CN2106099U

CN2106099U - Brake lamp failure monitor alarm for car

Info

Publication number: CN2106099U
Application number: CN 91227378
Authority: CN
Inventors: 王金厚
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-10-26
Filing date: 1991-10-26
Publication date: 1992-06-03

Abstract

The utility model discloses a brake lamp failure monitor alarm for a car, which is composed of detecting resistor R-[0], a light alarm monitor circuit [A], a sound alarm monitor circuit [B], a power supply indicator and a housing. The input tube BG-[2] of the light alarm monitor circuit [A] is a silicium tube. The input tube BG-[1] of the sound alarm monitor circuit [B] is a germanium tube, which ensures that the voltage changes generated by different types of faults on the detecting resistor R-[0] causes the output reactions made by the light alarm monitor circuit [A] and the sound alarm monitor circuit [B] to be different. Therefore, the purpose of making corresponding alarm according to the fault states is achieved. The output of the sound alarm monitor circuit [B] is controlled by the light alarm monitor circuit [A], which causes the brake lamp failure monitor alarm for a car to be switched on without a brake switch.

Description

Brake lamp failure monitor alarm for car

The utility model relates to braking automobile lamp failure prison and shows annunciator.

88219643 and No. 87207778 utility application of China disclose a kind of braking automobile lamp failure monitoring circuit of being made up of schmidt trigger circuit.The former is not provided with the acoustic alarm function, and for the different situations that single lamp or two lamp (comprising braking signal switch and circuit) fault take place, its trigger circuit input end is from testing circuit R ₀Behind the two ends picked-up monitor signal, the prison that its mouth is exported shows that signal is identical.So it does not only possess the acoustic alarm function, and can't distinguish warning to the fault of above-mentioned two kinds of different situations.Though having set up the output signal that an aerotron is used to absorb trigger circuit, the latter come the control loudspeaker to carry out acoustic alarm, but the above-mentioned problem of observing and predicting different situation faults of can't distinguishing is not still given solution, and, because the monitor that this patent application proposes, its circuit layout requires power supply could provide operating voltage to this monitor through braking signal switch, this makes this monitor when mounted, the former stoplight stop lamp circuit of using vehicle fully, must increase circuit in addition newly, cause the inconvenience of consumption line is installed, it is suitable inadequately to use.

The purpose of this utility model is to provide a kind of convenience to install on the former stoplight stop lamp line tower foundation of automobile, and can show annunciator to the prison that stoplight stop lamp list lamp, two lamp (comprising braking signal switch and circuit) fault are distinguished warning.

The purpose of this utility model can realize by following measure: a transistor BG base stage by the transistor BG collecting electrode of positive-negative-positive and the NPN type light that the forms prison of reporting to the police that directly is coupled is set shows switch circuit, and the BG pipe is synchronoused working in conducting or off condition with the BG pipe, the input end of this circuit is by emitter one base stage and base electrode bias resistance R of series connection of BG pipe ₂Form; And with the detection resistance R ₀Two ends and connect; BG ₂Also be connected to a load resistor R on the pipe collector ₅Be provided with one by BG ₁Pipe collector and BG ₃The pipe base stage acoustic alarm prison that forms that directly is coupled shows bistable trigger-action circuit ［ B ］, and this circuit input end is by BG ₁The common emitter circuit input end of being formed forms, R ₁Be BG ₁The base electrode bias resistance of pipe, this input end passes through BG ₁The base electrode bias resistance R of pipe ₁Connect the detection resistance R ₀With biasing resistance R ₂An end that links, and end is drawn and is used for the terminals E that this prison shows that annunciator and braking signal switch link thus; The BG of this input end ₁The emitter of pipe is connected and is detected resistance R ₀With BG ₂The end that the emitter of pipe connects; The delivery pipe BG of circuit ［ A ］ ₄Emitter and BG ₂Collector resitance R ₅And BG ₁The pipe collector resistance R ₃Join, and contact is drawn and is used for the terminals M that this prison shows that annunciator and power cathode and stoplight stop lamp one end link, BG thus ₄Load resistor R of collecting electrode series connection of pipe ₇With light-emitting diode D ₂Meet R later on ₀With BG ₂The contact that links of pipe emitter, and contact is drawn and is used for the terminals N that this prison shows that annunciator and positive source link thus, so that power supply can directly provide operating voltage to this monitor; The delivery pipe BG of circuit ［ B ］ ₃Loud speaker of collecting electrode series connection after with BG ₄The collecting electrode of pipe links, so that circuit ［ B ］ is based upon on circuit ［ A ］ basis, and its output is subjected to the control of circuit ［ A ］, BG ₃The emitter of pipe and terminals N connect.BG ₁Pipe is selected silicone tube, BG ₂Pipe is selected germanium tube, so that BG ₁The threshold voltage of pipe is higher than BG at least ₂The threshold voltage 0.3V of pipe.In addition, this prison shows between annunciator supply terminals M and the N and connects a power indicator.

BG ₃The emitter of pipe can directly connect with positive source terminals N, also can with BG ₁After the pipe emitter connects, connect with the positive source terminals through a series resistance again.

The utility model brake lights failure prison shows that annunciator is based upon acoustic alarm monitoring circuit ［ B ］ wherein on light warning monitoring circuit ［ A ］ basis, and make it be subjected to the control of circuit ［ A ］, thereby when having guaranteed that this prison shows annunciator without the direct energized of braking signal switch, its loud speaker is not sent out chimes of doom again by mistake; Guaranteed that this prison shows that annunciator can be easy for installation on the former stoplight stop lamp line tower foundation of automobile; Especially guarantee having or nothing and warning light bright or the various combination that puts out by chimes of doom, single lamp is distinguished warning with the fault of two two kinds of different situations of lamp (comprising braking signal switch and circuit), make the utlity model has and report to the police accurately specifically, install and economize the convenient and strong advantage of applicability of line.

Accompanying drawing 1 is that the prison that a kind of embodiment of the utility model provides shows annunciator and stoplight stop lamp.The integral structure circuit diagram that braking signal switch and power supply connect, wherein N.M is respectively power supply positive and negative electrode terminals, and E is the braking signal switch terminals, below in conjunction with accompanying drawing utility model embodiment is done further detailed explanation:

The prison of the utility model embodiment shows that light warning monitoring circuit ［ A ］ in the annunciator is by BG ₂Pipe (positive-negative-positive germanium tube).BG ₄Pipe (NPN type).R ₂, R ₅, R ₆, R ₇With light-emitting diode D ₁Form R ₆Be BG ₄Base electrode bias resistance, acoustic alarm monitoring circuit ［ B ］ is by BG ₁Pipe (PNP silicone tube).BG ₃Pipe R ₁, R ₃, R ₄Form R with loud speaker ₄Be BG ₃Base electrode bias resistance, BG ₃The emitter of pipe connects BG ₁Directly connect N end, R behind the pipe emitter ₀Voltage detecting resistance for the stoplight stop lamp loop.

This prison shows that the circuit operation process of annunciator is:

Under all normal situation of stoplight stop lamp and switch, power supply and circuit, when braking signal switch closure (i.e. brake), power supply is resistance R after testing ₀Power to stoplight stop lamp; Make stoplight stop lamp bright.At this moment, detect resistance R ₀Both end voltage all is higher than BG ₁And BG ₂The threshold voltage of pipe forces BG ₁And BG ₂So the equal conducting of two pipes is BG ₃Pipe ends; BG ₄Conducting, prison shows that annunciator is with loud speaker alarm free sound.Light-emitting diode D ₁The light-emitting diode D of shinny and power indicator ₂Shinny composite signal, the expression stoplight stop lamp uses normal.

Under the situation that stoplight stop lamp list lamp failure only takes place, when braking signal switch closure (i.e. brake), power supply is through R ₀Only to single stoplight stop lamp power supply, therefore loop current reduces, and just makes R ₀Terminal voltage descends, and is higher than BG ₂Threshold voltage is lower than BG ₁Threshold voltage; So BG ₂Still conducting, BG ₁Then end.At this moment, force BG ₃And BG ₄Manage equal conducting, loud speaker sends the warning sound, simultaneously, and light-emitting diode D ₁Shinny, power indicator light-emitting diode D ₂Shinny.Expression stoplight stop lamp list lamp failure.

At the two lamp et out of orders of stoplight stop lamp, perhaps braking signal switch et out of order, perhaps under the situation of line failure, no matter whether braking signal switch is closed, and equal no current in the stoplight stop lamp loop promptly detects resistance R ₀The two ends no-voltage; Cause BG ₁And BG ₂Guan Jun ends, at this moment, and BG ₃Conducting, and BG ₄End, this prison shows that annunciator is noiseless with loud speaker, light-emitting diode D ₁Extinguish and power indicator light-emitting diode D ₂Shinny composite signal, the two lamps of expression stoplight stop lamp or braking signal switch or circuit et out of order.

Under the situation of power output end et out of order, this prison shows that annunciator does not have operating voltage and quits work, then power indicator light-emitting diode D ₂Extinguish.

Biasing resistance R in the foregoing description ₁With R ₂Resistance value ratio be 1:1, R ₀Value is 0.3 Ω.

Claims

1, a kind of braking automobile lamp failure prison shows annunciator, and it is by detecting resistance R ₀, light warning monitoring circuit [A] partly, acoustic alarm monitoring circuit [B] partial sum shell forms, and it is characterized in that light warning monitoring circuit [A] is the transistor BG by positive-negative-positive ₂Collecting electrode and the transistor BG of positive-negative-positive ₄The base stage switch circuit that directly is coupled and forms, its input end is by BG ₂Emitter-the base stage of pipe and base electrode bias resistance R of series connection ₂Form this input end and detection resistance R _oTwo ends and meet BG ₂Also be connected to a load resistor R on the pipe collector ₅Acoustic alarm monitoring circuit [B] is by BG ₁The collecting electrode of pipe and BG ₃The bistable trigger-action circuit that the pipe base stage directly is coupled and forms, its input end is by BG ₁The input end of the common emitter circuit that pipe is formed forms, R ₁Be BG ₁The base electrode bias resistance of pipe; This input end passes through R ₁Connect the detection resistance R _oWith biasing resistance R ₂An end that joins, and end is drawn and is used for the terminals E that this monitor links to each other with braking signal switch, the BG in this input end thus ₁The pipe emitter is connected and is detected resistance R _oWith BG ₂The end that the pipe emitter connects; The delivery pipe BG of circuit [A] ₄Emitter and BG ₂Collector resitance R ₅And BG ₁Collector resitance R ₃Join, and contact is drawn and is used for this prison and shows annunciator and power cathode and the terminals M that links with stoplight stop lamp one end thus; BG ₄Load resistor R of pipe collector series connection ₇With light-emitting diode D ₁After meet R _oWith BG ₂The contact that the emitter of pipe links, and contact is drawn and is used for the terminals N that this prison shows that annunciator and positive source link thus; The delivery pipe BG of circuit [B] ₃Loud speaker of collecting electrode series connection after with BG ₄The collecting electrode of pipe connects; BG ₃The emitter of pipe and terminals N connect; BG ₁Be silicone tube; BG ₂Be germanium tube, to guarantee BG ₁The threshold voltage of pipe is higher than BG at least ₂0.3 volt of the threshold voltage of pipe; Biasing resistance R ₁With R ₂Resistance value ratio is 1: 1; Power indicator is connected between M and the N two ends.

2, prison according to claim 1 shows annunciator, it is characterized in that BG ₂Pipe collector is by biasing resistance R ₆With BG ₄The base stage of pipe directly is coupled.

3, prison according to claim 1 shows annunciator, it is characterized in that BG ₁The collecting electrode of pipe is by biasing resistance R ₄With BG ₃The base stage of pipe directly is coupled.

4, prison according to claim 3 shows annunciator, it is characterized in that BG ₃The emitter of pipe directly connects with positive source terminals N.

5, prison according to claim 3 shows annunciator, it is characterized in that BG ₃The pipe emitter connects BG ₁Connect with positive source terminals N by a series resistance behind the emitter of pipe.

6, prison according to claim 3 shows annunciator, it is characterized in that power indicator is by resistance R ₈A light emitting diode D connects ₂Form.