JPH0714905Y2 - Setting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a set value setting device, and more particularly, to an integrated device having a plurality of terminal pins to which set value data consisting of binary values are input in parallel. The present invention relates to a set value setting device that sets set value data to be input to a plurality of terminal pins on a printed circuit board having a plurality of pin insertion holes into which the plurality of terminal pins of a circuit element are respectively inserted.

[Conventional technology]

2. Description of the Related Art Conventionally, as a vehicle-mounted indicator, there is a cross-coil indicator which has a structure as shown in FIG. In the figure, L
Is a cross coil, and is composed of a pair of coils L ₁ and L ₂ which are arranged to intersect each other. Mg is a magnet rotor rotatably arranged in the composite magnetic field generated by the cross coil L, A is a pointer fixed to the rotating shaft of the magnet rotor Mg, and B is a pointer that cooperates with the pointer A to indicate a measurement amount. It is a scale plate.

In the above configuration, when the driving currents I ₁ and I ₂ shown in the following formula (1) are supplied to the pair of coils L ₁ and L ₂ , respectively, L ₁ = I ₀ cos θ (1) L ₂ = I ₀ sin θ The coils L ₁ and L ₂ generate magnetic fields Φ ₁ and Φ ₂ by this drive current.
And the magnetic field at that time is Φ ₁ = kn ₁ I ₁ = kn ₁ I ₀ cos θ (2) Φ ₂ = kn ₂ I ₂ = kn ₂ I ₀ sinθ (k: constant, n ₁ , n ₂ : The number of turns of coils L ₁ and L ₂ ).

In this case, the coils L _1, magnetic field [Phi ₁ where L ₂ is _generated, the combined magnetic field [Phi by [Phi _2, the magnetic field [Phi ₁ as shown in FIG. _4, [Phi ₂
, The magnet rotor Mg rotates in the direction of the combined vector, and the pointer A rotates accordingly. In the above equation (2), if the numbers of turns n ₁ and n ₂ are made equal, the direction (angle) θ ′ of the composite magnetic field Φ is And is equal to θ.

Therefore, cos θ and sin θ of the equation (1) are calculated according to a predetermined measurement amount.
When the currents shown in the equation (1) are supplied to the coils L ₁ and L ₂ by changing the value of θ, the direction θ ′ of the combined magnetic field generated by the cross coil L coincides with the above θ according to the equation (3). , The magnet rotor Mg rotated to the position of this angle θ '(= θ)
A predetermined amount of measurement can be recognized by reading the rotation angle of the pointer A with the deflection angle θ ′ of the pointer A and the scale of the scale plate B.

FIG. 5 shows a circuit configuration of a drive device for supplying a drive current according to a predetermined measurement amount to the cross coil L of the cross coil type indicator described above. In the figure, 11 is a detection pulse signal generation circuit that detects a predetermined measurement amount and generates a detection pulse signal of a frequency corresponding to this, 12 is a one-shot multi-circuit for adjusting the pulse width of the detection pulse signal to a constant value. The vibrator (OSM), 13 is a frequency / voltage (F / V) conversion circuit that receives the detection pulse signal that has passed through the OSM 12 and outputs a DC voltage according to the frequency of the detection pulse signal, and 14 ₁ , 14 ₂ are An arithmetic circuit that calculates pseudo values of cos θ and sin θ in the equation (1) based on the DC voltage output from the F / V conversion circuit 13, and 15 ₁ and 15 ₂ are pseudo cos θ and sin θ from each arithmetic circuit. The drive circuit receives the output, amplifies the output, and supplies the drive currents I ₁ and I ₂ shown in the formula (1) to the coils L ₁ and L ₂ .

In the above configuration, the detection pulse signal generation circuit 11 outputs a detection pulse signal having a frequency according to a predetermined measurement amount,
Input the pulse signal to the OSM12 and keep the pulse width constant.
Input to the / V conversion circuit 13. As shown in FIG. 5, the F / V conversion circuit 13 outputs a DC voltage corresponding to the frequency of the detection pulse signal and inputs the DC voltage to the arithmetic circuits 14 ₁ and 14 ₂ . The arithmetic circuits 14 ₁ and 14 ₂ are shown in FIG.
A trapezoidal pseudo cos θ, s with a phase difference of 90 ° as shown in b
Outputs signals that change to in θ. Arithmetic circuit 1
The pseudo cos θ and sin θ signals from 4 ₁ and 14 ₂ are the driving circuit 1
It is input to 5 ₁ , 15 ₂ and based on this, the drive circuit 15 ₁ , 15 ₂
Outputs the drive signal currents I ₁ and I ₂ of equation (1). The drive currents I ₁ and I ₂ are supplied to the coils L ₁ and L ₂ of the cross coil L, respectively. By the above-described operation, a synthetic magnetic field is generated in a direction corresponding to the predetermined measurement amount, the magnet rotor Mg is rotated in the synthetic magnetic field direction, and the pointer A is also rotated accordingly, so that the deflection angle of the pointer A with respect to the scale plate B is changed. To instruct a predetermined measurement amount.

