RU2045780C1 - Device for identifying parts in enclosed nonmetal packings - Google Patents

Abstract

FIELD: automatic control. SUBSTANCE: parts contained in nonmetal packings during their manufacture, sorting-out, and storage are provided with identifying sensors made in the form of oscillating LC circuit whose tuning frequency determines unambiguously identifier of particular part or group of parts with one identifier placed in common packing, and decoding unit is built up of series-connected high-frequency oscillator, amplitude detector, and voltage drop signal shaper, high-frequency oscillator voltage changing unit, electronic switch unit, decoder, and display unit. EFFECT: reduced time and expenses associated with identification and check-up of parts placed in nonmetal packing. 3 cl, 7 dwg

Description

 The invention relates to automation and can be used in any industry where it is required to automate the process of identifying products that are in closed non-metallic packaging, for example, when moving products in packages during their production along the conveyor, when sorting products in packages, and automate the process of controlling the availability of products in packages.

 Currently, in order to identify products in packages, each package is visually inspected to read its identifier, and in its absence, the package or its part is opened, the product is removed from it (or the part of the product containing the identifier) and the product is re-packaged. . The use of this method for identifying products in closed packaging requires a lot of time and material costs, and can not be automated.

 A device for accounting items (parts) of equal weight in an open package, namely, to determine the number of parts in this package using digital scales (ed. St. N 1287209, 1985).

 A device is known for identifying products stored on a display window using a transceiver with an antenna, to which a set of fixed frequencies is transmitted to interrogate transponders attached to identifiable products. Transponders convert the received transmitter signals into a response signal, which is detected by the receiving unit of the mobile identification device.

 However, this identification device does not allow the use of a non-emitting electromagnetic energy sensor as an identifying sensor. Receiving a response signal carrying information about the product identifier in the form of radio emission in this identification device determines the use of a radio receiving device, which complicates the identification process with significant extraneous radiation in the used frequency band. The use of an identifying sensor emitting a high-frequency signal and a receiving device for receiving it increases the cost of the identification device and reduces its reliability.

 The aim of the present invention is to reduce the time and material costs associated with the identification and control of products pre-equipped with sensors in closed non-metallic packaging, in the manufacture of products, their sorting and storage.

 This goal is achieved by the fact that on the inner side of the package containing the identifiable product, an oscillating LC circuit is fixed, which acts as a sensor, the tuning frequency of which uniquely determines the identifier of this product or groups of products with one identifier located in a common package. To identify products that have different identifiers but are in a common package, sensor circuits are introduced to identify each of the products in the package. When making an inextricable connection of the LC loop sensor with an identifiable product, the presence of the product in the package can also be checked. In the process of product identification, the LC frequency of the loop sensor is measured and decoded into the corresponding identifier by the device described below. The frequency of the LC circuit of the sensor is measured by recording the change in voltage on the LC circuit of the sinusoidal oscillator, which is inductively coupled to the LC circuit for the duration of the measurement. In order to reduce the overall dimensions and provide greater inductive coupling with the generator circuit, the LC coil of the sensor loop is made flat.

 The proposed device is illustrated by the structural diagrams presented in FIG. 1, 2, 3, 4, 5, and stress plots shown in FIG. 6, 7.

 The product identification device (Fig. 1) contains a high-frequency sinusoidal oscillator 3 with an oscillating circuit 2, which is inductively coupled to the sensor circuit 1 in the LC packaging for the time of identification, as well as an amplitude detector 4, a voltage reduction recording unit 5, a frequency coding unit generator 6, electronic keys 7, memory 8, decoding device 9 and display device 10. Frequency coding unit of generator 3 (by tuning its LC circuit 2), as well as issuing the corresponding one at the moment nt time of the code for the input of electronic keys 7. The high-frequency voltage taken from the LC circuit 2 is detected by the amplitude detector 4. The constant voltage level from the amplitude detector 4 is supplied to the input of the registration unit for reducing the voltage level 5. If the frequency of the high-frequency generator 3 matches the tuning frequency of the LC circuit -sensor 1, there is a decrease in the level of high-frequency voltage on the LC circuit 2 (due to the "suction" of a part of the energy from the LC generator circuit by the sensor circuit) and the DC voltage level on the input e of the amplitude detector 4. The registration unit for reducing the voltage level 5 generates a signal supplied to the control inputs of electronic keys 7, which pass the generator frequency code at the current time to the input of memory 8. The decoding device 9 decodes the frequency code of the high-frequency generator 3 into the product code identifier, which is displayed by the display device 10.

 Two options are proposed for constructing a generator frequency coding unit (unit 6 in FIG. 1).

