021548755 U CN202021548755 U CN 202021548755U CN 212674835 U CN212674835 U CN 212674835U
- Authority
- CN
- China
- Prior art keywords
- interface
- controller
- module
- urea solution
- sampling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The utility model discloses a urea solution determine module and car, urea solution determine module includes the ultrasonic wave unit, the pencil, a controller, pulse signal module and sampling module, the pencil includes control interface, the sensor interface, pulse signal interface and sampling interface, the pencil passes through control interface, the sensor interface respectively with the controller, the ultrasonic wave unit is connected, pulse signal module's input is connected with the controller, pulse signal module's output is connected with the pulse signal interface, sampling module's input is connected with the sampling interface, sampling module's output is connected with the controller.
Description
Technical Field
The embodiment of the utility model provides a relate to the sensor technology, especially relate to a urea solution determine module and car.
Background
In recent years, the requirements of China on the exhaust emission of motor vehicles are increasingly strict, and the pollution treatment of the motor vehicle exhaust is particularly important. At present, the emission of nitrogen oxides and PM in automobile exhaust is reduced by adding urea. The change of the concentration and the temperature of the urea solution can affect the reaction efficiency of the urea solution and the tail gas, so that the detection of the urea solution for the vehicle is very important.
The key device in the vehicle urea solution detection device is an ultrasonic transducer which is positioned at the bottom of a urea solution container and is connected with a control board through a wiring harness. The existing urea solution detection product can only judge the fault of the transducer by not detecting the concentration value of the urea solution, but can not accurately obtain the fault type.
SUMMERY OF THE UTILITY MODEL
The utility model provides a urea solution determine module and car to the realization can carry out quality testing to urea solution, simultaneously, when determine module breaks down, can judge the type of trouble.
In a first aspect, an embodiment of the present invention provides a urea solution detection assembly, which includes an ultrasonic unit, a wire harness, a controller, a pulse signal module, and a sampling module,
the wire harness comprises a control interface, a sensor interface, a pulse signal interface and a sampling interface, the wire harness is respectively connected with the controller and the ultrasonic unit through the control interface and the sensor interface,
the input end of the pulse signal module is connected with the controller, the output end of the pulse signal module is connected with the pulse signal interface,
the input end of the sampling module is connected with the sampling interface, and the output end of the sampling module is connected with the controller.
Further, the wire harness includes a power line and a signal line,
the two ends of the power line and the signal line are respectively connected with the control interface and the sensor interface, and the pulse signal interface and the sampling interface are arranged on the signal line.
Further, the sampling module comprises a first resistor and a second resistor,
the first end of the first resistor is connected with the input end of the sampling module, the second end of the first resistor is connected with the reference level end through the second resistor, and the second end of the first resistor is also connected with the output end of the sampling module.
Further, the sampling module further comprises a diode of a third resistor,
the second end of the first resistor is connected with the output end of the sampling module through the third resistor, the anode of the diode is connected with the output end of the sampling module, and the cathode of the diode is connected with the reference level end.
Further, the device also comprises a temperature sensor, and the temperature sensor is connected with the controller.
Further, the controller also comprises a time converter, and the time converter is connected with the controller.
Further, the intelligent control system also comprises a communication module, and the communication module is connected with the controller.
In a second aspect, the embodiment of the utility model provides a still provide a car, include the embodiment of the utility model provides a urea solution determine module records.
Compared with the prior art, the beneficial effects of the utility model reside in that: the detection assembly is provided with a pulse signal module and a sampling module, and a wire harness of the detection assembly is provided with a pulse signal interface which is connected with the pulse signal module. The pulse signal module can generate a square wave signal according to the trigger signal, the square wave signal can be fed back to the controller through the pulse signal interface, the wiring harness and the sampling module in sequence, when the wiring harness breaks down, the number of pulses collected by the sampling module or the waveform of collected square waves has certain difference under the normal condition, and therefore the controller can judge the fault type of the wiring harness based on the set rule.