The cross-coil indicating instrument described above is applied to, for example, a vehicle speedometer, a tachometer, or a fuel gauge.In the vehicle speedometer or the tachometer, the detection pulse signal generation circuit 11 responds to the rotation of the wheels of the vehicle as a predetermined measurement amount. The rotation sensor is used to input the rotation.

In the configuration as described above, the F / V conversion circuit 13 is provided with an integrator circuit including the variable resistor VR and the capacitor C as shown in FIG. 7, and the variable resistor VR is adjusted so as to be shown in FIG. Frequency of detected pulse signal-DC voltage (F / V)
The characteristic (inclination) of (1) is changed, and the indicator deflection angle per unit measurement amount is set to a desired value.

However, since such an adjusting work is performed for each indicating instrument, the adjusting work takes a long time, and the adjustment also varies depending on the operator. In addition, because the adjustment of F / V characteristics is decided by VR and C, there are various parts and it is necessary to prepare a circuit board for each indicating instrument with different specifications, which is a problem in parts management. was there.

Therefore, conventionally, in order to eliminate the above-mentioned problems, the signals are digitally processed to facilitate setting of the deflection angle of the pointer with respect to the measurement amount, as shown in FIGS. 9 and 10. A drive device having the configuration shown is considered.

First, in the driving device of FIG. 9, 21 and 22 are the same as the detection pulse signal generating circuit 11 and OSM 12 in FIG. Reference numeral 23 is a counter for inputting the detection pulse signal from the OSM 22, 24 is a reference clock signal generation circuit for outputting a reference clock pulse signal for giving a counting operation to the counter 23, and 25 is input to external terminals P _{0 to} P _5. A programmable frequency divider whose frequency division ratio is variable according to set value data, and 26 is, for example, a ROM in which duty data that is accessed using the count value from the counter 23 as address data is stored.
A rectangular wave signal generation circuit for generating a rectangular wave signal of a predetermined duty based on the duty data read from the memory 26; 28 ₁ and 28 ₂ denote rectangular wave signal generation circuits 27 The drive circuit supplies a drive current to each of the coils L ₁ and L ₂ of the cross coil L based on a rectangular wave signal.

In the above configuration, the detection pulse signal is input to the counter 23, which counts the reference clock pulse signal, so that the count value of the counter 23 becomes a value corresponding to the predetermined measurement amount. The memory 26 uses the count value as address data to access the duty data stored therein, and the duty data is read out by the rectangular wave signal generation circuit 27. The rectangular wave signal generation circuit 27 generates a rectangular wave signal with a predetermined duty based on this duty data. And this rectangular wave signal is input to the drive circuit 28 _1, 28 _2, the coil L ₁ of the drive current to the drive circuit 28 _1, 28 ₂ on the basis of this,
By supplying to L ₂ , the cross coil L generates a synthetic magnetic field in the direction according to the duty data read from the memory 26.

Next, the indicating operation of the cross coil type indicating instrument by the rectangular wave drive current will be described. The duty of each of the two rectangular wave signals output from the rectangular wave signal generation circuit 27
When a _1, a _2, the duty a ₁ in coil L _1, L _2, a ₂
The rectangular wave drive current of flows through the magnetic field Φ
_1, [Phi _{2 is, Φ 1 αa 1, Φαa 2} (0 ≦ a 1, a 2 <100) ... a (4). Therefore, the angle θ of the composite magnetic field is And is proportional to the duty ratio (a ₁ / a ₂ ).

Therefore, as the duty, cos θ and sin θ of the above equation (1) are
Corresponds to a ₁ and a ₂ and sets the count value of counter 23 to cos
By correlating θ and sin θ, cross coil
L ₁ and L ₂ generate a synthetic magnetic field according to the count value. That is, the duty factor a _{1 of} the rectangular wave signal,
Since a ₂ changes, the combined magnetic field direction of the cross coils L ₁ and L ₂ is generated in the direction of the angle θ set by the above equation (5), and the predetermined measurement amount is obtained from the rotation angle of the magnet rotor Mg and the pointer A. Is instructed.

