CN211731355U - Vacuum pressure detection and controller for new energy automobile - Google Patents
Vacuum pressure detection and controller for new energy automobile Download PDFInfo
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- CN211731355U CN211731355U CN202020345884.5U CN202020345884U CN211731355U CN 211731355 U CN211731355 U CN 211731355U CN 202020345884 U CN202020345884 U CN 202020345884U CN 211731355 U CN211731355 U CN 211731355U
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Abstract
The utility model relates to the technical field of new energy vehicles, and discloses a vacuum pressure detection and controller for a new energy vehicle, which comprises a vacuum pressure detection module, a signal preprocessing module, a MCU module, a driving module, a temperature detection module and a vacuum pump working state detection module; the gas storage tank is connected with the vacuum pressure detection module through a gas circuit, and the vacuum pressure detection module inputs a pressure signal to the MCU module through the signal preprocessing module; the temperature detection module detects a temperature signal input to the MCU module; the MCU module is connected with the driving module, and the vacuum pump is connected with a driving power supply through the driving module; and the vacuum pump working state detection module inputs the running electrical parameters of the vacuum pump to the MCU module. The MCU module controls the vacuum pump to start or stop working according to the received pressure signal, the temperature signal and the operation electrical parameter, and finally enables a gas storage tank connected with the vacuum pump through a gas circuit to keep a certain pressure range, so that good vacuum brake assistance is realized.
Description
Technical Field
The utility model relates to a new energy automobile technical field, concretely relates to a vacuum pressure detection and controller for new energy automobile.
Background
The vacuum pressure detection and control of the vacuum brake power assisting for the existing new energy electric automobile is composed of two independent components, and is high in cost, complex in installation and large in occupied space. And the pressure detection mostly adopts mechanical pressure switch, only can detect a pressure point, as the start pressure point of vacuum pump, and the stop pressure of vacuum pump is unset, relies on the timing time work of controller, has increased the operating time and the work load of vacuum pump, and energy utilization efficiency is low, influences the life-span of vacuum pump, has reduced the security of car.
SUMMERY OF THE UTILITY MODEL
In view of the not enough of background art, the utility model provides a vacuum pressure detects and controller for new energy automobile, and the technical problem that solve is that the vacuum pressure of new energy automobile's vacuum brake helping hand detects and control separately goes on, and the pressure detection scope is narrow, can only detect the fixed pressure point, and the operating time of vacuum pump passes through timing control moreover, and energy utilization efficiency is low.
For solving the technical problem, the utility model provides a following technical scheme: a vacuum pressure detection and controller for a new energy automobile comprises a vacuum pressure detection module, a signal preprocessing module, an MCU module, a driving module, a temperature detection module and a vacuum pump working state detection module;
the air storage tank is connected with the vacuum pressure detection module through an air path, the vacuum pressure detection module inputs a group of detected differential signals to the signal preprocessing module, the signal preprocessing module carries out noise filtering and amplification on the differential signals to generate analog quantity signals, and the analog quantity signals are input to an analog-to-digital conversion interface of the MCU module;
the temperature detection module is configured to detect the temperature of the vacuum pressure detection module, and an output signal of the temperature detection module is connected with an analog-to-digital conversion interface of the MCU module;
the MCU module is connected with the driving module and inputs driving signals to the driving module, and the vacuum pump is connected with a driving power supply through the driving module; the vacuum pump working state detection module is connected with the driving module and configured to detect the working current of the vacuum pump, and an output signal of the vacuum pump working state detection module is connected with the analog-to-digital conversion interface of the MCU module.
Further, the driving module performs voltage amplification and current amplification on the received driving signal, and drives the power MOS tube with the amplified driving signal.
Further, the vacuum pressure detection module adopts a silicon pressure sensor.
Compared with the prior art, the utility model beneficial effect who has is:
1. the vacuum pressure detection and control are realized by one integrated component, the installation is simple, and the occupied space is small. 2. The pressure sensing detection adopts a silicon sensor, and the vacuum pressure of the gas storage tank can be continuously detected. 3. The pressure that can accurate control vacuum pump start and stop raises the efficiency, better assurance brake helping hand effect, and then improves the life-span of vacuum pump, improves the security of car.
Drawings
The utility model discloses there is following figure:
FIG. 1 is a schematic view of the present invention;
fig. 2 is a circuit diagram of the temperature detection module of the present invention;
fig. 3 is a circuit diagram of the MCU module of the present invention;
fig. 4 is a circuit diagram of the driving module of the present invention;
fig. 5 is a circuit diagram of the signal preprocessing module of the present invention.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.
As shown in fig. 1, a vacuum pressure detection and controller for a new energy automobile comprises a vacuum pressure detection module 1, a signal preprocessing module 2, an MCU module 3, a driving module 5, a temperature detection module 4, and a vacuum pump working state detection module 7;
the gas storage tank 8 is connected with the vacuum pressure detection module 1 through a gas circuit, the vacuum pressure detection module 1 inputs a group of detected differential signals to the signal preprocessing module 2, the signal preprocessing module 2 carries out noise filtering and amplification on the differential signals and generates analog quantity signals, and the analog quantity signals are input to an analog-to-digital conversion interface of the MCU module 3.