Drawings
FIG. 1 is a block diagram of a detection component in an embodiment;
FIG. 2 is a block diagram of another detection assembly in an embodiment;
FIG. 3 is a block diagram of a detection component according to yet another embodiment;
FIG. 4 is a block diagram of a detection component according to yet another embodiment;
FIG. 5 is a schematic diagram of a sampling waveform at the time of an open fault in the embodiment;
fig. 6 is a schematic diagram of a sampling waveform at the time of short-circuit failure in the embodiment.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Example one
Fig. 1 is a block diagram of a detection assembly in an embodiment, and referring to fig. 1, the urea solution detection assembly includes an ultrasonic unit 1, a wire harness 2, a controller 3, a pulse signal module 4, and a sampling module 5.
The wire harness 2 comprises a control interface 21, a sensor interface 22, a pulse signal interface 23 and a sampling interface 24, and the wire harness 2 is respectively connected with the controller 3 and the ultrasonic unit 1 through the control interface 21 and the sensor interface 22. The input end of the pulse signal module 4 is connected with the controller 3, and the output end of the pulse signal module 4 is connected with the pulse signal interface 23. The input end of the sampling module 5 is connected with the sampling interface 24, and the output end of the sampling module 5 is connected with the controller 3.
In the present embodiment, the ultrasonic unit 1 includes a transducer having a function of transmitting and receiving ultrasonic waves, the ultrasonic unit 1 is immersed in the urea solution, the ultrasonic unit 1 and the controller 3 are connected by the wire harness 2, and the controller 3 is configured to determine the concentration of the urea solution according to the time difference between the transmission of the ultrasonic waves and the reception of the ultrasonic waves.
In this embodiment, the wire harness 2 is configured with a pulse signal interface 23, and the pulse signal interface 23 is connected to the pulse signal module 4. The pulse signal module 4 is mainly configured to receive a trigger signal sent by the controller 3, generate a square wave signal, and transmit the square wave signal to the wire harness 2 through the pulse signal interface 23, for example, the pulse signal module 4 may employ a square wave generator or an ultrasonic sensing analog front end. Correspondingly, the wiring harness 2 is further provided with a sampling interface 23, the sampling interface 23 is connected with a sampling module 5, the sampling module 5 is mainly used for receiving the square wave signal transmitted by the wiring harness 2 and feeding back the sampling data to the controller 3, illustratively, the sampling module 5 can adopt a pulse counter or a voltage dividing circuit, if the pulse counter is adopted, the sampling data fed back to the controller 3 is the number of pulses in the square wave, if the voltage dividing circuit is adopted, the sampling data fed back to the controller 3 is the square wave signal passing through the voltage dividing circuit, when the wiring harness 2 has a fault, the number of pulses collected by the sampling module 5 or the waveform of the collected square wave has a certain difference compared with the normal condition, and the controller 3 can judge the fault type of the wiring harness 2 based on a set judgment rule.
Fig. 2 is a block diagram of another detection assembly structure in the embodiment, and referring to fig. 2, specifically, the wiring harness 2 includes a power line and a signal line, two ends of the power line and the signal line are respectively connected to the control interface 21 and the sensor interface 22, and the pulse signal interface 23 and the sampling interface 24 are configured on the signal line.
The sampling module 5 comprises a first resistor R1 and a second resistor R2, a first end of the first resistor R1 is connected with an input end of the sampling module 5, a second end of the first resistor R1 is connected with a reference level end through the second resistor R2, and a second end of the first resistor R1 is further connected with an output end of the sampling module 5.
Illustratively, when an ultrasonic wave is emitted by the ultrasonic transducer, the power line and the signal line in the wiring harness 2 are used for applying a voltage to the piezoelectric crystal, specifically, the power line in the wiring harness 2 applies a fixed voltage to one end of the piezoelectric crystal, and the signal line applies a control piezoelectric, such as a pulse signal, to the other end of the piezoelectric crystal. When the two ends of the piezoelectric crystal alternately generate pressure difference, the piezoelectric crystal generates vibration, and then ultrasonic waves are generated.