Here, to obtain cos θ and sin θ according to the count value,
As shown in Table I below, the memory 26 stores duty data of cos θ and sin θ with the count value as address data. The duty data of cos θ and sin θ corresponding to the count value is read out to obtain a rectangular wave signal. It is input to the generation circuit 27.

Next, the operation when changing the deflection angle of the pointer A with respect to the predetermined measurement amount will be described. Counter 23 as described above
Counts the reference clock signal based on the detection pulse signal from the detection pulse signal generation circuit 21, and the count value becomes a value according to the frequency of the detection pulse signal. Therefore,
By varying the frequency of the reference clock pulse signal, a counter is provided for the detection pulse signal of the same frequency.
The count value of 23 can be changed.

The programmable frequency divider 25 is provided to change the frequency of the reference clock pulse signal, has external terminals P _{0 to} P ₅ for setting a frequency division ratio, and has a logic "H" or " By inputting a voltage corresponding to "L", the frequency division ratio is set as a binary value, and the frequency division ratio can be changed by changing the set value. Therefore, the external terminals P ₀ ~
P ₅ frequency division ratio setting the programmable frequency divider to input data
By setting the division ratio of 25, the clock pulse signal from the reference clock signal generation circuit 24 is divided by the divider 25 at a predetermined division ratio and then counted as a reference clock pulse signal in the count 23. Can be entered. That is, the frequency division ratio of the programmable frequency divider 25 is set according to the frequency division ratio setting data input to the external terminals P _{0 to} P _5, and the frequency of the reference clock pulse signal changes. The count value counted according to the frequency of the detected pulse signal is changed, and the address data for the memory 26 is changed.

Therefore, the duty data cos θ, sin θ accessed from the memory 26 varies according to the setting data, and the duty of the rectangular wave signal output from the rectangular wave signal generation circuit 27 varies. As a result, the combined magnetic field direction (deflection angle θ) of the cross coil L can be varied even with the same predetermined measurement amount.

Next, the drive device of FIG. 10 will be described. The same parts as those of FIG. 9 are designated by the same reference numerals. In FIG. 10, reference numeral 29 denotes a conversion circuit that multiplies the count value of the counter 23 by a coefficient k and converts the count value to another value. The coefficient k is set to be input to the external terminals P _{0 to} P _5. It varies according to the value data.

With the above configuration, the coefficient k corresponding to the set value data is multiplied by the count value, and the memory 26 is accessed using the value as address data. Therefore, the duty of the rectangular wave signal changes according to the set value data. Similarly to the figure, the deflection angle θ of the pointer A for the same predetermined measurement amount can be varied.

By the way, the programmable frequency divider 25 and the conversion circuit 29 of the driving device described above with reference to FIGS. 9 and 10 are generally integrated into a circuit and mounted on a printed circuit. The printed circuit board has external terminals P _{0 to} P ₅ for setting the division ratio of the programmable frequency divider 25 and external terminals for setting the coefficient of the conversion circuit 29.
A pin insertion hole into which a pin terminal of the integrated circuit element that becomes P _{0 to} P ₅ is inserted is formed. Then, in order to input the set value data to the pin terminals inserted in the pin insertion holes, a DIP switch for setting the binary set value data is mounted on the printed circuit board.

[Problems to be solved by the device]

However, when the DIP switch is mounted on the printed circuit board to set the binary set value data, a large area is occupied by the DIP switch mounted on the printed circuit board, and the device becomes large. In addition, there is a problem that a separate part called a dip switch is required as a means for setting the set value data, which causes an increase in cost.

Therefore, the present invention makes it possible to set the setting value without requiring any special parts on the printed circuit board and without occupying a large area, and thus the setting value setting is achieved in order to downsize the device and reduce the cost. An object is to provide a device.

[Means for Solving the Problems]

In order to solve the above problems, a set value setting device according to the present invention is provided with a plurality of pins into which the plurality of terminal pins of an integrated circuit device having a plurality of terminal pins to which set value data is input are inserted. On a printed circuit board having an insertion hole, in a set value setting device for setting set value data to be input to the plurality of terminal pins, the printed circuit board,
An electrical H level first pinch between the plurality of pin insertion holes
Setting conductive pattern and an electrically conductive L-level second conductive pattern are provided, and the setting conductive pattern extends in the direction of the first conductive pattern and the second conductive pattern through each of the pin insertion holes. And setting data is set by selectively connecting the setting conductive pattern corresponding to each pin insertion hole to one of the first conductive pattern or the second conductive pattern. It is characterized by that.

