CN205561865U - Car gear state detector and have car of this detector - Google Patents

Abstract

The utility model discloses a car gear state detector and have car of this detector. This detector includes MCU host computer, gear signal test input unit, gear display element. Gear signal test input unit includes linear hall response IC array and magnet. Magnet is fixed on the gear action bars of car. The magnetic field intensity that magnet was tracked to linearity hall response IC array changes, and the output lug connection of linear hall response IC array arrives on the first portion IO interface of this MCU host computer. This this gear of MCU host computer drive display element shows current car gear state. The utility model discloses an advantage do: keeping apart with vehicle control system, need not reading former car system parameter, simple to operate need not carry out the dismouting to the vehicle, the wearing and tearing of contactless nothing, and a grade algorithm is prevented scurrying by unique software, and the integrated level is high, low cost. The utility model discloses the car that still openly has this detector.

Description

A kind of automobile gears state detector and there is the automobile of this detector

Technical field

This utility model relates to signal detection and a kind of detector of the communications field and has the automobile of this detector, Particularly relate to a kind of automobile gears state detector and there is the automobile of this detector.

Background technology

Along with driving the development of test system equipment, intelligence is driven to examine and is driven, compared to what invigilator's formula was driven in traditional accompanying, the mode of examining, Embody the biggest progressive.Decrease the judge of anthropic factor the most to greatest extent, really realize Examination is just, fair, open, achieves remotely monitoring and intelligent appraisement examinee's achievement especially, improves Examination efficiency.But drive at present and examine in electronic equipment, due to cab signal detection wrong, especially gear The detection of signal wrong, ultimately results in easily erroneous judgement drain cap and the problem such as does not even sentence, not only have impact on student and examine Examination mood and the level of performance, also cause the biggest impact to judge, allows examination efficiency have a greatly reduced quality, and mesh On front market, gear detection is the most all multiple-channel output, causes interface burden weight, and volume is big, occupies sky Between big.Study carefully its above reason, a kind of automobile gears detector reliably of design, realize gear signal exactly Receive and stable holding is a kind of preferably solution with external device communication.

Utility model content

The purpose of this utility model is to overcome the deficiencies in the prior art, it is provided that a kind of automobile gears state inspection Survey instrument and there is the automobile of this detector, to solve to ask because gear signal detection is unstable and output interface is many etc. Topic.

Solution of the present utility model is: a kind of automobile gears state detector, it includes MCU main frame And the gear signal being all electrically connected with this MCU main frame detects input block and gear display unit；Its In, this gear signal detection input block includes linear Hall sensing IC array and Magnet；This Magnet is fixed on On the gear position operation bar of automobile；Multiple linear Halls sensing IC in this linear Hall sensing IC array represents Different automobile gears, and for following the trail of the change of magnetic field strength of this Magnet, this linear Hall sensing IC array Outfan be directly connected on the Part I I/O interface of this MCU main frame；This gear display unit with This MCU main frame is electrically connected with, and this gear display unit of this MCU host driven shows current automobile gears shape State.

As the further improvement of such scheme, this gear display unit includes eight segment numeral pipes and outer Enclosing circuit, the COM end of this charactron is connected to the Part II of this MCU main frame through a digital switch I/O interface on, eight sections of this charactron display inputs are directly connected to through eight current-limiting resistances On the I/O interface of the Part III of this MCU main frame.

Further, this digital switch is audion, and COM end connects the colelctor electrode of this audion, this three pole On the I/O interface of the Part II that the base stage of pipe is connected to this MCU main frame via resistance R2, this audion Emitter stage connect+5V power Vcc.

As the further improvement of such scheme, this automobile gears state detector also includes communication module circuitry, This communication module circuitry and this MCU main frame are electrically connected with, this MCU main frame by this communication module circuitry with External communication.

Further, this communication module circuitry includes the master/slave protocol controller of local internet LIN and LIN The mark transceiver of the interface between physical bus and peripheral circuit thereof；This MCU main frame sends data and flows through Cross this mark transceiver and be converted into bus signals, and by LIN bus and external equipment 5 communication；This mark Transceiver is sent to this MCU main frame at LIN bus input pin detection data stream.

Yet further, the standard transceiver chip that this mark transceiver uses model to be TJA1021.

Preferably, the pin TXD of this mark transceiver connects the pin TXD1 of this MCU main frame, this mark The pin RXD of note transceiver connects the pin TXD1 of this MCU main frame.

More preferably, the peripheral circuit of this mark transceiver include resistance R11, resistance R12, resistance R13, Resistance R14, electric capacity C7, electric capacity C8；This mark transceiver also have pin NSLP, pin NWAKE, Pin BAT, pin LIN, pin GND；Pin TXD, pin RXD, pin NSLP also distinguish It is electrically connected with+5V power Vcc via resistance R11, resistance R12, resistance R14；Pin NWAKE warp + 12V power Vcc is connected by resistance R13；Pin BAT connects+12V power Vcc, pin GND warp + 12V power Vcc is connected by electric capacity C7；Pin LIN mono-aspect is via electric capacity C8 ground connection, on the other hand Connect the pin TXD1 of this MCU main frame.