 The first embodiment of the generator frequency encoding assembly is illustrated by the block diagram shown in FIG. 2. The axis of the capacitor of variable capacitance LC circuit 2 of the high-frequency generator rotates synchronously with the magnetic disk 11. Around the circumference of the magnetic disk 11 is a series of uniformly spaced magnetic marks whose signals are read by the magnetic head 12. The voltage pulses taken from the magnetic head 12 are amplified by an amplifier 14 and fed to the input of the counter 16. On the magnetic disk 11 is also marked with a minimum capacitance of a variable capacitor, the signal from which is read by the magnetic head 13 and after The power of the amplifier 15 produces a reset of the counter 16. Thus, to each angle of rotation of the rotor of the capacitor of variable capacitance, as well as the frequency of the high-frequency generator, a certain value of the counter 16 corresponds.

 The second embodiment of the construction of the generator frequency coding unit (unit 6 in FIG. 1) is explained in the block diagram shown in FIG. 3. The oscillation frequency tunable by any of the known methods LC circuit 2 of the high-frequency generator is periodically measured by a frequency meter 17.

 There are two options for constructing a voltage reduction recording unit (node 5 in FIG. 1).

 The first embodiment of the construction of the recording unit for reducing the voltage level 5 is illustrated by the structural diagram shown in FIG. 4. When the voltage level coming from the amplitude detector 4 is higher than the voltage level coming from the reference voltage source 19, the output signal of the comparator 18 is absent. (What happens when the generator frequency does not match the tuning frequency of the LC loop sensor). When the voltage level at the output of the amplitude detector decreases below the level of the reference voltage, a signal appears at the input of the comparator 18.

 The second embodiment of the construction of the recording unit for reducing the voltage level (node 5 in Fig. 1), eliminating the influence of instability of the amplitude of the oscillations of the high-frequency generator during its adjustment, explains the structural diagram shown in Fig. 5. The voltage from the amplitude detector 4 is supplied directly to one of the inputs of the comparator 18. At the second input of the comparator 18, the voltage from the amplitude detector 4 is supplied through the integrating circuit 20. The integration time of the integrating circuit 20 is selected so that short-term “dips” of the voltage at the amplitude output detector 4 does not cause a change in voltage at its output, while a change in voltage at the output of amplitude detector 4, caused by the amplitude-frequency instability of the high-frequency generator, transfers Xia on her way out. Thus, a signal appears at the output of comparator 18 during a short-term decrease in voltage at the output of amplitude detector 4.

 The operation of the recording units for reducing the voltage level 5 is illustrated by the voltage diagrams shown in FIG. 6, 7.

 In FIG. 6a shows the change in the voltage level taken from the amplitude detector during the tuning of the generator, and also shows a short-term decrease in the voltage at the output of the amplitude detector caused by the influence of the LC sensor loop. The same figure shows the level of the reference voltage applied to the input of the comparator. In FIG. 6b shows the output voltage pulse generated by the comparator when the voltage at the output of the amplitude detector decreases below the level of the reference voltage. In FIG. 7a and 7b show the change in the voltage level during the tuning of the generator, respectively, at the output of the amplitude detector and at the output of the integrating circuit. In FIG. 7c shows the output signal of the comparator generated at the moment of a short-term decrease in voltage at the output of the amplitude detector.

 The use of the proposed device for identifying products that are in closed non-metallic packaging can reduce the identification time, fully automate the identification process, and also reduce the associated material costs.

Claims (3)

 1. DEVICE FOR IDENTIFICATION OF PRODUCTS IN CLOSED NON-METAL PACKAGES, containing interconnected identifier sensor mounted on the product or package, and a decoding unit, characterized in that the identifier sensor is made in the form of an oscillating circuit, and the decoding unit contains a series-connected high-frequency generator the oscillatory circuit of which is inductively coupled to the oscillatory circuit of the identifier sensor, an amplitude detector and a shaper of voltage level reduction signals , the frequency control unit of the high-frequency generator, the electronic key block, the memory block, the decoder and the display unit, the outputs of the voltage control signal generator and the frequency change unit of the high-frequency generator are connected to the control and information inputs of the electronic key block, respectively, the outputs of which are connected to the input of the memory block .  2. The device according to p. 1, characterized in that the frequency control unit of the high-frequency generator contains a magnetic disk kinematically connected with the rotor of the variable-capacitor capacitor of the oscillatory circuit of this generator with the possibility of their synchronous rotation, the first and second amplifiers, a counter, the first and second magnetic heads coupled to the surface of the magnetic disk, the outputs of which are connected through the first and second amplifiers to the counting and zeroing inputs of the counter.  3. The device according to claim 1, characterized in that the voltage control signal generator comprises an integrating element and a comparator, the output of the driver is connected directly and through the integrating element to the first and second inputs of the comparator, respectively, the output of which is the output of the driver.