[Action]

In the above structure, the printed board is provided with the first electrically conductive pattern of the H level and the second electrically conductive pattern of the L level, with the plurality of pin insertion holes interposed therebetween.
A setting conductive pattern extending in the direction of the first conductive pattern and the second conductive pattern through each of the pin insertion holes is provided, and a setting conductive pattern corresponding to each pin insertion hole is provided as the first or first conductive pattern. Since it only needs to be selectively connected to, there is no need for special parts to set the set value, and there is no need to occupy a large area on the printed circuit board for setting the set value data. .

〔Example〕

 Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram showing an embodiment of a set value setting device according to the present invention. In FIG. 1, reference numeral 1 is a printed circuit board, and the printed circuit board 1 is an integrated circuit device and programmable frequency division in FIG. A container (not shown) or the conversion circuit (not shown) in FIG. 10 is mounted. These integrated circuit elements have a plurality of terminal pins into which set value data consisting of binary values are input in parallel, and the printed circuit board 1 is provided with a plurality of pins into which the terminal pins of these integrated circuit elements are respectively inserted. Insertion holes P ₀ ′ to P ₅ ′ are formed. Further, on the printed circuit board 1, an H conductive pattern 2a as a first conductive pattern having an electrically H level and a second electrically L level having a plurality of pin insertion holes P ₀ ′ to P ₅ ′ sandwiched therebetween. L conductive pattern 2b as a conductive pattern of the above, and setting conductive that extends through each of the pin insertion holes P ₀ ′ to P ₅ ′ and is connected to the H conductive pattern 2a and the L conductive pattern 2b. Patterns 2c _{0 to} 2c ₅ are provided.

Incidentally, H conductive patterns 2a, L conductive patterns 2b and the surface of the setting conductor patterns 2c ₀ ~2c _5, the pin insertion holes P ₀ '~P _5'
A resist (indicated by diagonal lines) is applied around the periphery of the so as to prevent solder from being deposited when the pin terminals of the integrated circuit element are dip-soldered.

In the above configuration, first, the external terminals P _{0 to} P ₅ (Fig. 9, Fig.
Insert the pin terminals of the integrated circuit element corresponding to (Fig. 10) into the pin insertion holes P ₀ ′ to P ₅ ′ of the printed circuit board 1 and correspond to the setting conductive patterns 2c _{0 to} 2c ₅ and the external terminals P _{0 to} P ₅ . Solder with the pin terminal. Then, according to the set value data to be set, the setting conductive patterns 2c _{0 to} 2c ₅ are connected to the external terminals P _{0 to} P _{5 by} the dotted line l ₁ so that the H level or L level voltage is supplied to each of them. Alternatively, at the position of l ₂ , the printed circuit board is cut at the time of manufacturing, before soldering, or at any time after soldering.

For example, when setting P ₀ , P ₃ and P ₅ to the H level and P ₁ , P ₂ and P ₄ to the L level respectively, the setting conductive pattern 2
c ₀ , 2c ₃ and 2c ₅ are connected to the L conductive pattern 2b and the pin insertion hole P ₀ ′,
Cut between P ₃ ′ and P ₅ ′ to set conductive patterns 2c ₁ and 2
c ₂ and 2c ₄ are H conductive pattern 2a and pin insertion holes P ₁ ′, P ₂ ′, P
Cut between ₄ '. This predetermined set value data 100101 is set, a predetermined frequency division ratio data and the coefficient k is input to the external terminal P ₀ to P _5.

FIG. 2 shows another embodiment. In this embodiment, the setting conductive patterns 2c _{0 to} 2c ₅ are between the H conductive pattern 2a and the L conductive pattern 2b and the pin insertion holes P ₀ ′ to P ₅ ′. Are separated by a constant gap G ₁ and G ₂ . And the pin insertion hole P ₀ ′ ~
Except for the peripheral portion of P ₅ ′, the H conductive pattern 2 a and the L conductive pattern 2 b and the setting conductive patterns 2 c _{0 to} 2 c ₅ which are adjacent to each other with the gaps G ₁ and G ₂ interposed therebetween, the resist (shown by diagonal lines). ) Has been applied. That is, the conductive pattern is exposed at the portion where the resist is not applied.

In the above structure, first, the external terminals P _{0 to} P ₅ (see FIG. 9 and FIG.
(Fig. 10) Pin terminals of the integrated circuit element corresponding to
Insert into P ₀ ′ to P ₅ ′, pin terminal and conductive pattern for setting 2c
Solder _{0 to} 2c ₅ . After that, according to the contents of the set value data to be set, each setting conductive pattern 2c _{0 to} 2c ₅ and H
The gap G ₁ with the conductive pattern or the gap G ₂ with the L conductive pattern 2b is selectively soldered to electrically connect the two.