Correspondingly, when ultrasonic waves reach the surface of the piezoelectric crystal, the piezoelectric crystal can deform, and voltage changes at two ends of the crystal are caused. The controller 3 can receive the voltage signal through a signal line to judge the arrival time of the ultrasonic signal, and further calculate the concentration of the urea solution through the time difference of the ultrasonic signal.
In this embodiment, whether a signal line fails is determined by the pulse signal module 4 and the sampling module 5, wherein the pulse signal module 4 simulates the front-end TDC1000 by ultrasonic sensing, and the sampling module 5 employs a voltage dividing circuit. In the using process, the signal line may have an open circuit fault or a short circuit with the power line, when the fault occurs, the controller 3 cannot normally communicate with the ultrasonic unit 1, and at this time, the controller 3 controls the pulse signal module 4 to generate a square wave so as to determine the fault type of the signal line.
Fig. 5 is a schematic diagram of a sampling waveform in an open-circuit fault in the embodiment, when an open-circuit fault occurs in a signal line and a square wave is at a high level, the sampling module 5 outputs a high level, and when a square wave is at a low level, the sampling module 5 outputs 0, referring to fig. 5, when the controller 3 collects a low level of a square wave and a voltage value of the low level is less than a trigger threshold, the controller 3 counts and adds 1, and when a count value in unit time is greater than a certain set value (for example, 70), the controller 3 makes a judgment of open circuit of a wire harness.
Fig. 6 is a schematic diagram of a sampling waveform in the case of short-circuit fault in the embodiment, where when a signal line and a power line are short-circuited and a square wave is at a high level, the sampling module 5 outputs a high level, and when the square wave is at a low level, the sampling module 5 outputs a low level, referring to fig. 6, when the controller 3 collects the low level of the square wave and the voltage value of the low level is less than a trigger threshold, the controller 3 counts and adds 1, and when the count value in unit time is less than a certain set value (for example, 30), the controller 3 makes a judgment on the short circuit of the wire harness. For example, due to a short circuit between the signal line and the power line, when the square wave is at a low level, the voltage value of the low level output by the sampling module 5 is close to the voltage value of the high level output and is greater than the trigger threshold value, in general, when the square wave is at a short circuit, the count value of the controller 3 is 0, and in order to avoid a situation of detection error, the set value for short circuit determination is set to be greater than zero and smaller than the set value for open circuit determination.
Fig. 3 is a structural block diagram of another detection assembly in the embodiment, as a preferable scheme, the sampling module 5 further includes a diode D1 of a third resistor R3, a second end of the first resistor R1 is connected to the output end of the sampling module 5 through the third resistor R3, an anode of the diode D1 is connected to the output end of the sampling module 5, and a cathode of the diode D1 is connected to the reference level end.
In fig. 3, a third resistor R3 and a diode D1 are used to limit the current and voltage of the current and voltage entering the pin of the controller 3.
Fig. 4 is a block diagram of a structure of another detecting component in the embodiment, referring to fig. 4, as an implementation scheme, the detecting component further includes a temperature sensor 6, and the temperature sensor 6 is connected with the controller 3. The temperature sensor 6 is used to measure the temperature of the urea solution.
The detection assembly further comprises a time converter 7, the time converter 7 being connected to the controller 3. The time converter 7 is used for timing so that the controller 3 acquires the time interval between the ultrasonic pulse emitted by the ultrasonic unit 1 and the time when the pulse is received. By arranging the time converter 7, the timing precision can be improved, so that the detection precision of the solubility of the urea solution can be improved. Illustratively, the time converter 7 is of the type TDC 7200.
The detection assembly further comprises a communication module 8, the communication module 8 being connected to the controller 3. Illustratively, the communication module 8 is a CAN module, and the controller 3 is connected with a vehicle controller (e.g., an ECU) through the communication module 8 and sends urea solution detection information to the vehicle controller.
Example two
The embodiment provides an automobile, which includes the urea solution detection component described in the first embodiment, and the composition, the working mode and the beneficial effects of the urea solution detection component are the same as those described in the first embodiment, and are not described herein again.
It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.