Wherein, the vacuum pressure detection module 1 selects a pressure sensor with the model number of SMI 5420.
As shown in fig. 3, the MCU module 3 employs an STM8S003 single chip microcomputer.
As shown in fig. 2, the temperature detection module samples the thermistor NTC to detect the surface temperature of the pressure sensor, when the temperature of the pressure sensor changes, the resistance of the thermistor NTC changes correspondingly, and then the TempTest electrical signal input to the single chip microcomputer by the thermistor NTC changes, so as to realize temperature detection. Wherein, thermistor NTC connects the digital-to-analog conversion interface of singlechip.
As shown in fig. 4, the single chip outputs a control signal ST, which is amplified by transistors Q1 and Q2 to drive a MOS transistor M1. When the MOS transistor M1 is switched on, the vacuum pump is switched on to work, and when the MOS transistor M1 is switched off, the vacuum pump is switched off and the work is stopped.
The source electrode of the MOS tube M1 is grounded through a resistor RS, the voltage of the resistor RS is connected with a digital-to-analog conversion structure of the single chip microcomputer, and the working current of the vacuum pump can be obtained by measuring the voltage at the two ends of the resistor RS due to the fact that the resistance value of the resistor RS is determined.
As shown in fig. 5, the signal preprocessing module 2 includes a first operational amplifier OP1 and a second operational amplifier OP2, which amplify the positive and negative signals output by the pressure sensor, and the amplified signals are denoised and filtered by capacitors C4 and C5 and then input to the digital-to-analog conversion interface of the single chip microcomputer.
The utility model discloses the theory of operation as follows: the pressure sensor detects the vacuum pressure (namely the vacuum degree) of the gas storage tank, then a group of differential signals are generated, the differential signals are input into the signal preprocessing module 2, the signal preprocessing module 2 carries out noise filtering and amplification on the differential signals to generate analog quantity signals, and the analog quantity signals are connected to an analog-to-digital conversion interface of the MCU module; the temperature detection module 4 detects the temperature of the vacuum pressure detection module 1, particularly the temperature of the silicon sensor, and the output temperature signal is connected to one analog-to-digital conversion interface of the MCU module 3; the vacuum pump working state detection module 7 detects electric parameters such as working current of the driving module 5 and the like which represent the working state of the vacuum pump 6, and the output of the electric parameters is connected to one path of analog-to-digital conversion interface of the MCU module 3.
The MCU module 3 performs analog-to-digital conversion on the received amplified analog quantity signal, the temperature signal and the electric parameter signal of the working state of the vacuum pump, converts the analog quantity signal, the temperature signal and the electric parameter signal into digital signals, processes the three digital signals, and finally outputs a driving signal to the driving module 5 to control the vacuum pump to start or stop working.
The driving module 5 amplifies voltage and current of the received driving signal, drives the output power MOS tube, realizes control of a vacuum pump connected to the output of the MOS tube, and finally enables a gas storage tank connected with the vacuum pump through a gas circuit to keep a certain pressure (vacuum degree) range, so that good vacuum brake assistance is realized.
In light of the above, the present invention is not limited to the above embodiments, and various changes and modifications can be made by the worker without departing from the scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (3)
1. The utility model provides a vacuum pressure detects and controller for new energy automobile which characterized in that: the device comprises a vacuum pressure detection module, a signal preprocessing module, an MCU module, a driving module, a temperature detection module and a vacuum pump working state detection module; the air storage tank is connected with the vacuum pressure detection module through an air path, the vacuum pressure detection module inputs a group of detected differential signals to the signal preprocessing module, the signal preprocessing module carries out noise filtering and amplification on the differential signals to generate analog quantity signals, and the analog quantity signals are input to an analog-to-digital conversion interface of the MCU module; the temperature detection module is configured to detect the temperature of the vacuum pressure detection module, and an output signal of the temperature detection module is connected with an analog-to-digital conversion interface of the MCU module; the MCU module is connected with the driving module and inputs driving signals to the driving module, and the vacuum pump is connected with a driving power supply through the driving module; the vacuum pump working state detection module is connected with the driving module and configured to detect the working current of the vacuum pump, and an output signal of the vacuum pump working state detection module is connected with an analog-to-digital conversion interface of the MCU module.
2. The vacuum pressure detection and controller for the new energy automobile according to claim 1, characterized in that: the driving module is used for carrying out voltage amplification and current amplification on the received driving signal and driving the power MOS tube by the amplified driving signal.
3. The vacuum pressure detection and controller for the new energy automobile according to claim 1, characterized in that: the vacuum pressure detection module adopts a silicon pressure sensor.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020345884.5U CN211731355U (en) | 2020-03-18 | 2020-03-18 | Vacuum pressure detection and controller for new energy automobile |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020345884.5U CN211731355U (en) | 2020-03-18 | 2020-03-18 | Vacuum pressure detection and controller for new energy automobile |
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| CN211731355U true CN211731355U (en) | 2020-10-23 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113246946A (en) * | 2021-05-30 | 2021-08-13 | 重庆长安汽车股份有限公司 | Electronic vacuum pump system fault processing method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113246946A (en) * | 2021-05-30 | 2021-08-13 | 重庆长安汽车股份有限公司 | Electronic vacuum pump system fault processing method |
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