For example, when setting the external terminals P ₀ , P ₃ and P ₅ to the H level and P ₁ , P ₂ and P ₄ to the L level respectively, the H conductive pattern
2a and setting the conductive pattern 2c _0, 2c _3, the gap G ₁ between the 2c ₅
, L conductive pattern 2b and setting conductive pattern 2
The gap G ₂ between c ₁ , 2c ₂ and 2c ₄ may be connected. In this way, the setting value data is set by the setting conductive patterns 2c _{0 to} 2c ₅ selectively connected to the H conductive pattern 2a or the L conductive pattern 2b, and the set value data is input from the external terminals P _{0 to} P ₅ and the frequency division is performed. Ratio data and coefficient k are set.

When the set value setting device configured as described above is applied to set the set value data of the cross coil type indicating instrument, when the desired deflection angle θ per unit measurement amount to be indicated changes, the preset value is preset. The conductive pattern on the printed circuit board can be selectively connected to external terminals based on the divided frequency setting data and coefficient k.
By connecting to P _{0 to} P ₅ , the deflection angle θ can be set to a desired value.

At this time, when the cross coil indicating instrument is produced, the division ratio setting data and the coefficient k are set in advance, and the integrated circuit elements such as the reference clock signal generating circuit are installed in FIGS.
When mounting on the printed circuit board 1 shown in the figure, the setting conductive patterns 2c _{0 to} 2c ₅ are cut or the gap G ₁ is set as described above.
Alternatively, by connecting G ₂ with solder, the external terminal P ₀
Dividing ratio setting data and coefficient k to be inputted is set to to P _5.

Further, when indicating different types of predetermined measurement amounts using the same indicating instrument, the pointer deflection angles per unit predetermined measurement amount are different from each other, but in such a case, the external terminals P _{0 to} P ₅ are After mounting on the printed circuit board, the dividing ratio setting data and the coefficient k corresponding to the predetermined measured amount which is recognized in advance are selected and external terminals P _{0 to} P are selected by selectively connecting the setting conductive patterns 2c _{0 to} 2c _5. Set it to ₅ .
This allows setting conductive patterns on the same printed circuit board.
By selectively connecting 2c _{0 to} 2c ₅ to external terminals P _{0 to} P ₅ ,
It is possible to realize a cross-coil type indicating instrument for a predetermined measurement amount of a type in which the deflection angle per unit predetermined measurement amount is different, and it is possible to easily cope with a small amount and various types of production.

〔effect〕

As described above, according to the present invention, the setting conductive pattern previously formed on the printed circuit board is electrically connected to one of the H-level first conductive pattern and the L-level second conductive pattern. Since the setting value can be set by using, there is no need for special parts to set the setting value, and there is no need to occupy a large area on the printed circuit board. Can be down.

[Brief description of drawings]

1 is a diagram showing an embodiment of a set value setting device according to the present invention, FIG. 2 is a diagram showing another embodiment of the present invention, FIG. 3 is a diagram showing the structure of a cross-coil type indicating instrument, FIG. 4 is an explanatory view for explaining the operation principle of the instrument of FIG. 3, FIG. 5 is a block diagram showing a driving device of the instrument of FIG. 3, and FIGS. 6 to 8 are diagrams of the apparatus of FIG. FIG. 9 and FIG. 10 are explanatory diagrams for explaining the operation, and are block diagrams showing examples of a digital drive device, respectively. 1 ... Printed circuit board, 2a ... First conductive pattern, 2b ...
... second conductive pattern, 2c ₀ ~2c ₅ ...... set conductive pattern, P ₀ '~P _5' ...... pin insertion holes, P ₀ ~P ₅ ...... external terminal.

Claims (1)

[Scope of utility model registration request] 1. A plurality of terminals on a printed circuit board having a plurality of pin insertion holes into which the plurality of terminal pins of an integrated circuit device having a plurality of terminal pins to which set value data is input in parallel are inserted. In a set value setting device for setting set value data to be input to pins, a first electrically conductive pattern of an H level and a second electrically level of L are provided on the printed circuit board with the plurality of pin insertion holes interposed therebetween. A conductive pattern is provided, and the first conductive pattern and the second conductive pattern pass through each of the pin insertion holes.
A conductive pattern for setting extended in the direction of the conductive pattern, and the conductive pattern for setting corresponding to each pin insertion hole is selectively connected to one of the first conductive pattern or the second conductive pattern. The set value setting device is characterized in that the set value data is set.