Claims (8)
1. A urea solution detection assembly is characterized by comprising an ultrasonic unit, a wire harness, a controller, a pulse signal module and a sampling module,
the wire harness comprises a control interface, a sensor interface, a pulse signal interface and a sampling interface, the wire harness is respectively connected with the controller and the ultrasonic unit through the control interface and the sensor interface,
the input end of the pulse signal module is connected with the controller, the output end of the pulse signal module is connected with the pulse signal interface,
the input end of the sampling module is connected with the sampling interface, and the output end of the sampling module is connected with the controller.
2. The urea solution detection assembly of claim 1, wherein the wiring harness includes a power line and a signal line,
the two ends of the power line and the signal line are respectively connected with the control interface and the sensor interface, and the pulse signal interface and the sampling interface are arranged on the signal line.
3. The urea solution detection assembly of claim 1, wherein the sampling module includes a first resistor and a second resistor,
the first end of the first resistor is connected with the input end of the sampling module, the second end of the first resistor is connected with the reference level end through the second resistor, and the second end of the first resistor is also connected with the output end of the sampling module.
4. The urea solution detection assembly of claim 3, wherein the sampling module further comprises a diode of a third resistor,
the second end of the first resistor is connected with the output end of the sampling module through the third resistor, the anode of the diode is connected with the output end of the sampling module, and the cathode of the diode is connected with the reference level end.
5. The urea solution detection assembly of claim 1, further comprising a temperature sensor coupled to the controller.
6. The urea solution detection assembly of claim 1, further comprising a time converter coupled to the controller.
7. The urea solution detection assembly of claim 1, further comprising a communication module coupled to the controller.
8. An automobile comprising a urea solution detection assembly according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021548755.2U CN212674835U (en) | 2020-07-30 | 2020-07-30 | Urea solution detection assembly and automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021548755.2U CN212674835U (en) | 2020-07-30 | 2020-07-30 | Urea solution detection assembly and automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212674835U true CN212674835U (en) | 2021-03-09 |
Family
ID=74817672
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021548755.2U Active CN212674835U (en) | 2020-07-30 | 2020-07-30 | Urea solution detection assembly and automobile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212674835U (en) |
-
2020
- 2020-07-30 CN CN202021548755.2U patent/CN212674835U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105021922B (en) | Auto-Test System and automatic test approach | |
| JP2003270276A (en) | Current measuring system for electric vehicle battery system | |
| JP5331656B2 (en) | Power supply | |
| CN108803585A (en) | A kind of test method and system of T-BOX controllers | |
| CN103530969B (en) | fire alarm controller loop unit and control method thereof | |
| CN103605133A (en) | Vehicle-mounted laser distance measuring device | |
| CN212674835U (en) | Urea solution detection assembly and automobile | |
| CN102854372A (en) | High-voltage bus current detection device and battery management system | |
| CN205190105U (en) | Detection apparatus for car ACC signal | |
| CN102322324B (en) | Vehicle-mounted monitoring system and method for three-way catalytic converter for vehicle | |
| Piao et al. | VRLA battery management system based on LIN bus for electric vehicle | |
| US11733310B2 (en) | Insulation resistance detection device and forklift truck | |
| CN114666244B (en) | Vehicle-mounted gateway test system | |
| CN102175976B (en) | Electricity-taking method and device for detecting battery internal resistance | |
| CN210269993U (en) | Electric vehicle insulation resistance monitor based on small signal injection method | |
| CN212965857U (en) | CAN bus turn-off fault detection device | |
| CN202170825U (en) | On-vehicle monitoring system of vehicular three-way catalytic converter | |
| CN113189509A (en) | Power lithium battery internal resistance characteristic detection system | |
| CN111694346A (en) | OBD universal protocol converter | |
| Soufian et al. | Real-time emission monitoring and display to reduce vehicle pollution using wireless network | |
| CN106379323A (en) | Vehicle control system | |
| CN220015313U (en) | Concentration liquid level detection device, system and tail gas aftertreatment system | |
| Schmutzler et al. | On demand dependent deactivation of automotive ECUs | |
| CN205679722U (en) | Cable fault examination equipment | |
| CN212009551U (en) | Isolation conversion type serial port debugging circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |