CN87210258U

CN87210258U - Display and alarm device for speed

Info

Publication number: CN87210258U
Application number: CN 87210258
Authority: CN
Inventors: 李明远
Original assignee: Individual
Current assignee: Individual
Priority date: 1987-07-22
Filing date: 1987-07-22
Publication date: 1988-07-13

Abstract

The utility model discloses a display and alarm device for speed for measuring and displaying the velocity of movement of objects, in particular to be used for measuring and displaying the speed of vehicle movement, mainly composed of a hall sensor, a counter, a periodical clear pulse generator, a decoder, and an output display circuit. The utility model can display the information of vehicle speed by the lamps of different colors installed on different positions at the outside of a carriage. Thereby, anyone can simply and accurately supervises the running speed of vehicles.

Description

Display and alarm device for speed

Be used to measure and show the kinematic velocity of object, especially for the speed display alarm of measuring and show vehicle movement speed.

In order to safeguard normal order of traffic, to guarantee traffic safety, different F-Zero restrictions is often arranged on the different highway sections, for this reason, traffic policemans are often by means of velocity radar or measure the speed of a motor vehicle of car by range estimation, but the former is difficult to generally adopt because of velocity radar costs an arm and a leg, the latter then is difficult to measures the speed of a motor vehicle exactly, therefore, does not also have a kind of easy, method that failure-free monitors road speed at present.

The purpose of this utility model just is to propose a kind of easy, reliable velocity display alarm, it is installed on the automobile, the information of automobile driving speed can be shown by the display lamp that is installed in the different colours on the compartment diverse location, thereby can make the traffic police need not any instrument just can monitor the moving velocity of car at any time.

Accompanying drawing is the schematic circuit diagram of this speed display alarm, and this figure of contrast describes content of the present utility model in detail below.

This Speed display alarm divides from function, mainly is made of following components: velocity sensor part (mainly being made of Hall element SH), counter portion are (mainly by counter IC₂Formation), part takes place (mainly by oscillator divider IC in the cycle quenching pulse₁, crystal resonator CO, R₁、R ₂、C ₁、C ₂、R ₃、C ₃Formation), individual and door IC of decoder part (by N(≤6)₃Formation), (be made of the identical circuit of N group, every group mainly by not gate IC for the output display part₄、BG ₁、BG ₂、D ₃、C ₇、R ₇Consist of with display lamp B), dynamically the display part is (mainly by not gate IC₅、R ₃、C ₅、D ₄、D ₅、C ₆、R ₆、BG ₄、BG ₅With display lamp B₀Consist of) and start clear pulse generator part (R₄、R ₅、C ₄And D₂), its basic functional principle is as described below:

The Hall element SH that is installed on the automotive interior car speed mileage table socket becomes wheel information into electric impulse signal, and this signal is sent to counting machine IC ₂Input end enter the position counting, trigger the 10th end by the falling edge of the 6th end again and carry out 10 countings, counting exporting to by several and a door IC ₃Decipher in the decoder that is unified into, the signal after translating is delivered to corresponding output display circuit respectively, for example, the some time first with the door be output as high level, then this signal passes through D ₃After not gate IC ₄Anti-phase, ingoing power promotes level (being that one-level promotes among the figure), makes BG ₁Base stage is that low level is ended, thereby makes switching valve BG ₂Conducting, display lamp B ₁Promptly luminous.As shown in the figure, design of encoder must make certain section time inside counting device counting sum many more, and decoder high level mouth is also many more, thus what of electroluminescent lamp just represent grand total certain period in how much.Consider calculator outdegree, N≤6 of output display part are preferable.For the constant speed of a motor vehicle, just be necessary to make counting machine periodically to work by the time, i.e. zero clearing at regular intervals once, like this, the speed of a motor vehicle in certain period is high more, the output pulse sum of that sensor is just many more, thereby luminous display lamp is also just many more.The cycle of this quenching pulse is about 0.3～1 second, too shortly or long all can not correctly obtain rotary speed information, it is mainly relevant with the method to set up of number of magnetic poles and decoder on the sensor rotating disk, if select model for use is the Hall element of SH111, magnetic pole is 9, by diagramatic way decoder is set, and the then this quenching pulse cycle was good with 0.5 second, the function that produces this pulse is partly finished by quenching pulse, IC ₁Have vibration and 14 division function concurrently, IC ₁With crystal resonator CO and R ₁, R ₂, C ₁, C ₂The composition oscillation frequency is 32768H ₈Oscillation circuit, its output signal is again through IC ₁Promptly become the cycle behind 14 frequency divisions and be 0.5 second periodic signal, this signal passes through R ₃, C ₃Just become the cycle behind the differential circuit of forming and be 0.5 second burst pulse, it passes through D ₁Be sent to IC ₂R end carry out the periodicity zero clearing.R ₄, R ₅, C ₄Form a start clear circuit, its quenching pulse passes through D ₂Deliver to IC ₂R end, so D ₁D ₂Be or circuit.