As the further improvement of such scheme, this MCU main frame is the host module of band display function.

This utility model also provides for a kind of automobile, and it is provided with above-mentioned arbitrary automobile gears state detector, The Magnet of this automobile gears state detector is fixed on the gear position operation bar of automobile.

Compared to prior art, this utility model has the advantage that this utility model provides a kind of automobile shelves Position state detector, this detector uses the crawl accurate to signal of magnetic induction array, reduces to greatest extent because of list The signal of individual magnetic field induction is uncertain, improves the stability of signal detection；This detector uses LIN simultaneously Bus communication, reduces output port, and the problem reducing output port burden weight, meanwhile, circuit is the most permissible Highly integrated, reduce small product size, easy for installation, there is stabilization capacity of resisting disturbance strong.

Accompanying drawing explanation

Fig. 1 is the circuit structure diagram of this practicality gear vehicle gear detector；

Fig. 2 is the circuit theory diagrams of the gear signal detection input block of this utility car gear detector；

Fig. 3 is the circuit theory of the gear display unit of this practicality gear vehicle gear detector；

Fig. 4 is the schematic diagram of the communication module circuitry of this practicality gear vehicle gear detector.

Detailed description of the invention

In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing And embodiment, this utility model is further elaborated.Should be appreciated that described herein specifically Embodiment, only in order to explain this utility model, is not used to limit this utility model.

Refer to Fig. 1, automobile gears state detector of the present utility model include MCU main frame 1 and all with Gear signal detection input block 2, gear display unit 3, the communication module that MCU main frame 1 is electrically connected with Circuit 4.In other embodiments, gear display unit 3, communication module circuitry 4 can omit and be not provided with, MCU main frame 1 can be band display function and/or the host module of communication function.MCU main frame 1 can be the U.S. The MCU chip that model is MC9S08DZ16 that Freescale company produces, uses the minimum of internal clocking System.

Incorporated by reference to Fig. 2, gear signal detection input block 2 can use integration magnetic strength element that Winson produces, Linear amplifier, sensitivity controller and output driving circuit and one, can extremely follow the trail of trickle accurately The high sensitivity linear Hall induction chip of change of magnetic field strength, therefore include linear Hall sensing IC array and magnetic Ferrum (not shown).This Magnet is fixed on the gear position operation bar of automobile, in this linear Hall sensing IC array Multiple linear Halls sensing IC represent different automobile gears, and become for following the trail of the magnetic field intensity of this Magnet Change.The outfan of this linear Hall sensing IC array is directly connected to the Part I I/O of this MCU main frame On interface, such as 6 I/O interfaces of Fig. 2 chips U1, in the present embodiment, linear Hall sensing IC 3 are only drawn, such as chip P1, P2, P3.

Gear display unit 3 is electrically connected with this MCU main frame 1, and this MCU main frame 1 drives this gear to show Show that unit 3 shows current automobile gears state.MCU main frame 1 comes really according to the change of magnetic field strength of this Magnet Which determine automobile to be on corresponding gear, then by gear display unit 3 display output.Gear display is single Unit 3 can be mainly made up of one eight sections common cathode charactron DS1 and peripheral circuit thereof, physical circuit schematic diagram As it is shown on figure 3, wherein COM end is the MCU core being connected to MCU main frame 1 by a digital switch On the I/O interface of the Part II of sheet U1.Eight sections of display inputs of charactron DS1 are through eight current limlitings Resistance (two resistor chain R3 and R4 as in Fig. 3) is directly connected to the of this MCU main frame 1 On the I/O interface of three parts.Digital switch can be audion Q1, and COM end connects the collection of this audion Q1 Electrode, the base stage of this audion Q1 is connected to the I/O of the Part II of this MCU main frame 1 via resistance R2 On interface, the emitter stage of this audion Q1 connects+5V power Vcc.

MCU main frame 1 is by communication module circuitry 4 and external communication.Communication module circuitry 4 can be mainly this Ground the Internet (LIN) master/slave protocol controller and LIN physical bus between interface mark transceiver and Its peripheral circuit forms, and physical circuit schematic diagram as shown in Figure 4, can be mainly by the type of En Zhi Pu company production Number being that standard transceiver chip U3 and its peripheral circuit of TJA1021 is constituted, this MCU main frame 1 sends Data stream is converted into bus signals through this mark transceiver, and by LIN bus and external equipment 5 communication； This mark transceiver is sent to this MCU main frame 1 at LIN bus input pin detection data stream.This mark The peripheral circuit of transceiver include resistance R11, resistance R12, resistance R13, resistance R14, electric capacity C7, Electric capacity C8.This mark transceiver also has pin NSLP, pin NWAKE, pin BAT, pin LIN, pin GND, pin TXD, pin RXD.The pin TXD of this mark transceiver connects should The pin TXD1 of MCU main frame, the pin RXD of this mark transceiver connect the pin of this MCU main frame TXD1.Pin TXD, pin RXD, pin NSLP the most respectively via resistance R11, resistance R12, Resistance R14 is electrically connected with+5V power Vcc.Pin NWAKE connects+12V power supply via resistance R13 Vcc.Pin BAT connects+12V power Vcc, and pin GND connects+12V power supply via electric capacity C7 Vcc.Pin LIN mono-aspect, via electric capacity C8 ground connection, on the other hand connects the pin of this MCU main frame TXD1.TXD, RXD of transponder chip is respectively connecting to MCU chip and has serial communication function I/O interface TXD1, RXD1, the externally connected equipment of LIN outfan 5.

In sum, the automobile gears state detector that the utility model discloses, it is adaptable to drive in test system Detection to the gear signal of vehicle, the advantage of this utility model is: isolates with automotive control system, is not required to Read former car systematic parameter, easy for installation, it is not necessary to vehicle is dismounted, contactless without abrasion, solely Special software anti-channeling shelves algorithm, integrated level is high, with low cost.

The foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model, All any amendment, equivalent and improvement etc. made within spirit of the present utility model and principle, all should Within being included in protection domain of the present utility model.

Claims (10)

1. an automobile gears state detector, it is characterised in that: it include MCU main frame and all with should The gear signal that MCU main frame is electrically connected with detects input block and gear display unit；Wherein, this gear letter Number detection input block includes linear Hall sensing IC array and Magnet；This Magnet is fixed on the gear behaviour of automobile Make on bar；Multiple linear Halls sensing IC in this linear Hall sensing IC array represents different automobile shelves Position, and the change of magnetic field strength of this Magnet can be followed the trail of, the outfan of this linear Hall sensing IC array directly connects Receive on the Part I I/O interface of this MCU main frame；This gear display unit is electrical with this MCU main frame Connecting, this gear display unit of this MCU host driven shows current automobile gears state.

2. automobile gears state detector as claimed in claim 1, it is characterised in that: the display of this gear is single Unit includes one eight segment numeral pipe and peripheral circuit thereof, and the COM end of this charactron is through a digital switch On the I/O interface of the Part II being connected to this MCU main frame, eight sections of display input warps of this charactron Cross on the I/O interface of the Part III that eight current-limiting resistances are directly connected to this MCU main frame.

3. automobile gears state detector as claimed in claim 2, it is characterised in that: this digital switch is Audion, COM end connects the colelctor electrode of this audion, and the base stage of this audion is connected to via resistance R2 On the I/O interface of the Part II of this MCU main frame, the emitter stage of this audion connects+5V power Vcc.

4. automobile gears state detector as claimed in claim 1, it is characterised in that: this automobile gears shape State detector also includes communication module circuitry, and this communication module circuitry is electrically connected with this MCU main frame, should MCU main frame is by this communication module circuitry and external communication.

5. automobile gears state detector as claimed in claim 4, it is characterised in that: this communication module electricity Road includes that the mark of the interface between the master/slave protocol controller of local internet LIN and LIN physical bus is received Send out device and peripheral circuit thereof；This MCU main frame sends data stream and is converted into bus letter through this mark transceiver Number, and by LIN bus and peripheral device communication；This mark transceiver detects at LIN bus input pin Data stream is sent to this MCU main frame.

6. automobile gears state detector as claimed in claim 5, it is characterised in that: this mark transceiver The standard transceiver chip using model to be TJA1021.

7. automobile gears state detector as claimed in claim 6, it is characterised in that: this mark transceiver Pin TXD connect the pin TXD1 of this MCU main frame, the pin RXD of this mark transceiver connects The pin TXD1 of this MCU main frame.

8. automobile gears state detector as claimed in claim 7, it is characterised in that: this mark transceiver Peripheral circuit include resistance R11, resistance R12, resistance R13, resistance R14, electric capacity C7, electric capacity C8； This mark transceiver also has pin NSLP, pin NWAKE, pin BAT, pin LIN, pin GND；Pin TXD, pin RXD, pin NSLP the most respectively via resistance R11, resistance R12, Resistance R14 is electrically connected with+5V power Vcc；Pin NWAKE connects+12V power supply via resistance R13 Vcc；Pin BAT connects+12V power Vcc, and pin GND connects+12V power supply via electric capacity C7 Vcc；Pin LIN mono-aspect, via electric capacity C8 ground connection, on the other hand connects the pin of this MCU main frame TXD1。

9. automobile gears state detector as claimed in claim 1, it is characterised in that: this MCU main frame Host module for band display function.

10. an automobile, it is characterised in that it is installed just like described in any one in claim 1 to 9 Automobile gears state detector, the Magnet of this automobile gears state detector is fixed on the gear position operation of automobile On bar.