Dynamically the function of display part is to make display lamp B behind the automobile start ₀Just keep luminous, the front portion (R of this part ₈, C ₅, D ₄, D ₅, C ₆, R ₆) play the function that the pulse output that makes sensor becomes the pulsation-free high level signal, wherein C ₅Be partiting dc capacitor, D ₄Be C ₅Discharge loop, simultaneously it can stop the C that is full of electric charge ₆Discharge, R ₆, C ₆Form delay circuit, play smooth signal, prevent display lamp B ₀Flicker, its rear portion (IC ₅, BG ₄, BG ₅, B ₀) identical with aforesaid output display part.In each group output show circuit, C ₇, R ₇The same smooth signal that rises prevents the effect of display lamp flicker, D ₃Then prevent C ₇Discharge if desire to make some display lamp flicker to reach eye-catching effect, can be removed corresponding delay circuit.

During enforcement, IC ₁Can adopt model is the vibration frequency demultiplexer of CD4060, IC ₂Can adopt model is the counting machine of CD4518, IC ₃Selecting model for use is three inputs and door, IC of CD4073 ₅And a plurality of IC ₄Can share one 6 not gate, be the device of CD4069 such as model, when display lamp power is big, can increase a promotion level progression, makes BG simultaneously ₂The corresponding increase of power, remaining element, D, R, C etc. are common components, its model or numerical value can be selected for use by general custom.Display lamp B adopts the bulb of different colours, be arranged on the compartment, make driver, pedestrian and traffic police all can see it easily clearly, like this, as long as the traffic management system unification stipulated which kind of color lamp or how many lamps bright which kind of speed of a motor vehicle of expression, anyone can both monitor road speed easily.

The speed display alarm that the utility model proposes is simple in structure, cheap, installation, maintenance is convenient, the monitoring speed of a motor vehicle is easy, accurate, owing to adopted integrated circuit and crystal resonator, so circuit performance is reliable and precision is high, and it can be used as the speed display alarm of any equipment, only need be installed in Hall element on the different rotatable parts and get final product, so field of application is very wide.

Claims

1, be used for measuring and showing object of which movement speed, the speed display alarm especially for measuring and show running velocity is characterized in that

(a) this annunciator contains Hall element part, counter portion, cycle quenching pulse generation part, decoder part, output display part, dynamic display part and the clear pulse generator part of starting shooting;

(b) output of Hall element is connected to a counting machine position and dynamic display part, counting machine output is sent into the output display part by decoder, and the output of cycle clear pulse generator and start clear pulse generator is connected to the R end of counting machine respectively by diode.

2, speed display alarm according to claim 1 is characterized in that the cycle quenching pulse vibration takes place in the part share an integrated package with frequency division; This part also contains a crystal resonator and differential circuit.

3, speed display alarm according to claim 1, it is characterized in that exporting the display part and be made up of the identical output display circuit in N road (N≤6), phase inverter is contained on each road, power promotes level, switching valve and the display lamp of string between power supply and switching valve collecting electrode.

4, speed display alarm according to claim 1 is characterized in that Hall element is mounted on the automotive interior mileage meter socket.

5, can connect by resistance and the electric capacity delay circuit that forms in parallel between the speed display alarm according to claim 1, the not gate that it is characterized in that dynamic display part and each road output display part and ground.

6, speed display alarm according to claim 1 is characterized in that the color of display lamp can have nothing in common with each other, and they are installed on the compartment in proper order.